JP2001205453A - Jig for friction stir joining - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for friction stir joining of works such as section and section panel in which clamps composed of vices are disposed on both side of a central supporting base and the adjustment of clamp position corresponding to the change of width of the works can be easily and quickly performed by devising a clamp mechanism composed of vices. SOLUTION: A C clamp is constituted in such a manner that fixed nails are arranged on one side of the supporting base, horizontal axes are projectingly disposed from the other side and, the vices are mounted slidably on the horizontal axes by presupposing the jig for friction stir joining of works such as section and section panel in which the clamps composed of vices are disposed on both side of the central supporting base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp mechanism for a workpiece in a jig for friction stir welding, and a clamp position for accommodating the width of a long workpiece such as a profile panel or a profile. Can be adjusted easily and quickly, and the efficiency of the friction stir welding operation can be improved.

[0002]

2. Description of the Related Art In order to butt-join long workpieces by friction stir welding, the workpieces need to be supported and fixed by a smooth table and clamps arranged on both left and right sides. In the friction stir welding, as shown in FIGS. 4 and 5, the workpieces P, P are brought into contact with each other and pressed with the tightening force F, and the pin 1 of the welding tool T is inserted into the abutting surface, and the workpiece is rotated at a high speed and advanced. Then, the joint is heated and plasticized by frictional heat between the shoulder 3 of the main body 2 of the joining tool T and the surface of the joint, and frictional heat between the pin 1 and the joint surface, and the joint is made with this. Since the pins 1 of the welding tool T advance while being bitten between the welding surfaces pressed against each other, the workpieces P, P receive a force in the direction of being pushed away from each other against the fastening force F, and the clamping force is weak. And the joining surfaces of both panels are separated from each other.

[0003] On the other hand, a profile or a profile panel is manufactured by extrusion molding using a die. However, the friction resistance between the die and the molded product is not uniform, and the cooling rate is not uniform. A minute bend occurs in the surface plane, and the deformation amount often reaches 2 mm with a 2 m-long shape member (see FIG. 3), and the shape of the bend is various and not always smooth. When the shape and the shape panel deformed minutely as described above are abutted against each other, a large gap is generated in the abutment surface due to the bending. Then, if friction stir welding is performed with a gap left, there is a problem that a partial depression is generated on the joining surface and the joining strength is reduced. In order to avoid this problem, friction stir welding is performed in a state where the gap is reduced to zero by tightening with a clamp to correct the bending. A large number of clamps are arranged at predetermined intervals in order to correct the bending by tightening both panels, and the tightening force of each clamp is individually adjusted. By the way, the example shown in FIG.
This is for joining a profile panel having a length of 10 m, and the interval between the clamps is 200 cm. The clamp reliably holds the work at the set position against the force of the pin 1 of the welding tool T. On the other hand, it is required that the clamp is easy and quick to hold and release the workpiece.

A clamp using a hydraulic cylinder or a pneumatic cylinder can be used as the clamp because its holding and releasing operations are easy and quick. However, it is easy to securely hold a work and correct the above-mentioned plane bending of the work. Not. On the other hand, screw clamps (ie, vise) can easily adjust the amount of tightening of individual clamps, can exert a strong clamping force, and are inexpensive in equipment costs. Is used regularly. Clamping with a vise has many advantages as described above.When joining workpieces of the same width repeatedly, loosen the vise slightly, take out the joined panel, and install a new profile panel. You just need to tighten a little vise. However, the stroke caused by one rotation of the vise shaft is very small, so when joining workpieces of different widths in sequence,
To adjust the clamping position of the vise correspondingly, the shift stroke of the vise becomes large. Therefore, it takes a lot of trouble and time for a vise operation to cope with a change in the width of the work.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention relates to a jig for friction stir welding of a workpiece, such as a profile or a profile panel, in which clamps by means of a vise are arranged on both sides of a support table. It is an object of the present invention to devise a clamp mechanism using a vise so that adjustment of a clamp position can be performed easily and quickly.

[0006]

[Means taken to solve the problem] A means taken to solve the above problem is a jig for friction stir welding of a workpiece such as a profile or a profile panel, in which clamps by means of a vise are arranged on both sides of a support. Assuming that, a fixed claw is arranged on one side of the support base, a horizontal axis is protruded from the other side, and a vice is slidably mounted on this horizontal axis to constitute a shrimp vise. It is.

[0007]

The shrimp vise itself is conventionally known. The shrimp vise main body can move along the horizontal axis when no load is applied to the claws, and when a load is applied to the claws, the load causes the vise main body to be connected to the horizontal axis and slide. It becomes immobile and its coupling force increases in proportion to the load on the pawl, so that the coupling between the vise main body and the horizontal axis does not come off. When the shrimp vise arranged on the other side of the work to be friction stir welded on the support base is slightly loosened with the handle operation, the load on the claw of the shrimp vise becomes zero, so the above The connection to the horizontal axis is lost. Therefore, the vice main body becomes slidable with respect to the horizontal axis, and thereafter can be quickly separated to the other side of the work. Further, even when approaching the work, the vice main body can be quickly moved toward the work until the movable claw hits the work.

