JP5096213B2 - Friction stir welding material - Google Patents

Description

  The present invention relates to a friction stir welding material that is joined by friction stir welding, and particularly to a friction stir welding material that can finish the surface smoothly without generating burrs on the surface of the joint portion.

  In order to reduce the heat input to the extruded shape and reduce the distortion generated in the extruded shape when joining the extruded shapes made of aluminum alloy, the friction stirrer disclosed in Patent Document 1 has recently been disclosed. Bonding is adopted. Such friction stir welding will be described with reference to FIG.

  FIG. 6 is a perspective view of conventional extruded shapes (friction stir welding materials) 510, 520 and the friction stir welding tool 100 made of an aluminum alloy. A state in which the joint surfaces 511 and 521 are friction stir welded is shown.

As shown in FIG. 6, in the friction stir welding, the joining surfaces 511 and 521 of the extruded shape members 510 and 520 are brought into contact with each other, and the upper and lower surfaces of the joining portions 500 of the joining surfaces 511 and 521 are connected to the pins of the friction stir welding tool 100. The stirring is performed by moving the stirring pin 103 provided coaxially with the pin tools 101 and 102 along the joining portion 500 while being sandwiched between the tools 101 and 102.
Japanese Patent No. 2792233

  However, since the extruded shape members 510 and 520 are long in the extrusion direction, they are deformed in a wavy shape in the extrusion direction, and at the time of friction stir welding, the portion to be friction stir welded on the upper and lower surfaces of the joint portion 500 However, since only the pin tools 101 and 102 hold, a relative level difference is generated on the joint surfaces 511 and 521 of the extruded shape members 510 and 520.

  As a result, if friction stir welding is performed in a state where relative steps are generated on the joint surfaces 511 and 521 of the extruded shape members 510 and 520, burrs are generated on the surface of the joint portion 500 after the friction stir welding. was there.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a friction stir welding material that can finish the surface smoothly without generating burrs on the surface of the joint portion. .

In order to achieve this object, the friction stir welding material according to claim 1 includes a first joining member having a first joining surface and a second joining surface having a second joining surface in contact with the first joining surface. And the first joint surface and the second joint surface are friction stir welded, and the first joint surface protrudes from the first joint surface of the first joint member. A plurality of first protrusions disposed in the thickness direction, and a plurality of first recesses recessed in the first bonding surface and disposed alternately with the first protrusions in the thickness direction of the first bonding member. The second joint surface protrudes from the second joint surface and is disposed in the thickness direction of the second joint member, and the first joint surface and the second joint surface are in contact with each other. A plurality of second protrusions that respectively engage with the plurality of first recesses, and a thickness of the second bonding member that is recessed in the second bonding surface. A plurality of second recesses that are alternately arranged with the second projections and that engage with the plurality of first projections when the first joint surface and the second joint surface contact each other. The plurality of first protrusions and the plurality of second protrusions are formed in substantially the same shape, and the plurality of first recesses and the plurality of second recesses are formed in substantially the same shape, Edges at both ends of the first joint surface in the thickness direction of the first joint member are set on a first imaginary line passing through substantially the center of the top part of the first convex part and the bottom part of the first concave part, and the second Edge portions of both ends of the joint surface in the thickness direction of the second joint member are set on a second imaginary line passing through substantially the center of the top of the second convex portion and the bottom of the second concave portion, and the first joint surface and Both ends of the first joining surface in the thickness direction of the first joining member when the second joining surface comes into contact The edge and the edge of both ends of the second joining surface in the thickness direction of the second joining member are in contact with each other, and the first imaginary line on the edges of both ends of the first joining surface and the second joining surface the second virtual line that matches.

The friction stir welding material according to claim 2 is the friction stir welding material according to claim 1, wherein the protruding amount of the top portion of the first convex portion is set smaller than the concave amount of the bottom portion of the second concave portion. The protruding amount of the top of the two convex portions is set to be smaller than the concave amount of the bottom of the first concave portion.

  According to the friction stir welding material of claim 1, the first joint surface of the first joint member and the second joint surface of the second joint member are brought into contact with each other, and the first joint surface and the second joint surface are brought into contact with each other. By holding the upper and lower surfaces of the joint part with the pin tool of the friction stir welding tool and rotating the stirring pin provided coaxially with the pin tool along the joint part, the first joint surface and the second joint surface are Friction stir welding.

