| 摘要 |
When friction stir welding stacked plates 10, 20, the stacked surface of the plate 10 is provided with a groove 12. The outer side of the other plate 20 has a rib 22. A friction stir welding tool 50 is inserted from the rib 22 and rotated. The groove 12 is filled up during the friction stir welding by the metal of the rib 22. By this method, the pressure of the welding portion is not excessive, and therefore prevents the generation of a notch at the stacked surfaces. A lightweight joint having good characteristics can be obtained. <IMAGE> |
