| 摘要 |
PROBLEM TO BE SOLVED: To provide a friction stir welding method enabling metal members to be welded up to a deep position of a butting part, by reducing a load applied to a friction stir apparatus.SOLUTION: The friction stir welding method is provided for welding two metal members 1 by using a rotary tool F including an agitation pin F2 and connected to a rotary shaft of a friction stir apparatus D. The friction stir welding method comprises: a temporary welding step of temporarily welding metal members 1 and 1 at a butting part where the metal members are butted each other; and a regular welding step of inserting a rotated agitation pin F2 into the butting part and performing friction stir welding while only the agitation pin F2 of the rotary tool F out of the friction stir apparatus D and the rotary tool F is brought into contact with the metal member 1. The temporary welding rotary tool for use in the temporary welding step is constituted of a shoulder part and the agitation pin, and in the temporary welding step, the temporary welding rotary tool is relatively moved while pushing a lower end surface of the shoulder part to a surface of the mutual metal members 1 and 1. |