  Here, according to the friction stir welding material according to claim 1, the first joint surface protrudes from the first joint surface and is disposed in the thickness direction of the first joint member; A plurality of first recesses that are recessed in the first bonding surface and are alternately arranged in the thickness direction of the first bonding member, and the second bonding surface protrudes from the second bonding surface. A plurality of second protrusions disposed in the thickness direction of the second bonding member and a plurality of second protrusions recessed in the second bonding surface and disposed alternately with the second protrusions in the thickness direction of the second bonding member. And a plurality of first concave portions and a plurality of second concave portions engage with each other when the first joint surface and the second joint surface contact each other, and the plurality of first concave portions, Since the plurality of second protrusions engage with each other, the relative level difference generated on the first joint surface and the second joint surface can be reduced, and the joint between the first joint surface and the second joint surface can be reduced. When the amount was friction stir welding, the surface of the anti-to junction that burrs are generated on the surface of the joint portion between the first joining surface and the second joint surface there is an effect that can be finished smoothly.

  That is, when the first joint surface and the second joint surface come into contact with each other, the plurality of first convex portions and the plurality of second concave portions are engaged with each other, and the plurality of first concave portions and the plurality of second convex portions are engaged. And the first joint surface and the second joint surface of the first joint member and the second joint member as compared with the case where the entire first joint surface (second joint surface) is flat. The contact is made in a positioned state without shifting in the thickness direction.

  Accordingly, the plurality of first convex portions and the plurality of second concave portions are engaged with each other, and the plurality of first concave portions and the plurality of second convex portions are engaged with each other, whereby the first joint surface and the second It is possible to reduce the relative level difference generated on the two joint surfaces.

  Therefore, even when only the upper and lower surfaces of the joint portion between the first joint surface and the second joint surface are clamped by the pin tool of the friction stir welding tool, the relative occurrence that occurs on the first joint surface and the second joint surface. The step can be reduced. Therefore, there is an effect that it is unnecessary to temporarily fix the first joint surface and the second joint surface when the joint portions of the first joint surface and the second joint surface are friction stir welded.

The second protrusion first convex portion more and more together when formed into substantially the same shape, a plurality of first recesses and a plurality of second recesses are formed in substantially the same shape, and the first joint surface When the second joint surface comes into contact, the first imaginary line passing through the approximate center of the top of the first protrusion and the bottom of the first recess and the approximate center of the top of the second protrusion and the bottom of the second recess Since the second imaginary line that passes through matches the edge in the thickness direction of the first joint surface set on the first imaginary line (or the edge in the thickness direction of the second joint surface set on the second imaginary line) ) Is detected by the sensor, and the internal pin is prevented from being generated between the first joint surface and the second joint surface by rotating the stirring pin of the rotary tool along these edges. There is an effect that can be.

That is, first convex portions and a plurality of second protrusions plurality of both Once formed into substantially the same shape, a plurality of first recesses and a plurality of second recesses are formed in substantially the same shape, and the first joint surface When the second bonding surface comes into contact, the first imaginary line passing through the approximate center of the top of the first convex part and the bottom of the first concave part passes through the approximate center of the top of the second convex part and the bottom of the second concave part. Since the second virtual line coincides with the edge in the thickness direction of the first joint surface set on the first virtual line and the edge in the thickness direction of the second joint surface set on the second virtual line. Touch. Therefore, the stirring pin rotates and moves along the edge in the thickness direction of the first joint surface set on the first imaginary line (or the edge in the thickness direction of the second joint surface set on the second imaginary line). Thus, the engaging portion between the first convex portion and the second concave portion and the engaging portion between the second convex portion and the first concave portion can be plastically flowed uniformly, and the first joint surface and the second joint surface It is possible to prevent internal defects from occurring between the two.

  In addition, when the edges at both ends in the thickness direction of the first joint surface are set on the first imaginary line and when the edges at both ends in the thickness direction of the second joint surface are set on the second imaginary line, the first What is necessary is just to detect either one of the edge part of the both ends of a joining member and a 2nd joining member with a sensor. Therefore, friction stir welding can be performed from both the front and back surfaces of the first bonding member and the second bonding member, and the workability of the friction stir welding can be improved.

According to the friction stir welding material according to claim 2 , in addition to the effect exhibited by the friction stir welding material according to claim 1, the protruding amount of the top portion of the first convex portion is smaller than the concave amount of the bottom portion of the second concave portion. Since the amount of protrusion at the top of the second convex portion is set to be smaller than the amount of recess at the bottom of the first concave portion, the thickness of the edge portion and the second joint surface in the thickness direction of the first contact surface is set. There is an effect that the edge in the direction can be brought into close contact.

