Thermal Crown Model and Shifting Effect Analysis of Work Roll in Hot Strip Mills  

作　　者：Shui-xuan CHEN Wei-gang LI Xiang-hua LIU 

机构地区：[1]School of Mechanical and Automotive Engineering,Xiamen University of Technology [2]College of Information Science and Engineering,Wuhan University of Science and Technology [3]Research Institute of Science and Technology,Northeastern University

出　　处：《Journal of Iron and Steel Research International》2015年第9期777-784,共8页

基　　金：Sponsored by National Natural Science Foundation of China(51205336);Fujian Natural Science Foundation of China(2013J05086)

摘　　要：Considering the effect of work roll shifting on roll temperature field,a finite difference method of PR format for roll temperature field was presented,which can meet the requirements of accuracy and speed of online calculation.The step-by-step accumulation method was used to simulate the roll temperature field and thermal crown,and the evolution of roll thermal crown in a rolling campaign was studied.And then,the effects of strip width,rolling rhythm and work roll shifting on roll thermal crown were analyzed.It is found that work roll shifting can disperse the thermal expansion of the roll body especially the edge to make roll thermal contour uniform.The effect of work roll shifting on roll thermal crown is mainly concentrated in regions around twice of roll shifting stroke,and the change range of roll thermal crown is±30μm or so in the same roll body location.Considering the effect of work roll shifting on roll temperature field,a finite difference method of PR format for roll temperature field was presented,which can meet the requirements of accuracy and speed of online calculation.The step-by-step accumulation method was used to simulate the roll temperature field and thermal crown,and the evolution of roll thermal crown in a rolling campaign was studied.And then,the effects of strip width,rolling rhythm and work roll shifting on roll thermal crown were analyzed.It is found that work roll shifting can disperse the thermal expansion of the roll body especially the edge to make roll thermal contour uniform.The effect of work roll shifting on roll thermal crown is mainly concentrated in regions around twice of roll shifting stroke,and the change range of roll thermal crown is±30μm or so in the same roll body location.

关 键 词：hot strip mill work roll temperature field thermal crown work roll shifting 

分 类 号：TG335.5[金属学及工艺—金属压力加工]