在采煤机械孔加工中,常常会遇到很多环沟,如附图工件1。环沟主要是安装挡圈起定位作用,或者安装密封圈起密封作用。尺寸精度高,有些环沟距离行孔端面很远,加工时,只能用试切法来控制环沟的深浅,需要多次进刀、退刀、测量、再进刀,直至加工好为止。耗时费力,却难保证环沟加工精 In the mining machinery hole processing, often encounter a lot of ring groove, as shown in Figure 1 workpiece. Ring groove is mainly installed from the role of retaining ring, or seal ring installation role. Dimensional accuracy is high, some ring and groove away from the end face of the hole is far, processing, can only be used to control the trial cut method of the depth of the groove, you need to repeatedly feed, retraction, measurement, and then into the knife until processed. Time-consuming, but hard to guarantee ring groove processing