  That is, the protruding amount of the top portion of the first convex portion (or the top portion of the second convex portion) is set smaller than the concave amount of the bottom portion of the second concave portion (or the bottom portion of the first concave portion). When the top part of the convex part (or the top part of the second convex part) and the bottom parts of the plurality of second concave parts (or the bottom parts of the first concave part) are moved and engaged in a direction close to each other, the first convex part (or The entirety of the second convex portion enters the second concave portion (or the first concave portion). Thereby, the edge part in the thickness direction of a 1st contact surface and the edge part in the thickness direction of a 2nd junction surface can be stuck firmly.

  As a result, there is an effect that internal defects can be prevented from occurring between the first joint surface and the second joint surface.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of the friction stir welding material 1 according to the first embodiment of the present invention. FIG. 1 (a) shows the friction before the first joining member 10 and the second joining member 20 are brought into contact with each other. FIG. 1B is a front view of the friction stir welding material 1 after the first joining member 10 and the second joining member 20 are brought into contact with each other. 1A and 1B, the first imaginary line X1 passing through the substantially center of the bottom 14a of the first recess 14 and the top 15a of the first projection 15 and the top of the second projection 25. 25a and the second imaginary line X2 passing through the approximate center of the bottom 24a of the second recess 24 are indicated by a two-dot chain line.

  First, the friction stir welding material 1 will be described with reference to FIG. The friction stir welding material 1 is formed of an extruded shape made of an aluminum alloy and, as shown in FIG. 1A, is mounted on a pedestal (not shown) and is friction stir welded by a friction stir welding tool 100 (see FIG. 2) described later. The first joining member 10 and the second joining member 20 are configured.

  The first bonding member 10 includes a first back surface 12 that contacts a pedestal (not shown), a first surface 11 that faces the first back surface 12, and a side surface that connects the first surface 11 and the first back surface 12. The first front surface 10a disposed on the front side (front side of the paper), the side surface connecting the first front surface 11 and the first back surface 12, and the rear surface (back side of the paper surface). 1 is a side surface connecting the back surface (not shown), the first surface 11 and the first back surface 12, and is disposed on the inner side (right side in FIG. 1A), and the first surface. 11 and a first front side edge 16 that is an edge that divides the first bonding surface 13, and a first back side edge 17 that is an edge that divides the first back surface 12 and the first bonding surface 13. Yes.

  The first bonding surface 13 is orthogonal to the first surface 11 and the first back surface 12, and is orthogonal to the first front end surface 13 a having the first front edge 16 as the upper edge, and the first surface 11 and the first back surface 12. The first back-side end face 13b having the first back-side edge 17 as a lower edge, and recessed in the thickness direction of the first joining member 10 (left-right direction in FIG. 1) and the front-rear direction of the first joining member 10 (FIG. 1). Three first recesses 14 extending in the depth direction from the front side of the paper, and protruding in the thickness direction of the first joining member 10 (left and right direction in FIG. 1) and the front and rear direction of the first joining member 10 (FIG. 1). And two first convex portions 15 extending in the depth direction from the front side of the drawing. The first concave portions 14 and the first convex portions 15 are alternately and continuously arranged. The first front-side end surface 13a and the first back-side end surface 13b are formed on a first imaginary line X1 that passes through the approximate center of the bottom 14a of the first recess 14 and the top 15a of the first projection 15.

  The first recess 14 is recessed outside (left side in FIG. 1) with respect to the plane including the first imaginary line X1, and is formed in a triangular shape having the bottom 14a as a vertex in front view. Further, the distance (the amount of depression of the bottom portion 14a of the first recess 14) in the width direction (the left-right direction in FIG. 1 (a)) of the first joining member 10 from the bottom portion 14a to the first front end surface 13a is set to L1. .

  The first convex portion 15 is provided on the inner side (right side in FIG. 1) with the plane including the first virtual line X1 as a reference, and is formed in a triangular shape having the apex portion 15a as a vertex in front view. Further, the distance in the width direction (the left-right direction in FIG. 1 (a)) of the first joining member 10 from the top portion 15a to the first front-side end surface 13a (the protruding amount of the top portion 15a of the first convex portion 15) is set to L2. ing. This L2 is set to be the same as L1, and the triangular shape of the first concave portion 14 and the triangular shape of the first convex portion 15 are formed in substantially the same shape.

  The second joining member 20 has a thickness direction (FIG. 1 (a) vertical direction), a width direction (FIG. 1 (a) left-right direction), and a length direction (FIG. 1 (a) from the front of the drawing. A second back surface 22 that is formed substantially the same in the back direction) and abuts against a pedestal (not shown), a second surface 21 that faces the second back surface 22, and the second surface 21 and the second back surface 22. A side surface connecting the second front surface 20a disposed on the front side (front side of the paper surface), the second surface 21 and the second back surface 22, and disposed on the rear side (back side of the paper surface). A second joining surface 23 disposed on the inner side (left side in FIG. 1A), which is a side surface connecting the second rear surface (not shown) to the second surface 21 and the second rear surface 22; A second front side edge portion 26 that is an edge that divides the second surface 21 and the second bonding surface 23, and an edge that divides the second back surface 22 and the second bonding surface 23. It is constituted by a second rear edge 27.

The second bonding surface 23 is orthogonal to the second surface 21 and the second back surface 22, and is orthogonal to the second front side end surface 23 a having the second front side edge portion 26 as an upper edge, and the second surface 21 and the second back surface 22. And a back end face 23b having the second back side edge 27 as a lower edge, and recessed in the thickness direction of the second joining member 20 and extending in the front-rear direction of the second joining member 20 (from the front to the back in FIG. 1). Two second protrusions 25 provided, and two protruding from the thickness direction of the second bonding member 20 and extending in the front-rear direction of the second bonding member 10 (from the front to the back of FIG. 1) The second recess 24 is provided. The 2nd recessed part 24 and the 2nd convex part 25 are alternately arrange | positioned continuously. The second front-side end surface 23a and the second back-side end surface 23b are formed on a second imaginary line X2 that passes through the approximate center of the top portion 25a of the second convex portion 25 and the bottom portion 24a of the second concave portion 24.

  The second convex portion 25 is provided so as to protrude inward (left side in FIG. 1) with respect to the plane including the second imaginary line X2, and is formed in a triangular shape having the apex 25a as a vertex in front view. Further, the distance in the width direction (left and right direction in FIG. 1 (a)) of the second bonding member 20 from the top portion 25a to the second front side end face 23a (the protruding amount of the top portion 25a of the second convex portion 25) is set to L3. ing.

  The second recess 24 is recessed outside (on the right side in FIG. 1) with respect to the plane including the second imaginary line X2, and is formed in a triangular shape having the bottom 24a as a vertex in front view. Further, the distance in the width direction (left-right direction in FIG. 1 (a)) of the second bonding member 20 from the bottom 24a to the second front-side end surface 23a (the amount of depression of the bottom 24a of the second recess 24) is set to L4. .

  This L4 is set to be the same as L3, and the triangular shape of the second concave portion 24 and the triangular shape of the second convex portion 25 are formed in substantially the same shape. L1, L2, L3, and L4 are set to be equal, and the triangular shape of the first convex portion 15 (second convex portion 25) and the triangular shape of the first concave portion 14 (second concave portion 24) are formed identically. Yes.

Prior to the friction stir welding, as shown in FIG. 1B, the first joining member 10 and the second joining member 20 are moved in directions close to each other, so that the first joining surface 13 and the second joining surface 23 are moved. , The first concave portion 14 (second concave portion 24) and the second convex portion 25 (first concave portion 14) are engaged, and the first virtual line X1 and the second virtual line X2 coincide with each other (first 1 second rear end face 23b of the first front end face 13a and the first rear end face 13b and the second joining surface 23 of the first bonding surface 13 together when the second front end surface 23a of the second joining surface 23 abuts the joining surface 13 On the first imaginary line X1 (second imaginary line X2), the first front edge 16 and the second front edge 26 abut on the first imaginary line X1 (second imaginary line X2). Thus, the first back side edge 17 and the second back side edge 27 abut.

  Next, with reference to FIG. 2, the process of carrying out the friction stir welding of the 1st joining member 10 and the 2nd joining member 20 using the friction stir welding tool 100 is demonstrated. FIG. 2 shows a state in which the first joint surface 13 and the second joint surface 23 are friction stir welded using the friction stir welding tool 100, and FIG. FIG. 2B is a front view of the friction stir welding material 1 after the second joint surface 23 is brought into contact and before the friction stir welding, and FIG. 2B is a diagram illustrating the first joint surface 13 and the second joint surface 23. FIG. 2C is a front view of the friction stir welding material 1 in the middle of the friction stir welding of the joint portion of FIG. 2, and FIG. 2C is a view of the joint portions of the first joint surface 13 and the second joint surface 23 being friction stir welded. It is a front view of the subsequent friction stir welding material 1.

  Before the friction stir welding material 1 is friction stir welded, as shown in FIG. 2A, when the first joining surface 13 and the second joining surface 23 are brought into contact with each other, the plurality of first recesses 14 and the plurality of first joining surfaces 1 While the two convex portions 25 are engaged, the plurality of first convex portions 15 and the plurality of second concave portions 24 are engaged, so that the first virtual line X1 and the second virtual line X2 coincide. The first front edge 16 set on the first virtual line X1 and the second front edge 26 set on the second virtual line X2 come into contact with each other and are set on the first virtual line X1. The 1st back side edge part 17 and the 2nd back side edge part 27 set on the 2nd virtual line X2 contact | abut. Thereafter, the center line Y of the stirring pin 103 of the friction stir welding tool 100 is set on the line of the first front edge 16 (second front edge 26), that is, on the first virtual line X1 (second virtual line X2). To do.

  Then, as shown in FIG. 2B, the front surfaces 11 and 21 and the back surfaces 12 and 22 of the joining portions of the first joining surface 13 and the second joining surface 23 are sandwiched by the pin tools 101 and 102, and the stirring pin 103 is inserted into the first The first joint surface 13 and the second joint surface 23 are disposed on the front surface 10a (20a) of the joint portion. The stirring pin 103 has a first front edge 16 (second front edge 26) set on a weld line detected by a sensor (not shown), that is, the first virtual line X1 (second virtual line X2). Along the line, the first joint member 10 and the second joint member 20 are rotationally moved from the front surface 10a (20a) side to the back surface (not shown) side (FIG. 2 (b) from the front side to the back side). As a result, the joining portions of the first joining surface 13 and the second joining surface 23 generate heat and are softened. Thus, as shown in FIG. 2C, the first joint surface 13 and the second joint surface 23 are fixed by the plastic material formed by plastic flow of the joint portions of the first joint surface 13 and the second joint surface 23. Phase joining is performed, and the joint portions of the first joint surface 13 and the second joint surface 23 are friction stir welded.

  Therefore, when the first joint surface 13 and the second joint surface 23 are brought into contact with each other, the first concave portion 14 (second concave portion 24) and the second convex portion 25 (first concave portion 14) engage with each other. Compared to the case where the entire bonding surface 13 (second bonding surface 23) is flat, the first bonding surface 13 and the second bonding surface 23 are displaced in the thickness direction of the first bonding member 10 and the second bonding member 20. It is possible to reduce the relative level difference generated on the first joint surface 13 and the second joint surface 23 by being in contact with each other without being positioned.

  Therefore, only the front surfaces 11 and 21 and the rear surfaces 12 and 22 of the joining portions of the first joining surface 13 and the second joining surface are merely sandwiched by the pin tools 101 and 102 (see FIG. 2) of the friction stir welding tool 100. Even in this case, it is possible to reduce the relative level difference generated on the first joint surface 13 and the second joint surface 23.

  Thus, since the relative level | step difference which generate | occur | produces in the 1st joining surface 13 and the 2nd joining surface 23 can be reduced, when the joining part of the 1st joining surface 13 and the 2nd joining surface 23 is friction stir welded, Further, burrs are prevented from being generated on the front surfaces 11 and 21 (back surfaces 12 and 22) of the bonding portions of the first bonding surface 13 and the second bonding surface 23, so that the front surfaces 11 and 21 (back surfaces 12 and 22) of the bonding portions are formed. Smooth finish.

  In addition, when the first concave portion 14 (second concave portion 24) and the second convex portion 25 (first concave portion 14) engage with each other, the first joint surface 13 and the second joint surface 23 become the first joint member 10. And the second joining member 20 are in contact with each other without being displaced in the thickness direction, so that the first joining surface is joined when the joined portions of the first joining surface 13 and the second joining surface 23 are friction stir welded. The operation | work etc. which temporarily fix 13 and the 2nd joining surface 23 can be made unnecessary.

Further, a plurality of first convex portions 15 and a plurality of second convex portions 25 are both Once formed into substantially the same shape, a plurality of first recesses 14 and the plurality of second recesses 24 is formed in a substantially same shape, the The first front edge 16 (second front edge 26) is set on the first virtual line X1 (second virtual line X2). Therefore, when the 1st joint surface 13 and the 2nd joint surface 23 contact | abut, the 1st virtual line X1 and the 2nd virtual line X2 correspond, and the 1st front side edge set on the 1st virtual line X1 The second front side edge 26 set on the part 16 and the second imaginary line X2 contacts and is set on the first back side edge 17 and the second imaginary line X2 set on the first imaginary line X1. The 2nd back side edge part 27 contact | abuts.

