KR101149238B1 - Joining method - Google Patents

Abstract

The joining method which concerns on this invention is a joining method which performs friction stirring by moving the rotation tool G with respect to the to-be-joined metal member 1 which the 1st metal member 1a and the 2nd metal member 1b joined, 1st main joining process which performs friction stir from the surface A side of the to-be-joined metal member 1 with respect to the butt | matching part J1 of the 1st metal member 1a and the 2nd metal member 1b, and a back surface ( 2nd bone joining process which performs friction stirring from B) side, the 3rd bone joining process which performs friction stirring from one side surface side (C), and the 4th bone which performs friction stirring from the other side surface side (D) Including a bonding step, the superposition of the surface-side plasticization region (W1) and the back-side plasticization region (W2), the first side-side plasticization region (W3) and the second side-side plasticization region (W4) It features.

Description

Joining method {JOINING METHOD}

The present invention relates to a joining method of a metal member using friction stirring.

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 rotation tool to protrude and provide a stirring pin (probe) in the lower end surface of the shoulder part which shows a cylinder shape.

29 and 30 are perspective views showing a conventional bonding method in which friction stir welding is performed on a pair of metal members. As shown in FIG. 29, 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 performing this, friction agitation may also be performed from the back surface 103 side.

That is, the conventional joining method performs friction agitation from both sides of the surface 102 and the back surface 103 along the abutting portion 104 (two dashed and dashed lines) of the metal members 101 and 101, and is formed by friction stirring. It joins so that the center part of the thickness direction of the torch region 105 and 106 may contact. Thereby, in the butt | matching part 104, it can join without a gap. Such a joining method is disclosed in Document 1 below.

[Patent Document 1] Japanese Patent Application Laid-Open No. 2005-131666 (see Fig. 7).

However, as shown in FIG. 30, when the thickness of the metal members 111 and 111 to be joined is large, the abutting part 104 (two dashed-dotted line) is carried out even if friction stirring is performed from the surface 102 and the back surface 103. FIG. There is a possibility that an unbonded portion may occur in the center of the c). That is, even when the thickness of the metal member 111 is very large compared with 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 (unbonded part) 119 will generate | occur | produce in the center part of the butt | matching part 104. FIG. Thus, when the clearance gap 119 which continues from one side surface 107 to the other side surface 108 generate | occur | produces, the problem that the watertightness and airtightness between the side surface 107 and the side surface 108 fall. There was.

In this case, when the length of the stirring pin of the rotary tool is increased in accordance with the thickness of the metal member 111, the metal members 111 can be joined without a gap by performing friction stirring from the front surface 102 and the back surface 103. Do. However, since the rotating tool moves while embedding the stirring pin in the metal member 111 and rotates at a 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 short life.

In addition, as shown in FIG. 29 and FIG. 30, in the plasticization regions 105 and 106, there is a possibility that a continuous cavity defect 109 occurs from one side surface 107 to the other side surface 108. have. Such a cavity defect 109 was one cause of deteriorating the watertightness and airtightness between the side surfaces 107 and side surfaces 108 of the metal members 101 and 111.

In view of the above, an object of the present invention is to provide a joining method capable of improving the airtightness and watertightness between both side surfaces of a metal member while frictionally agitating the abutment portions of the metal members from the front and back sides of the metal member. do.

The joining method which concerns on this subject is a joining method which performs friction stirring by moving a rotating tool with respect to the to-be-joined metal member which the 1st metal member and the 2nd metal member joined, The said 1st metal member And a first main joining step of performing friction stir from the surface side of the metal member to be joined to the butt portion of the second metal member, and a friction stir from the back surface side of the metal member to be joined to the butt portion. And a plasticized region formed in the first bone bonding step and the second bone bonding step, including a two-bone bonding step and a side-bone bonding step for performing friction stir from the side surface of the metal member to be joined to the butt portion. And overlapping the plasticized region formed in the side-bone bonding process.

According to this joining method, since friction stir is performed from the front side and the back side of the joined metal member to the butt portion, friction stir is performed from the side surface of the metal member to be joined to overlap the plasticized region. However, there is no continuous gap between the sides. Thereby, the airtightness and watertightness between both side surfaces can be improved.

Moreover, the said side bone joining process is the 3rd bone joining process which performs friction stirring from one side surface side of the said to-be-joined metal member, and the 4th bone joining which performs friction stirring from the other side surface side of the said to-be-joined metal member. It is preferable to include a process.

According to such a joining method, friction stir is performed from both side surfaces of the metal member to be joined to the butt portion, whereby the airtightness and water tightness can be increased more reliably.

In addition, when the rotation direction of the said rotation tool in the said 1st-4th bonding process is the same direction, the starting position of the friction stirring in the said 2nd bone bonding process is a said 1st bone bonding process. It is set to the end position side of friction stirring, and the starting position of friction stirring in a said 3rd main joining process is the start position side of friction stirring in a said 1st main joining process, and the said 2nd main joining process. The start position of the friction stirring in the fourth main joining step is set to either of the start position of the friction stir, and the start position of the friction stirring in the first main joining step and the second main joining step. It is preferable to set to the other side of the starting position side of the friction stirring in.

Here, the cavity defects which may occur when the friction stirring is performed are formed on the left side in the advancing direction when the rotary tool is in the right turn, and are formed on the right side in the advancing direction in the case of the left turn, but the third bonding process and the fourth By setting the start position of the bonding step to the above-described position, even if continuous cavity defects occur between the side surfaces, the cavity defects can be reliably segmented. Thereby, the airtightness and watertightness between both side surfaces can be improved. Moreover, since the rotation direction of a rotation tool is set to the same direction, it is not necessary to change the rotation direction of a rotation tool every time each bone bonding process is performed, and workability can be improved.

Further, in the first main bonding step, the rotation tool is rotated to the right, and the start position and the end position of the friction stirring are set so that the first metal member is located on the right side in the traveling direction of the rotation tool, and the second In the present bonding step, when the starting position and the end position of the friction stirring are set so that the first metal member is positioned on the left side of the rotation direction of the rotating tool while the rotating tool is rotated to the left, the third main bonding step and In a 4th present joining process, when the said rotation tool rotates right, the start position and end position of friction stirring are set so that the said 1st metal member may be located to the left of the advancing direction of the said rotation tool, and when said rotation tool rotates left, the said It is preferable to set the start position and end position of friction stirring so that the said 1st metal member is located to the right of the advancing direction of a rotating tool.

Further, in the first main joining step, the rotation tool is rotated to the left and the start position and end position of the friction stirring are set so that the first metal member is located on the right side in the advancing direction of the rotation tool, and the second In the present bonding step, when the starting position and the end position of friction stirring are set so that the first metal member is located on the left side in the advancing direction of the rotating tool, the third main bonding step and The fourth main joining step sets the start position and end position of the friction stir so that the first metal member is positioned on the right side in the advancing direction of the rotation tool when the rotation tool is rotated to the right, and the rotation when the rotation tool is rotated to the left. It is preferable to set the start position and end position of friction stirring so that the said 1st metal member is located to the left of the advancing direction of a tool.

According to such a joining method, even if continuous cavity defects generate | occur | produce, for example between side surfaces, in the plasticization area | region formed in the 1st main joining process and the 2nd main joining process, this cavity defect can be reliably segmented. Thereby, the airtightness and watertightness between both sides can be improved.

Moreover, it is preferable to perform the temporary joining process of temporarily joining the said butt part, before performing the at least one main joining process of the said 1st bone joining process, the said 2nd bone joining process, and the said side bone joining process.

When performing the first to fourth main joining steps, the rotary tool is press-fitted to the butt portion of the first metal member and the second metal member, so that a force to separate the first metal member and the second metal member acts, Opening may occur in the butt portion. However, according to such a joining method, before performing a 1st-4th main joining process, the 1st-4th main joining process can be performed suitably by temporarily joining the butt part.

Moreover, it is preferable to include the preliminary process of arrange | positioning a pair of tab material on both sides of the said butt | matching part, and performing friction stirring preliminarily to the butt | matching part of the said tab material and the to-be-joined metal member.

According to such a joining process, by using a tab material, the provisional joining process and the present joining process can be bonded together quickly and cleanly on the finished surface.

In addition, it is preferable to form a prepared hole in the insertion position of the rotary tool in advance. According to such a joining method, the insertion resistance generated when the rotary tool is press-fitted into the insertion scheduled position can be reduced, and the rotary tool is guided to the spare hole, so that the friction stirring can be performed quickly with high precision.

Moreover, it is preferable that the extension distance of the plasticization area | region formed in the said side bone bonding process is larger than the thickness dimension of the said butt part. According to such a joining method, since the extension distance of the plasticization area | region formed in the side surface of a to-be-joined metal member can be ensured longer than the thickness dimension of a to-be-joined metal member, the stress acting on a joining part can be disperse | distributed. Thereby, the joining strength of a joining part can be raised.

Moreover, the said side bone joining process performs friction stirring over the full length of the said butt part shown in the side surface of the said to-be-joined metal member, and the plasticization area | region formed in the said side bone joining process, the said 1st bone joining process, and the said 1st 2 It is preferable to overlap the plasticization area | region formed in this joining process. According to this joining method, the airtightness and watertightness of the to-be-joined metal member can be improved more.

Moreover, in this invention, it is preferable that the planar linearity of the said butt part shown to the side surface of the said to-be-joined metal member is a straight line or a combination of straight lines. According to such a joining method, although the curve may be included with respect to the planar linearity of a butt | matching part, if a straight line or a combination of straight lines is formed, shaping | molding of abutment surface becomes easy and it becomes possible to omit the labor of processing.

Further, in the present invention, one or more refractive points may be formed in the planar linearity of the butt portion, and the angle at which the lines (butt surfaces) intersect at this refractive point may be 90 degrees. According to this joining method, since the rotary tool moving along the planar linearity of the butt part at the time of joining the friction stir stops at the refraction point, the frictional stirring is performed longer than the other part at the refraction point. Therefore, at the refraction point, by performing friction stirring for a long time, processing can be performed without the occurrence of a bonding defect, so that a continuous bonding defect does not occur along the bonding portion, and thus the airtightness and water tightness in the bonding portion Is improved.

According to the joining method according to the present invention, the abutting portions of the metal members can be subjected to friction stirring from the front side and the back side of the metal member, and the airtightness and the watertightness between the two side surfaces of the 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).
2 is a view showing a first preparation step according to the first embodiment, (a) is a perspective view, and (b) is a plan view.
3 is a diagram showing a first preparation step according to the first embodiment, (a) is a cross-sectional view taken along the line II of FIG. 2 (b), and (b) is a cross-sectional view taken along the line II-II of FIG. to be.
It is a figure which shows the rotation tool which concerns on 1st Embodiment, (a) is a side view of the temporary welding rotation tool, (b) is a side view of this rotation tool for joining.
It is a figure which shows the use condition of the provisional welding rotation tool which concerns on 1st Embodiment, (a) is a figure which made the temporary welding rotation tool contact a 2nd tab material, (b) is the rotation for provisional welding. 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 joining process which concerns on 1st Embodiment in the arrow direction III-III of FIG. 6, (a) is a start position, (b) is an intermediate position, (c) is an end position of FIG. It is a figure which shows friction stirring.
8: (a) is sectional drawing which looks at the 1st metal member 1a side from the butt | matching part J1 after the reinstallation process of the 2nd preparation process which concerns on 1st Embodiment. FIG. 8B is a plan view illustrating a first tab material bonding step, a temporary bonding step, and a 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, wherein (a) is a starting position and (b) is a frictional stirring at an intermediate position. Drawing.
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 illustrating a third preparation step according to the first embodiment.
12 is a perspective view illustrating a third main bonding step according to the first embodiment.
It is sectional drawing of the VV line of FIG. 12 which shows after the 3rd main bonding process which concerns on 1st Embodiment.
14: (a) is sectional drawing which faces the 2nd metal member 1b side from the butt | matching part J1 after the reinstallation process of the 4th preparation process which concerns on 1st Embodiment. FIG. 14B is a diagram illustrating a fourth main bonding step according to the first embodiment, and is a cross-sectional view facing the second metal member 1b side from the butt portion J1.
It is a figure which shows the bonding method which concerns on 2nd Embodiment, (a) is a perspective view, (b) is an enlarged perspective view in the H part.
It is a figure which shows the bonding method which concerns on 3rd embodiment, (a) is a perspective view, (b) is an enlarged perspective view in the part I. FIG.
It is a perspective view which shows the to-be-joined metal member which concerns on 4th Embodiment.
It is a figure which shows the to-be-joined metal member which concerns on 4th Embodiment, (a) is an exploded perspective view, (b) is a side view.
It is a perspective view which shows the tab material arrangement process which concerns on 4th Embodiment.
It is a top view which shows the temporary bonding process which concerns on 4th Embodiment.
It is a top view which shows the 1st main bonding process which concerns on 4th Embodiment.
It is a top view which shows the 2nd provisional bonding process which concerns on 4th Embodiment, and the 2nd main bonding process.
It is a top view which shows the 3rd preliminary process which concerns on 4th Embodiment.
24 is a plan view illustrating a third main bonding step according to the fourth embodiment.
25 is a plan view illustrating a fourth preliminary step and a fourth main bonding step according to the fourth embodiment.
Fig. 26 is a plan view of a first side surface C of the metal member to be joined showing a modification according to the embodiment of the present invention, (a) is a first modification, (b) is a second modification, and (c) ) Shows a third modification.
27 is a plan view of a first side surface C of the metal member to be joined, showing a modification example of the embodiment of the present invention, (a) is a fourth modification, (b) is a fifth modification, and (c) ) Shows a sixth modification, and (d) shows a seventh modification.
28 is a plan view of a first side surface C of the metal member to be joined, showing a modification example according to the embodiment of the present invention, and shows an eighth modification example.
29 is a perspective view showing a conventional bonding method.
30 is a perspective view showing a conventional bonding method.

