Friction stir welding device, its operating method and seam structure

摘要

The tool 10, the rotational actuator 8, the linear actuator 7, and the 1st member W1 face the tool 10, and also the 1st member W1, the 2nd member W2 And (A) arranged so as to be in the order of the third member (W3), and in a state in which the tool 10 is rotated, the tip end of the tool 10 presses the to-be-joined part Wa of the to-be-joined object W , (B) for controlling the linear actuator 7 and the rotational actuator 8, and controlling the linear actuator 7 and the rotational actuator 8, so that the softened third member W3 is formed by the second member W2 (C) for reaching the tip of the tool 10 to the first position so as to extend upward from the upper surface of the It relates to a friction stir welding device having a control device (110) configured to execute (D) for controlling the rotational actuator (8).