JP2021112752A - Joining method - Google Patents

Abstract

To provide a joining method capable of appropriately joining columns and components of different materials.SOLUTION: A joining method includes: a preparation process for forming a column step part 17; a placement process for placing a component (sealing body) 3 on a column 15; and a regular joining process for inserting a rotating tip side pin F3 into the component 3, and performing friction agitation on a first abutting part J1 while pouring a second aluminum alloy, which is the component 3, into a gap at the time of moving a rotary tool F along a set moving route L1 which is set on the surface of the component 3 in a state where the outer circumferential surface of the tip side pin F3 is brought into slight contact with a step side surface 17b of the column step part 17 while the outer circumstantial surface of a base end side pin F2 is brought int contact with the surface of the component 3. In the regular joining process, the rotating tip side pin F3 is inserted from the start position set on a set moving route L1, and the tip side pin F3 is gradually pushed in while being moved in the advancing direction thereof until reaching a predetermined depth.SELECTED DRAWING: Figure 8

Description

The present invention relates to a joining method.

For example, Patent Document 1 discloses a method for manufacturing a liquid-cooled jacket. FIG. 16 is a cross-sectional view showing a conventional method for manufacturing a liquid-cooled jacket. In the conventional method for manufacturing a liquid-cooled jacket, the butt portion J10 formed by abutting the step side surface 101c provided on the step portion of the aluminum alloy jacket body 101 and the side surface 102c of the aluminum alloy sealing body 102. This is to perform friction stir welding. Further, in the conventional method for manufacturing a liquid-cooled jacket, friction stir welding is performed by inserting only the stirring pin F42 into the butt portion J10 while separating the connecting portion F41 of the rotating tool F40 from the jacket body 101 and the sealing body 102. ing. Further, in the conventional method for manufacturing a liquid-cooled jacket, the rotation center axis Z of the rotation tool F40 is overlapped with the butt portion J10 and relatively moved.

Japanese Unexamined Patent Publication No. 2015-131321

Here, the jacket body 101 tends to have a complicated shape. For example, a jacket body 101 formed of a cast material of 4000 series aluminum alloy and a relatively simple shape such as a sealing body 102 is a wrought material of 1000 series aluminum alloy. In some cases, it is formed by. In this way, a liquid-cooled jacket may be manufactured by joining members of different grades of aluminum alloy. In such a case, the jacket body 101 generally has a higher hardness than the sealing body 102. Therefore, when friction stir welding is performed as shown in FIG. 16, the stirring pin is on the sealing body 102 side. The material resistance received from the jacket body 101 side is larger than the material resistance received from the jacket body 101. Therefore, it becomes difficult to stir different grades in a well-balanced manner by the stirring pin F42 of the rotating tool F40, and there is a problem that cavity defects occur in the plasticized region after joining and the joining strength decreases.

Further, when the stirring pin F42 is inserted into the butt portion J10, the stirring pin F42 is pushed in in the vertical direction until it reaches a predetermined depth, so that the frictional heat at the start position of frictional stirring becomes excessive. As a result, at the start position, the metal on the jacket body 101 side is likely to be mixed into the sealing body 102, which causes a problem of contributing to poor joining.

On the other hand, when the stirring pin F42 is pulled out from the butt portion J10 and separated, the stirring pin F42 is pulled out in the vertical direction, so that the frictional heat at the end position of frictional stirring becomes excessive. As a result, at the end position, the metal on the jacket body 101 side is likely to be mixed into the sealing body 102, which causes a problem of contributing to poor joining.

From such a viewpoint, it is an object of the present invention to provide a joining method capable of suitably joining columns and members of different grades.

In order to solve the above problems, the present invention is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by friction stir welding, and the support column is made of a first aluminum alloy. The member is formed of a second aluminum alloy, the first aluminum alloy is a material having a higher hardness than the second aluminum alloy, and the rotary tool used for friction stir welding is a base end side pin. The taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and a stepped pin step portion is formed on the outer peripheral surface of the base end side pin. A preparatory step of forming a strut step portion having a step bottom surface at the tip of the strut and a step side surface that rises diagonally from the step bottom surface so that the tip of the strut is tapered, and the member is placed on the strut. As a result, the mounting step of forming the first abutting portion so that there is a gap when the step side surface of the strut step portion and the hole wall of the hole portion are abutted, and the rotating tip side pin of the member. The surface of the member is in a state where the outer peripheral surface of the base end side pin is in contact with the surface of the member and the outer peripheral surface of the tip end side pin is slightly in contact with the step side surface of the support column step portion. The main joining step of performing friction stir welding on the first butt portion while flowing the second aluminum alloy of the member into the gap when moving the rotation tool along the set movement route set in. Including, in the main joining step, the tip side pin that rotates from the start position set on the set movement route is inserted, and the tip side pin is gradually pushed in until it reaches a predetermined depth while moving in the traveling direction. It is characterized by that.

Further, the present invention is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by frictional stirring, and the support column is made of a first aluminum alloy. The member is made of a second aluminum alloy, the first aluminum alloy is a material having a higher hardness than the second aluminum alloy, and the rotation tool used for friction stirring includes a base end side pin and a tip end side pin. The taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and a stepped pin step portion is formed on the outer peripheral surface of the base end side pin, and a step is formed on the tip of the support column. The support step is formed by forming a support step portion having a bottom surface and a step side surface that rises diagonally from the bottom surface of the step so that the tip of the support is tapered, and by placing the member on the support, the support step is A mounting step of forming a first butt portion so that there is a gap when the stepped side surface of the portion and the hole wall of the hole portion are abutted, and the rotating tip side pin is inserted into the member to form the base. The setting movement set on the surface of the member in a state where the outer peripheral surface of the end side pin is in contact with the surface of the member and the outer peripheral surface of the tip end side pin is slightly in contact with the step side surface of the support column step portion. The main joining step includes a main joining step of frictionally stirring the first butted portion while flowing the second aluminum alloy of the member into the gap when moving the rotating tool along the route. After inserting the rotating tip-side pin at a start position set further away from the support column than the set movement route, the rotation center axis of the rotation tool is moved to a position overlapping the set movement route. It is characterized in that the tip side pin is gradually pushed in until it reaches a predetermined depth.

Further, the present invention is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by frictional stirring, and the support column is made of a first aluminum alloy. The member is made of a second aluminum alloy, the first aluminum alloy is a material having a higher hardness than the second aluminum alloy, and the rotation tool used for friction stirring includes a base end side pin and a tip end side pin. The taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and a stepped pin step portion is formed on the outer peripheral surface of the base end side pin, and a step is formed on the tip of the support column. The support step is formed by forming a support step portion having a bottom surface and a step side surface that rises diagonally from the bottom surface of the step so that the tip of the support is tapered, and by placing the member on the support, the support step is A mounting step of forming a first butt portion so that there is a gap when the stepped side surface of the portion and the hole wall of the hole portion are abutted, and the rotating tip side pin is inserted into the member to form the base. The setting movement set on the surface of the member in a state where the outer peripheral surface of the end side pin is in contact with the surface of the member and the outer peripheral surface of the tip end side pin is slightly in contact with the step side surface of the support column step portion. The main joining step includes a main joining step of frictionally stirring the first butted portion while flowing the second aluminum alloy of the member into the gap when moving the rotating tool along the route. In, the end position is set on the set movement route, and after frictional stirring with respect to the first butt portion, the tip side pin is gradually pulled out while moving the rotation tool to the end position, and the end position is the same. It is characterized in that the rotating tool is detached from the member.

