我厂加工机油泵外转子(图1),是以经过成形烧结、精整的复杂内孔为定位基准,为保证工件加工精度,我们设计制造了一种结构简单的夹紧心轴。心轴结构及使用方法磨削外圆的心轴(图2),在工作段圆柱面上,对应于工件内孔五瓣加 I plant processing machine oil pump outer rotor (Figure 1), is shaped by sintering, finishing the complex bore for the positioning of the base, in order to ensure the accuracy of the workpiece machining, we designed and manufactured a simple structure of the mandrel. Spindle structure and the use of grinding cylindrical mandrel (Figure 2), in the work section of the cylindrical surface, corresponding to the workpiece bore five plus