[First Embodiment]

In the joining method according to the present invention, as shown in FIG. 1, four outer peripheral sides of the joined metal member 1 formed by abutting the first metal member 1a and the second metal member 1b are joined by friction stirring. When doing this, each of the rotation direction and the advancing direction of this bonding rotation tool G is set suitably, It is characterized by the above-mentioned.

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 and 2nd tab material used when joining this to-be-joined metal member 1 are demonstrated in detail. .

As shown in FIG. 2, the to-be-joined metal member 1 consists of the 1st metal member 1a and the 2nd metal member 1b which are rectangular in cross section in this embodiment, and match each end surface. Thus, the butting part J1 is formed. 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 is the back surface B, one side is the 1st side C, and the other side is 2nd. Let side (D) be. In addition, the top, bottom, left, and right back and forth in this embodiment follow the arrow of FIG.

As shown in FIGS. 2A and 2B, the first tab member 2 and the second tab member 3 sandwich the butt portion J1 of the metal member 1 to be joined. It is arrange | positioned so that it may be provided in the to-be-joined metal member 1, respectively, and the joint 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 ( Cover the border). 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 forms 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 fitting portion J1 is determined by the thickness thereof. 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 used for this joining process) , "The rotation tool G for this joining") is explained in full detail.

Rotational tool F for temporary joining shown in FIG.4 (a) consists of a metal material harder than the to-be-joined metal member 1, such as tool steel, and shows the shoulder part F1 which shows a cylindrical shape, and this shoulder part It is comprised and equipped with the stirring pin (probe) F2 protruded by the lower end surface F11 of (F1). The size and shape of the temporary welding rotary tool F may be set in accordance with the material, thickness, and the like of the metal member 1 to be joined, but at least the first rotary welding tool G used in the first main bonding step described later [ See FIG. 4 (b)]. In this case, provisional joining can be performed with a load smaller than that of the present joining, so that the load applied to the friction stir device during provisional joining can be reduced, and the moving speed (feeding) of the rotational joining tool F for provisional joining can be reduced. Speed) can be made faster than the moving speed of the joining rotary tool G, so that the work 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 surroundings by pressing plastic 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 descend | falls perpendicularly from the center of the lower end surface F11 of the shoulder part F1, and is shape | molded in the shape of the truncated cone in this embodiment. Moreover, the stirring blade which carved in spiral shape is formed in the peripheral 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 the tool (G) for the (X ₂₎ is the joint in this embodiment (the upper end diameter ) Is smaller than Y ₂ , and the minimum outer diameter (lower end diameter) X ₃ is 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) is preferably smaller than the length of the stirring pins (G2) of the rotating tool (G) for the joint (L ₁₎ [in Fig. 4 (b) reference.

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 part It is comprised and equipped with the stirring pin (probe) G2 protruding to the lower end surface G11 of (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 descend | falls perpendicularly from the center of the lower end surface G11 of the shoulder part G1, and is shape | molded in the shape of the truncated cone in this embodiment. Moreover, the stirring blade which carved in spiral 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 bonding process, (7) tap material cutting process, (8) 3rd preparation process, (9) 3rd preliminary process, (10) 3rd main bonding process, (11) 4th preparation process, ( 12) 4th preliminary process, (13) 4th main joining process, and (14) tab material cutting process.

In addition, as shown in FIG. 1, (2) 1st preliminary process and (3) 1st main joining process are processes performed from the surface A side, (5) 2nd preliminary process, and (6) agent 2 This bonding process is a process performed from the back surface B side, (9) 3rd preliminary process and (10) 3rd this bonding process is a process performed from the 1st side surface C side, (12) agent 4th preliminary process and (13) 4th This joining process is a process performed from the 2nd side surface D side. In this embodiment, all the rotational directions of the temporary welding rotation tool F and this bonding rotation tool G shall perform right rotation. In this way, work effort can be omitted by unifying the rotational directions of the temporary joining rotary tool F and the main joining rotary tool G. FIG.

(1) 1st preparation process

A first preparation process will be described with reference to FIGS. 2 and 3. The 1st preparation process is a process of preparing the attachment member (1st tap material 2 and 2nd tap material 3) in which the start position and end position of friction stirring in a 1st and 2nd main joining process are provided. In the present embodiment, the first preparation step includes the (1-1) butt step of bringing the first metal member 1a and the second metal member 1b together, and the butt portion J1 of the metal member 1 to be joined. (1-2) A tab member placement step of arranging the first tab member 2 and the second tab member 3 on both sides of the < RTI ID = 0.0 >) < / RTI > and the first tab member 2 and the second tab member 3 by welding. (1-3) welding process of temporary welding to the member 1, and (1-4) installation process of installing the to-be-joined metal member 1 in the mount of a friction stirring apparatus not shown.

(1-1) Butt Process

2 and 3, 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. Moreover, the surface 12a of the 1st metal member 1a and the surface 12b of the 2nd metal member 1b are located in the same plane, and the back surface 13a and 2nd of the 1st metal member 1a are also located. The back surface 13b of the metal member 1b is located in the same plane. Similarly, the first side face 14a of the first metal member 1a and the first side face 14b of the second metal member 1b are located in the same plane, and the second side face of the first metal member 1a is positioned. 15a and the second side surface 15b of the second metal member 1b are positioned in the same plane.

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 material arrangement step, as shown in FIG. 2B, the first tab material 2 is disposed on the first side C side of the butt portion J1, and the contact surface 21 is disposed on the first side surface ( C). Moreover, the 2nd tab material 3 is arrange | positioned at the 2nd side surface D of the butt | matching part J1, and the contact surface 31 is made to contact 2nd side surface D. As shown in FIG. 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. And the back surface 23 of the first tab member 2 and the back surface 33 of the second tab member 3 are located on the same plane as the back surface B of the metal member 1 to be joined. .

(1-3) welding process

In the welding step, as shown in FIGS. 2A and 2B, the inner corner portions 2a and 2b formed by the joined metal member 1 and the first tab member 2 are welded. The temporary joined metal member 1 and the first tab member 2 are temporarily joined. In addition, the inner corner portions 3a and 3b formed by the joined metal member 1 and the second tab member 3 are welded to temporarily join the joined metal member 1 and the second tab member 3. In addition, welding may be performed continuously over the entire length of the inner corner portions 2a, 2b, and 3a, 3b, or may be interrupted and welded.

(1-4) Installation Process

In an installation process, the to-be-joined metal member 1 by which the 1st tap material 2 and the 2nd tap material 3 were welded was mounted to the mount of the friction stirring apparatus which is not shown in figure, and it is immovable using a clamp, for example. Redeem. The friction stirring device according to the present embodiment is an apparatus set to perform friction stirring from above the metal member 1 to be joined.

In the case of omitting the welding step in the first preparation step, the butt step and the tab material arrangement step may be performed on the mount of the friction stirring device (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 in the surface A side. ) (2-1) Second tap material joining process of joining), (2-2) Temporary joining process of joining 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 joining rotary tool F is moved to form a continuous movement trajectory (bead) like a single stroke, and to the abutting portions J3, J1, J2. Friction stir continuously. That is, it moves to the end position E _P1 without deviating 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. Let's do it. In addition, in this embodiment, although the start position S _P1 of friction stirring is provided in the 2nd tab material 3 and the end position E _P1 is provided in the 1st tap material 2, the start position S _P1 ) And the end position (E _P1 ) are not intended to limit.

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

First, as shown in Fig.'S 5 (a), the second taepjae 3 is immediately above the start position (S _P1) installed in place by placing a joint rotation tool (F) for the, to continue the bonding moved down while the right for rotating the tool (F), press down the stirring pins (F2) to the starting 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 1, which are friction-stirred, in most cases, it is 500-2000 It is set in the range of (rpm).

When the stirring pin F2 contacts the surface 32 of the 2nd tab material 3, the metal around the stirring pin F2 is plasticized and fluidized by frictional heat, as shown to FIG. 5 (b). The stirring pin F2 is inserted into the 2nd tab material 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 s2 of the second tab material joining step.

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 to-be-joined metal member 1 friction-stirred, etc., in most cases , In the range of 100 to 1000 (mm / min). The rotational speed at the time of the movement of the temporary joining rotation tool F is equal to or lower than the rotational speed at the time of insertion. In addition, when moving the temporary welding rotation 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 makes it vertical without making it incline, the rotational tool F for temporary bonding ) Can be easily switched, allowing complex movement. When the temporary welding rotary tool F is moved, the metal around the stirring pin F2 is plastically fluidized sequentially, and the metal which was plastically fluidized is hardened again at the position spaced apart by the stirring pin F2. .

When the rotational welding tool F for temporary joining is relatively moved and friction stirring is performed continuously until the time point s2 of the second tap material joining step, the second joining rotation tool F is left as it is without leaving the temporary welding tool s2 at the time point s2. 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 of the second tab member 3 and the metal member 1 to be joined. Specifically, by setting the route of friction stir on the joint (boundary line) of the to-be-joined metal member 1 and the 2nd tab material 3, and moving the rotational tool F for temporary joining along the said route, Friction stirring is performed on the butt portion J3. In addition, in this embodiment, friction stirring is performed continuously from the time point s2 of the 1st tab material joining process to the end point e2, without leaving the temporary welding rotation tool F in the middle.

In addition, when turning the temporary welding rotation tool F to the right, since there exists a possibility that a microcavity may generate | occur | produce on the left side of the advancing direction of the temporary welding rotation tool F, the advancing direction of the temporary welding rotation tool F is carried out. It is preferable to set the position of the starting point s2 and the end point e2 of the second tab member bonding step so that the joined metal member 1 is located on 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, it is possible to obtain a high quality joined body.

Incidentally, in the case of rotating the temporary joining rotation tool F 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 joining rotation tool F, so that the progress of the temporary joining rotation tool F is advanced. It is preferable to set the position 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 start point is formed in the position of the end point e2 when the temporary welding rotation tool F is made to turn right, and the start point s2 when the temporary welding rotation tool F is turned to the right. An end point may be formed at the position of).

In addition, when the stirring pin F2 of the temporary welding rotary tool F enters the butt | matching part J3, although the force which tries to isolate the to-be-joined metal member 1 and the 2nd tab material 3 acts, Since the inner 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 case where an opening arises.

(2-2) Temporary Bonding Process

When the rotational welding tool F for temporary joining reaches the end point e2 of a 2nd tap material joining process, friction stirring is performed continuously to the starting point s1 of a temporary joining process, without ending friction stirring at the end point e2, Transfer to the temporary bonding process as it is. That is, friction stir is continued from the end point e2 of the 2nd tap material joining process to the time point s1 of the temporary joining process, without leaving | separating the rotational tool F for temporary joining, and also the rotation for temporary joining at the time point s1. The temporary joining process is performed without leaving the tool F away. By doing in this way, the detachment | work operation of the temporary welding rotation tool F in the end point e2 of a 2nd tab material joining process becomes unnecessary, and the temporary joining rotation tool F in the time point s1 of a temporary joining process is carried out. Since the insertion work is 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 e2 of the second tap material joining step to the time point s1 of the temporary joining step is set in the second tap material 3, and the rotational tool F for temporary joining is removed. The movement trace at the time of moving from the end point e2 of a 2nd tab material joining process to the time point s1 of a provisional joining process is formed in the 2nd tab material 3. In this way, in the process from the end point e2 of the second tab member joining step to the time point s1 of the provisional joining step, it is difficult to generate a cavity defect in the metal member 1 to be joined, thereby obtaining a high quality joined body. It becomes possible.