Further, the present invention is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by frictional stirring, and the support column is made of a first aluminum alloy. The member is made of a second aluminum alloy, the first aluminum alloy is a material having a higher hardness than the second aluminum alloy, and the rotation tool used for friction stirring includes a base end side pin and a tip end side pin. The taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and a stepped pin step portion is formed on the outer peripheral surface of the base end side pin, and a step is formed on the tip of the support column. The support step is formed by forming a support step portion having a bottom surface and a step side surface that rises diagonally from the bottom surface of the step so that the tip of the support is tapered, and by placing the member on the support, the support step is A mounting step of forming a first butt portion so that there is a gap when the stepped side surface of the portion and the hole wall of the hole portion are abutted, and the rotating tip side pin is inserted into the member to form the base. The setting movement set on the surface of the member in a state where the outer peripheral surface of the end side pin is in contact with the surface of the member and the outer peripheral surface of the tip end side pin is slightly in contact with the step side surface of the support column step portion. The main joining step includes a main joining step of frictionally stirring the first butted portion while flowing the second aluminum alloy of the member into the gap when moving the rotating tool along the route. In, the end position is set on the side further separated from the support column from the set movement route, and after frictional stirring with respect to the first butt portion, the tip side pin is gradually moved while moving the rotation tool to the end position. It is characterized in that the rotating tool is separated from the member at the end position by being pulled out.

According to such a joining method, the second aluminum alloy mainly on the member side of the first butt portion is agitated and plastically fluidized by the frictional heat between the member and the tip side pin. Therefore, in the first butt portion, the step side surface of the column step portion and the hole wall of the hole portion can be joined. Further, since the outer peripheral surface of the tip side pin is kept in contact with the step side surface of the strut step portion slightly, it is possible to minimize the mixing of the first aluminum alloy from the strut to the member. As a result, in the first butt portion, the second aluminum alloy on the member side is mainly frictionally agitated, so that a decrease in joint strength can be suppressed. Further, by pressing the member with the outer peripheral surface of the base end side pin, the occurrence of burrs can be suppressed.

Further, by gradually pushing the tip side pin until it reaches a predetermined depth while moving the rotation tool on the set movement route, it is possible to prevent the frictional heat from becoming excessive at one point of the set movement route.
Further, by gradually pushing the tip side pin until it reaches a predetermined depth while moving the rotation tool to a position overlapping the set movement route, it is possible to prevent the frictional heat from becoming excessive on the set movement route. ..

Further, by gradually pulling out the tip side pin while moving the rotation tool on the set movement route, it is possible to prevent the frictional heat from becoming excessive at one point of the set movement route.
Further, by gradually pulling out the tip side pin while moving the rotation tool from a position overlapping the set movement route, it is possible to prevent the frictional heat from becoming excessive on the set movement route.
As a result, it is possible to prevent the first aluminum alloy of the column from being mixed into the member side on the set movement route.

Further, in the previously described step, the step bottom surface of the strut step portion and the back surface of the member are overlapped to form a second butt portion, and in the main joining step, the tip end side pin is attached to the step bottom surface of the strut step portion. It is preferable to move the rotating tool along the second butt portion to perform friction stir welding in a state of being slightly in contact with the surface.

According to such a joining method, the joining strength of the second butt portion can be increased.

Further, in the preparation step, it is preferable to set the thickness of the member so as to be larger than the height dimension of the step side surface of the support column step portion.

According to such a joining method, it is possible to prevent a metal shortage at the joining portion in the main joining step.

Further, in the main joining step, it is preferable to set the traveling direction and the rotating direction of the rotating tool so that the advancing side of the rotating tool is the support column side.

According to such a joining method, the stirring action by the base end side pin and the tip end side pin around the first butt portion is enhanced, the temperature rise in the first butt portion can be expected, and the step side surface and the member are brought together in the first butt portion. It can be joined more reliably.

Further, the present invention is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by frictional stirring, and the support column is made of copper or a copper alloy. The member is made of aluminum or an aluminum alloy, and the rotating tool used for friction stirring includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin. Large, a stepped pin step portion is formed on the outer peripheral surface of the base end side pin, and the step bottom surface is formed at the tip of the column, and the tip of the column rises diagonally from the step bottom surface so as to taper. A gap is created when the stepped side surface of the strut stepped portion and the hole wall of the hole are abutted by the preparatory step of forming the strut stepped portion having the stepped side surface and the placement of the member on the strut. The mounting step of forming the first butt portion and the tip side pin that rotates while the tip end side pin is inserted into the member and the outer peripheral surface of the base end side pin is brought into contact with the surface of the member. When the rotating tool is moved along the set movement route set on the surface of the member without contacting the outer peripheral surface of the support with the step side surface of the support step portion, the aluminum or aluminum alloy of the member is placed in the gap. In the main joining step, which includes a main joining step of frictionally stirring the first butt portion while flowing in, the tip side pin that rotates from a set start position on the set movement route is inserted. The tip side pin is gradually pushed in until it reaches a predetermined depth while moving in the traveling direction.

Further, the present invention is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by frictional stirring, and the support column is made of copper or a copper alloy. The member is made of aluminum or an aluminum alloy, and the rotating tool used for friction stirring includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin. Large, a stepped pin step portion is formed on the outer peripheral surface of the base end side pin, and the step bottom surface is formed at the tip of the column, and the tip of the column rises diagonally from the step bottom surface so as to taper. In the preparatory step of forming the stepped portion of the column having the stepped side surface, and by placing the member on the column, a gap is created when the stepped side surface of the stepped portion of the column and the hole wall of the hole portion are abutted against each other. The mounting step of forming the first butt portion and the tip side pin that rotates while the tip end side pin is inserted into the member and the outer peripheral surface of the base end side pin is brought into contact with the surface of the member. When the rotating tool is moved along the set movement route set on the surface of the member without contacting the outer peripheral surface of the support with the step side surface of the support step portion, the aluminum or aluminum alloy of the member is placed in the gap. In the main joining step, which includes a main joining step of frictionally stirring the first butt portion while flowing in, the rotating tip side pin is further separated from the support column than the set movement route. After inserting it into the set start position, the tip side pin is gradually pushed in until the depth reaches a predetermined depth while moving the rotation center axis of the rotation tool to a position overlapping the set movement route.

Further, the present invention is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by frictional stirring, and the support column is made of copper or a copper alloy. The member is made of aluminum or an aluminum alloy, and the rotating tool used for friction stirring includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin. Large, a stepped pin step portion is formed on the outer peripheral surface of the base end side pin, and the step bottom surface is formed at the tip of the column, and the tip of the column rises diagonally from the step bottom surface so as to taper. A gap is created when the stepped side surface of the strut stepped portion and the hole wall of the hole are abutted by the preparatory step of forming the strut stepped portion having the stepped side surface and the placement of the member on the strut. The mounting step of forming the first butt portion and the tip side pin that rotates while the tip end side pin is inserted into the member and the outer peripheral surface of the base end side pin is brought into contact with the surface of the member. When the rotating tool is moved along the set movement route set on the surface of the member without contacting the outer peripheral surface of the support with the step side surface of the support step portion, the aluminum or aluminum alloy of the member is placed in the gap. In the main joining step, the end position is set on the set movement route, and the friction stirring with respect to the first butt portion is included. After that, while moving the rotation tool to the end position, the tip side pin is gradually pulled out to separate the rotation tool from the member at the end position.

