Rolling force model and revamping of tandem cold strip mill

Process control system for cold rolling requires the applied mathematics models being precise description of rolling laws,simpler in computation,and predictive with favorable accuracy.Rolling force calculation model is the core of the rolling process control models and its accuracy directly affects the shape and gauge control performance.In order to improve the calculation accuracy of rolling force model,analysis of the characteristics of rolling force and the investigation on the rolling force calculation model in tandem cold strip mill are carried out and a modified Hill model,associated with tension effect and self-learning coefficient,is proposed as online control model for the cold rolling process.Practical results show that the prediction error of the online model is less than ±5%.