Friction-stir spot welding device and method for operating same

Abstract

A friction-stir spot welding device includes a friction-stir spot welding tool including a pin, a shoulder having a hollow part into which the pin is inserted, and an oil agent interposed in an interlayer between an outer peripheral surface of the pin and an inner peripheral surface of the shoulder; and a control unit of the tool. The control unit executes first operation control of relatively moving the pin with respect to the shoulder in a state where the oil agent is held in the interlayer, and second operation control of relatively moving the pin with respect to the shoulder so that the oil agent is discharged from the interlayer to outside through a tip opening of the hollow part.

Dependencies are inferred from the claim text.