In the provisional bonding process, friction stir is performed with respect to the abutting part J1 (see FIG. 6) of the metal member 1 to be joined. Specifically, the whole of the butt | matching part J1 is set by setting the route of friction stirring on the joint (boundary line) of the to-be-joined metal member 1, and moving the rotational tool F for temporary joining along the said route. Friction stirring is performed continuously over the length. In addition, in this embodiment, friction stirring is performed continuously from the time point s1 of the temporary joining process to the end point e1, without leaving the temporary welding rotation 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 starting point s3 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 time point s3 of the 1st tab material joining process, without leaving the temporary welding rotation tool F, and also the rotation for provisional joining at the time point s3. The process moves to the first tab material joining step without detaching the tool F.

In this embodiment, the route of friction stirring from the end point e1 of the temporary bonding process to the time point s3 of the first tab member bonding process is set in the first tab member 2, and the rotary tool F for temporary bonding is added. The movement trace at the time of moving from the end point e1 of a joining process to the starting point s3 of a 1st tap material joining process is formed in the 1st tab material 2. In this case, in the process from the end point e1 of the temporary bonding step to the time point s3 of the first tab material joining step, it is difficult to generate a cavity defect in the metal member 1 to be joined, so that a high quality bonded body can be obtained. It becomes possible.

(2-3) First Tab Material Bonding Step

In the 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, by setting the route of friction stir on the joint (boundary line) of the to-be-joined metal member 1 and the 1st tab material 2, and moving the rotational welding tool F for temporary joining along the said route, Friction stirring is performed on the butt | matching part J2. In addition, in this embodiment, friction stirring is performed continuously from the time point s3 of the 1st tab material joining process to the end point e3, without leaving the temporary welding rotation tool F in the middle.

In addition, since the temporary welding rotation tool F is rotated to the right, the time point s3 of the 1st tab material joining process and the to-be-joined metal member 1 are located in the right direction of the advancing direction of the temporary welding rotation tool F, and The position of the end point e3 is set. In this case, since a cavity defect is less likely to occur on the side of the metal member 1 to be joined, it is possible to obtain a high quality joined body. Incidentally, when the temporary welding rotation tool F is turned left, the start point and the end point of the first tab material joining step are positioned such that the metal member 1 to be joined is located on the left side in the advancing direction of the temporary welding rotation tool F. It is desirable to set the position of. Although illustration is abbreviate | omitted specifically, the viewpoint (s3) when the viewpoint is provided in the position of the end point (e3) when the temporary welding rotation tool F is made to turn right, and the temporary welding rotation tool F is turned right (s3). The end point should be installed at the position of).

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 inner corner portions 2a and 2b (see FIG. 2) of the metal member 1 and the first tab member 2 are temporarily joined by welding, the metal member 1 and the first tab member 2 are interposed therebetween. An opening does not occur in the case.

When the temporary welding rotation tool F reaches the end point e3 of the 1st tap material joining process, the end position E _P1 provided in the 1st tab material 2 is not terminated by friction stirring at the end point e3. 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 the 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 S _M1 set in the surface 22 of the 1st tab material 2.

The preliminary hole P1 is formed for the purpose of reducing 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. It is formed by diameter expansion of the punching hole H1 formed when the fin F2 (refer to FIG. 4 (a)) is separated with a drill etc. which are not shown in figure. When the punching hole H1 is used, the formation process of the preliminary hole P1 can be simplified, and it can shorten work time. 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 form in J2, J3, it forms suitably on the extension line of the seam (boundary line) of the to-be-joined metal member 1 which appears 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 punching 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 of the stirring pin rotation for the maximum outside diameter (X ₂₎ is the junction of the (F2) the tool (G) stirring pin (G2) minimum outside diameter (Y ₃₎ than large, and stirring pin (F2) of the ₂ ) When the smaller than the maximum outer diameter Y ₂ of the stirring pin G2 (Y ₃ <X ₂ <Y ₂ ), etc., the punching 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 main joining process which concerns on this embodiment, the to-be-joined metal member (with respect to the butt | matching part J1 of the temporary joining state using the main joining rotation tool G shown to FIG. 4B) ( Friction stirring is performed from the surface A side of 1).

In the first main bonding step, as shown in FIGS. 7A to 7C, the bonding tool rotational tool G is formed in the preliminary hole P1 formed at the starting position S _M1 . The stirring pin G2 is inserted (press-in), and the inserted stirring pin G2 is moved to the end position E _M1 without leaving | separating in the middle. 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, at the time point when the 1st preliminary process is complete | finished, the friction stirring apparatus provided with the rotational welding tool F for temporary joining is located directly above the end position E _P1 of the 1st tab material 2 (refer FIG. 6). Therefore, when the start position of the first main joining step is set to S _M1 , the first main joining step can be performed without moving the friction stirring device provided with the rotary tool G for the main joining, and the operation can be omitted. .

Moreover, 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 tap 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)-FIG.7 (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 this joining rotary tool ( G) is lowered while turning right, and the tip of the stirring pin G2 is inserted into the 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 the metal is plastically fluidized from the hole wall. In such a state, the stirring fluid G enters while the plastic fluidized metal is pushed down to the circumferential surface of the stirring pin G2, so that the indentation resistance at the initial stage of the indentation can be reduced. Since the stirring pin G2 contacts the hole wall of the preliminary hole P1 before the shoulder portion G1 of the joining rotary tool G contacts the surface 22 of the first tab member 2, friction heat is generated. It is possible to shorten the time until plastic fluidization. That is, it becomes possible to reduce the load of the friction stirring device, and also to shorten the working time required for the present bonding step.

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) of FIG. 2, the bonding rotary tool G is relatively moved toward one end of the butt portion J1 of the metal member 1 to be joined while friction stirring, and the butt portion J2 is further moved. It intrudes into the abutting part J1 across. When the bonding rotary tool G is moved, the metal around the stirring pin G2 is plastically fluidized in sequence, and at the position spaced apart from the stirring pin G2, the metal that has been plastically fluidized is cured again. Thus, a plasticized region (hereinafter referred to as "surface side plasticized region W1") is formed.

Although the moving speed (feeding speed) of this joining rotary tool G is set according to the dimension and shape of the stirring pin G2, the material, thickness, etc. of the to-be-joined metal member 1 friction-stirred, etc., in most cases , Within the range of 30 to 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 rotation tool G, and the like. Moreover, when cooling water 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 on a joining surface (end surface 11a, 11b, FIG. 2 (b)). However, in this embodiment, since the clearance gap 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 deteriorates the quality of a junction part. There is no.

In the abutting part J1 of the metal member 1 to be joined, a route of friction stir is set on the joint phase (moving path image in the temporary joining process) of the metal member 1 to be joined, and the joint is viewed along the route. By carrying out the relative rotation of the rotating tool G, friction stirring is performed continuously from the one end part of the butt | matching part J1 to the other end part. When the bonding rotary tool G is relatively moved to the other end of the butting part J1, the bonding part J3 is traversed while performing friction stir, and is relatively moved to the end position E _{M1 as} it is.

In addition, in this embodiment, 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, Therefore, the route of friction stirring in a 1st main joining process can be made straight. When the route of the friction stirring is in a straight line, the moving distance of the main joining rotation tool G can be suppressed to a minimum, so that the first main joining step can be performed efficiently, and the main joining rotation 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 the stirring pin G2. A departure is made from the end position E _M1 (see FIG. 7B). In addition, when the stirring pin G2 is displaced upward at the end position E _M1 , the punching hole Q1 having 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 movement) of this rotational rotation tool G when the stirring pin G2 of this rotational rotation tool G separates from the end position E _M1 is the rotational speed at the time of movement. It is preferable to make it higher speed. In this way, since the separation resistance of the stirring pin G2 becomes small compared with the case where the rotational speed at the time of departure is the same as the rotational speed at the time of movement, the stirring pin G2 in the end position E _M1 It is possible to perform the detachment 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 preparation 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 of installing in the friction stirring apparatus not shown is provided.

(4-1) Reinstallation Process

In the reinstallation step, after the restraint of the joined metal member 1 that has finished the first main joining step is reversed, the front and back sides of the joined metal member 1 are reversed, and the rear surface B side is faced upward. Reinstall on the mount of the friction stir 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 front and back of the to-be-joined metal member 1 are reversed.

Here, FIG. 8 (a) is sectional drawing which looks at the 1st metal member 1a side from the butt | matching part J1 after the reinstallation process of the 2nd preparation process which concerns on 1st Embodiment. As shown in Fig. 8A, in the re-installation process, the upper surface of the metal member 1 to be joined becomes the back surface B, and the first metal member 1a is viewed from the butting part 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.

In addition, depending on the form of the friction stirring device, the front and back may be rotated without releasing the restraint of the metal member 1 to be joined.

(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) Joining process of 1st tab material, (5-2) provisional bonding process of joining butt | matching part J1 of the to-be-joined metal member 1, joining metal member 1 and 2nd tab material 3 (5-3) Preliminary hole formation process which forms a preliminary hole in the start position of friction stirring in the (5-3) 2nd tab material joining process which joins the butt | matching part J3 of Equipped with. 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 rotational tool F for temporary joining 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 bonding process, and (5-3) 2nd tab material joining process are the (2-3) 1st tab material joining process which concerns on said 1st preliminary process, It is a process substantially the same as the (2-2) provisional bonding process and (2-1) 2nd tab material bonding process. As shown in FIG. 8 (b), one temporary welding rotary tool F is moved to form a continuous movement trajectory (bead) like a single stroke, so that the abutments J2, J1, J3 Friction stirring is performed continuously in order. That is, it moves to the end position E _P2 without deviating 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. (5-1) The 1st tab material joining process, the (5-2) provisional bonding process, and (5-3) 2nd tab 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 the 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. The 1-tap material joining process was performed sequentially. On the other hand, in the 2nd preliminary process, when looking at the metal member 1a side from the butt | matching part J1, the 1st tab material 2 will be located in the left side of the to-be-joined metal member 1, and the 1st main joining process will be performed. Since the friction stir device provided with the rotation tool G for this joining is located above the 1st tap material 2 at the time of completion | finish, (5-1) 1st tap material joining process from the 1st tap material 2 side. , (5-2) provisional bonding step and (5-3) second tab member bonding step are performed sequentially. By doing in this way, since the movement distance of the friction stirring apparatus provided with the rotational welding tool F for temporary joining becomes small, work can be skipped.

In addition, detailed description of (5-1) 1st tab material joining process, (5-2) provisional joining process, and (5-3) 2nd tab material joining process is substantially equivalent to 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 rotary tool G for bonding. Thereby, the insertion resistance (pressing resistance) of the stirring pin G2 of this bonding rotation tool G can be reduced.

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

(6) second bone bonding step

The 2nd present 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 main joining process which concerns on this embodiment, it uses the rotation tool G for main joining, and it frictions from the back surface B side of the to-be-joined metal member 1 with respect to the butt | matching part J2 of the temporarily joined state. Stirring is performed.

As shown in Figs. 9A and 9B, the second main bonding step is a rotational tool G for bonding to S _M2 set on the back surface 33 of the second tab member 3. Of the stirring pin G2 is inserted (press-in), and the inserted stirring pin G2 is moved to the end position E _M2 without being detached in the middle. In the 2nd present joining process, friction stirring is started from the preliminary hole P2, and friction stirring is performed continuously to the end position E _M2 . That is, the starting position S _M2 of the second main bonding step is located above the end position E _M1 of the first main bonding step. By moving the rotary tool G for joining, the metal around the stirring pin G2 is plastically fluidized sequentially, and the metal which was plastically fluidized at the position spaced apart from the stirring pin G2 is hardened again. A plasticized 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 provisional joining is immediately above the end position E _P2 of the 2nd tab material 3 (FIG. 8 (b)). Reference], if the start position S _M2 of the second main bonding step is set above the second tab member 3, the friction stir device with the rotary tool G for the present bonding is moved without moving. 1 This joining process can be performed and a work can be skipped.

