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我厂年产各种干式气缸套达86万只(见图1),且加工质量要求越来越高。干式气缸套在机械加工中最难达到的技术要求,就是支承肩下端面对缸套外径的跳动以及内、外圆的壁厚差和形位公差要求。以前,我厂通常采用弹簧套筒夹具和液性塑料夹具装夹加工,由于弹性弹簧套筒存在着制造精度难以保证的问题,从而造成自动定心精度难以控制。而液性塑料夹具对切削热相当敏感,并且塑料容易老化,制造过程中塑料成分配比又极为严格,虽然其定心
I plant an annual output of all kinds of dry cylinder up to 860000 (see Figure 1), and the processing quality requirements are getting higher and higher. Dry cylinder liner in the machining of the most difficult to meet the technical requirements, that is, supporting the shoulder end surface of the outer diameter of the cylinder runout, as well as the inner and outer wall thickness difference and shape tolerance requirements. Previously, our factory usually used the spring sleeve fixture and the liquid plastic fixture to clamp the processing. Because the elastic spring sleeve has the problem that the manufacturing precision is difficult to be guaranteed, the automatic centering accuracy is difficult to control. The liquid plastic fixture is very sensitive to cutting heat, and plastic easy to aging, the manufacturing process of plastic composition and extremely strict, although its centering