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Abstract <p>The mechanism of combined control of the profile and flatness of cold-rolled strips using CVC (Continuously Variable Crown) and WRB (Work Roll Bending) systems has been investigated. It was established that the combination of these systems provides formation of various types of strip profile through controlled deformation across the width. An example of joint regulation by the CVC and WRB systems during rolling of strip on an industrial four-stand 2100 mill is presented, with control of the distribution of elongation (strain) across the width. It is shown that, based on measurements from the flatness-measuring rollers in the first stand, the CVC and WRB systems can operate jointly to equalize elongation across the width; in the intermediate stands—to stabilize stresses; and in the last stand of the mill—to finalize flatness formation. The obtained results provide a basis for the development of empirical research methods and mathematical descriptions of cold-rolled strip flatness, enabling a transition to predictive digital flatness models that improve the efficiency of rolling process control and subsequent technological operations.</p>

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Influence of Combined Control of CVC Systems and Hydro-Bending of Rolls on the Accuracy of Geometry of Cold Rolled Strips

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • I. A. Kharlamov,
  • N. L. Bolobanova

摘要

Abstract

The mechanism of combined control of the profile and flatness of cold-rolled strips using CVC (Continuously Variable Crown) and WRB (Work Roll Bending) systems has been investigated. It was established that the combination of these systems provides formation of various types of strip profile through controlled deformation across the width. An example of joint regulation by the CVC and WRB systems during rolling of strip on an industrial four-stand 2100 mill is presented, with control of the distribution of elongation (strain) across the width. It is shown that, based on measurements from the flatness-measuring rollers in the first stand, the CVC and WRB systems can operate jointly to equalize elongation across the width; in the intermediate stands—to stabilize stresses; and in the last stand of the mill—to finalize flatness formation. The obtained results provide a basis for the development of empirical research methods and mathematical descriptions of cold-rolled strip flatness, enabling a transition to predictive digital flatness models that improve the efficiency of rolling process control and subsequent technological operations.