| 摘要 |
PROBLEM TO BE SOLVED: To provide a welding method for welding metal members each other via a joint member where airtightness and watertightness between the side faces of the metal members can be enhanced. SOLUTION: Disclosed is a welding method where a rotary tool is moved to a butted part exposed in the metal members H to be welded, so as to perform friction stir welding. The method comprises: a butting stage where the edge part of the first metal member 10a and the edge part of the second metal member 10b are butted; a first stepped part normal welding stage where a butted part J20 is subjected to friction stirring; a joint part member arrangement stage where a joint member 20 is arranged at the recessed part formed by the first metal member 10a and the second metal member 10b; a first surface normal welding stage where a butted part J2 is subjected to friction stirring from the surface A; a second surface normal welding stage where a butted part J4 is subjected to friction stirring from the surface A; and a side face normal welding stage where butted parts exposed to the side faces of the metal members H to be joined are subjected to friction stirring from the side faces, and the plasticized regions formed in the respective stages are overlapped. COPYRIGHT: (C)2009,JPO&INPIT
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