| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for friction stir welding capable of exactly holding a rotating body on a rotary center shaft, protecting a bearing and the rotating body, and preventing solidification cracks on a welding part. SOLUTION: The device for friction stir welding is provided with a base 14 for making members 15 and 16 to be welded abut and fixing them, and a prove 52 which is provided at the tip of a rotating body 13 and contacts to the members 15 and 16 to be welded. The base 14 is provided with a first cooling means for keeping a welding line 17 at a constant temperature. A tool head 12 for driving the rotating body 13 is provided at the rear step. The tool head 12 is provided in a travelling body 11 which is movable in the three- dimensional directions and equipped with a second cooling means 18 for cooling the tool head 12.
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