JP5986756B2 - Friction stir welding equipment - Google Patents

Description

  The present invention relates to a friction stir welding apparatus that joins members by using a friction stir welding tool or repairs cracks or the like generated on the surface of the member.

  There is a friction stir welding method as a crack repairing method for repairing a crack generated on the surface of a member. This friction stir welding method repairs cracks by using frictional heat such as heat generated between the tool and the workpiece and heat generated as a result of plastic flow from the deformed and mixed workpiece material. Is the method. The frictional heat generated here softens the workpiece materials and makes them possible to mix and repair cracks.

  In such a friction stir welding method, the crack is repaired by friction stir welding by rotating the rotary tool against the crack of the workpiece. In this case, a burr | flash generate | occur | produces in the repair part with the construction of friction stir welding on the surface. The burr generated around the repaired part may cause troubles of various devices during use of the workpiece. For this reason, the burrs must be removed with, for example, a grinder, and the work is troublesome.

  Therefore, it is considered to repair the crack by friction stir welding with a rotary tool and at the same time remove the burr. As such a friction stir welding apparatus, there is one described in Patent Documents 1 and 2 below. The friction stir welding tool described in Patent Literature 1 is a tool in which a cutting insert holder having a lower end cutting edge is rotatably supported on a rotating member by a rotating shaft. The region defined by can be cut. Moreover, the joining apparatus described in patent document 2 uses the welding tool for friction stir welding which has a rotatable probe, and embeds and moves the rotating probe of the joining tool in the butt | matching part of both joining members. Thus, the butt portion is friction stir welded, and the surface of the joint portion is cut with a planing tool.

Japanese Patent Laid-Open No. 10-071477 JP 2004-034141 A

  In general, the friction stir welding is controlled so that the pressing load of the tool is constant, and when the hardness changes depending on the heating state of the workpiece, the tool moves up and down, that is, the distance to the workpiece changes. In the conventional friction stir welding tool (Patent Document 1) described above, a cutting insert holder having a lower end cutting edge is supported on a rotating member, and the peripheral edge is cut by the cutting edge simultaneously with the cutting by the rotating member. Removes burrs. Therefore, when the rotating member moves up and down, the cutting blade also moves up and down, the cutting area by the cutting blade changes, and it becomes difficult to properly remove the generated burrs. Further, in the conventional joining device (Patent Document 2), since the cutting tool is used separately from the friction stir welding tool having a rotatable probe, not only the structure becomes complicated but also the control is performed. Becomes complicated. When the burrs removed by the cutting blades are scattered around, it becomes difficult to collect the scattered burrs.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and an object thereof is to provide a friction stir welding apparatus that enables high-precision friction stir welding work and simultaneously improves workability by performing burr removal work. To do.

  In order to achieve the above object, a friction stir welding apparatus according to the present invention is connected to a friction stir welding tool that is supported by the apparatus main body so as to be driven to rotate, and is integrally connected to the outer peripheral side of the friction stir welding tool. A rotating body, a cutting tool fixed at a position close to the friction stir welding tool in the rotating body, and a recovery unit for recovering a cut material cut by the cutting tool. It is.

  Accordingly, when the friction stir welding tool is moved in the horizontal direction in a state where the tool is rotated, the friction stir welding can be performed on the workpiece by the friction stir welding tool. At this time, since the rotating body integrally rotates together with the friction stir welding tool, the cutting tool fixed to the rotating body can cut and remove burrs and the like generated on the workpiece. Then, the cut object such as burrs cut and removed by the cutting tool can be prevented from being scattered by being collected by the collecting unit. As a result, highly accurate friction stir welding work can be performed, and workability can be improved by performing the burr removal work simultaneously with the friction stir welding work.

  In the friction stir welding apparatus according to the present invention, the recovery unit includes a recovery chamber provided in the rotating body, and a recovery hole that opens from the recovery chamber toward the workpiece member on the upstream side in the rotation direction of the cutting tool. It is characterized by having.

  Therefore, the cut material removed by cutting by the cutting tool enters the recovery chamber through the recovery hole and is recovered, and the cutting material such as burrs can be recovered early to prevent scattering.

  The friction stir welding apparatus of the present invention is characterized in that a recovery box for recovering the cut material cut by the cutting tool is provided below the rotating body on the outer peripheral side of the recovery chamber.

  Therefore, although the cut material removed by the cutting tool is collected in the collection chamber, a large cut material that cannot be collected in the collection chamber is collected in the collection box on the outside. Regardless, it can be collected properly.

  In the friction stir welding apparatus according to the present invention, the collection chamber and the collection box are provided with a collection portion through which fluid can pass and the cut material can be collected.

