There are severe uneven “cat ear” wear contours of work rolls, the key factors to affect high‐quality profile and flatness control of electrical steel strips, in the schedule‐free rolling process with a large number of the same width strip rolling campaigns of hot rolling mills. The work roll wear prediction model, thermal roll contour model, and a 3D finite‐element model of roll stacks and strip are established using MATLAB and ABAQUS software. The effects of the work roll wear contour on the loaded roll gap profile within the entire rolling campaign are analyzed. A variable stroke and step (VSS) shifting strategy is developed based on the exponentially damped sinusoids function, which can get the smooth work roll wear contours. The main parameters including attenuation coefficient of stroke, the coil number and the attenuation coefficient of the first shifting cycle, and the initial phase avoiding repetition of the shifting position, are obtained by genetic optimization. The industrial application of the VSS shifting strategy gives remarkable results. The “cat ear” height value of local work roll wear contours is decreased by 67.3% and the high‐precision rate of crown from 25 to 40 μm of the electrical steel is increased by 22.5%.

中文翻译：

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无计划轧制中电工钢的轮廓和平直度不均匀的“猫耳”磨损控制工作辊转移策略

工作辊存在严重的不均匀“猫耳”磨损轮廓，这是影响电工钢带高质量轮廓和平直度控制的关键因素，在无计划的轧制过程中，大量相同宽度的带钢轧制活动热轧机。使用MATLAB和ABAQUS软件建立了工作辊磨损预测模型，热轧辊轮廓模型以及轧辊堆垛和带钢的3D有限元模型。分析了整个轧制过程中工作辊磨损轮廓对加载辊隙轮廓的影响。在指数阻尼正弦函数的基础上，提出了可变行程和步进（VSS）换挡策略，该策略可以得到平滑的工作辊磨损轮廓。主要参数包括行程的衰减系数，通过遗传优化获得了第一换挡周期的线圈数和衰减系数，以及避免重复换挡位置的初始相位。VSS移位策略在工业上的应用效果显着。局部工作辊磨损轮廓的“猫耳”高度值降低了67.3％，电工钢从25到40μm的凸度的高精度提高了22.5％。