| 摘要 |
This method for manufacturing a ball joint is provided with: an assembly step (17) wherein a ball joint (J) is assembled; and a heating step (18) wherein, after the assembly step, the ball joint (J) is heated such that a bearing sheet (4) is softened. In the heating step (18), induction heating coils (26, 31) are disposed so as to surround a housing (5) of the ball joint (J), the housing (5) is heated by carrying electricity to the induction heating coils (26, 31), and the bearing sheet (4) is heated and softened by means of heat transfer from the inner circumferential surface of the housing (5) to the bearing sheet (4). Consequently, in the method for manufacturing a ball joint, the heating step can be performed within a relatively small space on the manufacturing line of the ball joint, furthermore, there is no material limitation of the bearing sheet formed of a thermoplastic resin, and the bearing sheet can be efficiently and correctly heated with electricity. |
