众所周知,根据图纸已知条件计算必要的工艺尺寸是机械加工中常遇的情况。能否及时准确地完成计算工作,对于缩短辅助工时,提高生产效率,保证产品质量都有直接的影响。在双角度斜面零件中,由于斜面与基准面不平行(或不垂直),加工时往往不能直接使用原 As we all know, according to the drawings known conditions to calculate the necessary process size is often encountered in machining. The timely and accurate completion of the calculation work can shorten the auxiliary work hours, increase production efficiency and ensure the quality of products has a direct impact. In the double-angle bevel parts, because the bevel and the reference plane are not parallel (or not vertical), processing often can not be used directly