  Therefore, when the cutting tool is collected in the collection box, the surrounding fluid passes through the collection part and is discharged, while only the cut object is collected in the collection part. Re-scattering can be prevented.

  In the friction stir welding apparatus according to the present invention, the rotating body is connected to the friction stir welding tool so as to be integrally rotatable, and is connected to the first rotating body so as to be integrally rotatable and a rotation shaft. A second rotating body that is movably connected along a center direction and to which the cutting tool is fixed, and the cutting tool approaches the workpiece with respect to the first rotating body. An urging member for urging in the direction is provided.

  Therefore, when the friction stir welding tool moves in the horizontal direction in the driven rotation state and the friction stir welding tool performs friction stir welding on the workpiece, the first rotating body and the friction stir welding tool are used. When the second rotating body rotates integrally, the cutting tool fixed to the second rotating body can cut and remove burrs and the like generated on the workpiece. At this time, even if the friction stir welding tool moves in the axial direction according to the machining state of the workpiece, the friction stir welding tool moves relative to the second rotating body according to the urging force of the urging member. The two-rotary body does not move, and the burrs and the like can be appropriately removed without changing the position of the cutting tool.

  In the friction stir welding apparatus according to the present invention, a cutting tool positioning member that contacts the workpiece and defines a position of the cutting tool relative to the workpiece is provided on the second rotating body.

  Therefore, when the friction stir welding of the workpiece by the friction stir welding tool, the cutting tool positioning member comes into contact with the workpiece, so that the position of the cutting tool is properly defined with respect to the workpiece. High-precision deburring work can be performed.

  In the friction stir welding apparatus according to the present invention, a guide frame body connected to the outer peripheral portion of the second rotating body so as to be relatively rotatable is provided, the cutting tool positioning member is provided on the guide frame body, and the apparatus main body A connecting member for connecting the guide frame body so as not to rotate in the circumferential direction of the friction stir welding tool and to be movable in the axial direction is provided, and the recovery box is fixed to the guide frame body It is characterized by.

  Therefore, when the workpieces are friction stir welded by the friction stir welding tool, the connecting member makes the guide frame non-rotatable, so that the cutting tool positioning member provided on the guide frame does not rotate and the cutting is performed. Since the tool positioning member is always in contact with the workpiece, the position of the cutting tool relative to the workpiece can be properly defined, and the collection box provided on the guide frame does not rotate. Objects can be collected with high accuracy.

  According to the friction stir welding apparatus of the present invention, the friction stir welding tool, the rotating body connected to the friction stir welding tool so as to rotate integrally therewith, and the friction stir welding tool in the rotating body are fixed at positions close to each other. Since the cutting tool and the recovery unit for recovering the cut material cut by the cutting tool are provided, high-precision friction stir welding work can be performed, and at the same time, the burr removal work and burr recovery can be performed. The workability can be improved by performing the work.

FIG. 1 is a schematic view of a friction stir welding apparatus according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the friction stir welding apparatus according to the first embodiment. FIG. 3 is a bottom view of the friction stir welding apparatus according to the first embodiment. FIG. 4 is a rear view in which the recovery box in the friction stir welding apparatus of Example 1 is mounted. 5 is a cross-sectional view of the friction stir welding apparatus according to the first embodiment in which a recovery box is mounted. 6 is a bottom view of the friction stir welding apparatus according to the first embodiment with a collection box attached thereto. FIG. 7 is a schematic view of a friction stir welding apparatus according to Embodiment 2 of the present invention.

  Exemplary embodiments of a friction stir welding apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

  1 is a schematic view of a friction stir welding apparatus according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of the friction stir welding apparatus according to the first embodiment, and FIG. 3 is a bottom view of the friction stir welding apparatus according to the first embodiment. FIG. 4 is a rear view in which the recovery box in the friction stir welding apparatus of Example 1 is mounted, FIG. 5 is a cross-sectional view in which the recovery box in the friction stir welding apparatus in Example 1 is mounted, and FIG. It is a bottom view with which the collection box in the friction stir welding apparatus of Example 1 was equipped.

In the friction stir welding apparatus of the first embodiment, as shown in FIGS. 1 to 3, the apparatus main body 11 has a drive shaft 12 and can be driven and rotated by a motor (not shown). The drive shaft 12 is
A friction stir welding tool 13 is attached to the front end (lower end). 1 to 3 show a friction stir welding apparatus from which a collection box 35 to be described later is removed.

