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针对不锈钢冷连轧生产工艺,提出动态变形抗力概念,利用四辊可逆冷轧机和Inston高速拉伸实验机进行轧制-拉伸实验,在MMS-200热模拟实验机上测定不锈钢的应力-应变曲线,建立不锈钢动态变形抗力模型。在Hill方程的基础上建立了轧制力显函数模型,并通过变形抗力和摩擦因数的逆向回归计算实现模型的在线自学习。提出了适合轧制力模型的可信度评估方法,引入Theil不等式系数法,依据TIC值定性分析了模型的适用性。最终确立了适合于冷连轧生产的精确的轧制力显函数模型,并将其应用到生产实践中。统计结果表明:冷连轧过程中轧制力的模型计算值与实测值的相对误差小于3.67%,该模型具有良好的计算精度和较好的泛化能力,适合于工业生产实践。
Aiming at the production process of stainless steel cold tandem rolling, the concept of dynamic deformation resistance was put forward. The rolling-stretching experiment was carried out by four-roller reversing cold rolling mill and Inston high-speed tensile testing machine. The stress-strain of stainless steel was measured on MMS-200 thermal simulation machine Curve, the establishment of stainless steel dynamic deformation resistance model. On the basis of the Hill equation, a force function model of rolling force is established, and the online self-learning of the model is realized by means of regression regression of deformation resistance and friction coefficient. The method to evaluate the credibility of rolling force model is proposed. The Theil inequality coefficient method is introduced, and the applicability of the model is qualitatively analyzed based on the TIC value. Finally, an explicit explicit function model of rolling force suitable for cold tandem rolling production is established and applied to production practice. The statistical results show that the relative error between the calculated and measured values of the rolling force during cold tandem rolling is less than 3.67%. The model has good calculation accuracy and good generalization ability and is suitable for industrial production practice.