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六輥冷軋機的彎輥力組合板形控制策略

Shape control strategy by bending force combination adjustment for 6-hi cold rolling mill

  • 摘要: 針對現有六輥軋機對使用兩組彎輥力進行四次板形控制的理論不足,提出了彎輥力組合板形控制策略.利用Marc有限元仿真計算軟件建立輥系-軋件耦合模型,分析工作輥彎輥力與中間輥彎輥力板形調控特性的差別.在此基礎上通過理論推導,建立了彎輥力組合板形控制策略的兩種實現方式——在線閉環控制模型與基于彎輥力組合系數的設定參數在線調節方法.現場應用結果表明,彎輥力組合板形控制策略能夠充分利用工作輥彎輥力與中間輥彎輥力板形調控特性的差別進行配合調節,對長期困擾生產的四次板形缺陷實施快速精確的控制.

     

    Abstract: A shape control strategy by bending force combination adjustment for 6-hi cold rolling mills was proposed to solve the theoretical insufficiency of 4-order shape defect control by two kinds of bending forces. A roll-strip coupling model was established with Marc finite element simulation software, and the difference of shape control characters was analyzed between work roll bending force and intermediate roll bending force. Two methods for implementing the shape control strategy, which are the on-line closed-loop control model and the on-line setting parameter adjustment method based on bending force combination coefficients, were introduced by theoretical derivation. It is proved by field application that with the shape control strategy, the difference of shape control characters between work roll bending force and intermediate roll bending force is fully utilized and the combination adjustment is realized to precisely control 4-order shape defects, which perplex production for a long time.

     

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