JP2013132683A - Friction stir welding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a friction stir welding device capable of reducing non-joined parts at both ends in the longitudinal direction.SOLUTION: A friction stir welding device includes: a processing tool 6a; a pressurizing roller 7a disposed before the processing tool in the moving direction for pressurizing the abutting part 3a of a long planar member 3 from an upper surface side; an auxiliary roller 7b disposed before the pressurizing roller in the moving direction; a pressing jig 4 for pressing the long planar member abutted at both ends in the longitudinal direction of the long planar member altogether from the upper surface side; and a running-on jig 5 disposed near the pressing jig. The processing tool 6a, the pressurizing roller 7a and the auxiliary roller 7b are relatively moved integrally to the abutting part 3a, and when the processing tool 6a approaches the pressing jig 4, the auxiliary roller 7b gets on the running-on jig 5, and the pressurizing roller 7a is moved on the pressing jig without being in contact with the pressing jig 4.

Description

  The present invention relates to a friction stir welding apparatus that joins long plate-like members together.

  Friction stir welding (FSW) is a method in which the metal to be bonded is abutted and fixed, and a rotating processing tool (round bar) is pressed against the abutting part to bond the metal to be bonded. In the friction stir welding, when the rotating processing tool is pressed against the abutting portion, the metal to be joined at the abutting portion generates heat, the softened metal to be joined is plastically flowed, and the metals to be joined are solid-phase joined. Such friction stir welding is used, for example, for butt joining of hollow materials having a fitting structure as disclosed in Patent Document 1.

  In the friction stir welding, since the processing tool is moved while rotating, the metal in the butt portion is stirred up and down, and a force that shifts the butt portion of the metal to be joined is generated. For example, in the friction stir welding between the hollow members disclosed in Patent Document 1, a force is generated to open the groove, which is a butt portion of the hollow member, vertically and horizontally. Therefore, in order to prevent a step from occurring in the groove portion after joining, it is necessary to perform friction stir welding while fixing the abutting portions from the top, bottom, left and right after abutting the hollow materials.

  As an apparatus for fixing the abutting portion, for example, Patent Document 2 describes an apparatus that presses the abutting portion in the forward direction of the processing tool with a pressure roller. By using such a pressure roller, the butt portion is fixed, and it is possible to prevent a step from being generated in the groove portion after joining.

  On the other hand, when three or more long plate-like members are abutted side by side, and then a plurality of abutting portions are joined sequentially, the pressing position of the long plate-like member is changed for each abutting portion. Then work efficiency is bad. Accordingly, in order to join the working efficiency well, a holding jig 54 as shown in FIG. 5 is used, and the long plate members 53 are arranged side by side on the stage 52 so that both ends in the longitudinal direction of the long plate member 3 are aligned. Are pressed together from the upper surface side and fixed together, and then only the processing tool 56a is moved to join the butt portions 53a in sequence.

JP 2000-288750 A JP 2000-202645 A

  However, when the pressing jig 54 of FIG. 5 and the pressure roller of Patent Document 2 are used in combination, there is a gap between the pressure roller 67a and the processing tool 66a as shown in the schematic diagram of FIG. When the joining is advanced to the end of the long plate-like member 63, the pressure roller 67a hits the holding jig 64 before the processing tool 66a hits the holding jig 64, and the unbonded portion (unbonded portion 63c) becomes long. There is a problem that becomes. Since the unjoined portion 63c is cut and discarded after joining, in order to effectively use the long plate member 63, it is preferable to join the unjoined portion 63c so that the unjoined portion 63c becomes small.

  The following three methods are conceivable for reducing the unjoined portion 63c.

  First, a method of providing a plurality of notches 74a in the holding jig 74 as in the apparatus 71 of FIG. In this method, a processing tool is provided by providing a notch 74a having a width equal to or larger than the pressure roller 77a at the position of the abutting portion 73a of the holding jig 74 and moving the pressure roller 77a to the notch 74a. It is considered that 76a can be moved to the end of the long plate-like member 73, and the unjoined portion 73c can be reduced. However, in this method, it is necessary to make the interval between the notches 74a and the width of the long plate member 73 the same, and each time the width dimension of the long plate member 73 changes, a new holding jig 74 is attached. Need to design. When the width of the long plate-like member 73 is narrowed, the area of the holding jig 74 that holds the long plate-like member 73 becomes small, and it becomes difficult to fix the long plate-like member 73. is there.

