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薄壁件在车削时容易变形。引起变形的原因是工件坯料的内应力和由于夹持力不匀而产生的外应力。因此,一般在车削前先对坯料进行退火或回火处理,以消除其内应力。而消除外应力的方法是:在精车前松动一次夹具或调整一下工件位置后再夹紧。这样能起到减少和改善薄壁工件变形的作用,但这种方法不易控制。现将简便易行释放外应力的加工方法介绍如下: 1.粗车端面、外径和内径(应留半精车余量),车削外径和内径的长度均应大于工件的长度(见附图)。 2.松动一次夹具,半精车端面、外径和内径(车削长度同上)。 3.按工件长度割槽,槽底外径不得小于精车后的
Thin-walled parts are easily deformed during turning. The cause of the deformation is the internal stress of the workpiece blank and the external stress due to the uneven clamping force. Therefore, generally before turning the blank annealing or tempering treatment to eliminate the internal stress. The method to eliminate external stress is: loose a fixture in the fine car or adjust the position of the workpiece after clamping. This can play a role in reducing and improving the deformation of thin-walled parts, but this method is not easy to control. Now simple and easy to release external stress processing methods are described below: 1. Crude car end, outer diameter and inner diameter (should remain semi-fine car allowance), turning outside diameter and the length of the inner diameter should be greater than the length of the workpiece (see attached Figure). 2. Loosen a fixture, semi-fine car end, outer diameter and inner diameter (turning length above). 3. According to the length of the workpiece cutting slot, the bottom diameter of not less than fine car after