WELDING METHOD FOR OUTER JOINT MEMBER OF CONSTANT VELOCITY UNIVERSAL JOINT, AND OUTER JOINT MEMBER

摘要

A welding method for an outer joint member of a constant velocity universal joint includes constructing a cup section having track grooves, which engage with torque transmitting elements, formed along an inner periphery thereof and a shaft section that is formed on a bottom portion of the cup section by two or more separate members, joining a cup member forming the cup section and a shaft member forming the shaft section, and melt-welding end portions of the cup member and the shaft member. The cup member and the shaft member are shaped so that a sealed hollow cavity portion is formed when the end portions of the cup member and the shaft member are brought into abutment against each other, the melt-welding of the end portions being performed when the sealed hollow cavity portion is under atmospheric pressure or lower.

主权项

1. A welding method for an outer joint member of a constant velocity universal joint, the welding method comprising:
constructing a cup section having track grooves, which engage with torque transmitting elements, formed along an inner periphery thereof and a shaft section that is formed on a bottom portion of the cup section by two or more separate members; joining a cup member forming the cup section and a shaft member forming the shaft section; and melt-welding end portions of the cup member and the shaft member, the cup member and the shaft member being brought into abutment against each other at the end portions thereof, the cup member and the shaft member being shaped so that a sealed hollow cavity portion is formed when the end portions of the cup member and the shaft member are brought into abutment against each other, the melt-welding the end portions being performed in a state in which the sealed hollow cavity portion is under atmospheric pressure or lower.