  Further, as in the apparatus 81 of FIG. 8, a method in which the presser jig 84 is tapered and the pressure roller 87 a is run on the presser jig 84 is also conceivable. Even in this method, it is considered that the processing tool 86a can be moved to the end of the long plate-like member 83, and the unjoined portion 83c can be reduced. However, in this method, the pressing jig 84 may be deformed by the pressing load of the pressure roller 87a, and the pressing jig 84 may loosen the force for fixing the long plate member 3. Furthermore, the pressing jig 84 may be excessively deformed by the pressing load of the pressure roller 87a, and the pressing jig 84 may be damaged.

  Furthermore, a method is also conceivable in which the pressure roller is pulled out just before the pressure roller hits the holding jig. Even in this method, it is considered that the processing tool can be moved to the end of the long plate-like member, and the unjoined portion can be reduced. However, in this method, it is necessary to control the timing of pulling out the pressure roller, and torque feedback control is performed to detect the spindle load of the machining tool and control the pressing amount of the machining tool so that the spindle load is constant. When applied to the apparatus used, there is a high possibility that the pressing force of the processing tool increases rapidly at the moment when the pressure roller is pulled out, and it becomes impossible to join.

  The present invention provides a friction stir welding apparatus capable of solving the above-described problems, in which both ends in the longitudinal direction of a long plate-like member are fixed with a holding jig, and the front of the processing tool in the advancing direction is added. The present invention provides a friction stir welding apparatus that performs friction stir welding while pressing with a pressure roller so that an unjoined portion can be easily reduced.

  The friction stir welding apparatus according to the present invention forms a butted portion by abutting side surfaces of adjacent long plate-like members, and a working tool that is a friction stir welding tool from the upper surface side of the long plate-like member. A friction stirrer for pressing the processing tool relative to the abutting portion to join the long plate-like members together, the processing tool and the moving direction of the processing tool forward A pressure roller that presses the butted portion of the long plate-shaped member from the upper surface side, an auxiliary roller disposed in front of the pressure roller in the moving direction, and a longitudinal direction of the long plate-shaped member A pressing jig that collectively presses the long plate-like members that are butted against each other from the upper surface side, and a climbing jig that is disposed in the vicinity of the pressing jig, the processing tool and the pressure roller , The auxiliary roller integrally moves relative to the butting portion, and when the processing tool approaches the pressing jig, the auxiliary roller rides on the riding jig, and the pressure roller It is characterized in that it moves above the presser jig so as not to contact the presser jig.

  And the friction stir welding apparatus of the present invention is also characterized in that it is possible to join three or more of the long plate-like members side by side.

  In the friction stir welding apparatus of the present invention, it is preferable that the pressure roller and the auxiliary roller are integrally movable in the pressure direction of the pressure roller, and the pressure roller and the auxiliary roller Are preferably supported by a common support portion.

  Furthermore, in the friction stir welding apparatus of the present invention, it is preferable that the substantial width of the auxiliary roller is wider than the width of the pressure roller.

  And it is preferable to use the friction stir welding apparatus of this invention for joining an extrusion hollow material as said elongate plate-shaped member.

  According to the friction stir welding apparatus of the present invention, when the side surfaces of the long plate-like member are butted together and joined, the unjoined portions generated at both ends in the longitudinal direction of the long plate-like member can be reduced.

It is the schematic block diagram which looked at the friction stir welding apparatus of this invention from the upper direction. It is the schematic block diagram which looked at the friction stir welding apparatus of this invention from the side. It is a figure which shows an example of the structure which presses a elongate plate-shaped member about the friction stir welding apparatus of this invention. It is a figure explaining operation | movement of the friction stir welding apparatus of this invention. It is a figure explaining an example of the fixing method of the hollow material for joining a some hollow material efficiently. It is a figure explaining the friction stir welding apparatus provided with the conventional pressure roller. It is a figure explaining the problem of the friction stir welding apparatus provided with the conventional pressurization roller. It is a figure explaining the other problem of the friction stir welding apparatus provided with the conventional pressurization roller.

