我厂曾承接设计制造如图１所示的孔内凸对称三角形检具，因三角形块半角误差要求较严，制造有一定难度。一、几何尺寸Ｎ、Ｋ的计算由图１、图２、图３、图４知：由上述可得：二、制造工艺１．套（见图１）的加工工艺车→划线→插键槽→钻孔→淬火→平磨端面→磨内孔→研键槽。 I plant has been to undertake the design and manufacture as shown in Figure 1 within the hole convex symmetry triangle gage, triangle block error due to the more stringent requirements, create a certain degree of difficulty. First, the geometric dimensions N, K calculation from Figure 1, Figure 2, Figure 3, Figure 4: From the above available: Second, the manufacturing process 1. Set (see Figure 1) of the processing car → scribe → keyway → drilling → quenching → flat grinding face → grinding bore → grinding keyway.