Since a 2nd main bonding process is substantially the same as a 1st main bonding process, detailed description is abbreviate | omitted. In addition, in this embodiment, although the 2nd preliminary process was performed, 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 the tab member cutting process, the first tab member 2 and the second tab member 3 are removed from the metal member 1 to be joined. In this embodiment, the to-be-joined metal member 1 which complete | finished the 2nd main joining process is once removed from the mount of a friction stirring apparatus, and the 1st tab member along the abutting parts J2 and J3 using the cutting mechanism not shown in figure. (2) and the 2nd tab material 3 are excised. At this time, it is preferable to remove the burr formed in the surface A and the back surface B of the to-be-joined metal member 1. Thereby, when performing the later-described tab material arrangement process, the first tab member 2 'and the second tab member 3' can be brought into close contact with the metal member 1 to be joined.

FIG. 10: is a perspective view which shows the to-be-joined metal member 1 after performing a tab material cutting process. As shown in FIG. 10, surface side plasticization area | region W1 and back surface 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 minute gap (unjoined part) which continues from the 1st side surface C side to the 2nd side surface D side is formed. .

Here, the surface-side small flame region (W1) and the back side small flame region (W2), the traveling direction of the rotary tool (G) for the bonding (see the arrow V _1, V ₂₎ the left side, i.e., the second metal member (1b) It is assumed that cavity defects R ₁ and R _{2 that} are continuous from the first side C side to the second side D side are generated.

(8) 3rd preparation process

In the third preparation step, when the friction stir at the side of the first side surface C is performed, an addition member (first tab member 2 ') and the first position at which the start position and the end position of the friction stir of the joined metal member 1 are provided. 2 tab material 3 ']. In the third preparation step, the tab member (8-1) in which the first tab member 2 'and the second tab member 3' are disposed on both sides of the butt portion J1 of the metal member 1 to be joined in this embodiment. (8-2) welding step of temporarily bonding the first tab member 2 'and the second tab member 3' to the to-be-joined metal member 1 by welding, and the to-be-joined metal member 1 And (8-3) reinstallation process of installing on the mount of the friction stirring apparatus which is not shown so that 1st side surface C of it may face an upper surface.

(8-1) Tap Repositioning Process

In the tab member arrangement step, as shown in FIG. 11, in the to-be-joined metal member 1 that has finished the second main bonding step, the second tab member 3 ′ is formed on the surface A so as to cover the butt portion J1. Is arranged so that the contact surface 31 'is brought into contact with the surface A. FIG. Moreover, the 1st tab material 2 'is arrange | positioned at the back surface B side so that the butt | matching part J1 may be covered, and the contact surface 21' is made to contact back surface B. As shown in FIG. At this time, similarly to the (1-2) tab member arrangement process, the front and back surfaces of the first tab member 2 'and the second tab member 3', and the first side surface C and the second side surface D are placed on the same plane. Position it.

(8-2) welding process

In the welding process, as shown in FIG. 11, the inner corner parts 2a 'and 2b' formed by the to-be-joined metal member 1 and the 1st tab material 2 'are welded, and the to-be-joined metal member 1 and The first tab member 2 'is bonded. Further, the inner corner portions 3a 'and 3b' formed by the joined metal member 1 and the second tab member 3 'are welded to join the joined metal member 1 and the second tab member 3'. do.

(8-3) Reinstallation Process

In the reinstallation process, as shown in FIG. 11, the first side C of the joined metal member 1, in which the welding process is completed, is directed upward, and the first metal member 1a is disposed from the butt portion J1. ), The to-be-joined metal member 1 is restrained by the mount of the friction stirring apparatus which is not shown in figure so that the 2nd tab material 3 'may be located in the left side, and it will install again.

(9) Third preliminary step

The 3rd preliminary process is equipped with the (9-1) preliminary hole formation process which forms a preliminary hole in the starting position of friction stirring before a 3rd main joining process.

(9-1) preliminary hole formation process

The preliminary hole forming step is a step of forming the preliminary hole P3 at the start position S _M3 of friction stirring in the third main joining step as shown in FIG. 11. That is, the preliminary hole forming step is a step of forming the preliminary hole P3 at the insertion scheduled position of the stirring pin G2 of the rotary tool G for bonding, similarly to the preliminary hole forming step. Thereby, the insertion resistance (pressing resistance) of the stirring pin G2 of this bonding rotation tool G can be reduced. (9-1) The preliminary hole forming step is substantially the same as the (2-4) preliminary hole forming step relating to the first preliminary step, and thus, detailed description thereof is omitted.

(10) Third bone bonding step

3rd this joining process is a process of joining the butt | matching part J1 in the 1st side surface C side of the to-be-joined metal member 1 to. In the 3rd present joining process which concerns on this embodiment, as shown in FIG. 11 and FIG. 12, the preliminary formed in the surface 32 'of the 2nd tab material 3' using the rotation tool G for this joining. The stirring pin G2 of this bonding rotary tool G is inserted into the hole P3 (press-in), and the inserted stirring pin G2 is moved to the end position E _M3 without deviating in the middle (forward direction). (V ₃ )]. That is, the start position S _M3 of the third main bonding step is located at the start position side (see the advance direction V ₁ ) of the first main bonding step.

When the joining rotary tool G is moved, the metal around the stirring pin G2 is plastically fluidized sequentially, and at the position spaced apart from the stirring pin G2, the metal which has been plastically fluidized again hardens again. Thus, a plasticized region (hereinafter referred to as "first side side plasticized region W3") is formed. When friction stirring is performed to the end position E _M3 , the punching hole Q3 is formed on the surface of the first tab member 2 ′ as shown in FIG. 13, but is left as it is in this embodiment.

Here, when the 2nd main joining process is complete | finished, as shown in FIG.9 (b), the friction stirring apparatus provided with the rotational tool F for temporary joining is located above the 1st tab material 2 have. Therefore, as shown in FIG. 12, when the starting position of a 3rd main joining process is set above the 2nd tap material 3 ', the friction stirring apparatus provided with the rotation tool G for this bonding will not be moved. A 3rd main joining process can be performed and an operation can be skipped. The detailed description of the third main bonding step is omitted since it is substantially equivalent to the first main bonding step.

As shown in FIG. 13, when a 3rd main bonding process is performed, a part of the 1st side surface C side of the surface side plasticization area | region W1 and the back side plasticization area | region W2, and the 1st side surface side small size will be described. Torch area W3 overlaps. That is, the surface side small flame region (W1) and the back surface predetermined by being a part of the flame zone (W2) for friction stir again, the first side (C) co-defective (R ₁₎ and cavity defects (R ₂₎ on the side of at least A part is divided by the 1st side side plasticization area | region W3. Thereby, the charging parts S ₁ and S ₂ are formed in the cavity defect R ₁ and the cavity defect R ₂ , respectively.

In addition, in this embodiment, although the 3rd preparatory process and the 3rd preliminary process were performed before performing the 3rd main joining process, the 3rd preparatory process and the 3rd preliminary process (except a reinstallation process) are abbreviate | omitted. The third main bonding step may be performed immediately after the second main bonding step.

In addition, you may perform the above-mentioned 1st tab material joining process, a temporary joining process, and a 2nd tab material joining process before a 3rd main joining process.

(11) 4th preparation process

The fourth preparation step is a step performed before the fourth main joining step. In the present embodiment, the second side surface D side of the to-be-joined metal member 1 faces upward, and is installed again in a clamp (not shown). (11-1) A reinstallation process is provided.

(11-1) Reinstallation Process

In the reinstallation process, after the restraint of the joined metal member 1 which has finished the third main joining process is released, the front and back sides of the joined metal member 1 are reversed, with the second side surface D facing upward. And re-install to stand of friction stirring device (not shown). In this embodiment, the to-be-joined metal member 1 is rotated halfway around the left-right axis shown in FIG. 12, and the front and back of the to-be-joined metal member 1 are reversed. Thereby, as shown in FIG. 14, when the upper surface of the to-be-joined metal member 1 turns into the 2nd side surface D, and looks at the 2nd metal member 1b from the butt | matching part J1, it is made into a right side on the right side. 1 tap material 2 'is located.

In addition, depending on the friction stirring device, the front and back may be rotated without releasing the restraint of the metal member 1 to be joined.

(12) Fourth preliminary step

The 2nd preliminary process is a process performed before a 4th main joining process, and forms a preliminary hole in the start position of friction stirring in a 4th main joining process in the 2nd side surface D side (12-1 ) A preliminary hole forming step is provided.

(12-1) preliminary hole forming process

The preliminary hole forming step is a step of forming the preliminary hole P4 at the starting position S _M4 of friction stirring in the fourth main joining step as shown in FIG. 14A. Thereby, the insertion resistance (pressing resistance) of the stirring pin G2 of this bonding rotation tool G can be reduced.

In addition, since the preliminary hole formation process (12-1) is substantially equivalent to the (2-4) preliminary hole formation process which concerns on a 1st preliminary process, detailed description is abbreviate | omitted.

(13) Fourth main bonding step

The 4th present joining process is a process of joining the butt | matching part J1 in the 2nd side surface D of the to-be-joined metal member 1 to. In the 4th present joining process which concerns on this embodiment, friction stirring is performed from the 2nd side surface D side of the to-be-joined metal member 1 using the rotation tool G for this joining.

In the fourth main bonding step, as illustrated in FIG. 14A, the stirring pin G2 of the rotary tool G for bonding is placed at the starting position S _M4 provided in the first tab member 2 ′. It inserts (presses in) and moves the inserted stirring pin G2 to the end position E _M4 without deviating in the middle. In the 4th present joining process, friction stirring is started from the preliminary hole P4, and friction stirring is performed continuously to the end position E _M4 . That is, the start position S _M4 of the fourth main bonding step is located at the start position side (see the advance direction V ₂ ) of the second main bonding step. When the joining rotary tool G is moved, as shown in FIG. 14B, the metal around the stirring pin G2 is sequentially plastically fluidized and spaced apart from the stirring pin G2. At the position, the metal that has been plastically fluidized is cured again to form a plasticization region (hereinafter referred to as "second side surface side plasticization region W4").

When the 3rd main joining process is complete | finished, as shown in FIG. 13, the friction stirring apparatus provided with the rotation tool G for this bonding is located above the 1st tab material 2 '. And the said friction stirring apparatus is still located above the 1st tab material 2 'by half-rotating to the left-right axis after a (11-1) reinstallation process. Therefore, if the start position of a 4th main joining process is set above 1st tab material 2 ', a 4th main joining process may be performed without moving the friction stirring apparatus provided with the rotation tool G for this joining. Can be omitted.

Here, when the fourth main bonding step is performed, as shown in FIG. 14B, a part of the second side surface D side of the surface-side plasticized region W1 and the back-side plasticized region W2, Second side surface plasticization region W4 overlaps. That is, the surface side small flame region (W1) and the back surface predetermined by being a part of the flame zone (W2) for friction stir again, and the second side (D) co-defective (R ₁₎ and cavity defects (R ₂₎ on the side of at least A part is divided by the 2nd side side plasticization area | region W4. As a result, the charging portions S ₃ and S ₄ are formed in the cavity defect R ₁ and the cavity defect R ₂ , respectively.

In addition, before performing a 4th main bonding process, you may abbreviate | omit the preliminary hole formation process (12-1), and may perform a 3rd main bonding process immediately after a 3rd main bonding process. In addition, you may perform the above-mentioned 1st tab material joining process, a temporary joining process, and a 2nd tab material joining process before a 4th main joining process.

(14) tapping material cutting process

In a tab material cutting process, after finishing 4th main joining process, the 1st tab material 2 'and the 2nd tab material 3' are cut out from the to-be-joined metal member 1 (refer FIG. 1). At this time, it is preferable to remove the burr generated in the first side surface C and the second side surface D of the metal member 1 to be joined.

According to the joining method which concerns on this embodiment demonstrated above, even if the 1st metal member 1a and the 2nd metal member 1b are thick as shown in FIG. 1, 1st side surface C and 2nd side surface ( By performing friction stirring to D), the clearance gap (refer the clearance 119 of FIG. 30) continuous from the 1st side surface C to the 2nd side surface D can be filled.

