在设备修理中,经常要加工一些同轴度、平行度及位移度要求高的轴和偏心轴类工件。这类工件数量少,规格多,加工麻烦,质量较难保证。轴类工件,一般在普通车床上车端面,分别打二端中心孔,加工中用多次调头装夹的方法达到同轴度要求,工件装夹频繁,效率低。而偏心轴类工件,一般是先加工好同轴心的各外表面,再在三爪卡盘上用加垫片的方法或用四爪卡 In equipment repair, often need to process some coaxial, parallelism and degree of displacement demanding shaft and eccentric shaft type workpiece. Such a small number of workpieces, specifications, processing trouble, quality is more difficult to guarantee. Shaft workpieces, usually in the ordinary lathe car end face, respectively, hit the two ends of the center hole, the process of using multiple U-turn clamping method to achieve the coaxial requirements, workpiece clamping frequently, inefficient. The eccentric shaft of the workpiece, the general is the first processing of the outer surface of the coaxial center, and then in the three-jaw chuck with the method of adding pads or four-jaw card