Roll gap setting model and experiment for rolling sheet with variable gauge zone
Author(s):YU Wei, SUN Guangjie, ZHANG Fei, National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing Pages:41-45 Year:2014
Issue:3 Journal:Materials Science and Technology Keyword:model; sheet; roll gap setting; discretization; variable gauge zone rolling; Abstract:For the purpose of high accuracy variable gauge rolling,the gauge control model should be studied.A roll gap setting model for variable gauge rolling is established based on the discretization control idea and spring equation for rolling mill,and used in the gauge control system of a reversible four high cold rolling mill.The roll gap nonlinear law is studied and the discrete interval is determined by the method of error analysis. A TRB roll gap control system structure,and a load-free closed-loop and loaded roll gap closed-loop control formula is built. The single variable gauge zone TRB sheets are rolled by laboratory four high cold rolling mill.The results show that the maximum thickness deviation in 50 mm variable gauge zone of TRB sheet is below0. 08 mm,and the length deviation below 1 mm by the roll gap setting control method.