In addition, when the rotation direction and the advancing direction of this bonding rotation tool G are set as mentioned above, 1st side surface C to the surface side plasticization area | region W1 and the back surface side plasticization area | region W2. Even if continuous cavity defects R ₁ and R ₂ are formed over the second side surface D, the starting position S _M3 in the third main bonding step is set to the starting position S of the first main bonding step. _M1) side, the fourth by this joining operation start position (S _M4) the second start position (S _M2) friction stir set side in the present bonding process in, joint defects (R _1, R ₂₎ Charge portions S ₁ to S ₄ may be formed to respectively divide the portions.

That is, in this embodiment, since all the rotation directions of this bonding rotation tool G are set to the right rotation, the cavity defect R of the surface side plasticization area | region W1 and the back side plasticization area | region W2 is It is highly likely to occur on the left side of the advancing direction, and a relatively high density plasticized region is formed on the right side of the advancing direction. By using the characteristics of such friction stirring, as shown in Figs. 1A and 1B, the cavity defects R ₁ and R ₂ are likely to be formed in the second metal member 1b. In this high case, by setting the starting position of the main joining rotation tool G of the third main joining step and the fourth main joining step as described above, both ends of the cavity defects R ₁ and R ₂ are relatively dense. Can be divided into a high plasticization region. Thereby, the to-be-joined metal member 1 with higher watertightness and airtightness between 1st side surface C and 2nd side surface D can be manufactured.

Here, when this joining rotation tool G crosses the butt | matching part J1, J2, there exists a possibility that an oxide film may be formed in plasticization area | regions W1-W4. For example, as shown in FIG.7 (b), when performing friction stirring from the to-be-joined metal member 1 toward the 2nd tab material 3, when it crosses the butt | matching part J3, the to-be-joined metal The oxide film formed between the member 1 and the first tab member 2 is rolled to the surface side plasticized region W1 side. The oxide film is likely to be formed on the right side in the advancing direction of the surface-side plasticized region W1 when the bonding rotary tool G is rotated in the right direction, and on the left side in the advancing direction of the surface-side plasticized region W1 when it is turned left.

However, according to this embodiment, since the both ends of the plasticization area | regions W1 to W4 are overlapped, an oxide film can be segmented and a high quality product can be manufactured.

In addition, in this embodiment, although the 2nd tab material bonding process, the provisional bonding process, and the 1st tab material bonding process were performed as mentioned above, it is not limited to this. For example, friction stirring may be performed intermittently for each step, rather than always in a manner such as one stroke. In addition, in this embodiment, although the provisional bonding process and this bonding process were performed using a pair of tab material, you may perform friction stirring, without using a tab material. In this embodiment, the first main bonding step is performed immediately after the first preliminary step, but after the second preliminary step is performed immediately after the first preliminary step, the first main joining step and the second main joining step are performed. You may carry out continuously.

As mentioned above, when this invention joins the outer periphery 4 sides of the to-be-joined metal member 1 by friction stirring, setting each of the rotation direction and advancing direction of this rotation tool G for bonding suitably is appropriate. It is characterized by. That is, when performing friction stirring, it is preferable to set the rotation direction and the advancing direction of this joining rotary tool G in consideration of the position where the cavity defect R is likely to generate | occur | produce. In 1st Embodiment, although the case where all the rotation tool G for this bonding was rotated right was demonstrated, it is not limited to this, Various bonding is performed by the rotation direction and the advancing direction of this rotation tool G for this bonding. We can think of variation of.

[Second Embodiment]

For example, in the 1st embodiment, although all the rotation directions of this bonding rotation tool G were set to right rotation, you may set all to the left rotation similarly to 2nd embodiment.

As shown in Fig. 15, by setting the rotational direction of the joining rotation tool (G) for the left direction, the first the bonding surface (A) of the bonded metallic member 1 in the traveling direction (V ₁₎ when performing the process, the second bonding step is carried out a friction stir toward the first start position side [the traveling direction (V _2)] from the end position side of the bonding process. At this time, since the joining rotation tool G is left-turned, the cavity defect R is likely to occur on the right side in the advancing direction of the front side plasticized region W1 and the back side plasticized region W2, and thus the left side in the advancing direction. The relatively high density plasticization region is formed. In other words, it tends to be the case, the first joint defect in the metal member _{(1a) (R 1, R} 2) is formed.

Thus, the third joining step is carried out to the friction stir in the traveling direction (V ₃₎ from the start position side of the first bonding step. And, the fourth joining step is carried out to the friction stir in the traveling direction (V ₄₎ from the start position side of the second bonding step. According to the third main bonding step and the fourth main bonding step, both ends of the cavity defects R ₁ and R ₂ are friction-stirred again, and are divided into a relatively dense plasticized region. Thereby, since the filling parts S ₁ to S ₄ are formed, the airtightness and water tightness between the first side surface C and the second side surface D can be further improved.

That is, as shown in 1st Embodiment and 2nd Embodiment, when the rotation directions of this bonding rotation tool G are all the same direction, the starting position of the friction stirring in a 2nd main joining process is 1st. The starting position of the friction stirring in the 3rd bone joining process is set to the end position side of the friction stirring in 1 main joining process, and the start position of the friction stirring in the 1st main joining process, and the 2nd bone The starting position of the friction stirring in the fourth main joining step is set to either one of the start position sides of the friction stirring in the joining step, and the start position of the friction stirring in the first main joining step and the second bone. What is necessary is just to set it to the other side of the starting position side of friction stirring in a joining process.

[Third embodiment]

For example, the bonding method which concerns on 3rd Embodiment shown in FIG. 16 differs from 1st Embodiment in that the rotation direction of this bonding rotation tool G is not the same direction.

In the joining method according to the third embodiment, in the first main joining step, the rotation direction of the main joining rotation tool G is set to left rotation, and the second side face D is provided from the first side C. Friction stirring is performed toward (refer to progress direction V ₁ ′).

On the other hand, the 2nd main bonding process sets the rotation direction of the main bonding rotation tool G to right rotation, sets the start position of friction stirring to the start position side of a 1st main bonding process, and 1st side surface C Friction stirring is performed from the) side toward the second side surface D side (refer to the advancing direction V ₂ ′). At this time, the cavity defect R ₁ formed in the surface side plasticized region W1 and the cavity defect R ₂ formed in the back side plasticized region W2 are both easily formed in the first metal member 1a. .

Therefore, in the 3rd main joining process, when the rotation direction of the main joining rotary tool G is set to left rotation as shown in FIG. 16, the start position of friction stirring is set to the start position side of a 1st main joining process. Then, friction stirring is performed from the surface A side toward the rear surface B side (refer to the advance direction V ₃ ′). On the other hand, in the 4th main joining process, when the rotation direction of the main joining rotary tool G is set to right rotation, the start position of friction stirring is set to the end position side of a 1st main joining process, and it is the surface A side. Friction stirring is performed from the back surface B side (refer to the progress direction V ₄ ′). According to the third main bonding step and the fourth main bonding step, both ends of the cavity defects R ₁ and R ₂ are friction-stirred again, and are divided into a relatively dense plasticized region. As a result, since the filling parts S ₁ to S ₄ are formed, the airtightness and water tightness of the first side surface C and the second side surface D side can be further improved.

That is, as shown in FIG. 16, in the 1st main joining process, the main joining rotation tool G is rotated left and the 1st metal member 1a is located to the right of the advancing direction of the main joining rotation tool G. As shown in FIG. Is set so that the second metal bonding step WHEREIN: The 1st metal member 1a is located in the advancing direction left of the main bonding rotation tool G in the 2nd main bonding process, and is rotated right. When it is set to, the third bone bonding step and the fourth bone bonding step are the bonding tools for rotation so that the first metal member 1a is located on the right side in the advancing direction when the bonding tool is rotated to the right. Is set, and the advancing direction of the present bonding rotation tool G is set such that the first metal member 1a is positioned on the left in the advancing direction when the present bonding rotation tool G is turned left, the first side surface C. The airtightness and watertightness on the side of the second side surface D can be further improved.

In addition, although not shown in figure, in the 1st main joining process, the main bonding rotation tool G is rotated to the right, and the 1st metal member 1a is located in the advancing direction right side of the main bonding rotation tool G. On the other hand, in the second main joining step, the main joining rotation tool G is rotated to the left, and the first metal member 1a is set to the left in the advancing direction of the main joining rotation tool G. In one case, in the third bone bonding step and the fourth bone bonding step, when the main bonding rotation tool G is rotated to the right, the progress of the rotation rotary tool G for bonding is performed such that the first metal member 1a is positioned on the left side in the advancing direction. Direction is set, and when the advancing direction of this bonding rotation tool G is set so that the 1st metal member 1a may be located in the advancing direction right side when this bonding rotation tool G turns left, the 1st side surface C ) And the airtightness and watertightness of the 2nd side surface D side can be improved more.

In other words, when it is formed on the surface side small flame region (W1) and the back side small torch region cavity defects (R _1, R ₂₎ a first metal member (1a) formed in the (W2), third the joining process And in the fourth main bonding step, it is preferable to set the rotation direction and the advancing direction of the main rotary tool G such that the first metal member 1a side is friction-stirred at a higher density than the second metal member 1b side. .

On the other hand, when it is formed on the surface side small flame region (W1) and the back side small torch region cavity defects (R _1, R ₂₎ of the second metal member (1b) formed in the (W2), third the bonding process, and In the 4th present joining process, it is preferable to set the rotation direction and the advancing direction of this bonding rotary tool G so that the 2nd metal member 1b side may friction stir more densely than the 1st metal member 1a side.

In addition, this invention can be suitably changed in the range which does not deviate from the meaning of this invention. For example, 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, but friction is carried out while the rotation tool for joining which looked around the to-be-joined metal member moves. You may agitate. The first metal member 1a and the second metal member 1b may be hollow members.

In addition, in this embodiment, the 3rd bone which performs friction stirring with respect to the 1st side surface C of the to-be-joined metal member 1 as a side bone joining process which performs friction stirring from the side surface of the to-be-joined metal member 1 is carried out. Although the 4th main bonding process which performs friction stirring with respect to a joining process and the 2nd side surface D was performed, you may only perform friction stirring with respect to either one side surface.

[Fourth Embodiment]

As shown in FIG. 17, the joining method which concerns on 4th Embodiment of this invention is the 1st metal member 201a and 2nd metal member 201b provided with the main-body part and the step part which becomes a part thinner than a main-body part. The friction stir is performed from the surface A, the rear surface B, the first side surface C, and the second side surface D with respect to the butt portion J21 of the joined metal member 201 which is formed to face each other. And the extension distance of the plasticization area | region formed in 1st side surface C and 2nd side surface D is larger than the thickness dimension of the butt | matching part J21 of the to-be-joined metal member 201. It is characterized by the above-mentioned.

As shown in FIG. 18, the 1st metal member 201a and the 2nd metal member 201b are the members which are substantially equivalent shape, The main-body part Q which is a thick part, and the edge part of the main-body part Q are shown. It is comprised by providing the step | step part R formed in the thin part. The first metal member 201a and the second metal member 201b are made of a friction stirable metal material such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, or magnesium alloy.

In the following description, the surface of the 1st metal member 201a is made into the surface 212a, the back surface is the back surface 213a, one side surface is the side surface 214a, and the other side surface is the side surface 215a. In addition, the end surface of the stepped portion R is formed with the surface of the stepped portion R 217a, the end surface of the stepped portion R formed perpendicular to the stepped surface 217a, the stepped end portion 218a, and the stepped surface 217a. Let the surface which rises vertically from () be the vertical surface 216a. The height of the stepped end surface 218a is formed of p1, the width of the stepped surface 217a is formed of p2, and the height of the vertical surface 216a is formed of p3.

On the other hand, the surface of the 2nd metal member 201b is made into the surface 212b, the back surface 213b, one side surface 214b, and the other side surface 215b. In addition, the end surface of the stepped portion R is formed with the surface of the stepped portion R 217b, and the end surface of the stepped portion R formed perpendicular to the stepped surface 217b is the stepped end portion 218b and the main body portion Q. The surface formed vertically from the stepped surface 217b on the side is referred to as the vertical surface 216b. The height of the stepped end surface 218b is formed by q1, the width of the stepped surface 217b is formed by q2, and the height of the vertical surface 216b is formed by q3.

The lengths between the side surfaces of the first metal member 201a and the second metal member 201b are approximately equal, and the opposing stepped portions R are formed of p1 q1, p2 q1, and p3 q1, respectively. It is.

