在车床上加工零件时,往往碰到在同一平面上加工两个孔或更多的孔。一般加工的方法,是在花盘上用压板压着带有心轴的平板,零件事先加工好一个孔,套在心轴上定位,然后加工另一个孔。用这种方法的缺点是:平板在花盘上受压板的压力,校正孔距时移动平板要用手鎯头敲打,影响车床几何精度, When machining parts on a lathe, you often encounter holes that process two or more holes on the same plane. The general processing method is pressed on the faceplate with a mandrel with a flat plate, parts pre-machined a hole, set in the mandrel positioning, and then processing the other hole. The disadvantage of using this method is: plate pressure on the plate by the pressure plate, moving the hole to correct the hole distance to beat with a hand pound head, affecting the lathe geometry accuracy,