  Hereinafter, embodiments of the friction stir welding apparatus of the present invention will be described with reference to the drawings.

  In FIG. 1, the schematic block diagram when the friction stir welding apparatus 1 (henceforth apparatus 1) which is an embodiment of this invention is seen from upper direction is shown. The apparatus 1 presses together both the longitudinal direction both ends of the long plate-shaped member 3 from the upper surface side, the stage 2 in which the long plate-shaped members 3 are arranged side by side so as to form the butted portion 3a. A pressing tool 4, a mounting jig 5 arranged adjacent to the pressing jig 4, and a processing tool attached to the friction stir processing machine 6 that moves on the butting portion 3 a and pressed against the butting portion 3 a while rotating. 6a, a pressure roller 7a that is arranged in front of the processing tool 6a in the moving direction and presses the butting portion 3a, and an auxiliary roller 7b that is arranged in front of the pressing roller 7a in the moving direction are basic components. Yes. Then, the processing tool 6a, the pressure roller 7a, and the auxiliary roller 7b integrally move on the abutting portion 3a, whereby the joining portion 3b is formed in the abutting portion 3a, and the long plate-like members 3 are joined to each other in the joining portion 3b. Through friction stir welding. In FIG. 1, the support pressurizing mechanism of the friction stir processing machine 6, the support mechanism of the pressurizing roller 7 and the auxiliary roller 8 are not shown.

  FIG. 2 is a schematic configuration diagram of the apparatus 1 as viewed from the side. The holding jig 4 presses the end of the long plate-like member 3 from the upper surface side and fixes the long plate-like member 3 to the stage 2. Here, the force by which the holding jig 4 presses the long plate-like member 3 can be fixed even if the long plate-like member 3 is warped, and the end of the long plate-like member 3 is not buckled. It is preferable to use the force of The climbing jig 5 is arranged adjacent to the presser jig 4, and the height h from the upper surface of the long plate-shaped member 3 to the upper surface of the climbing jig 5 is determined from the upper surface of the long plate-shaped member 3. It is designed to be higher than the height h ′ up to the upper surface of the tool 4. A tapered portion 5 a is provided at the end of the climbing jig 5 so that the auxiliary roller 7 b can easily climb onto the climbing jig 5.

  The holding jig 4 may be designed to have sufficient strength to fix the long plate-like member 3, but the climbing jig 5 is designed to withstand the impact when the auxiliary roller 7b rides on. There is a need to. Therefore, the climbing jig 5 is made by processing a material having high hardness such as ceramics or tool steel, or an elastic material such as rubber is attached to the surface, and the impact when the auxiliary roller 7b climbs is softened. It is preferable to make it possible.

  The processing tool 6a is attached to the friction stir processing machine 6, rotates, is pressed against the butting portion 3a, and moves on the butting portion 3a, thereby forming the joint portion 3b in the butting portion 3a. Here, it is preferable that the machining tool 6a is controlled so that the spindle load becomes constant by using torque feedback control. When torque feedback control is used, even if the upper surface state (height, smoothness, etc.) of the long plate-like member 3 is somewhat varied, the metal in the vicinity of the butt portion 3a can be stably stirred by friction, which is good. Thus, it is possible to stably form and join the long plate-like members 3 to each other by friction stir welding.

  A roller unit 7 having a pressure roller 7a and an auxiliary roller 7b is attached in front of the friction stir processing machine 6 in the moving direction. The roller unit 7 can be detached from the friction stir processing machine 6 and can be attached to a conventional friction stir processing machine.

