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(一)设计要素 1.精冲间隙 合理的精冲间隙能在保证裁切面质量的前提下有效的延长模具寿命。国外有些专业公司认为,精冲的间隙应尽量小。根据精冲材料的厚度和性能,推荐取0.005～0.025毫米。这样小的冲裁间隙会增加制模困难、加大精冲时模具的荷载和磨损,因而降低模具寿命。实践证明,精冲间隙随料厚加厚可以在一定范围内加大,但必须均匀。1974年末
(A) the design elements 1 fine blanking gap reasonable fine blanking gap in the premise of ensuring the quality of the cut surface effectively extend die life. Some foreign professional companies think that fine blanking the gap should be as small as possible. According to the thickness and performance of fine blanking material, it is recommended to take 0.005 ~ 0.025 mm. Such a small blanking gap will increase the mold making difficulty, increase the mold load and wear when fine punching, thus reducing the mold life. Practice has proved that fine blanking gap with material thickening can be increased within a certain range, but must be uniform. Late 1974