| 摘要 |
PROBLEM TO BE SOLVED: To provide a welding method for welding metal members each other via a joint member where airtightness and water tightness between both the side faces of the metal members can be enhanced. SOLUTION: Disclosed is a welding method where a rotary tool G is moved to the metal member 1 to be welded obtained by inserting a joint member U1 into a hollow part formed by butting a first metal member 1a and a second metal member 1b at the edge parts, so as to perform friction stir welding. The method comprises: a surface side welding stage where a butted part 1 on the surface side is subjected to friction stirring from the surface A; a back face side welding stage where a butted part J2 on the back face side is subjected to friction stirring from the back face B; and a side face welding stage where a butted part J3 in the joint on the second metal side and a butted part J4 in the joint on the first metal side are subjected to friction stirring from the first side face C. COPYRIGHT: (C)2009,JPO&INPIT
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