Friction stir welding method and welding jig used therefor

Abstract

The invention relates to a friction stir welding method and a welding jig used thereof. A friction stir welding is performed by preparing a pair of members to be welded, each including an abutment surface and a margin portion provided in an extended manner, the margin portion including a welding surface that is continuous to the abutment surface by using a welding tool for performing friction stir welding. The welding tool integrally includes a columnar shoulder portion and a probe portion formed on a leading end surface of the shoulder portion, the probe portion having a diameter smaller than a diameter of the shoulder portion. The abutment surfaces and the welding surfaces are brought into contact with each other so as to form a continuous welding line therebetween. Under the state, a loading supporting jig is arranged in the bottom sides of the pair of margin portions partially, and a deformation limiting jig is partially arranged on the top surface sides of the pair of margin portions, and when the welding tool rotates, the welding tool is pressed against the top surface of a welding component, so that the welding lines move along the margin portions, and accordingly, the to-be-welded components are jointed with each other via a stir friction welding method.

Description

technical field [0001] The present invention relates to a friction stir welding method (method for implementing friction stir welding) and a welding jig used in the method. Background technique [0002] Such as Figure 16 with 17 As shown in , the friction stir welding (FSW) method is a method of welding the members 101 and 102 to be welded together. and 102) simultaneously, the rotating welding tool 103 is moved, and the components 101 and 102 are subsequently softened by the frictional heat generated between the welding tool 103 and the components 101 and 102. Subsequently, the components to be welded 101 and 102 are welded by solid phase welding Joining each other, the solid-phase welding method utilizes the plastic flow behavior caused by the rotation of the welding tool 103 . [0003] This friction stir welding is performed at low heat input, so that unlike general welding methods, thermal strain and strength reduction of the base material of the friction stir welded ...

AI Technical Summary

Problems solved by technology

[0006] However, disadvantageously, when the members 101 and 102 formed with the margin portion 107 are joined to each other by friction stir welding, each margin portion 107 needs to support the pressing load applied by the welding tool 103, and therefore, the margin portion 107 needs to be enlarged size to ensure its rigidity

Therefore, if Figure 21A and Figure 21B As shown in , the area of ​​the margin cut surface 109 formed by cutting the margin portion 107 becomes large, which is disadvantageous

[0007] In addition, the appearance of the surplus cut-off surface 109 is different from other parts of the surface of the product 110, resulting in a decrease in the appearance quality of the product 110.

In particular, in the case where the product 110 is used, for example, as a frame of a two-wheeled vehicle that needs to provide a fine appearance, this reduction in appearance quality will cause a significant problem.

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