Next, the joining method which concerns on 4th Embodiment is demonstrated. The joining method which concerns on 4th Embodiment is a (1) preparatory process, (2) 1st preliminary process, (3) 1st main bonding process, (4) 2nd preliminary process, (5) 2nd main bonding process, (6) 3rd preparatory process, (7) 3rd preliminary process, (8) 3rd main bonding process, (9) 4th preliminary process, and (10) 4th main bonding process. In addition, it is also called a side bone joining process in combination of a 3rd bone joining process and a 4th bone joining process. In addition, description is abbreviate | omitted about the part which overlaps with 1st Embodiment.

(1) preparation process

In the preparatory step, the first tab member 202 is formed on both sides of the metal member 201, and an abutting step of forming the joined metal member 201 by abutting the first metal member 201a and the second metal member 201b. And a tab member arrangement step of arranging the second tab member 203, a welding step of temporarily joining the first tab member 202, the second tab member 203, and the to-be-joined metal member 201 by welding, and the metal to be joined. It is provided with the installation process which attaches the member 201 to the mount of a friction stirring apparatus not shown.

As shown in FIGS. 18A and 18B, the butt step includes a vertical surface 216a, a stepped surface 217a, and a stepped end surface 218a of the first metal member 201a. And the stepped end surface 218b, the stepped surface 217b and the vertical surface 216b of the second metal member 201b face each other. In addition, the surface 212a of the first metal member 201a and the surface 212b of the second metal member 201b are positioned on the same plane, and the back surface 213a of the first metal member 201a and the second The surface 213b of the metal member 201b is located in the same plane. Moreover, one side surface 214a of the 1st metal member 201a and one side surface 214b of the 2nd metal member 201b are located in the same plane, and the other side of the 1st metal member 201a is not located. The side surface 215a and the other side surface 215b of the 2nd metal member 201b are located in the same plane. As shown to FIG. 17 and FIG. 18B, the butt | matching part J21 is formed in the abutment surface of the 1st metal member 201a and the 2nd metal member 201b by a butt process.

In addition, the surface of the to-be-joined metal member 201 is made into the surface A, the back surface as the back surface B, the one side surface as the 1st side surface C, and the other side surface as the 2nd side surface D. As shown in FIG. In addition, each planar linear which forms the butt | matching part J21 in 1st side surface C and 2nd side surface D is set to L1, L2, and L3. Planar linear L2 is formed substantially perpendicular to planar linear L1 and planar linear L3, respectively.

In a tab material arrangement process, a pair of tab material is arrange | positioned at the both sides of the to-be-joined metal member 201. As shown in FIGS. 19 and 20, the first tab member 202 and the second tab member 203 are disposed so as to sandwich the butting part J21 therebetween, respectively, and the first side surface C and the second side surface ( It is provided with the dimension and shape which can cover the butt | matching part J21 shown by D). Each of the first tab member 202 and the second tab member 203 has the same thickness as that of the metal member 201 to be joined, and the front and rear surfaces of the first tab member 202 and the second tab member 203 are respectively. The silver is formed on the same plane as the surface A and the back surface B of the metal member 201 to be joined. Although there is no restriction | limiting in particular in the material of the 1st tab material 202 and the 2nd tab material 203, In this embodiment, it forms with the metal material of the same composition as the metal member 201 to be joined.

In the welding process, as shown in FIG. 19, the inner corner parts 202a and 202b formed by the to-be-joined metal member 201 and the 1st tab material 202 are welded, and the to-be-welded metal member 201 and 1st are welded. The tab member 202 is temporarily bonded. Further, the inner corner portions 203a and 203b formed by the joined metal member 201 and the second tab member 203 are welded to temporarily join the joined metal member 201 and the second tab member 203. In addition, welding may be performed continuously over the entire length of the inner corner portions 202a, 202b and 203a, 203b, or may be interrupted and welded.

In the installation step, the joined metal member 201 in which the first tab member 202 and the second tab member 203 are welded is mounted on a mount of a friction stirring device (not shown), and, for example, cannot be moved using a clamp. Restrain it. The friction stirring device according to the present embodiment is a device set to perform friction stirring from above the metal member 201 to be joined.

(2) first preliminary step

In the first preliminary step, temporary welding is performed using the small rotating tool F with respect to the butt portion J21 appearing on the surface A of the metal member 201 to be joined. The 1st preliminary process which concerns on this embodiment is the 2nd tab material joining process which joins the butt | matching part J23 of the to-be-joined metal member 201 and the 2nd tab material 203, and the butt part of the to-be-joined metal member 201. Bonding process of joining (J21), the 1st tap material joining process of joining the butt | matching part J22 of the to-be-joined metal member 201 and the 2nd tab material 202, and the friction stirring in a 1st main joining process. A preliminary hole forming step of forming a preliminary hole at a starting position of the same is provided.

In the first preliminary step, as shown in Fig. 20, one temporary joining rotary tool F is moved to form a continuous movement trajectory (bead) like a single stroke, and the abutting portions J23, J21, and J22 are used. Friction stirring is performed continuously. That is, the stirring pin F2 (refer FIG. 20) of the temporary joining rotation tool F inserted in the starting position S _P1 of friction stirring is moved to the end position E _P1 , without leaving it in the middle. Moreover, in this embodiment, although the starting position S _P1 of friction stirring is provided in the 2nd tab material 203, and the ending position E _P1 is provided in the 1st tap material 202, the starting position S _P1 It is not intended to limit the positions of the and end positions E _P1 .

As shown in FIG. 20, the small rotating tool F is located directly above the starting position S _P1 provided in place of the second tab member 203, and the lower rotating tool F is then lowered while being lowered. to push down the stirring pins (F2) to the starting position (S _P1). When the whole of the stirring pin F2 enters the 2nd tap material 203, and the whole surface of the lower end surface F11 of the shoulder part F1 contacts the surface of the 2nd tap material 203, the small rotating tool F ) Is relatively moved toward the starting point s3 of the second tab material joining step while rotating. When the small rotary tool F is relatively moved and friction stir is performed continuously up to the time point s3 of the second tap material joining process, the second tap material joining process is performed as it is without leaving the small rotary tool F at the time point s3. To fulfill.

In the second tab member bonding step, friction stirring is performed on the butt portion J23 of the second tab member 203 and the metal member 201 to be joined. Specifically, the butt part is set by setting the route of friction stir on the joint (boundary line) of the to-be-joined metal member 201 and the 2nd tab material 203, and moving the small rotation tool F along the said route. Friction stirring is performed for (J23). In addition, in this embodiment, friction stirring is performed continuously from the time point s3 of the 2nd tap material joining process to the end point e3, without leaving the small rotating tool F in the middle.

Moreover, when the stirring pin F2 of the small rotating tool F enters the butt | matching part J23, the force which tries to isolate | separate the to-be-joined metal member 201 and the 2nd tab material 203 acts, but the to-be-joined metal member Since the inner corner portions 203a and 203b (see FIG. 21) formed by the 201 and the second tab member 203 are temporarily joined by welding, the metal member 201 and the second tab member 203 are joined. Openings can be prevented.

When the small 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 end of the friction agitation at the end point e3, and then left as it is. Transfer to the bonding process. That is, friction stirring is continued from the end point e3 of a 2nd tap material joining process to the time point s1 of a provisional bonding process, without leaving the small rotation tool F, and at the time point s1, the small rotation tool F is carried out. The process proceeds to the temporary bonding process without deviating. In this way, the detachment | work operation of the small rotation tool F in the end point e3 of a 2nd tap material joining process becomes unnecessary, and the insertion work of the small rotation tool F in the time point s1 of a temporary joining process is no longer performed. Since it becomes unnecessary, the preliminary joining operation can be made more efficient and faster.

In the provisional bonding step, friction stirring is performed on the butt portion J21 of the metal member 201 to be joined. Specifically, the route of friction stir is set on the joint (boundary line) of the to-be-joined metal member 201, and the small rotation tool F is moved relatively along the said route, and it is set to the full length of the butt | matching part J21. Friction stirring is performed continuously over. In addition, in this embodiment, friction stirring is performed continuously from the time point s1 of the temporary joining process to the end point e1, without leaving the small rotating tool F in the middle.

When the small rotary tool F reaches the end point e1 of the provisional joining process, the friction stir is continuously performed to the start point s2 of the first tap material joining process without terminating the friction agitation at the end point e1, and the 1 Transfer to the tap material joining process. That is, friction stirring is continued without leaving small rotating tool F from the end point e1 of the provisional joining process to the starting point s2 of a 1st tap material joining process, and also the small rotating tool F at the time point s2. The process proceeds to the first tab material joining step without deviating.

In the first tab member joining step, friction stirring is performed on the butt portion J22 between the metal member 201 and the first tab member 202 to be joined. Specifically, the butt part is set by setting a route of friction stir on the joint (boundary line) of the metal member 201 and the first tab member 202 to be relatively moved along the route. Friction stirring is performed for (J22). In addition, in this embodiment, friction stirring is performed continuously from the time point s2 of the 1st tab material joining process to the end point e2, without leaving the small rotating tool F in the middle.

In addition, when the stirring pin F2 of the small rotating tool F enters the butt | matching part J22, although the force which tries to separate the to-be-joined metal member 201 and the 1st tab material 202 acts, the to-be-joined metal member Since the inner corner portions 202a and 202b of the 201 and the first tab member 202 are temporarily joined by welding, it is possible to prevent the occurrence of an opening between the metal member 201 and the first tab member 202 to be joined. Can be.

When the small rotary tool F reaches the end point e2 of the first tap material joining process, the end point e2 is continuous to the end position E _P1 provided in the first tap material 202 without ending the friction agitation. Friction stirring. 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 201. 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 small rotary tool F reaches the end position E _P1 , the small rotary tool F is raised while rotating the small rotary tool F to release the stirring pin F2 from the end position E _P1 .

In a preliminary hole formation process, it is a process of forming a preliminary hole in the starting position of friction stirring in a 1st main joining process (refer FIG. 4 (b)). In the preliminary hole forming step according to the present embodiment, a preliminary hole (not shown) is formed in S _M1 set on the surface of the first tab member 202.

(3) First main bonding step

The first main joining step is a step of authentically joining the butt portion J21 on the surface A side of the joined metal member 201. 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 201 with respect to the butt | matching part J21 of the temporarily joined state using the large rotating tool G. Do it.

In the 1st main joining process, as shown in FIG. 21, the stirring pin G2 of the large rotating tool G rotated right to the starting position S _M1 is inserted (press-in), and the inserted stirring pin G2 is inserted. It moves to the end position E _M1 without deviating in the middle. 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 .

In addition, in this embodiment, although the start position S _M1 of friction stirring is provided in the 1st tab material 202 and the end position E _M1 is provided in the 2nd tap material 203, the start position S _M1 It is not intended to limit the positions of the and end positions E _M1 .

The first present bonding step will be described in more detail with reference to FIG. 21.

First, as shown in FIG. 21, the large rotating tool G is located directly above the preliminary hole (starting position S _M1 ), and then the large rotating tool G is lowered while turning right and the stirring pin ( Insert the tip of G2) into the spare hole. When the whole of the stirring pin G2 enters the 1st tap material 202, and the whole surface of the lower end surface G11 of the shoulder part G1 contacts the surface of the 1st tap material 202, while carrying out friction stirring, The large rotating tool G is relatively moved toward one end of the butt portion J21 of the metal member 201 to be joined, and the butt portion J22 is crossed so as to rush into the butt portion J21. When the large rotary tool G is moved, the metal around the stirring pin G2 is plastically fluidized in sequence, and at the position spaced apart from the stirring pin G2, the metal that has been plastically fluidized is cured again and plasticized. A region (hereinafter referred to as "surface side plasticized region W21") is formed.

In the abutment part J21 of the to-be-joined metal member 201, a frictional stirring route is set in the seam phase of the to-be-joined metal member 201 (moving trajectory phase in a temporary joining process), and large rotation along this route is carried out. By carrying out the relative movement of the tool G, friction stirring is performed continuously from one end part of the butt | matching part J21 to the other end part. When the large rotary tool G is relatively moved to the other end of the butt part J21, the butt part J23 is traversed while performing friction stirring, and is relatively moved toward the end position E _{M1 as} it is.

When the large rotary tool G reaches the end position E _M1 , it raises, rotating the large rotary tool G, and disengages the stirring pin G2 from the end position E _M1 .