  The friction stir welding tool 13 is composed of a rotating shaft 14 and a head portion 15 formed integrally with the tip (lower end) of the rotating shaft 14, and the head 15 is formed on the tip side. It protrudes while inclining, and a scroll groove (not shown) is formed on the lower surface. The drive shaft 12 of the apparatus main body 11 has a chuck portion 16 connected to the tip portion, and the chuck portion 16 is fitted with the rotary shaft 14 of the friction stir welding tool 13 and is integrally rotated by the connecting shaft 16a. Connected as possible.

  The first rotating body (rotating body) 17 has a ring shape, is fitted to the outer peripheral portion of the chuck portion 16, and a key 18 is interposed between the first rotating body 17 and the first rotating body 17. 16, that is, coupled to the friction stir welding tool 13 so as to be integrally rotatable and integrally movable in the axial direction. The second rotating body (rotating body) 19 has a ring shape like the first rotating body 17 and is disposed below the first rotating body 17, and the outer peripheral portion of the head portion 15 in the friction stir welding tool 13. Is fitted. The first rotating body 17 has a plurality of (four in this embodiment) guide shafts 20 extending downward at substantially equal intervals in the circumferential direction. On the other hand, a plurality of (four in this embodiment) guide holes 21 are formed at substantially equal intervals in the circumferential direction of the second rotating body 19, and each guide shaft 20 of the first rotating body 17 is a second rotating body. 19 guide holes 21 are inserted. Therefore, the second rotating body 19 is connected to the first rotating body 17 by a plurality of guide shafts 20 and guide holes 21 so as to be integrally rotatable, and is connected to be relatively movable along the axial direction of the drive shaft 12. Will be.

  The first rotator 17 has a plurality (four in this embodiment) of storage holes 22 formed on the lower surface thereof at substantially equal intervals in the circumferential direction. The second rotator 19 is formed in each of the storage holes 22. The disc springs (biasing members) 23 for pressing are respectively accommodated. The second rotating body 19 is formed with two fan-shaped concave portions 24 formed in the lower portion, and the concave portions 24 are equally spaced in the circumferential direction on the outer peripheral side of the head portion 15 in the friction stir welding tool 13 (line Symmetrically), opened downward and opened to the head portion 15 side. And the cutting tool 26 is being fixed by the attachment head 25 in each recessed part 24 by the substantially equal space | interval (line symmetry) in the circumferential direction. Each cutting tool 26 is disposed in the vicinity of the outer peripheral surface of the head portion 15 in the friction stir welding tool 13, and a cutting blade for removing the burr B generated on the workpiece 10 is formed at the lower end. .

  Therefore, the second rotating body 19 is biased and supported downward with respect to the first rotating body 17 by the biasing force of each disc spring 23, and each cutting tool 26 mounted on the second rotating body 19 is supported. The urging is performed in a direction approaching the surface 10 a of the workpiece 10, that is, each cutting tool 26 is pressed against the surface 10 a of the workpiece 10.

  In addition, in this Example 1, although the two cutting tools 26 were provided in the 2nd rotary body 19, the number is not limited to two, One or three or more may be sufficient.

  Further, the second rotating body 19 is mounted on the outer peripheral surface so as to be relatively rotatable from the guide frame body 28 by a bearing 27 and immovable in the axial direction. A guide roller 30 is attached by 29. Each guide roller 30 is in contact with the surface 10a of the workpiece 10 and can roll. That is, each guide roller 30 functions as a cutting tool positioning member that defines the position of the cutting tool 26 with respect to the workpiece 10.

  And the connection member 31 is arrange | positioned along the axial center direction of the friction stir welding tool 13 in the outer peripheral side of each rotary body 17 and 19 or the guide frame body 28, and this connection member 31 has one end part (upper end). Part) is fixed to the apparatus main body 11, and the other end part (lower end part) is engaged with a guide groove 32 formed on the side part of the guide frame body 28. Therefore, since the connecting member 31 extending from the apparatus main body 11 is engaged with the guide groove 32, the guide frame body 28 does not rotate with each rotating body 17, 19. In the guide frame 28, the guide groove 32 is formed along the axial direction of the friction stir welding tool 13, the stopper 32a is formed on the upper side, and the lower side is opened. 19, the friction stir welding tool 13 can move along the axial direction, and the downward movement amount is restricted.

