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连杆大小头孔的加工一般均在基准加工的基础上再作过渡加工,其目的是切去余量、消除加工应力和防止大头孔变形,以便进行精镗。国内近期流行的两种工艺流程如表1(自动线除外):
Link size head hole processing are generally based on the basis of processing and then for transitional processing, the purpose is to cut off the margin, to eliminate the processing stress and prevent the deformation of the large hole in order to fine boring. Two popular domestic recent process shown in Table 1 (except for automatic lines):