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在以内孔定位的一组短套类零件的加工中,当各零件内孔实际尺寸相差较大时,用图示弹性芯轴即可将这组零件夹紧,并能保证各零件得到较高的定位精度。这比用刚性芯轴夹紧时,靠提高被加工零件内孔尺寸精度来保证较高定位精度的方法要经济得多。其夹紧过程如下:旋紧螺母2,将开口压板3向下压,在压板3还没有接触工件8之前,上导套4先将压力依次传递给下面各“O”型橡胶圈6和中间导套5,橡胶圈受压后向外胀开,并与工件内孔紧密接触,从而使各零件以芯轴7为基准定位。继续旋紧螺母2,压板接触工件,并将工件夹紧。螺钉1是用来当加工完毕后取出工件时,防止将导套也带出芯轴而设置的。
In the processing of a set of short sleeve type parts with inner holes, when the actual sizes of the inner parts of the parts differ greatly, the set of parts can be clamped by the illustrated elastic mandrel and the parts can be guaranteed to be higher The positioning accuracy. This is much more economical than using a rigid mandrel to secure high positioning accuracy by increasing the dimensional accuracy of the hole being machined. The clamping process is as follows: tighten the nut 2, the pressure plate 3 is pressed down, before the pressure plate 3 has not yet contacted the workpiece 8, the upper guide sleeve 4 will be followed by the first pressure to the following “O” rubber ring 6 and the middle Guide sleeve 5, the rubber ring outward expansion after pressure and in close contact with the workpiece bore, so that the parts to the mandrel 7 as a benchmark positioning. Continue to tighten the nut 2, the platen contacts the workpiece and clamps the workpiece. Screw 1 is used when the workpiece is removed after processing to prevent the guide sleeve is also set out of the mandrel.