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轧辊热膨胀对承载辊缝形状和带钢板形具有显著的影响,而准确预报轧制过程中轧辊热膨胀是板形控制中的难点之一。针对某热连轧生产线单辊期内热膨胀量与轧辊温度不收敛的问题,利用自主开发的与产线生产完全一致的板形模型分析测试系统对热凸度二级模型进行了仿真分析与研究,提出了一种有效提高工作辊热平衡收敛性的优化方法,并进行了生产应用。该优化方法的应用解决了该热轧产线单辊期内热平衡不收敛的问题,消除了轧辊温度计算值和实测值之间的偏差,不仅提高了模型的预报精度,也大幅提高了该产线轧制带钢的凸度控制精度。
Roller thermal expansion has a significant influence on the shape of bearing nip and strip shape. Accurately forecasting the thermal expansion of roll during rolling is one of the difficulties in plate shape control. Aiming at the problem that the thermal expansion and the roll temperature do not converge during the single roll of a hot tandem mill, the thermal convexity two-level model is simulated and analyzed by using the independently developed flat-panel model analysis and test system that is identical with the production line , An optimization method to effectively improve the convergence of the heat balance of the work roll is put forward and the production and application are carried out. The application of the optimization method solves the problem that the heat balance does not converge during the single roll period of the hot rolling line and eliminates the deviation between the calculated and measured roll temperature values, which not only improves the prediction accuracy of the model but also greatly improves the production Control of crown of wire rolling strip.