| 摘要 |
Provided is a method of manufacturing an outer joint member (11) of a constant velocity universal joint (10), the method including: forming a cup member (12a) and a shaft member (13a, 13b) of medium carbon steel; preparing, as the cup member (12a), a cup member (12a) having a cylindrical portion (12a1) and a bottom portion (12a2) integrally formed by forging, and a joining end surface (50) formed on an outer surface of the bottom portion (12a2) in a machining step after the forging; preparing, as the shaft member (13a, 13b), a shaft member (13a, 13b) having a joining end surface (51) to be joined to the bottom portion (12a2) of the cup member (12a), which is formed in a machining step; bringing the joining end surface (50) of the cup member (12a) and the joining end surface (51) of the shaft member (13a, 13b) into abutment against each other; and welding the cup member (12a) and the shaft member (13a, 13b) by radiating a beam from an outer side of the cup member (12a) to an abutment portion between the cup member (12a) and the shaft member (13a, 13b) in a radial direction of the cup member (12a), the joining end surface (50) and the joining end surface (51) having outer diameters (B) set to equal dimensions for each joint size. |
