| 摘要 |
PURPOSE: To automate the manufacturing work of a yoke for an elastic universal joint and shorten machining time by facilitating the automation of stamping, bending, deep drawing, ironing, boring, and the like, and consisting of only processes requiring short time. CONSTITUTION: Stamping in a first process, bending in a second process, deep drawing in a third process, ironing in a fourth process, boring in a fifth process, adjusting the inner diameter dimension of a bored part in a sixth process, and diameter contracting work in a seventh process are respectively applied to obtain seventh intermediate material. Finally in an eighth process, mutually concentric circular holes 32, 33 are bored in the tip parts of a pair of arm parts 40, 40 forming the seventh intermediate material to obtain a yoke 81 for an elastic universal joint. Bearing cups 34, 34 forming radial needle bearings 33, 33 are fittingly fixed into the circular holes 32 of the yoke 81 thus completed. A cushioning cylinder is further fittingly fixed into a large diameter part of a cylindrical part 64b, and a required transmission piece or the like is mounted to complete the elastic universal joint. |
