我厂是齿轮专业生产厂，承接的产品中，有不少油泵齿轮轴。图 1是其中具有代表性的一种。由图可见，该齿轮轴轴颈部分过短，在滚齿机上，无法使用普通的顶尖、卡箍滚切该类齿轮轴齿部。使用内锥孔顶尖，存在工件定位精度差，夹持力小，更换麻烦等缺点。 　　我们经过对比分析， I plant is a professional gear factory, to undertake the products, there are many pump gear shaft. Figure 1 is one of the representative. As can be seen from the figure, the gear shaft journal portion is too short, on the gear hobbing machine, can not use the ordinary top, clamp hobbing such gear shaft tooth department. The use of the cone tip, there is poor positioning accuracy of the workpiece, clamping force is small, replacement and other shortcomings. After our comparative analysis,