Analysis of flatness actuator efficiencies of SmartCrown mill
LI Kang1, LI Xu1, LI Xiaohua1, WANG Qinglong2, HAN Yuejiao1
1. The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China; 2. Department of Mechanical Engineering, North China Electric Power University, Baoding 071003, Hebei, China
Abstract：Cold-rolled strip is popular because of its excellent characteristics, among which the flatness is an important index to measure the quality of cold rolled strip products. As an emerging flatness control technology, SmartCrown technology has a good flatness control effect. It is of great significance to study and analyze the flatness control effect of the flatness actuators of SmartCrown mill for adjusting strip flatness and improving the quality of strip products. The 1 740 mm strip cold rolling production line of a factory is taken as the research object. The finite element simulation model of SmartCrown mill is established by using the large finite element analysis software ANSYS/LS-DYNA, and the adjustment amount of flatness actuators such as intermediate roll shifting,work roll bending and intermediate roll bending is set in equal parts within the allowable range of the project. The finite element platform is used to simulate strip rolling experiment and the post-processing analysis is carried out. The influence of flatness actuators on the thickness profile of strip,the crown and edge drop of strip,relative thickness difference of the strip thickness profile and relative length difference of the strip longitudinal fibers were systematically analyzed. On this basis, curves of flatness actuator efficiency factors are obtained by calculation and fitted by six Legendre orthogonal polynomials to obtain the absolute values of fitting coefficients. The flatness control components of flatness actuators are compared to quantitatively analyze the flatness control characteristics of the flatness actuators. The results show that the flatness control ability of intermediate roll shifting is the strongest, followed by working roll bending, and intermediate roll bending is the weakest. The control ability of the three flatness actuators to the secondary flatness defects is stronger than that of the fourth and sixth flatness defects, which can provide reference for the production of cold rolled strip.
李康, 李旭, 李晓华, 王青龙, 韩月娇. SmartCrown轧机板形执行机构调控功效分析[J]. 钢铁, 2023, 58(9): 148-156.
LI Kang, LI Xu, LI Xiaohua, WANG Qinglong, HAN Yuejiao. Analysis of flatness actuator efficiencies of SmartCrown mill[J]. Iron and Steel, 2023, 58(9): 148-156.
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2023, Vol. 58 
