The Mathematical Models and Simulation on Work Roll Bending Control System of Cold Rolling Mill

摘要

One of the key parameters for cold rolling strip is flatness. Roll bending, which its precision affect directly the crown of cold rolling strip exit side of the rolling mill, is the most efficient device in all the profile control devices. It is one of the most effective methods which can guarantee the shape quality in the production of cold rolling strip. The roll bending system involves in automatic control technology, hydraulic servo technology, fluid dynamics and rolls deformation. The calculated result 01 the mathematical model based on the conventional transfer function has bigger deviation than took into account the influence of the dynamic performance of pipes and the characteristic of one servo valve with several tending cylinders. The modeling is different irom conventional modeling used many ve with several Dending cylinders, The modeling is different from conventional modeling used many presumptions and linear processing. The modeling calculated accurately the equivalent load spring using the method of influence function. Simulation of the work roll bending system was performed using SIMULINiC model in MATLAB. The simulation results agree well with actual data of the bending system.The model was proven to be suitable for the real work roll bending system. The mathematical model in this paper provided the basis for the research of the work roll bending system with high accuracy. Ihe equipment performances can be calculated using this model. It could be used to guide production practice and new product development.