Further, the present invention is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by frictional stirring, and the support column is made of copper or a copper alloy. The member is made of aluminum or an aluminum alloy, and the rotating tool used for friction stirring includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin. Large, a stepped pin step portion is formed on the outer peripheral surface of the base end side pin, and the step bottom surface is formed at the tip of the column, and the tip of the column rises diagonally from the step bottom surface so as to taper. A gap is created when the stepped side surface of the strut stepped portion and the hole wall of the hole are abutted by the preparatory step of forming the strut stepped portion having the stepped side surface and the placement of the member on the strut. The mounting step of forming the first butt portion and the tip side pin that rotates while the tip end side pin is inserted into the member and the outer peripheral surface of the base end side pin is brought into contact with the surface of the member. When the rotating tool is moved along the set movement route set on the surface of the member without contacting the outer peripheral surface of the support with the step side surface of the support step portion, the aluminum or aluminum alloy of the member is placed in the gap. In the main joining step, the end position is set on the side further separated from the support column from the set movement route, and the end position is set. After frictional stirring with respect to the first butt portion, the rotary tool is moved to the end position and the tip end side pin is gradually pulled out to separate the rotary tool from the member at the end position.

According to such a joining method, the frictional heat between the member and the tip side pin stirs and plastically fluidizes the aluminum or aluminum alloy mainly on the member side of the first butt portion, and the step side surface and the hole of the hole portion in the first butt portion. Can be joined to the wall. Further, since the tip side pin is brought into contact with only the member to perform friction stir welding, copper or copper alloy is hardly mixed from the support column to the member. As a result, since the aluminum or aluminum alloy on the member side is mainly frictionally agitated in the first butt portion, it is possible to suppress a decrease in joint strength. Further, by pressing the member with the outer peripheral surface of the base end side pin, the occurrence of burrs can be suppressed.

Further, by gradually pushing the tip side pin until it reaches a predetermined depth while moving the rotation tool on the set movement route, it is possible to prevent the frictional heat from becoming excessive at one point of the set movement route.
Further, by gradually pushing the tip side pin until it reaches a predetermined depth while moving the rotation tool to a position overlapping the set movement route, it is possible to prevent the frictional heat from becoming excessive on the set movement route. ..

Further, by gradually pulling out the tip side pin while moving the rotation tool on the set movement route, it is possible to prevent the frictional heat from becoming excessive at one point of the set movement route.
Further, by gradually pulling out the tip side pin while moving the rotation tool from a position overlapping the set movement route, it is possible to prevent the frictional heat from becoming excessive on the set movement route.
As a result, it is possible to prevent the copper or copper alloy of the columns from being mixed into the member side on the set movement route.

Further, in the previously described step, the step bottom surface of the strut step portion and the back surface of the member are overlapped to form a second butt portion, and in the main joining step, the tip end side pin is attached to the step bottom surface of the strut step portion. It is preferable to move the rotating tool along the second butt portion to perform friction stir welding without contacting the surface.

According to such a joining method, it is possible to prevent the inflow of copper or copper alloy from the column to the member side at the second butt portion.

Further, in the preparation step, it is preferable to set the thickness of the member so as to be larger than the height dimension of the step side surface of the support column step portion.

According to such a joining method, it is possible to prevent a metal shortage at the joining portion in the main joining step.

Further, in the main joining step, it is preferable to set the traveling direction and the rotating direction of the rotating tool so that the advancing side of the rotating tool is the support column side.

According to such a joining method, the stirring action by the base end side pin and the tip end side pin around the first butt portion is enhanced, the temperature rise in the first butt portion can be expected, and the step side surface and the member are brought together in the first butt portion. It can be joined more reliably.

Further, in the main joining step, it is preferable that the rotary tool is moved along the first butt portion and is made to go around the support column to perform friction stir welding.

According to the present invention, the support column and the member can be joined over the entire circumference of the support column.

According to the present invention, it is possible to provide a joining method capable of suitably joining columns and members of different grades.

It is a side view which shows the rotation tool which concerns on embodiment of this invention. It is an enlarged sectional view of the rotation tool. It is sectional drawing which shows the 1st modification of a rotation tool. It is sectional drawing which shows the 2nd modification of the rotation tool. It is sectional drawing which shows the 3rd modification of the rotation tool. It is a perspective view which shows the preparation process of the joining method which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the mounting process of the joining method which concerns on 1st Embodiment. It is a perspective view which shows the joining process of the joining method which concerns on 1st Embodiment. It is sectional drawing which shows the joining process of the joining method which concerns on 1st Embodiment. It is a top view which shows the state after the main joining process of the joining method which concerns on 1st Embodiment. It is a top view which shows the state after the main joining process of the joining method which concerns on 1st Embodiment. It is a perspective view which shows the main joining process of the joining method which concerns on 2nd Embodiment. It is a top view which shows the state after the main joining process of the joining method which concerns on 2nd Embodiment. It is a top view which shows the state after the main joining process of the joining method which concerns on 2nd Embodiment. It is sectional drawing which shows the joining process of the joining method which concerns on a modification. It is sectional drawing which shows the manufacturing method of the conventional liquid-cooled jacket.

[First Embodiment]
The first embodiment of the present invention will be described with reference to the drawings as appropriate. First, the rotation tool used in the joining method according to the present embodiment will be described. The rotary tool is a tool used for friction stir welding. As shown in FIG. 1, the rotary tool F is made of, for example, tool steel, and is mainly composed of a base shaft portion F1, a base end side pin F2, and a tip end side pin F3. The base shaft portion F1 has a columnar shape and is a portion connected to the main shaft of the friction stir welder.

The base end side pin F2 is continuous with the base shaft portion F1 and is tapered toward the tip end. The proximal end side pin F2 has a truncated cone shape. The taper angle A of the base end side pin F2 may be appropriately set, and is, for example, 135 to 160 °. If the taper angle A is less than 135 ° or exceeds 160 °, the joint surface roughness after friction stir welding becomes large. The taper angle A is larger than the taper angle B of the tip side pin F3, which will be described later. As shown in FIG. 2, a stepped pin step portion F21 is formed on the outer peripheral surface of the base end side pin F2 over the entire height direction. The pin step portion F21 is formed in a spiral shape in a clockwise or counterclockwise direction. That is, the pin step portion F21 has a spiral shape when viewed in a plane and a step shape when viewed from a side surface. In the present embodiment, in order to rotate the rotation tool F clockwise, the pin step portion F21 is set counterclockwise from the base end side to the tip end side.

When rotating the rotation tool F counterclockwise, it is preferable to set the pin step portion F21 clockwise from the base end side to the tip end side. As a result, the plastic fluid material is guided to the tip side by the pin step portion F21, so that the metal that overflows to the outside of the metal member to be joined can be reduced. The pin step portion F21 is composed of a step bottom surface F21a and a step side surface F21b. The distance X1 (horizontal distance) between the vertices F21c and F21c of the adjacent pin step portions F21 is appropriately set according to the step angle C and the height Y1 of the step side surface F21b described later.

The height Y1 of the step side surface F21b may be appropriately set, and is set to, for example, 0.1 to 0.4 mm. If the height Y1 is less than 0.1 mm, the joint surface roughness becomes large. On the other hand, when the height Y1 exceeds 0.4 mm, the joint surface roughness tends to increase, and the number of effective step portions (the number of pin step portions F21 in contact with the metal member to be joined) also decreases.

The step angle C formed by the step bottom surface F21a and the step side surface F21b may be appropriately set, but is set to, for example, 85 to 120 °. The step bottom surface F21a is parallel to the horizontal plane in this embodiment. The step bottom surface F21a may be inclined in the range of -5 ° to 15 ° with respect to the horizontal plane from the rotation axis of the tool toward the outer peripheral direction (minus is downward with respect to the horizontal plane, plus is with respect to the horizontal plane). Above). The distance X1, the height Y1 of the step side surface F21b, the step angle C, and the angle of the step bottom surface F21a with respect to the horizontal plane are such that the plastic fluid does not stay inside the pin step portion F21 and adhere to the outside during friction stir welding. The surface roughness of the joint is appropriately set so that the plastic fluid material can be pressed by the step bottom surface F21a to reduce the roughness of the joint surface.

