1 School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China 2 Tangshan Donghua Steel Enterprise Group Co., Ltd., Tangshan 063210, Hebei, China 3 National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083, China
Improvement in shape control performance of finishing mills in endless rolling production line
1 School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China 2 Tangshan Donghua Steel Enterprise Group Co., Ltd., Tangshan 063210, Hebei, China 3 National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083, China
摘要 Donghua steel continuous casting–rolling (DSCCR) production line is an endless rolling production line independently integrated and developed by a Chinese enterprise. To solve the problem of out-of-control shape caused by insufficient adjustment ability of work roll bending force of DSCCR finishing mills, the backup roll contours of the finishing mill were optimized considering multi-objectives, and varying contact length backup roll (VCR) contours matching the concave work rolls were designed based on the rapid rolls–strip deformation calculation model, which integrated the elastic deformation of the rolls and the fast plastic deformation of the rolled strip. The simulation results showed that VCR configuration can significantly enhance the control efficiency of the work roll bending force and increase the transverse stiffness of rolling mill compared with the conventional roll configuration. In addition, VCR backup roll can improve the contact state between backup roll and work roll. The industrial production showed that the bending force setup value was more reasonable and the strip crown control accuracy was improved.
Abstract:Donghua steel continuous casting–rolling (DSCCR) production line is an endless rolling production line independently integrated and developed by a Chinese enterprise. To solve the problem of out-of-control shape caused by insufficient adjustment ability of work roll bending force of DSCCR finishing mills, the backup roll contours of the finishing mill were optimized considering multi-objectives, and varying contact length backup roll (VCR) contours matching the concave work rolls were designed based on the rapid rolls–strip deformation calculation model, which integrated the elastic deformation of the rolls and the fast plastic deformation of the rolled strip. The simulation results showed that VCR configuration can significantly enhance the control efficiency of the work roll bending force and increase the transverse stiffness of rolling mill compared with the conventional roll configuration. In addition, VCR backup roll can improve the contact state between backup roll and work roll. The industrial production showed that the bending force setup value was more reasonable and the strip crown control accuracy was improved.
Zhao-yang Li,Zhi Qi,Lan-tian Guo, et al. Improvement in shape control performance of finishing mills in endless rolling production line[J]. Journal of Iron and Steel Research International, 2023, 30(02): 267-276.