Research and Application of Roll Shifting Strategy and Comprehensive Contour in Hot Strip Mill
LI Wei-gang1,2,GUO Zhao-hui2,LIU Xiang-hua3
1. College of Information Science and Engineering, Northeastern University, Shenyang 110819, Liaoning, China 2. Automation Division, Research Institute, Baoshan Iron and Steel Co., Ltd., Shanghai 201900, China 3. Research Institute of Science and Technology, Northeastern University, Shenyang 110819, Liaoning, China
Abstract：The effect of roll shifting strategy on roll comprehensive contour in hot strip mill was investigated,and a multi-objective optimization model for roll shifting strategy was presented. Taking roll wear contour, roll thermal contour and roll ground contour into account, the effect of different roll shifting strategy on comprehensive contour was studied by numerical simulation, and two evaluation indexes including body smoothness and edge smoothness were presented. Body smoothness average and edge smoothness average of all strips were selected as optimization objectives, and the multi-objective method of NSGA-II as the optimizer, and then a multi-objective optimization model for roll shifting strategy was built. The results show work roll shifting can smooth roll wear contour and thermal contour, and roll shifting strategy with varying stroke can gain the dish-shaped roll comprehensive contour without local cat ear, and it is helpful to achieve schedule free rolling. Finally, practical application cases confirm the validity of the optimal shifting strategy and related model, and it can improve strip profile, and extend the rolling miles of rolling campaigns.
李维刚,，郭朝晖，刘相华. 热轧带钢窜辊策略与综合辊型的研究及应用[J]. 钢铁, 2012, 47(9): 43-49.
LI Wei-gang1,2,GUO Zhao-hui2,LIU Xiang-hua3. Research and Application of Roll Shifting Strategy and Comprehensive Contour in Hot Strip Mill. Iron and Steel, 2012, 47(9): 43-49.
2012, Vol. 47 