  Accordingly, when the stirring pin 103 rotates along the line of the first front side edge portion 16 (second front side edge portion 26) set on the first imaginary line X1, the first joint surface 13 and the second joint surface are moved. The joint portion of the surface, that is, the engaging portion between the first convex portion 15 and the second concave portion 24 and the engaging portion between the second convex portion 25 and the first concave portion 14 can be made to plastically flow evenly. An internal defect can be prevented from occurring between the surface 13 and the second bonding surface 23.

  In addition, the first front side edge portion 16 and the first back side edge portion 17 which are edge portions at both ends in the thickness direction of the first bonding surface 13 are set to the first imaginary line X1 and the thickness direction of the second bonding surface 23 is set. Since the 2nd front side edge part 26 and the 2nd back side edge part 27 which are the edges of both ends are set on the 2nd virtual line X2, when carrying out friction stir welding, the 1st back side edge part 17 ( The line of the second back side edge 27) of the second bonding member 20 may be detected by a sensor. Therefore, the friction stir welding can be performed from any of the front surfaces 11 and 21 and the back surfaces 12 and 22 of the first bonding member 10 and the second bonding member 20, and the workability of the friction stir welding can be improved.

  Next, the friction stir welding material 201 according to the second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a front view of the friction stir welding material 201 according to the second embodiment of the present invention, and FIG. 3A is a friction stir before the first joining member 210 and the second joining member 220 are brought into contact with each other. 3B is a front view of the bonding material 201, and FIG. 3B is a front view of the friction stir bonding material 201 after the first bonding member 210 and the second bonding member 220 are brought into contact with each other. Moreover, in FIG. 3, the 1st virtual line X1 and the 2nd virtual line X2 are shown with the dashed-two dotted line. In addition, the same code | symbol is attached | subjected to the part same as above-described 1st embodiment, and the description is abbreviate | omitted.

  In the friction stir welding material 1 according to the first embodiment, the first front side end face 13a and the first back side end face 13b are formed on the first imaginary line X1, and the second front side end face 23a and the second imaginary line X2 are formed. Whereas the second back-side end face 23b is formed, the friction stir welding material 201 in the second embodiment is first from the first imaginary line X1, as shown in FIGS. 3 (a) and 3 (b). A first front-side end surface 213a protrudes from the second bonding surface 223 side (right side in FIG. 3), and a first back-side end surface 213b protrudes from the first virtual line X1 toward the second bonding surface 223 side (right side in FIG. 3). The second front side end surface 223a engaging with the first front side end surface 213a is recessed on the outer side surface (not shown) side (right side in FIG. 3) of the second joining member 220 from the second imaginary line X2, and the first back side. A second back-side end surface 223b that engages with the end surface 213b is recessed.

The first front side end surface 213a and the first back side end surface 213b serve as guides, and the second convex portion 25 on the second surface 221 side (upper side in FIG. 3) and the second on the second rear surface 222 side (lower side in FIG. 3). The convex portions 25 can be easily engaged with the first concave portions 14, respectively. Therefore, the engagement operation between the first concave portion 14 and the second convex portion 25 can be easily performed.

Next, the friction stir welding material 301 in the third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a front view of the friction stir welding material 301 according to the third embodiment of the present invention, and FIG. 4A shows the friction before the first bonding member 310 and the second bonding member 320 are brought into contact with each other. FIG. 4B is a front view of the friction stir welding material 301 after the first joining member 310 and the second joining member 320 are brought into contact with each other. 4A and 4B, the third imaginary line X3 passing through the approximate center of the bottom 314a of the first recess 314 and the top 315a of the first projection 315, and the top of the second projection 325. The fourth imaginary line X4 passing through the approximate center of the bottom 324a of 325a and the second recess 324 is indicated by a two-dot chain line. A recess amount L5 of the bottom portion 314a of the first recess 314, a protrusion amount L6 of the top portion 315a of the first protrusion 315, a protrusion amount L7 of the top portion 325a of the second protrusion 325, and a bottom portion 324a of the second recess 324. Is set to be substantially the same.

In the friction stir welding material 1 according to the first embodiment, the first concave portion 14, the first convex portion 15, the second concave portion 24, and the second convex portion 25 are formed in a triangular shape, whereas FIG. ) And FIG. 4B, the friction stir welding material 301 in the third embodiment has a first concave portion 314, a first convex portion 315, a second convex portion 325, and a second concave portion 324 in a semicircular shape. Is formed.