As shown in FIG. 1, the distal end side pin F3 is continuously formed on the proximal end side pin F2. The tip side pin F3 has a truncated cone shape. The tip of the tip side pin F3 is a flat surface F4 perpendicular to the rotation axis. The taper angle B of the tip end side pin F3 is smaller than the taper angle A of the base end side pin F2. As shown in FIG. 2, a spiral groove F31 is engraved on the outer peripheral surface of the tip end side pin F3. The spiral groove F31 may be clockwise or counterclockwise, but in the present embodiment, the spiral groove F31 is carved counterclockwise from the base end side to the tip end side in order to rotate the rotation tool F clockwise.

When rotating the rotation tool F counterclockwise, it is preferable to set the spiral groove F31 clockwise from the base end side to the tip end side. As a result, the plastic fluid material is guided to the tip side by the spiral groove F31, so that the metal overflowing to the outside of the metal member to be joined can be reduced. The spiral groove F31 is composed of a spiral bottom surface F31a and a spiral side surface F31b. The distance (horizontal distance) between the vertices F31c and F31c of the adjacent spiral grooves F31 is defined as the length X2. The height of the spiral side surface F31b is defined as the height Y2. The spiral angle D composed of the spiral bottom surface F31a and the spiral side surface F31b is formed at, for example, 45 to 90 °. The spiral groove F31 has a role of increasing frictional heat by coming into contact with the metal member to be joined and guiding the plastic fluid material to the tip side.

The design of the rotation tool F can be changed as appropriate. FIG. 3 is a side view showing a first modification of the rotation tool of the present invention. As shown in FIG. 3, in the rotation tool FA according to the first modification, the step angle C formed by the step bottom surface F21a of the pin step portion F21 and the step side surface F21b is 85 °. The step bottom surface F21a is parallel to the horizontal plane. As described above, the step bottom surface F21a is parallel to the horizontal plane, and the step angle C may be an acute angle within a range in which the plastic fluid material stays in the pin step portion F21 during friction stir welding and escapes to the outside without adhering. ..

FIG. 4 is a side view showing a second modification of the rotation tool of the present invention. As shown in FIG. 4, in the rotation tool FB according to the second modification, the step angle C of the pin step portion F21 is 115 °. The step bottom surface F21a is parallel to the horizontal plane. As described above, the step bottom surface F21a may be parallel to the horizontal plane, and the step angle C may be obtuse within the range in which the step bottom surface F21a functions as the pin step portion F21.

FIG. 5 is a side view showing a third modification of the rotation tool of the present invention. As shown in FIG. 5, in the rotation tool FC according to the third modification, the step bottom surface F21a is inclined 10 ° upward with respect to the horizontal plane from the rotation axis of the tool toward the outer peripheral direction. The step side surface F21b is parallel to the vertical surface. As described above, the step bottom surface F21a may be formed so as to incline upward from the horizontal plane from the rotation axis of the tool toward the outer peripheral direction within a range in which the plastic fluid material can be pressed during friction stir welding. The same effect as that of the following embodiment can be obtained by the first to third modifications of the rotation tool described above.

Next, the joining method according to the first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 6, the joining method of the present embodiment is to join the support column 15 and the member (hereinafter, also referred to as “sealing body”) 3 by friction stir welding. Here, the support column 15 is joined. An example shows a case where the provided jacket body 2 and the sealing body 3 are joined. The present invention is a joining method for joining a support column and a member, and the shape of the support column, the shape of the member, the application, and the like are not particularly limited.

The joining method of the present embodiment is to manufacture a liquid-cooled jacket 1 by friction-stir welding the jacket body 2 and the sealing body 3. The liquid-cooled jacket 1 is a member in which a heating element (not shown) is installed on the sealing body 3 and a fluid is allowed to flow inside to exchange heat with the heating element. The "front surface" in the following description means the surface opposite to the "back surface".

The joining method according to the present embodiment includes a preparation step, a mounting step, and a main joining step. The preparation step is a step of preparing the jacket body 2 and the sealing body 3. The jacket body 2 is mainly composed of a bottom portion 10, a peripheral wall portion 11, and a plurality of columns 15. The jacket body 2 is formed mainly containing a first aluminum alloy. As the first aluminum alloy, for example, an aluminum alloy casting material such as JISH5302 ADC12 (Al—Si—Cu system) is used.

As shown in FIG. 6, the bottom portion 10 is a plate-shaped member having a rectangular shape in a plan view. The peripheral wall portion 11 is a wall portion that rises in a rectangular frame shape from the peripheral edge portion of the bottom portion 10. A peripheral wall step portion 12 is formed on the inner peripheral edge of the peripheral wall portion 11. The peripheral wall step portion 12 is composed of a step bottom surface 12a and a step side surface 12b rising from the step bottom surface 12a. As shown in FIG. 2, the step side surface 12b is inclined so as to spread outward from the step bottom surface 12a toward the opening. The inclination angle β (FIG. 7) of the step side surface 12b may be appropriately set, and is, for example, 3 ° to 30 ° with respect to the vertical plane. A recess 13 is formed in the bottom portion 10 and the peripheral wall portion 11.

As shown in FIG. 6, the support column 15 rises vertically from the bottom portion 10. The number of columns 15 is not particularly limited, but in the present embodiment, four columns are formed. Further, although the shape of the support column 15 is columnar in the present embodiment, it may be another shape such as a prism. A protrusion 16 is formed at the tip of the support column 15. The shape of the protruding portion 16 is not particularly limited, but in the present embodiment, it has a truncated cone shape. The height of the protruding portion 16 is smaller than the plate thickness of the sealing body 3.

By forming the projecting portion 16, a strut step portion 17 is formed at the tip of the strut 15. The strut step portion 17 is composed of a step bottom surface 17a and a step side surface 17b rising from the step bottom surface 17a. The step bottom surface 17a is formed at the same height as the step bottom surface 12a of the peripheral wall step portion 12. The height dimension of the step side surface 17b is smaller than the plate thickness of the sealing body 3. The step side surface 17b is inclined so as to be separated from the hole wall 4a so as to taper toward the tip.

The sealing body 3 is a plate-shaped member that seals the opening of the jacket body 2. The sealing body 3 has a size to be placed on the peripheral wall step portion 12. The plate thickness of the sealing body 3 is larger than the height of the step side surface 12b. A hole 4 is formed in the sealing body 3 at a position corresponding to the support column 15. The hole 4 is formed so that the protrusion 16 is fitted. The sealing body 3 is formed mainly containing a second aluminum alloy. The second aluminum alloy is a material having a lower hardness than the first aluminum alloy. The second aluminum alloy is formed of, for example, an aluminum alloy wrought material such as JIS A1050, A1100, A6063. In the present specification, the hardness refers to Brinell hardness, which can be measured by a method according to JIS Z 2243.

As shown in FIG. 7, the mounting step is a step of mounting the sealing body 3 on the jacket body 2. In the mounting step, the back surface 3b of the sealing body 3 is mounted on the bottom surface 12a of the step. The step side surface 12b and the outer peripheral side surface 3c of the sealing body 3 are abutted to form the butt portion J11. Further, the step bottom surface 12a and the back surface 3b of the sealing body 3 are abutted to form the butt portion J12.