  The pressure roller 7a is arranged in front of the processing tool 6a in the moving direction, and is supported by the cylinder 7d through the support portion 7c. The cylinder 7d is attached to the friction stir processing machine 6 through the guide 7e. Yes. Therefore, the pressure roller 7a can press the butting portion 3a from above by the force with which the cylinder 7d pushes down the support portion 7c. The pressure roller 7a preferably pressurizes the butt portion 3a with a load of about 1000 to 10000N, and is preferably a pressure roller 7a made of a material that can withstand the load, for example, tool steel. The pressure roller 7a has a higher load per unit contact area when the contact area with the abutting portion 3a is reduced, so that the abutting portion can be more firmly fixed. Therefore, it is preferable that the pressure roller 7a is a pressure roller 7a having a narrow width so that traveling does not become unstable.

  The auxiliary roller 7b is arranged in front of the pressure roller 7a in the moving direction and is supported by the support portion 7c. And the lower end of the auxiliary roller 7b is arranged higher than the lower end of the pressure roller 7a so that the lower end of the auxiliary roller 7b does not contact the presser jig 4, and the height is set higher than the thickness of the presser jig 4. The

  The pressure roller 7a and the auxiliary roller 7b are supported by a common support portion 7c connected to the cylinder 7d, and the support portion 7c is always pressed from above by the cylinder 7d. And since the pressure roller 7a and the auxiliary roller 7b are supported by the common support part 7c, the pressure roller 7a and the auxiliary roller 7b move integrally in the direction which the pressure roller 7a presses. Therefore, when the auxiliary roller 7b rides on the riding jig 5 and moves upward, the pressure roller 7a also moves integrally with the auxiliary roller 7b and the support portion 7c, and is separated from the butting portion 3a upward. .

  Here, it is preferable that the auxiliary roller 7b has a structure that is difficult to be damaged by an impact received when it rides on the riding jig 5, and is preferably a wide auxiliary roller 7b. As described above, considering that the pressure roller 7a is preferably narrow, it is preferable that the auxiliary roller 7b is relatively wider than the pressure roller 7a. Furthermore, the auxiliary roller 7b may be a plurality of divided rollers, and may be an auxiliary roller 7b that is substantially wider than the pressure roller 7a. Further, an elastic material such as rubber may be attached to the outer periphery of the auxiliary roller 7b so that an impact received when the auxiliary roller 7b gets on the riding jig 5 is reduced.

  The apparatus 1 in FIG. 2 is an apparatus for fixing the long plate-like member 3 on the flat stage 2. As shown in FIG. 3, the floor plate 2 a is provided on the stage 2 and the long plate-like member 3 is moved upward. It is preferable to be bent and fixed.

  When the long plate-like member 3 is bent upward, tensile stress is applied in the longitudinal direction of the long plate-like member 3, so that the long plate-like member 3 after joining becomes difficult to bend downward, and due to joining. Warpage in the longitudinal direction can be reduced. In addition, when a large number of the long plate-like members 3 are arranged and joined, the material also contracts in the arrangement direction and warpage is likely to occur. However, if the long plate-like member 3 is curved upward, the long plate-like member 3 becomes difficult to bend in the arrangement direction, and even when a large number of the long plate-like members 3 are arranged and joined, warpage in the arrangement direction can be reduced.

  Further, when the long plate-like member 3 is long, it is difficult to strongly press the vicinity of the center in the longitudinal direction of the long plate-like member 3 against the stage 2 only by fixing both ends with the holding jig 4. There is a problem that the pressing force is weakened and the butt portion 3a is likely to be displaced, and a joining defect such as a step is formed after joining. When the long plate-shaped member 3 is bent upward, the vicinity of the center in the longitudinal direction of the long plate-shaped member 3 is pressed against the floor plate 2a to be strongly fixed, and the butt portion 3a is less likely to be displaced and joined. It becomes possible to suppress the occurrence of bonding defects such as a step later.

  The fixing method as shown in FIG. 3 is an effective fixing method for joining a material in which a level difference is likely to occur in the abutting portion 3a, that is, a material that is difficult to press in the plate thickness direction and is easily deformed. It is effective for friction stir welding of materials.

  The movement of the pressure roller 7a and the auxiliary roller 7b at the longitudinal end of the long plate-like member 3 will be described with reference to the schematic view seen from the side of FIG.

