| 摘要 |
PROBLEM TO BE SOLVED: To easily perform the spot welding by the friction stirring and joining operation using a rotary tool. SOLUTION: A work in the vicinity of the rotary tool 1 is held by a work holding means and subjected to the friction stirring and joining operation. The work holding means is provided so as to surround the rotary tool, and movable in the direction of the axis of rotation of the rotary tool independently from the rotary tool. Thus, any deformation of the work caused by the spot welding can be suppressed. Further, any labor of fixing the work can be substantially saved in the spot welding by the friction stirring and joining.
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