Abstract: With the improving requirement for shape control accuracy and development of shape control technology, asymmetric shape defects become an increasingly concerned problem to strip quality control. On the basis of the new technique of asymmetric shape control device, anti-symmetric roll bending for universal crown mill (UCM) cold mill, in this article, with ANSYS finite element simulation method, high-precision rolls-strip coupling models are established, and the difference of control character among all the symmetric and asymmetric shape control methods are analyzed on the whole strip width range, which are quantitative expressed by shape control efficiency vectors. Then generalized overall shape control strategy based on shape control efficiency vectors is proposed and whole shape setting control models and closed-loop models are designed. It is proved by simulation experiment that the control strategy can effectively control the shape defects in complex modes with the coordination of all the symmetric and asymmetric shape control methods. Consequently, expansive research and apply prospect is expected.

Key words: Asymmetric shape defect, Rolls-strip coupling model, Shape control efficiency vector, Shape control strategy, Universal crown mill