  The figure of (a) showed the state in which the processing tool 6a, the pressure roller 7a, and the auxiliary roller 7b are moving on the butt | matching part 3a and are approaching the longitudinal direction edge part of the elongate plate-shaped member 3. FIG. Is. The pressure roller 7a presses the abutting portion 3a in the moving direction of the processing tool 6a from above, and the processing tool 6a is pressed against the abutting portion 3a while rotating to form a joint portion 3b. In this state, the auxiliary roller 7b moves integrally with the friction stir processing machine 6 on the upper surface of the long plate-like member 3 and the upper side of the presser jig 4 so as not to contact the presser jig 4. To do.

  When the processing tool 6a moves and enters the state shown in (b), the auxiliary roller 7b comes into contact with the mating jig 5. At this time, the pressure roller 7a maintains a state where the butt portion 3b is pressed from above, and the processing tool 6a also maintains a state where it is pressed against the butt portion 3a.

  When the processing tool 6a further moves to the state shown in (c), the auxiliary roller 7b rides on the riding jig 5 and moves upward while pressing the taper 5a. Since the pressure roller 7a is connected to the support portion 7c together with the auxiliary roller 7b, the processing roller 7a also moves upward together with the auxiliary roller 7b so that the upper side of the presser jig 4 does not contact the presser jig 4. Moving. In this state, the pressing roller 7a moves upward simultaneously with the auxiliary roller 7b climbing on the taper 5a, so that the processing tool 6a does not press the butting portion 3a rapidly. Therefore, even if the torque feedback control is applied to this apparatus, there is no problem that the joining cannot be performed.

  Finally, the processing tool 6a further moves, and the processing tool 6a reaches the end of the holding jig 4 as shown in the state of FIG. Thus, when the device 1 is used, the length L of the unjoined portion 3c can be made shorter than the length L ′ of the unjoined portion 63c of the device 61 of FIG.

  The friction stirrer as described above can butt and fix the long plate-like member regardless of the width of the long plate-like member, and the pressure roller strongly presses the holding jig during joining. Since there is no, the presser foot of the presser jig will not loosen. Furthermore, since the pressing force of the processing tool does not change abruptly at the end of the long plate-like member, it can also be applied to a torque feedback control device, which eliminates the problem of the conventional technology. it can.

1, 51, 61, 71, 81: Friction stir welding apparatus 2, 52, 62, 72, 82: Stage 2a: Floor plate 3, 53, 63, 73, 83: Long plate member 3a, 53a, 73a: Butt Portions 3b, 83b: Joint portions 3c, 63c, 83c: Unjoined portions 4, 54, 64, 74, 84: Pressing jig 74a: Notch portion 5: Riding jig 5a: Taper 6: Friction stir processing machine 6a, 56a, 66a, 76a, 86a: Processing tool 7: Roller unit 7a, 67a, 77a, 87a: Pressure roller 7b: Auxiliary roller 7c: Support part 7d: Cylinder 7e: Guide L, L ′, L ″: Unjoined portion

As an apparatus for fixing the butt portion, for example, Patent Document 2 describes an apparatus that presses the butt portion in the advancing direction of the processing tool with a pressure roller. By using such a pressure roller, the butt portion is fixed, and it is possible to prevent a step from being generated in the groove portion after joining.

The friction stir welding apparatus according to the present invention forms a butted portion by abutting side surfaces of adjacent long plate-like members, and a working tool that is a friction stir welding tool from the upper surface side of the long plate-like member. A friction stirrer for pressing the processing tool relative to the abutting portion to join the long plate-like members together, the processing tool and the moving direction of the processing tool forward A pressure roller that presses the butted portion of the long plate-shaped member from the upper surface side, an auxiliary roller disposed in front of the pressure roller in the moving direction, and a longitudinal direction of the long plate-shaped member A pressing jig that collectively presses the long plate-like members that are butted against each other from the upper surface side, and a climbing jig that is disposed in the vicinity of the pressing jig, the processing tool and the pressure roller and Serial auxiliary roller, relative movement integrally with the abutting portions, when the machining tool approaches the presser jig, rides in the auxiliary rollers the riding jig on, the pressure roller It is characterized by moving above the presser jig so as not to contact the presser jig.

