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在车床上加工偏心轮方法有三。(1)两爪自定心卡盘,山亍它不能达到加工表面相互位置和形状精度,故很少使用;(2)三爪自定心卡盘,由于加工时产生很大的不平衡力,导致加工精度降低和主轴轴承过早磨损;(3)四爪卡盘,有独立的移动卡爪,由于用它增加了调整毛坯的辅助时间,在加工批量大的零件时十分不利,加之由于作用在两爪上的扭矩(图1a,M=Pe,P 为夹紧力,e 为偏心距),降低了加工精度。基洛夫厂加工偏心轴是在三爪自定心卡盘上采用专用卡爪。这种卡爪1(图2)可在卡盘体的槽内移动,
There are three ways to machine the eccentric on a lathe. (1) two-claw self-centering chuck, it does not reach the foot of the surface of the processing surface mutual accuracy of position and shape, it is rarely used; (2) three-jaw self-centering chuck, due to the processing of a large unbalanced force , Resulting in lower machining accuracy and premature wear of the spindle bearings; (3) four-jaw chuck, an independent mobile jaw, as it increases the auxiliary time to adjust the blank, processing large quantities of parts is very unfavorable, coupled with due to The torque acting on both jaws (Fig. 1a, M = Pe, P is the clamping force, and e is the eccentricity) reduce the machining accuracy. Kirov plant processing eccentric shaft is in the three-jaw self-centering chuck on the use of special jaws. This pawl 1 (Figure 2) is movable in the groove of the chuck body,