我厂加工的柴油机零件板簧固定套如图1所示。该零件内孔两端各有装弹性档圈的环槽。车削Φ42.5环槽时,以内孔为基准看中拖板刻度进刀,由于Φ40内孔精车时需留磨量,且中拖板进刀时刻度也存在着误差,所以环槽尺寸不易保证。车成后用一般量具又无法测量,给加工带来一定难度。为解决这一问题,我们根据零件的环槽与端面距离较小这一 I plant the processing of diesel engine parts spring fixed sleeve shown in Figure 1. The parts at both ends of the hole have a flexible ring gear ring groove. Turning Φ42.5 ring groove, with the hole as a reference to see the carriage scale into the knife, as Φ40 hole when the fine car to be left to wear the amount, and the carriage when the scale is also there is an error, so the ring groove size is not easy Guarantee. After the car into a general measuring tool can not measure, to the processing of a certain degree of difficulty. To solve this problem, we based on the part of the ring groove and the end face distance smaller