| 主权项 |
1. A method of manufacturing an outer joint member of a constant velocity universal joint, which is constructed by forming, through use of separate members, a cup section having track grooves formed at an inner periphery of the cup section and engageable with torque transmitting elements, and a shaft section formed at a bottom portion of the cup section, and by welding a cup member forming the cup section and a shaft member forming the shaft section, the method comprising:
forming the cup member and the shaft member of medium carbon steel, the cup member being manufactured by preparing a cup member having a cylindrical portion and a bottom portion being integrally formed, and a fitting hole formed in a thick portion of the bottom portion in a machining step, the shaft member being manufactured by preparing a shaft member having a fitting outer surface formed at an end portion of the shaft member to be joined to the bottom portion of the cup member, which is formed in a machining step; fitting the fitting hole of the cup member to the fitting outer surface of the shaft member; and welding the cup member and the shaft member by radiating a beam from an inner side of the cup member to a fitted portion between the cup member and the shaft member, wherein the fitting hole of the cup member and the fitting outer surface of the shaft member are formed of a joining portion having a gap and a press-fitting portion having an interference, and an axial dimension of the joining portion is set to be larger than an axial dimension of the press-fitting portion, the joining portion serving as a press-fitting guide. |