(4) second preliminary step

In a 2nd preliminary process, temporary joining is performed using the small rotating tool F with respect to the butt | matching part J21 shown by the back surface B of the to-be-joined metal member 201. FIG. The second preliminary step includes a first tab member joining step of joining the joined metal member 201 and the first tab member 202, a temporary joining step of joining the butt portion J21 of the joined metal member 201, and A preliminary step of forming a preliminary hole at the start position of friction stirring in the second tab member joining step of joining the joined portion J23 of the metal member 201 to the second tab member 202 and the second main joining step; The hole formation process is provided.

Since the second preliminary step is substantially the same as the first preliminary step except that the second preliminary step is performed on the back surface B of the metal member 201 to be joined, description thereof is omitted.

(5) 2nd main bonding process

The 2nd present joining process is a process of joining the butt | matching part J21 in the back surface B side of the to-be-joined metal member 201 in earnest. 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 201 with respect to the butt | matching part J21 of the temporarily joined state using the large rotating tool G. Do it.

In the 2nd present joining process, as shown in FIG. 22, the stirring pin G2 of the large rotating tool G rotated to the starting position S _M2 was inserted (press-in), and the inserted stirring pin G2 was inserted. It moves to the end position (E _M2 ) without leaving in the middle. By the 2nd main joining process, the back surface side plasticization area | region W22 is formed in the back surface B of the to-be-joined metal member 201. FIG. Since the 2nd main joining process is substantially the same as the 1st main joining process mentioned above except having performed on the back surface B of the to-be-joined metal member 201, detailed description is abbreviate | omitted.

In addition, when the second main bonding step is completed, the first tab member 202 and the second tab member 203 are removed from the joined metal member 201.

(6) 3rd preparation process

The third preparation step includes a tab member arrangement step of arranging the first tab member 204 and the second tab member 205 on both sides of the butt portion J21 of the metal member 201 to be joined, and the first tab member. A welding step of temporarily joining the 204 and the second tab member 205 to the to-be-joined metal member 201 by welding, and an installation step of installing the to-be-joined metal member 201 on a mount of a friction stirring device (not shown). Equipped with.

In the tab material arrangement step, as shown in FIG. 23, a pair of tab materials are disposed on the front surface A and the rear surface B of the metal member 201 to be joined. As shown in FIG. 23, the first tab member 204 and the second tab member 205 are disposed so as to sandwich the abutting portion J21 therebetween, and the abutting portions appearing on the front surface A and the rear surface B, respectively. It is provided with the dimension and shape which can cover J21). The front and back surfaces of the first tab member 204 and the second tab member 205 are formed on the same plane as the first side surface C and the second side surface D of the metal member 201 to be joined, respectively. Although there is no restriction | limiting in particular in the material of the 1st tab material 204 and the 2nd tab material 205, In this embodiment, it forms with the metal material of the same composition as the metal member 201 to be joined.

In the welding process, the inner corner portion formed by the metal member 201, the first tab member 204, and the second tab member 205 is welded to weld the metal member 201, the first tab member 204, and the second tab member. (205) is temporarily bonded.

In the installation step, the joined metal member 201 in which the first tab member 204 and the second tab member 205 are welded is mounted on a mount of a friction stirring device (not shown), and is immovably, for example, using a clamp. Redeem.

(7) third preliminary step

A first tab member joining step of joining the joined portion J24 of the metal member 201 and the first tab member 204, and a temporary joining step of joining the joined part J21 of the joined member 201; To form a preliminary hole at a start position of friction stirring in the second tab member joining step of joining the joined portion J25 of the joined metal member 201 and the second tab member 205 and the third main joining step; A preliminary hole forming step is provided.

In the first tab member joining step, friction stirring is performed on the butt portion J24 of the first tab member 204 and the metal member 201 to be joined. Specifically, the butt part is set by setting a route of friction stirring on the joint (boundary line) of the metal member 201 and the first tab member 204 to be relatively moved along the route. Friction stirring is performed for (J24). In addition, in this embodiment, friction stirring is performed continuously from the time point n1 of the 1st tap material joining process to the end point n2, without leaving the small rotating tool F in the middle.

When the small rotation tool F reaches the end point n2, the small rotation tool F is once made to enter the 1st tab material 204 side, and friction stirring is performed to the starting point n3 of a temporary joining process. When the small rotary tool F reaches the starting point n3, the temporary joining step is performed along the butt portion J21 without detaching the small rotary tool F. Since the butt | matching part J21 in this embodiment consists of planar linear L1, L2, L3, it carries out friction stir by moving the small rotating tool F, changing a direction by 90 degrees with respect to refraction point C1, C2. Is done.

When the small rotary tool F reaches the starting point n6, the small rotary tool F is once moved to the second tab member 205 side without detaching the small rotary tool F, and moved to the starting point n7 of the second tab member joining step. When the small rotary tool F reaches the time point n7, friction stirring is performed along the butt portion J205 to the end point n8. When the small rotating tool reaches n8, the small rotating tool F is made to enter the second tab member 205 side, and the small rotating tool F is released from the end position E _P3 . In addition, the end position E _P3 becomes the start position S _M3 of the 3rd main joining process mentioned later.

In a preliminary hole formation process, it is a process of forming a preliminary hole in the starting position of friction stirring in a 3rd main joining process. In the preliminary hole forming step according to the present embodiment, a preliminary hole is formed in S _M3 set on the surface of the second tab material 5. In the preliminary hole forming step, since it is substantially equivalent to the above-mentioned form, detailed description is abbreviate | omitted.

(7) Third bone bonding step

The 3rd present joining process is a process of fully joining the butt | matching part J21 in the 1st side surface C of the to-be-joined metal member 201. In the 3rd present joining process which concerns on this embodiment, it uses the large rotation tool G, and it frictions from the 1st side surface C of the to-be-joined metal member 201 with respect to the butt | matching part J21 of the temporarily joined state. Stirring is performed.

In the 3rd main joining process, as shown in FIG. 24, the stirring pin G2 of the large rotating tool G rotated left to the starting position S _M3 is inserted (press-in), and the inserted stirring pin G2 is inserted. Move to the end position E _M3 without deviating in the middle. That is, in the 3rd main joining process, friction stirring is started from the preliminary hole (not shown) set in the start position S _M3 of the 2nd tab material 5, and is the end position E _M3 set in the 1st tap material 204. Friction stirring is performed continuously up to).

In addition, in this embodiment, although the start position S _M3 of friction stirring is provided in the 2nd tab material 205 and the end position E _M3 is provided in the 1st tap material 204, the start position S _M3 . It is not intended to limit the positions of the and end positions E _M3 .

In the 3rd present joining process, as shown in FIG. 24, the large rotating tool G is located just above the starting position S _M3 , and it continues descending while rotating the large rotating tool G to the right, and stirring pin G2 is carried out. ) Is inserted into a spare hole (not shown). When the whole of the stirring pin G2 enters the 2nd tap material 205, and the whole surface of the lower end surface G11 of the shoulder part G1 contacts the surface of the 2nd tap material 205, while carrying out friction stirring, The large rotating tool G is relatively moved toward the starting point n6 of the abutting portion J21 of the metal member 201 to be joined, and is driven into the abutting portion J21. When the large rotary tool G is moved, the metal around the stirring pin G2 is plastically fluidized in sequence, and at the position spaced apart from the stirring pin G2, the metal that has been plastically fluidized is cured again and small. A formation region (hereinafter, referred to as "first side side plasticization region W23") is formed.

Since the butt | matching part J21 in this embodiment consists of planar linear L1, L2, L3, it carries out friction stir by moving the large rotation tool G, changing a direction by 90 degrees from refraction point C2, C1. Is done. Then, when the large rotary tool G reaches the end position E _M3 through the starting point n3, the large rotary tool G is released from the end position E _M3 . According to the third main bonding step, the surface side plasticized region W21 and the back side plasticized region W22 (see FIG. 17) and the first side side plasticized region W3 overlap with each other, and the first side surface ( Friction stirring can be performed over the entire length of the butt | matching part J21 shown by C).

(8) fourth preliminary step

In a 4th preliminary process, as shown in FIG. 25, temporary joining is performed using the small rotating tool F with respect to the butt | matching part J21 shown by the 2nd side surface D of the to-be-joined metal member 201. FIG. The 4th preliminary process is a 1st tab material joining process, the provisional joining process of joining the butt | matching part J21 of the to-be-joined metal member 201, and the butt | matching part of the to-be-joined metal member 201 and the 2nd tab material 205. The 2nd tab material joining process which joins the butt | matching part J25 with J25, and the preliminary hole formation process which forms a preliminary hole in the starting position of the friction stirring in a 4th main joining process are provided.

In addition, since a 4th preliminary process is substantially the same as a 3rd preliminary process except having performed on the 2nd side surface D, detailed description is abbreviate | omitted.

(9) Fourth main bonding step

As shown in FIG. 25, a 4th present joining process is a process of fully joining the butt | matching part J21 in the 2nd side surface D of the to-be-joined metal member 201. As shown in FIG. In the 4th present joining process which concerns on this embodiment, friction is engaged from the 2nd side surface D of the to-be-joined metal member 201 with respect to the butt | matching part J21 of the temporarily joined state using the large rotating tool G. Stirring is performed.

In the 4th present joining process, as shown in FIG. 25, the stirring pin G2 of the large rotating tool G rotated to the starting position S _M4 was inserted (press-in), and the inserted stirring pin G2 was inserted. It moves to the end position E _M4 without deviating in the middle. That is, in the 4th present joining process, friction stirring is started from the preliminary hole (not shown) set in the starting position S _M4 of the 2nd tab material 205, and it is made to the 1st tab material 204 along the butt | matching part J21. Friction stirring is performed continuously to the set end position E _M4 . According to the 4th present joining process, the 2nd side surface side plasticization area | region W24 is formed in the 2nd side surface D of the to-be-joined metal member 201. FIG. Since the 4th main bonding process is substantially the same as a 3rd main bonding process except having performed on the 2nd side surface D, detailed description is abbreviate | omitted. In addition, when the 4th main joining process is complete | finished, a pair of tab material is cut out from the to-be-joined metal member 201. FIG.

According to the bonding method of this embodiment demonstrated above, as shown in FIG. 24 and FIG. 25, the 1st side side plasticization area | region W23 and the 2nd in the 1st side surface C and the 2nd side surface D are shown. Lateral side plasticization area | region W24 consists of planar linear L1, L2, L3. Thereby, since the sum of the extension distance of planar linear L1, L2, L3 becomes larger than the length of the thickness 1h of the to-be-joined metal member 201, the area | region of friction stirring can be ensured long. Therefore, the stress which acts on the junction part of the to-be-joined metal member 201 is disperse | distributed, and joining strength can be raised. In addition, according to the 3rd main bonding process and the 4th main bonding process, the surface side plasticization area | region W21 and the back side plasticization area | region W22, the 1st side side plasticization area | region W23, and the 2nd side surface side small area | region While the torch region W24 overlaps with each other, friction stirring can be performed over the entire length of the butt portion J21 shown in the first side surface C and the second side surface D. FIG. Thereby, the airtightness and watertightness of the to-be-joined metal member 201 can be improved.

Moreover, in the joining method in this embodiment, since the butt | matching part J21 was made into the combination of the straight line, shaping | molding of the butting surface becomes easy and the operation of friction stirring can be performed easily. In addition, in this embodiment, planar linear L1 and planar linear L2 are formed at 90 degrees in refraction point C1, and planar linear L2 and planar linear L3 at refraction point C2. ) Is formed at 90 degrees. Therefore, since the large rotary tool G which moves along the plane linearity of the butt | matching part J21 at the time of joining of friction stirring stops at the refraction points C1 and C2, the refraction points C1 and C2 In the above, frictional stirring for a longer time than that of other parts is performed. Thereby, in the refraction points C1 and C2, by performing friction stirring for a long time, it is possible to process without generating a bonding defect, and therefore the airtightness and water tightness in a junction part improve.

In addition, in 4th Embodiment, since the rotation tool G for this bonding is rotated right by the 1st bone bonding process and the 2nd bone bonding process, the surface side plasticization area | region W21 and the back surface plasticization area | region W22 are There is a possibility that a cavity defect (not shown) is formed on the side of the second metal member 201b. Therefore, the 2nd metal member 201b side is friction-stirred at a comparatively high density by moving the 3rd main joining process to the left to rotate the main joining rotation tool G from the back surface B to the surface A. FIG. Moreover, the 2nd metal member 201b side is friction-stirred at a comparatively high density by moving the 4th main bonding process to the right by rotating this main rotation tool G to the back surface A from the surface B. As shown in FIG. Thereby, the cavity defect which may be formed in a 1st main bonding process and a 2nd main bonding process can be reliably divided.

