| 摘要 |
PROBLEM TO BE SOLVED: To provide a friction stir welding method and a friction stir welding apparatus capable of promoting the solid state diffusion of a material to be welded by a simple means, reducing occurrence of residual stresses, and obtaining a sound and consistent weld part. SOLUTION: In the friction stir welding method, a rotary tool arranged on one side of a workpiece is pressed against a welding part of the workpiece, and rotated to weld the workpiece by the plastic flow based on the friction heat generated between the rotary tool and the workpiece, an ultrasonic impact element is arranged on the other side of the workpiece to add the ultrasonic impact generated by the ultrasonic impact element to an area after welding of the workpiece. COPYRIGHT: (C)2008,JPO&INPIT |