In addition, the friction stir welding material 1 according to the first embodiment has the first front side end surface 13a and the first back side end surface 13b formed on the first imaginary line X1, and the second front side on the second imaginary line X2. Whereas the end face 23a and the second back side end face 23b are formed, the friction stir welding material 301 in the third embodiment has a first imaginary line as shown in FIGS. 4 (a) and 4 (b). from X3 second bonding surface 323 side together with the first front end surface 313a (FIG. 4 right) is projected, the first rear end face 313b on from the first imaginary line X1 second bonding surface 323 side (right side in FIG. 4) A second front side end surface 323a that protrudes from the second imaginary line X4 and engages with the first front side end surface 313a is recessed on the outer surface (not shown) side (right side in FIG. 4 ) of the second joining member 320. The second back side end surface 323b that engages with the first back side end surface 313b is recessed. To have.

Therefore, since the first concave portion 314, the first convex portion 315, the second convex portion 325, and the second concave portion 324 are formed in a semicircular shape, the first joining member 310 formed of an extruded shape member made of an aluminum alloy. And the type | mold of the 2nd joining member 320 can be formed easily.

Next, a friction stir welding material 401 according to the fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a front view of the friction stir welding material 401 according to the fourth embodiment of the present invention, and FIG. 5A shows the friction stir before the first bonding member 410 and the second bonding member 420 are brought into contact with each other. FIG. 5B is a front view of the friction stir welding material 401 after the first bonding member 410 and the second bonding member 420 are brought into contact with each other. In FIG. 5A and FIG. 5B, the first virtual line X5 and the second virtual line X6 are indicated by a two-dot chain line.

In the friction stir welding material 1 according to the first embodiment, the outer edges of the bottom 14a of the first recess 14, the top 15a of the first projection 15, the bottom 24a of the second recess 24, and the top 25a of the second projection 25 are acute angles. In contrast, in the friction stir welding material 401 according to the fourth embodiment, the outer edges of the top part 415a of the first convex part 415 and the top part 425a of the second convex part 425 are formed in an arc shape. .

Accordingly, the protruding amount L9 of the top portion 415a of the first convex portion 415 is set smaller than the concave amount L4 of the bottom portion 24a of the second concave portion 24, and the protruding amount L10 of the top portion 425a of the second convex portion 425 is set. Is set smaller than the dent amount L1 of the bottom 14a of the first recess 14. Accordingly, the top portions 415a of the plurality of first convex portions 415 (or the top portions 425a of the second convex portions 425) and the bottom portions 24a of the plurality of second concave portions 24 (or the bottom portions 14a of the first concave portions 14) are brought closer to each other. when the movement is allowed by engagement, the entire first projecting portion 415 (or the second convex portion 425) enters the inside of the second recess 24 (or the first recesses 14), the first front-side edge 16 (the first The back side edge 17 ) and the second front side edge 26 (second back side edge 27 ) can be reliably adhered.

Moreover, when the 1st front side edge part 16 (1st back side edge part 17 ) and the 2nd front side edge part 26 (2nd back side edge part 27 ) are closely_contact | adhered, the 1st front side end surface 13a and the 2nd front side end surface 23a will become. The first virtual line X5 and the fourth virtual line X6 always coincide with each other. Therefore, the whole of the first joint surface 413 and the second joint surface 423 can be simplified simply by engaging the first convex portion 415 (second convex portion 425) and the second concave portion 24 (first concave portion 14). It can be made to contact. As a result, it is possible to prevent internal defects from occurring between the first bonding surface 413 and the second bonding surface 423.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications and changes can be easily made without departing from the spirit of the present invention. Can be inferred.

  For example, in each embodiment of the present invention, the first concave portion 14 (second concave portion 24) and the first convex portion 15 (second convex portion 25) are provided on the first joint surface 13 (second joint surface 23). Although arranged alternately and continuously, the first surface 11 (second surface 21) and the first surface between the first concave portion 14 (second concave portion 24) and the first convex portion 15 (second convex portion 25). You may provide the horizontal surface part orthogonal to the back surface 12 (2nd back surface 22).

  The first joint surface 13 is alternately provided with three first recesses 14 that are recessed in the thickness direction of the first joint member 10 and the first recesses 14 that protrude in the thickness direction of the first joint member 10. Although the two first convex portions 15 to be disposed are provided, three second concave portions 24 and two first convex portions 15 may be provided on the second joint surface, and the first concave portion 14 and the first convex portion 15 may be provided. You may set the 1 convex part 15 to the same number. Further, the number of the first concave portions 14, the first convex portions 15, the first convex portions 15 that engage with the first concave portions 14, and the number of the second front side edge portions 26 that engage with the first convex portions 15 are the numbers of the respective embodiments of the present invention. It is not limited to the case, and any number may be used.

