KR101133361B1 - Joining method, and joined structure manufacturing method - Google Patents

Abstract

Provided are a joining method and a method for producing a joined structure that can improve the airtightness and watertightness of the joined metal member. The joining method which concerns on this invention is a joining method which performs friction stirring with respect to the to-be-joined metal member 1 formed when the 1st metal member 1a and the 2nd metal member 1b were opposed, and the 1st metal member 1a ) And the first main joining step of performing friction stirring on the surface A of the metal member 1 to be joined to the butt portion J1 of the second metal member 1b, and the to-be-joined portion J1. And a second main joining step of performing friction stirring on the back surface B of the metal member 1, and a side welding step of welding a side surface of the metal member 1 to be joined to the butt portion J1. In the side welding process, the unfired area | region between the surface side plasticization area | region W1 formed in the 1st main joining process, and the back surface side plasticization area | region W2 formed in the 2nd main joining process is weld metal (T). It is characterized by covering with a seal.

Description

Joining method and manufacturing method of joining structure {JOINING METHOD, AND JOINED STRUCTURE MANUFACTURING METHOD}

This invention relates to the joining method of a metal member using friction stirring, and the manufacturing method of a joining structure.

Friction stir welding (FSW = Friction Stir Welding) is known as a method of joining metal members. In friction stir welding, the metal members are solid-phase bonded by moving along the butt | matching part of metal members, rotating a rotary tool, and plastically flowing the metal of the butt | matched part by frictional heat of a rotary tool and a metal member. Moreover, it is common for a rotating tool to protrude and provide a stirring pin (probe) in the lower end surface of the shoulder part which shows a cylinder shape.

FIG. 88 is a perspective view showing a conventional bonding method in which friction stir welding is performed on a pair of metal members. As shown in FIG. 88, when the thickness of the metal members 101 and 101 to be joined is larger than the length of the stirring pin of the rotating tool which is not shown in figure, friction stirring from the surface 102 side of the metal member 101 is carried out. After joining, friction stir welding may be performed also from the back surface 103 side.

That is, this conventional joining method performs friction stir welding from both sides of the surface 102 and the back surface 103 along the butt part 104 (two dashed-dotted line) of the metal members 101 and 101, and performs friction stir welding. It joins so that the center part of the thickness direction of the plasticization area | regions 105 and 106 formed by this may contact. Thereby, in the butt | matching part 104, it can join without a gap. Such a joining method is described in document 1, for example.

89 is a cross-sectional view showing a conventional joining method in which friction stir welding is performed between a pair of metal members via a joint member. As shown in FIG. 89, when the thickness of a metal member is large with respect to the length of the stirring pin of a rotating tool, friction stirring is performed stepwise through a joint member between a pair of metal members provided with the step part with a different thickness. The joining method to perform is known.

As shown in FIG. 89, the metal member used for this conventional joining method has a main-body part in the edge part of the main-body parts 121 and 121 of the 1st metal member 120a and the 2nd metal member 120b. Step portions 122 and 122 having a thickness smaller than those of 121 are formed.

In this conventional joining method, a step of joining the step portions 122 and 122 of the first metal member 120a and the second metal member 120b to each other, and the step of joining the step portions 122 and 122 to each other. Step joint friction stirring step of performing friction stir with respect to Jd, joint member arranging step of arranging joint member U in the recessed part 123 formed in the butting process, 1st metal member 120a, and a joint member. The friction stirring process of performing friction stirring with respect to the butt | matching part Ja of (U), the 2nd metal member 120b, and the butting part Jb of the joint member U is provided. According to this joining method, even if the member with a large thickness of a metal member can join together metal members. This joining method is described in document 2.

FIG. 90 is a view showing a conventional joining method in which friction stir welding is performed on a joined metal member in which a joint member is inserted into a hollow portion formed between a pair of metal members, and (a) is a method for joining before ( b) shows after conjugation.

In this conventional joining method, the concave groove 130a cut out at the end of the first metal member 130 and the concave groove 131a cut out at the end of the second metal member 131 are abutted. The to-be-joined metal member 134 formed by inserting the joint member 133 in the hollow portion formed by 131a is formed. Then, friction stir welding is performed on the butt portions Je and Jf of the first metal member 130 and the second metal member 131. This joining method is described in document 3.

[Patent 1] Japanese Patent Application Laid-Open No. 2005-131666 [Patent 2] Japanese Patent Application Publication No. 2004-358535 [Patent 3] Japanese Patent Application Laid-Open No. 2004-167498

91 is a perspective view illustrating a joining method in which friction stir welding is performed on a pair of large metal members. As shown in FIG. 91, when the thickness of the metal members 111 and 111 to be bonded is large, even if friction stir welding is performed from the surface 102 and the back surface 103, butt | matching part 104 (two dashed-dotted line) There is a possibility that an unfired region is generated in the center of the. That is, even when the thickness of the metal member 111 is very large with respect to the length of the stirring pin of the rotating tool which is not shown in figure, even if friction stirring was performed from the surface 102 and the back surface 103 of the metal member 111, Since the center part of the thickness direction of the plasticization area | region 105 and 106 cannot be contacted, the clearance gap (unbaked area | region 119) generate | occur | produces in the center part of the butt | matching part 104. Thus, when the unfired area | region 119 which continues from one side surface 107 to the other side surface 108 generate | occur | produces, there exists a problem that the watertightness and airtightness of a metal member fall.

Here, when the length of the stirring pin of the rotary tool is enlarged according to the thickness of the metal member 111, joining the metal members 111 without a gap by performing friction stir welding from the front surface 102 and the back surface 103 is performed. It is possible. However, since the rotating tool moves while embedding the stirring pin in the metal member 111 and rotates at high speed, increasing the length of the stirring pin increases the load acting on the driving means and the stirring pin of the friction stirring device, There was a problem of causing a shortened life.

88 and 91, in the plasticized regions 105 and 106, there is a possibility that a cavity defect 109 continuous from one side 107 to the other side 108 occurs. Such a cavity defect 109 was one cause of lowering the watertightness and airtightness of the metal members 101 and 111.

On the other hand, as shown in FIG. 89, even if the thickness of the metal members 120a and 120b became large, using a joint member U can perform friction stirring in steps. However, in the plasticized regions WJa, WJb, and WJc formed by frictional stirring, there is a possibility that a cavity defect that is continuous from one side to the other side may occur, thereby reducing the watertightness and airtightness of the metal members 120a and 120b. It was one cause.

On the other hand, as shown in FIG. 90, when joining the edge parts of the 1st metal member 130 and the 2nd metal member 131 through the joint member 133, the 1st metal member 130 and Since the butt portion 130b of the joint member 133 and the butt portion 131b of the second metal member 131 and the joint member 133 remain as unfired regions, the watertightness of the metal member 134 to be joined and There was a problem that airtightness was lowered.

In view of this, it is an object of the present invention to provide a joining method and a method for producing a joined structure that can improve the airtightness and watertightness of the joined metal member.

The joining method which concerns on this subject is a joining method which carries out friction stir by moving a rotating tool with respect to the to-be-joined metal member which abuts the 1st metal member and the 2nd metal member, The said 1st metal member And a first main joining step of performing friction stir from the surface of the metal member to be joined to the butt portion of the second metal member, and a second bone performing friction stir from the back surface of the metal member to be joined to the butt portion. And a side welding step of welding from the side surface of the joined metal member to the butt portion, wherein the side welding step includes a surface side plasticized region formed in the first main bonding step and the second side. It is characterized by covering the unbaked region between the backside-side plasticized region formed in the present bonding step with a weld metal.

According to this joining method, the surface and the back surface of the metal member to be joined are frictionally agitated, and the abutment portions of the side surfaces are welded so that the unbaked region existing between the surface-side plasticization region and the back-side plasticization region is used as the weld metal. By covering, the airtightness and water tightness of a to-be-joined metal member can be improved.

And a concave groove forming step of forming a concave groove along the abutment portion of the side surface of the joined metal member before the side welding process, wherein the concave groove is filled with the weld metal in the side welding step. It is desirable to.

According to this joining method, the concave groove can be filled with the weld metal, so that the welding operation can be easily performed, and the unfired region can be reliably covered with the weld metal.

Here, when friction stir welding is performed at the butt part in the first main joining step and the second main joining step, since the metal is insufficient due to the bundle of burrs, both side surfaces inside the front side plasticized area and the back side plasticized area. There is a possibility that a tunnel-shaped cavity defect (hereinafter referred to as a tunnel-shaped cavity defect) that is continuous between them is formed. In addition, when friction stir welding in a 1st main joining process and a 2nd main joining process is applied to the side surface of a to-be-joined metal member, the oxide film formed in the said side surface is made into the surface side plasticization area | region and the back side small side. There is a possibility of winding inside the torch area.

However, according to the joining method according to the present invention, even if a tunnel-shaped cavity defect or an oxide film is generated inside the surface side plasticized region and the back side plasticized region, the oxide film can be removed by forming a concave groove in the side surface. At the same time, the weld groove is filled in the concave groove, thereby segmenting the tunnel-shaped cavity defect. Thereby, the watertightness and airtightness of a to-be-joined metal member can be improved further.

Moreover, it is preferable that the width | variety of the said recessed groove is smaller than the width | variety of the said surface side plasticization area | region and the said back surface side plasticization area | region. According to such a joining method, the plasticizing region can be brought into contact with the weld metal, and the range for filling the weld metal can be made small, thereby improving work efficiency.

Moreover, it is preferable to cut out the part which protruded from the side surface of the said to-be-joined metal member among the said weld metals after the said side welding process. According to this joining method, the finished surface can be smoothly formed by cutting the weld metal protruding from the side surface. In addition, the part which protruded from the side surface of the to-be-joined metal member among weld metal is also called padding part.

Moreover, it is preferable to form a preliminary hole in advance at the insertion position of the said rotary tool. According to this joining method, the press-in resistance at the time of press-in a rotary tool can be reduced. Thereby, the precision of friction stir welding can be improved, and a joining operation can be performed quickly.

Moreover, this invention is a manufacturing method of the joining structure formed by making the end surface of a 1st metal member and the 2nd metal member abut, and it is the joint structure of the said joining structure with respect to the butt | matching part of a said 1st metal member and a said 2nd metal member. The first main joining step of performing friction stir from the surface, the second main joining step of carrying out friction stir from the back surface of the joining structure to the butt portion of the first metal member and the second metal member, and the joining structure A concave groove forming step of forming a concave groove from a surface of the joining structure to a back surface along an abutment portion of the first metal member and the second metal member, and inserting a joint member into the concave groove. The joint member insertion step and the friction stirring with respect to the butt | matching part of the said joint structure and the said joint member are performed from the surface of the said joint structure. In the third main joining step, the fourth main joining step of performing friction stir from the rear surface of the joining structure with respect to the abutting part between the joining structure and the joint member, and the abutting part between the joining structure and the joint member, And a side welding step of welding from the side surface of the joining structure to the unfired area formed between the plasticized area formed in the third main bonding step and the plasticized area formed in the fourth main bonding step. It features.

According to the manufacturing method of such a joined structure, on the surface, the back surface, and the side surface of a joined structure, the joining part of a joining structure and a joint member is joined, and the joint of a joining structure and a joint member is covered with a weld metal, and therefore, a 1st metal member The airtightness and watertightness in the junction part of the 2nd metal member can be improved.

Moreover, after the said concave groove forming process, in the butt | matching part of the said 1st metal member and the said 2nd metal member, the plasticization area | region formed in the said 1st main joining process, and the plasticization area | region formed in the said 2nd main bonding process, and It is preferable to perform welding from within the said recessed groove with respect to the unfired area | region formed in between.

Moreover, after the said concave groove forming process, in the butt | matching part of the said 1st metal member and the said 2nd metal member, the plasticization area | region formed in the said 1st main joining process, and the plasticization area | region formed in the said 2nd main bonding process, and It is preferable to form a groove part in the said recessed groove along the unbaked area | region formed in between, and to fill this groove part with a weld metal.

According to the manufacturing method of such a joining structure, after welding is performed from the recessed groove with respect to the unfired area | region formed in the butt | matching part of a 1st metal member and a 2nd metal member, a joint member is inserted in a recessed groove, Welding is performed from the side surface to the butt portion of the joint member. Therefore, since the side part of a joining structure is in the state welded in the double direction in the thickness direction, the airtightness and water tightness in the joining part of a 1st metal member and a 2nd metal member can be improved further.

Moreover, in the structure which fills a weld metal with the groove part formed along the unbaked area, filling operation of a weld metal can be performed easily, and a unbaked area can be reliably covered with a weld metal.

Moreover, in the said side welding process, in the butt | matching part of the said joining structure and the said joint member, the micro formation formed between the plasticization area | region formed in the said 3rd main joining process, and the plasticization area | region formed in the said 4th main bonding process. It is preferable to form a groove part in the side surface of the said joining structure along the formation region, and to fill this groove part with a weld metal.

According to this method of manufacturing the bonded structure, by filling the weld metal into the groove formed along the butt of the bonded structure and the joint member, the welding metal can be easily filled and the unfired region can be reliably covered with the weld metal. have.

Moreover, it is preferable to cut out the part which protruded from the side surface of the said recessed groove among the welding metal filled in the groove part formed in the said recessed groove. According to the manufacturing method of such a joining structure, since the side surface (bottom surface) of a concave groove can be shape | molded smoothly, and the outer surface of a joint member can be closely contacted, the joining structure and the joint member in the junction part The airtightness and watertightness can be improved.

In addition, it is preferable to cut out a portion protruding from the side of the joining structure of the weld metal filled in the groove portion formed on the side of the joining structure. According to the manufacturing method of such a joined structure, by cutting out the weld metal which protruded from the side surface of a joined structure, the finishing surface of a joined structure can be shape | molded smoothly.

Moreover, this invention is the joining method which performs friction stirring by moving a rotating tool with respect to the to-be-joined metal member formed which the end faces of a 1st metal member and a 2nd metal member mutually met, The said 1st metal member and said 2nd A side main welding step of performing welding from the side surface of the metal member to be joined to the abutting portion of the metal member, and a first bone bonding performing friction stir from the surface of the metal member to be joined to the abutting portion after the side welding process. And a second main joining step of performing friction stir from the back surface of the joined metal member to the butt portion, after the first main joining step, the weld metal formed in the side welding step, and the first It is preferable to make the plasticization area | region formed in this bonding process and the said 2nd bone bonding process contact.

According to this joining method, after performing a side welding process on the abutment part exposed to the side surface of a to-be-joined metal member, the plasticization area | region formed in the 1st main joining process and the 2nd main joining process with the weld metal formed in the side welding process. Touch Thereby, since the interface of a to-be-joined metal member and a weld metal can be friction-stirred, the airtightness and water tightness of a to-be-joined metal member can be improved.

Moreover, in the said side welding process, it is preferable to fill the said recessed metal in the recessed groove formed along the said butt part in the side surface of the said to-be-joined metal member. According to this joining method, by filling the weld metal into the concave groove formed along the butt portion, the filling operation of the weld metal can be easily performed, and the unfired region can be reliably covered with the weld metal.

Moreover, it is preferable that the width | variety of the said recessed groove is smaller than the width | variety of the plasticization area | region formed in the said 1st bone bonding process and the said 2nd bone bonding process. According to such a joining method, the plasticizing region can be brought into contact with the weld metal, and the range for filling the weld metal can be made small, thereby improving work efficiency.

Moreover, it is preferable that the said recessed groove is provided with the extended recessed groove extended continuously in the center direction of a to-be-joined metal member. According to such a joining method, since the welding length can be increased, the strength of the joining site can be further increased.

Moreover, this invention is the joining method which performs friction stirring by moving a rotating tool with respect to the to-be-joined metal member formed by making the side surface of a 1st metal member and the end surface of a 2nd metal member, The said 1st metal member and the said 1st 2nd side welding process of welding from the side surface of the to-be-joined metal member with respect to the butt part of a metal member, and a 1st bone which performs friction stir from the surface of the to-be-joined metal member with respect to the said butt | bonded part after the said side welding process. And a welding metal formed in the side welding step, including a second main joining step of performing friction stir from the back surface of the joined metal member to the butt portion after the joining step and the first main joining step. It is characterized by contacting the plasticized region formed in the first bone bonding step and the second bone bonding step.

According to this joining method, after performing a side welding process on the abutment part exposed to the side surface of a to-be-joined metal member, the plasticization area | region formed in the 1st main joining process and the 2nd main joining process with the weld metal formed in the side welding process. Touch Thereby, since the interface of a to-be-joined metal member and a weld metal can be friction-stirred, the airtightness and water tightness of a to-be-joined metal member can be improved.

Moreover, in this invention, it is preferable that the said side welding process fills the said weld metal in the recessed groove formed along the said butt part in the side surface of the end surface of the said 2nd metal member. According to this joining method, by filling the weld metal into the concave groove formed along the butt portion, the filling operation of the weld metal can be easily performed, and the unfired region can be reliably covered with the weld metal.

Moreover, it is preferable that the width | variety of the said recessed groove is smaller than 1/2 of the width | variety of the plasticization area | region formed in the said 1st bone bonding process and the said 2nd bone bonding process. According to such a joining method, the plasticizing region can be brought into contact with the weld metal, and the range for filling the weld metal can be made small, thereby improving work efficiency.

It is preferable that the said recessed groove is provided with the extended recessed groove extended continuously in the center direction of the said 2nd metal member. According to such a joining method, since the welding length can be increased, the strength of the joining site can be further increased.

Moreover, it is preferable to include the provisional bonding process which performs a temporary bonding with respect to the said butt part, before performing at least one of the said 1st main bonding process and the said 2nd main bonding process. According to such a joining method, spreading at the time of performing a 1st main joining process and a said 2nd main joining process can be prevented.

Moreover, after the said side welding process, it is preferable to cut out the part which protruded from the said side surface of the to-be-joined metal member among the said weld metals. According to the manufacturing method of such a joined structure, by cutting out the weld metal which protruded from the side surface of a joined structure, the finishing surface of a joined structure can be shape | molded smoothly.

Moreover, it is preferable to form a preliminary hole in advance at the insertion position of the said rotary tool. According to this joining method, the press-in resistance at the time of press-in a rotary tool can be reduced. Thereby, the precision of friction stir welding can be improved, and a joining operation can be performed quickly.

Moreover, this invention is a manufacturing method of the joining structure formed by making the end surface of a 1st metal member and the 2nd metal member abut, and it is the joint structure of the said joining structure with respect to the butt | matching part of a said 1st metal member and a said 2nd metal member. A side welding step of welding from a side surface, a first main joining step of performing friction stir from a surface of the joining structure to abutment portions of the first metal member and the second metal member using a rotating tool, and the And a second bone bonding step of performing friction stirring with respect to the butt portion of the first metal member and the second metal member using a rotating tool from the back surface of the bonding structure, wherein the first bone bonding step and the second bone bonding step are performed. In the present joining step, the metal hole for filling is filled into the empty hole formed when the rotary tool is released, and the joining structure and the metal filling member are fitted. The dam part is characterized by performing a repair step of performing friction stir using a rotary tool.

In the repair process of the manufacturing method of such a joining structure, the empty hole formed in the end position of friction stirring is filled by filling the empty hole of a rotating tool with the filling metal member, and the fall of the strength of the joining site by an empty hole is prevented. can do. That is, the end position of friction stirring can be provided in a joining structure. Thereby, since the tab material for setting the end position of friction stirring can be omitted, the number of steps in the joining operation can be reduced.

In the repairing step, the abutment portion of the joining structure and the filling metal member is frictionally agitated, and the joining structure and the filling metal member are kneaded together at the abutting portion, so that the airtightness and water tightness at the joining portion of the metal members are combined. Can be improved.

Moreover, in the said side welding process, it welds in the said recessed groove by welding from the side surface of the said joining structure with respect to the recessed groove formed in the side surface of at least one end surface of the said 1st metal member and the said 2nd metal member. It is preferable to fill the metal.

According to the method of manufacturing the joined structure, by filling the concave groove formed along the butt portion, the weld metal can be easily filled and the unfired region can be reliably covered with the weld metal.

Moreover, it is preferable to perform the temporary joining process of temporarily joining the butt | matching part of a said 1st metal member and a said 2nd metal member before a said 1st main joining process and a said 2nd main joining process. According to the manufacturing method of such a joined structure, spreading at the time of performing a 1st main joining process and a said 2nd main joining process can be prevented.

Moreover, it is preferable to form a preliminary hole in advance in the insertion planned position of a rotary tool in the said 1st bone joining process and the said 2nd bone joining process. According to the manufacturing method of such a joined structure, the press-in resistance at the time of press-in a rotating tool can be reduced. Thereby, the precision of friction stir welding can be improved, and a joining operation can be performed quickly.

Moreover, it is preferable to fill a weld metal in the empty hole formed at the time of leaving a rotating tool in the said maintenance process. According to the method of manufacturing such a bonded structure, by filling and filling a weld metal into a hollow hole formed when the rotary tool is released in the repair process, it is possible to prevent a decrease in strength of the bonded portion due to the hollow hole and It can be finished flat.

Moreover, it is preferable to overlap a part of the plasticization area | region formed in the said 1st main bonding process, and the plasticization area | region formed in the said 2nd main bonding process. According to the manufacturing method of such a bonded structure, since it overlaps a part of the plasticization area | region formed in the 1st joining process and the 2nd joining process, it is plasticized to the inside of a joining structure, and therefore the airtightness and water tightness in the joining part of metal members are joined. Can be improved.

In addition, the present invention provides a friction by moving a rotating tool to a joined metal member formed by inserting a joint member into a hollow portion formed by abutting a first metal member and a second metal member having the concave portions at the end faces. A joining method for stir welding, wherein abutting portions of the first metal member and the second metal member, abutting portions of the joint member and the first metal member, and abutting portions of the joint member and the second metal member are provided. First main joining step of performing friction stir from the surface of the metal member to be joined, abutting portion of the first metal member and the second metal member, abutting portion of the joint member and the first metal member, and the joint member And a second main joining step of performing friction stir from the back surface of the joined metal member to the butt portion of the second metal member, and the first metal member. With respect to the butt portion of the second metal member it is characterized in that it comprises the side to be bonded welding step of carrying out welding from the side of at least either one of the metal members.

According to this joining method, friction agitation is performed from the front and rear surfaces of the abutment portion of the first metal member and the second metal member of the metal member to be joined and the abutment portion of the joint member and the pair of metal members. Rather, the distance of friction stir can be secured longer. Thereby, the joining strength of the to-be-joined metal member can be raised. Moreover, since welding is performed with respect to the butt | matching part which appears in the side surface of a to-be-joined metal member, the watertightness and airtightness of a to-be-joined metal member can be improved.

The present invention also provides a joined metal member formed by inserting a joint member into a hollow portion formed by abutting a first metal member having a recessed portion at an end face and a second metal member having a recessed portion at a side face at the end face and the side face. Is a joining method of moving the rotary tool to perform friction stir welding, wherein the joining portion of the first metal member and the second metal member, the joining portion of the joint member and the first metal member, the joint member, and the first 1st main joining process which performs friction stir from the surface of the said to-be-joined metal member with respect to the butted part of 2 metal member, and the butted part of the said 1st metal member and said 2nd metal member, the said joint member, and said 1st metal 2nd bone which performs friction stirring from the back surface of the said to-be-joined metal member with respect to the butt part of a member, and the butt | part of a said joint member and a said 2nd metal member. And a side welding step of welding from at least one of the side surfaces of the joined metal member to the butt portion between the first metal member and the second metal member.

According to such a joining method, friction agitation is performed from the front and rear surfaces of the abutment portion of the first metal member and the second metal member of the metal member to be joined, and the abutment portion of the joint member and the pair of metal members, and thus, compared with the prior art. The distance of friction stirring can be ensured for a long time. Thereby, the joining strength of the to-be-joined metal member can be raised. Moreover, since welding is performed with respect to the butt | matching part which appears in the side surface of a to-be-joined metal member, the watertightness and airtightness of a to-be-joined metal member can be improved.

Moreover, in the said side welding process, it is preferable to perform welding over the whole unbaked area | region between the plasticization area | region formed in the said 1st main bonding process, and the plasticization area | region formed in the said 2nd main bonding process.

According to such a joining method, since the butt | matching part which appears on the side surface of a to-be-joined metal member can be sealed over the whole, watertightness and airtightness can further be improved.

Moreover, in the said side welding process, it is preferable to form a recessed groove along the butt | interval part which appears in the said side surface of the said to-be-joined metal member, and to fill the said recessed groove with a weld metal. According to this joining method, by filling the weld metal into the concave groove formed along the butt portion, the filling operation of the weld metal can be easily performed, and the unfired region can be reliably covered with the weld metal.

In addition, a tab member arrangement step including a first tab member and a second tab member on both sides of the joined metal member before the first main bonding step or the second main bonding step, and the joined metal member and the first tab. Butt portion of the ash, butt portion of the first metal member and the second metal member, butt portion of the joint member and the first metal member, butt portion of the joint member and the second metal member, the metal member to be joined And a temporary joining step of performing friction stir with respect to the butt portion of the second tab member.

According to this joining method, since the start position or end position of a 1st bone joining process and a 2nd bone joining process can be set on a tab material, the trace of friction stirring can be set easily. In addition, by performing the temporary bonding step, it is possible to prevent the opening of each member when performing friction stirring.

In addition, the present invention provides a step of joining the stepped portions of a pair of metal members including a stepped portion having a thickness smaller than that of the main body portion to form a butting recess between the main body portions, and the buttock recessed portion. The joint member arrangement process of arranging a joint member in a part, and the body part of one said metal member and the joint part of the said joint member, and the body part of the other said metal member, and the butt | matching part of the said joint member The surface main joining step of performing friction stir from above, the back surface main joining step of carrying out friction stir from the back surface with respect to the abutment portions of the stepped portions, and welding from the side surface to the abutment portion of the pair of the metal member and the joint member. The side surface welding process which performs the process, In the said side welding process, The table formed in the said surface bone joining process The unbaked region between the surface side plasticized region and the back side plasticized region formed in the back surface main bonding step is covered with a weld metal.

In addition, the present invention provides a joint member insertion step of abutting a pair of metal members having a recessed portion at an end face at the end face, and inserting a joint member into a hollow portion formed by the recessed portion. The surface main joining process which performs friction stirring from the surface with respect to the butt part of a metal member, The back surface bonding process which performs friction stirring from the back surface with respect to the butt part of a pair of said metal member, A pair of said metal member and said And a side welding step of welding from the side surface to the butt portion of the joint member, wherein the side welding step includes a front side plasticization region formed in the surface main bonding step and a back side plasticization formed in the back main bonding step. The unfired region between the regions is covered with a weld metal.

According to this joining method, the unfired region can be covered by welding from the side surface to the butt portion exposed to the side surface of the pair of metal members to overlap the weld metal and the surface side plasticized region and the back side plasticized region. . Thereby, the airtightness and watertightness between the side surfaces of a pair of metal member can be improved.

Moreover, in the joining method concerning Claim 35, it is preferable that the said surface side plasticization area | region and the said back surface side plasticization area | region contact with the said joint member. According to this joining method, the butt part exposed to the side surface of a metal member can be sealed reliably.

And a concave groove forming step of forming a concave groove along an abutment portion of the pair of the metal member and the joint member before the side welding step, wherein the weld metal is applied to the concave groove in the side welding step. It is preferable to fill.

According to this joining method, by filling the weld metal into the concave groove formed along the butt portion, the filling operation of the weld metal can be easily performed, and the unfired region can be reliably covered with the weld metal.

Moreover, it is preferable that the width | variety of the said recessed groove formed in the said surface side plasticization area | region and the said back side plasticization area | region is smaller than the width | variety of the said surface side plasticization area | region and the said back surface side plasticization area | region. According to such a joining method, the plasticizing region can be brought into contact with the weld metal, and the range for filling the weld metal can be made small, thereby improving work efficiency.

Moreover, after the said side welding process, it is preferable to cut out the part which protruded from the side surface of the said metal member among the said weld metals. According to this joining method, the finishing surface of a metal member can be shape | molded smoothly by cutting out the weld metal which protruded from the side surface of a metal member.

Moreover, it is preferable to form a preliminary hole in advance in the insertion planned position of the rotating tool used by the said friction stirring. According to this joining method, the press-in resistance at the time of press-in a rotary tool can be reduced. Thereby, the precision of friction stir welding can be improved, and a joining operation can be performed quickly.

According to the joining method and the manufacturing method of the joining structure which concern on this invention, the airtightness and watertightness of the joined metal member can be improved.