  Moreover, the friction stir welding apparatus of Example 1 is provided with the collection | recovery part which collect | recovers cuttings, such as the burr | flash B removed by the cutting tool 26, as shown in FIGS. 3-6. That is, the second rotating body 19 has two fan-shaped recesses 24 formed in the lower part, and the cutting tool 26 is fixed by the mounting head 25 in each recess 24. The ring-shaped cover 33 is fixed so as to cover the recess 24 on the lower surface of the second rotating body 19, and this recess 24 functions as a recovery chamber constituting the recovery unit. The cover 33 is formed with a recovery hole 34 that opens from the recovery chamber (concave portion) 24 toward the workpiece 10 on the upstream side in the rotation direction of the cutting tool 26. The collection chamber 24 has a collection portion 38 formed on the inner periphery thereof. Each of the collecting portions 38 can pass a fluid (water, molten metal, etc.), but collects a cutting object such as a burr B so that it cannot pass. For example, a mesh-like wire mesh In addition, the screen is not limited to a mesh-like wire mesh, and may be a screen or a porous body having a vertical slit or a horizontal slit. The cover 33 has a notch 33a formed in the inner peripheral portion so that each mounting head 25 and each cutting tool 26 protrude downward.

  Moreover, the collection box 35 is fixed so that the guide frame 28 may cover the outer peripheral part and the lower part. The recovery box 35 has a flat bottom surface and is notched at the corners so as to avoid the guide rollers 30, and has a frame shape in which the side portions are in close contact with the outer peripheral portion of the guide frame body 28. The bolt 36 is fixed to the guide frame 28. Further, the collection box 35 is formed with a circular opening 35a in which the cutting blade of each cutting tool 26 can protrude at the center of the lower surface portion.

  The collection box 35 has a predetermined gap through which the burr can pass between the upper surface of the lower surface portion and the lower surfaces of the second rotating body 19 and the guide frame body 28, and the lower surface of the lower surface portion and the workpiece 10. A predetermined gap is secured between the surface 10a and the entire surface 10a so as not to hinder the entire movement. And the collection | recovery box 35 has the collection part 37 formed in the back and each side of the moving direction of a friction stir welding apparatus. Each of the collecting portions 37 can pass a fluid (water, molten metal, etc.), but can collect a cut object such as a burr B so that it cannot pass through. For example, a mesh-like wire mesh In addition, the screen is not limited to a mesh-like wire mesh, and may be a screen or a porous body having a vertical slit or a horizontal slit.

  Therefore, when the drive shaft 12 of the apparatus main body 11 rotates, the rotational force is transmitted to the friction stir welding tool 13 via the chuck portion 16 to rotate. When the chuck portion 16 is rotated, the rotational force is transmitted to the first rotating body 17 via the key 18 and rotated, and is transmitted to the second rotating body 19 through the plurality of guide shafts 20 and the guide holes 21. Rotate. On the other hand, the guide frame body 28 has the bearing 27 interposed with respect to the second rotating body 19 and the connecting member 31 is engaged with the guide groove 32, and does not rotate together with the friction stir welding tool 13. Further, the second rotating body 19 is configured such that each guide roller 30 comes into contact with the surface 10 a of the workpiece 10 by the biasing force of the disc spring 23 provided between the second rotating body 17 and the second rotating body 19. Each cutting tool 26 fixed to 19 is positioned at an appropriate position with respect to the surface 10 a of the workpiece 10.

  In this state, when the apparatus main body 11 is moved horizontally in the welding direction, the friction stir welding tool 13 performs friction stir welding on the workpiece 10. At this time, the first rotating body 17 and the second rotating body 19 rotate together with the friction stir welding tool 13 so that the cutting tool 26 fixed to the second rotating body 19 is generated in the workpiece 10. Burr B is removed by cutting.

  By the way, the friction stir welding tool 13 is moved in the horizontal direction while being controlled so that the pressing force to the workpiece 10 becomes substantially constant while rotating. Here, the workpiece 10 is softened by increasing the temperature by frictional heat generated between the workpiece 10 and the friction stir welding tool 13. In this case, the hardness of the workpiece 10 changes according to the shape and the like due to the generated heat. Therefore, when the hardness of the workpiece 10 decreases, the friction stir welding tool 13 moves in a direction approaching the workpiece 10, that is, downward in the axial direction, and when the hardness of the workpiece 10 increases, It moves away from the workpiece 10, that is, upward in the axial direction.

  At this time, when the friction stir welding tool 13 moves in the axial direction according to the machining state of the workpiece 10, each guide roller 30 of the guide frame 28 connected to the outer peripheral portion of the second rotating body 19 Since the surface 10a of the workpiece 10 is rolled, the first rotary body 17 and the friction stir welding tool 13 do not move in the axial direction. It moves according to the biasing force. Therefore, the friction stir welding tool 13 can appropriately perform friction stir welding on the workpiece 10, and each cutting tool 26 can properly remove the burrs B.

