带有偏心凸轮的轴类零件,在加工过程中通常要在两端各钻两个中心孔,其中一个为偏心凸轮的中心孔。钻偏心中心孔,过去多采用划线钻孔的方法。它有两个缺点:偏心中心孔的偏心距精度和两端偏心孔的“相位”精度很难保证;工件较长时,如无合适机床,偏心孔也不易钻。为此,我们改在铣端面打中心孔机 Shafts with eccentric cams typically have two center holes drilled at each end during machining, one of which is the center hole of the eccentric cam. Drill eccentric center hole, the past use of crossed drilling method. It has two disadvantages: the eccentricity of the eccentric center hole and the precision of the “phase” of the eccentric hole at both ends are hard to guarantee; when the workpiece is long, the eccentric hole is not easy to drill if there is no suitable machine tool. To this end, we change the surface milling center hole machine