1: is a figure which shows the bonding method which concerns on 1st Embodiment, (a) is a perspective view, (b) is an enlarged perspective view in the N part of (a).
FIG. 2: is a figure which shows the (1) 1st preparation process which concerns on 1st Embodiment, (a) is a perspective view, (b) is a top view.
FIG. 3 is a view showing (1) a first preparation step according to the first embodiment, (a) is a sectional view taken along line II of FIG. 2 (b), and (b) is II- of FIG. 2 (b). It is sectional drawing of line II.
It is a figure which shows a rotating tool, (a) is a side view of the temporary welding rotary tool, (b) is a side view of this rotating tool for joining.
FIG. 5 is a view showing a state of use of the temporary welding rotary tool according to the first embodiment, (a) is a diagram in which the temporary welding rotary tool is brought into contact with the second tab member, and (b) is a temporary welding rotation. It is a figure which pressed the tool into the 2nd tab material.
FIG. 6: is a top view which shows the 2nd tab material bonding process of the 1st preliminary process which concerns on 1st Embodiment, the provisional bonding process, and the 1st tab material bonding process.
FIG. 7: is sectional drawing which showed the 1st main bonding process which concerns on 1st Embodiment in the direction of the III-III arrow of FIG. 6, (a) is a starting position part, (b) is an intermediate part, (c) is an ending position It is a figure which shows the friction stir welding of a part.
FIG. 8: (a) is sectional drawing toward the 1st metal member side from the butt | matching part J1 after the 2nd preparation process which concerns on 1st Embodiment. FIG. 8B is a plan view illustrating the first tab material bonding step, the temporary bonding step, and the second tab material bonding step of the second preparation step according to the first embodiment.
FIG. 9 is a cross-sectional view taken along the line IV-IV of FIG. 8B showing a second main bonding step according to the first embodiment, (a) is a starting position portion, and (b) is a friction stir welding of an intermediate portion. Figure is shown.
It is a perspective view which shows the to-be-joined metal member after the tab material cutting process which concerns on 1st Embodiment.
11 is a perspective view showing a concave groove forming step according to the first embodiment.
It is a figure which shows the side welding process which concerns on 1st Embodiment, (a) is a front view seen from the 2nd side surface side, (b) is sectional drawing seen from the VV arrow direction of (a).
It is a figure which shows the bonding method which concerns on 2nd Embodiment, (a) is a perspective view, (b) is sectional drawing seen from the VI-VI arrow direction of (a).
It is a perspective view which shows the bonding structure bonded by the manufacturing method of the bonding structure which concerns on 3rd Embodiment.
FIG. 15 is a view showing a butt process according to a third embodiment, (a) is a perspective view of a first metal member and a second metal member, but (b) abuts the first metal member and the second metal member. The following is a perspective view.
It is a perspective view which shows the tab material arrangement | positioning process in the 1st main bonding process which concerns on 3rd Embodiment.
It is a figure which shows the use condition of the rotating tool which concerns on 3rd Embodiment, (a) is a side view when a rotating tool is contacted with a tab material, (b) is a side view when the rotating tool is press-fitted into a tab material. .
FIG. 18 is a plan view illustrating the main bonding step in the first main bonding step of the third embodiment. FIG.
It is a perspective view which shows the bonding structure in the state which removed the tab material after finishing the 2nd main bonding process of 3rd Embodiment.
It is a perspective view which shows the recessed groove formation process of 3rd Embodiment.
It is a perspective view which shows the groove part formation process in the recessed groove welding process of 3rd Embodiment.
It is a perspective view which shows the weld metal filling process in the recessed groove welding process of 3rd Embodiment.
It is a perspective view which shows the joint member insertion process of 3rd Embodiment.
It is a perspective view which shows the tab material arrangement process in the 3rd main joining process of 3rd Embodiment.
FIG. 25 is a plan view illustrating the main bonding step in the third main bonding step according to the third embodiment. FIG.
It is a perspective view which shows the groove part formation process in the side welding process of 3rd Embodiment.
It is a figure which shows the bonding method which concerns on 4th embodiment, (a) is a perspective view, (b) is an enlarged perspective view in N part of (a).
It is a figure which shows the butt | matching process which concerns on 4th Embodiment, (a) is a perspective view, (b) is a top view.
It is a figure which shows the 1st side welding process which concerns on 4th Embodiment, (a) is a front view in the 1st side of a to-be-joined metal member, (b) is the II line cross section of (a). .
It is a figure which shows the tab material arrangement process which concerns on 4th Embodiment, (a) is a perspective view, (b) is a top view.
It is a top view which shows the 1st main bonding process which concerns on 4th Embodiment.
FIG. 32 is a view showing a fifth embodiment, (a) is a perspective view, and (b) is a sectional view taken along the line II-II of (a). FIG.
33 is a perspective view illustrating a bonding method according to a sixth embodiment.
It is a perspective view which shows the butt | matching process which concerns on 6th Embodiment.
It is a figure which shows the side welding process which concerns on 6th Embodiment, (a) is a perspective view, (b) is a top view.
It is a perspective view which shows the tab material arrangement process which concerns on 6th Embodiment.
It is a top view which shows the 1st main bonding process which concerns on 6th Embodiment.
38A and 38B are perspective views showing a modification of the concave groove according to the sixth embodiment.
It is a perspective view which shows the bonding structure bonded by the manufacturing method of the bonding structure of 7th Embodiment.
40 is a diagram illustrating a butt step in a seventh embodiment, wherein (a) is a perspective view before abutting the first metal member and the second metal member, and (b) is a view after abutting the first metal member and the second metal member. Perspective view.
It is a figure which shows the side welding process of 7th Embodiment, and is a perspective view after filling a weld metal in a recessed groove.
FIG. 42 is a view showing a state of use of the temporary welding rotary tool of the seventh embodiment, (a) is a side view when the temporary welding rotary tool is brought into contact with a weld metal, and (b) is a temporary welding rotary tool; Is the side view at the time of press-fitting into the weld metal.
It is a top view which shows the provisional bonding process in the 1st main bonding process of 7th Embodiment.
FIG. 44 is a plan view illustrating the main bonding step in the first main bonding step of the seventh embodiment. FIG.
FIG. 45 is a diagram showing the respective steps of the seventh embodiment, (a) and (b) are II sectional views of FIG. 44 showing the main bonding step in the first main bonding step, and (c) is the first view. It is sectional drawing which shows the filling metal member insertion process in a repair process.
It is a top view which shows the repair bonding process in the 1st repair process of 7th Embodiment.
It is a figure which shows the repair welding process in the 1st repair process of 7th Embodiment, and is sectional drawing II-II of FIG.
It is a side sectional view which shows the 2nd main joining process and the 2nd repair process of 7th Embodiment.
49 is a plan view illustrating a modification of the seventh embodiment.
50 is an overall perspective view illustrating the metal member to be joined according to the eighth embodiment.
FIG. 51 is a view showing a first metal member, a second metal member, and a joint member according to an eighth embodiment, (a) is a perspective view, and (b) is a plan view.
It is a perspective view which shows the tab material arrangement process which concerns on 8th Embodiment.
It is a top view which shows the provisional bonding process which concerns on 8th Embodiment.
It is a top view which shows the 1st main bonding process which concerns on 8th Embodiment.
55 is a perspective view illustrating a concave groove forming step according to an eighth embodiment.
Fig. 56 is a partially perspective front view showing the side welding step according to the eighth embodiment.
Fig. 57 is an overall perspective view showing the metal member to be joined according to the ninth embodiment.
FIG. 58 is a view showing a first metal member, a second metal member, and a joint member according to the ninth embodiment, (a) is a perspective view, and (b) is a plan view.
Fig. 59 is a perspective view illustrating a tab material arrangement step according to the ninth embodiment.
It is a top view which shows the provisional bonding process which concerns on 9th Embodiment.
It is a top view which shows the provisional bonding process which concerns on 9th Embodiment.
62 is a plan view illustrating a first main bonding step according to the ninth embodiment.
FIG. 63 is a view showing a concave groove forming step according to a ninth embodiment, (a) is a perspective view, and (b) is a plan view.
It is a figure which shows the side welding process which concerns on 9th Embodiment, (a) is a perspective view, (b) is a front view seen from the arrow direction of (a).
65 is a plan view illustrating a modification of the ninth embodiment.
66 is an overall perspective view illustrating a bonding method according to a tenth embodiment.
FIG. 67 is a view showing a first metal member, a second metal member and a tab member according to the tenth embodiment, (a) is a perspective view, (b) is a plan view, (c) is a sectional view taken along line II of (b), (d) is sectional drawing of the II-II line | wire of (b).
It is a top view which shows the 1st step part provisional bonding process which concerns on 10th Embodiment.
FIG. 69 is a cross-sectional view taken along the line III-III of FIG. 68 showing the first step difference bonding process according to the tenth embodiment, where (a) is an intermediate point and (b) is an end point.
70 is a perspective view illustrating a joint member arrangement process according to the tenth embodiment, (a) is an exploded view, and (b) is a layout view.
FIG. 71: is a figure which shows the joint member arrangement process which concerns on 10th Embodiment, (a) is a top view, (b) is sectional drawing of the IV-IV line of (a).
72 is a plan view illustrating a surface provisional bonding step according to the tenth embodiment.
73 is a plan view showing the surface-bonding step according to the tenth embodiment.
It is a top view which shows the back surface main bonding process which concerns on 10th Embodiment.
75 is a side view illustrating a recess groove forming process according to a tenth embodiment.
It is a figure which shows the weld metal filling process which concerns on 10th Embodiment, (a) is a side view, (b) is sectional drawing of the VV line of (a).
77 is an overall perspective view illustrating a bonding method according to an eleventh embodiment.
78 is a view showing a first metal member, a second metal member, and a joint member according to an eleventh embodiment, (a) is an exploded perspective view, and (b) is a side view.
79 is a view showing the metal member to be joined and the tab member according to the eleventh embodiment, (a) is a perspective view, and (b) is a plan view.
80 is a plan view illustrating the surface provisional bonding step according to the eleventh embodiment.
FIG. 81 is a cross-sectional view taken along the line VI-VI in FIG. 80 showing the surface-bonding process according to the eleventh embodiment, (a) shows a starting point, (b) shows an intermediate point, and (c) shows an end point.
It is a figure which shows the back temporary bonding process which concerns on 11th Embodiment, (a) is sectional drawing, (b) is top view.
FIG. 83 is a sectional view taken along line VII-VII of FIG. 82 showing the back surface bonding process according to the eleventh embodiment, (a) shows a starting point, and (b) shows an intermediate point.
It is a perspective view which shows the state which cut out the tab material after the back surface main bonding process which concerns on 11th Embodiment.
85 is a perspective view illustrating a concave groove forming process according to an eleventh embodiment.
FIG. 86 is a view showing a weld metal filling step according to an eleventh embodiment, (a) is a side view, and (b) is a VII-VII line sectional view of (a). FIG.
87 is a perspective view illustrating a modification according to the eleventh embodiment.
88 is a perspective view showing a conventional bonding method in which friction stir welding is performed on a pair of metal members.
89 is a cross-sectional view showing a conventional joining method in which friction stir welding is performed between a pair of metal members via a joint member.
FIG. 90 is a view showing a conventional joining method in which friction stir welding is performed on a joined metal member in which a joint member is inserted into a hollow portion formed between a pair of metal members, (a) before (b) Shows after bonding.
It is a perspective view which shows the joining method which carried out the friction stir welding to a pair of large metal member.

[First Embodiment]

In the joining method according to the first embodiment of the present invention, as shown in FIG. 1A, the joined metal member 1 formed by abutting the first metal member 1a and the second metal member 1b. The front surface A and the rear surface B of the s) are joined by friction stir, and both sides of the metal member 1 to be joined are concave grooves K as shown in FIG. After this, the padding welding is performed on the concave groove K.

First, the to-be-joined metal member 1 of the joining method which concerns on this embodiment is demonstrated in detail, and the 1st tab material 2 and the 2nd tab material 3 used when joining this to-be-joined metal member 1 are mentioned. ) Will be described in detail.

As shown in (a) and (b) of FIG. 2, the to-be-joined metal member 1 is a rectangular first metal member 1a and second metal member 1b as seen in the cross section in this embodiment. The abutment part J1 is formed by abutting each end surface. The 1st metal member 1a and the 2nd metal member 1b are metal materials of the same composition in this embodiment, For example, aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy The friction material is made of a metal material. Although there is no restriction | limiting in particular in the shape and dimension of the 1st metal member 1a and the 2nd metal member 1b, It is preferable to make the thickness dimension in the butt | matching part J1 the same at least.

In addition, as shown in FIG. 1, the surface of the to-be-joined metal member 1 is surface A, the back surface B, the one side 1st side C, and the other side 2nd side ( It is called D). In addition, up, down, left, and right in front and back in this embodiment follow the arrow of FIG.

The first tab member 2 and the second tab member 3 are disposed so as to sandwich the butt portion J1 of the metal member 1 to be joined as shown in FIGS. 2A and 2B. The joints (boundary lines) of the first metal member 1a and the second metal member 1b, which are respectively attached to the joined metal member 1 and appear on the first side surface C and the second side surface D, Cover it up. Although there is no restriction | limiting in particular in the material of the 1st tab material 2 and the 2nd tab material 3, In this embodiment, it is formed with the metal material of the same composition as the metal member 1 to be joined. The shape and dimensions of the first tab member 2 and the second tab member 3 are not particularly limited, but in the present embodiment, the thickness of the metal member 1 to be joined in the abutting portion J1 is measured. It is made the same as a dimension.

Next, with reference to FIG. 4, the rotation tool F (henceforth "rotation tool F for temporary joining") used for a temporary joining process, and the rotation tool G (henceforth for a main joining process) (following) , The "rotation tool G for this joining" will be described in detail.

The temporary joining rotary tool F shown in Fig. 4A is made of a metal material that is harder than the metal member 1 to be joined such as tool steel, and has a shoulder portion F1 having a cylindrical shape, and the shoulder. It is comprised and equipped with the stirring pin (probe) F2 protruded in the lower end surface F11 of the part F1. Although the dimension and shape of the temporary welding rotation tool F may be set according to the material, thickness, etc. of the to-be-joined metal member 1, the rotation tool for bone joining used by the 1st main joining process demonstrated later at least ( It is smaller than G) (see Fig. 4B). In this case, provisional welding can be performed at a load smaller than that of the present joint, so that the load applied to the friction stirring device at the time of provisional welding can be reduced, and the moving speed (feed speed) of the rotational tool F for provisional welding can be reduced. Since it becomes possible to make it faster than the moving speed of this joining rotary tool G, the working time and cost required for provisional joining can be reduced.

The lower end surface F11 of the shoulder part F1 is a site | part which plays a role which prevents scattering to the circumference by pressing the plastically fluidized metal, and is molded in concave shape in this embodiment. Particular limitation to the size of the outer diameter (X ₁₎ of the shoulder portion (F1), but, in the present embodiment is smaller than the outer diameter (Y ₁₎ of the shoulder portion (G1) of the rotating tool (G) for the junction.

The stirring pin F2 hangs from the center of the lower end surface F11 of the shoulder part F1, and is shape | molded by the truncated truncated cone shape in this embodiment. Moreover, the stirring blade engraved in helical shape is formed in the circumferential surface of the stirring pin F2. It stirred There are no particular limitations on the size of the outer diameter of the pin (F2), the maximum outer diameter of the stirring pins (G2) of the maximum outer diameter (top end diameter) rotating tool (G) for the (X ₂₎ is the joint in this embodiment (the upper end diameter (Y ₂ ) is smaller than the minimum outer diameter (lower end diameter) X ₃ and smaller than the minimum outer diameter (lower end diameter) Y ₃ of the stirring pin G2. The length (L ₂₎ of the stirring pins (F2), the length of the stirring pins (G2) of the joining rotation tool (G) for (L ₁₎ [in Fig. 4 (b), see] it is preferably smaller than that.

This bonding rotation tool G shown in FIG.4 (b) consists of a metal material harder than the to-be-joined metal member 1, such as tool steel, and has the shoulder part G1 which shows a cylindrical shape, and this shoulder It is comprised and equipped with the stirring pin (probe) G2 protruding in the lower end surface G11 of the part G1.

The lower end surface G11 of the shoulder part G1 is shape | molded in concave shape similarly to the rotation tool F for provisional welding. The stirring pin G2 hangs from the center of the lower end surface G11 of the shoulder part G1, and is shape | molded by the truncated truncated cone shape in this embodiment. Moreover, the stirring blade engraved in helical shape is formed in the peripheral surface of stirring pin G2.

Hereinafter, the bonding method which concerns on this embodiment is demonstrated in detail. The joining method which concerns on this embodiment is (1) 1st preparation process, (2) 1st preliminary process, (3) 1st main bonding process, (4) 2nd preparation process, (5) 2nd preliminary process, (6) 2nd main joining process, (7) tab material cutting process, (8) concave groove formation process, (9) side welding process, and (10) padding part cutting process.

In addition, as shown in FIG. 1, (2) 1st preliminary process and (3) 1st main joining process are processes performed on surface A, (5) 2nd preliminary process, and (6) The second main bonding step is a step performed on the back surface B. FIG. In addition, (8) concave groove formation process, (9) side welding process, and (10) padding part cutting process are processes performed in both surfaces of 1st side surface C and 2nd side surface D. As shown in FIG.

(1) 1st preparation process

A first preparation step will be described with reference to FIGS. 2 and 3. The 1st preparation process is a process of preparing the prediction member (1st tap material 2 and 2nd tap material 3) in which the start position and end position of friction stirring of the to-be-joined metal member 1 are provided. In this embodiment, a 1st preparation process is a 1st process which abuts the 1st metal member 1a and the 2nd metal member 1b, and 1st in both sides of the abutting part J1 of the to-be-joined metal member 1, A tab member arrangement step of arranging the tab member 2 and the second tab member 3, and a tack welding step of temporarily joining the first tab member 2 and the second tab member 3 to the metal member 1 to be joined by welding. Equipped with.

(1-1) Butt Process

In the butt step, as shown in FIG. 2B, the end face 11b of the second metal member 1b is brought into close contact with the end face 11a of the first metal member 1a. In addition, as shown in FIG. 3 etc., the surface 12a of the 1st metal member 1a and the surface 12b of the 2nd metal member 1b are made into the surface of the same height, and the 1st metal member 1a is also made. The back surface 13a of () and the back surface 13b of the 2nd metal member 1b are made into the surface of the same height. In addition, similarly, the 1st side surface 14a of the 1st metal member 1a and the 1st side surface 14b of the 2nd metal member 1b are made into the surface of the same height, and the 1st side of the 1st metal member 1a The 2nd side surface 15a and the 2nd side surface 15b of the 2nd metal member 1b are made into the surface of the same height.

That is, the surface A is formed of the surface 12a of the first metal member 1a and the surface 12b of the second metal member 1b, and the back surface B is the back surface of the first metal member 1a. 13a and the back surface 13b of the second metal member 1b, wherein the first side surface C is formed of the first side surface 14a and the second metal member 1b of the first metal member 1a. The first side 14b is formed, and the second side D is formed of the second side 15a of the first metal member 1a and the second side 15b of the second metal member 1b.

(1-2) Tap Repositioning Process

In the tab member arrangement step, as shown in FIG. 2B, the first tab member 2 is brought into contact with the first side surface C along the butt portion J1. Moreover, the 2nd tab material 3 is made to contact the 2nd side surface D side along the butt | matching part J1. At this time, as shown in FIG.3 (b), the surface 22 of the 1st tab member 2 and the surface 32 of the 2nd tab member 3 are made into the surface A of the metal member 1 to be joined. The surface having the same height as the surface of the first tab member 2 and the rear surface 23 of the second tab member 3 are flush with the rear surface B of the metal member 1 to be joined. It is done.

(1-3) Temporary Bonding Process

In the tack welding step, as shown in FIGS. 2A and 2B, the corners 2a and 2b formed by the joined metal member 1 and the first tab member 2 are welded and avoided. The joining metal member 1 and the first tab member 2 are temporarily joined. Moreover, the corner part 3a, 3b formed by the to-be-joined metal member 1 and the 2nd tab material 3 is welded, and the to-be-joined metal member 1 and the 2nd tab material 3 are temporarily joined.

Moreover, welding may be performed continuously over the full length of the indented corner | angular part 2a, 2b and 3a, 3b, and may be interrupted and welded. In addition, in the 1st preparation process, when abbreviate | omitting a welding process, you may perform the butt process and the tab material arrangement process on the mount of a friction stirring apparatus not shown.

(2) first preliminary step

The 1st preliminary process is a process performed before a 1st main joining process, and in this embodiment, the abutting part J3 of the to-be-joined metal member 1 and the 2nd tab material 3 on the surface A side. (2-1) second tab material joining step of joining the part, (2-2) provisional joining step of temporarily joining the butt portion J1 of the metal member 1 to be joined, and the metal member 1 to be joined (2-3) Forming a Preliminary Hole at the Starting Position of Friction Stirring in the First Tab Material Bonding Step and the First Main Bonding Step (2-3) to Join the Butting Part J2 of the First Tab Material 2 (2-4) ) A preliminary hole forming step is provided.

In the first preliminary step, as shown in FIG. 6, one temporary welding rotary tool F is moved to form a movement trajectory (bead) of one brush drawing, and is joined to the abutting parts J3, J1, and J2. Friction stirring is performed continuously. That is, to the end position E _P1 without detaching the stirring pin F2 (refer FIG. 4 (a)) of the temporary welding rotary tool F inserted in the starting position S _P1 of friction stirring in the middle. Move it. In addition, in this embodiment, although the starting position S _P1 of friction stirring is provided in the 2nd tab material 3 and the ending position E _P1 is provided in the 1st tap material 2, the starting position S _P1 It is not intended to limit the positions of the and end positions E _P1 . In addition, in this embodiment, all the rotational directions of the temporary welding rotary tool F and this bonding rotary tool G shall perform right rotation. Thus, the labor of work can be reduced by unifying the rotation direction of the temporary welding rotary tool F and this bonding rotary tool G.

The order of friction stirring in the 1st preliminary process of this embodiment is demonstrated in detail with reference to FIG. 5 and FIG.

First, the to-be-joined metal member 1 which performed the tack welding process is fixed to the mount of a friction stirring apparatus which is not shown in figure. And as shown in FIG. 5 (a), the second taepjae (3) is directly above the starting position (S _P1) installed in place by placing a joint rotation tool (F) for, and subsequently the bond of It moved down while the right rotary tool (F) is pressed against the pin stirring the starting position (F2) (S _P1). Although the rotational speed of the temporary welding rotary tool F is set according to the dimension and shape of the stirring pin F2, the material, thickness, etc. of the to-be-joined metal member 1, which are friction-stirred, most are 500-2000 ( rpm).

When the stirring pin F2 contacts the surface 32 of the 2nd tab material 3, the metal around the stirring pin F2 plasticizes and fluidizes by frictional heat, as shown in FIG.5 (b). , The stirring pin F2 is inserted into the second tab member 3.

When the whole of the stirring pin F2 enters the 2nd tap material 3, and the whole surface of the lower end surface F11 of the shoulder part F1 contacts the surface 32 of the 2nd tap material 3, FIG. As shown in the figure, while rotating the temporary joining rotary tool F, the relative movement is made toward the starting point s3 of the second tab member joining step.

The moving speed (feeding speed) of the rotational tool F for provisional joining is set according to the dimension and shape of the stirring pin F2, material, thickness, etc. of the to-be-joined metal member 1 etc. which are friction-stirred, but most are It is set in the range of 100-1000 (mm / min). The rotational speed at the time of the movement of the temporary welding rotary tool F is the same as the rotational speed at the time of insertion, or it is made slower than that. In addition, when moving the temporary welding rotary tool F, you may incline the axis line of the shoulder part F1 to the rear side of a traveling direction with respect to a perpendicular line slightly, but if it sets it to vertical without making it incline, the temporary welding rotary tool F ) Is easy to change the direction of the movement, allowing complex movement. When the temporary joining rotary tool F is moved, the metal around the stirring pin F2 is plastically fluidized one by one, and the metal which was plastically fluidized is hardened again at the position away from the stirring pin F2.

When the rotational welding tool F for temporary welding is relatively moved and friction stirring is performed continuously to the starting point s3 of the second tap material joining process, the second welding member is directly rotated without detaching the temporary welding rotation tool F from the starting point s3. The process moves to the tap material joining process.

(2-1) Second Tab Material Bonding Step

In the second tab member bonding step, friction stirring is performed on the butt portion J3 between the second tab member 3 and the metal member 1 to be joined. Specifically, abutment is made by setting a route of friction stir on the joint (boundary line) of the metal member 1 to be joined and the second tab member 3 and relatively moving the provisional joining rotary tool F along the route. Friction stirring is performed on the portion J3. In addition, in this embodiment, friction stirring is performed continuously from the start point s3 of the 2nd tab material joining process to the end point e3, without leaving the temporary welding rotary tool F in the middle.

Moreover, when rotating the temporary welding rotary tool F to the right, since there exists a possibility that the microcavity may generate | occur | produce on the left side of the advancing direction of the temporary welding rotary tool F, the advancing direction of the temporary welding rotary tool F is carried out. It is preferable to set the position of the start point s3 and the end point e3 of a 2nd tab material joining process so that the to-be-joined metal member 1 may be located to the right side of the. In this case, since a cavity defect is less likely to occur on the side of the metal member 1 to be joined, a high quality joined body can be obtained.

Incidentally, in the case where the temporary rotational rotary tool F is rotated to the left, there is a possibility that a minute cavity defect may occur on the right side of the advancing direction of the temporary rotational rotary tool F, so that the progress of the temporary rotary tool F is advanced. It is preferable to set the positions of the start point and the end point of the second tab member joining step so that the joined metal member 1 is located on the left side of the direction. Although illustration is abbreviate | omitted specifically, the starting point is provided in the position of the end point e3 at the time of turning the temporary welding rotation tool F to the right, and the starting point (s3) when the temporary welding rotation tool F is turned right. It is good to provide an end point at the position of).

Moreover, when the stirring pin F2 of the temporary welding rotary tool F enters the butt | matching part J3, the force which tries to isolate the to-be-joined metal member 1 and the 2nd tab material 3 acts, but Since the corner parts 3a and 3b (refer FIG. 2) formed by the metal member 1 and the 2nd tab material 3 are temporarily joined by welding, the to-be-joined metal member 1 and the 2nd tab material 3 There is no gap between).

(2-2) Temporary Bonding Process

When the temporary welding rotary tool F reaches the end point e3 of the second tap material joining step, the friction stir is continuously performed to the start point s1 of the temporary joining step without terminating the friction agitation at the end point e3, Transfer to the temporary bonding process as it is. That is, friction stirring is continued from the end point e3 of a 2nd tap material joining process to the start point s1 of a provisional bonding process, without leaving | separating the rotational tool F for provisional joining, and rotating at provisional point s1. The process proceeds to the temporary bonding process without detaching the tool (F). This eliminates the need for the detachment work of the temporary joining rotary tool F at the end point e3 of the second tab member joining process, and the rotational tool F of the temporary joining rotation tool F at the start point s1 of the temporary joining process. Since the insertion work becomes unnecessary, it becomes possible to improve the efficiency and speed of the preliminary joining work.

In this embodiment, the route of friction stirring from the end point e3 of the 2nd tap material joining process to the start point s1 of the provisional joining process is set to the 2nd tap material 3, and the rotating tool F for temporary joining is The movement trace at the time of moving from the end point e3 of a 2nd tap material joining process to the start point s1 of a provisional joining process is formed in the 2nd tap material 3. In this case, in the process from the end point e3 of the second tab member joining step to the start point s1 of the provisional joining step, it is difficult for the joint defect to occur in the metal member 1 to be joined, whereby a high quality joined body can be obtained. have.

In the provisional bonding process, friction stir is performed with respect to the butt | matching part J1 (refer FIG. 6) of the to-be-joined metal member 1. Specifically, the route of friction stir is set on the joint (boundary line) of the to-be-joined metal member 1, and the relative length of the butt | matching part J1 is made by relatively moving the rotation tool F for temporary joining along the said route. Friction stirring is performed continuously over. In addition, in this embodiment, friction stirring is performed continuously from the start point s1 of the temporary joining process to the end point e1, without leaving the temporary welding rotary tool F in the middle.

When the rotational welding tool F for temporary joining reaches the end point e1 of a temporary joining process, friction stirring is performed continuously to the start point s2 of a 1st tap material joining process, without ending friction stirring at the end point e1, It transfers to a 1st tap material joining process as it is. That is, friction stir is continued from the end point e1 of the provisional joining process to the start point s2 of the 1st tab material joining process, without leaving the temporary welding rotary tool F, and the rotation for provisional joining at the starting point s2. It moves to a 1st tab material joining process, without leaving the tool F. As shown to FIG.

In this embodiment, the route of friction stirring from the end point e1 of the temporary joining process to the start point s2 of the first tab member joining process is set in the first tab member 2, and the rotary tool F for temporary joining is set. The movement trace at the time of moving from the end point e1 of a provisional bonding process to the start point s2 of a 1st tap material bonding process is formed in the 1st tab material 2. In this way, in the process from the end point e1 of the provisional joining step to the start point s2 of the first tab material joining step, it is difficult for the joint defect to occur in the metal member 1 to be joined, so that a high quality joined body can be obtained. have.

(2-3) First Tab Material Bonding Step

In a 1st tab material joining process, friction stirring is performed with respect to the butt | matching part J2 of the to-be-joined metal member 1 and the 1st tab material 2. Specifically, abutment is made by setting a route of friction stir on the joint (boundary line) of the metal member 1 to be joined and the first tab member 2 and moving the rotational tool F for temporary joining along the route. Friction stirring is performed on the part J2. In addition, in this embodiment, friction stirring is performed continuously from the start point s2 of the 1st tab material joining process to the end point e2, without leaving the temporary welding rotary tool F in the middle.

In addition, since the rotational welding tool F for temporary joining is turned to the right, the starting point s2 of a 1st tap material joining process, and the to-be-joined metal member 1 are located to the right of the advancing direction of the temporary welding rotational tool F, and The position of the end point e2 is set.

Moreover, when the stirring pin F2 of the temporary welding rotary tool F enters the butt | matching part J2, although the force which tries to isolate the to-be-joined metal member 1 and the 1st tab material 2 acts, Since the corner parts 2a and 2b (refer FIG. 2) which entered the metal member 1 and the 1st tab material 2 by welding are temporarily welded, between the to-be-joined metal member 1 and the 1st tab material 2 There is no occurrence of gap in.

When the rotational tool F for provisional welding reaches the end point e2 of a 1st tap material joining process, the end position E _P1 provided in the 1st tap material 2 is not terminated at the end point e2, without stopping friction stirring. Friction stirring is performed continuously until. In addition, in this embodiment, the end position E _P1 is provided on the extension line of the seam (boundary line) shown on the surface A side of the to-be-joined metal member 1. Incidentally, the end position E _P1 is also the starting position S _M1 of friction stirring in the first main joining step described later.

When the temporary joining rotary tool F reaches the end position E _P1 , it raises, rotating the temporary joining rotary tool F, and disengages the stirring pin F2 from the end position E _P1 .

(2-4) preliminary hole forming process

Subsequently, a preliminary hole formation process is performed. As shown in FIG.4 (b), a preliminary hole formation process is a process of forming preliminary hole P1 in the starting position of friction stirring in a 1st main joining process. In the preliminary hole formation process which concerns on a 1st preliminary process, the preliminary hole P1 is formed in the starting position S _M1 set in the surface 22 of the 1st tab material 2.

The preliminary hole P1 is provided in order to reduce the insertion resistance (pressing resistance) of the stirring pin G2 of this bonding rotary tool G, and in this embodiment, stirring of the temporary welding rotary tool F is carried out. The hole H1 formed when the pin F2 (see Fig. 4A) is separated is formed by expanding the diameter with a drill or the like not shown. When the empty hole H1 is used, the formation process of the preliminary hole P1 can be simplified, and work time can be shortened. Although there is no restriction | limiting in particular in the form of preliminary hole P1, In this embodiment, it is set as cylindrical shape. In addition, in this embodiment, although the preliminary hole P1 is formed in the 1st tab material 2, there is no restriction | limiting in particular in the position of the preliminary hole P1, You may form in the 2nd tab material 3, Although it may be formed in J2, J3), it is suitably formed on the extension line of the seam (boundary line) of the to-be-joined metal member 1 appearing on the surface A side of the to-be-joined metal member 1 like this embodiment. It is preferable.

In addition, in this embodiment, the case where the hollow hole H1 of the stirring pin F2 (refer FIG.4 (a)) of the temporary welding rotary tool F is expanded and used as the preliminary hole P1 is illustrated. However, the maximum outer diameter X ₂ of the stirring pin F2 is larger than the minimum outer diameter Y ₃ of the stirring pin G2 of the rotary tool G for this bonding, and the maximum outer diameter X of the stirring pin F2. ₂ ) In the case of (Y ₃ <X ₂ <Y ₂ ) smaller than the maximum outer diameter Y ₂ of the stirring pin G2, the empty hole H1 of the stirring pin F2 is used as the spare hole P1 as it is. You may also

(3) First main bonding step

A 1st main joining process is a process of joining the butt | matching part J1 in the surface A side of the to-be-joined metal member 1 in earnest. In the 1st present joining process which concerns on this embodiment, the metal member to be joined (with respect to the butt | matching part J1 of the temporary joining state using the rotary joining tool G shown in FIG.4 (b)) Friction stirring is performed from the surface A side of 1).

In the 1st main joining process, as shown to (a)-(c) of FIG. 7, the stirring pin (of the rotating tool G for joining) in the preliminary hole P1 formed in the starting position S _M1 ( G2) is inserted (press-in), and the inserted stirring pin G2 is moved to the end position E _M1 without detaching it halfway. That is, in a 1st main joining process, friction stirring is started from the preliminary hole P1, and friction stirring is performed continuously to the end position E _M1 .

Here, when the said 1st preliminary process is complete | finished, the friction stirring apparatus provided with the rotational tool F for provisional joining is immediately above the end position E _P1 of the 1st tab material 2 (refer FIG. 6). Since it is located in, when the start position of a 1st main joining process is set to S _M1 , a 1st main joining process can be performed without moving the friction stirring apparatus provided with the rotation tool G for main joining, and an operation is abbreviate | omitted. can do.

In addition, in this embodiment, although the start position S _M1 of friction stirring is provided in the 1st tab material 2 and the end position E _M1 is provided in the 2nd tab material 3, the start position S _M1 It is not intended to limit the positions of the and end positions E _M1 .

With reference to FIG.7 (a)-(c), a 1st main joining process is demonstrated in detail.

First, as shown to Fig.7 (a), the joining rotary tool G is located directly on the preliminary hole P1 (starting position S _M1 ), and then this joining rotary tool ( G) is lowered while turning right, and the tip of stirring pin G2 is inserted into preliminary hole P1. When the stirring pin G2 enters the preliminary hole P1, the circumferential surface (side surface) of the stirring pin G2 contacts the hole wall of the preliminary hole P1, and metal plasticizes and fluidizes from the hole wall. In this state, the plasticized fluidized metal is pushed out from the circumferential surface of the stirring pin G2, and the stirring pin G2 is press-fitted, thereby reducing the indentation resistance in the initial step of press-fitting. Moreover, before the shoulder part G1 of this rotation tool G for this joining contacts the surface 22 of the 1st tab material 2, the stirring pin G2 contacts the hole wall of the preliminary hole P1, and heat of friction Since this occurs, it is possible to shorten the time until plastic fluidization. That is, the load of the friction stir device can be reduced, and the work time required for this bonding can be shortened.

When the whole of the stirring pin G2 enters the 1st tap material 2, and the whole surface of the lower end surface G11 of the shoulder part G1 contacts the surface 22 of the 1st tap material 2, FIG. As shown in (b), while the friction stir is performed, the joining rotary tool G is relatively moved toward one end of the abutting portion J1 of the metal member 1 to be joined, and the abutting portion J2 ) Is crossed to the butt J1. When the rotary tool G for joining is moved, the metal around the stirring pin G2 will plasticize in turn, and at the position away from the stirring pin G2, the metal which was plasticized and hardened again will harden | cure again, A formation region (hereinafter, referred to as "surface side plasticization region W1") is formed. In addition, the plasticization area shall include both the state heated by frictional heat of the rotary tool and actually plasticized, and the state in which the rotary tool has passed excessively and returned to normal temperature.

Although the moving speed (feeding speed) of this joining rotary tool G is set according to the dimension and shape of stirring pin G2, the material, thickness, etc. of the to-be-joined metal member 1 friction-stirred, etc., most are It is set in the range of 30-300 (mm / min).

When there exists a possibility that the heat input amount to the to-be-joined metal member 1 may become excessive, it is preferable to cool by supplying water from the surface A side to the circumference | surroundings of this bonding rotary tool G, and the like. Moreover, when coolant enters between the 1st metal member 1a and the 2nd metal member 1b, there exists a possibility that an oxide film may generate | occur | produce in a joining surface (end surface 11a, 11b, FIG. 2 (b)). In this embodiment, since the joint between the to-be-joined metal member 1 is closed by performing a temporary joining process, it is difficult for cooling water to enter between the to-be-joined metal member 1, and there exists no possibility of deteriorating the quality of a junction part. .

In the abutting part J1 of the metal member 1 to be joined, a route of friction stir is set on the seam phase of the metal member 1 to be joined (the movement trajectory phase in the temporary joining process), and viewed along the route. By relatively moving the rotary tool G for joining, friction stirring is performed continuously from one end part of the butt | matching part J1 to the other end part. When this bonding rotary tool G is relatively moved to the other end of the butt | matching part J1, it will cross the butt part J3, performing friction stirring, and will make it relatively move toward the end position E _{M1 as} it is.

In addition, in this embodiment, since the starting position S _M1 of friction stirring is set on the extension line of the seam (boundary line) of the to-be-joined metal member 1 shown in the surface A side of the to-be-joined metal member 1, The route of friction stir in the first main joining step can be straight. When the route of the friction stirring is in a straight line, the moving distance of the main joining rotary tool G can be suppressed to a minimum, so that the first main joining step can be efficiently performed, and the main joining rotary tool G It is possible to reduce the amount of wear.

