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冲裁模的应用量大而面广,约占冲模总数的50％～60％,而冲裁间隙是冲裁模设计与制造中最重要的技术参数,它直接关系到冲件的断面质量、尺寸精度、模具寿命和力能消耗。实际生产表明,冲裁间隙的合理选用对冲压生产的技术经济效果有很大影响。现就使用国家技术监督局于1997年3月4日批准发布的GB/T16743—1997《冲裁间隙》标准(以下简称新标准)时遇到的问题谈点看法。 1.关于冲裁间隙的定义 新标准中对冲裁间隙给出的定义是“冲裁模具中凹模与凸模刃口侧壁之间缝隙的距离”。笔者认为,这个定义的前提必须是凹模与凸模刃口周边间隙百分之百的均匀,倘若周边间隙不均匀(这在模
The application of blanking die is large and wide, accounting for about 50% ~ 60% of the total number of blanking dies, and the blanking clearance is the most important technical parameter in blanking die design and manufacture, which is directly related to the cross-section quality of punch, Dimensional accuracy, die life and force can be consumed. The actual production shows that the reasonable selection of blanking clearance has great influence on the technical and economic effects of stamping production. Now on the use of the State Bureau of Technical Supervision on March 4, 1997 approved the release of GB / T16743-1997 “blanking gap” standard (hereinafter referred to as the new standard) to talk about the point of view. 1. Definition of blanking gap The new standard defines the blanking gap as “the distance between the die and the side wall of the punch edge in the blanking die”. The author believes that the premise of this definition must be uniform die and punch peripheral gap 100% uniform, if the gap around the uneven (which is in the mold