| 摘要 |
PROBLEM TO BE SOLVED: To provide a weld method which can improve the rigidity and quality of a joining part of an outside joint member of a constant velocity universal joint which is manufactured by joining a cup member and a shaft member.SOLUTION: When joining end faces 50, 51 of a cup member 12a and a shaft member 13a by making them abut on each other, and radiating high-energy density beams to the end faces from an outside diameter side, recesses (52, 53) are formed at an inside diameter side of the joining end face 51 of the shaft member 13a in advance, and a weld part 49 having a cavity which is closed to the inside diameter side is thereby obtained after the but-welding. The joining end face 50 (protruded face 50a) of the cup member 12a is hung out to the inside diameter side rather than an inside diameter E of the joining end face 51 of the shaft member 13a. |
