The Research On Optimization Of The Zipper Teeth Rolling Pass Design Based On CAE

China is the largest zipper producer in the world, however, Chinese zipper manufacturers can not fully grasp the core technology of this industry. A lot of important production equipment must rely on imports. And most of them can not complete technological innovation by themselves. The key technology lacking severely has constrained the development and expansion of Chinese enterprises.This topic comes from the cooperation of enterprise and our State Key Lab of Materials Processing and Die & Mould Technology HUST. It aims at solving the problem of rolling pass design which is the key technology of the high-end metal zipper manufacturing process. We not only use finite element analysis instead of relying solely on experience, but also provide a new idea to design the complex surface roll pass.In this paper, we make the production process of zipper tooth rough as the research object and simulate the copper cold rolling process by DEFORM finite element software. We optimize roll pass design with the simulation results, reduce the number of rolling and improve overall production efficiency. In addition, we test the program of optimal design rolling pass by self-made extrusion dies.After simulating the cold rolling process of H80 brass which has complex surface rigid-plastic with finite element method, testing the various impacts of relevant process parameters on cross-section size of rough, and analyzing the simulation results of velocity field which is obtained by roll bite into rough, we propose an optimization scheme of roller pass. This work successfully solves the problem of high hardening in the original program, reduces the number of rolling and decreases roll load.In order to investigate the results of optimal design rolling pass, the author has designed and manufactured a removable extrusion die instead of manufacturing rolls. This work greatly reduces design costs and improve design efficiency.