In the friction stir welding apparatus of the present invention, it is preferable that the pressure roller and the auxiliary roller are integrally movable in the pressure direction of the pressure roller, and the pressure roller and the auxiliary roller Are preferably supported by a common support portion.

In FIG. 1, the schematic block diagram when the friction stir welding apparatus 1 (henceforth apparatus 1) which is an embodiment of this invention is seen from upper direction is shown. The apparatus 1 presses together both the longitudinal direction both ends of the long plate-shaped member 3 from the upper surface side, the stage 2 in which the long plate-shaped members 3 are arranged side by side so as to form the butted portion 3a. A pressing tool 4, a mounting jig 5 arranged adjacent to the pressing jig 4, and a processing tool attached to the friction stir processing machine 6 that moves on the butting portion 3 a and pressed against the butting portion 3 a while rotating. 6a, a pressure roller 7a that is arranged in front of the processing tool 6a in the moving direction and presses the butting portion 3a, and an auxiliary roller 7b that is arranged in front of the pressing roller 7a in the moving direction are basic components. Yes. And the processing tool 6a
And the pressure roller 7a and the auxiliary roller 7b move integrally on the abutting portion 3a, so that the joining portion 3b is formed in the abutting portion 3a, and the long plate members 3 are frictionally stirred via the joining portion 3b. Be joined. In addition, in FIG. 1, illustration is abbreviate | omitted about the support pressure mechanism of the friction stir processing machine 6, the support mechanism of the pressure roller 7a, and the auxiliary roller 7b .

The holding jig 4 may be designed to have sufficient strength to fix the long plate-like member 3, but the climbing jig 5 is designed to withstand the impact when the auxiliary roller 7b rides on. There is a need to. Accordingly, the climbing jig 5 is made by processing a material having high hardness such as ceramics or tool steel, or an elastic material such as rubber is pasted on the surface, and the auxiliary roller 7b.
Preferably structured so that the impact is reduced to receive when is riding.

A roller unit 7 having a pressure roller 7a and an auxiliary roller 7b is attached in front of the friction stir processing machine 6 in the moving direction. The roller unit 7 includes a friction stir processing machine 6
And can be attached to a conventional friction stir processing machine.

The pressure roller 7a is arranged in front of the processing tool 6a in the moving direction, and is supported by the cylinder 7d through the support portion 7c. The cylinder 7d is attached to the friction stir processing machine 6 through the guide 7e. Yes. Accordingly, the pressure roller 7a has the cylinder 7d supported by the support portion 7c.
The abutting portion 3a can be pressurized from above by the force of pushing down. Pressure roller 7
It is preferable to press the butt portion 3a with a load of about 1000 to 10,000 N, and a is preferably made of a material that can withstand the load, for example, tool steel. And pressure roller 7a
The load per unit contact area becomes higher when the contact area with the butt portion 3a is reduced,
The butt portion can be more firmly fixed. Thus, pressure roller 7a is to the extent that running does not become unstable, preferably narrow Ku width.

Here, the auxiliary roller 7b is preferably to hardly damaged by impact received when the riding the riding jig 5 structure, preferably wide Ku width. As described above, considering that the pressure roller 7a is preferably narrow, the auxiliary roller 7b is the pressure roller 7a.
It is preferable that the width is relatively wider than a. Further, the auxiliary roller 7b is in the plurality of divided rollers, the width may be the widely than substantially pressure roller 7a.
Further, an elastic material such as rubber may be attached to the outer periphery of the auxiliary roller 7b so that the impact received when riding on the riding jig 5 is reduced.

When the long plate-like member 3 is bent upward, tensile stress is applied in the longitudinal direction of the long plate-like member 3, so that the long plate-like member 3 after joining becomes difficult to bend downward, and due to joining. Warpage in the longitudinal direction can be reduced. In addition, when a large number of the long plate-like members 3 are arranged and joined, the material also contracts in the arrangement direction and warpage is likely to occur. However, if the long plate-like member 3 is curved upward, the long plate-like member 3 becomes less curved in the direction of arranging, be joined by an array of a number of elongated plate-like member 3 can also be reduced direction warp arranged.

