工件的形状如图1所示,工件上的孔已在上道工序加工出来,这孔的精度为基孔制二级精度。现在要加工的是两个不同心的外园表面;这两个外园面的中心和孔的中心的偏心距各为5公厘和10公厘。这可以采用如图2的心轴。这种心轴和普通的心轴相同的地方是,它也带 The shape of the workpiece as shown in Figure 1, the hole on the workpiece has been processed in the last procedure, the accuracy of the hole for the hole secondary precision. The outer surface of the outer garden to be machined is now two different centers; the eccentricities between the centers of the two outer lands and the centers of the holes are 5 and 10 mm respectively. This can use the mandrel as shown in FIG. This kind of mandrel and common mandrel is the same place, it is also with