  Further, when the apparatus main body 11 moves horizontally in the welding direction and the friction stir welding tool 13 rotates, the friction stir welding tool 13 performs friction stir welding on the workpiece 10, and the first rotating body When the cutting tool 26 rotates together with the 17 and the second rotating body 19, the cutting tool 26 cuts and removes the burrs B generated on the workpiece 10, and the removed burrs B are collected in the collection chamber 24 or the collection box 35. To be recovered.

  That is, when the rotating cutting tool 26 cuts and removes the burr B of the workpiece 10, the burr B broken from the workpiece 10 enters the collection chamber 24 through the collection hole 34 and is collected. At this time, the fluid taken into the collection chamber 24 together with the burrs B is discharged to the outside from the collecting section 38, while the burrs B are collected by the collecting section 38. In addition, the large burr B broken from the workpiece 10 may not be collected in the collection chamber 24 through the collection hole 34. In this case, the large burr B is collected from the opening 35a of the collection box 35 and the second rotating body 19 and the collection. It is collected in the collection box 35 (the gap between the guide frame 28 and the collection box 35) through the gap with the box 35. At this time, the fluid taken into the collection box 35 together with the burrs B is discharged to the outside from the respective collecting sections 37, while the burrs B are collected by the collecting sections 37. Further, since the burr B of the workpiece 10 is cut and removed while the cutting tool 26 rotates, the burrs B broken from the workpiece 10 scatter in the radial direction, so that each collecting portion 37 removes the burr B. Collect properly. Further, since the collecting part 37 is not provided on the front side of the collection box 35, there is no inflow of fluid from the front, and the collected burr B moves inside and is again discharged to the outside from the opening 35a. There is no scattering.

  As described above, in the friction stir welding apparatus according to the first embodiment, the friction stir welding tool 13 supported by the apparatus main body 11 so as to be driven to rotate and the friction stir welding tool 13 are connected to the outer peripheral side of the friction stir welding tool 13 so as to be integrally rotatable. The first rotating body 17, the second rotating body 19 connected to the first rotating body 17 so as to be integrally rotatable, and movably connected along the direction of the rotation axis, and the friction in the second rotating body 19 A cutting tool 26 fixed at a position close to the stir welding tool 13 and a disc spring 23 that urges the second rotating body 19 against the first rotating body 17 in a direction in which the cutting tool 26 approaches the workpiece 10. And a recovery chamber 24 provided in the second rotating body 19 for recovering a cut object such as a burr B cut by the cutting tool 26.

  Therefore, when the friction stir welding tool 13 is driven and rotated and moved in the horizontal direction, the friction stir welding tool 13 can perform friction stir welding on the workpiece 10. At this time, the first rotating body 17 and the second rotating body 19 rotate together with the friction stir welding tool 13 so that the cutting tool 26 fixed to the second rotating body 19 is generated on the workpiece 10. Can be removed by cutting. Then, the cut object such as the burrs B cut and removed by the cutting tool 26 can be prevented from being scattered by being collected in the collection chamber 24. As a result, highly accurate friction stir welding work can be performed, and workability can be improved by performing the burr removal work simultaneously with the friction stir welding work.

  Further, in the friction stir welding apparatus according to the first embodiment, the recovery chamber 24 is provided in the second rotating body 19 and opens from the recovery chamber 24 toward the workpiece 10 on the upstream side in the rotation direction of the cutting tool 26. A recovery hole 34 is provided. Accordingly, the cut material removed by the cutting tool 26 enters the collection chamber 24 through the collection hole 34 and is collected, and the cut material such as the burrs B can be collected early to prevent scattering.

  In the friction stir welding apparatus according to the first embodiment, a recovery box 35 for recovering the cut material cut by the cutting tool 26 is provided below the guide frame 28 on the outer peripheral side of the recovery chamber 24. Therefore, although the cut material cut and removed by the cutting tool 26 is collected in the collection chamber 24, a large cut material that cannot be collected in the collection chamber 24 is collected in a collection box outside the cut material. It can be properly collected regardless of size.

  In the friction stir welding apparatus according to the first embodiment, the collection chamber 24 and the collection box 35 are provided with collection portions 38 and 37 that allow fluid to pass and collect a cut material. Therefore, when the cutting tool 26 is collected in the collection box, the surrounding fluid is discharged through the collecting portions 38 and 37, while only the cut material is collected in the collecting portions 38 and 37. Thus, re-scattering of the collected cut material can be prevented.

