| 摘要 |
PROBLEM TO BE SOLVED: To provide a spot-welding method for a metallic member, which can secure sufficient joining strength by stabilizing a joining position when joining, preventing an aluminum adhesion phenomenon to a rotary tool, and restraining worsened joining surface, even if the length of a pin of the rotary tool is short, when dissimilar metallic materials are joined by friction-stirring joining, and to provide a device therefor. SOLUTION: At a step S5 a pressurizing force of the rotary tool 4 can be maintained with the first pressurizing force. In other words, by maintaining the first pressurizing force at the first step of the pressurization, heat (frictional heat) H owing to a relative slide through the rotation of the rotary tool 4 is generated on the surface of the aluminum plate W1 and softens the aluminum plate W1. This softening performs the centering of a pin portion 4b completely and a rotation axis of the rotary tool 4 is determined. COPYRIGHT: (C)2005,JPO&NCIPI |
