Permissible Minimum Thickness in Asymmetrical Cold Rolling  

作　　者：TANG De-lin LIU Xiang-hua LI Xiang-yu PENG Liang-gui 

机构地区：[1]State Key Laboratory of Rolling and Automation Laboratory,Northeastern University

出　　处：《Journal of Iron and Steel Research International》2013年第11期21-26,共6页

基　　金：Sponsored by National Natural Science Foundation of China(50974039)

摘　　要：The minimum rolling thickness in asymmetrical rolling was analyzed compared with that in symmetrical rolling. The differential equilibrium equations on forces were established to calculate the asymmetrical rolling force equation by slab method. An implicit expression of the minimum rolling thickness was then derived from the rolling force equation and Hitehcock equation. The results show that permissible minimum rolling thickness of asymmetrical rolling only exists within a specific range of cross-shear ratio, which is termed the cross-shear zone proportion of the whole de- formation zone. Numerical computation was carried out to obtain a discrete solution of the minimum rolling thick- ness. Experiments were designed to investigate the influence factors on cross-shear ratio. Finally, experimental re- sults prove the correctness of the improved formula given.The minimum rolling thickness in asymmetrical rolling was analyzed compared with that in symmetrical rolling. The differential equilibrium equations on forces were established to calculate the asymmetrical rolling force equation by slab method. An implicit expression of the minimum rolling thickness was then derived from the rolling force equation and Hitehcock equation. The results show that permissible minimum rolling thickness of asymmetrical rolling only exists within a specific range of cross-shear ratio, which is termed the cross-shear zone proportion of the whole de- formation zone. Numerical computation was carried out to obtain a discrete solution of the minimum rolling thick- ness. Experiments were designed to investigate the influence factors on cross-shear ratio. Finally, experimental re- sults prove the correctness of the improved formula given.

关 键 词：asymmetrical roiling minimum permissible thickness cross-shear ratio asymmetrical ratio friction peak value 

分 类 号：TG335.12[金属学及工艺—金属压力加工]