  In the friction stir welding apparatus according to the first embodiment, the disc spring 23 that biases the second rotating body 19 in the direction in which the cutting tool 26 approaches the workpiece 10 with respect to the first rotating body 17 is provided. Therefore, even if the friction stir welding tool 13 moves in the axial direction according to the machining state of the workpiece 10, it moves relative to the second rotating body 19 according to the biasing force of the disc spring 23. The second rotating body 19 does not move, and the burr can be properly removed without changing the position of the cutting tool 26.

  In the friction stir welding apparatus according to the first embodiment, a cutting tool positioning member that contacts the workpiece 10 and defines the position of the cutting tool 26 with respect to the workpiece 10 is provided. Specifically, a guide frame body 28 is provided on the outer periphery of the second rotating body 19 so as to be relatively rotatable by a bearing 27, and a plurality of guide rollers 30 as cutting tool positioning members are provided on the guide frame body 28. The surface 10a is provided such that it can roll.

  Accordingly, when the work stirring member 10 is friction stir welded by the friction stir welding tool 13, the plurality of guide rollers 30 provided on the guide frame body 28 come into contact with the work member 10, so that the work member 10 is not touched. The position of the cutting tool 26 is appropriately defined, and the high-precision burr B removal operation can be performed. At this time, the plurality of guide rollers 30 provided on the guide frame body 28 do not rotate together with the second rotating body 19, and the plurality of guide rollers 30 are always in contact with the workpiece 10, and the workpiece The position of the cutting tool 26 with respect to 10 can be properly defined. Furthermore, by providing a plurality of guide rollers 30 as cutting tool positioning members, the friction stir welding tool 13 and the cutting tool 26 can be moved smoothly, and high-precision friction stir welding and removal of burrs B can be performed. it can.

  In the friction stir welding apparatus according to the first embodiment, the connecting member 31 that connects the guide frame 28 to the apparatus main body 11 so as not to rotate in the circumferential direction of the friction stir welding tool 13 and to be movable in the axial direction is provided. Provided. Therefore, since the connecting member 31 reliably disables the rotation of the guide frame 28, the friction stir welding tool 13 and the cutting tool 26 can be smoothly moved, and highly accurate friction stir welding and burr B removal can be achieved. It can be carried out.

  In the friction stir welding apparatus according to the first embodiment, the collection box 35 is fixed to the guide frame body 28. Therefore, since the collection box 35 does not rotate, the cut material can be collected with high accuracy.

  FIG. 7 is a schematic view of a friction stir welding apparatus according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the friction stir welding apparatus according to the second embodiment, as shown in FIG. 7, the friction stir welding tool 13 includes a rotation shaft 14 and a head portion 15, and the rotation shaft 14 is rotatably supported by the apparatus main body. The shaft is connected to the shaft through a chuck portion 16 so as to be integrally rotatable. The first rotating body 17 has a ring shape, is fitted to the outer peripheral portion of the chuck portion 16, can be integrally rotated by a key 18, and can be integrally moved in the axial direction. Similar to the first rotating body 17, the second rotating body 41 has a ring shape, is disposed below the first rotating body 17, and is fitted to the outer peripheral portion of the head portion 15 in the friction stir welding tool 13. ing. The second rotating body 41 is connected to the first rotating body 17 so as to be integrally rotatable by inserting the guide shaft 20 of the first rotating body 17 into the guide hole 42, and along the axial direction. They are linked so that they can move relative to each other.

  The first rotating body 17 has a housing hole 22 formed in the lower surface, and the disc springs 23 that press the second rotating body 41 are housed in the housing hole 22, respectively. The second rotating body 41 is formed with two fan-shaped recesses 43 in the lower portion, which are located on the outer peripheral side of the head portion 15 of the friction stir welding tool 13, and each of the recesses 43 has a cutting tool 44. Is installed. Each cutting tool 44 is disposed close to the outer peripheral surface of the head portion 15 in the friction stir welding tool 13, and a cutting edge is formed at the lower end.

  The second rotating body 41 is provided with guide rollers 45 on the left and right sides, respectively, and each guide roller 45 is in contact with the surface 10a of the workpiece 10 and is capable of rolling. That is, each guide roller 45 functions as a cutting tool positioning member that defines the position of the cutting tool 44 relative to the workpiece 10.

  In addition, the friction stir welding apparatus according to the second embodiment is provided with a collection unit that collects a cutting object such as a burr that has been cut and removed by the cutting tool 44. That is, in the second rotating body 41, two concave portions 43 having a fan shape are formed in the lower portion, and the cutting tool 44 is fixed in each concave portion 43. The ring-shaped cover 46 is fixed to the lower surface of the second rotating body 41 so as to cover the recess 43, and this recess 43 functions as a recovery chamber constituting the recovery unit. The cover 46 is formed with a recovery hole (not shown) that opens from the recovery chamber (concave portion) 43 toward the workpiece 10 on the upstream side in the rotation direction of the cutting tool 44. The collection chamber 43 has a collection portion 49 formed on the inner periphery thereof.

