的轴部，以提供多个具有产量的放大直径部分轴构件中的锻造方法和提高的等速万向接头，由此减少了的精度和制造成本轴构件。 在等速万向的轴部件13a的锻造方法的轴部60接头10，20，其具有多个扩大部分61和62的，锻造过程中，多个直径扩大部分61和62的一部分 是模制其余部分预成型的铸件工业B”的扩径部62，作为用于模制的平衡，在冲头81的直径扩大部62的模具的那些直径扩大部61，制成材料B “分割冲模83的成型面83a容纳扩径部61和轴部60的一部分，制成材料B”安装在冲头81的直径扩大部61的部分的压力 包括工件接收部件84，用于支撑，形成部61扩径的一部分“放置工件容纳构件84中，形成和制造材料B以关闭分割金属模具83后”和制造该径向地形成材料B 约束，在这种状态下，背景的通过压力，以满足所形成的和制造的材料B“在分割的成型面83a模具，其特征在于用于由冲头81成形图的剩余部分的直径扩大部分62 12

The present invention in an axial section to provide a forging method of a plurality of shaft members having an enlarged diameter portion of the yield and increase accuracy and manufacturing cost shaft member of the constant velocity universal joint thereby reducing the.
The A shaft portion 60 in the forging method of the shaft member 13a of the constant velocity universal joint 10, 20 having a plurality of radially enlarged portions 61 and 62, the forging process, some of the plurality of enlarged diameter portions 61 and 62 are those enlarged diameter portion 61 of molding the enlarged diameter portion 62 of the remainder to preformed industrial castings B ', as a mold for molding the enlarged diameter portion 62 of the balance, the punch 81, formed and fabricated material B "and split die 83 having a molding surface 83a together to accommodate a part of the enlarged diameter portion 61 and the shaft portion 60 of the, formed and fabricated material B" the pressure of mounting the part of the enlarged diameter portion 61 of the punch 81 equipped with a work receiving member 84 to support, "after you placed on the work receiving member 84, formed and fabricated material B to close the split die 83" part of the enlarged diameter portion 61 is formed and fabricated material B which is molded radially restrained, in this state, it is characterized in that the pressure of the punch 81 to satisfy the industrial castings B "on the molding surface 83a of the split die for molding the enlarged diameter portion 62 of the remainder.
.The 12