图1所示系一种组合钻床圆工作台的定位套,因维修需要生产少量的配件。其主要加工难点是高精度的偏心距,要达到2.1±0.005毫米。最后的磨加工设备均选用一台万能外圆磨床。若磨工序采取“先孔后外圆”的顺序,即先磨孔,后用偏心轴夹具,以孔定位再磨出外圆到图样要求,这是极困 Figure 1 shows a combination of drill round table positioning sleeve, need to produce a small amount of maintenance parts. The main processing difficulties are high-precision eccentricity, to reach 2.1 ± 0.005 mm. The last mill processing equipment are selected a universal cylindrical grinder. If the grinding process to take “the first hole after the outer circle,” the order, that is, first grinding hole, after the eccentric shaft fixture to hole location and then grinding the outer circle to the pattern requirements, which is extremely difficult