Moreover, by using a tab material, a 1st bone bonding process, a 2nd bone bonding process, a 3rd bone bonding process, and a 4th bone bonding process can be performed correctly and quickly. In addition, by temporarily joining each tab member and the metal member 201 to be joined, an opening part at the time of performing the first bone bonding step, the second bone bonding step, the third bone bonding step and the fourth bone bonding step can be prevented. .

In addition, in this embodiment, although the side bone bonding process was performed to both the 1st side surface C and the 2nd side surface D, it does not necessarily need to be performed on both surfaces, and it is good to carry out at least either one.

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

For example, the butt | matching part J21 shown in the 1st side surface C and the 2nd side surface D is not limited to the planar linear form of 4th Embodiment, What is necessary is just to set suitably. That is, in the fourth embodiment, the planar linearity of the butt portion J21 is formed by the butt portion J21 formed by the combination of the three planar linear lines L1, L2, L3 and the two refraction points C1, C2. Although the extension distance of was set to become larger than the thickness 1h of the to-be-joined metal member 201, the shape of the butt | matching part J21 is not limited to what was shown by the said embodiment, It can set suitably.

It is a top view of the 1st side surface C which shows the modification which concerns on embodiment of this invention, (a) is a 1st modification, (b) is a 2nd modification, and (c) is a 3rd modification. An example is shown.

For example, as shown in Fig. 26A, the abutting portion J22 is disposed to be inclined with respect to the thickness direction of the to-be-joined metal member 201 ', whereby the to-be-joined metal member is not formed without forming a refractive point. It is good also as the butt | matching part J22 by which the extension distance of the planar linear L larger than the thickness 1h of 201 was ensured. According to such butting part J22, since the extension distance of the planar linear L which performs friction stirring is longer than the thickness 1h of the to-be-joined metal member 201, the distance of friction stirring can be ensured long, Bonding strength can be raised.

In addition, like the abutment parts J23 and J24 shown in FIG. 26 (b) or FIG. 26 (c), two planar linear lines L1 and L2 and one refracting point C1 are combined. You may also According to this structure, since the movement of the large rotating tool G is stopped once in the refraction point C1, it becomes possible to reliably perform friction stirring similarly to what was shown by the said embodiment. In this case, the angle of the inner angle of the refraction point C1 is not limited, but may be appropriately set.

27 is a plan view of a first side surface C showing a modification according to the embodiment of the present invention, (a) is a fourth modification, (b) is a fifth modification, and (c) is a sixth modification Yes, (d) shows a seventh modification.

In the fourth embodiment, two refracting points C1 and C2 are formed at right angles at which the plane linear L1 and L2 or the planar linear L2 and L3 intersect, but the refraction points C1 and C2 The angle of is not limited. For example, like the abutment portions J25 and J26 shown in Figs. 27A and 27B, planar linear L1 and L2 at two inflection points C1 'and C2'. ) Or the angle at which the planar linears L2 and L3 intersect, for example, can achieve the same effect.

In addition, the number of refraction points in the planar alignment of the butt portion may be formed at two or more positions, and may be appropriately set. For example, like the butt | matching part J27 shown to FIG. 27C, and the butt | matching part J28 shown to FIG. 27D, the number of refraction points C is four or six places. You may make it. In this way, by increasing the number of refraction points, the moving speed of the large rotary tool G is slowed down or the movement of the large rotary tool G is stopped a plurality of times, so that the joined metal member 201 'is more reliably. May be bonded to each other to perform bonding excellent in bonding strength, airtightness, and watertightness.

FIG. 28: is a top view of the 1st side surface C which shows the modification which concerns on embodiment of this invention, and shows an 8th modification.

In the fourth embodiment, the butt portion J21 is formed by a combination of three planar linears L1, L2, and L3, but the butt portion J8 is similar to the butt portion J8 shown in FIG. May be formed in a curved shape. By forming the shape of the butt | matching part J8 in this way, it is possible to make a planar linear extension distance longer than the thickness 1h of the to-be-joined metal member 201. Incidentally, in the case of forming the surface linearity of the butt portion in a curved shape, the curved line formed is not limited to the curve linearity of the butt portion J28 shown in FIG.

In addition, in the friction stirring in the present embodiment, the first tab member and the second tab member may be disposed as necessary, and may be omitted. In addition, the fixing method of a metal member at the time of friction stirring is not limited, What is necessary is just to select from well-known means suitably. In addition, in this embodiment, although the side bone bonding process performed friction stirring continuously, if the extension distance of the plasticization area | region formed by the side bone bonding process becomes larger than the thickness dimension of a to-be-joined metal member, it performs intermittently. Also good.

1: metal member to be joined
1a: first metal member
1b: second metal member
2: 1st tap material
3: 2nd tap material
201: metal member to be joined
201a: first metal member
201b: second metal member
202: first tab member
203: second tab member
A: surface
B: If
C: first side
D: second side
F: Rotational tool for temporary welding
G: Rotation tool for bone joining
J: Butt
L: Plane Linear
P1: spare hole
V ₁ to V ₄ : Progress direction of the rotation tool
W: plasticization zone
S _M : Starting position of the present bonding process
E _M : End position of this bonding process

Claims (13)

It is a joining method which performs friction stirring by moving a rotating tool with respect to the to-be-joined metal member which the 1st metal member and the 2nd metal member joined,
A first main joining step of performing friction stir from the surface side of the joined metal member to abutting portions of the first metal member and the second metal member;
A second main bonding step of performing friction stir from the rear surface side of the joined metal member with respect to the butt portion;
A side bone joining step of performing friction stir from the side surface of the joined metal member with respect to the butt portion;
Before performing the at least one bone bonding step of the first bone bonding step, the second bone bonding step and the side bone bonding step, a pair of tab members are disposed on both sides of the butt portion, and the tab member and the to-be-joined joint are arranged. A welding step of welding and temporarily joining the inner corner portions formed by the metal members;
And a preliminary step of preliminarily performing friction stir at the butt portion of the tab member and the joined metal member after the welding step,
The bonding method formed by overlapping the plasticization area | region formed in the said 1st bone bonding process and the 2nd bone bonding process, and the plasticization area | region formed in the said side bone bonding process. It is a joining method which performs friction stirring by moving a rotating tool with respect to the to-be-joined metal member which the 1st metal member and the 2nd metal member joined,
A first main joining step of performing friction stir from the surface side of the joined metal member to abutting portions of the first metal member and the second metal member;
A second main bonding step of performing friction stir from the rear surface side of the joined metal member with respect to the butt portion;
A side bone joining step of performing friction stir from the side surface of the joined metal member with respect to the butt portion;
And a provisional bonding step of temporarily bonding the butt portion before performing the at least one bone bonding step of the first bone bonding step, the second bone bonding step, and the side bone bonding step,
In the one main joining step, the punching hole formed when the temporary joining rotary tool used in the temporary joining step is released, is expanded in diameter with a drill or the like, and the stirring pin is inserted into the main joining rotary tool. I use it as a spare hole,
The bonding method formed by overlapping the plasticization area | region formed in the said 1st bone bonding process and the 2nd bone bonding process, and the plasticization area | region formed in the said side bone bonding process. It is a joining method which performs friction stirring by moving a rotating tool with respect to the to-be-joined metal member which the 1st metal member and the 2nd metal member joined,
A first main joining step of performing friction stir from the surface side of the joined metal member to abutting portions of the first metal member and the second metal member;
A second main bonding step of performing friction stir from the rear surface side of the joined metal member with respect to the butt portion;
A side bone joining step of performing friction stir from the side surface of the joined metal member with respect to the butt portion;
A third main joining step of performing friction stir from one side surface of the joined metal member;
And a fourth main joining step of performing friction stir from the other side surface side of the joined metal member,
When the rotation direction of the said rotation tool in the said 1st-4th bonding process is the same direction,
The starting position of the friction stirring in the second main joining step is set on the end position side of the friction stirring in the first main joining step,
The starting position of the friction stirring in the third main joining step is either on the starting position side of the friction stirring in the first main joining step and on the starting position side of the friction stirring in the second main joining step. Set it up,
The starting position of the friction stirring in the fourth main bonding step is on the other side of the starting position side of the friction stirring in the first main bonding step and the starting position side of the friction stirring in the second main bonding step. Set it up,
The bonding method formed by overlapping the plasticization area | region formed in the said 1st bone bonding process and the 2nd bone bonding process, and the plasticization area | region formed in the said side bone bonding process. It is a joining method which performs friction stirring by moving a rotating tool with respect to the to-be-joined metal member which the 1st metal member and the 2nd metal member joined,
A first main joining step of performing friction stir from the surface side of the joined metal member to abutting portions of the first metal member and the second metal member;
A second main bonding step of performing friction stir from the rear surface side of the joined metal member with respect to the butt portion;
A side bone joining step of performing friction stir from the side surface of the joined metal member with respect to the butt portion;
A third main joining step of performing friction stir from one side surface of the joined metal member;
And a fourth main joining step of performing friction stir from the other side surface side of the joined metal member,
In the first main joining step, the rotation tool is rotated to the right, and the start position and end position of the friction stirring are set so that the first metal member is located on the right side in the advancing direction of the rotation tool,
In the second main joining step, when the rotation tool is rotated left and the start position and end position of the friction stirring are set such that the first metal member is positioned on the left side in the direction of travel of the rotation tool,
The third bone bonding step and the fourth bone bonding step are,
If the rotary tool is turned to the right, the start position and end position of the friction stir are set such that the first metal member is located on the left side in the direction of travel of the rotary tool,
If the rotary tool is to turn left, the start position and end position of the friction stir are set such that the first metal member is located on the right side in the direction of travel of the rotary tool,
The bonding method formed by overlapping the plasticization area | region formed in the said 1st bone bonding process and the 2nd bone bonding process, and the plasticization area | region formed in the said side bone bonding process. It is a joining method which performs friction stirring by moving a rotating tool with respect to the to-be-joined metal member which the 1st metal member and the 2nd metal member joined,
A first main joining step of performing friction stir from the surface side of the joined metal member to abutting portions of the first metal member and the second metal member;
A second main bonding step of performing friction stir from the rear surface side of the joined metal member with respect to the butt portion;
A side bone joining step of performing friction stir from the side surface of the joined metal member with respect to the butt portion;
A third main joining step of performing friction stir from one side surface of the joined metal member;
And a fourth main joining step of performing friction stir from the other side surface side of the joined metal member,
In the first main joining step, the rotation tool is rotated to the left and the start position and end position of the friction stirring are set so that the first metal member is located on the right side in the advancing direction of the rotation tool,
In the second main joining step, when the rotation tool is rotated to the right and the start position and end position of the friction stirring are set such that the first metal member is positioned on the left side in the advancing direction of the rotation tool,
The third bone bonding step and the fourth bone bonding step are,
If the rotary tool is turned to the right, the start position and end position of the friction stir are set such that the first metal member is positioned on the right side in the advancing direction of the rotary tool,
If the rotary tool is to turn left, the start position and end position of the friction stir are set so that the first metal member is located on the left side in the direction of travel of the rotary tool,
The bonding method formed by overlapping the plasticization area | region formed in the said 1st bone bonding process and the 2nd bone bonding process, and the plasticization area | region formed in the said side bone bonding process. The joining method according to claim 1, wherein a preliminary hole is formed in advance at an insertion scheduled position of the rotary tool. The joining method according to claim 1 or 2, wherein an extension distance of the plasticized region formed in the side bone bonding step is larger than a thickness dimension of the butt portion. The said side bone joining process of Claim 7 performs friction stirring over the full length of the said butt part shown in the side surface of the said to-be-joined metal member, The plasticization area | region formed in the said side bone joining process, and the said 1st bone joining A joining method, characterized by overlapping the plasticized region formed in the step and the second main joining step. The joining method according to claim 7, wherein the planar linearity of the butt portion appearing on the side surface of the joined metal member is a straight line or a combination of straight lines. The joining method according to claim 7, wherein at least one refracting point is formed in a planar linearity of the butt portion appearing on the side surface of the joined metal member. The joining method according to claim 10, wherein an angle at which straight lines constituting the inflection point intersect is 90 degrees. delete delete

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