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<p>The basic model for controlling longitudinal thickness deviation has been improved by introducing a&#xa0;graphical solution to a&#xa0;system of two equations, enabling precise adjustment of the longitudinal thickness profile in the finishing stand of a&#xa0;wide-strip cold rolling mill depending on the key process parameters influencing the rolling force. Representing this system with both linear and polynomial equations confirms the validity of the graphical method and facilitates the determination of strip thickness, longitudinal thickness deviation, and the appropriate control actions on the process parameters of the cold rolling process. The improved model was validated by comparing the calculated and measured average values of longitudinal thickness deviation of cold-rolled strips of final thickness on an operating continuous wide-strip mill. The results demonstrate that increasing the front and back specific tensions in the finishing stand reduces longitudinal thickness fluctuations of the rolled strip to within the specified tolerance from the nominal thickness.</p>

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Improvement of the control model for the longitudinal thickness deviation of the strip in the finishing stand of a wide-strip cold rolling mill

  • 期刊论文

  • 发表日期：

    2025年8月26日

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  • Ivan D. Pospelov

摘要

The basic model for controlling longitudinal thickness deviation has been improved by introducing a graphical solution to a system of two equations, enabling precise adjustment of the longitudinal thickness profile in the finishing stand of a wide-strip cold rolling mill depending on the key process parameters influencing the rolling force. Representing this system with both linear and polynomial equations confirms the validity of the graphical method and facilitates the determination of strip thickness, longitudinal thickness deviation, and the appropriate control actions on the process parameters of the cold rolling process. The improved model was validated by comparing the calculated and measured average values of longitudinal thickness deviation of cold-rolled strips of final thickness on an operating continuous wide-strip mill. The results demonstrate that increasing the front and back specific tensions in the finishing stand reduces longitudinal thickness fluctuations of the rolled strip to within the specified tolerance from the nominal thickness.