为在车床上加工偏心轮,主要采用下列3种卡盘:1、两爪自定心卡盘,因其不能保证被加工表面具有足够的形状和相互位置精度,故应用甚少;2、三卡自定心卡盘,在加工时会产生显著的不平衡力,从而导致加工精度的下降和主轴支承过早的磨损; In order to process the eccentric on the lathe, the following three kinds of chucks are mainly used: 1. Since the two-claw self-centering chucks can not guarantee that the processed surface has sufficient shape and mutual position accuracy, applications are few; Card self-centering chuck, the processing will have a significant unbalanced force, resulting in decreased processing accuracy and spindle bearing premature wear;