When this joining rotary tool G reaches the end position E _M1 , as shown in FIG.7 (c), it raises while rotating this joining rotary tool G, and raises stirring pin G2. A departure is made from the end position E _M1 (see FIG. 7B). In addition, when the stirring pin G2 is separated upward in the end position E _M1 , the hollow hole Q1 which is almost the same shape as the stirring pin G2 is inevitably formed, but is left as it is in this embodiment. .

The rotational speed (rotational speed at the time of removal) of the rotational tool G for this bonding when the stirring pin G2 of this rotational tool G for this bonding is separated from the end position E _M1 is rotation at the time of movement. It is preferable to make it faster than speed. In this way, since the detachment resistance of the stirring pin G2 becomes small compared with the case where the rotational speed at the time of removal is made the same as the rotational speed at the time of movement, detachment of the stirring pin G2 in the end position E _M1 . It becomes possible to carry out work quickly.

In addition, in this embodiment, although the 1st preliminary process was performed before the 1st main joining process, you may abbreviate | omit the 1st preliminary process and may perform a 1st main joining process immediately after a 1st preparatory process.

(4) 2nd preparation process

The second preparation step is a preparation step performed before the second preliminary step. In this embodiment, the back surface B side of the to-be-joined metal member 1 faces upward, and the reinstallation process is provided again in a friction stirring apparatus which is not shown in figure.

(4-1) Reinstallation Process

In the reinstallation step, after releasing the restraint of the joined metal member 1 that has finished the first main joining step, the front and back sides of the joined metal member 1 are reversed, and the back surface B side is faced upward to stir friction. Reinstall on the mount of the device. In this embodiment, the to-be-joined metal member 1 is rotated half around the front-back axis shown in FIG. 1, and the back and front of the to-be-joined metal member 1 are reversed.

Here, FIG. 8 (a) is sectional drawing toward the 1st metal member 1a side from the butt | matching part J1 after the 2nd preparation process which concerns on this embodiment. As shown in Fig. 8A, in the reinstallation process, when the upper surface of the metal member 1 to be joined becomes the rear surface B and faces the first metal member 1a from the butt portion J1 side, The first tab member 2 is located on the left side of the metal member 1 to be joined, and the second tab member 3 is located on the right side.

Moreover, depending on the friction stirring apparatus, you may rotate back and forth, without releasing the restraint of the to-be-joined metal member 1.

(5) second preliminary step

The 2nd preliminary process is a process performed before a 2nd main joining process, and joins the butt | matching part J2 of the to-be-joined metal member 1 and the 1st tab material 2 in the back surface B side ( 5-1) The first tab member joining step, the temporary joining step (5-2) of temporarily joining the butt portion J1 of the metal member 1 to be joined, the metal member 1 to be joined and the second tab member ( (5-4) Preliminary hole formation which forms a preliminary hole in the start position of the friction stirring in the (5-3) 2nd tab material joining process which joins the butt | matching part J3 of 3), and the 2nd main joining process. The process is provided. In addition, in (5-1) a 1st tab material joining process, (5-2) provisional bonding process, and (5-3) 2nd tab material bonding process, the rotation tool F for provisional bonding is used.

(5-1) First Tab Material Bonding Step, (5-2) Temporary Bonding Step and (5-3) Second Tab Material Bonding Step

(5-1) The 1st tab material joining process, (5-2) provisional joining process, and (5-3) 2nd tab material joining process are (2-3) 1st tab material joining process which concerns on said 1st preliminary process. , (2-2) provisional bonding step, and (2-1) second tap material bonding step. As shown in Fig. 8B, one temporary welding rotary tool F is moved to form a movement trajectory (bead) of one brush drawing, and in the order of the abutment parts J2, J1, J3. Friction stirring is performed continuously. That is, to the end position E _P2 without detaching the stirring pin F2 (refer FIG. 4 (a)) of the temporary welding rotary tool F inserted in the starting position S _P2 of friction stirring in the middle. It moves, and (5-1) 1st tap material joining process, (5-2) provisional joining process, and (5-3) 2nd tap material joining process are performed continuously. In addition, the end position E _P2 becomes the start position S _M2 of the second main bonding step to be performed later.

Here, in a 1st preliminary process, as shown in FIG. 6, (2-1) 2nd tab material joining process, (2-2) provisional bonding process, and (2-3) agent from the 2nd tab material 3 side One tap material joining process was performed in order. On the other hand, in the 2nd preliminary process, when it faces the 1st metal member 1a side from the butt | matching part J1, the 1st tab material 2 is located in the left side of the to-be-joined metal member 1, and the 1st main joining process is carried out. At the end of time, since the friction stir device with the rotary tool G for joining is located above the first tab member 2, the step of joining the first tab member from the first tab member 2 side (5-1). , (5-2) temporary bonding step and (5-3) second tab material bonding step are performed in this order. In this case, since the moving distance of the friction stirring apparatus provided with the rotational tool F for temporary joining becomes small, labor of a work can be saved.

In addition, detailed description of (5-1) 1st tab material joining process, (5-2) provisional bonding process, and (5-3) 2nd tab material bonding process is substantially the same as a 1st preliminary process, and it abbreviate | omits.

(5-4) preliminary hole forming process

As shown in FIG.9 (a), a preliminary hole formation process is a process of forming preliminary hole P2 in the starting position S _M2 of friction stirring in a 2nd main joining process. That is, the preliminary hole forming step is a step of forming the preliminary hole P2 at the insertion scheduled position of the stirring pin G2 of the bonding tool G2. Thereby, the insertion resistance (pressing resistance) of the stirring pin G2 of this joining rotary tool G can be reduced.

In addition, since the preliminary hole formation process (5-4) is substantially equivalent to the (2-4) preliminary hole formation process which concerns on a 1st preliminary process, detailed description is abbreviate | omitted.

(6) second bone bonding step

The 2nd main joining process is a process of joining the butt | matching part J1 in the back surface B side of the to-be-joined metal member 1 in earnest. In the 2nd bone joining process which concerns on this embodiment, it uses the rotation tool G for bone joining, and it is with respect to the butt | matching part J1 of the temporarily joined state from the back surface B side of the metal member 1 to be joined. Friction stirring is performed.

As shown in Figs. 9A and 9B, the second main joining step is a rotational tool G for joining at the start position S _M2 set on the back surface 33 of the second tab member 3. The stirring pin G2 of () is inserted (press-in), and it moves to the end position E _M2 without leaving the inserted stirring pin G2 in the middle. In a 2nd main joining process, friction stirring is started from the preliminary hole P2, and friction stirring is performed continuously to the end position E _M2 . When the rotary tool G for joining is moved, the metal around the stirring pin G2 will plasticize in turn, and at the position away from the stirring pin G2, the metal which was plasticized and hardened again will harden | cure again, A torch region (hereinafter referred to as "back side plasticized region W2") is formed.

Here, when the 2nd preliminary process is complete | finished, the friction stirring apparatus provided with the rotational tool F for temporary welding is just above the end position E _P2 of the 2nd tab material 3 (FIG. 8 (a)). Reference], if the start position S _M2 of the second main bonding step is set above the second tab member 3, the friction stirring device provided with the rotary tool G for the present bonding is not moved. The second main bonding step can be performed, and the work can be omitted.

In addition, about a 2nd main bonding process, since it is substantially the same as a 1st main bonding process, detailed description is abbreviate | omitted. In addition, although the 2nd preliminary process was performed in this embodiment, you may omit a 2nd preliminary process and may perform a 2nd main bonding process immediately after a 1st main bonding process.

(7) tapping material cutting process

In a tab material cutting process, it is a process of cutting off the 1st tab material 2 and the 2nd tab material 3 from the to-be-joined metal member 1. In this embodiment, the to-be-joined metal member 1 which finished the 2nd main joining process is once removed from the mount of a friction stirring apparatus, and it uses the cutting mechanism not shown, and along the abutting part J2, J3, the 1st tab material (2) and the 2nd tab material 3 are excised.

FIG. 10: is a perspective view which shows the to-be-joined metal member after the tab material cutting process which concerns on 1st Embodiment. As shown in FIG. 10, the surface side plasticization area | region W1 and the back surface side plasticization area | region W2 are formed continuously from the 1st side surface C side to the 2nd side surface D side. On the other hand, between the surface side plasticization area | region W1 and the back surface side plasticization area | region W2, the fine unbaked area | region j continuous from the 1st side surface C side to the 2nd side surface D side is formed. It is.

Here, the surface-side small flame region (W1) and the back side small flame region (W2), the advancing direction of the joining rotation tool (G) for (see the arrow V _1, V ₂₎ the left side, i.e., the second metal member (1b ), It is assumed that tunnel-shaped cavity defects R ₁ and R _{2 that} are continuous from the first side C side to the second side D side are generated. Tunnel-shaped cavity defects R ₁ and R ₂ are formed by lack of metal due to bundles of burrs when friction stir welding is performed.

In addition, as shown in FIG. 10, it is assumed that the oxide films S ₁ to S ₄ are wound at both ends of the surface-side plasticized region W1 and the back-side plasticized region W2. The oxide films S ₁ to S ₄ are formed by winding the oxide film formed on the first side surface C or the second side surface D inside the joined metal member 1. For example, since the oxide film S ₁ is rotating the main rotary tool G for the right side, the back surface side is wound up by winding the oxide film formed on the second side surface D inside the second metal member 1b. It is easy to be formed in the 2nd metal member 1b side with respect to the plasticization area | region W2.

(8) concave groove forming process

The recessed groove formation process is a process of forming the recessed groove K in the 1st side surface C and the 2nd side surface D along the butt | matching part J1. The recessed groove K is a groove | channel which fills a weld metal in the side welding process demonstrated later. In the present embodiment, the recessed grooves K are continuously formed from the rear surface B to the surface A at a constant width m and depth p using a known end mill or the like.

By providing the concave groove K, when performing the welding described later, the weld metal can be appropriately filled and the oxide films S ₁ to S ₄ (see FIG. 10) can be removed. That is, the width m and the depth p of the concave groove K may be appropriately set in accordance with the size (range) of the oxide films S ₁ to S ₄ . Moreover, it is preferable that the width m of the recessed groove K and the width n of the back surface side plasticization area | region W2 are formed so that m <n. Thereby, since the range which fills a weld metal at the time of welding can be made small, working efficiency can be improved. In addition, although the recessed groove K was formed in rectangular shape by the cross section in this embodiment, it is not limited to this and may be another shape.

(9) side welding process

The side welding process is a process of welding along the unbaked area | region j regarding 1st side surface C and 2nd side surface D, as shown to FIG. 12 (a). In this embodiment, it is preferable to perform padding welding by TIG welding, MIG welding, etc. By the padding welding, the concave groove K can be filled with the weld metal T. FIG. Thereby, the unfired region j existing between the surface-side plasticized region W1 and the back-side plasticized region W2 is reliably sealed with the welding metal T, and the strength of the joining site can be increased. have.

Further, for example, a first tunnel-shaped cavity defects are continuous in a second side (D) from the wing _{(C) (R 1, R} 2) ( see Fig. 10) even if they are formed, the weld metal in the concave groove (K) (T ), The tunnel-shaped cavity defects R ₁ and R ₂ can be divided and enclosed in the metal member 1 to be joined. In addition, although a welding material may differ from the to-be-joined metal member 1, in this embodiment, the same material is used.

(10) padding ablation process

The padding part ablation process is a part which protrudes from the surface of the 1st side surface C or the 2nd side surface D of the welding metal T filled in the side welding process as shown to FIG. 12 (b). Padding portion T ']. By cutting off this padding part T ', the surface of the 1st side surface C or the 2nd side surface D can be shape | molded smoothly.

According to the joining method which concerns on this invention demonstrated above, as shown in FIG. 1, the front surface A and the back surface B side are joined by friction stirring among the abutting part J1 of the to-be-joined metal member 1. At the same time, the first side surface C and the second side surface D are welded so that the unfired region j existing between the surface side plasticized region W1 and the back side plasticized region W2 is welded ( By covering with T) and sealing, the airtightness and watertightness between the both sides of the to-be-joined metal member 1 can be improved.

In addition, even when tunnel-shaped cavity defects R ₁ and R ₂ communicating from the first side surface C to the second side surface are formed, the tunnel-shaped cavity defects are formed by filling the concave groove K with the weld metal T. R ₁ and R ₂ may be divided and encapsulated in the metal member 1 to be joined. Further, even when the oxide films S ₁ to S ₄ (see FIG. 10) are wound in the surface side plasticized region W1 and the back side plasticized region W2, the oxidation is performed when the recess grooves K are formed. Films S ₁ to S ₄ can be excised. Thereby, the airtightness and watertightness of the to-be-joined metal member 1 can further be improved.

Further, in the side welding step, the padding welding can easily fill the concave groove K with the weld metal T, and at the same time, the padding portion T 'protruding from the side surface of the weld metal T is removed. By cutting off, the finishing surface can also be smoothed.

Second Embodiment

Next, a second embodiment of the present invention will be described.

In 1st Embodiment, although the side welding process was performed after the recessed groove K was formed, it is not necessary to provide the recessed groove K like 2nd Embodiment which concerns on this invention.

FIG. 13: is a figure which shows 2nd Embodiment, (a) is a perspective view, (b) is sectional drawing seen from the VI-VI arrow direction of (a).

In the side welding process which concerns on 2nd Embodiment, the butt | matching part J1 (unfired area | region j) of the 1st side surface C and the 2nd side surface D side, without providing the recessed groove K. Welding is performed along. And as shown to Fig.13 (b), among the welding metal T, the padding part T 'which protruded from the 2nd side surface D is excised and the 1st side surface C and the 2nd side surface ( You may finish the surface of D) smoothly. Even in such a joining method, the airtightness and watertightness between the both side surfaces of the to-be-joined metal member 1 can be improved.

As mentioned above, although embodiment of this invention was described in detail, it can change suitably in the range which does not deviate from the meaning of this invention. For example, in this embodiment, although the side welding process was performed to both side surfaces of the to-be-joined metal member 1, it is not limited to this, You may only perform welding to the other side surface. In addition, the rotation direction and the advancing direction of this bonding rotary tool G are not limited to the said form.

In addition, in the side welding process, although TIG welding or MIG welding was employ | adopted in this embodiment, it is an illustration to the last and other welding may be sufficient. In addition, although the friction stirring apparatus which concerns on this embodiment performed friction stirring from the upper side of the to-be-joined metal member, it is not limited to this, The rotation tool G for joining which looked around the to-be-joined metal member moves. You may perform friction stirring, carrying out. In addition, the path | route of friction stirring concerning a 1st preliminary process, a 1st main joining process, a 2nd preliminary process, and a 2nd main joining process is an illustration to the last, and another route may be sufficient. The first metal member 1a and the second metal member 1b may be hollow members.

[Third Embodiment]

Next, a third embodiment of the present invention will be described.

In the manufacturing method of the joining structure of 3rd Embodiment, as shown in FIG. 14, the joining structure 21 which makes the end surface of the 1st metal member 1a and the end surface of the 2nd metal member 1b abut. And a concave groove (K21, K21) formed in the first side surface (C) and the second side surface (D) after friction stir welding is performed from the front surface (A) and the rear surface (B) of the joining structure (21). The joint members U and U are inserted into the welds.

The manufacturing method of the joining structure of this embodiment is (1) abutting process, (2) 1st bone joining process, (3) 2nd bone joining process, (4) concave groove formation process, (5) concave groove welding process. , (6) joint member insertion step, (7) third bone bonding step, (8) fourth bone bonding step, and (9) side welding step. Hereinafter, each process is explained in full detail. In addition, the top, bottom, left, and right back and forth in this embodiment follow the arrow of FIG.

(1) butt process

The butt process is a process of butt | matching the end surface 11a of the 1st metal member 1a, and the end surface 11b of the 2nd metal member 1b, as shown to FIG. 15 (a) and (b). to be. Since the butt process is almost equivalent to the butt process which concerns on 1st Embodiment, the overlapping description is abbreviate | omitted.

(2) First main bonding step

As shown in FIG. 18, the first main joining step is performed from the surface A of the joining structure 21 with respect to the butt portion J21 of the first metal member 1a and the second metal member 1b. It is a process of performing friction stir welding using this rotating tool G for joining (refer FIG. 4).

The first main joining step includes a tab member arranging step of arranging the tab members 2 and 3 in the joining structure 21 and abutting portions J21 of the first metal member 1a and the second metal member 1b. It includes the present bonding step of performing friction stir from the surface (A).

As shown in FIG. 16, the tab member arrangement step is a step of arranging the pair of tab members 2 and 3 on both the left and right sides of the joining portion of the joining structure 21. In the friction stir process described later, the tab members 2 and 3 end the starting position at which the main rotary tool G (see Fig. 4) is pressed and the main rotary tool G are separated from the starting position. Is to set the location.

The first tab member 2 and the second tab member 3 are rectangular metal members, and in this embodiment, the same material as that of the joining structure 21 is used. The surface and the back surface of the 1st tab material 2 and the 2nd tab material 3 are formed in the surface of the same height as the surface A and the back surface B of the joining structure 21.

The first tab member 2 is disposed in contact with the first side surface C of the bonding structure 21, and the second tab member 3 is disposed in contact with the second side surface D of the bonding structure 21.

The 1st tab material 2, the 2nd tab material 3, and the joining structure 21 are temporarily joined by welding in the corner part which entered them, respectively.

As shown in FIG. 18, this joining process is the end position E, without leaving the stirring pin G2 of the rotary tool G for bone bonding inserted in the starting position S _P1 of friction stirring in the middle. _It moves to _P2 ) and it is the process of carrying out friction stir of the butt | matching part J21.

First, as shown in Figure 17 (a), the first taepjae 2, place and location of this joint rotation tool (G) for immediately above the start position (S _P1) arranged on the, continue to the joint rotation for It moved down while rotating the tool (G) is pressed against the pin stirring the starting position (G2) (S _P1).

The rotation speed of this joining rotary tool G is set according to the dimension, the shape of stirring pin G2, the material, thickness, etc. of the joining structure 21 etc. which are friction-stirred.

When the stirring pin G2 contacts the surface of the 1st tab material 2, the metal around the stirring pin G2 plasticizes by frictional heat, and as shown in FIG.17 (b), the stirring pin (G2) is inserted into the first tab member 2.

In addition, when a preliminary hole is formed in advance at the insertion scheduled position of the main joining rotary tool G, the press-in resistance at the time of press-fitting the main joining rotary tool G can be reduced, and the precision of friction stir welding is improved. At the same time, the joining operation can be performed quickly.

When the whole stirring pin G2 enters the 1st tap material 2 and the whole surface of the lower end surface G11 of the shoulder part G1 contacts the surface of the 1st tap material 2, it is as shown in FIG. In the same manner, the joining rotary tool G is moved toward the butt portion J21 while rotating.

The moving speed (feeding speed) of this joining rotary tool G is set according to the material, thickness, etc. of the joining structure 21 etc. which are friction-stirred, the dimension and shape of the stirring pin G2, and the like.

When the joining rotary tool G is moved, the metal around the stirring pin G2 is plasticized in turn, and at the position away from the stirring pin G2, the metal that has been plasticized is cured again and the surface is hardened. The side plasticization area | region W21 is formed (refer FIG. 17 (b)).

This bonding step, according to the first metal member (1a) and the seam root set top (boundary) of the second metal member (1b) from the starting position (S _P1), in succession to the joining rotation tool (G) for By moving, friction stirring is performed with respect to the butt | matching part J21 of the 1st metal member 1a and the 2nd metal member 1b.

And when this joining rotary tool G passes through the butt | matching part J21, and reaches | attains the end position E _P2 provided in place of the 2nd tab material 3, this joining rotary tool G rotates. While raising, the stirring pin G2 is separated from the end position E _P2 . Thereby, friction stir welding on the surface A side of the joining structure 21 is completed.

In addition, in this embodiment, although the starting position S _P1 is provided in the 1st tap material 2 and the ending position E _P2 is provided in the 2nd tap material 3, it is a starting position in the 2nd tap material 3. (S _P1 ) may be provided, and the end position E _P2 may be provided in the first tab member 2.

(3) 2nd main bonding process

As shown in FIG. 19, the second main bonding step is performed from the rear surface B of the bonding structure 21 with respect to the butt portion J21 of the first metal member 1a and the second metal member 1b. It is a process of performing friction stir welding.

In the second main joining step, when the first main joining step is completed, the joining structure 21 is once removed from the friction stirring device (not shown), and the back surface B is upwardly fixed again.

Since the 2nd main joining process is the same as that of the said 1st main joining process except the tab material arrangement process not being included, the detailed description is abbreviate | omitted.

In addition, the plasticization area | region formed in the 2nd main bonding process is called back surface plasticization area | region W22. Moreover, when the 2nd main joining process is complete | finished, the tab members 2 and 3 are cut out from the joining structure 21 and removed.

(4) concave groove forming process

As shown in FIG. 20, the concave groove forming step includes the first metal member 1a and the second metal member 1b at the first side surface C and the second side surface D of the joining structure 21. Is a step of forming the concave grooves K21 and K21 along the butt portion J21. In this embodiment, concave grooves K21 and K21 are continuously formed from the surface A to the rear surface B at a constant width and depth using cutting tools such as known end mills. In addition, in this embodiment, the depth of the recessed groove K21 is set so that the width | variety of the butt | matching part J21 remaining between the recessed grooves K21 and K21 of both sides may be about half of the maximum width of the joining structure 21, have.

(5) concave groove welding process

In the concave groove welding step, the groove portion for forming the first groove portion K22 in the concave grooves K21 and K21 on both sides along the butt portion J21 of the first metal member 1a and the second metal member 1b. It includes a forming step (see FIG. 21) and a welding metal filling step (see FIG. 22) for filling the first groove portion K22 with the weld metal.

In the groove portion forming step, as shown in FIG. 21, the first groove portion K22 having a concave shape is formed along the butt portion J21 exposed to the side surfaces in the recessed grooves K21 and K21 on both sides. In the present embodiment, the first groove portion K22 is continuously formed from the surface A to the rear surface B at a constant width and depth using a cutting tool such as a known end mill.

The groove width of the first groove portion K22 is not limited, but is set to a groove width smaller than the widths of the surface side plasticized region W21 and the back side plasticized region W22 in this embodiment. In addition, when there exists a possibility that a cavity defect may be formed in surface side plasticization area | region W21 and back surface plasticization area | region W22, it is preferable to set the groove width in 1st groove part K22 so that a cavity defect may be included. Do.

In the weld metal filling step, as shown in FIG. 22, the first groove portion K22 is filled with the weld metal T21 by performing padding welding such as MIG welding on the first groove portion K22. Thereby, the unfired area | region formed between the surface side plasticization area | region W21 of the surface A side, and the back surface side plasticization area | region W22 of the back surface B side is covered. In addition, when a cavity defect is included in the 1st groove part K22, the cavity defect is closed by the welding metal T21.

In addition, a welding metal filling process is not limited to MIG welding, You may perform other well-known welding. In addition, although a welding material may differ from the joining structure 21, in this embodiment, the same material is used.

Further, after the welding metal T21 is filled in the first groove portion K22, a portion protruding from the side surface (bottom surface) in the concave groove K21 among the welding metal T21 filled in the first groove portion K22 is removed. Abstinence

(6) Joint member insertion process

The joint member insertion step is a step of inserting the joint members U and U into the concave grooves K21 and K21 on both sides, as shown in FIG.

The joint member U is a metal member of a rectangular parallelepiped, and makes the upper and lower height dimensions, the left and right width dimensions, and the front and rear width dimensions the same as each dimension of the recessed groove K21. In this embodiment, although the joint member U is formed from the metal material of the composition similar to the joining structure 21, what is necessary is just a metal material which can be friction-stirred.

 In the joint member U inserted in the concave groove K21 on the side of the first side surface C, the surface (upper surface) and the surface A of the joining structure 21 are made the same height, and the side and the joining structure are the same. The side surface C of (21) is made into the surface of the same height, and the back surface (lower surface) and the back surface B of the joining structure 21 are made into the surface of the same height.

Similarly, in the joint member U inserted in the concave groove K21 on the side of the second side surface D, the surface (upper surface) and the surface A of the joining structure 21 are the surfaces of the same height. The side surface D of the joining structure 21 is the surface of the same height, and the back surface (lower surface) and the back surface B of the joining structure 21 are the surface of the same height.

(7) Third bone bonding step

As for the 3rd main joining process, as shown in FIG. 25, the surface A of the joining structure 21 with respect to the joining part J22, J23 of the joining structure 21 and each joint member U and U. As shown in FIG. It is a process of performing friction stir welding using the rotation tool G for joining seen from the side.

The 3rd main joining process is the tab material arrangement process (refer FIG. 24) which arrange | positions the tab materials 4 and 5 to the joining structure 21, and the butt part of the joining structure 21 and each joint member U and U ( This bonding process (refer FIG. 25) which performs friction stirring with respect to J22, J23 from the surface A is included.

As shown in FIG. 24, the tab member arrangement step is a step of arranging the pair of tab members 4 and 5 on the left and right sides of the joining portion of the joining structure 21. This tab member 4, 5 disengages the starting position S _P3 , S _P5 which presses the rotary tool G for this bonding in this bonding process demonstrated below, and this rotary tool G for this bonding. The end positions E _P4 and E _P6 to be set are set (see FIG. 25).

The third tab member 4 and the fourth tab member 5 are rectangular metal members, and in this embodiment, the same material as that of the joining structure 21 is used. The surface and the back surface of the 3rd tab material 4 and the 4th tab material 5 are formed in the surface of the same height as the surface A and the back surface B of the joining structure 21. FIG.

The third tab member 4 is disposed in contact with the first side surface C of the bonding structure 21, and the fourth tab member 5 is disposed in contact with the second side surface D of the bonding structure 21.

The 3rd tab material 4, the 4th tab material 5, and the joining structure 21 are temporarily joined by welding in the corner part which entered.

In this bonding process, as shown in FIG. 25, the stirring pin G2 of the rotation tool G for this bonding inserted in the starting position S _P3 set in the surface of the 3rd tab material 4 is joined together. The joint structure 21 and the right joint member U are moved by passing through the joint between the 21 and the right joint member U to the end position E _P4 set on the surface of the third tab member 4. Friction stirring of the butt | matching part J22 with is performed.

Similarly, the joining structure 21 and the joint member U of the left side were made to stir the pin G2 of the rotation tool G for this bonding inserted in the starting position S _P5 set on the surface of the 4th tab material 5. The friction stir of the abutting part J23 between the joining structure 21 and the left side joint member U is performed by moving to the end position E _P6 set on the surface of the 4th tab material 5 through the joint of the wire. . The plasticized region formed in the third main bonding step is referred to as surface side plasticized region W23.

In addition, since the friction stir welding performed in a 3rd main joining process is equivalent to the friction stir welding performed in a 1st main joining process and a 2nd main joining process, the detailed description is abbreviate | omitted.

(8) 4th main bonding process

In the fourth main bonding step, as shown in FIG. 26, the rear surface B of the bonding structure 21 with respect to the abutting portions J22 and J23 between the bonding structure 21 and the respective joint members U and U. It is a process of performing friction stirring using the rotating tool G for bonding seen from the side.

In the 4th main joining process, when the 3rd main joining process is complete | finished, it remove | eliminates the joining structure 21 once from the friction stirring apparatus which is not shown in figure, and fixes it again with the back surface B facing upwards.

Since the 4th main bonding process is the same as that of the said 3rd main bonding process except the tab material arrangement process not being included, the detailed description is abbreviate | omitted.

In addition, the plasticization area | region formed at the 4th main bonding process is called back surface plasticization area | region W24. In addition, when the 4th main joining process is complete | finished, the tab members 4 and 5 are cut out from the joining structure 21 and removed.

(9) side welding process

The side welding process is performed on the two side surfaces C and D of the joining structure 21 along the abutting portions J22 and J23 of the joining structure 21 and the joint member U, and the second grooves K23 and K23, The groove part forming process (refer FIG. 26) which forms K23 and K23, and the welding metal filling process (refer FIG. 14) which fills each 2nd groove part K23 with a weld metal.

In the groove portion forming step, as shown in FIG. 26, the concave second groove portion K23 is formed along the butt portions J22 and J23 exposed on both side surfaces C and D of the joining structure 21. In the present embodiment, the second groove portion K23 is continuously formed from the surface A to the rear surface B at a constant width and depth using a cutting tool such as a known end mill.

The groove width of the second groove portion K23 is not limited, but is set to a groove width smaller than the widths of the surface-side plasticization region W23 and the back-side plasticization region W24 in this embodiment. Moreover, when there exists a possibility that a cavity defect may be formed in the surface side plasticization area | region W23 and the back side plasticization area | region W24, it is preferable to set the groove width in the 2nd groove part K23 so that a cavity defect may be included. Do.

In the weld metal filling step, as shown in FIG. 14, the second groove portion K23 is filled with the weld metal T22 by performing padding welding such as MIG welding on the second groove portion K23. Thereby, the unfired area | region formed between the surface side plasticization area | region W23 of the surface A side, and the back surface side plasticization area | region W24 of the back surface B side is covered. In addition, when a cavity defect is contained in the 2nd groove part K23, the cavity defect is closed by the welding metal T22.

In addition, a welding metal filling process is not limited to MIG welding, You may perform other well-known welding. In addition, although a welding material may differ from the joining structure 21, in this embodiment, the same material is used.

In addition, after the welding metal T22 is filled in the second groove K23, the welding metal T22 filled in the second groove K23 protrudes from the side surfaces C and D of the joining structure 21. Excision part.

As described above, as shown in FIG. 14, the joining structure 21 in which the end face of the first metal member 1a and the end face of the second metal member 1b are joined to each other is formed.

According to the manufacturing method of the joining structure of this embodiment, as shown in FIG. 14, the joining structure 21 in the surface A, the back surface B, and both side surfaces C and D of the joining structure 21 is shown. And the abutment portions J22 and J23 of the joint members U and U are joined, and the entire joint between the joint structure 21 and each of the joint members U and U is closed, so that the first metal member 1a The airtightness and watertightness in the junction part of the 2nd metal member 1b can be improved.

Further, in the concave groove welding step, after welding is performed from the concave groove K21 to the butt portion J21 of the first metal member 1a and the second metal member 1b, the concave groove K21. The joint member U is inserted into the joint, and welding is performed from the side surfaces C and D with respect to the abutting portions J22 and J23 of the joint structure 21 and the joint member U in the side welding step. Therefore, since the side part of the joining structure 21 is in the state welded in double in the thickness direction, the airtightness and water tightness in the joining part of the 1st metal member 1a and the 2nd metal member 1b can be improved. .

In particular, when the width of the butt portion J21 is set to about half the maximum width of the bonding structure 21 as in the present embodiment, welding is performed at the center of the bonding structure 21, so that the first metal member The airtightness and water tightness in the junction part of (1a) and the 2nd metal member 1b can be improved.

Further, in the concave groove welding step, the weld metal T21 is filled in the first groove part K22 formed along the butt part J21, and in the side welding step, the second groove part K23 formed along the butt parts J22 and J23. ) Can be easily filled with the weld metals T21 and T22, and the sealing portions J21, J22, and J23 can be reliably sealed.

In the concave groove welding step, the side surface of the concave groove K21 is smoothly formed by cutting a portion protruding from the side surface of the concave groove K21 of the weld metal T22 filled in the first groove portion K22. Since the side surface of the concave groove K21 and the outer surface of the joint member U can be brought into close contact with each other, the airtightness and water tightness at the joint between the joining structure 21 and the joint member U can be improved.

Moreover, in the side welding process, the finishing surface of the joining structure 21 is made smooth by cutting off the part which protruded from the side surface C, D of the joining structure 21 among the weld metals filled in the 2nd groove part K23. It can be molded.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A design change is possible suitably in the range which does not deviate from the meaning.

For example, in the concave groove welding step of the present embodiment, as shown in FIG. 22, the first groove portion K22 is formed from the front surface A to the rear surface B along the butt portion J21. However, a groove is formed in a portion corresponding to the unfired region formed between the surface-side plasticized region W21 on the surface A side and the back-side plasticized region W22 on the back surface B side, and the groove portion The unbaked region may be sealed by filling the weld metal.

In addition, in the side welding process of this embodiment, although the 2nd groove part K23 is formed along the butt | matching part J22, J23 as shown in FIG. 14 from the surface A to the back surface B, A groove is formed in a portion corresponding to the unfired region formed between the surface-side plasticization region W23 on the surface A side and the backside-side plasticization region W24 on the back surface B side, and the grooved portion is weld metal The unfired region may be sealed by filling with.

In addition, you may perform the temporary joining process of carrying out the friction stir welding of the butt | matching part J21 using the rotating tool smaller than this rotating tool G for this bonding before a 1st main joining process and a 2nd main joining process. Thus, by temporarily joining the butt | matching part J21, it can prevent that a gap arises when this joining rotary tool G is press-fitted into the butt | matching part J21. Similarly, when the joining parts J22 and J23 are temporarily joined to the joining parts J22 and J23 before the third main joining step and the fourth main joining step, the gap is formed. It can be prevented from occurring.

In addition, in the 1st main joining process and the 2nd main joining process of this embodiment, although the pair of tab members 2 and 3 are arrange | positioned at both left and right sides of the joining structure 21, as shown in FIG. The tab member may not necessarily be installed. Thus, when omitting a tab material, the start position and end position of friction stirring are set to the both ends of the abutting part J21 of the 1st metal member 1a and the 2nd metal member 1b, and a concave groove welding process WHEREIN: It is preferable to form the 1st groove part K22 so that the start position and end position of friction stirring may be excised.

