1问题的提出在转轴的加工中，一般都要先加工中心孔，在普通的小工厂中一般都用探臂钻床或直接在车床上来加工，所以往往中心孔的位置不准，两端中心孔的同轴度较差，造成后面的加工困难。而且转轴一般中间部位较粗，而转轴往往有弯曲的情况存在，这样就容易造成中间部分的加工 1 raised the problem in the processing of the shaft, generally have to first machining center hole in the ordinary small factories are generally used to drill or drill directly on the machine, so often the location of the center hole is not allowed, both ends of the center hole The poor coaxiality, resulting in the back of the processing difficulties. And the shaft is generally thicker middle part, and the shaft tends to have a bending condition, so easy to cause the middle part of the processing