  Further, the recovery box 47 is fixed by a fixing bolt 48 so as to cover the outer peripheral portion and the lower portion of the second rotating body 41. The collection box 47 is formed with a circular opening 47a in which the cutting blade of each cutting tool 44 can project at the center of the lower surface portion. In addition, the recovery box 47 can collect fluid such as burrs B while passing through the fluid (water, molten metal, etc.) at the rear and each side of the friction stir welding apparatus in the moving direction. A collecting part (not shown) that is disabled is formed.

  Therefore, when the drive shaft of the apparatus main body rotates, the rotational force is transmitted to the friction stir welding tool 13 via the chuck portion 16 to rotate. Further, when the chuck portion 16 rotates, the rotational force is transmitted to the first rotating body 17 through the key 18 and rotated, and is transmitted to the second rotating body 41 through the plurality of guide shafts 20 and the guide holes 42. Rotate. Further, the second rotating body 41 is configured such that each guide roller 45 comes into contact with the surface 10 a of the workpiece 10 by the biasing force of the disc spring 23 provided between the second rotating body 17 and the second rotating body 41. Each cutting tool 26 fixed to 41 is positioned at an appropriate position with respect to the surface 10a of the workpiece 10.

  In this state, when the apparatus main body 11 is moved horizontally in the welding direction, the friction stir welding tool 13 performs friction stir welding on the workpiece 10. At this time, the first rotating body 17 and the second rotating body 41 are integrally rotated together with the friction stir welding tool 13 so that the cutting tool 44 fixed to the second rotating body 41 is generated in the workpiece 10. Burr B is removed by cutting.

  At this time, when the friction stir welding tool 13 moves in the axial direction according to the machining state of the workpiece 10, each guide roller 45 rotates the surface 10 a of the workpiece 10 while the second rotating body 41 rotates. Because of rolling, the first rotating body 17 and the friction stir welding tool 13 move according to the urging force of each disc spring 23 with respect to the second rotating body 41 without moving in the axial direction. . Therefore, the friction stir welding tool 13 can appropriately perform friction stir welding on the workpiece 10, and each cutting tool 44 can properly remove the burrs B.

  Further, when the apparatus main body 11 moves horizontally in the welding direction and the friction stir welding tool 13 rotates, the friction stir welding tool 13 performs friction stir welding on the workpiece 10, and the first rotating body When the cutting tool 44 rotates together with the 17 and the second rotating body 41, the cutting tool 44 cuts and removes the burrs B generated on the workpiece 10, and the removed burrs B are collected in the collection chamber 43 or the collection box 47. To be recovered.

  That is, when the rotating cutting tool 44 cuts and removes the burrs B of the workpiece 10, the burrs B broken from the workpiece 10 enter the collection chamber 43 through the collection holes and are collected. At this time, the fluid taken into the collection chamber 43 together with the burrs B is discharged to the outside from the collecting portion 49, while the burrs B are collected by the collecting portion 49. In addition, the large burr B that is broken from the workpiece 10 may not be collected in the collection chamber 43 through the collection hole. In this case, the large burr B is not removed from the opening 47a of the collection box 47 and the second rotating body 41 and the collection box. It is collected in this collection box 47 through a gap with 47. At this time, the fluid taken into the collection box 47 together with the burr B is discharged to the outside from the collecting unit, while the burr B is collected by the collecting unit.

  As described above, in the friction stir welding apparatus according to the second embodiment, the friction stir welding tool 13 supported by the apparatus main body 11 so as to be driven to rotate and the friction stir welding tool 13 are connected to the outer peripheral side of the friction stir welding tool 13 so as to be integrally rotatable. The first rotating body 17, the second rotating body 41 connected to the first rotating body 17 so as to be integrally rotatable and movable along the rotational axis direction, and the friction in the second rotating body 41. A cutting tool 44 fixed at a position close to the stir welding tool 13 and a disc spring 23 that urges the second rotating body 41 against the first rotating body 17 in a direction in which the cutting tool 44 approaches the workpiece 10. And a recovery chamber 43 provided in the second rotating body 41 for recovering a cut object such as a burr B cut by the cutting tool 44.