Similarly, in the 3rd main joining process and the 4th main joining process, the start position and end position of friction stirring are set to the both ends of butt | matching part J22, J23, without providing a tab material, and in a side welding process, It is preferable to form the second groove portion K23 so that the start position and the end position are cut off.

In addition, in this embodiment, as shown in FIG. 23, although the cross-sectional shape of the recessed groove K21 is formed in the rectangle, and the rectangular parallelepiped joint member U is inserted in this recessed groove K21, the recessed groove ( The shape of K21) and the joint member U is not limited, A different shape may be sufficient.

[4th Embodiment]

Next, a fourth embodiment of the present invention will be described.

In the joining method according to the fourth embodiment, as shown in FIG. 27A, the joined metal member (1) formed by facing end surfaces of the first metal member 1a and the second metal member 1b ( 31. The surface A of the metal member 31 to be joined after welding is performed from the first side surface C and the second side surface D of the metal member 31 to be joined. And friction stir welding from the back surface (B).

The joining method which concerns on this embodiment is (1) abutting process, (2) 1st side welding process, (3) 2nd side welding process, (4) 1st bone bonding process, (5) 2nd bone bonding process It will include. Each process is explained in full detail below. In addition, the top, bottom, left and right in this embodiment follow the arrow of FIG.

(1) butt process

The butt process is a process which abuts the end surfaces of the 1st metal member 1a and the 2nd metal member 1b, as shown to FIG. 28 (a) and (b). The 1st metal member 1a and the 2nd metal member 1b are rectangular metal members as seen from the cross section, and have substantially equivalent shape. On both side surfaces of the end surface 11a of the first metal member 1a, concave grooves Ka and Ka are formed that are continuous from the surface 12a toward the rear surface 13a. Moreover, the recessed grooves Kb and Kb which are continuous toward the back surface 13b from the surface 12b are formed in the both side surface side of the end surface 11b of the 2nd metal member 1b.

In the present embodiment, the first metal member 1a and the second metal member 1b are metals capable of friction stirring, such as aluminum, aluminum alloys, copper, copper alloys, titanium, titanium alloys, magnesium, magnesium alloys, and the like. Made of materials.

The butt step abuts the end face 11a of the first metal member 1a and the end face 11b of the second metal member 1b, and at the same time, the surface 12a and the first face of the first metal member 1a are formed. 2 The surface 12b of the metal member 1b is formed at the same height, and the rear surface 13a of the first metal member 1a and the rear surface 13b of the second metal member 1b are formed at the same height. do. Moreover, the side surface 14a of the 1st metal member 1a and the side surface 14b of the 2nd metal member 1b are made into the surface of the same height, and the side surface 15a and 1st of the 1st metal member 1a are made, for example. 2 The side surface 15b of the metal member 1b is formed in the surface of the same height.

As shown in FIG. 27, a member formed by abutting the first metal member 1a and the second metal member 1b is hereinafter referred to as a to-be-joined metal member 31, and its surface is the surface A and the back surface. The back side (B), one side is called the first side (C), the other side is called the second side (D).

As shown in FIG. 28B, abutting portion J31 is formed on the mating surface of the first metal member 1a and the second metal member 1b. In addition, the concave groove Ka of the first metal member 1a and the concave groove Kb of the second metal member 1b face each other, so that both surfaces of the metal member 31 to be joined are opposite from the front surface A to the back surface ( Concave grooves K30 and K30 continuous to B) are formed.

In addition, in this embodiment, although the recessed grooves Ka and Kb of the 1st metal member 1a and the 2nd metal member 1b were formed previously, it is not limited to this. For example, after abutting the 1st metal member 1a and the 2nd metal member 1b, you may cut using a cutting tool and form the recessed groove K30. Moreover, although there is no restriction | limiting in particular in the shape and dimension of the 1st metal member 1a and the 2nd metal member 1b, It is preferable to make the thickness dimension in the butt | matching part J31 at least the same. In addition, in this embodiment, although the shape of the recessed groove K30 was formed in the rectangle seen from the cross section, it may be another shape.

(2) first side welding process

The 1st side welding process is a process of welding with respect to the butt | matching part J31 exposed to the 1st side surface C of the to-be-joined metal member 31. FIG. In the first side welding step, as shown in FIG. 29A, padding welding is performed on the concave groove K30 formed in the first side surface C of the metal member 31 to be joined. It includes a padding welding step to be performed, and a padding part cutting step of cutting a portion protruding from the first side surface C among the weld metals filled by the padding welding.

In the padding welding step, padding welding such as TIG welding or MIG welding is performed on the butt portion J31 to seal the butt portion J31 and the concave groove K30 is filled by the weld metal T. In the present embodiment, as shown in FIG. 29B, padding welding is performed such that the welding metal T protrudes from the first side surface C of the metal member 31 to be joined. The padding welding step is not limited to the above-described TIG welding or MIG welding, and other known welding may be performed. In addition, although a welding material may differ from the to-be-joined metal member 31, in this embodiment, the same material is used.

In the padding part cutting process, as shown to FIG. 29B, the padding part T 'which protruded from the 1st side surface C by the padding welding is cut off using a well-known cutting tool. Thereby, since the surface of the weld metal T can be smoothed, the tab material demonstrated later can be made to adhere to the to-be-joined metal member 31. FIG.

(3) second side welding process

A 2nd side welding process is a process of welding with respect to the butt | matching part J31 exposed to the 2nd side surface D of the to-be-joined metal member 31. FIG. Although not shown in detail, the 2nd side welding process is a padding welding process which performs padding welding to the recessed groove K30 formed in the 2nd side surface D of the to-be-joined metal member 31, and the padding welding was performed by padding welding. It includes a padding part cutting process of cutting out the part which protruded from the 2nd side surface D among the weld metal. Since a 2nd side welding process is substantially the same as a 1st side welding process, detailed description is abbreviate | omitted.

(4) First bone bonding step

In a 1st main joining process, friction stir welding is performed along the butt | matching part J31 from the surface A of the to-be-joined metal member 31. FIG. In this embodiment, in the present embodiment, as illustrated in FIG. 30A, a tab member arrangement step of arranging a tab member on the metal member 31 to be joined and friction against the butt portion J31 are performed. It includes the present bonding step of performing stirring.

In the tab member arrangement step, as shown in FIG. 30A, a pair of tab members are disposed on both side surfaces of the metal member 31 to be joined along the butt portion J31. In this bonding process demonstrated later, a tab material sets the starting position which presses a rotating tool to a tab material, and the end position which disengages a rotating tool from a tab material.

The 1st tab material 2 and the 2nd tab material 3 represent a rectangular parallelepiped, and each surface and back surface are formed in the surface of the same height as the surface A and back surface B of the to-be-joined metal member 31, and have. In this embodiment, the 1st tab material 2 and the 2nd tab material 3 use the raw material equivalent to the metal member 31 to be joined.

As shown in FIG. 30B, the first tab member 2 is brought into contact with the first side surface C, and the second tab member 3 is brought into contact with the second side surface D. As shown in FIG. The corner parts 2a and 2b which entered the 1st tab material 2 and the to-be-joined metal member 31 are temporarily joined by welding. Moreover, the temporary corner parts 3a and 3b of the 2nd tab material 3 and the to-be-joined metal member 31 are temporarily joined by welding. Thereby, in this joining process demonstrated later, spreading of the 1st tab material 2, the 2nd tab material 3, and the to-be-joined metal member 31 can be prevented.

Here, the abutment surface of the to-be-joined metal member 31 and the 1st tab material 2 is called butt | matching part J2. In addition, the abutment surface of the to-be-joined metal member 31 and the 2nd tab material 3 is called butt | matching part J3.

In this bonding process, as shown in FIG. 31, friction stirring is performed using this rotation tool G for bonding along the butt | matching part J31 exposed to the surface A of the to-be-joined metal member 31. As shown in FIG. . In the present bonding step, in the present embodiment, the start position S _M1 is set in the second tab member 3, the end position E _M1 is set in the first tab member 2, and the brush drawing is performed. Friction agitation.

In this bonding process, as shown in FIG. 31, without pressing the starting position S _M1 in the state which rotated this bonding rotation tool G, and leaving this bonding rotation tool G, The relative movement is made to the end position E _M1 . That is, when this bonding rotation tool G is pressed to the starting position S _M1 , it will move toward the start point s1 of this bonding process, and will not join the rotation tool G for this joining part ( Friction stirring is performed along J31). And when the end point s2 of this bonding process is reached, this bonding rotation tool G will be moved to the end position E _M1 set to the 1st tab material 2 as it is, and this bonding tool will be rotated. It separates from the 1st tab material 2.

According to this bonding process, as shown in FIG. 31, the surface side plasticization area | region W31 is formed along the butt | matching part J31. The width Wa of the surface side plasticization region W31 is set larger than the width K _L of the concave groove K30. Thereby, the upper surface of the weld metal T31 is covered by the surface side plasticization area | region W31.

In addition, in this joining process, you may provide a preliminary hole (not shown) in the surface of the 2nd tab material 3 previously. By providing a preliminary hole, the press-in resistance at the time of press-fitting the joining rotary tool G to the 2nd tab material 3 can be reduced. Thereby, the joining operation can be performed quickly while improving the precision of friction stirring.

In addition, you may perform a temporary bonding process with respect to the butt | matching part J31 before this bonding process. That is, in the provisional bonding step, for example, the butt portion J2 and the butt portion (1) of the first tab member 2 and the metal member 31 to be joined using a rotary tool smaller than the present rotary tool G. Friction agitation is performed on the butt portion J3 between the J31 and the second tab member 3 and the metal member 31 to be joined. By performing a temporary joining process before this joining process, spreading of the tab material and the to-be-joined metal member 31 can be prevented.

In addition, in this joining process, when the to-be-joined metal member 31 becomes high heat | fever by friction, work may be performed, supplying water to the butt | matching part J31. In such a case, if the provisional bonding step is performed, water does not enter the gap between the abutting portion J31, so that a high quality product can be supplied.

In addition, in this embodiment, although the starting position S _M1 of this bonding process was provided in the 2nd tab material 3, you may provide in the 1st tab material 2. In addition, in this embodiment, although this joining process was performed using a tab material, it is not necessary to necessarily provide a tab material.

(5) 2nd main bonding process

In a 2nd main joining process, friction stirring is performed along the butt | matching part J31 from the back surface B of the to-be-joined metal member 31. FIG. When the 1st main joining process is complete | finished, the 2nd main joining process removes the to-be-joined metal member 31 from the friction stirring apparatus which is not shown in figure, and fixes it again, facing the back surface B upward. Since the 2nd main joining process is substantially the same as a 1st main joining process except not performing a tab material arrangement process, detailed description is abbreviate | omitted. When the 2nd main joining process is complete | finished, the tab material is cut off from the to-be-joined metal member 31. FIG. In addition, as shown in FIG. 27, the plasticization area | region formed in the 2nd main bonding process is called back surface plasticization area | region W32.

According to the joining method which concerns on this embodiment demonstrated above, welding is performed to the butt | matching part J31 exposed to the 1st side surface C and the 2nd side surface D of the to-be-joined metal member 31, and the surface ( By performing friction stir welding on A) and the back surface B, even if the metal member 31 to be joined is thick, the butt portion J31 exposed to the metal member 31 to be joined can be efficiently and easily joined. Can be.

Moreover, after performing a 1st main joining process and a 2nd main joining process after performing a 1st side welding process and a 2nd side welding process, the upper end part and the lower end part of the weld metal T31 formed at the welding process are to be joined. It is not exposed to the surface A and back surface B of (31). That is, since the interface between the to-be-joined metal member 31 and the weld-metal T31 is friction-stirred at the upper end part and the lower end part of the weld metal T31, the airtightness and water tightness of the to-be-joined metal member 31 can be improved. .

Further, by filling the weld metal T31 in the recessed groove K30, the butt portion J31 can be sealed more reliably. 31, the width K _L of the concave groove K30 is defined by the front side plasticization region W31 and the back side plasticization region (formed by the first bone bonding step and the second bone bonding step). It is preferable to be smaller than the width Wa of W32. According to such a joining method, the range for filling the weld metal T31 can be made small, the work efficiency can be improved, and the entire upper and lower surfaces of the weld metal T31 can be frictionally stirred. As shown in FIG. 31, the depth K _D of the recessed groove K30 may be appropriately set according to the type of welding and the raw material of the metal member to be joined.

[Fifth Embodiment]

Next, a fifth embodiment of the present invention will be described.

FIG. 32 is a view showing a fifth embodiment, (a) is a perspective view, and (b) is a sectional view taken along the line II-II of (a). The joining method which concerns on 5th Embodiment differs from 4th Embodiment in that a side welding process is performed, without providing a recessed groove.

That is, the side welding process which concerns on 5th Embodiment does not provide the concave groove K30 in the to-be-joined metal member 31 like the joining method which concerns on 4th Embodiment, and does welding to the butt | matching part J31. Do it. In the side welding process which concerns on 5th Embodiment, as shown in FIG.32 (b), padding welding is performed with respect to the butt | matching part J31 of the 1st side surface C of the to-be-joined metal member 31. FIG. And the padding part T1 'which protrudes from the 1st side surface C among the welding metal T31 formed by padding welding is cut off so that it may become the surface of the same height as 1st side surface C. As shown in FIG. Thus, in the side welding process, even if it does not form the recessed groove K30, it can weld easily to the unbaked area | region exposed to the metal member 31 to be joined.

And after performing the side welding process which concerns on 5th Embodiment, a 1st main joining process and a 2nd main joining process are performed. Since other processes are substantially the same as in the fourth embodiment, description thereof is omitted.

[Sixth Embodiment]

Next, a sixth embodiment of the present invention will be described.

33 is a perspective view illustrating a bonding method according to a sixth embodiment. The joining method according to the sixth embodiment differs from the fifth embodiment in that the first metal member 10a and the second metal member 10b are joined in an L shape in plan view.

The joining method which concerns on 6th Embodiment is (1) abutting process, (2) 1st side welding process, (3) 2nd side welding process, (4) 1st bone bonding process, (5) 2nd bone bonding It includes a process. Each process is explained in full detail below.

(1) butt process

In the butt process, as shown in FIG. 34, the side surface of the 1st metal member 10a and the end surface of the 2nd metal member 10b are abutted. The 1st metal member 10a is a metal member which shows a rectangular parallelepiped. On the other hand, the 2nd metal member 10b is a metal member which shows a substantially rectangular parallelepiped, and recessed grooves Kc and Kd are formed in the both sides of the end surface 11a. The recessed grooves Kc and Kd are rectangular in cross section, and are continuously formed from the front surface 12b to the rear surface 13b of the second metal member 10b.

In the butt step, the side surface 44a of the first metal member 10a and the end face 11a of the second metal member 10b are abutted, and the surfaces 42a and the second of the first metal member 10a are provided. The surface 12b of the metal member 10b is the surface of the same height, and the back surface 43a of the 1st metal member 10a and the back surface 13b of the 2nd metal member 10b are the surface of the same height. . Moreover, the end surface 45a of the 1st metal member 10a and the side surface 15b of the 2nd metal member 10b are made into the surface of the same height. An abutting portion J41 (see FIG. 33) is formed on the abutting surface between the side surface 44a of the first metal member 10a and the end face 11a of the second metal member 10b.

33, the member formed by making the 1st metal member 10a and the 2nd metal member 10b oppose is hereafter called the to-be-joined metal member 41. FIG. In addition, the surface of the to-be-joined metal member 41 is called surface A, and the back surface is called back surface B, and the side surface 44a and the 2nd of the 1st metal member 10a of the to-be-joined metal member 41 are also referred to as the back surface B. FIG. The surface which consists of the side surface 14b of the metal member 10b is called 1st side surface C. FIG. Moreover, the surface comprised from the end surface 45a of the 1st metal member 10a, and the side surface 15b of the 2nd metal member 10b among the to-be-joined metal members 41 is called 2nd side surface D. FIG. . Moreover, it is called the corner part I containing the corner part comprised from the side surface 44a of the 1st metal member 10a, and the side surface 14b of the 2nd metal member 10b.

(2) first side welding process

The 1st side welding process is a process of welding with respect to the butt | matching part J41 exposed to the 1st side surface C of the to-be-joined metal member 41. FIG. In 1st Embodiment, as for a 1st side welding process, as shown to Fig.35 (a) and (b), the padding welding process which performs padding welding to the recessed groove Kc, and padding welding are performed by a padding welding. 2, the padding part cutting process of cutting out the part which protruded from the side surface 14b of the metal member 10b is included.

In the padding welding step, as shown in FIG. 35A, padding welding such as TIG welding or MIG welding is performed on the butt portion J41 to seal the butt portion J41 and at the same time, the weld metal T41. Is filled with concave grooves Kc. In this embodiment, padding welding is performed so that the welding metal T41 may protrude from the side surface 14b of the second metal member 10b. The padding welding step is not limited to the above-described TIG welding or MIG welding, and other known welding may be performed.

In the padding part ablation step, as illustrated in FIG. 35B, the padding part T1 ′ protruding from the side surface 14b of the second metal member 10b is removed by padding welding. Thereby, since the surface of the weld metal T41 can be smoothed, the tab material demonstrated later can be made to adhere to the to-be-joined metal member 41. FIG.

(3) second side welding process

A 2nd side welding process is a process of welding with respect to the butt | matching part J41 exposed to the 2nd side surface D side of the to-be-joined metal member 41. FIG. The 2nd welding process protrudes from the 2nd side surface D by the padding welding process which performs padding welding to the recessed groove Kd of the 2nd side surface D side of the to-be-joined metal member 41, and a padding welding. And a padding part ablation process for ablation of the part.

Since a 2nd side welding process is substantially the same as a 1st side welding process, detailed description is abbreviate | omitted.

(4) First bone bonding step

In a 1st main joining process, friction stir welding is performed from the surface A of the to-be-joined metal member 41 along the butt | matching part J41. In the sixth embodiment, in the sixth embodiment, as illustrated in FIG. 36, a tab member arrangement step of arranging a tab member on the metal member 41 to be joined, and friction stirring of the butt portion J41 are performed. It includes this bonding step.

In the tab member arrangement step, as shown in FIG. 36, a pair of tab members are disposed along the butt portion J41 of the metal member 41 to be joined. In this bonding process demonstrated later, a tab material sets the starting position which presses a rotating tool to a tab material, and the end position which disengages a rotating tool from a tab material.

The 1st tab member 4 and the 2nd tab member 5 represent a rectangular parallelepiped, and each surface and back surface are formed in the surface of the same height as the surface A and back surface B of the to-be-joined metal member 41, and have. In this embodiment, the 1st tab material 4 and the 2nd tab material 5 use the raw material equivalent to the metal member 41 to be joined. The 1st tab material 4 is contact-positioned along the butt | matching part J41 (welding metal T41) in the 2nd side surface D of the to-be-joined metal member 41. FIG. The second tab member 5 is disposed in contact with the corner portion I of the metal member 41 to be joined. The 1st tab material 4 and the to-be-joined metal member 41 are temporarily joined by welding in the recessed part 4a, 4b. In addition, the 2nd tab material 5 and the to-be-joined metal member 41 are temporarily joined by welding in the recessed part 5a, 5b. Thereby, in this joining process demonstrated later, spreading of the 1st tab material 4, the 2nd tab material 5, and the to-be-joined metal member 41 can be prevented.

In this joining process, as shown in FIG. 37, friction stirring is performed using this joining rotary tool G along the butt | matching part J41 exposed to the surface A of the to-be-joined metal member 41. FIG. . In this bonding process, in 6th Embodiment, the starting position S _M2 is set to the 1st tap material 4, the end position E _M2 is set to the 2nd tap material 5, and the method of drawing a brush is made. Friction agitation.

That is, in this bonding process, it presses to the starting position S _M2 in the state which rotated this bonding rotation tool G, it moves to the starting point s3 of this bonding process, and this rotation tool G for this bonding Friction stirring is performed along the butt | matching part J41, without leaving (). And when the end point s4 of this bonding process is reached, this bonding rotation tool G will be moved to the end position E _M2 set to the 2nd tab material 5 as it is, and this bonding tool will be rotated. It separates from the 2nd tap material 5.

According to this bonding process, as shown in FIG. 37, the surface side plasticization area | region W41 is formed along the butt | matching part J41. Wa / 2 which is 1/2 of the width Wa of the surface-side plasticization region W41 is formed to be larger than the width K _H of the concave groove Kc. Thereby, the upper surface of the weld metal T41 is covered by the surface side plasticization area | region W41.

(5) 2nd main bonding process

In a 2nd main joining process, friction stirring is performed from the back surface B of the to-be-joined metal member 41 along the butt | matching part J41. When the 1st main joining process is complete | finished, the 2nd main joining process removes the to-be-joined metal member 41 from the friction stirring apparatus which is not shown in figure, and fixes the back surface B upwards again. Since the second main bonding step is the same as the first main bonding step except for the tab material arrangement step, detailed description thereof is omitted.

When the 2nd main joining process is complete | finished, a tab material is cut off from the to-be-joined metal member 41. FIG.

In addition, as shown in FIG. 33, the plasticization area | region formed in the 2nd main joining process is called back surface plasticization area | region W42.

According to the joining method which concerns on 6th Embodiment demonstrated above, even when joining in the L shape of planar view, the 1st metal member 10a and the 2nd metal member 10b can be suitably joined.

Further, welding is performed on the butt portion J41 exposed to the first side surface C and the second side surface D of the metal member 41 to be joined, and at the same time, friction is applied to the surface A and the rear surface B. FIG. By performing stirring bonding, even if the to-be-joined metal member 41 is thick, the butt | matching part J41 exposed to the to-be-joined metal member 41 can be joined efficiently and easily.

Moreover, after performing a 1st main joining process and a 2nd main joining process after performing a 1st side welding process and a 2nd side welding process, the upper end part and the lower end part of the weld metal T41 formed in the welding joining process are to-be-joined metals. The surface A and the back surface B of the member 41 are not exposed. That is, since the interface of the to-be-joined metal member 41 and the weld-metal T41 is friction-stirred at the upper end part and the lower end part of the weld metal T41, the airtightness and water tightness of the to-be-joined metal member 41 can be improved.

In addition, by filling the weld metal T41 into the recessed grooves Kc and Kd, the butt portion J41 can be sealed more reliably. Moreover, by providing a padding part cutting process, the finishing surface of the to-be-joined metal member 41 can be smoothly finished.

In addition, you may perform a temporary bonding process with respect to the butt part J41 before this bonding process. That is, in the provisional bonding process, for example, the butt | interval part J14 of the 1st tab material 4 and the to-be-joined metal member 41 and the 2nd tab material using the rotation tool smaller than this joining rotation tool G. Friction stirring is performed on the butt portion J15 between (5) and the metal member 41 to be joined. By performing a temporary joining process before this joining process, spreading of the tab material and the to-be-joined metal member 41 can be prevented.

In the present joining step, when the metal member 41 to be joined is heated by friction, the work may be performed while supplying water to the butt portion J41. In such a case, if the provisional bonding step is performed, water does not enter the gap between the abutting portion J41, so that a high quality product can be supplied.

As mentioned above, although 6th Embodiment of this invention was described, this invention is not limited to the said aspect, A change is possible suitably in the range which is not contrary to the meaning of this invention.

For example, as shown in FIG. 38A, the recess groove Ke may be cut out and formed on the second metal member 10b side of the end face 45a of the first metal member 10a. good. The recessed groove Ke is formed in the shape and size substantially equivalent to the recessed groove Ke. That is, you may form a recessed groove by opposing the recessed groove Ke formed in the 1st metal member 10a, and the recessed groove Kd formed in the 2nd metal member 10b. In addition, you may weld directly to the butt | matching part J41, without providing recessed grooves Kc, Kd, and Ke.

For example, as shown in FIG. 38 (b), at least one of the first metal member 1a and the second metal member 1b is formed in the concave groove Ka formed in the end surface 11a. You may continuously provide the extended recessed groove La extended to the center direction of a member. In the side welding step, the weld metal is filled in the concave groove Ka and the expanded concave groove La by padding welding. In this way, since the welding length can be increased by providing the extended concave groove La, the joint strength can be further increased.

Further, the distance Lb from the front surface 12a of the first metal member 1a to the upper surface of the expanded concave groove La, and the rear surface 13a of the expansion concave groove La from the first metal member 1a. The distance Lc to the lower surface may be smaller than the depth of the surface side plasticized region W31 and the back side plasticized region W32 (see FIG. 27) formed in the first bone bonding process and the second bone bonding process. . Thereby, since the interface of the welding metal and 1st metal member 1a filled in the expanded recessed groove La can be friction-stirred, the airtightness and water tightness of a to-be-joined metal member can be improved. In addition, expansion concave groove La can be employ | adopted in any one of said 4th-6th embodiment. In addition, although both the recessed groove Ka and the extended recessed groove La were formed in the rectangle seen from the cross section, it is not limited to this shape.

For example, in the surface side plasticized regions W31 and W41 and the back side plasticized regions W32 and W42 formed in the first main bonding step and the second main bonding step, the first side surface C is used. There is a possibility that a tunnel-shaped cavity defect in communication with the second side surface D is generated. Moreover, in friction stir welding, when passing through the butt | matching part of a to-be-joined metal member and a tab material, there exists a possibility that the oxide film formed between a to-be-joined metal member and a tab material can be wound to the to-be-joined metal member side. Such tunnel-shaped cavity defects and oxide films are factors that reduce the airtightness and watertightness of the metal member to be joined. Therefore, when such a cavity defect part arises, it is preferable to perform the repair process which encloses the said defect part by welding. In addition, in this embodiment, although the side welding process was performed in the both sides of the to-be-joined metal member, you may only perform only in the other one.

[Seventh Embodiment]

Next, a seventh embodiment of the present invention will be described.

As for the manufacturing method of the joining structure which concerns on 7th Embodiment of this invention, as shown in FIG. 39, the joining which formed the end surface of the 1st metal member 1a and the end surface of the 2nd metal member 1b, was formed. A method of manufacturing the structure 51, and after welding is performed from the first side C and the second side D of the bonding structure 51, the surface 51 and the back surface B of the bonding structure 51 are formed. Friction stir welding is performed.

The manufacturing method of the joining structure of this embodiment is (1) abutting process, (2) side welding process, (3) 1st main joining process, (4) 1st repair process, (5) 2nd main joining process, (6) It includes a 2nd maintenance process. Hereinafter, each process is explained in full detail. In addition, the top, bottom, left, and right back and forth in this embodiment follow the arrow of FIG.

(1) butt process

The butt process abuts the end surface 11a of the 1st metal member 1a, and the end surface 11b of the 2nd metal member 1b as shown to FIG. 40 (a) and (b). It is a process.

As shown to Fig.40 (a), the 1st metal member 1a and the 2nd metal member 1b are rectangular metal members as seen from the cross section, and are substantially equivalent shape. The 1st metal member 1a and the 2nd metal member 1b are metal materials which can stir friction, for example, aluminum, an aluminum alloy, copper, a copper alloy, titanium, a titanium alloy, magnesium, a magnesium alloy.

On both side surfaces 14a and 15a of the end surface 11a of the first metal member 1a, the rectangular parallelepiped cutouts 16a and 17a which have offset the corner portion inward in the width direction are formed from the rear surface 12a. 13a), and the convex part is formed in the front end of the 1st metal member 1a.

On both side surfaces 14b and 15b of the end surface 11b of the second metal member 1b, the rectangular parallelepiped cutouts 16b and 17b which have offset the corner portion inward in the width direction are formed from the back surface 12b. 13b), and the convex part is formed in the rear end part of the 2nd metal member 1b.

In the butt step, as shown in FIG. 40B, the end face 11a of the convex portion of the first metal member 1a is opposed to the end face 11b of the convex portion of the second metal member 1b. At the same time, the surface 12a of the 1st metal member 1a and the surface 12b of the 2nd metal member 1b are made into the surface of the same height, and the back surface 13a and 2nd of the 1st metal member 1a are the same. The back surface 13b of the metal member 1b is made into the surface of the same height. Moreover, the side surface 14a of the 1st metal member 1a and the side surface 14b of the 2nd metal member 1b are arrange | positioned on the same plane, and the side surface 15a of the 1st metal member 1a, and 2nd The side surface 15b of the metal member 1b is disposed on the same plane. And the butt | matching part J51 is formed in the abutment surface of the end surface 11a of the convex part of the 1st metal member 1a, and the end surface 11b of the convex part of the 2nd metal member 1b. The cutout portions 16a and 17a of the first metal member 1a and the cutout portions 16b and 17b of the second metal member 1b are connected to the left and right sides of the butt portion J51 to have a concave shape. Concave grooves K50 and K50 are formed.

The member formed by making the 1st metal member 1a and the 2nd metal member 1b oppose is called the joining structure 51 hereafter. In addition, the upper surface of the joining structure 51 is called surface A, and the lower surface is called back surface B, and the side surface 14a of the 1st metal member 1a and the 2nd metal member 1b of the joining structure 51 are mentioned. The surface which consists of the side surface 14b of () is called 1st side surface (C). In addition, the surface comprised from the side surface 15a of the 1st metal member 1a and the side surface 15b of the 2nd metal member 1b among the joining structures 51 is called 2nd side surface D. FIG.

In addition, in this embodiment, the notch 16a, 17a, 16b, 17b is previously formed with respect to the 1st metal member 1a and the 2nd metal member 1b, For example, the 1st metal member 1a is provided. And the 2nd metal member 1b, you may cut using a cutting tool, and may form the recessed groove K50.

The shape and dimensions of the first metal member 1a and the second metal member 1b are not particularly limited, but at least the thicknesses in the butt portion J51 are preferably the same.

(2) side welding process

As shown in FIG. 41, the side welding step is performed by welding the first concave grooves K50 and K50 from the first side C and the second side D of the joint structure 51. It is a process of filling the weld metal T51 in the recessed grooves K50 and K50.

In the side welding step, as shown in FIG. 41, padding welding such as TIG welding or MIG welding is performed in the concave grooves K50 and K50 from the first side surface C and the second side surface D, respectively. The weld metal T51 is filled in the concave grooves K50 and K50. Thereby, the joining structure 51 in which the end surface 11a of the 1st metal member 1a and the end surface 11b of the 2nd metal member 1b were joined is formed.

In addition, a side welding process is not limited to TIG welding or MIG welding, You may perform another well-known welding. In addition, although a welding material may differ from the joining structure 51, in this embodiment, the same material is used.

Moreover, in the side welding process, after filling the weld metal T51 to each recessed groove K50 and K50, the part which is raised rather than the 1st side surface C and the 2nd side surface D of the joining structure 51 is raised. It is preferable to cut off the weld metal T51.

(3) First main bonding step

As shown in FIG. 45, the first main bonding step is performed from the surface A of the bonding structure 51 with respect to the butt portion J51 of the first metal member 1a and the second metal member 1b. It is a process of performing friction stir welding.

The first main joining step includes a temporary joining step of temporarily joining the abutting part J51, a preliminary hole forming step of forming a preliminary hole in advance at an insertion scheduled position of the main joining rotary tool G, and the abutting part J51. ), The present bonding step of performing friction stirring.

As shown in FIG. 43, the temporary joining step is performed by moving the temporary joining rotary tool F along the joints of the first metal member 1a and the second metal member 1b to form the butt portion J51. It is a process of performing friction stirring with respect to.

In the bonding process, first, as shown in (a) of FIG. 42, the start position of the friction stir is set to the second side (D) side of the weld metal (T51) of (S _P1) (see Fig. 43) just above the placing a bonding tool rotation (F) and for, this will be pressed against the joining rotation tool (F) to fall while rotating stir pin (F2) to the starting position (S _P1) for the.

When the stirring pin F2 contacts the surface of the weld metal T51, the metal around the stirring pin F2 plasticizes and fluidizes by frictional heat, and as shown in FIG.42 (b), the stirring pin ( F2) is inserted into the weld metal T51.

When the whole stirring pin F2 enters the welding metal T51, and the whole surface of the lower end surface F11 of the shoulder part F1 contacts the surface of the welding metal T51, the rotating tool F for temporary welding While rotating, it moves toward the end position E _P2 provided in the welding metal T51 by the side of 1st side surface C (refer FIG. 43).

When the temporary joining rotary tool F is moved, the metal around the stirring pin F2 is plastically fluidized one by one, and the metal which was plastically fluidized is hardened again at the position away from the stirring pin F2.

And as shown in FIG. 43, by passing the joint of the 1st metal member 1a and the 2nd metal member 1b, and moving the _temporary welding rotation tool F toward the end position E _P2 , Friction stirring is performed over the entire length of the butt portion J51.

Thereafter, when the temporary welding rotary tool F reaches the end position E _P2 , the temporary welding rotary tool F is raised while rotating the temporary welding rotary tool F to detach the stirring pin F2 from the surface of the weld metal T51. Let's do it.

As shown in FIG.45 (a), a preliminary hole formation process is a process of forming preliminary hole P1 in advance at the insertion scheduled position of this joining rotary tool G. FIG. In the preliminary hole forming step, the hollow hole formed when the stirring pin F2 of the temporary welding rotary tool F is separated from the end position E _P2 is expanded to a weld metal T51 by expanding the diameter with a drill or the like. The preliminary hole P1 is formed in the set end position E _P2 (refer FIG. 43). This preliminary hole P1 is provided in order to reduce the press-in resistance of the stirring pin G2 of this bonding tool G for rotation. In addition, the end position E _P2 of friction stirring in the provisional bonding process of this embodiment becomes the starting position S _P3 of friction stirring in this bonding process demonstrated later.

