ROTARY TOOL UNIT, FRICTION STIR WELDING METHOD, DOUBLE-SKIN PANEL ASSEMBLY, AND FRICTION STIR WELDING METHOD FOR DOUBLE-SKIN PANEL

摘要

PROBLEM TO BE SOLVED: To provide a welding method with which welding defects can be prevented and with which metal plates can be suitably welded together when a pair of metal plates is welded together using a bobbin tool.

SOLUTION: A rotary tool unit 2 includes a bobbin tool 5 formed with a first shoulder 11, a second shoulder 12, and a pin 13 formed between the first shoulder 11 and the second shoulder 12. The rotary tool unit includes: a cylindrical holder 3 affixed to a chuck part 1a of a friction stir device 1; a slide shaft 4 that penetrates to the interior of the holder 3 and rotates integrally with the holder 3; the bobbin tool 5, the first shoulder 11 of which is affixed to the tip of the slide shaft 4; and a slide means 6 formed between the holder 3 and the slide shaft 4 such that the slide shaft 4 slides in the axial direction with respect to the holder 3.

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