  Therefore, when the friction stir welding tool 13 is driven and rotated and moved in the horizontal direction, the friction stir welding tool 13 can perform friction stir welding on the workpiece 10. At this time, the first rotating body 17 and the second rotating body 41 rotate together with the friction stir welding tool 13 so that the cutting tool 44 fixed to the second rotating body 41 is generated on the workpiece 10. Can be removed by cutting. Then, the cut object such as the burrs B cut and removed by the cutting tool 44 can be prevented from being scattered by being collected in the collection chamber 43. As a result, highly accurate friction stir welding work can be performed, and workability can be improved by performing the burr removal work simultaneously with the friction stir welding work.

  Further, in the friction stir welding apparatus according to the second embodiment, a recovery box 47 that recovers the cut material cut by the cutting tool 44 is provided below the second rotating body 41 on the outer peripheral side of the recovery chamber 43. Therefore, although the cut material cut and removed by the cutting tool 44 is collected in the collection chamber 43, a large cut material that cannot be collected in the collection chamber 43 is collected in a collection box outside the cut material. It can be properly collected regardless of size.

  In the friction stir welding apparatus according to the second embodiment, a plurality of guide rollers 45 serving as a cutting tool positioning member that contacts the workpiece 10 and defines the position of the cutting tool 26 relative to the workpiece 10 are provided. Therefore, even if the friction stir welding tool 13 moves in the axial direction according to the machining state of the workpiece 10, the friction stir welding tool 13 moves relative to the second rotating body 41 according to the biasing force of the disc spring 23. The second rotating body 41 does not move, and the burr B can be appropriately removed without changing the position of the cutting tool 44.

  In each of the above-described embodiments, the rotating body of the present invention is configured by the first rotating body 17 and the second rotating bodies 19 and 41, but may be configured by a single rotating body. Moreover, although the cutting tool positioning member of the present invention is the guide rollers 30 and 45, the present invention is not limited to this configuration, and the cutting tools 26 and 44 are not provided as the cutting tool positioning member without providing the guide rollers 30 and 45. May be configured to function as a cutting tool positioning member. In this case, for example, three or more cutting tools 26 and 44 may be provided at equal intervals in the circumferential direction.

DESCRIPTION OF SYMBOLS 11 Apparatus body 12 Drive shaft 13 Friction stir welding tool 16 Chuck part 17 1st rotary body (rotary body)
19, 41 Second rotating body (rotating body)
20 Guide shaft 21 Guide hole 23 Disc spring (biasing member)
24, 43 Recess, collection chamber (collection section)
26, 44 Cutting tool 28 Guide frame 30, 45 Guide roller (Cutting tool positioning member)
31 connecting member 32 guide groove 34 recovery hole (recovery part)
35, 47 Collection box 37, 38, 49 Collection unit

Claims (7)

A friction stir welding tool supported by the apparatus main body so as to be driven to rotate;
A rotating body connected to the outer peripheral side of the friction stir welding tool so as to be integrally rotatable;
A cutting tool fixed at a position close to the friction stir welding tool in the rotating body;
A collecting unit that is provided on the rotating body and collects a cutting object cut by the cutting tool;
A friction stir welding apparatus comprising:   The said collection | recovery part has the collection | recovery chamber provided in the said rotary body, and the collection | recovery hole opened toward the to-be-processed member side from the said collection | recovery chamber in the upstream of the rotation direction of the said cutting tool, It is characterized by the above-mentioned. Item 2. The friction stir welding apparatus according to Item 1.   The friction stir welding apparatus according to claim 2, wherein a recovery box for recovering the cut material cut by the cutting tool is provided below the rotating body on the outer peripheral side of the recovery chamber.   The friction stir welding apparatus according to claim 3, wherein the collection chamber and the collection box are provided with a collection unit through which fluid can pass and the collection of the cut material.   The rotating body is connected to the friction stir welding tool so as to be integrally rotatable, and is connected to the first rotating body so as to be integrally rotatable, and is also movable so as to be movable along the rotational axis direction. And a second rotating body to which the cutting tool is fixed, and a biasing member that biases the second rotating body with respect to the first rotating body in a direction in which the cutting tool approaches the workpiece. The friction stir welding apparatus according to any one of claims 1 to 3, wherein the friction stir welding apparatus is provided.   6. The friction stir welding apparatus according to claim 5, wherein a cutting tool positioning member that contacts the workpiece and defines a position of the cutting tool with respect to the workpiece is provided in the second rotating body.   A guide frame body connected to the outer periphery of the second rotating body so as to be relatively rotatable is provided, the cutting tool positioning member is provided on the guide frame body, and the guide frame body is attached to the apparatus body. The connecting member that connects the friction stir welding tool so as not to rotate in the circumferential direction and to be movable in the axial direction is provided, and the collection box is fixed to the guide frame body. Friction stir welding equipment.

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