This bonding process is a process of performing friction stirring along the butt | matching part J51 exposed to the surface A of the bonding structure 51, as shown in FIG.

First, as shown in Figure 45 (a), and places the first side (C) the joint rotation for just above the start position (S _P3) set in the weld metal (T51) at the side of tool (G), Subsequently, the tip of the stirring pin G2 is inserted into the preliminary hole P1 while the rotary tool G for joining is rotated, and the stirring pin G2 enters the weld metal T51. As a result, the metal around the stirring pin G2 is plasticized and fluidized.

In addition, as shown in FIG.45 (b), the whole of the stirring pin G2 enters the welding metal T51, and the whole surface of the lower end surface G11 of the shoulder part G1 is a welding metal T51. ), The bonding rotary tool G is moved toward the end position E _P4 set in the weld metal T51 on the second side D side while performing friction stir. In addition, in this embodiment, although the starting position S _{P1 in the} said _temporary joining process is set to the end position E _P4 of the friction stirring in this joining process, it does not necessarily need to match.

When the joining rotary tool G is moved, the metal around the stirring pin G2 is plasticized in turn, and at the position away from the stirring pin G2, the metal that has been plasticized is cured again and the surface is hardened. Side plasticization area | region W51 is formed.

When there exists a possibility that the heat input amount to the joining structure 51 may become excessive, it is preferable to cool by supplying water from the surface A side to the circumference | surroundings of this joining rotary tool G. In addition, when coolant enters between the 1st metal member 1a and the 2nd metal member 1b (refer FIG. 44), there exists a possibility that an oxide film may generate | occur | produce in a joining surface, but in this embodiment, a temporary joining process is performed, Since the joint between the 1st metal member 1a and the 2nd metal member 1b is occluded, it is difficult for cooling water to enter a junction part of the joining structure 51, and there is no possibility of deteriorating the quality of a junction part.

As shown in FIG. 44, it joins by passing the joint of the 1st metal member 1a and the 2nd metal member 1b, and moving this joining rotation tool G toward the end position E _P4 . Friction stirring is performed over the entire length of the part J51.

When the joining rotary tool G reaches the end position E _P4 , the joining rotary tool G is raised while rotating the joining rotary tool G to detach the stirring pin G2 from the surface of the weld metal T51. When the stirring pin G2 is separated upwards, an empty hole Q2 having a shape substantially the same as the stirring pin G2 is formed at the end position E _P4 (see FIG. 45C).

(4) First repair process

As shown in (c) of FIG. 45, a 1st repair process is a metal member for charge h in the empty hole Q2 formed when the main assembly rotary tool G detached in the 1st main joining process. ), And as shown in FIG. 46, the temporary tool rotation tool F for the joining part 51 and the butt | matching part J52 of the filling metal member h as shown in FIG. The welding metal T52 is applied to the empty hole Q3 formed when the repairing joining step of carrying out friction stir using the step and the rotating tool F for temporary joining in the repair joining step as shown in FIG. It includes a repair welding process to fill.

In the filling metal member insertion step, as shown in FIG. 45C, the filling metal having the same shape as the empty hole Q2 is formed in the empty hole Q2 formed on the surface of the weld metal T51 on the left side. It is a process of inserting the member h and filling the empty hole Q2. In the present embodiment, the filling metal member h is formed of a metal material having the same composition as that of the joining structure 51, but any metal material capable of friction stirring may be used.

As shown in FIG. 46, the repair joining step is a rotational tool F for temporary welding with respect to the butt portion J52 between the joining structure 51 (welding metal T51) and the filling metal member h. The friction stir is performed using.

In the repair joining process, the stirring of the rotating tool F for _temporary joining is performed at the starting position S _P5 of the friction stirring set on the joint of the joining structure 51 (welding metal T51) and the filling metal member h. Friction stirs over the entire circumference of the butt part J52 by allowing the pin F2 to enter and moving the temporary joining rotary tool F along the joint of the joining structure 51 and the filling metal member h. Is done.

In addition, since the friction stir welding in a repair joining process is substantially equivalent to the friction stir welding performed in the 1st main joining process, the detailed description is abbreviate | omitted.

In addition, in this embodiment, after performing friction stirring over the whole circumference of the butt | matching part J52, the provisional joining rotary tool F is set to the end position E _P6 of friction stirring (the friction stirring in this joining process. End position E _P4 ], and the temporary welding rotary tool F is disengaged from the position of the end position E _P6 . In this way, the end position when stirred leaving the pin (F2) to the upper side in (E _P6), the end position (E _P6) stirring pin (F2) substantially perforated (Q3) of the same type and this is formed (see FIG. 47 ).

Here, in this embodiment, although the rotational tool F for temporary joining used in the temporary joining process is used in order to frictionally stir the joining part 51 of the joining structure 51 and the filling metal member h, the joining is used. Other rotary tools may be used as long as the stirring pin can move in the circumferential shape along the joint of the structure 51 and the filling metal member h.

In the repair welding process, as shown in FIG. 47, a padding welding, such as TIG welding or MIG welding, is performed in the hollow hole Q3 formed in the surface of the welding metal T51 on the left side, and welding in the hollow hole Q3 is carried out. The metal T52 is charged.

In addition, a repair welding process is not limited to TIG welding or MIG welding, You may perform another well-known welding. In addition, although a welding material may differ from the joining structure 51, in this embodiment, the same material is used.

In addition, in the repair welding step, after filling the weld hole T52 in the hollow hole Q3, it is preferable to cut off the weld metal T52 of the part which is raised rather than the surface A of the joining structure 51.

(5) 2nd main bonding process

As shown in FIG. 48, the second main joining step is performed from the rear surface B of the joining structure 51 with respect to the butt portion J52 of the first metal member 1a and the second metal member 1b. It is a process of performing friction stir welding.

The second main joining step includes a temporary joining step of temporarily joining the abutting part J51, a preliminary hole forming step of forming a preliminary hole in advance at an insertion scheduled position of the main joining rotary tool G, and the abutting part J51. ), The present bonding step of performing friction stirring.

 In the second main bonding step, when the first repair process is completed, the joining structure 51 is once removed from the friction stirring device (not shown), and the temporary bonding step is performed in a state where the rear surface B is upwardly fixed again. A preliminary hole formation process and this joining process are performed. In addition, since each process in a 2nd main bonding process is equivalent to each process of a 1st main bonding process, the description is abbreviate | omitted.

(6) 2nd repair process

As shown in FIG. 48, the 2nd repair process is a filling metal member insertion process of filling the filling metal member h in the empty hole Q2 formed in the 2nd main joining process, and the joining structure 51 ) And a repair welding step of performing friction stirring on the abutting portion J52 of the filling metal member h, and a repair welding step of filling the weld metal T52 into the empty hole Q3 formed in the repair bonding step. It is to include. In addition, since each process in a 2nd repair process is equivalent to each process of a 1st repair process, the description is abbreviate | omitted.

As described above, as shown in FIG. 39, the joint structure 51 in which the end face of the first metal member 1a and the end face of the second metal member 1b are joined to each other is formed.

According to the manufacturing method of the present embodiment, as shown in FIG. 39, the welding structure 51 is relatively easily formed by welding the butt portions J51 exposed to the side surfaces C and D of the bonding structure 51. ) Can be joined.

In addition, in each maintenance process, as shown in FIG. 47 and FIG. 48, the filling metal member h is filled in the empty hole Q2 of the rotation tool G for this joining, and it is in the end position of friction stirring. Since the formed hollow hole Q2 is filled, the fall of the strength of the junction site by the hollow hole Q2 can be prevented. That is, since the end position of friction stirring can be provided in the joining structure 51, and the tab material for setting the end position of friction stirring can be omitted, the number of steps in the joining operation can be reduced.

Moreover, in each repair process, the abutting part J52 of the joining structure 51 and the filling metal member h is friction-stirred, and the joining structure 51 and the filling metal member () are joined at this abutting part J52. Since h) becomes a kneaded body, the airtightness and water tightness in the junction part of the 1st metal member 1a and the 2nd metal member 1b can be improved.

In addition, as shown in FIG. 39, the welding metal T51 is filled in the concave grooves K50 and K50 formed in the side surfaces of the joining structure 51, whereby welding can be performed to the inside of the joining structure 51. Since the welding range becomes wider, the strength of the joining site can be increased and the airtightness and water tightness of the joining site can be improved.

In addition, as shown in FIG. 43, before performing each joining process, the butt | matching part by press-fitting the butt | matching part J51 by press-fitting this bonding rotary tool G to the butt | matching part J51 ( Opening of J51) can be prevented, and each joining process can be performed suitably.

In addition, in each joining process, as shown in FIG.45 (a), the preliminary hole P1 is formed in advance in the insertion planned position of this joining rotary tool G, and this joining rotary tool G is shown. It is possible to reduce the indentation resistance when the indentation to the bonding structure 51. Thereby, while the precision of friction stir welding can be improved, joining can be performed quickly.

In addition, as shown in FIG. 47 and FIG. 48, the empty hole Q3 which fills and fills the empty hole Q3 formed at the time of leaving | separating the temporary welding rotary tool F in each maintenance process, and fills an empty hole The fall of the strength of the joining site by (Q3) can be prevented, and the joining site can be finished flat.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A design change is possible suitably in the range which does not deviate from the meaning.

For example, in this embodiment, as shown in FIG. 44, the starting position S _P3 of friction stirring and the end position () of the friction stir on the surface of the welding metal T51, T51 provided in the both sides of the joining structure 51 Although E _P4 is set, you may set the start position and end position of friction stirring on the boundary of the butt | matching part J51 and weld metal T51, T51.

In addition, as shown in FIG. 49, the start position S _P7 and the end position E _P8 of friction stirring are set to any one of the surface 12a, 12b of each metal member 1a, 1b (FIG. 49). In the second metal member 1b], the surface-side plasticized region W51 may be formed in an inverted shape.

In addition, in this embodiment, as shown in FIG. 39, although the recessed recessed grooves K50 and K50 are formed in the both sides C and D of the joining structure 51, the joining structure shown in FIG. As shown in Fig. 51, the concave grooves K51 'and K51' having a triangular cross section may be formed on both side surfaces C and D of the joining structure 51, and the shape of the concave groove is not limited.

In addition, in this embodiment, as shown to FIG. 40 (a), the notch 16a, 17a is formed in the 1st metal member 1a, and the notch 16b, is formed in the 2nd metal member 1b. By forming 17b), although the recessed grooves K50 and K50 are comprised, you may comprise a recessed groove by forming a notch in one of the 1st metal member 1a or the 2nd metal member 1b.

Moreover, in the manufacturing method of this embodiment, the surface side plasticization area | region W51 formed in the surface A in a 1st main bonding process, and the back surface side plasticization area | region formed in the back surface B in a 2nd main bonding process. You may overlap (W52). In this structure, since it is plasticized to the inside of the butt | matching part J51 of the 1st metal member 1a and the 2nd metal member 1b, it is the junction part of the 1st metal member 1a and the 2nd metal member 1b. The airtightness and water tightness in can be improved.

[Eighth Embodiment]

Next, an eighth embodiment of the present invention will be described.

As for the joining method which concerns on 8th Embodiment, as shown in FIG. 50, the joint member U is inserted into the hollow part formed facing the 1st metal member 1a and the 2nd metal member 1b, The friction stir is performed on the abutment portions of the first metal member 1a, the joint member U, and the second metal member 1b, and the joint member U, and the first metal member 1a and the second metal member ( Welding is performed on the side surface of 1b). First, the 1st metal member 1a and the 2nd metal member 1b concerning the joining method which concern on this embodiment are demonstrated in detail.

As shown in Figs. 51A and 51B, in the present embodiment, the first metal member 1a and the second metal member 1b each having a recess V formed on the end face 16, respectively; The joint member U inserted into the hollow portion formed by abutting the first metal member 1a and the second metal member 1b is used.

The 1st metal member 1a shows a rectangle seen from the cross section, and the recessed part V of the rectangle is formed in the end surface 16 as seen from the cross section which continues toward the back surface 13 from the surface 12. The second metal member 1b is a metal member formed in a shape approximately equal to the first metal member 1a. The recessed part V formed in the 2nd metal member 1b is formed facing the recessed part V of the 1st metal member 1a. The hollow part is formed by bringing together the end surfaces 16 and 16 of the 1st metal member 1a and the 2nd metal member 1b.

The 1st metal member 1a and the 2nd metal member 1b are metal materials of the same composition in this embodiment, For example, aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy The friction material is made of a metal material.

The joint member U represents a rectangular parallelepiped as seen in cross section. The width q ₁ of the joint member U is formed almost equal to the width p ₁ of the recess V of the first metal member 1a. Also, q _2/2 one-half of the length (q ₂₎ of the joint member (U) is, the length (p ₂₎ and is formed to be substantially equal to the recess (V) of the first metal member (1a) . In addition, the thickness q ₃ of the joint member U is formed substantially equal to the thickness p ₃ of the recess V of the first metal member 1a. In other words, as shown in FIG. 51B, the joint member U is inserted such that there is almost no gap in the hollow portion formed to face the first metal member 1a and the second metal member 1b. In the present embodiment, the joint member U is made of the same material as the first metal member 1a.

Here, the member formed by inserting the joint member U into the hollow part which formed the 1st metal member 1a and the 2nd metal member 1b, is also called the to-be-joined metal member 71. FIG. In addition, the surface of the to-be-joined metal member 71 is also called the surface A, the back surface B, the one side surface 1st side C, and the other side surface 2nd side D. FIG. In addition, the top, bottom, left, and right back and forth in this embodiment follow the arrow of FIG.

51 (b) and 52, on the surface A of the to-be-joined metal member 71, the butt | matching part which the 1st metal member 1a and the 2nd metal member 1b met, J70) is formed. Moreover, the abutting part of the 2nd side surface D side among the two abutting parts J70 through the joint member U is also called 1st abutting part J70a, and the abutting part of the 1st side surface C side Also called 2nd abutting part J70b.

The surface A of the metal member 71 to be joined includes one joint abutting portion J71 in which the joint member U and the second metal member 1b abut, the joint member U, and the first metal. The other joint butt | matching part J72 which the member 1a opposes is formed.

As shown in FIG. 52, the 1st tab material 2 and the 2nd tab material 3 are arrange | positioned so that the abutting part J70 of the to-be-joined metal member 71 may be interposed, and the to-be-joined metal member ( 71, it covers and covers the seam (boundary line) of the 1st metal member 1a and the 2nd metal member 1b which appear in the 1st side surface C and the 2nd side surface D. As shown in FIG. Although there is no restriction | limiting in particular in the material of the 1st tab material 2 and the 2nd tab material 3, In this embodiment, it is formed with the metal material of the same composition as the metal member 71 to be joined. The shape and dimensions of the first tab member 2 and the second tab member 3 are not particularly limited, but in the present embodiment, the thickness of the metal member 71 to be joined in the fitting portion J70 is measured. It is made the same as a dimension.

Hereinafter, the bonding method which concerns on this embodiment is demonstrated in detail. The joining method which concerns on this embodiment is (1) 1st preparatory process, (2) 1st preliminary process, (3) 1st main bonding process, (4) 2nd preliminary process, and (5) 2nd main bonding process. And (6) side welding processes.

(1) 1st preparation process

A first preparation step will be described with reference to FIGS. 51 and 52. The first preparation step is a step of forming the joined metal member 71 and arranging the tab member. In this embodiment, the first preparatory step is a butt step in which the joint member U is inserted into the hollow portion against the first metal member 1a and the second metal member 1b, and the metal member 71 to be joined. The tab member arrangement | positioning process which arrange | positions the 1st tab member 2 and the 2nd tab member 3 in the both sides of the butt | matching part J70 of this is provided.

In the butting step, as shown in Figs. 51 and 52, the end face 16 of the second metal member 1b is brought into close contact with the end face 16 of the first metal member 1a, and the concave is opposed to each other. The joint member U is inserted into the hollow portion formed by the portions V and V. FIG.

Moreover, the surface 12 of the 1st metal member 1a and the surface 12 of the 2nd metal member 1b are made into the surface of the same height, and also the back surface 13 and the agent of the 1st metal member 1a are made. The back surface 13 of the 2 metal member 1b is made into the surface of the same height. In addition, similarly, the 1st side surface 14 of the 1st metal member 1a and the 1st side surface 14 of the 2nd metal member 1b are made into the surface of the same height, and the 1st side of the 1st metal member 1a The 2nd side surface 15 and the 2nd side surface 15 of the 2nd metal member 1b are made into the surface of the same height. Moreover, the surface of the joint member U is made into the surface of the same height as the surface 12 of the 1st metal member 1a, and the surface 12 of the 2nd metal member 1b. Similarly, the back surface of the joint member U is made into the surface of the same height as the back surface 13 of the 1st metal member 1a, and the back surface 13 of the 2nd metal member 1b.

In the tab material arrangement step, as shown in FIG. 52, the second tab material 3 is disposed so as to cover and cover the butt portion J70 appearing on the first side surface C side, and the contact surface is disposed on the first side surface C. As shown in FIG. Contact with. Moreover, the 1st tab material 2 is arrange | positioned so that the butt | matching part J70 shown in the 2nd side surface D may be covered, and the contact surface will contact the 2nd side surface D. As shown in FIG. At this time, the surface of the 1st tab member 2 and the surface of the 2nd tab member 3 are made into the surface of the same height as the surface A of the to-be-joined metal member 71, and the back surface of the 1st tab member 2 The back surface of the 2nd tab material 3 is made into the surface of the same height as the back surface B of the to-be-joined metal member 71. FIG.

When the 1st tab material 2 and the 2nd tab material 3 are arrange | positioned, the to-be-entry part 2a, 2a formed by the to-be-joined metal member 71 and the 1st tab material 2 will be welded, and the to-be-joined metal member ( 71 and the first tab member 2 are temporarily joined. Moreover, the to-be-entangled parts 3a and 3a formed by the to-be-joined metal member 71 and the 2nd tab material 3 are welded, and the to-be-joined metal member 71 and the 2nd tab material 3 are temporarily joined. Moreover, welding may be performed continuously over the full length of the recessed corner part 2a, 2a, and 3a, 3a, and may be interrupted and welded.

(2) first preliminary step

The first preliminary step is a step performed before the first main joining step, and in the present embodiment, the surface A of the joined metal member 71 on the surface A side of the joined metal member 71. Temporary joining process which performs temporary joining with respect to each butt | matching part shown in the following, and a preliminary hole formation process which forms a preliminary hole in the starting position of friction stirring in a 1st main joining process are included.

In the provisional bonding process, as shown in FIG. 53, one temporary welding rotation tool F is moved so that the movement trace (bead) of one brush stroke may be formed, and the 1st tab member abutting part J2 and the 2nd Continuously with respect to the tab member butt part J3, butt part J70 (the first butt part J70a and the second butt part J70b), one joint butt part J71, and the other joint butt part J72. Friction stirring is performed. That is, the movement to the stirring pin end without being hung up and fall off the (F2) position (E _P1) of the joining rotation tool (F) for insertion in a starting position (S _P1) of the friction stir. In this embodiment, defines a position of the first taepjae start position of the friction stir in (2) (S _P1) and an end arranged to position (E _P1). However, the starting position (S _P1) and end position (E _P1) It is not intended to be. In addition, in this embodiment, all the rotational directions of the temporary welding rotary tool F and this bonding rotary tool G shall perform right rotation. Thus, the labor of work can be reduced by unifying the rotation direction of the temporary welding rotary tool F and this bonding rotary tool G.

The procedure of the temporary bonding process of this embodiment is demonstrated in more detail with reference to FIG. 53 (a) and (b).

In this embodiment, a provisional bonding process is the 1st tab material joining process which joins the 1st tab material abutting part J2 of the to-be-joined metal member 71 and the 1st tab material 2, and the to-be-joined metal member 71 of The first temporary joining step of temporarily joining the butt portion J70 and one joint butt portion J71, and the second tab member butt portion J3 between the joined metal member 71 and the second tab member 3 are joined. 2nd tab material joining process, and the 2nd provisional joining process of temporarily joining the butt | matching part J70 of the to-be-joined metal member 71 and the other joint abutting part J72.

First taepjae bonding step, as shown in (a) of Figure 53, is directly above the first taepjae (2) the starting position (S _P1) provided in place of the position the joining rotation tool (F) for, It continues to put pressure on the joint while the right rotary tool (F) for initiation by the stirring pins (F2) lowered position (S _P1). Although the rotational speed of the temporary welding rotary tool F is set according to the dimension and shape of the stirring pin F2, the material, thickness, etc. of the to-be-joined metal member 71 to be friction-stirred, most are 500-2000 ( rpm).

When the stirring pin F2 is in contact with the surface of the first tab member 2, the metal around the stirring pin F2 is plasticized and fluidized by frictional heat, and the stirring pin F2 is inserted into the first tab member 2. do.

When the whole of the stirring pin F2 enters the 1st tap material 2 and the whole surface of the lower end surface F11 of the shoulder part F1 contacts the surface of the 1st tap material 2, (a) of FIG. As shown in Fig. 2), the temporary tool is relatively moved toward the starting point s1 set on the first tab member butt portion J2 while the temporary joining rotary tool F is rotated.

The moving speed (feeding speed) of the rotational tool F for provisional joining is set according to the dimension and shape of the stirring pin F2, the material, thickness, etc. of the to-be-joined metal member 71 etc. which are friction-stirred, but most are It is set in the range of 100-1000 (mm / min). The rotational speed at the time of the movement of the temporary welding rotary tool F is the same as the rotational speed at the time of insertion, or it is made slower than that. In addition, when moving the temporary welding rotary tool F, you may incline the axis line of the shoulder part F1 to the rear side of a traveling direction with respect to a perpendicular line slightly, but if it sets it to vertical without making it incline, the temporary welding rotary tool F Direction change becomes easy, and complicated movement becomes possible. When the temporary joining rotary tool F is moved, the metal around the stirring pin F2 is plastically fluidized one by one, and the metal which was plastically fluidized is hardened again at the position away from the stirring pin F2.

When the rotational tool F for temporary joining is relatively moved and friction stirring is performed to the starting point s1 on the first tab member abutting part J2, the temporary joining rotating tool F is removed without leaving the temporary joining rotational tool F at the starting point s1. 1 Transfer to the tap material joining process.

In the first tab member joining step, friction stirring is performed on the first tab member butt portion J2 formed by the first tab member 2 and the metal member 71 to be joined. Specifically, the route of friction stir is set on the joint (boundary line) of the to-be-joined metal member 71 and the 1st tab material 2, and the relative rotational tool F for temporary joining is moved along the said route, 1 Friction stirring is performed with respect to the tab member butt | matching part J2. That is, when the temporary joining rotary tool F reaches the starting point s1, without returning the temporary joining rotary tool F, the return point s2 set on the one end side on the first tab member abutting part J2 as it is. Move to). Then, after turning the temporary joining rotary tool F at the return point s2 to the opposite side, the temporary joining rotary tool F is moved toward the return point s3 set on the other end side of the first tab member abutting part J2. Let's do it. Then, at the return point s3, the temporary joining rotary tool F is turned to the opposite side and then moved to the starting point s1.

When the temporary welding rotary tool F reaches the origin s1, it transfers to a 1st temporary joining process as it is. As shown in FIGS. 53A and 53B, in the first provisional joining process, the first butt portion J70a, one joint butt portion J71, and the second butt portion of the metal member 71 to be joined are joined. Temporarily join (J70b). That is, when the temporary joining rotary tool F reaches the starting point s1, friction stirring is performed along the first abutting portion J70a, and the joint member U, the first metal member 1a, and the second metal are carried out. The temporary joining rotation tool F is moved to the starting point s4 which the member 1b opposes. And the temporary joining rotary tool F is moved as it is along one joint abutting part J71, without leaving the temporary joining rotary tool F from the origin s4.

When the temporary joining rotary tool F reaches the starting point s5 where the joint member U, the first metal member 1a, and the second metal member 1b face each other, the second abutting portion J70b is moved. Thus, the temporary welding rotary tool F is moved. And when the provisional rotation rotary tool F reaches | attains the starting point s6 set on the 2nd tab material abutting part J3, it will transfer to a 2nd tap material joining process as it is.

In the second tab member joining step, friction stirring is performed on the second tab member butt portion J3 formed by the second tab member 3 and the joined metal member 71. That is, when the temporary joining rotary tool F reaches the origin s6, the return point s7 set on the one end side of the 2nd tab member abutting part J3 as it is, without leaving the temporary joining rotary tool F. Move to). Then, after turning the temporary joining rotation tool F to the opposite side at the return point s7, the temporary joining rotation tool F is moved toward the return point s8 set on the other end side of the second tab member abutting part J3. Let's do it. Then, at the return point s8, the temporary splicing rotation tool F is turned to the opposite side, and then moved to the starting point s6.

When the temporary joining rotation tool F reaches the origin s6, it transfers to a 2nd temporary joining process as it is. In a 2nd provisional joining process, the 2nd butt | matching part J70b of the to-be-joined metal member 71, the other joint abutment part J72, and the 1st butt | matching part J70a are temporarily bonded. That is, when the temporary joining rotation tool F reaches the origin s6, it moves to the origin s5 along the 2nd butt | matching part J70b, without leaving the temporary joining rotation tool F. FIG. Then, when the temporary joining rotary tool F reaches the starting point s5, the temporary joining rotary tool F is moved along the other joint butt portion J72 as it is.

When the temporary joining rotary tool F reaches the starting point s4, the temporary joining rotary tool F is moved along the first abutting part J70a to traverse the first tab member abutting part J2. To the first tab member 2. Finally, when the temporary joining rotary tool F reaches the end position E _P1 , the temporary joining rotary tool F is disengaged.

Further, when the stirring pin F2 of the temporary welding rotary tool F enters the first tab member butt portion J2 and the second tab member butt portion J3, it tries to separate the metal member 71 and both tab members to be joined. Although a force to act is applied, the welded metal parts 71 and the indented corner portions 2a and 3a formed by the first tab member 2 and the second tab member 3 are temporarily joined by welding. The gap between the member 71, the first tab member 2 and the second tab member 3 does not occur.

Thus, by performing the temporary joining process by the method of drawing a brush, each butt | matching part shown in the surface A of the to-be-joined metal member 71 can be temporarily joined.

When the provisional bonding process is complete | finished, a preliminary hole formation process is performed. In a preliminary hole formation process, it is a process of forming a preliminary hole in the starting position S _M1 of friction stirring in the 1st main joining process demonstrated later. The preliminary hole is provided for the purpose of reducing the insertion resistance (pressing resistance) of the stirring pin G2 of the rotary tool G for the present bonding. In the present embodiment, the stirring pin F2 of the rotary tool F for temporary joining is provided. It is formed by expanding the diameter with a drill or the like (not shown) for the empty hole formed when the hole is separated from the hole.

(3) First main bonding step

In the first main joining step, the abutting part J70 (the first abutting part J70a, the second abutting part J70b) and the one joint abutting part on the surface A side of the metal member 71 to be joined. It is a process of joining J71 and the other joint abutting part J72 in earnest. That is, in the 1st main joining process which concerns on this embodiment, friction stirring is performed from the surface A side of the to-be-joined metal member 71 of the temporary welding state using the rotation tool G for this bonding.

In the first main joining step, as shown in FIGS. 54A and 54B, the stirring pin of the rotary tool G for joining in the preliminary hole (not shown) formed in the starting position S _M1 . After inserting (pressing) G2 and moving the inserted stirring pin G2 to the return point O _M1 without detaching it halfway, it reciprocates to the end position E _{M1 as} it is.

Here, at the time point which the said temporary joining process was complete | finished, the friction stirring apparatus provided with the rotational tool F for temporary joining is immediately above the end position E _P1 of the 1st tab material 2 (FIG. 53 (b). ), The first bone bonding step can be performed without moving the friction stir device provided with the rotary tool G for the main bonding, when the starting position of the first bone bonding step is S _M1 . Simplify your work. In this embodiment the position of the first taepjae start position of the friction stir in (2) (S _M1) and the end position but provided the (E _M1), the starting position (S _M1) and the end position (E _M1) It is not intended to be limiting.

The first main bonding step will be described in more detail with reference to FIGS. 54A and 54B.

First, as shown to (a) of FIG. 54, the joining rotary tool G is located directly above start position S _M1 , and it is lowered, turning this joining rotary tool G to the right. The tip end of the stirring pin G2 is inserted into a spare hole. When the stirring pin G2 enters the preliminary hole, the peripheral surface (side surface) of the stirring pin G2 contacts the hole wall of the preliminary hole, and the metal is plastically fluidized from the hole wall. In this state, the plasticized fluidized metal is pushed out from the circumferential surface of the stirring pin G2, and the stirring pin G2 is press-fitted, thereby reducing the indentation resistance in the initial step of press-fitting. Further, since the stirring pin G2 contacts the hole wall of the preliminary hole before the shoulder portion G1 of the present rotary tool G contacts the surface of the first tab member 2, frictional heat is generated. It becomes possible to shorten the time until doing so. That is, it becomes possible to reduce the load of the friction stir device, and further shorten the work time required for the present bonding.

When the whole of the stirring pin G2 enters the 1st tap material 2 and the whole surface of the lower end surface G11 of the shoulder part G1 contacts the surface of the 1st tap material 2, (a) of FIG. As shown in Fig. 2), the rotary tool G for bonding is relatively moved toward the starting point s1 of the first tab member abutting portion J2 of the metal member 71 to be joined while performing friction stirring. 1 A tab material butt | matching part J2 is made to cross, and it intrudes into a 1st butt | matching part J70a. When the rotary tool G for joining is moved, the metal around the stirring pin G2 will plasticize in turn, and at the position away from the stirring pin G2, the metal which was plasticized and hardened again will harden | cure again, A formation region (hereinafter, referred to as "surface side plasticization region W71") is formed.

The moving speed (feeding speed) of the rotary tool G for joining is set according to the size and shape of the stirring pin G2, the material and the thickness of the to-be-joined metal member 71, and the like, which are friction-stirred. It is set in the range of 30-300 (mm / min).

When there exists a possibility that the heat input amount to the to-be-joined metal member 71 may become excessive, it is preferable to cool by supplying water from the surface A side to the circumference | surroundings of this bonding rotary tool G, and the like. In addition, when coolant enters between the 1st metal member 1a and the 2nd metal member 1b, there exists a possibility that an oxide film may generate | occur | produce in a joining surface. However, in this embodiment, a joint is performed and a joint is closed by closing a joint. Therefore, cooling water is hard to enter into the joint of the to-be-joined metal member 71, and there exists no possibility of deteriorating the quality of a junction part.

When the rotary tool G for this bonding reaches the origin s4, this rotary tool G for this bonding is moved along one joint abutting part J71 as it is, without leaving this rotary tool G for this bonding. Let's do it. And when this joining rotary tool G reaches the origin s5, this joining rotary tool G will be moved along 2nd abutting part J70b, and it will intrude into the 2nd tab material 3. As shown in FIG. And when this joining rotary tool G reaches the return point O _M1 set to the 2nd tap material 3, it makes the joining rotary tool G turn to the other side at return point O _M1 .

And again, this bonding rotation tool G is moved along 2nd abutting part J70b, and when this bonding rotation tool G reaches the origin s5, it will be shown in FIG. 54 (b). As described above, the joining rotary tool G is moved along the other joint abutting portion J72. And when this joining rotary tool G reaches the origin s4, this joining rotary tool G is moved along 1st abutment part J70a. Then, the joining rotary tool G is detached from the end position E _M1 by crossing the first tab member butt portion J2.

Thus, by performing the 1st main joining process by the method of brush drawing, each butt | matching part shown in the surface A of the to-be-joined metal member 71 can be joined efficiently.

In addition, in this embodiment, the start position S _M1 and the end position E of friction stirring on the extension line of the seam (boundary line) of the to-be-joined metal member 71 which appear on the surface A side of the to-be-joined metal member 71 are E _{Since M1} ) is set, the moving distance of the present rotary tool G can be minimized. Thereby, a 1st main joining process can be performed efficiently and the amount of abrasion of the main joining rotary tool G can be reduced.

The rotational speed (rotational speed at the time of removal) of the rotational tool G for this bonding when the stirring pin G2 of this rotational tool G for this bonding is separated from the end position E _M1 is rotation at the time of movement. It is preferable to make it faster than speed. In this way, since the detachment resistance of the stirring pin G2 becomes small compared with the case where the rotational speed at the time of removal is made the same as the rotational speed at the time of movement, detachment of the stirring pin G2 in the end position E _M1 . It becomes possible to carry out work quickly.

In addition, in this embodiment, although the 1st preliminary process was performed before the 1st main joining process, you may abbreviate | omit the 1st preliminary process and may perform a 1st main joining process immediately after a 1st preparatory process.

(4) second preliminary step

Although not shown concretely, a 2nd preliminary process is a process performed before a 2nd main joining process, In this embodiment, the to-be-joined metal member 71 in the back surface B side of the to-be-joined metal member 71. The temporary joining process which performs temporary joining with respect to each butt | matching part shown in the back surface B of (), and the preliminary hole formation process which forms a preliminary hole in the starting position of friction stirring in a 2nd main joining process are provided.

The second preliminary step is substantially the same as the first preliminary step described above except that the second preliminary step is performed on the back surface B side of the metal member 71 to be joined.