4A shows a state in which the processing tool 6a, the pressure roller 7a, and the auxiliary roller 7b are moving on the abutting portion 3a and approaching the longitudinal end portion of the long plate-like member 3. FIG. It is shown. The pressure roller 7a presses the abutting portion 3a in the moving direction of the processing tool 6a from above, and the processing tool 6a is pressed against the abutting portion 3a while rotating to form a joint portion 3b. In this state, the auxiliary roller 7b moves integrally with the friction stir processing machine 6 on the upper surface of the long plate-like member 3 and the upper side of the presser jig 4 so as not to contact the presser jig 4. To do.

Machining tool 6a moves, when a state of FIG. In FIG. 4 (b), the auxiliary roller 7b comes into contact with the Norigoge jig 5. At this time, the pressure roller 7a maintains a state where the butt portion 3b is pressed from above, and the processing tool 6a also maintains a state where it is pressed against the butt portion 3a.

Machining tool 6a moves further, when a state of FIG. FIG. 4 (c), an auxiliary roller 7b
Moves on the riding jig 5 while pressing the taper 5a. Since the pressure roller 7a is connected to the support portion 7c together with the auxiliary roller 7b, the auxiliary roller 7
The processing roller 7a also moves upward together with b, and moves above the presser jig 4 so as not to contact the presser jig 4. Incidentally, in this state, the auxiliary roller 7b simultaneously as rides on taper 5a, since the pressure roller 7a is moved upward, the force working tool 6a is Ru pressing the butted portion 3a will not be abruptly changed. Therefore, even if the torque feedback control is applied to the present apparatus, the problem that the long plate-like members 3 cannot be joined does not occur.

Finally, the processing tool 6a is further moved, as shown in FIG state of FIG. 4 (d), the working tool 6a is joined is completed reaches the end of the pressing jig 4. Thus, when the device 1 is used, the length L of the unjoined portion 3c is equal to the length L ′ of the unjoined portion 63c of the prior art device 61 shown in FIG.
The long plate-like member can be effectively used .

Further, the friction stirrer as described above is not limited to the width of the long plate-like member, but the long plate-like member is used.
Butt can be fixed, in the bonding, since no pressurizing strongly jig pressure roller pressing, without pressing jig may be damaged by the pressure, it is also possible pressing of the pressing jig loosening <br/> Yes. Furthermore, at the end of the elongated plate-shaped member since the pressing force of the machining tool does not vary abruptly, is also applicable to friction stir welding apparatus torque feedback control is added, a problem in the prior art it is possible to eliminate the point was Tei.

Claims (6)

The side surfaces of adjacent long plate-like members are butted together to form a butt portion, and a processing tool that is a friction stir welding tool is pressed against the butt portion while rotating from the upper surface side of the long plate-like member, In the friction stirrer for joining the long plate members by moving the tool relative to the butting portion,
The processing tool, a pressure roller that is disposed in front of the processing tool in the movement direction and presses the butted portion of the long plate-shaped member from the upper surface side, and an auxiliary that is disposed in front of the pressure roller in the movement direction A roller, a pressing jig that collectively presses the long plate-like member that is abutted at both ends in the longitudinal direction of the long plate-like member from the upper surface side, and a climbing jig that is disposed in the vicinity of the pressing jig And
The processing tool, the pressure roller, and the auxiliary roller integrally move relative to the abutting portion, and when the processing tool approaches the presser jig, the auxiliary roller is placed on the climbing jig. A friction stir welding apparatus, wherein the friction stir welding apparatus moves on the presser jig so as not to come into contact with the presser jig.   The friction stir welding apparatus according to claim 1, wherein three or more long plate-like members can be joined side by side.   The friction stir welding apparatus according to claim 1 or 2, wherein the pressure roller and the auxiliary roller are integrally movable in a pressure direction of the pressure roller.   The friction stir welding apparatus according to claim 3, wherein the pressure roller and the auxiliary roller are supported by a common support portion.   The friction stir welding apparatus according to any one of claims 1 to 4, wherein a substantial width of the auxiliary roller is wider than a width of the pressure roller. The friction stir welding apparatus according to any one of claims 1 to 5, wherein an extruded hollow member is joined as the long plate-like member.

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