| 摘要 |
PROBLEM TO BE SOLVED: To provide a friction stir welding method for two or more portions, which can easily perform the friction stir welding even when the thickness of one face plate at the friction stir welding portion is different from the thickness of the other face plate at the other friction stir welding portion. SOLUTION: Three shaped materials 10, 11, 12 are put on a jig 15 so as to form two butted portions. The thickness of the face plate 14 of the shaped material 10 is thick, but the thickness of the face plate 14 of the shaped material 12 is thin. The projected thickness of a projected portion 18 at the portion A for joining the thick face plate is thicker than the projected thickness of the projected portion at the portion B for joining the thin face plate 14. In the friction stir welding, the sizes of rotary tools to be inserted into the shaped materials 10, 11, 12 are the same. As a result, the friction stir welding can be easily carried out, because the sizes of all rotary tools can be made equal, and also the inserted depths of all rotary tools can be made equal. COPYRIGHT: (C)2008,JPO&INPIT |