(5) 2nd main bonding process

Although the 2nd main joining process is not shown in figure, butt | matching part J70 in the back surface B side of the to-be-joined metal member 71, one joint butt part J71, and the other joint butt part J72 ) Is the process of joining in earnest. That is, in the 2nd main joining process which concerns on this embodiment, friction stirring is performed from the back surface B side of the to-be-joined metal member 71 of the temporarily joined state using the rotation tool G for this joining. By the 2nd main bonding process, the back surface side plasticization area | region W72 (refer FIG. 55) is formed in the back surface B of the to-be-joined metal member 71. FIG.

Since the 2nd main joining process is substantially the same as the 1st main joining process except having performed on the back surface B side of the to-be-joined metal member 71, detailed description is abbreviate | omitted. In addition, when the 2nd main bonding process is complete | finished, a tab material is excised.

Here, as in the present embodiment, when frictionally stirring the butt of the pair of metal members, a tunnel-shaped cavity defect is formed on the left side in the direction of travel when the rotary tool is rotated to the right, and on the right side in the direction of travel when the rotary tool is turned to the left. Is likely to be.

In addition, there is a possibility that an oxide film may be formed on both end sides of the surface-side plasticization region W71 and the back-side plasticization region W72. The oxide film is formed of an oxide film formed between the first side surface C and the second tab member 3 and between the second side surface D and the first tab member 2 in the interior of the metal member 71 to be joined. It is formed by winding up. Such a tunnel-shaped cavity defect and an oxide film cause a decrease in the airtightness and watertightness of the metal member 71 to be joined.

However, in the present embodiment, since the joining rotary tool G is reciprocated from the return point O _M1 to the opposite side and frictionally agitated the abutment portion J70 about twice, for example, a tunnel-shaped cavity defect is caused by frictional stirring of the royal road. Even if the oxide film is formed, the defect can be sealed and repaired by friction stirring into the ears. Thereby, the to-be-joined metal member 71 with high airtightness and watertightness can be formed.

(6) side welding process

The side welding step includes a concave groove forming step of forming concave grooves K71 and K72 on both sides of the metal member 71 to be joined, a first side welding step of welding the concave groove K71, and a concave. And a second side welding step of welding the groove K72.

In the concave groove forming step, as shown in FIGS. 55 and 56, the concave groove is formed along the butt portion J70 that appears in the first side surface C and the second side surface D of the metal member 71 to be joined, respectively. (K71, K72) are formed. The recessed grooves K71 and K72 are formed by cutting out using a known end mill or the like. The recessed grooves K71 and the recessed grooves K72 are portions in which the weld metals T71 and T72 are respectively filled in the welding step described later.

Since the recessed grooves K71 and K72 are equivalent shapes, the recessed grooves K71 will be described as an example. The concave groove K71 is rectangular in cross section, and is continuously formed from the front surface A to the rear surface B of the metal member 71 to be joined along the butt portion J70 appearing on the first side surface C. FIG. It is. As shown in FIG. 56, the width Ka ₁ of the recessed groove K71 is formed smaller than the width Wa of the front-side plasticized region W71 and the back-side plasticized region W72.

The depth of the recessed groove K71 is not specifically limited, What is necessary is just to set suitably. In addition, although the shape of the recessed grooves K71 and K72 was rectangular in cross section in this embodiment, it is not limited to this, A different shape may be sufficient as it.

In a 1st side welding process, as shown in FIG. 56, welding is performed with respect to the recessed groove K71 formed in the 1st side surface C. As shown in FIG. In the present embodiment, the welding is preferably padded by TIG welding, MIG welding, or the like. By the padding welding, the concave groove K71 can be suitably filled with the weld metal T71. Thereby, the unfired area | region (unbonded area | region) which exists between the surface side plasticization area | region W71 and the back surface plasticization area | region W72 is reliably sealed with the welding metal T71, and the intensity | strength of a junction part is raised. Can be. In addition, although the filler metal may be different from the material of the to-be-joined metal member 71, in this embodiment, the same material is used.

Moreover, it is preferable to perform the padding part ablation process which cuts out the said padding part about the part (padding part) which protrudes from the surface of the 1st side surface C among the welding metal T71 filled with padding welding. By cutting off this padding part, the surface of the 1st side surface C can be shape | molded smoothly.

In addition, in this embodiment, although the welding metal T71 was filled from the surface A to the back surface B, the unbaked area | region between the surface side plasticization area | region W71 and the back surface plasticization area | region W72 is welded at least. It should be good.

In the second side welding step, welding is performed on the concave groove K72 formed in the second side surface D. FIG. As shown in FIG. 50, the concave groove K72 is filled with the welding metal T72. The second side welding step is almost the same as the first side welding step except that welding is performed on the second side face D, so that detailed description thereof is omitted.

According to the joining method which concerns on 8th Embodiment demonstrated above, as shown in FIG. 50, the surface A and the back surface B side of the to-be-joined metal member 71 are joined by friction stirring, and a 1st Welding the side surface C and the second side surface D to weld the unfired region (unbonded region) existing between the surface side plasticization region W71 and the back side plasticization region W72 by the welding metals T71 and T72. The airtightness and watertightness between both sides of the to-be-joined metal member 71 can be improved because it is covered with and sealed.

In addition, by using the joint member U, the lengths of the surface side plasticized region W71 and the back side plasticized region W72 formed by the first bone bonding process and the second bone bonding process become large. The joining strength of the joining metal member 71 can be raised.

Moreover, in the side welding process, by forming the recessed grooves K71 and K72, the weld metals T71 and T72 can be easily filled in the recessed grooves K71 and K72. Further, by removing the padding portion protruding from the side surface of the weld metals T71 and T72, the finished surface can also be smoothed.

In addition, the width Ka ₁ of the concave grooves K71 and K72 is formed smaller than the width Wa of the front side plasticized region W71 and the back side plasticized region W72, thereby welding metals T71 and T72. It is possible to form a small amount of).

In addition, in this embodiment, since the temporary joining process and each start position S _M1 and the end position E _M1 of this joining process are the same position, friction stirring operation can be performed efficiently.

In addition, in this embodiment, although welding was performed after the recessed grooves K71 and K72 were formed, it is not limited to this, You may weld without forming a recessed groove. In addition, in this embodiment, although welding was carried out to both surfaces of the 1st side surface C and the 2nd side surface D, you may only perform only in the other one.

[Ninth Embodiment]

Next, a ninth embodiment of the present invention will be described.

As shown in Fig. 57, the ninth embodiment is formed by joining the end face of the first metal member 10a and the side surface of the second metal member 10b in an L-shape in plan view. It is different from 1 embodiment. First, the 1st metal member 10a, the 2nd metal member 10b, and the joint member U are demonstrated.

As shown in FIG. 58, the first metal member 10a has a rectangular shape when viewed from a cross section, and has a rectangular concave portion when viewed from a cross section continuous from the surface 12 to the rear surface 13 on the end surface 16. V) is formed. On the other hand, the second metal member 10b has a rectangular shape as seen from the cross section, and a rectangular recess V is formed in the first side face 14 as seen from a cross section continuous from the surface 12 to the back surface 13. . The 1st metal member 10a and the 2nd metal member 10b have the same composition, and the recessed part V formed in both has the same shape and size. By joining the end surface 16 of the 1st metal member 10a and the 1st side surface 14 of the 2nd metal member 10b, a hollow part is formed.

The joint member U represents a rectangular parallelepiped as seen in cross section. The width q ₁ of the joint member U is formed almost equal to the width p ₁ of the recess V of the first metal member 10 a. Also, q _2/2 one-half of the length (q ₂₎ of the joint member (U) is, the length (p ₂₎ and is formed to be substantially equal to the recess (V) of the first metal member (10a) . In addition, the thickness q ₃ of the joint member U is formed substantially equal to the thickness p ₃ of the recess V of the first metal member 10a. In other words, as shown in FIG. 58B, the joint member U is inserted such that there is almost no gap in the hollow portion formed to face the first metal member 10a and the second metal member 10b. In the present embodiment, the joint member U is made of the same material as the first metal member 10a.

Here, the member formed by inserting the joint member U into the hollow part which formed the 1st metal member 10a and the 2nd metal member 10b, is also called the to-be-joined metal member 80. FIG. In addition, the surface of the to-be-joined metal member 80 is called surface A, the back surface is the back surface B, one side is 1st side C, and the other side is 2nd side D. As shown in FIG. In addition, the 1st side surface C means the surface formed by the 2nd side surface 15 of the 1st metal member 10a, and the 1st side surface 14 of the 2nd metal member 10b.

As shown in FIG. 58 (b), an abutting portion J80 on which the first metal member 10a and the second metal member 10b abut on the surface A of the metal member 80 to be joined is provided. Formed. Moreover, the abutting part of the 2nd side surface D side among two abutting parts J80 through the joint member U is also called 1st abutting part J80a, and the abutting part of the 1st side surface C side Also called 2nd abutment part J80b.

In addition, on the surface A of the metal member 80 to be joined, one joint abutting portion J81 in which the joint member U and the second metal member 10b abut, the joint member U, and the first metal are joined. The other joint butt | matching part J82 which the member 10a opposes is formed.

As shown in FIG. 59, the 1st tab material 4 and the 2nd tab material 5 are arrange | positioned so that the butt | matching part J80 of the to-be-joined metal member 80 may be interposed, and the to-be-joined metal member ( 80, and covers the seam (boundary line) of the 1st metal member 10a and the 2nd metal member 10b which appear in the 1st side surface C and the 2nd side surface D, and cover. Although there is no restriction | limiting in particular in the material of the 1st tab material 4 and the 2nd tab material 5, In this embodiment, it is formed with the metal material of the same composition as the metal member 80 to be joined. The shape and dimensions of the first tab member 4 and the second tab member 5 are not particularly limited, but in the present embodiment, the thickness of the metal member 80 to be joined in the abutting portion J80 is measured. It is made the same as a dimension.

Hereinafter, the bonding method which concerns on this embodiment is demonstrated in detail. The joining method which concerns on this embodiment is (1) 1st preparatory process, (2) 1st preliminary process, (3) 1st main bonding process, (4) 2nd preliminary process, and (5) 2nd main bonding process. And (6) side welding processes.

A first preparation step will be described with reference to FIGS. 58 and 59. A 1st preparation process is a process of forming the to-be-joined metal member 80, and arrange | positioning a tab material to the to-be-joined metal member 80. FIG. In the present embodiment, the first preparatory step is a butt step in which the joint member U is inserted into the hollow portion against the first metal member 10a and the second metal member 10b, and the metal member 80 to be joined. The tab member arrangement | positioning process which arrange | positions the 1st tab material 4 and the 2nd tab material 5 on both sides of the butt | matching part J80 of this is provided.

In the butting step, as shown in FIGS. 58 and 59, the first side face 14 of the second metal member 10b is brought into close contact with the end face 16 of the first metal member 10a, and is opposed to each other. The joint member U is inserted into the hollow portion formed by the recesses V and V. As shown in FIG.

Moreover, the surface 12 of the 1st metal member 10a and the surface 12 of the 2nd metal member 10b are made into the surface of the same height, and also the back surface 13 and the agent of the 1st metal member 10a are made. The back surface 13 of the 2 metal member 10b is made into the surface of the same height. As shown in FIG. 58B, the end face 16 of the first side 14 of the first metal member 10a and the end face 16 of the second metal member 10b are the same height. Moreover, the surface of the joint member U is made into the surface of the same height as the surface 12 of the 1st metal member 10a, and the surface 12 of the 2nd metal member 10b. Similarly, the back surface of the joint member U is made into the surface of the same height as the back surface 13 of the 1st metal member 10a, and the back surface 13 of the 2nd metal member 10b. Moreover, the corner part I which entered by the 2nd side surface 15 of the 1st metal member 10a and the 1st side surface 14 of the 2nd metal member 10b is formed.

In the tab member arrangement step, as shown in FIG. 59, the first tab member 4 is disposed so as to cover the butt portion J80 appearing on the second side surface D side, and the contact surface is disposed on the second side surface D. As shown in FIG. Contact with. Moreover, the 2nd tab material 5 is arrange | positioned so that the butt | matching part J80 shown in the corner | angular part I which entered may be arrange | positioned, and the contact surface will contact the 1st side surface C. As shown in FIG. The second tab member 5 represents a rectangular parallelepiped, and is attached to the second side surface 15 of the first metal member 10a and the first side surface 14 of the second metal member 10b constituting the corner portion I. Each is in contact. At this time, the surface of the first tab member 4 and the surface of the second tab member 5 are the surfaces of the same height as the surface A of the metal member 80 to be joined, and at the same time as the back surface of the first tab member 4. The rear surface of the second tab member 5 is the surface having the same height as the rear surface B of the metal member 80 to be joined.

When the 1st tab member 4 and the 2nd tab member 5 are arrange | positioned, the to-be-entry part 4a, 4a formed by the to-be-joined metal member 80 and the 1st tab material 4 will be welded, and a metal part to be joined ( 80 and the first tab member 4 are temporarily joined. Moreover, the corner part 5a, 5a formed by the to-be-joined metal member 80 and the 2nd tab material 5 is welded, and the to-be-joined metal member 80 and the 2nd tab material 5 are temporarily joined. In addition, welding may be performed continuously over the full length of the indented corner | angular part 4a, 4a and 5a, 5a, and may be interrupted and welded.

(2) first preliminary step

The first preliminary step is a step performed before the first main joining step, and in the present embodiment, on the surface A side of the metal member 80 to be joined, the surface A of the metal member 80 to be joined. Temporary joining process which performs temporary joining with respect to each butt | matching part shown in the following, and a preliminary hole formation process which forms a preliminary hole in the starting position of friction stirring in a 1st main joining process are included.

In the temporary joining process, as shown in FIGS. 60 and 61, one temporary welding rotating tool F is moved to form a movement trajectory (bead) of one brush drawing, and the first tab member abutting part J4 is provided. To the second tab member butt portion J5, butt portion J80 (first butt portion J80a and second butt portion J80b), one joint butt portion J81 and the other joint butt portion J82. Friction stirring is performed continuously. That is, the stirring pin F2 of the temporary joining rotary tool F inserted in the starting position S _P2 of friction stirring is moved to the end position E _P2 , without leaving it in the middle. In addition, the position of this embodiment, the first taepjae start position of the friction stir in (4) (S _P2), and the end position but provided the (E _P2), the starting position (S _P2) and the end position (E _P2) It is not intended to be limiting.

The order of friction stirring in the 1st preliminary process of this embodiment is demonstrated in more detail with reference to FIG. 60 and FIG.

In this embodiment, the provisional joining step includes a first tab member joining step of joining the first tab member butt portion J4 between the metal member 80 to be joined and the first tab member 4, and the metal member 80 to be joined. The first temporary joining step of temporarily joining the butt portion J80 and one joint butt portion J81, and the second tab member butt portions J5 and J5 between the joined metal member 80 and the second tab member 5 are performed. And a second temporary joining step of temporarily joining the butt portion J80 and the other joint butt portion J82 of the metal member 80 to be joined.

In the 1st tab material joining process, as shown to FIG. 60 (a), the rotational tool F for provisional joining is located directly on the starting position S _P2 provided in place of the 1st tab material 4, , continue to be pressed against the joining rotation tool (F) stirring pin (F2) to the starting position (S _P2) to turn right, while for the descent. Although the rotational speed of the temporary welding rotary tool F is set according to the dimension and shape of the stirring pin F2, the material, thickness, etc. of the to-be-joined metal member 80 etc. which are friction-stirred, most are 500-2000 ( rpm).

When the stirring pin F2 is in contact with the surface of the first tab member 4, the metal around the stirring pin F2 is plasticized and fluidized by frictional heat, and the stirring pin F2 is inserted into the first tab member 4. do.

When the whole of the stirring pin F2 enters the 1st tap material 4, and the whole surface of the lower end surface F11 of the shoulder part F1 contacts the surface of the 1st tap material 4, (a) of FIG. As shown in Fig. 2), the temporary joining rotary tool F is rotated so as to move relative to the starting point s1 set on the first tab member abutting part J4.

When the rotational tool F for temporary joining is moved relatively and friction stirring is performed to the starting point s1 of a 1st tap material joining process, the 1st tap material joining is carried out as it is, without leaving the rotational tool F for temporary joining from the starting point s1. Go to the process.

In the first tab member joining step, friction stirring is performed on the first tab member butt portion J4 formed by the first tab member 4 and the metal member 80 to be joined. Specifically, the route of friction stir is set on the joint (boundary line) of the to-be-joined metal member 80 and the 1st tab material 4, and the relative rotational tool F for temporary joining is moved along the said route, The friction stir is performed with respect to the tab member butt portion J4. That is, when the temporary joining rotary tool F reaches the starting point s1, without returning the temporary joining rotary tool F, the return point s2 set on the one end side on the 1st tab member abutting part J4 as it is. Move to). After returning the provisional splice rotation tool F at the return point s2, the temporary splice rotation tool F is moved toward the return point s3 set at the other end side of the first tab member abutting part J4. . And after returning the provisional rotation rotation tool F from the return point s3, it moves to the origin s1.

When the temporary welding rotary tool F reaches the origin s1, it transfers to a 1st temporary joining process as it is. In a 1st provisional bonding process, the 1st butt | matching part J80a, one joint butt | matching part J81, and the 2nd butt | matching part J80b of the to-be-joined metal member 80 are temporarily bonded. That is, when the temporary joining rotary tool F reaches the origin s1, friction stirring is performed along the first abutting part J80a, and the joint member U, the first metal member 10a, and the second metal are carried out. The temporary joining rotary tool F is moved to the opposing origin s4 which the member 10b opposes. And the temporary joining rotary tool F is moved as it is along one joint abutting part J81, without leaving the temporary joining rotary tool F from the origin s4.

When the temporary joining rotary tool F reaches the starting point s5 where the joint member U, the first metal member 10a, and the second metal member 10b face each other, the second abutting portion J80b is moved. Thus, the temporary welding rotary tool F is moved. And when the temporary welding rotation tool F reaches | attains the starting point s6 set on the 2nd tab material abutting part J5, it transfers to a 2nd tap material joining process as it is.

In the second tab member bonding step, as shown in FIG. 60 (b), the second tab member butt portion J5 (J5a, J5b) formed by the second tab member 5 and the metal member 80 to be joined. Friction stirring is performed. That is, when the temporary joining rotary tool F reaches the origin s6, on the 2nd tap material abutting part J5a of the 2nd side surface 15 of the 1st metal member 10a, and the 2nd tab material 5, it will be. The temporary joining rotation tool F is moved to the set return point s7. And as shown to (a) of FIG. 61, when returning point s7 reaches the starting point s6 by turning the temporary welding rotary tool F to the opposite side, the 1st side surface of the 2nd metal member 10b ( The temporary joining rotary tool F is moved to the return point s8 set on the 2nd tab member abutting part J5b between 14) and the 2nd tab member 5.

When the temporary joining rotation tool F reaches the return point s8, it transfers to a 2nd temporary joining process as it is. In the second temporary bonding step, the second butt joint J80b, the other joint butt joint J82 and the first butt joint J80a are temporarily bonded. That is, as shown in FIG. 61 (b), when the temporary joining rotation tool F is turned to the opposite side from the return point s8, the temporary joining rotation tool F along the second abutting part J80b. To move to the starting point s5. And the rotational tool F for temporary joining is moved along the other joint abutting part J82 as it is.

Then, when the temporary joining rotation tool F reaches the starting point s4, the temporary joining rotation tool F is moved along the first abutting part J80a to cross the first tab member abutting part J4. It intrudes into the 1st tab material 4. Finally, when the temporary joining rotary tool F reaches the end position E _P2 , the temporary joining rotary tool F is detached.

Further, when the stirring pin F2 of the temporary welding rotary tool F enters the first tab member butt portion J4 and the second tab member butt portion J5, it attempts to separate the joined metal member 80 and both tab members. Although the force acts, since the metal part 80 to be joined and the corner | angular part 4a, 5a formed by the 1st tab material 4 and the 2nd tab material 5 are temporarily joined by welding, the to-be-joined metal A gap does not arise between the member 80, the 1st tab material 4, and the 2nd tab material 5. As shown in FIG.

Thus, by performing the temporary joining process by the method of drawing a brush, each butt part shown by the to-be-joined metal member 80 can be temporarily bonded.

When the provisional bonding process is complete | finished, a preliminary hole formation process is performed. In a preliminary hole formation process, it is a process of forming a preliminary hole in the starting position of friction stirring in the 1st main joining process demonstrated later. In the preliminary hole formation process which concerns on a 1st preliminary process, a preliminary hole is formed in the starting position S _M2 set in the surface of the 1st tab material 4.

(3) First main bonding step

In the first main joining step, the abutting part J80 (the first abutting part J80a, the second abutting part J80b) and the one joint abutting part on the surface A side of the metal member 80 to be joined. It is a process of joining (J81) and the other joint abutting part (J82) in earnest. That is, in the 1st main joining process which concerns on this embodiment, friction stirring is performed from the surface A side of the to-be-joined metal member 80 of the temporary joining state using the rotation tool G for main joining.

In the 1st main joining process, as shown to FIG. 62 (a) and (b), the stirring pin of the rotary tool G for joining in this starting position S _M2 set to the 1st tab material 4 is shown. After inserting (pressing in) G2 and moving the inserted stirring pin G2 to the return point O _M2 set in the second tab member 5 without detaching it in the middle, the opposite direction is returned from the return point O _M2 . It folds and moves back and forth to the end position E _{M2 as} it is. In this embodiment the position of the first taepjae start position of the friction stir in (4) (S _M2) and although providing an end position (E _M2), the starting position (S _M2) and the end position (E _M2) It is not intended to be limiting.

The first main bonding step will be described in more detail with reference to FIGS. 62A and 62B.

First, as shown to (a) of FIG. 62, the joining rotary tool G is located directly above start position S _M2 , and it is lowered, turning this joining rotary tool G to the right. Insert the tip of the stirring pin G2.

When the whole of the stirring pin G2 enters the 1st tap material 4, and the whole surface of the lower end surface G11 of the shoulder part G1 contacts the surface of the 1st tap material 4, FIG. 62 (a) As shown in Fig. 1), the rotary tool G for bonding is relatively moved toward the starting point s1 on the first tab member abutting portion J4 of the metal member 80 to be joined while performing friction stir, and the first The tab member butt portion J4 is crossed, and the tab member butt portion J4 is intruded. When the rotary tool G for joining is moved, the metal around the stirring pin G2 will plasticize in turn, and at the position away from the stirring pin G2, the metal which was plasticized and hardened again will harden | cure again, A torch region (hereinafter referred to as "surface side plasticized region W81") is formed.

When this joining rotary tool G reaches the origin s4, this joining rotary tool G is moved along one joint butt | matching part J81 as it is, without leaving this joining rotary tool G. Let's do it. And when this joining rotary tool G reaches the origin s5, this joining rotary tool G will be moved along 2nd abutting part J80b, and it will intrude into the 2nd tab material 5. And when this joining rotation tool G reaches the return point O _M2 set to the 2nd tab material 5, it will make the joining rotation tool G turn to the other side at return point O _M2 .

And again, the joining rotary tool G is moved along the 2nd butt | matching part J80b, and when it reaches the starting point s5, the joining rotary tool G is seen along the other joint butt | matching part J82. Move it. When the main joining rotary tool G reaches the starting point s4, the main joining rotary tool G is moved again along the first abutting part J80a. And finally, the joining rotary tool G is made to intrude into the 1st tab material 4, and the joining rotary tool G is disengaged from the end position E _M2 .

In addition, in this embodiment, although the 1st preliminary process was performed before the 1st main joining process, you may abbreviate | omit the 1st preliminary process and may perform a 1st main joining process immediately after a 1st preparation process.

(4) second preliminary step

Although not shown concretely, a 2nd preliminary process is a process performed before a 2nd main joining process, and in this embodiment, the to-be-joined metal member 80 in the back surface B side of the to-be-joined metal member 80. The temporary joining process which performs temporary joining with respect to each butt | matching part shown in the back surface B of (), and the preliminary hole formation process which forms a preliminary hole in the starting position of friction stirring in a 2nd main joining process are provided.

Since a 2nd preliminary process is performed substantially on the back surface B side of the to-be-joined metal member 80, since it is substantially the same as the 1st preliminary process which concerns on this embodiment, detailed description is abbreviate | omitted.

(5) 2nd main bonding process

Although the 2nd main joining process is not shown in figure, the butt | matching part J80, the one joint abutting part J81, and the other joint abutting part J82 in the back surface B side of the to-be-joined metal member 80 are not shown. ) Is the process of joining in earnest. That is, in the 2nd main joining process which concerns on this embodiment, friction stirring is performed from the back surface B side of the to-be-joined metal member 80 of the temporarily joined state using the rotation tool G for this joining.

Since the 2nd main joining process is substantially the same as the 1st main joining process of this embodiment except having performed to the back surface B side of the to-be-joined metal member 80, detailed description is abbreviate | omitted. When the 2nd main bonding process is complete | finished, a tab material is excised.

Here, as in the present embodiment, when frictionally stirring the butt of the pair of metal members, a tunnel-shaped cavity defect is formed on the left side in the direction of travel when the rotary tool is rotated to the right, and on the right side in the direction of travel when the rotary tool is turned to the left. Is likely to be.

In addition, there is a possibility that an oxide film may be formed on both end sides of the surface-side plasticization region W81 and the back-side plasticization region W82. The oxide film is formed by winding an oxide film formed between the first side surface C and the second tab member 5 and between the second side surface D and the first tab member 4 inside the to-be-joined metal member 80. To be formed. Such a tunnel-shaped cavity defect and an oxide film cause the airtightness and watertightness of the to-be-joined metal member 80 to fall.

However, in this embodiment, since the joining rotary tool G is reciprocated by returning from the return point O _M2 and friction-stirring the abutment part J80, for example, tunnel-shaped cavity defects or oxidation are caused by friction stirring of the royal road. Even if a film is formed, the defect can be sealed and repaired by frictional stirring into the ears. Thereby, the to-be-joined metal member 80 with high airtightness and watertightness can be formed.

(6) side welding process

The side welding process includes a concave groove forming step of forming concave grooves K83 and K84 on both side surfaces of the metal member 80 to be joined, a first side welding process of welding to the concave groove K83, and concave. And a second side welding step of welding the groove K84.

In the concave groove forming step, as shown in FIG. 63, the concave groove K83 along the butt portion J80 exposed to the first side C and the second side D of the joined metal member 80, respectively. , K84). The recessed grooves K83 and K84 are formed by cutting out using a known end mill or the like. The recessed grooves K83 and the recessed grooves K84 are portions in which the weld metals T83 and T84 are filled, respectively, in the welding step described later.

As shown in FIGS. 63A and 63B, the recessed groove K83 represents a rectangle in cross section and has a surface A of the metal member 80 to be joined (first metal member 10a). To the back surface B is formed continuously. The width Ka ₃ of the concave groove K83 is formed smaller than Wa / 2 which is 1/2 of the width Wa of the surface-side plasticized region W81, as shown in FIG. have.

On the other hand, in the second side surface D of the metal member 80 to be joined, the concave groove K84 is rectangular in cross section and continuously from the surface A to the rear surface B along the butt portion J80. Formed. The width Ka ₄ of the recessed groove K84 is formed to be smaller than the width Wa of the surface-side plasticized region W81, as shown in FIG.

The depth of the recessed grooves K83 and K84 is not particularly limited and may be appropriately set. In addition, although the shape of the recessed grooves K83 and K84 was rectangular from the cross section in this embodiment, it is not limited to this, A different shape may be sufficient.

In a 1st side welding process, as shown in FIG. 64, welding is performed with respect to the recessed groove K83 formed in the 1st side surface C. As shown in FIG. In the present embodiment, the welding is preferably padded by TIG welding, MIG welding, or the like. By the padding welding, the concave groove K83 can be appropriately filled with the weld metal T83. Thereby, the unfired area | region (unbonded area | region) which exists between the surface side plasticization area | region W81 and the back side plasticization area | region W82 is reliably sealed with the welding metal T83, and the strength of a junction part is raised. Can be.

It is preferable to remove the said padding part about the part (padding part) which protrudes from the surface of the 1st side surface C among the welding metal T83 filled with the padding welding. By cutting off this padding part, the surface of the 1st side surface C can be shape | molded smoothly.

In a 2nd side welding process, as shown to FIG. 64 (b), welding is performed with respect to the recessed groove K84 formed in the 2nd side surface D. FIG. The concave groove K84 is filled with the weld metal T84. The second side welding step is almost the same as the first side welding step except that welding is performed on the second side face D, so that detailed description thereof is omitted.

According to the joining method which concerns on 9th Embodiment demonstrated above, while exhibiting the effect substantially the same as 8th Embodiment, it can join suitably also when a pair of metal member is matched in L shape by planar view.

As mentioned above, although embodiment of this invention was described, the said form is an illustration and does not limit this invention. For example, the trajectory of the provisional bonding process is not limited to the said form, It may be another trajectory. In addition, it is not necessary to necessarily perform the trick of drawing a brush. In addition, although the welding employ | adopted padding welding in this embodiment, other welding methods may be sufficient.

In addition, in 8th Embodiment and 9th Embodiment, although the joint member U was formed in rectangle as seen from the cross section, you may form in a hexagon as seen from the cross section like the joint member U1 shown in FIG. 65, for example. .

[Tenth Embodiment]

Next, the joining method which concerns on 10th Embodiment of this invention is demonstrated.

66 is an overall perspective view illustrating a bonding method according to a tenth embodiment. As shown in FIG. 66, the joining method according to the tenth embodiment includes a first metal member 910a, a second metal member 910b, a first metal member 910a, and a second metal member 910b. ) Friction stir from the surface (A), the rear surface (B) with respect to the butt portion of the to-be-joined metal member (90) having a joint member (U) interposed between the first side (C) and the second side surface. Weld is performed about the butt part exposed to each of (D). Hereinafter, each process is explained in full detail. In addition, up, down, left, and right in front of this description follow the arrow of FIG.

The joining method which concerns on this embodiment is (1) abutment process, (2) 1st step part provisional joining process, (3) 1st step part main joining process, (4) joint member arrangement | positioning process, (5) surface provision It includes a joining step, (6) surface main joining step, (7) back side main joining step, and (8) side welding step.

First, the 1st metal member 910a and the 2nd metal member 910b which are two metal members are demonstrated using FIG.

The first metal member 910a and the second metal member 910b are made of a metal material capable of friction stirring, such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy. The 1st metal member 910a and the 2nd metal member 910b are members which are formed in substantially the same shape, The main-body part 90Q which is a thickness part, and the step part 90R thinly formed in the edge part of the main-body part 90Q. It is equipped with. In the following description, the side surface 911 which rises from the surface 916 of the step | step part 90R among the side surfaces 911 and 914 of the main-body part 90Q is called "raising side surface 911", and others The side surface 914 is referred to as the "exposure side surface 914". In addition, among the side surfaces 915 and 918 (refer to FIG. 67 (d)) of the stepped portion 90R, the side face 915 which faces the other stepped portion 90R is referred to as the "butting side surface 915". The outer side surface 918 is referred to as the "exposure side surface 918". The rising side 911 of the main body portion 90Q is vertically raised from the surface 916 of the stepped portion 90R in the present embodiment (see FIG. 67 (c)), and the stepped portion 90R of the stepped portion 90R. Parallel to the butting side 915 (see FIG. 67 (b)).

The stepped portion 90R is a portion smaller in thickness than the main body portion 90Q, and is formed by roughing or cutting the surface 912 of the main body portion 90Q. As shown in FIG. 67C, the surface 916 of the stepped portion 90R is located further down from the surface 912 of the main body portion 90Q, but the back surface 917 of the stepped portion 90R is located. ) Is a surface having the same height as the rear surface 913 of the main body portion 90Q. In addition, the abutting side surface 915 of the stepped portion 90R is perpendicular to the surface 916 of the stepped portion 90R. The depth dimension of the stepped portion 90R (the distance from the rising side 911 of the body portion 90Q to the butt side 915 of the stepped portion 90R) is the shoulder portion of the rotary tool G for the present bonding. It is larger than the radius (= Y _1/2 ) of G1). Although there is no restriction | limiting in particular in the magnitude | size of the thickness t _B of the step part 90R, In this embodiment, it is set to 2/3 of the thickness t _A of the main-body part 90Q.

In addition, the first metal member 910a and the second metal member 910b are also referred to simply as the metal member 910.

(1) butt process

As shown in Fig. 67, the step of joining, with the stepped portions 90R and 90R of the first metal member 910a and the second metal member 910b abutted, is abutting recess between the main body portions 90Q and 90Q. 900 is a step of forming. In the butt step, the butt side 915 of the stepped portion 90R of the second metal member 910b is brought into close contact with the butt side 915 of the stepped portion 90R of the first metal member 910a) The distance to the side surface 915 of the stepped portion 90R] is larger than the radius (= Y _1/2 ) of the shoulder portion G1 of the rotary tool G for the present bonding. Although there is no restriction | limiting in particular in the magnitude | size of the thickness t _B of the step part 90R, In this embodiment, it is set to 2/3 of the thickness t _A of the main-body part 90Q.

In addition, the first metal member 910a and the second metal member 910b are also referred to simply as the metal member 910.

