我厂生产联合采煤机的叶片式变量油泵和液压马达中,有如图1所示的导向环零件。此零件由GCr15钢制造,要求(1)φ80D_1、φ145与φ135D不同心度允差0.005毫米;(2)A、B两端面不平行度允差0.005毫米;(3)C端面对A面圆周不平行度允差0.005毫米,C端面对A面径向不平行度允差0.002毫米;(4)热处理硬度R_C58～62。所以要求较高,尤其是沟槽加工是关键。经过三结合的多次试验,掌握了沟槽磨削的方法,现将沟槽磨削介绍于下: I plant production of coal shearer blades vane pumps and hydraulic motors, as shown in Figure 1, the guide ring parts. This part is made of GCr15 steel and requires (1) φ80D_1, φ145 and φ135D with different concentricity tolerances of 0.005 mm; (2) A and B are not permitted to have a parallelism tolerance of 0.005 mm; (3) Non-parallel tolerance of 0.005 mm, C-side of the A-surface radial non-parallel tolerance of 0.002 mm; (4) heat treatment hardness R_C58 ~ 62. So demanding, especially the trench processing is the key. After three combined multiple tests, grasping the method of groove grinding, groove grinding is now introduced in the next: