论文部分内容阅读
指导性技术文件《JB/Z271-86冲载间隙》,已于1986年9月10日由原机械部批准发布并在全国开始使用。为使这个文件更完善、更具权威性,现将我们经过长期学习和使用该文件过程中遇到的一些问题提出来与有关同行专家和教授们商榷,并根据笔者的浅见提出若干不成熟的修改意见与建议,供参考。有不当之处,敬请同行专家、教授以及广大读者不吝指正。一、概述众所周知,用冲裁模在板料上冲孔或落料时,凹、凸模刃口之间需要有一定的尺寸差,以便于凸模和四模在足够的冲压力作用下分离板料。冲裁
Guidance technical document “JB / Z271-86 Chong load gap”, was September 10, 1986 approved by the former Ministry of Machinery released and started using the country. In order to make this document more complete and authoritative, we now put forward some problems that we encountered through long-term study and use of the document to discuss with relevant experts and professors, and based on my humble opinion, put forward some immature Modify comments and suggestions for reference. There are inappropriate, please peer experts, professors and readers do not hesitate to correct me. First, an overview As we all know, blanking die punching or blanking sheet, concave, punch between the need for a certain size difference in order to punch and die in the role of sufficient stamping force separation Sheet. Blanking