一、冲裁间隙的重要作用冲裁间隙在冲裁模设计时是一个很重要的参数。冲裁间隙的选择是否合理,直接影响冲件断面的质量、冲件尺寸精度、冲裁时的冲裁力、卸料力、推件力及模具寿命。以前我们一直采用四机部第四研究所编写的《冷压冲模设计》一书作为主要设计参考资料。这本书中有很多数据来源于苏联的旧资料,所推荐的冲裁间隙都偏小。使用该书的冲裁间隙设计的冲模,冲薄料时模具容易出现啃口、凹模胀裂、落料堵塞等问题, First, the important role of blanking clearance Blanking clearance in the blanking die design is a very important parameter. The choice of blanking clearance is reasonable, which directly affects the quality of blanking section, blanking dimensional accuracy, blanking force at blanking, unloading force, pushing force and die life. In the past, we have been using the “Cold Press Die Design” written by the Fourth Institute of the Fourth Machine Division as the main design reference. Much of the data in this book comes from the old Soviet sources, with the recommended blanking gaps being small. The use of the book blanking gap design of the die, punching thin material prone to die mouth, die burst, blanking plugging and other issues,