(1) butt process

As shown in Fig. 67, the step of joining, with the stepped portions 90R and 90R of the first metal member 910a and the second metal member 910b abutted, is abutting recess between the main body portions 90Q and 90Q. 900 is a step of forming. In the butt step, the butt side 915 of the stepped portion 90R of the second metal member 910b is brought into close contact with the butt side 915 of the stepped portion 90R of the first metal member 910a, and the first The surface (upper surface) 916 of the stepped portion 90R of the metal member 910a and the surface (upper surface) 16 of the stepped portion 90R of the second metal member 910b are set to have the same height surface. The rear surface 917 of the stepped portion 90R of the first metal member 910a and the rear surface 917 of the stepped portion 90R of the second metal member 910b are the surfaces of the same height. The abutting part J920 is formed by abutting the stepped portions 90R of the first metal member 910a and the second metal member 910b.

In addition, when the stepped portions 90R and 90R are brought into contact with each other, the rising side 911 of one main body 90Q and the rising side 911 of the other main body 90Q will be described later. It is larger than the opposite with a gap diameter (Y ₁₎ of the shoulder portion (G1) of (G).

(2) 1st step provisional bonding process

In the first stepped part joining step, as shown in FIG. 68, the butt portion J910 between the stepped portion 90R and the one tab member 930, the butt portion J920 between the stepped portions 90R and 90R, and The abutting part J930 between the stepped portion 90R and the other tab member 940 is temporarily joined from the surface side. First, a tapping material and a rotating tool are demonstrated.

The tab members 930 and 940 are arranged to sandwich the butt portion J920 therebetween, and as shown in FIGS. 67A to 67D, the exposed side surfaces 918 of the stepped portions 90R and 90R, respectively. 918 is provided with a dimension and a shape which can cover. The tab members 930 and 940 according to the present embodiment abut not only the exposed side surfaces 918 and 918 of the stepped portions 90R and 90R but also the exposed side surfaces 914 and 914 of the main body portions 90Q and 90Q. The tab members 930 and 940 each have the same thickness dimension as the thickness dimension of the stepped portion 90R (see FIG. 67 (d)), and the front surface 916 and the back surface 917 of the stepped portion 90R. It is arrange | positioned so that it may become the surface of the same height as, and is temporarily bonded to the exposed side surfaces 914 and 914 of the main-body parts 90Q and 90Q by welding in this state. Although there is no restriction | limiting in particular in the material of the tab materials 930 and 940, In this embodiment, it is formed with the metal material of the same composition as the metal member 910. FIG. An abutting portion J910 is formed at an abutting portion of the tab member 930 and the metal member 910, and an abutting portion J930 is formed at an abutting portion of the tab member 940 and the metal member 910.

In the present embodiment, the length of the stirring pins (G2) of the joining rotation tool (G) for (L ₁₎ [in Fig. 4 (b) Reference is, the thickness (t _B) of the step portion (90R) Fig of 67 (c) reference preferably set to be 3/4 or more than 1/2 of, and it is preferable to set more preferably to satisfy the relationship that _{1.01 ≤ 2L 1 / t B ≤} 1.10 .

In the first step temporary joining step, as shown in FIG. 68, one temporary joining rotary tool F is moved to form a movement trajectory (bead) of one brush drawing, and the butt parts J910, J920, J930), friction stirring is performed continuously from the surface 916 side. That is, to move to escape without causing the stir pin (F2) of the joining rotation tool (F) for the insertion at the start of friction stir (S _P) during the end position (E _P). By performing a 1st step part temporary joining process, spreading of the tab material and the metal member 910 in the 1st step part main joining process performed later can be prevented.

In addition, although the 1st step part temporary joining process became the trajectory as shown in FIG. 68 in 1st Embodiment, it is not limited to this and may be another trajectory.

(3) First step main bonding step

1st step part In this joining process, friction stirring is performed from the surface 916 side of the step part 90R with respect to the butt | matching part J920 of a temporarily joined state using the rotation tool G for this joining. Specifically, as shown to Fig.69 (a) and (b), the stirring pin G2 of the rotation tool G for this bonding was inserted (press-in), and inserted in the starting position S _M1 . The stirring pin G2 is moved to the end position E _M1 without detaching it halfway.

When the rotary tool G for joining is moved, the metal around the stirring pin G2 will plasticize in turn, and at the position away from the stirring pin G2, the metal which was plasticized and hardened again will harden | cure again and will be made. 1st step part plasticization area | region W91 is formed. In order to repair the joining defect which may be formed in this 1st step part plasticization area | region W91, you may perform friction stirring and welding with respect to 1st step part plasticization area | region W91 as needed.

When the first step step provisional joining step and the first step part main joining step are completed, the burr generated by friction stir is removed and the surface 916 (butt recess 900) of the step step 90R is removed. Base] to make it smooth. Thereby, in the joint member arrangement | positioning process demonstrated later, the bottom face of the butt recessed part 900 and the joint member U can be made close.

(4) Joint member placement process

In the joint member disposing step, as shown in FIGS. 70A and 70B, the joint member U is inserted into the butting recess 900, and the joint member U is inserted into both main body portions 90Q,. At the same time, the pair of tab members 91 and 92 are disposed so as to face the joint member U, and the tab members 91 and 92 are opposed to the joint member U.

In addition, in the following description, among the side surfaces 921 and 922 of the joint member U, the side surface which opposes the side surface (that is, the rising side surface 911 of the main-body part 90Q) of the buttocks recessed part 900 ( 921 is called "butting side 921", and the other side 922 is called "exposure side 922". In addition, when distinguishing the tab members 91 and 92, the tab member 91 shall be called "the 1st tab member 91", and the tab member 92 shall be called the "2nd tab member 92."

The joint member U is mounted on the bottom surface (ie, the surface 916 of the stepped portion 90R) of the butting recess 900. The joint member U according to the present embodiment is made of a plate-shaped member having a planar shape (in this embodiment, a rectangle) substantially the same as the butting recess 900, and inserted into the butting recess 900. On the lower side, the butt side 921 contacts the rising side 911 of the main body 90Q (see FIGS. 71A and 71B), and the exposed side 922 is the exposed side of the main body 90Q. It becomes the surface of the same height as the exposed side surface 918 (refer FIG. 67 (a)) of 914 and the step part 90R. Although there is no restriction | limiting in particular in the magnitude | size of the thickness of the joint member U, In this embodiment, it is set equal to the depth of the butting recess 900, and when the joint member U is inserted into the butting recess 900, It becomes the surface of the same height as the surface (upper surface) 923 of the joint member U, and the surface (upper surface) 912 of the main-body part 90Q (refer FIG. 71 (b)). The material of the joint member U is not particularly limited, but is formed of a metal material having the same composition as the metal member 910 in the present embodiment.

The tab members 91 and 92 each have dimensions and shapes that can cover the joints (boundary lines) of the main body portions 90Q and 90Q appearing on the exposed side surface 922 side of the joint member U and the joint member U, respectively. Equipped. The tab members 91 and 92 according to the present embodiment are opposed not only to the exposed side surfaces 922 of the joint member U but also to the exposed side surfaces 914 and 914 of the main body portions 90Q and 90Q.

In addition, as shown in FIG. 70 (b), the tab members 91 and 92 are flush with the surface 912 of the main body 90Q and the surface 933 of the joint member U, respectively. Is installed. In addition, in this embodiment, the 1st tab member 91 is mounted in the surface (upper surface) of the tab member 930 used when joining the stepped portions 90R and 90R, and the welding of the main body portions 90Q and 90Q. To the exposed sides 914, 914. Similarly, the second tab member 92 is mounted on the surface (upper surface) of the tab member 940 used when joining the stepped portions 90R and 90R, and the exposed side surfaces 914 of the main body portions 90Q and 90Q by welding. , 914.

In addition, the member formed by arrange | positioning the joint member U in the 1st metal member 910a and the 2nd metal member 910b is also called the to-be-joined metal member 90. FIG. 66, the surface of the to-be-joined metal member 90 is surface A, the back surface B, the one side 1st side C, and the other side 2nd side ( It is called D).

(5) surface temporary bonding process

In the surface temporary joining process, friction stir is preliminarily performed from the surface A side with respect to the butt part exposed to the surface A of the to-be-joined metal member 90. FIG. As for the surface temporary joining process, as shown in FIG. 72, the butt | matching part J91 (fourth intersection point c4) of the 1st tab material 91 and the joint member U using the rotational tool F for temporary joining. To first intersection point c1], abutment portion J92 (first intersection point c1 to second intersection point c2) of the main body portion 90Q of the first metal member 910a and the joint member U, Butting part J93 (2nd intersection c2-3rd intersection c3) of the 2nd tab material 92 and the joint member U, and the main-body part 90Q and the joint member of the 2nd metal member 910b. It is a process of performing friction stirring on the butt | matching part J94 (3rd intersection c3-4th intersection c4) of (U).

The surface of the bonding process, the starting position of the friction stir (S _P) and end position (E _P) to a first taepjae by the joint rotation tool insert provided and, in the starting position (S _P) to (91) (F) Relatively moves to the end position E _P without deviating in the middle. That is, in the joint temporary joining process, one temporary joining rotary tool F is moved so as to form the movement trace (bead) of one brush drawing, and friction stirring is performed continuously with respect to the butt | matching parts J91-J94.

The order of friction stirring in the surface temporary bonding process is demonstrated in more detail.

The temporary joining rotary tool F is positioned directly above the starting position _SP installed in place of the first tab member 91, and then the temporary rotating tool F is lowered while turning the temporary joining rotary tool F to the right. Press F2) to the starting position _SP . Although the rotational speed of the temporary welding rotary tool F is set according to the dimension and shape of the stirring pin F2, the material, thickness, etc. of the metal member 10 etc. which are frictionally stirred, most are 500-2000 (rpm). It is set in the range of.

When the stirring pin F2 is in contact with the surface of the first tab member 91, the metal around the stirring pin F2 is plastically fluidized by frictional heat, and the stirring pin F2 is inserted into the first tab member 91. do. When the whole of the stirring pin F2 enters the 1st tap material 91, and the whole surface of the lower end surface F11 of the shoulder part F1 contacts the surface of the 1st tap material 91, the rotation tool for temporary joining While rotating (F), relative movement is made toward the temporary joining starting point p1 provided in the center part (middle of the 1st intersection c1 and the 4th intersection c4) of the butt | matching part J91.

Although the moving speed (feeding speed) of the temporary welding rotary tool F is set according to the dimension and shape of the stirring pin F2, the material, thickness, etc. of the metal member 910 etc. which are friction-stirred, most are 100-100 It is set in the range of 1000 (mm / min). In addition, when moving the temporary welding rotary tool F, you may incline the axis line of the shoulder part F1 to the rear side of a traveling direction with respect to a perpendicular line slightly, but if it sets it to vertical without making it incline, the temporary welding rotary tool F Direction change becomes easy, and complicated movement becomes possible.

When the rotational tool F for temporary joining is relatively moved and friction stirring is performed to the temporary joining starting point p1 continuously, butt part J91 is not removed from the temporary joining starting point p1 without detaching the temporary joining rotating tool F. Relatively moves toward the 1st intersection point c1 which is one end of (), and performs friction stirring with respect to a part of butt | matching part J91. That is, the butt | matching part J91 is made by setting the route of friction stirring on the joint (boundary line) of the 1st tab material 91 and the joint member U, and moving the rotational tool F for temporary joining along the said route. Friction stirring is performed.

In addition, when the stirring pin F2 of the temporary welding rotary tool F enters the butt | matching part J91, the force which tries to isolate | separate the 1st tap material 91 and the joint member U acts, but the 1st tap material ( Since the 91 is welded to the main body 90Q, no gap occurs between the first tab member 91 and the metal member 910.

When the temporary welding rotation tool F is moved to the 1st intersection point c1, the 1st tap material 91 and the 1st metal are intact as it is, without leaving the temporary welding rotation tool F from the 1st intersection point c1. Relative movement is performed toward the first intermediate point m1 provided in the abutting portion J95 of the main body portion 90Q of the member 910a, and friction stirring is performed on the abutting portion J95.

When the temporary joining rotary tool F is moved to the 1st intermediate point m1, it will intrude into the 1st tap material 91 as it is, without leaving the temporary joining rotary tool F from 1st intermediate point m1. It is made to move relative to the 1st intersection point c1 which is also one end of the butt | matching part J92, carrying out friction stirring with respect to the 1st tab material 91. That is, the route of friction stirring for returning the temporary welding rotary tool F to the 1st intersection point c1 from the 1st intermediate point m1 is set to the 1st tab member 91. As shown in FIG. In this case, when returning the temporary welding rotary tool F to the 1st intersection point c1 from the 1st intermediate point m1, it will become difficult to produce a joining defect in the metal member 910 or the joint member U. The high quality joined body can be obtained.

When the temporary joining rotary tool F is returned to the 1st intersection c1, it will intrude into the butt | matching part J92 as it is, without leaving the temporary joining rotary tool F from the 1st intersection c1, and abutting part Relative movement is carried out to the second intersection c2, which is the other end of the butting part J92, while friction stirring is performed with respect to J92. That is, when the temporary welding rotary tool F is returned to the 1st intersection point c1, the route of friction stirring on the main-body part 90Q of the 1st metal member 910a and the joint (boundary line) of the joint member U is carried out. Is set and friction stirring is performed with respect to the butt | matching part J92 by relatively moving the provisional joining rotary tool F along the said route.

When the temporary joining rotation tool F is moved to the 2nd intersection point c2, it will intrude into the 2nd tab material 92 as it is, without leaving the temporary joining rotation tool F from the 2nd intersection point c2, While performing friction stir with respect to the 2nd tab material 92, to the 2nd intermediate | middle point m2 provided in the abutting part J96 of the main body part 90Q of the 2nd tab material 92 and the 1st metal member 910a. Move relative. That is, the route of the friction stirring from the second intersection c2 to the second intermediate point m2 is set in the second tab member 92.

When the temporary welding rotary tool F is moved to the 2nd intermediate point m2, the one end part of the butt | matching part J93 is intact as it is, without leaving the temporary welding rotary tool F from 2nd intermediate point m2. Relatively moves toward the 2nd intersection point c2 which is also the friction part with respect to the butt | matching part J96. That is, friction stirring is performed also about the butt | matching part J96 by relatively moving the temporary welding rotary tool F along the route of the friction stirring provided on the joint (boundary line) of the 2nd tab material 92 and the main-body part 90Q. Is done.

When the temporary welding rotary tool F is moved relatively to the 2nd intersection point c2, the 3rd which is the other end of the butt | matching part J93 as it is, without leaving the temporary welding rotary tool F from the 2nd intersection point c2. The relative movement toward the intersection point c3 is performed, and friction stirring is performed on the butt portion J93. That is, when friction stirring is continuously performed to the second intersection c2, the friction provided on the joint (boundary line) of the second tab member 92 and the main body portion 90Q without terminating the friction stirring at the second intersection c2. Friction stirring is performed with respect to the butt | matching part J93 by relatively moving the rotational tool F for temporary joining along the route of stirring.

When the temporary joining rotation tool F is moved to the 3rd intersection point c3, the 2nd tab material 92 and the 2nd metal are intact as it is, without leaving the temporary joining rotation tool F from 3rd intersection point c3. Relative movement is performed toward the third intermediate point m3 provided in the abutting part J97 with the main body part 90Q of the member 910b, and friction stirring is performed on the abutting part J97. That is, when friction stirring is continuously performed to the 3rd intersection point c3 which is the other end part of the butt | matching part J93, the 2nd tap material 92 and the main-body part 90Q do not end friction stirring at the 3rd intersection point c3. Friction stirring is performed also about the butt | matching part J97 by relatively moving the rotational tool F for temporary joining along the route of the friction stirring provided on the seam (boundary line) of this.

When the temporary joining rotary tool F is moved to the 3rd intermediate point m3, it will intrude into the 2nd tap material 92 as it is, without leaving the temporary joining rotary tool F from 3rd intermediate point m3. It makes the relative movement to the 3rd intersection point c3 which is also the one end part of the butt | matching part J94, carrying out friction stirring with respect to the 2nd tab material 92. That is, the route of friction stirring for returning the temporary welding rotary tool F to the 3rd intersection point c3 from the 3rd intermediate point m3 is set to the 2nd tab member 92. As shown in FIG.

When the temporary joining rotary tool F is returned to the 3rd intersection c3, it will intrude into the butt | matching part J94 as it is, without leaving the temporary joining rotary tool F from the 3rd intersection c3, and abutting part Relative movement is carried out to the fourth intersection c4, which is the other end of the butting part J94, while friction stirring is performed with respect to J94. That is, when the temporary welding rotary tool F is returned to the 3rd intersection point c3, the route of friction stirring on the main body part 90Q of the other metal member 10 and the joint (boundary line) of the joint member U is carried out. Is set and friction stirring is performed with respect to the butt | matching part J94 by relatively moving the provisional joining rotary tool F along the said route.

When the temporary joining rotary tool F is moved to the 4th intersection c4 relatively, it will intrude into the 1st tab material 91 as it is, without leaving the temporary joining rotary tool F from the 4th intersection c4, While performing friction stir with respect to the 1st tab material 91, to the 4th intermediate point m4 provided in the butt | matching part J98 of the main-body part 90Q of the 1st tab material 91 and the 2nd metal member 910b. Move relative. That is, the route of the friction stirring from the fourth intersection c4 to the fourth intermediate point m4 is set in the first tab member 91.

When the temporary welding rotary tool F is moved to the 4th intermediate point m4, the other end part of the butt | matching part J94 is intact as it is, without leaving the temporary welding rotary tool F from 4th intermediate point m4. Relatively moves toward the 4th intersection point c4 which is also the friction part with respect to the butt | matching part J98. That is, friction stirring is performed also about the butt | matching part J98 by relatively moving the provisional joint rotation tool F along the route of the friction stirring provided on the joint (boundary line) of the 1st tab material 91 and the main-body part 90Q. Do it.

When the temporary welding rotation tool F is moved relatively from the 4th intermediate point m4 to the 4th intersection point c4, the butt part as it is, without leaving the temporary welding rotation tool F from the 4th intersection point c4. (J91) Relatively moves toward the temporary joining end point p2 provided in the middle, and performs friction stirring on the butt portion J91. That is, when friction stirring is continuously performed to the 4th intersection point c4 which is the other end part of the butt | matching part J91, the 1st tap material 91 and the main-body part 90Q do not terminate friction stirring at the 4th intersection point c4. Friction stirring is performed with respect to the butt | matching part J91 by relatively moving the rotating tool F for temporary joining along the route of friction stirring provided on the seam (boundary line) of the joint.

When the temporary splicing rotary tool F is moved to the temporary splicing end point p2 relative to the temporary splicing end point p2, the temporary splicing rotary tool F is plunged into the first tab member 91 without being detached. The relative stirring is performed to the end position E _P of the friction stirring while performing the friction stirring with respect to the first tab member 91.

When the temporary joining rotary tool F reaches the end position E _P , it raises, rotating the temporary joining rotary tool F, and removes the stirring pin F2 from the end position E _P.

In addition, in the case where the temporary joining rotary tool F is rotated to the right, there is a possibility that minute joining defects may occur on the left side in the advancing direction of the temporary joining rotary tool F. Therefore, the tab members 91 and 92 and the joint member U When friction stirring is performed along the abutting portions J91 and J93 of the) and the tab members 91 and 92 and the abutting portions J95 to J98 of the main body portion 90Q, the advancing direction of the rotational tool F for temporary bonding is performed. It is preferable to set the route of friction stir so that the tab members 91 and 92 are located on the left side. That is, when the provisional splice rotation tool F is rotated to the right, the provisional splice end point P1 is moved from the temporary splice start point p1 so that the temporary splice rotation tool F moves to the right along the outer edge of the joint member U. It is preferable to set the route of the friction stirring leading to p2). In this case, since joining defects are less likely to occur on the joint member U side, a high quality joined body can be obtained.

Incidentally, when the rotational tool F for temporary welding is rotated to the left, minute joining defects may occur on the right side of the advancing direction of the temporary welding rotary tool F, so that the tab members 91 and 92 and the joint member ( When friction stirring is performed along the abutting portions J91 and J93 of the U) and the abutting portions J95 to J98 of the tab members 91 and 92 and the main body portion 90Q, the advancing direction of the temporary welding rotary tool F is performed. It is preferable to set the route of the friction stir so that the tab members 91 and 92 are located on the right side. That is, in the case where the temporary joining rotary tool F is turned left, the temporary joining rotary tool F is moved from the temporary joining starting point p1 so that the temporary joining rotary tool F moves to the left along the outer edge of the joint member U. It is preferable to set the route of friction stirring to the junction end point p2.

In addition, in this embodiment, although the route of the surface provisional bonding process was set as mentioned above, it is not limited to this route. In addition, it is not necessary to friction stir as a technique of drawing a brush.

In addition, when the surface provisional bonding process is complete | finished, it is preferable to perform a preliminary hole formation process. Although a preliminary hole formation process is not shown in _figure , a preliminary hole is formed in the starting position S _M2 of friction stirring in a surface main joining process. The preliminary hole is provided for the purpose of reducing the insertion resistance (pressing resistance) of the stirring pin G2 of the rotary tool G for joining. Although there is no restriction | limiting in particular in the form of a spare hole, For example, a cylindrical shape is preferable.

(6) surface bone bonding process

Surface In this bonding step, friction stirring is performed in earnest from the surface A side with respect to the butt portion exposed to the surface A of the joined metal member 90. That is, the surface bonding process is a process of carrying out friction stirring with respect to the butt | matching part J92, J94 using the rotation bonding tool G for larger bonds than the rotation welding tool F for provisional joining. In this embodiment, the friction stirring performed on the butt | matching part J92 is made into the 1st surface bone bonding process, and the friction stirring performed on the butting part J94 is made into the 2nd surface bone bonding process.

In the surface-bonding process, as shown in FIG. 73, the starting position S _M2 and the end position E _M2 of friction stirring were provided in the 1st tab material 91, and were inserted in the starting position S _M2 . The rotary tool G for joining is relatively moved to the end position E _M2 without detaching it halfway. That is, in the surface bone bonding step, one bone bonding rotary tool G is moved to form a movement trajectory (bead) of one brush drawing, and the first surface bone bonding step and the second surface bone bonding step are continuously performed. Do it.

The surface-bonding process is explained in more detail. In the surface-bonding process, first, the bonding rotary tool G is positioned directly on the preliminary unshown preliminary hole formed at the start position S _M2 , and the lowering is performed while the rotary welding tool G for bonding is rotated to the right. The tip of the stirring pin G2 is inserted into a preliminary hole (not shown).

When the whole of the stirring pin G2 enters the 1st tap material 91, and the whole surface of the lower end surface G11 of the shoulder part G1 contacts the surface of the 1st tap material 91, while carrying out friction stirring, The joining rotary tool G is relatively moved toward the one end (first intersection c1) of the butt portion J92, and is further intruded into the butt portion J92 to perform the first surface bone bonding process. When the rotary tool G for joining is moved, the metal around the stirring pin G2 will plasticize in turn, and at the position away from the stirring pin G2, the metal which was plasticized and hardened again will harden | cure again and will be made. 1 Surface-side plasticization region W92 is formed.

The moving speed (feeding speed) of the rotary tool G for joining is set according to the size and shape of the stirring pin G2, the material and the thickness of the metal member 910 and the like that are frictionally stirred, but most of them are 30 to It is set in the range of 300 (mm / min).

When there exists a possibility that the heat input amount to the metal member 910 and the joint member U may become excessive, it is preferable to cool by supplying water etc. around this rotary tool G for this joining. In addition, when coolant enters the abutting part J92 or the like, there is a possibility that an oxide film is generated on the joining surface. However, in this embodiment, the surface provisional bonding process is performed to joint with the metal member 910 (main body part 90Q). Since the joint of the member U is occluded, it is difficult for cooling water to enter the abutting part J92 etc., and there is no possibility of deteriorating the quality of a junction part.

When the joining rotary tool G intrudes into the butt | matching part J92, the route of friction stirring is set on the joint part of the main-body part 90Q and the joint member U, and the joining rotary tool (see this route) ( By relatively moving G), friction stir is continuously performed from one end (first intersection c1) of the butting part J92 to the other end (second intersection c2).

When the bonding rotation tool G is relatively moved to the other end (second intersection c2) of the butt portion J92, the second bonding material 92 is directly attached to the second tab member 92 without being detached from the bonding tool. It intrudes and makes relative movement to one end part (3rd intersection point c3) of the butt | matching part J94, carrying out friction stirring with respect to the 2nd tab material 92. As shown in FIG. That is, the route of the friction stirring from the second intersection c2 to the third intersection c3 is set in the second tab member 92.

When the joining rotary tool G is relatively moved to one end (third intersection c3) of the butt portion J94, the joining rotary tool G is detached from the third intersection c3 without being separated. It intrudes into the butt | matching part J94, and makes relative movement to the 4th intersection point c4 which is the other end of the butt | matching part J94, carrying out friction stirring with respect to the butt | matching part J94. In other words, when the bonding rotary tool G is relatively moved to one end of the butting part J94, friction is formed on the joint (boundary line) of the main body 90Q of the other metal member 910 and the joint member U. The 2nd surface main bonding process is performed with respect to the butt | matching part J94 by setting the route of stirring and carrying out the relative rotation tool G for this bonding along the said route.

When the bonding rotation tool G is relatively moved to the other end portion (fourth intersection point c4) of the butt portion J94, the first bonding material 91 is left as it is without detaching the bonding tool. It rushes in and relatively moves to the end position E _M2 while performing friction stir with respect to the first tab member 91.

In addition, in the surface-bonding process, the rotation tool G for bonding was rotated right from the start position S _M2 to the end position E _M2 , and friction stir was performed by the method of drawing a brush, but this is limited to this. It doesn't happen. For example, the joining rotary tool G may be rotated leftward, and the joining rotary tool G may be viewed from any one of the first tab member 91 or the second tab member 92 instead of a single brush drawing method. Once detached, you may perform each friction stirring of the butt | matching part J92 or J94.

(7) Back side bonding process

Back surface In this joining process, friction stir is performed from the back surface B side of the to-be-joined metal member 90 to the butt | matching part J920 of step part 90R, 90R. As shown in FIG. 74, when said surface bone joining process is complete | released, the to-be-joined metal member 90 is released from the restraint of the friction stirring apparatus not shown, and the back surface B of the to-be-joined metal member 90 is shown. Reattach so that it faces upward.

The back surface bonding process rotates the bonding for this bonding along the butt | matching part J920 from the start position S _M2 set to the 1st tab material 940 to the end position E _M2 set to the 2nd tab material 930. It is a process of performing friction stirring, without leaving the tool G. Back surface The back surface side plasticized region W94 is formed in the back surface B of the to-be-joined metal member 90 by this joining process. As shown in FIG. 66, the back surface side plasticization area | region W94 overlaps the 1st step part plasticization area | region W91. Thereby, the butt | matching part J920 which the stepped part 90R of the 1st metal member 910a and the stepped part 90R of the 2nd metal member 910b butt | closed is sealed over the full length of a depth direction. Thereby, the airtightness and watertightness between the side surfaces of the to-be-joined metal member 90 can be improved.

In addition, although this back surface bonding process was performed after surface bone bonding in this embodiment, it is not limited to this, For example, you may perform after a 1st step part main bonding process. When the present bonding step is completed, all the tab members are removed from the metal member 90 to be joined.

(8) side welding process

In the side welding process, as shown to FIG. 75 and FIG. 76, welding is performed with respect to the butt part exposed to the 1st side surface C and the 2nd side surface D side of the to-be-joined metal member 90. FIG. That is, as shown in FIG. 75, when the 1st side surface C complete | finishes the back surface main joining process, the joining part J92 and the lower part of the butt | matching part J94 are also rubbing by the rotation tool G for this bonding. Since it is not stirred, it remains as an unfired area | region (unbonded area | region). Further, the butt portion J921 between the bottom surface of the joint member U and the bottom surface of the butt recessed portion 900 also remains as an unfired region. Therefore, in a side welding process, welding is carried out to these unbaked areas, and the unbaked area is sealed with a weld metal. The side welding process in this embodiment includes the 1st side welding process which welds the 1st side surface C, and the 2nd side welding process which welds the 2nd side surface D. FIG.

The first side welding step is a concave groove forming step of forming the concave groove K90 in the first side surface C, a weld metal filling step of performing padding welding on the concave groove K90, and a weld filled in the weld metal filling step. It includes a cutting process of cutting off the part which protruded from the 1st side surface C among the metal T90.

In the concave groove forming step, as illustrated in FIG. 75, the butt portion J92 of the joint member U and the first metal member 910a, and the butt portion of the joint member U and the second metal member 910b. It is a process of forming a recessed groove over J94, the butt | matching part J921 of the joint member U, and the bottom face of the butting recess 900, and the butt | matching part J920 of step | step parts 90R and 90R. The recessed groove K90 is continuously formed along each butt part using a well-known end mill. Although the shape of the recessed groove K90 is not limited, In this embodiment, it forms in semi-circle shape when seen from a cross section. In addition, the width Kb ₁ of the recessed groove K90 is formed smaller than the width W92b of the first surface-side plasticized region W92. Thus, by forming the recessed groove K90 small, the work efficiency of the formation process of the recessed groove K90 and the welding metal filling process demonstrated later can be improved.

In addition, in this embodiment, although the recessed groove K90 was formed over the full length of the butt | matching part J92, the butt | matching part J94, the butting part J920, and the butting part J921, it is limited to this. It is sufficient to form the recessed groove K90 in at least the unbaked area | region among these abutting parts. For example, a cavity defect or an oxide film may be formed in the first surface side plasticized region W92, the second surface side plasticized region W93, the first stepped portion plasticized region W91, and the rear surface side plasticized region W94. When it is exposed, it is preferable to form the recessed groove K90 so that these defects may be included. Thereby, in the weld metal filling process demonstrated later, the said cavity defect and an oxide film can be sealed by a weld metal.

In the weld metal filling step, as shown in FIG. 76, padding welding such as TIG welding or MIG welding is performed on the recessed groove K90 to fill the recessed groove K90 with the weld metal T90. The padding welding is performed to the extent that the weld metal T90 protrudes from the surface of the first side surface C to the recessed groove K90. Thus, by performing a welding metal filling process, the unfired area | region of the butt | matching part J92, the butting part J94, and the butting part J921 can be reliably sealed. In addition, a cavity defect and an oxide film are formed in the first surface side plasticized region W92, the second surface side plasticized region W93, the first stepped portion plasticized region W91, and the back side plasticized region W94. When exposed, these defects can also be sealed to improve airtightness and watertightness. In addition, as shown to FIG. 76 (b), the part which protrudes from the 1st side surface C among the welding metal T90 is called padding part T90 '.

In the ablation step, as illustrated in FIG. 76B, the padding part T90 ′ is abbreviated. The ablation step is performed using a known cutting tool or the like. By performing an ablation process, the 1st side surface C can be formed smoothly. As in the present embodiment, when the weld metal T90 is formed above the surface A or below the rear surface B by the weld metal filling step, the surface A of the weld metal T90 is formed. Or it is preferable to cut the part which protruded more than back surface B. FIG.

The second side welding step includes a concave groove forming step of forming the concave groove K90 in the second side surface D, a weld metal filling step of padding welding the concave groove K90, and a weld metal formed in the weld metal filling step. It includes a cutting process of cutting off the part which protruded from 2nd side surface D in (T90).

Since the 2nd side welding process is substantially the same as the 1st side welding process except having performed a process with respect to 2nd side surface D, detailed description is abbreviate | omitted.

According to the joining method which concerns on 1st Embodiment demonstrated above, welding to the butt | matching part J92, the butt | matching part J94, the butt | matching part J920, and the butt | matching part J921 exposed by the side surface of the to-be-joined metal member 90 is carried out. The welding metal T90, the first surface side plasticized region W92, the second surface side plasticized region W93, and the back side plasticized region W94 are overlapped. Thereby, the unfired area | region exposed to the side surface of the to-be-joined metal member 90 can be sealed reliably, and the airtightness and water tightness between the side surfaces of the to-be-joined metal member 90 can be improved. In addition, conventionally, there has been a problem that the work becomes complicated when the thickness of the metal member 90 to be joined becomes large. However, according to the side welding process according to the present embodiment, the thickness of the metal member 90 to be joined is easily determined. The unfired region can be sealed.

In addition, by overlapping the first stepped portion plasticized region W91 and the back surface side plasticized region W94, the butt portion J920 of the stepped portions 90R and 90R can be reliably sealed.

In addition, this invention is not limited to the above-mentioned aspect, A change is possible suitably in the range which does not deviate from the meaning of this invention. For example, as shown in FIG. 75, the abutment part (by making the depth of the 1st surface side plasticization area | region W92 and the 2nd surface side plasticization area | region W93 larger than the thickness of the joint member U) You may perform friction stirring over the full length of the depth direction of J92 and the butt | matching part J94. In addition, when the unbaked region is formed between the first stepped portion plasticized region W91 and the back surface-side plasticized region W94, the side-baking process may be performed to seal the unbaked region.

[Eleventh Embodiment]

Next, the joining method concerning 11th Embodiment of this invention is demonstrated.

The joining method according to the eleventh embodiment of the present invention differs from the tenth embodiment in that the joint member is inserted into the hollow portion formed to face the first metal member and the second metal member provided with the concave portion.

77 is an overall perspective view illustrating a bonding method according to an eleventh embodiment. 77, the joining method which concerns on 11th Embodiment has the 1st metal member 950a, the 2nd metal member 950b, the 1st metal member 950a, and the 2nd metal member 950b. ) And friction stir with respect to the abutment portions of the surface A and the back surface B of the to-be-joined metal member 90N having the joint member 970 interposed between the first side C and the second side. The welding is performed on the butt portion exposed to the side surface D.

