冲裁模设计中常常对模具的结构设计、各个零件的工艺性是否合理等问题比较重视;而却往往对凸、凹模之问间隙值选择不够注意。凸、凹模间隙值的合理性则直接影响工件的质量。合理的间隙值在不同的资料中推荐的有所不同。以前国内多数沿用苏联有关资料推荐的间隙值,一般间隙值偏小得多。这样,不但使工件质 Blast die design often mold structure design, the various parts of the process is reasonable and other issues more attention; but often on the convex and concave die gap value to choose less attention. The convex and concave die gap value of the rationality of a direct impact on the quality of the workpiece. Reasonable gap value in different materials recommended are different. In the past most of the domestic use of the Soviet Union clearance data recommended values, the general clearance value is much smaller. In this way, not only the quality of the workpiece