Further, in the mounting step, the hole wall 4a of the hole portion 4 and the step side surface 17b of the column step portion 17 are abutted to form the first abutting portion J1. The first abutment portion J1 may include a case where the hole wall 4a and the step side surface 17b of the strut step portion 17 are butted with a gap having a substantially V-shaped cross section. Further, the back surface 3b of the sealing body 3 and the step bottom surface 17a of the column step portion 17 are butted to form the second butted portion J2.

As shown in FIGS. 8 and 9, this joining step is a step of friction stir welding the first butt portion J1 using the rotary tool F. In this joining step, the intrusion section from the start position SP to the intermediate point S1 (see FIG. 10), the main section from the intermediate point S1 on the set movement route L1 to the intermediate point S2 (see FIG. 10), and the intermediate point S2 (see FIG. 10). The three sections of the detachment section from the intermediate point S2 to the end position EP (see FIG. 10) are continuously frictionally agitated. The intermediate points S1 and S2 are set on the set movement route L1.

The set movement route L1 has an annular shape and is set so as to surround the protrusion 16. The set movement route L1 is preferably set outside the hole wall 4a of the hole portion 4, but may be set inside the hole wall 4a or at a position of the hole wall 4a. The distance from the set movement route L1 to the hole wall 4a should be constant (that is, the set movement route L1 and the hole wall 4a should be concentric circles). In the closet section, the tip side pin F3 rotated clockwise is inserted into the start position SP set on the set movement route L1, and the tip side pin F3 is lowered to a predetermined depth while moving in the traveling direction to seal the seal. Gradually push into 3.

When the intermediate point S1 is reached, the process proceeds to friction stir welding in this section as it is. As shown in FIGS. 9 and 10, in this section, the rotation tool F is moved by a predetermined depth while overlapping the rotation center axis Z and the set movement route L1. The “predetermined depth” means the depth at which the tip end side pin F3 is inserted in this section from the intermediate point S1 to the intermediate point S2 on the set movement route L1. In this section, the "predetermined depth" of the tip-side pin F3 is set so that the flat surface F4 of the tip-side pin F3 does not reach the step bottom surface 17a. The "predetermined depth" of the tip-side pin F3 may be appropriately set, and for example, the flat surface F4 of the tip-side pin F3 may be set to reach the step bottom surface 17a.

In this section of the main joining step, as shown in FIG. 9, the outer peripheral surface of the tip side pin F3 is slightly brought into contact with the step side surface 17b of the strut step portion 17. Further, the outer peripheral surface of the base end side pin F2 is brought into contact with the surface 3a of the sealing body 3. In this state, when the rotary tool F is moved counterclockwise along the first butt portion J1, friction stir is performed while the second aluminum alloy of the sealing body 3 is allowed to flow into the gap of the first butt portion J1. .. At this time, at least the outer peripheral surface of the tip side pin F3 and the step side surface 17b of the strut step portion 17 slightly scrape off the first aluminum alloy on the strut 15 side, and the first aluminum alloy is moved to the sealing body 3 side. mixing. A plasticized region W1 is formed on the movement locus of the rotation tool F by hardening the frictionally agitated metal.

Here, the contact allowance of the outer peripheral surface of the tip side pin F3 with respect to the step side surface 17b is defined as the offset amount N. When the outer peripheral surface of the tip side pin F3 is slightly brought into contact with the step side surface 17b and the flat surface F4 of the tip side pin F3 is not brought into contact with the step bottom surface 17a as in the present embodiment, the offset amount N is set to, for example. , 0 <N ≦ 0.5 mm, preferably 0 <N ≦ 0.25 mm.

As shown in FIG. 10, when the rotation tool F makes a round around the protrusion 16 along the set movement route L1 and reaches the intermediate point S2, the rotation tool F shifts to the departure section as it is. In the detachment section, while moving the rotation tool F to the end position EP set on the set movement route L1, the tip side pin F3 is raised and gradually pulled out, and the rotation tool F is detached from the sealing body 3 at the end position EP. .. As shown in FIG. 11, the end position EP may be set on the side further away from the support column 15 than the set movement route L1 (that is, outside the set movement route L1). Even in that case, after the rotation tool F is made to go around the protrusion 16 along the set movement route L1, the tip side pin F3 is moved while moving the rotation tool F to the end position EP set outside the set movement route L1. Is gradually pulled out from the sealing body 3, and the rotating tool F is separated from the sealing body 3 at the end position EP.

According to the joining method according to the present embodiment described above, the second aluminum alloy mainly on the sealing body 3 side of the first butt portion J1 is agitated by the frictional heat between the sealing body (member) 3 and the tip side pin F3. Is plastically fluidized. Therefore, in the first butt portion J1, the step side surface 17b of the column step portion 17 and the hole wall 4a of the hole portion 4 can be joined. Further, since the outer peripheral surface of the tip side pin F3 is kept slightly in contact with the step side surface 17b of the support column step portion 17, it is possible to minimize the mixing of the first aluminum alloy from the support column 15 into the sealing body 3. As a result, in the first butt portion J1, the second aluminum alloy on the sealing body 3 side is mainly frictionally agitated, so that a decrease in joint strength can be suppressed.

Further, in the closet section of the main joining process shown in FIGS. 10 and 11, the rotary tool F is moved on the set movement route L1 and the tip side pin F3 is gradually pushed in until the depth reaches a predetermined depth, so that the set movement is performed. It is possible to prevent the frictional heat from becoming excessive at one point of the route L1.
Further, in the detachment section of the main joining step shown in FIG. 10, the frictional heat becomes excessive at one point of the set movement route L1 by gradually pulling out the tip side pin F3 while moving the rotation tool F on the set movement route L1. It can be prevented from becoming.

Further, in the detachment section of the main joining step shown in FIG. 11, the frictional heat is generated on the set movement route L1 by gradually pulling out the tip side pin F3 while moving the rotation tool F from the position overlapping with the set movement route L1. It can be prevented from becoming excessive.
As a result, it is possible to prevent the first aluminum alloy of the support column 15 from being mixed into the sealing body (member) 3 side on the set movement route L1.

Further, in this joining step, since the step side surface 17b of the strut step portion 17 is inclined in a direction away from the hole wall 4a toward the tip (so that the tip of the strut 15 is tapered), the tip side pin F3 And contact with the support column 15 can be easily avoided. Further, in the present embodiment, the inclination angle γ of the step side surface 17b (FIG. 7) and the inclination angle α of the tip side pin F3 (FIG. 1) are the same (the step side surface 17b and the outer peripheral surface of the tip side pin F3 are parallel to each other). ), It is possible to make the tip side pin F3 and the step side surface 17b as close as possible while avoiding contact between the tip side pin F3 and the step side surface 17b.

Further, the rotation tool F of the present embodiment has a configuration including a proximal end side pin F2 and a distal end side pin F3 having a taper angle smaller than the taper angle A of the proximal end side pin F2. This makes it easier to insert the rotation tool F into the sealant 3. Further, since the taper angle B of the tip side pin F3 is small, the rotation tool F can be easily inserted to a deep position of the sealing body 3.

Further, since the plastic fluid material can be pressed on the outer peripheral surface of the base end side pin F2, the stepped concave groove formed on the joint surface can be reduced, and the bulging portion formed on the side of the stepped concave groove can be reduced. Can be eliminated or reduced. Further, since the stepped pin step portion F21 is shallow and has a wide outlet, the plastic fluid material is easily pulled out of the pin step portion F21 while being pressed by the step bottom surface F21a. Therefore, even if the plastic fluid material is pressed by the base end side pin F2, the plastic fluid material is unlikely to adhere to the outer peripheral surface of the base end side pin F2. Therefore, the roughness of the joint surface can be reduced, and the joint quality can be suitably stabilized.