Further, when the width of the work is different, the shift stroke (moving range) of the vice movable pawl becomes large. However, regardless of the moving range, the vice is tightened according to the width of the work. Significant position adjustments can be made quickly. The jig for friction stir welding according to the above-mentioned solution is most effective as a jig for friction stir welding of a shape member and a profile panel. However, even if the work is a flat plate, the same effect is obtained. It is also effective when used for stirring welding.

[0009]

Next, an embodiment will be described with reference to FIGS. This embodiment is an example in which the present invention is applied to friction stir welding of a panel in which front and back skins are connected by vertical ribs at predetermined intervals. The profile panels A, A are 50m thick
m, a width B 40 cm, and a length 10 m. Since the left and right ends are fitted and abutted, the cross-sectional shapes of the left and right ends are different. For this reason, the plane bending may reach a maximum of 2 mm. Cross section I in the center
There is a central support 10 in the form. The center support is slightly longer than 10 m, and the work support surface at the upper end is as smooth as the surface plate, and its width is 30 cm. Six support bases 11 at 200 cm intervals on the left and right sides of the central support base 10
a and 11b are respectively arranged. Both support bases 1
Reference numerals 1a and 11b are fixed to the upper ends of the columns S, respectively. A fixing claw 12 is provided on one of the support stands 11a, and a shrimp vice 13 is provided on the other support stand 11b. A horizontal shaft 14 protrudes outward from the support base 11b, and the lower end of the shrimp vice main body 15 is slidably fitted on the horizontal shaft. A screw shaft 16 having a diameter of 20 mm is screwed to the shrimp vice main body, a movable claw 17 is provided at the tip, and a handle 18 is provided at the rear end. The mechanism of the shrimp vise itself is a conventionally well-known mechanism, and therefore a detailed description thereof will be omitted. The central support 10 and the left and right support 1
One ends of the profile panels A, A placed on 1a, 11b are brought into contact with the fixed claws 12, and the other ends are clamped with the movable claws 17 of shrimp vise to clamp the profile panels A, A.

The straightening of the plane is performed by individually adjusting the tightening of the six shrimp vice 13. In the case of repeatedly performing friction stir welding of profile panels having the same width, the movable claws 17 are used for tightening and straightening.
May be moved to the left and right by about 10 mm, but when the width is different, the movable range of the movable claw 17 often reaches about 100 mm. In this case, when the movable claw 17 is moved by 2 to 3 mm by operating the handle 18, the movable claw 1 is moved.
Since the load on 7 becomes zero,
5 becomes slidable with respect to the horizontal shaft 14. Therefore,
Even if the movable range of the movable claw 17 is 100 mm, the range can be moved quickly and easily. Therefore, even if the width of the panel to be joined is largely changed, adjustment of the tightening position of the vise main body to cope with this is easily and quickly performed.

[0011]

[Effect] As described above, the clamping mechanism of the friction stir welding jig used for friction stir welding of a long workpiece such as a shaped material or a shaped material panel is based on the so-called shrimp vise, and thus the position of the vise is achieved. Large forward and backward operations can be performed easily and quickly. Therefore, when the width of the long work is different, it is easy to adjust the lamp position of the vice main body for this width change.
Can be done quickly. Therefore, profiles of various widths,
The work efficiency of the friction stir welding operation of sequentially joining works such as profile panels can be remarkably improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment.

FIG. 2 is a side view of the embodiment.

FIG. 3 is a plan view showing a state in which a profile and a profile panel are bent in a plane.

FIG. 4 is a perspective view schematically showing a friction stir welding state.

FIG. 5 is a sectional view taken along line YY in FIG.

[Explanation of symbols]

 A: Profile panel S: Column T: Joining tool 1: Pin of joining tool 2: Body of joining tool 3: Shoulder of joining tool 10: Central support 11a, 11b: Support 12: Fixed claw 13: Shrimp 10,000 Force 14: Horizontal axis 15: Vise body 16: Movable claw 17: Movable claw 18: Handle

Claims (3)

[Claims] 1. A jig for friction stir welding of a long work in which clamps by means of a vise are arranged on both sides of a support, wherein a fixing claw is arranged on one side of the support and a horizontal shaft is arranged on the other side. A jig for friction stir welding that is protruded and slidably mounted on this horizontal axis to form a shrimp vice. 2. A jig for friction stir welding of a profile and a profile panel in which clamps by means of a vise are disposed on both sides of a central support, wherein a fixing claw is disposed on one side of the support. A friction stir welding jig with a horizontal shaft protruding from the side and a vise slidably mounted on this horizontal shaft to form a shrimp vise. 3. The jig for friction stir welding according to claim 1, wherein the length of the support is at least 2 m, and a large number of clamps are arranged at predetermined intervals.