| 摘要 |
Provided is a manufacturing method for an outer joint member (11) of a constant velocity universal joint (10), the manufacturing method comprising: forming a cup member (12a) and a shaft member (13a) of medium carbon steel; performing, as manufacturing steps, a machining step and a heat treatment step on the cup member (12a) after integrally forming a tubular portion (12a1) and a bottom portion (12a2) of the cup member (12a) by forging, the machining step comprising forming a joining hole (50) in a thickness of the bottom portion (12a2) to prepare the cup member (12a) as a finished component; performing, as manufacturing steps, a machining step and a heat treatment step on the shaft member (13a), the machining step for the shaft member (13a) comprising forming a joining outer surface (51) on an end portion of the shaft member (13a) to be joined onto the bottom portion (12a2) of the cup member (12a) to prepare the shaft member (13a) as a finished component; fitting the joining hole (50) of the cup member (12a) as the finished component and the joining outer surface (51) of the shaft member (13a) as the finished component to each other; and welding a fitting portion (60) between the joining hole (50) and the joining outer surface (51) through irradiation of a beam from an inner side of the cup member (12a), a diameter of the fitting portion (60) being set to an equal dimension for each joint size. |