Further, in this joining step, the rotation direction and the traveling direction of the rotation tool F may be appropriately set, but of the plasticized region W1 formed in the movement locus of the rotation tool F, the support column 15 side becomes the shear side and seals. The rotation direction and the traveling direction of the rotation tool F were set so that the body 3 side was the flow side. By setting the support column 15 side to be the shear side, the stirring action by the base end side pin F2 and the tip end side pin F3 around the first butt portion J1 is enhanced, and the temperature rise in the first butt portion J1 can be expected. At the first butt portion J1, the step side surface 17b and the sealing body 3 can be more reliably joined.

The shear side (Advancing side) is the relative speed of the outer circumference of the rotating tool with respect to the jointed portion, which is the value obtained by adding the magnitude of the moving speed to the magnitude of the tangential velocity on the outer circumference of the rotating tool. Means the side. On the other hand, the flow side (Retreating side) refers to the side in which the relative speed of the rotating tool with respect to the joint is reduced by rotating the rotating tool in the direction opposite to the moving direction of the rotating tool.
Further, in the preparation step, the thickness of the sealing body 3 is set to be larger than the height dimension of the step side surface 17b of the column step portion 17. According to such a joining method, it is possible to prevent a metal shortage at the joining portion.

Further, in this joining step, the step bottom surface 17a of the column step portion 17 and the flat surface F4 of the tip end side pin F3 are separated from each other, but the plasticized region W1 reaches the step bottom surface 17a. Thereby, the joint strength of the second butt portion J2 can be increased. Further, in this joining step, since the rotary tool F is moved along the first butt portion J1 and circulates around the support column 15 to perform friction stir welding, the joining strength can be increased and the first butt portion J1 Watertightness and airtightness can be improved.

In this joining step, the rotary tool F is moved along the second butt portion J2 to perform friction stir welding in a state where the tip side pin F3 is slightly in contact with the step bottom surface 17a of the column step portion 17. It may be (not shown). According to such a joining method, the joining strength can be further increased, and the mixing of the first aluminum alloy from the support column 15 side to the sealing body 3 side can be prevented as much as possible. Further, the butt portions J11 and J12 may be appropriately joined by a method such as friction stir welding.

[Second Embodiment]
The joining method according to the second embodiment of the present invention will be described in detail with reference to the drawings. Since the difference from the first embodiment is the main joining step, the differences in the main joining step will be described below, and the description of the preparation step and the mounting step will be omitted.

In the main joining step of the present embodiment, the setting of the start position SP is different from that of the first embodiment. In the first embodiment, the start position SP was set on the set movement route L1 as shown in FIG. 8, but in the second embodiment, as shown in FIG. 12, the starting position SP is further set from the support column 15 than the set movement route L1. The start position SP is set on the separated side (that is, outside the set movement route L1). In the present embodiment, the tip side pin F3 rotated clockwise is inserted into the start position SP set outside the set movement route L1, and the tip side is moved to the intermediate point S1 on the set movement route L1 until the tip side reaches a predetermined depth. The pin F3 is lowered and gradually pushed into the sealing body 3. Then, while bringing the outer peripheral surface of the base end side pin F2 into contact with the surface 3a of the sealing body 3, the outer peripheral surface of the tip end side pin F3 is slightly brought into contact with the step side surface 17b of the strut step portion 17, and the tip end side pin The rotation tool F is moved counterclockwise with respect to the protruding portion 16 in a state where the flat surface F4 of F3 is not in contact with the step bottom surface 17a. A plasticized region W1 is formed on the movement locus of the rotation tool F by hardening the frictionally agitated metal.

As shown in FIG. 13, when the rotation tool F is made to go around the protrusion 16 along the set movement route L1, the rotation tool F is moved to the end position EP set on the set movement route L1 and the intermediate point S2. The tip side pin F3 is gradually pulled out from the sealing body 3 and the rotating tool F is separated from the sealing body 3 at the end position EP. As shown in FIG. 14, the end position EP may be set on the side further away from the support column 15 than the set movement route L1 (that is, outside the set movement route L1). Even in that case, after the rotation tool F is made to go around the protrusion 16 along the set movement route L1, the rotation tool F is moved to the end position EP set outside the set movement route L1 from the intermediate point S2. The tip side pin F3 is raised and gradually pulled out from the sealing body 3, and the rotating tool F is separated from the sealing body 3 at the end position EP.

The joining method according to the present embodiment described above can also achieve substantially the same effect as that of the first embodiment.
For example, in the closet section of the main joining process shown in FIGS. 13 and 14, the tip side pin F3 is gradually pushed in until the predetermined depth is reached while moving the rotation tool F to a position overlapping the set movement route L1. , It is possible to prevent the frictional heat from becoming excessive on the set movement route L1.

Further, in the detachment section of the main joining step shown in FIG. 13, the frictional heat becomes excessive at one point of the set movement route L1 by gradually pulling out the tip side pin F3 while moving the rotation tool F on the set movement route L1. It can be prevented from becoming.
Further, in the detachment section of the main joining step shown in FIG. 14, frictional heat is generated on the set movement route L1 by gradually pulling out the tip side pin F3 while moving the rotation tool F from a position overlapping the set movement route L1. It can be prevented from becoming excessive.

As a result, it is possible to prevent the first aluminum alloy of the support column 15 from being mixed into the sealing body (member) 3 side on the set movement route L1.

[Modification example]
Next, the joining method according to the modified example of the present invention will be described. In the modified example, as shown in FIG. 15, the materials of the jacket body 2 and the sealing body 3 are different in the preparation step, and the form of the main joining step is different from the first embodiment and the second embodiment. In the preparation step of the modification, the jacket body 2 is formed of copper or a copper alloy. In the modified example, the jacket body 2 made of copper or a copper alloy and the sealing body (member) 3 made of aluminum or an aluminum alloy are illustrated. It may be joined with a member made of aluminum or an aluminum alloy to be joined.

In the main joining step of the modified example, as shown in FIG. 15, the jacket body 2 and the sealing body 3 are friction-stir welded using the rotary tool F. In this joining step, friction stir welding is performed by circling around the protruding portion 16 in a state where the outer peripheral surface of the tip side pin F3 is not in contact with the step side surface 17b of the column step 17. In this embodiment, the tip of the tip side pin F3 is set so as not to come into contact with the step bottom surface 17a.

If the distance from the step side surface 17b to the outer peripheral surface of the tip end side pin F3 is too long, the joint strength of the first butt portion J1 decreases. The separation distance L from the step side surface 17b to the outer peripheral surface of the tip end side pin F3 may be appropriately set depending on the material of the step side surface 17b and the sealing body 3. When the outer peripheral surface of the tip side pin F3 is not brought into contact with the step side surface 17b and the flat surface F4 is not brought into contact with the step bottom surface 17a as in the present embodiment, for example, 0 ≦ L ≦ 0.5 mm is set. It is preferable to set 0 ≦ L ≦ 0.3 mm. The start position SP, end position EP, and intermediate points S1 and S2 in the modified example are set in the same manner as in the first embodiment or the second embodiment.

According to the modification described above, the tip side pin F3 of the rotation tool F and the step side surface 17b of the support column step portion 17 are not in contact with each other. However, due to the frictional heat between the sealing body 3 and the tip side pin F3, the aluminum alloy mainly on the sealing body 3 side of the first butt portion J1 is agitated and plastically fluidized, and the first butt portion J1 and the step side surface 17b The hole wall 4a of the hole 4 can be joined. Further, since the tip side pin F3 is brought into contact with only the sealing body 3 to perform friction stir welding, copper or a copper alloy is hardly mixed into the sealing body 3 from the support column 15. As a result, in the first butt portion J1, the aluminum alloy on the sealing body 3 side is mainly frictionally agitated, so that a decrease in joint strength can be suppressed.

