| 摘要 |
Friction stir joining is carried out on members 20, 30, 40 by means of rotary tools 340A, 340B moving along two joining lines simultaneously. Where one of the two joining lines is interrupted, e.g. for a window 210, at a position P1 the rotary tool 340A is withdrawn from the joining material. At a position P3, gradual withdrawal of the rotary tool 340B is started. At a position P4, the travel of both tools 340A and 340B is stopped, and the tool 340B is completely withdrawn. Next, the tools 340A and 340B are inserted again and the travel is started again. The reinsertion amount of the tool 340B is larger than its insertion at the time of stopping the travel. Good friction stir joining along both lines can be obtained. <IMAGE> |