It is a front view of the friction stir welding material in the first embodiment of the present invention, (a) is a front view of the friction stir welding material before contacting the first joining member and the second joining member, (B) is a front view of the friction stir welding material after the first joining member and the second joining member are brought into contact with each other. (A) is a front view of the friction stir welding material after the first joint surface and the second joint surface are brought into contact and before friction stir welding, and (b) is a diagram illustrating the first joint surface and It is a front view of the friction stir welding material in the middle of the friction stir welding of the joint portion of the second joint surface, (c) after the joint portion of the first joint surface and the second joint surface is friction stir welded It is a front view of the friction stir welding material. It is a front view of the friction stir welding material in 2nd embodiment of this invention, (a) is a front view of the friction stir welding material before making a 1st joining member and a 2nd joining member contact, b) is a front view of the friction stir welding material after the first joining member and the second joining member are brought into contact with each other. It is a front view of the friction stir welding material in 3rd embodiment of this invention, (a) is a front view of the friction stir welding material before making a 1st joining member and a 2nd joining member contact, b) is a front view of the friction stir welding material after the first joining member and the second joining member are brought into contact with each other. It is a front view of the friction stir welding material in 4th embodiment of this invention, (a) is a front view of the friction stir welding material before making a 1st joining member and a 2nd joining member contact, ( b) is a front view of the friction stir welding material after the first joining member and the second joining member are brought into contact with each other. It is a perspective view of a conventional extruded shape member (friction stir welding material) and a friction stir welding tool made of aluminum alloy.

1, 201, 301, 401 Friction stir welding material 10, 210, 310, 410 First joining member 13, 213, 313, 413 First joining surface 14, 314 First recess 14a, 314a Bottom (bottom of first joining member )
15,315,415 1st convex part 15a, 315a, 415a Top part (top part of 1st joining member)
16, 216, 316, 416 First front side edge (edge in thickness direction of first joining member of first joining surface)
17, 217, 317, 417 First back side edge (edge in the thickness direction of the first bonding member of the first bonding surface)
20, 220, 320, 420 Second joint member 23, 223, 323, 423 Second joint surface 24, 324 Second recess 24a, 324a Bottom (bottom of second recess)
25, 325, 425 Second convex portion 25a, 325a, 425a Top portion (the top portion of the second convex portion)
26,226,326,426 Second front side edge (edge in the thickness direction of the second bonding member of the second bonding surface)
27, 227, 327, 427 second back side edge (edge in the thickness direction of the second bonding member of the second bonding surface)
X1 first virtual line X2 second virtual line X3 third virtual line (first virtual line)
X4 Fourth imaginary line (second imaginary line)

Claims (2)

A first joining member having a first joining surface; and a second joining member having a second joining surface abutting on the first joining surface, wherein the first joining surface and the second joining surface are in friction. In friction stir welding materials to be stir welded,
The first joint surface protrudes from the first joint surface and is disposed in the thickness direction of the first joint member;
A plurality of first recesses that are recessed in the first bonding surface and are arranged alternately with the first protrusions in the thickness direction of the first bonding member;
The second joint surface protrudes from the second joint surface and is disposed in the thickness direction of the second joint member, and when the first joint surface and the second joint surface are in contact with each other, A plurality of second convex portions respectively engaged with the first concave portions of
When the first joint surface and the second joint surface abut on the second joint surface and are alternately disposed with the second convex portions in the thickness direction of the second joint member. A plurality of second recesses respectively engaged with the plurality of first protrusions ,
The plurality of first protrusions and the plurality of second protrusions are formed in substantially the same shape, and the plurality of first recesses and the plurality of second recesses are formed in substantially the same shape,
Edges at both ends of the first joint surface in the thickness direction of the first joint member are set on a first imaginary line passing through substantially the center of the top part of the first convex part and the bottom part of the first concave part, and the second Edges at both ends of the joining surface in the thickness direction of the second joining member are set on a second imaginary line passing through substantially the center of the top of the second convex part and the bottom of the second concave part,
When the first joint surface and the second joint surface are in contact with each other, edges of both ends of the first joint surface in the thickness direction of the first joint member and the second joint member of the second joint surface contact with both end edge portions in the thickness direction of those, and features that you match the first joining surface and the second the first virtual line on the edge of both ends in the joint surface and said second imaginary line Friction stir welding material.   The amount of protrusion at the top of the first protrusion is set smaller than the amount of protrusion at the bottom of the second recess, and the amount of protrusion at the top of the second protrusion is the amount of recess at the bottom of the first recess. The friction stir welding material according to claim 1, wherein the friction stir welding material is set smaller.

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