Further, in the closet section of the main joining process, the rotary tool F is moved on the set movement route L1 and the tip side pin F3 is gradually pushed in until it reaches a predetermined depth, so that frictional heat is generated at one point of the set movement route L1. Can be prevented from becoming excessive.
Further, in the closet section of the main joining process, the rotation tool F is moved to a position overlapping the set movement route L1 and the tip side pin F3 is gradually pushed in until the depth reaches a predetermined depth, so that the rotation tool F is gradually pushed on the set movement route L1. It is possible to prevent the frictional heat from becoming excessive.

Further, in the detachment section of the main joining process, the frictional heat is prevented from becoming excessive at one point of the set movement route L1 by gradually pulling out the tip side pin F3 while moving the rotation tool F on the set movement route L1. be able to.
Further, in the detachment section of the main joining process, the frictional heat becomes excessive on the set movement route L1 by gradually pulling out the tip side pin F3 while moving the rotation tool F from the position overlapping with the set movement route L1. Can be prevented.

As a result, it is possible to prevent the copper or the copper alloy of the support column 15 from being mixed into the sealing body (member) 3 side on the set movement route L1.

Further, also in the second butt portion J2, the tip side pin F3 is not brought into contact with the step bottom surface 17a, but since the plasticized region W1 reaches the step bottom surface 17a, the joint strength of the second butt portion J2 can be increased. Further, also in the second butt portion J2, since the tip end side pin F3 is not in contact with the step bottom surface 17a, copper or copper alloy is hardly mixed from the support column 15 into the sealing body 3. As a result, the aluminum alloy on the sealing body 3 side is mainly frictionally agitated also in the second butt portion J2, so that a decrease in joint strength can be suppressed.

Similar to the above embodiment, in the present modification, the rotation tool F includes a proximal end side pin F2 and a distal end side pin F3 having a taper angle smaller than the taper angle A of the proximal end side pin F2. This makes it easier to insert the rotation tool F into the sealant 3. Further, since the taper angle B of the tip side pin F3 is small, the rotation tool F can be easily inserted to a deep position of the sealing body 3.

Further, in this modification, a gap having a V-shaped cross section is formed in the first butt portion J1, but by making the plate thickness of the sealing body 3 larger than that of the step side surface 17b, the joint portion (in the main joining step) It is possible to prevent a metal shortage in the plasticized region W1).

Further, in this joining step, the inclination angle γ of the step side surface 17b (FIG. 7) and the inclination angle α of the tip side pin F3 (FIG. 1) are the same (the step side surface 17b and the outer peripheral surface of the tip side pin F3 are parallel to each other). ), So that the tip side pin F3 and the step side surface 17b can be brought as close as possible while avoiding contact between the tip side pin F3 and the step side surface 17b.

The plate thickness of the sealing body 3 may be set to be the same as the height dimension of the protruding portion 16.

3 Sealed body (member)
4 Hole 4a Hole wall 15 Strut 17 Strut Step 17a Step bottom 17b Step side J1 First butt J2 Second butt F Rotation tool F2 Base end side pin F3 Tip side pin F21 Pin step part A Taper angle B Taper angle L1 setting movement route SP start position EP end position

Claims (15)