First, the to-be-joined metal member 90N of the joining method which concerns on this embodiment is demonstrated in detail.

As shown in FIGS. 78A and 78B, the to-be-joined metal member 90N includes a pair of first metal members 950a having recesses 990a and 990b formed at their ends in the present embodiment. And a joint member 970 inserted into the hollow portion formed by abutting the second metal member 950b and the first metal member 950a and the second metal member 950b.

The first metal member 950a is a metal member that is rectangular in cross section. The end face 961a of the first metal member 950a is formed with a concave section 990a of a cross-sectional trapezoid continuous from one side surface 964a toward the other side surface 965a. The recessed part 990a is formed in the substantially center of the height direction of the 1st metal member 950a.

The second metal member 950b is a metal member having a shape that is substantially the same as the first metal member 950a. The recessed part 990b formed in the 2nd metal member 950b is arrange | positioned facing the recessed part 990a of the 1st metal member 950a, and is the 1st metal member 950a and the 2nd metal member 950b. ), The hollow part 991 (refer FIG. 78 (b)) is formed.

In the present embodiment, the first metal member 950a and the second metal member 950b are made of a metal material having the same composition. For example, aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, It consists of a friction-stirrable metal material such as magnesium alloy.

The joint member 970 is made of a material equivalent to the first metal member 950a in this embodiment, and is a member inserted into the hollow portion 991 formed by the pair of recesses 990a and 990b. In the present embodiment, the joint member 970 is a member that exhibits a hexagonal shape in cross section, and both end surfaces in the longitudinal direction of the joint member 970 are formed of the first metal member 950a and the second metal member 950b. It is formed so that it may become the surface of the same height as both sides. In the joint member 970, the trapezoidal cross-sectional shape of the side which contacts the 1st metal member 950a is formed with long side p1 and short side p2. The distance from the long side to the short side is formed by p3. On the other hand, the cross-sectional shape of the recessed part 990a of the 1st metal member 950a is formed by long side q1 and short side q2. The distance from the long side to the short side is formed by q3. The relationship between the trapezoidal cross-sectional shape of the side which contacts the 1st metal member 950a, and the recessed part 990a of the 1st metal member 950a among the joint members 970 is p1 q1, p2 q2, p3. It is formed by q3. That is, the joint member 970 is inserted so that there is almost no gap in the hollow part 991 formed by the pair of recessed parts 990a and 990b, as shown to FIG. 78 (b).

In addition, in the present embodiment, the joint member 970 is formed in a hexagonal shape in cross section, but the joint member 970 is not limited thereto. The joint member 970 may be rectangular in cross section, circular in cross section, or the like. In addition, in accordance with the shape of the joint member 970, the shapes of the recesses 990a and 990b of the first metal member 950a and the second metal member 950b may be appropriately changed.

Here, as shown in FIG. 77, the surface of the to-be-joined metal member 90N is surface A, the back surface B, the one side 1st side C, and the other side 2nd. It is called side (D). In addition, as shown to (a) and (b) of FIG. 78, the part in which the end surface 961a of the 1st metal member 950a and the end surface 961b of the 2nd metal member 950b butted | matched was carried out. This is called the butting part J951. In addition, the part in which the joint member 970, the 1st metal member 950a, and the 2nd metal member 950b butted together is called the butt | matching part J971.

The first tab member 952 and the second tab member 953 are arranged to sandwich the abutting portion J951 of the metal member 90N to be joined as shown in FIGS. 79A and 79B. Respectively attached to the joined metal member 90N to cover the seams (boundary lines) of the first metal member 950a and the second metal member 950b that appear on the first side surface C and the second side surface D, respectively. Cover up. Although there is no restriction | limiting in particular in the material of the 1st tab material 952 and the 2nd tab material 953, In this embodiment, it is formed with the metal material of the same composition as the to-be-joined metal member 90N. The shape and size of the first tab member 952 and the second tab member 953 are not particularly limited, but in the present embodiment, the thickness of the joined metal member 90N in the butt portion J951 is measured. It is made the same as a dimension.

Hereinafter, the bonding method which concerns on 2nd Embodiment is demonstrated in detail. The joining method which concerns on this embodiment is (1) joint member insertion process, (2) surface temporary bonding process, (3) surface bone bonding process, (4) back temporary bonding process, (5) back surface bonding process, ( 6) side welding process.

(1) Joint member insertion process

In the joint member insertion step, as shown in FIG. 78, the end face 961a of the first metal member 950a and the end face 961b of the second metal member 950b are brought into close contact with each other, and the recessed portion 990a The joint member 970 is inserted into the hollow portion 991 formed at 990b.

In a joint member insertion process, the surface 962a of the 1st metal member 950a and the surface 962b of the 2nd metal member 950b are made into the surface of the same height, and the back surface of the 1st metal member 950a ( The back surface 963b of 963a and the 2nd metal member 950b is made into the surface of the same height. Similarly, the side surface 964a of the first metal member 950a and the side surface 964b of the second metal member 950b are the same height, and the side surface 965a of the first metal member 950a and the side surface 965a of the first metal member 950a. The side surface 965b of the second metal member 950b is a surface having the same height. In addition, the both end surfaces of the joint member 970 are formed in the surface of the same height as the both side surfaces of the 1st metal member 950a and the 2nd metal member 950b.

(2) surface temporary bonding process

The surface temporary joining step includes a tab member arranging step of arranging the tab member on the to-be-joined metal member 90N, abutting part J952, abutting part J951, and the exposed part A of the surface A of the to-be-joined metal member 90N, and The surface temporary joining process of temporarily joining the abutting part J953 from the surface side is included.

In the tab member arrangement step, as illustrated in FIGS. 79A and 79B, the first tab member 952 is disposed on the second side surface D side of the butt portion J951, and the contact surface thereof is disposed as the second surface. To the side (D). Moreover, the 2nd tab material 953 is arrange | positioned at the 1st side surface C of the butt | matching part J951, and the contact surface is made to contact the 1st side surface C. As shown in FIG. At this time, the surface of the first tab member 952 and the surface of the second tab member 953 are the surfaces of the same height as the surface A of the metal member 90N to be joined, and at the same time as the rear surface of the first tab member 952. The rear surface of the second tab member 953 is a surface having the same height as the rear surface B of the metal member 90N to be joined. An abutting part J952 is formed on the abutment surface of the first tab member 952 and the joined metal member 90N, and an abutment portion J953 is provided on the abutment surface of the second tab member 953 and the joined metal member 90N. Is formed.

In addition, in the tab member arrangement step, as shown in FIG. 79 (b), the metal corner member 952a and 952b formed by the joined metal member 90N and the first tab member 952 are welded to each other. 90N and the 1st tab material 952 are temporarily joined. Further, the corner portions 953a and 953b formed by the joined metal member 90N and the second tab member 953 are welded to temporarily join the joined metal member 90N and the second tab member 953. In addition, welding may be performed continuously over the full length of the recessed corner parts 952a, 952b, and 953a, 953b, and may be interrupted and welded.

In the surface temporary bonding process, as shown in FIG. 80, one temporary welding rotating tool F is moved so that the movement trace (bead) of a brush stroke may be formed, and it joins to the abutting parts J952, J951, and J953. Friction stirring is performed continuously from the surface A side. That is, to move to escape without causing the stir pin (F2) of the joining rotation tool (F) for the insertion at the start of friction stir (S _P) during the end position (E _P).

In addition, although the surface provisional bonding process became the trajectory as shown in FIG. 80, it is not limited to this, Another trajectory may be sufficient. Moreover, it does not necessarily need to carry out continuously. By performing a surface temporary joining process, spreading of the tab material and the to-be-joined metal member 90N in the surface main joining process performed later can be prevented.

When the surface provisional bonding process is complete | finished, it is preferable to perform a preliminary hole formation process. In the preliminary hole forming step, as illustrated in FIG. _81A , the preliminary hole P1 is formed at the start position S _M11 of friction stirring in the surface main bonding step. The preliminary hole P1 is provided in order to reduce the insertion resistance (pressing resistance) of the stirring pin G2 of this bonding rotary tool G, and in this embodiment, stirring of the temporary welding rotary tool F is carried out. The hollow hole formed when the pin F2 is separated is formed by expanding the diameter with a drill or the like not shown.

(3) surface bonding process

Surface-bonding process is a process of fully joining the butt | matching part J951 in the surface A side of the to-be-joined metal member 90N. In the surface bone joining process which concerns on this embodiment, friction stirring is carried out from the surface A side of the to-be-joined metal member 90N with respect to the butt | matching part J951 of the temporarily bonded state using the rotation tool G for bone bonding. Is done.

In the surface-bonding process, as shown to (a)-(c) of FIG. 81, the stirring pin G2 of the rotation tool G for this bonding in the preliminary hole P1 formed in the starting position S _M11 . ) Is inserted (press-in), and the inserted stirring pin G2 is moved to the end position E _M11 without detaching it halfway. That is, in the surface main joining process, friction stirring is started from the preliminary hole P1, and friction stirring is performed continuously to the end position E _M11 .

The surface-bonding process is explained in more detail with reference to FIG. 81 (a)-(c).

First, as shown in FIG. 81 (a), the joining rotary tool G is placed directly on the preliminary hole P1 (starting position S _M11 ), and then the joining rotary tool ( G) is lowered while turning right, and the tip of stirring pin G2 is inserted into preliminary hole P1. When the stirring pin G2 enters the preliminary hole P1, the circumferential surface (side surface) of the stirring pin G2 contacts the hole wall of the preliminary hole P1, and metal plasticizes and fluidizes from the hole wall.

When the whole stirring pin G2 enters the 2nd tab material 953, as shown in FIG.81 (b), the one end part of the butt | matching part J951 of the to-be-joined metal member 90N is made, performing friction stirring. The joining rotary tool G is made to move relative to each other, and the mating portion J953 is crossed so as to intrude into the abutting portion J951. When the joining rotary tool G is moved, the metal around the stirring pin G2 is plasticized in turn, and at the position away from the stirring pin G2, the metal that has been plasticized is cured again and the surface is hardened. Side plasticization region W911 is formed.

The depth Wc of the surface side plasticized region W911 is formed to be larger than the distance 970a from the surface A of the metal member 90N to be joined to the upper end of the joint member 970 in this embodiment. It is desirable to. In other words, by bringing the surface side plasticized region W911 into contact with the joint member 970, friction agitation can be performed over the entire length of the butt portion J951 in the depth direction, whereby the quality of the product can be further improved.

When there exists a possibility that the heat input amount to the to-be-joined metal member 90N may become excessive, it is preferable to cool by supplying water from the surface A side to the circumference | surroundings of this bonding rotary tool G, and the like. Moreover, when coolant enters between the 1st metal member 950a and the 2nd metal member 950b, there exists a possibility that an oxide film may generate | occur | produce on a joining surface (end surface 961a, 961b, FIG. 78). In this case, since the joint is closed by performing the temporary joining step, the cooling water is hard to enter between the joined metal members 90N, and there is no fear of deteriorating the quality of the joint.

In the abutting part J951 of the to-be-joined metal member 90N, a route of friction stir is set on the joint phase (moving locus phase in the temporary joining process) of the to-be-joined metal member 90N, and viewed along the route. By relatively moving the rotary tool G for joining, friction stirring is performed continuously from the one end part of the butt | matching part J951 to the other end part. When this bonding rotary tool G is relatively moved to the other end of the butt | matching part J951, it crosses the butt part J952, performing friction stirring, and makes it relatively move toward the end position E _{M11 as} it is. When the joining rotary tool G reaches the end position E _M11 , as shown in FIG. 81C, the joining rotary tool G is raised while rotating the joining rotary tool G to raise the stirring pin G2. It is separated from the end position E _M11 .

(4) back temporary bonding process

In the back temporary joining process, as shown in FIG. 82, the contact part J953 of the to-be-joined metal member 90N and the 2nd tab material 953 on the back surface B side of the to-be-joined metal member 90N. The abutment part J951 of the to-be-joined metal member 90N, the to-be-joined metal member 90N, and the abutment part J952 of the 1st tab material 952 are temporarily joined.

In the back temporary joining step, as shown in FIG. 82 (b), one temporary joining rotary tool F is moved to form a movement trajectory (bead) of one brush drawing, and the abutment portions J953 and J951 , J952) in succession is subjected to friction stir. That is, to move to escape without causing the stir pin (F2) of the joining rotation tool (F) for the insertion at the start of friction stir (S _P) during the end position (E _P). The end position E _P becomes the start position S _M12 of the present bonding step, which is performed later.

In addition, you may form a preliminary hole in advance in the insertion planned position of this bonding rotary tool G, before performing this back surface bonding process demonstrated later. That is, as shown to FIG. 83 (a), you may form the preliminary hole P2 in the starting position S _M12 of the back surface main bonding process demonstrated later.

(5) Back side bonding process

Back surface This joining process is a process of fully joining the butt | matching part J951 exposed to the back surface B of the to-be-joined metal member 90N. Back surface concerning this embodiment In this joining process, friction stirring is carried out from the back surface B of the to-be-joined metal member 90N with respect to the butt | matching part J951 of the temporary welding state using the rotation tool G for this joining. Is done.

As shown in (a) and (b) of FIG. 83, the back bonding process includes stirring pins G2 of the rotary tool G for joining at the starting position S _M12 set in the first tab member 952. ) Is inserted (press-in), and the inserted stirring pin G2 is moved to the end position E _M12 without detaching it halfway. In this back joining process, friction stirring is started from the preliminary hole P2, and friction stirring is performed continuously to the end position E _M12 . When the joining rotary tool G is moved, the metal around the stirring pin G2 plasticizes in turn, and at the position away from the stirring pin G2, the metal which was plasticized and hardened again hardens | cures and is back Side plasticization region W912 is formed.

In this embodiment, the depth Wc of the back surface side plasticized region W912 is larger than the distance 970a from the back surface B of the metal member 90N to be joined to the upper end of the joint member 970. It is preferable to form. That is, by bringing the back side plasticized region W912 into contact with the joint member 970, friction agitation can be performed over the entire length of the butt joint J951 in the depth direction, so that the butt joint J951 can be reliably sealed. Can be. As a result, the quality of the product can be further improved.

When this back joining process is complete | finished, as shown in FIG. 84, a tab material is cut out from the to-be-joined metal member 90N. Back surface The surface side plasticized area | region W911 and the back surface side plasticized area | region W912 are formed in the surface A and the back surface B of the to-be-joined metal member 90N after this joining process. The highest depth portions of the surface side plasticized region W911 and the back side plasticized region W912 are in contact with both ends of the joint member 970, respectively. Although the abutting part J971 of the joint member 970, the 1st metal member 950a, and the 2nd metal member 950b is friction-stirred, the other part becomes an unfired area | region.

(6) side welding process

A side welding process is a process of welding along the butt | matching part J971 exposed to the 1st side surface C and the 2nd side surface D of the to-be-joined metal member 90N. That is, the concave portion 990a (see FIG. 78) of the joint member 970 and the first metal member 950a and the butt portion of the concave portion 990b of the joint member 970 and the second metal member 950b ( J971) is sealed with weld metal. In this embodiment, the side welding process includes the 1st side welding process of welding to the 1st side surface C, and the 2nd side welding process of welding to the 2nd side surface D. As shown in FIG.

The first side welding step includes a concave groove forming step of forming a concave groove K91 in the first side surface C of the to-be-joined metal member 90N, a weld metal filling step of performing padding welding on the concave groove K91, It includes a cutting process of cutting off the part which protruded from the 1st side surface C among the welding metal T91 formed in the welding metal filling process.

In the concave groove forming step, as shown in FIG. 85, in the first side surface C, the concave groove K91 is formed at a predetermined depth along the butt portion J951 and the butt portion J971. In the present embodiment, the concave groove K91 communicates with the surface A from the first concave groove portion K91 ₁ formed along the shape of the joint member 970 and the first concave groove portion K91 ₁ . It has a recessed groove part K91 ₂ and the 3rd recessed groove part K91 ₃ which communicates with the back surface B from the 1st recessed groove part K91 ₁ .

The first concave groove portion K91 ₁ is formed by cutting a part of the end surface of the joint member 970, the first metal member 950a and the second metal member 950b with a known end mill or the like. The first concave groove portion K91 ₁ is formed to be cut larger than the outer periphery of the end face of the joint member 970 so that the butt portion J971 is exposed on the bottom surface of the first concave groove portion K91 ₁ . In the first embodiment, the first concave groove portion K91 ₁ cuts all the end faces of the joint member 970, but it is sufficient that at least the concave groove is formed along the butt portion J971.

The second concave groove K91 ₂ and the third concave groove K91 ₃ are continuously formed from the first concave groove K91 ₁ toward the surface A and the rear surface B along the butt portion J951. have. The width Kb ₂ of the second concave groove K91 ₂ and the third concave groove K91 ₃ is formed to be smaller than the width Wa of the front side plasticized region W911 and the back side plasticized region W912. It is. In addition, the surface side small flame region (W911) and the rear side small cavity defects in a tunnel shape on a torch region (W912) or, in the case where the take-up oxidation film, the second concave groove (K91 ₂₎ and the third concave groove (K91 _When forming ₃ ), it is preferable to cut these defective parts. Thereby, the said defective part can be sealed in the welding metal filling process demonstrated later.

In the weld metal filling process, as shown in FIG. 86, padding welding, such as TIG welding or MIG welding, is performed to the recessed groove K91, and the recessed groove K91 is filled with the weld metal T91. Padding welding is performed so that the welding metal T91 may protrude in the recessed groove K91 from the surface of the 1st side surface C. As shown in FIG. Thus, by performing a welding metal filling process, the unfired area | region of the butt | matching part J971 can be sealed reliably. In addition, when a cavity defect and an oxide film are exposed in the surface side plasticization area | region W911 and the back surface plasticization area | region W912, these defects can also be sealed and airtightness and water tightness can be improved. In addition, as shown in FIG. 86 (b), the part which protrudes from the 1st side surface C among the welding metal T91 is called padding part T91 '.

In the ablation step, as illustrated in FIG. 86B, the padding part T91 ′ is abbreviated. An ablation process is performed using a well-known cutting tool. By performing an ablation process, the 1st side surface C can be formed smoothly. In addition, as in the present embodiment, when the weld metal T91 is formed above or below the surface A or the rear surface B by the weld metal filling step, the weld metal T91 is formed from the respective surfaces of the weld metal T91. It is desirable to excise the protruding part.

The second side welding step includes a concave groove forming step of forming the concave groove K91 in the second side surface D, a weld metal filling step of padding welding the concave groove K91, and a weld metal formed in the weld metal filling step. It includes a cutting process of cutting off the part which protruded from 2nd side surface D in (T91).

The second side welding step is almost the same as the first side welding step except that the second side welding step is performed on the second side face D, and thus detailed description thereof is omitted.

According to the joining method which concerns on 2nd Embodiment demonstrated above, welding is performed to the butt | matching part J951 and the butt | matching part J971 exposed to the side surface of the to-be-joined metal member 90N, and the welding metal T91 and the surface side small size | part By overlapping the burn-up region W911 and the back-side plasticized region W912, the unbaked region can be reliably sealed. Thereby, the airtightness and watertightness between the side surfaces of the to-be-joined metal member 90N can be improved.

As mentioned above, although embodiment of this invention was described, this invention can be suitably changed in the range which is not contrary to the meaning of this invention.

For example, FIG. 87 is a perspective view which shows the modification of 11th Embodiment. In 10th Embodiment and 11th Embodiment, although the recessed groove was provided in the 1st side surface C and the 2nd side surface D, the side welding process was performed, but it is not limited to this. For example, as shown in FIG. 87, a welding metal T92 is performed by directly welding the butt part J971 exposed to the 1st side surface C and the 2nd side surface D, without providing a recessed groove. The unbaked region may be sealed by By overlapping the weld metal T92, the surface side plasticized region W911 and the back side plasticized region W912, the unbaked region exposed to the side surface of the metal member 90N to be joined can be reliably sealed. In addition, in the said modification, when welding metal T912 protrudes from the surface of the 1st side surface C and the 2nd side surface D after welding, these protrusion parts are cut off and a 1st side surface is cut out. It is preferable to make (C) and 2nd side surface D smooth.

In addition, in 10th Embodiment and 11th Embodiment, although the side welding process was performed to both the 1st side surface C and the 2nd side surface D, you may carry out only in either one.

1: metal member to be joined
1a: first metal member
1b: second metal member
2: 1st tap material
3: 2nd tap material
A: surface
B: If
C: first side
D: second side
F: Rotation tool for temporary welding
G: Rotation tool for bone joining
h: metal member for filling
J: Butt
K: concave groove
K21: Concave Groove
K23: Groove
P1: spare hole
Q: hollow hole
R ₁ , R ₂ : tunnel shape cavity defect
S ₁ to S ₄ : oxide film
T: welded metal
U: Joint member
W: plasticization zone

Claims (40)

It is a joining method which performs friction stirring by moving a rotating tool with respect to the to-be-joined metal member formed by which the 1st metal member and the 2nd metal member were opposed,
A first main joining step of performing friction stir from the surface of the metal member to be joined with respect to the butt portion of the first metal member and the second metal member;
A second main joining step of performing friction stir from the rear surface of the joined metal member with respect to the butt portion;
And a side welding step of welding from the side surface of the metal member to be joined to the butt portion,
In the said side welding process, the unfired area | region between the surface side plasticization area | region formed in the said 1st main joining process and the back surface side plasticization area | region formed in the said 2nd main bonding process is covered with a welding metal, It is characterized by the above-mentioned. Way. The concave groove forming step according to claim 1, further comprising a concave groove forming step of forming a concave groove along the abutment portion of the side surface of the metal member to be joined before the lateral welding step.
The welding method is characterized in that the concave groove is filled with the weld metal in the side welding step. The joining method according to claim 2, wherein the width of the concave groove is smaller than the width of the front side plasticized region and the back side plasticized region. The joining method according to claim 1, wherein after the side welding step, a portion of the weld metal that protrudes from a side surface of the joined metal member is cut out. The joining method according to claim 1, wherein a preliminary hole is formed in advance at an insertion scheduled position of the rotary tool. It is a manufacturing method of the joining structure formed by making the end surface of a 1st metal member and the 2nd metal member abut,
A first main joining step of performing friction stir from the surface of the joining structure with respect to the butt portion of the first metal member and the second metal member;
2nd main joining process which performs friction stirring from the back surface of the said joining structure with respect to the butt | matching part of a said 1st metal member and a said 2nd metal member,
A concave groove forming step of forming a concave groove from a surface of the joining structure from a surface of the joining structure along a butt portion of the first metal member and the second metal member, on a side surface of the joining structure;
A joint member insertion step of inserting a joint member into the concave groove,
A third main joining step of performing friction stir from the surface of the joining structure to the butt portion of the joining structure and the joint member;
A fourth main joining step of performing friction stir from the rear surface of the joining structure to the butt portion of the joining structure and the joint member;
The side surface of the said joining structure in the butt | matching part of the said joining structure and the said joint member with respect to the unbaked area formed between the plasticized area formed in the said 3rd main joining process, and the plasticized area formed in the said 4th main joining process. And a side welding step of welding from the side. 7. The plasticized region formed in the first main bonding step and the second main bonding step formed in the butt portion of the first metal member and the second metal member after the concave groove forming step. A method for producing a bonded structure, wherein welding is performed from the concave groove to the unfired regions formed between the plasticized regions. 7. The plasticized region formed in the first main bonding step and the second main bonding step formed in the butt portion of the first metal member and the second metal member after the concave groove forming step. A groove part is formed in the said recessed groove along the unbaked area | region formed between plasticization area | regions, and this groove part is filled with a weld metal, The manufacturing method of the joined structure characterized by the above-mentioned. The said side welding process WHEREIN: In the side of the said joining structure and the said joint member, in the said side welding process, between the plasticization area | region formed in the said 3rd main joining process, and the plasticization area | region formed in the 4th main bonding process. A groove part is formed in the side surface of the said joining structure along the unbaked area | region formed, and this groove part is filled with a weld metal, The manufacturing method of the joined structure. The method of manufacturing a joined structure according to claim 8, wherein a portion protruding from the side surface of the concave groove among the weld metal filled in the groove portion formed in the concave groove is cut off. The method of manufacturing a joined structure according to claim 9, wherein a portion of the weld metal filled in the groove formed on the side of the joined structure protrudes from the side of the joined structure. It is a joining method of carrying out a friction stirring by moving a rotating tool with respect to the to-be-joined metal member formed by opposing the end surfaces of a 1st metal member and a 2nd metal member,
A side welding step of welding from a side surface of the metal member to be joined to an abutting portion of the first metal member and the second metal member;
A first main joining step of performing friction stir from the surface of the metal member to be joined to the butt portion after the side welding step;
And a second bone bonding step of performing friction stir from the back surface of the metal member to be joined to the butt portion after the first bone bonding step.
The welding method formed by contacting the weld metal formed in the said side welding process, and the plasticization area | region formed in the said 1st main joining process and the said 2nd main joining process, The joining method characterized by the above-mentioned. The said side welding process WHEREIN: The joining method of Claim 12 which fills the said weld metal in the recessed groove formed along the said butt part in the side surface of the said to-be-joined metal member. The joining method according to claim 13, wherein the width of the concave groove is smaller than the width of the plasticized region formed in the first bone bonding step and the second bone bonding step. The said concave groove is provided with the expansion concave groove extended continuously to the center direction of a to-be-joined metal member, The joining method of Claim 13 characterized by the above-mentioned. It is a joining method of carrying out friction stirring by moving a rotating tool with respect to the to-be-joined metal member formed by making the side surface of a 1st metal member and the end surface of a 2nd metal member adjoined,
A side welding step of welding from a side surface of the metal member to be joined to an abutting portion of the first metal member and the second metal member;
A first main joining step of performing friction stir from the surface of the metal member to be joined to the butt portion after the side welding step;
And a second bone bonding step of performing friction stir from the back surface of the metal member to be joined to the butt portion after the first bone bonding step.
The welding method formed by contacting the weld metal formed in the said side welding process, and the plasticization area | region formed in the said 1st main joining process and the said 2nd main joining process, The joining method characterized by the above-mentioned. The said side welding process is a joining method of Claim 16 which fills the said weld metal in the recessed groove formed along the said butt part in the side surface of the end surface of the said 2nd metal member. The joining method according to claim 17, wherein the width of the concave groove is smaller than half of the width of the plasticized region formed in the first bone bonding step and the second bone bonding step. The said concave groove is provided with the expansion concave groove extended continuously in the center direction of the said 2nd metal member, The joining method of Claim 17 characterized by the above-mentioned. The temporary joining process of Claim 12 or 16 including the temporary joining process which performs a temporary joining with respect to the said butt part, before performing at least one of the said 1st main joining process and the said 2nd main joining process. Characterized in that the bonding method. The joining method according to claim 12 or 16, wherein after the side welding step, a portion protruding from the side surface of the welded metal member among the weld metals is cut off. The joining method according to claim 12 or 16, wherein a preliminary hole is formed in advance at an insertion scheduled position of the rotary tool. It is a manufacturing method of the joining structure formed by making the end surface of a 1st metal member and the 2nd metal member abut,
A side welding step of welding from the side surface of the joining structure to the butt portion of the first metal member and the second metal member;
1st main joining process which performs friction stirring with respect to the butt | matching part of a said 1st metal member and a said 2nd metal member using the rotating tool from the surface of the said joining structure,
And a second main joining step of performing friction stirring with respect to the butt portion of the first metal member and the second metal member using a rotating tool from the rear surface of the joining structure,
The filling metal member is filled into a vacant hole formed when the rotating tool is released in the first main bonding step and the second main joining step, and the rotary tool is joined to the butt portion of the joining structure and the filling metal member. The repair process which performs friction stirring using the above is performed, The manufacturing method of the joined structure characterized by the above-mentioned. The said side welding process WHEREIN: The said side welding process WHEREIN: By welding from the side surface of the said joining structure with respect to the recessed groove formed in the side surface of at least one end surface of the said 1st metal member and the said 2nd metal member, A method of manufacturing a bonded structure, characterized in that the weld metal is filled into the concave grooves. The joining structure according to claim 23, wherein a temporary joining step of temporarily joining the butt parts of the first metal member and the second metal member is performed before the first main joining step and the second main joining step. Method of preparation. The method for manufacturing a bonded structure according to claim 23, wherein in the first bone bonding step and the second bone bonding step, a preliminary hole is formed in advance at an insertion scheduled position of the rotary tool. The method for manufacturing a bonded structure according to claim 23, wherein a weld metal is filled in an empty hole formed when the rotary tool is detached in the repair process. The manufacturing method of the bonded structure of Claim 23 which overlaps the plasticization area | region formed in the said 1st main bonding process, and a part of the plasticization area | region formed in the said 2nd main bonding process. Joining method which carries out a friction stir welding by moving a rotating tool to the to-be-joined metal member formed by inserting a joint member in the hollow part which formed the 1st metal member and the 2nd metal member which have a recessed part in the end surface, and the said end surface. ,
From the surface of the metal member to be joined with respect to the butt portion of the first metal member and the second metal member, butt portion of the joint member and the first metal member, and butt portion of the joint member and the second metal member. A first main joining step of performing friction stir, and
From the back surface of the to-be-joined metal member with respect to the abutment part of the said 1st metal member and said 2nd metal member, the abutment part of the said joint member and said 1st metal member, and the abutment part of the said joint member and said 2nd metal member. 2nd main joining process which performs friction stirring,
And a side welding step of welding from at least one side surface of the joined metal member to the butt portion of the first metal member and the second metal member. A rotating tool is attached to a to-be-joined metal member formed by inserting a joint member into a first metal member having a concave portion at an end face and a hollow portion formed by abutting the second metal member having a concave portion at a side face to the end face and the side face. It is a joining method which moves and performs friction stir welding,
From the surface of the metal member to be joined with respect to the butt portion of the first metal member and the second metal member, butt portion of the joint member and the first metal member, and butt portion of the joint member and the second metal member. A first main joining step of performing friction stir, and
From the back surface of the to-be-joined metal member with respect to the abutment part of the said 1st metal member and said 2nd metal member, the abutment part of the said joint member and said 1st metal member, and the abutment part of the said joint member and said 2nd metal member. 2nd main joining process which performs friction stirring,
And a side welding step of welding from at least one side surface of the joined metal member to the butt portion of the first metal member and the second metal member. The said side welding process WHEREIN: Welding over the whole unfired area | region between the plasticization area | region formed in the said 1st main joining process, and the plasticization area | region formed in the said 2nd main bonding process. Joining method characterized by the above-mentioned. The said side welding process WHEREIN: The recessed groove is formed along the butt | interval part which appears in the said side surface of the said to-be-joined metal member, and the said recessed groove is filled with a weld metal, The said side welding process characterized by the above-mentioned. Bonding method. The tab member arrangement step according to claim 29 or 30, wherein a first tab member and a second tab member are provided on both sides of the joined metal member before the first main bonding step or the second main bonding step, Abutting portion of the joining metal member and the first tab member, abutting portion of the first metal member and the second metal member, abutting portion of the joint member and the first metal member, of the joint member and the second metal member And a temporary joining step of performing friction stir with respect to the butt portion, and the butt portion of the joined metal member and the second tab member. A step of joining the stepped portions of the pair of metal members including the stepped portion having a smaller thickness than the main body portion to form a butting recess between the main body portions;
A joint member arranging step of arranging a joint member in the butting recess;
A surface-bonding step of performing friction stir from the surface with respect to the body part of one of the metal members and the butt part of the joint member, and the body part and the butt part of the joint member of the other metal member;
The back surface main joining process which performs friction stirring from the back surface with respect to the butt | matching part of the said step part,
And a side welding step of welding from a side surface to the butt portion of the pair of metal member and the joint member,
The said side welding process WHEREIN: The joining method characterized by covering the unbaked area | region between the surface side plasticization area | region formed in the said surface main joining process, and the back surface side plasticization area | region formed in the said back surface main bonding process with a welding metal. A joint member insertion step of abutting a pair of metal members having recesses in the end faces to the end faces and inserting the joint members into the hollow portions formed by the recesses;
A surface-bonding step of performing friction stir from the surface with respect to the butt portion of the pair of metal members,
A back surface main joining step of performing friction stir from the back surface with respect to the butt portion of the pair of metal members;
And a side welding step of welding from a side surface to the butt portion of the pair of metal member and the joint member,
The said side welding process WHEREIN: The joining method characterized by covering the unbaked area | region between the surface side plasticization area | region formed in the said surface main joining process, and the back surface side plasticization area | region formed in the said back surface main bonding process with a welding metal. The said surface side plasticization area | region and the said back surface side plasticization area | region contact with the said joint member, The joining method of Claim 35 characterized by the above-mentioned. 36. The concave groove forming process according to claim 34 or 35, further comprising a concave groove forming step of forming a concave groove along an abutment portion of the pair of the metal member and the joint member before the side welding step,
The welding method is characterized in that the concave groove is filled with the weld metal in the side welding step. The width | variety of the said recessed groove formed in the said surface side plasticization area | region and the said back surface side plasticization area | region is smaller than the width | variety of the said surface side plasticization area | region and the said back surface side plasticization area | region. The joining method characterized by the above-mentioned. The joining method according to claim 34 or 35, wherein after the side welding step, a portion of the weld metal that protrudes from the side surface of the metal member is cut off. The joining method according to claim 34 or 35, wherein a preliminary hole is formed in advance at an insertion scheduled position of the rotary tool used in the friction stir.

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