It is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by friction stir welding.
The strut is formed of a first aluminum alloy, the member is made of a second aluminum alloy, and the first aluminum alloy is a material having a higher hardness than the second aluminum alloy.
The rotary tool used for friction stir welding includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and the outer peripheral surface of the base end side pin has a taper angle. A stepped pin step is formed,
A preparatory step for forming a strut step portion having a step bottom surface at the tip of the strut and a step side surface that rises diagonally from the step bottom surface so that the tip of the strut is tapered.
A mounting step of forming a first butt portion so that there is a gap when the step side surface of the support step portion and the hole wall of the hole portion are abutted by mounting the member on the support column.
The rotating tip end side pin is inserted into the member, and the outer peripheral surface of the tip end side pin is slightly in contact with the step side surface of the support column step portion while the outer peripheral surface of the base end side pin is in contact with the surface of the member. In this state, when the rotation tool is moved along the set movement route set on the surface of the member, the second aluminum alloy of the member is allowed to flow into the gap and is rubbed against the first butt portion. Including the main joining step of stirring,
In the main joining step, the tip side pin that rotates from the start position set on the set movement route is inserted, and the tip side pin is gradually pushed in until it reaches a predetermined depth while moving in the traveling direction. Characterized joining method. It is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by friction stir welding.
The strut is formed of a first aluminum alloy, the member is made of a second aluminum alloy, and the first aluminum alloy is a material having a higher hardness than the second aluminum alloy.
The rotary tool used for friction stir welding includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and the outer peripheral surface of the base end side pin has a taper angle. A stepped pin step is formed,
A preparatory step for forming a strut step portion having a step bottom surface at the tip of the strut and a step side surface that rises diagonally from the step bottom surface so that the tip of the strut is tapered.
A mounting step of forming a first butt portion so that there is a gap when the step side surface of the support step portion and the hole wall of the hole portion are abutted by mounting the member on the support column.
The rotating tip end side pin is inserted into the member, and the outer peripheral surface of the tip end side pin is slightly in contact with the step side surface of the support column step portion while the outer peripheral surface of the base end side pin is in contact with the surface of the member. In this state, when the rotation tool is moved along the set movement route set on the surface of the member, the second aluminum alloy of the member is allowed to flow into the gap and is rubbed against the first butt portion. Including the main joining step of stirring,
In the main joining step, after the rotating tip side pin is inserted at a start position set on a side further away from the support column than the set movement route, the rotation center axis of the rotation tool overlaps with the set movement route. A joining method characterized in that the tip side pin is gradually pushed in until a predetermined depth is reached while moving the pin to a predetermined position. It is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by friction stir welding.
The strut is formed of a first aluminum alloy, the member is made of a second aluminum alloy, and the first aluminum alloy is a material having a higher hardness than the second aluminum alloy.
The rotary tool used for friction stir welding includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and the outer peripheral surface of the base end side pin has a taper angle. A stepped pin step is formed,
A preparatory step for forming a strut step portion having a step bottom surface at the tip of the strut and a step side surface that rises diagonally from the step bottom surface so that the tip of the strut is tapered.
A mounting step of forming a first butt portion so that there is a gap when the step side surface of the support step portion and the hole wall of the hole portion are abutted by mounting the member on the support column.
The rotating tip end side pin is inserted into the member, and the outer peripheral surface of the tip end side pin is slightly in contact with the step side surface of the support column step portion while the outer peripheral surface of the base end side pin is in contact with the surface of the member. In this state, when the rotation tool is moved along the set movement route set on the surface of the member, the second aluminum alloy of the member is allowed to flow into the gap and is rubbed against the first butt portion. Including the main joining step of stirring,
In the main joining step, the end position is set on the set movement route, and after frictional stirring with respect to the first butt portion, the tip side pin is gradually pulled out while moving the rotation tool to the end position. A joining method characterized in that the rotating tool is separated from the member at the end position. It is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by friction stir welding.
The strut is formed of a first aluminum alloy, the member is made of a second aluminum alloy, and the first aluminum alloy is a material having a higher hardness than the second aluminum alloy.
The rotary tool used for friction stir welding includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and the outer peripheral surface of the base end side pin has a taper angle. A stepped pin step is formed,
A preparatory step for forming a strut step portion having a step bottom surface at the tip of the strut and a step side surface that rises diagonally from the step bottom surface so that the tip of the strut is tapered.
A mounting step of forming a first butt portion so that there is a gap when the step side surface of the support step portion and the hole wall of the hole portion are abutted by mounting the member on the support column.
The rotating tip end side pin is inserted into the member, and the outer peripheral surface of the tip end side pin is slightly in contact with the step side surface of the support column step portion while the outer peripheral surface of the base end side pin is in contact with the surface of the member. In this state, when the rotation tool is moved along the set movement route set on the surface of the member, the second aluminum alloy of the member is allowed to flow into the gap and is rubbed against the first butt portion. Including the main joining step of stirring,
In the main joining step, the end position is set on the side further away from the support column from the set movement route, and after frictional agitation with respect to the first butt portion, the tip is moved to the end position while moving the rotation tool to the end position. A joining method comprising gradually pulling out a side pin to separate the rotating tool from the member at the end position. In the above-described setting step, the step bottom surface of the support column step portion and the back surface of the member are overlapped to form a second butt portion.
The main joining step is characterized in that the rotary tool is moved along the second butt portion to perform friction stir welding in a state where the tip side pin is slightly in contact with the step bottom surface of the support column step portion. The joining method according to any one of claims 1 to 4. The method according to any one of claims 1 to 5, wherein in the preparatory step, the thickness of the member is set to be larger than the height dimension of the step side surface of the support column step portion. Joining method. The present joining step according to any one of claims 1 to 6, wherein the traveling direction and the rotating direction of the rotating tool are set so that the advancing side of the rotating tool is the support column side. The joining method described. It is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by friction stir welding.
The strut is made of copper or a copper alloy, and the member is made of aluminum or an aluminum alloy.
The rotary tool used for friction stir welding includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and the outer peripheral surface of the base end side pin has a taper angle. A stepped pin step is formed,
A preparatory step for forming a strut step portion having a step bottom surface at the tip of the strut and a step side surface that rises diagonally from the step bottom surface so that the tip of the strut is tapered.
A mounting step of forming a first butt portion so that there is a gap when the step side surface of the support step portion and the hole wall of the hole portion are abutted by mounting the member on the support column.
A state in which the rotating tip end side pin is inserted into the member, the outer peripheral surface of the base end side pin is in contact with the surface of the member, and the outer peripheral surface of the tip end side pin is not in contact with the step side surface of the support column step portion. Then, when the rotary tool is moved along the set movement route set on the surface of the member, the aluminum or aluminum alloy of the member is allowed to flow into the gap while friction stir welding is performed on the first butt portion. Including this joining process
In the main joining step, the tip side pin that rotates from the start position set on the set movement route is inserted, and the tip side pin is gradually pushed in until it reaches a predetermined depth while moving in the traveling direction. Characterized joining method. It is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by friction stir welding.
The strut is made of copper or a copper alloy, and the member is made of aluminum or an aluminum alloy.
The rotary tool used for friction stir welding includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and the outer peripheral surface of the base end side pin has a taper angle. A stepped pin step is formed,
A preparatory step for forming a strut step portion having a step bottom surface at the tip of the strut and a step side surface that rises diagonally from the step bottom surface so that the tip of the strut is tapered.
A mounting step of forming a first butt portion so that there is a gap when the step side surface of the support step portion and the hole wall of the hole portion are abutted by mounting the member on the support column.
A state in which the rotating tip end side pin is inserted into the member, the outer peripheral surface of the base end side pin is in contact with the surface of the member, and the outer peripheral surface of the tip end side pin is not in contact with the step side surface of the support column step portion. Then, when the rotary tool is moved along the set movement route set on the surface of the member, the aluminum or aluminum alloy of the member is allowed to flow into the gap while friction stir welding is performed on the first butt portion. Including this joining process
In the main joining step, after the rotating tip side pin is inserted at a start position set on a side further away from the support column than the set movement route, the rotation center axis of the rotation tool overlaps with the set movement route. A joining method characterized in that the tip side pin is gradually pushed in until a predetermined depth is reached while moving the pin to a predetermined position. It is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by friction stir welding.
The strut is made of copper or a copper alloy, and the member is made of aluminum or an aluminum alloy.
The rotary tool used for friction stir welding includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and the outer peripheral surface of the base end side pin has a taper angle. A stepped pin step is formed,
A preparatory step for forming a strut step portion having a step bottom surface at the tip of the strut and a step side surface that rises diagonally from the step bottom surface so that the tip of the strut is tapered.
A mounting step of forming a first butt portion so that there is a gap when the step side surface of the support step portion and the hole wall of the hole portion are abutted by mounting the member on the support column.
A state in which the rotating tip end side pin is inserted into the member, the outer peripheral surface of the base end side pin is in contact with the surface of the member, and the outer peripheral surface of the tip end side pin is not in contact with the step side surface of the support column step portion. Then, when the rotary tool is moved along the set movement route set on the surface of the member, the aluminum or aluminum alloy of the member is allowed to flow into the gap while friction stir welding is performed on the first butt portion. Including this joining process
In the main joining step, the end position is set on the set movement route, and after frictional stirring with respect to the first butt portion, the tip side pin is gradually pulled out while moving the rotation tool to the end position. A joining method characterized in that the rotating tool is separated from the member at the end position. It is a joining method in which a support column and a member having a hole into which the tip of the support column is inserted are joined by friction stir welding.
The strut is made of copper or a copper alloy, and the member is made of aluminum or an aluminum alloy.
The rotary tool used for friction stir welding includes a base end side pin and a tip end side pin, and the taper angle of the base end side pin is larger than the taper angle of the tip end side pin, and the outer peripheral surface of the base end side pin has a taper angle. A stepped pin step is formed,
A preparatory step for forming a strut step portion having a step bottom surface at the tip of the strut and a step side surface that rises diagonally from the step bottom surface so that the tip of the strut is tapered.
A mounting step of forming a first butt portion so that there is a gap when the step side surface of the support step portion and the hole wall of the hole portion are abutted by mounting the member on the support column.
A state in which the rotating tip end side pin is inserted into the member, the outer peripheral surface of the base end side pin is in contact with the surface of the member, and the outer peripheral surface of the tip end side pin is not in contact with the step side surface of the support column step portion. Then, when the rotary tool is moved along the set movement route set on the surface of the member, the aluminum or aluminum alloy of the member is allowed to flow into the gap while friction stir welding is performed on the first butt portion. Including this joining process
In the main joining step, the end position is set on the side further away from the support column from the set movement route, and after frictional agitation with respect to the first butt portion, the tip is moved to the end position while moving the rotation tool to the end position. A joining method comprising gradually pulling out a side pin to separate the rotating tool from the member at the end position. In the above-described setting step, the step bottom surface of the support column step portion and the back surface of the member are overlapped to form a second butt portion.
The present claim is characterized in that the rotary tool is moved along the second butt portion to perform friction stir welding in a state where the tip end side pin is not brought into contact with the step bottom surface of the support column step portion. 8. The joining method according to any one of claims 11. The method according to any one of claims 8 to 12, wherein in the preparatory step, the thickness of the member is set to be larger than the height dimension of the step side surface of the support column step portion. Joining method. The present joining step according to any one of claims 8 to 13, wherein the traveling direction and the rotating direction of the rotating tool are set so that the advancing side of the rotating tool is the support column side. The joining method described. The present joining step according to any one of claims 1 to 14, wherein the rotating tool is moved along the first butt portion and is made to go around the support column to perform friction stir welding. The described joining method.

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