工作辊横移对带钢边部减薄的影响

边部减薄是带钢重要的断面质量指标,现代轧机中,轧辊的横移装置对边部减薄的控制起到了重要的作用.以六辊单机架冷轧机为研究对象,采用影响函数法建立轧辊的弹性变形解析模型,分析了工作辊横移对轧后带材边部减薄的影响规律,并通过迭代计算,根据板带比例凸度小于1%的收敛条件,确定了生产某一规格的产品最佳工作辊的横移位置.研究结果表明,工作辊横移会大大改善边部减薄,具体的横移量要根据带材材质、带材宽度以及生产轧制过程参数来确定.同时,该迭代方法适用于轧制过程中工作辊横移位置的预设定计算.

Effect of Work Roll Shift on Strip's Edge Drop

Edge drop is an important quality evaluating index for cross-section,which closely relates to side trimming and the rate of finished products.The control system of roll shift plays an important role in controlling the strip's edge drop on modern mills.Based on the influence function,an analytic model is developed for the elastic deformation of rolls so as to simulate the strip rolling process on 6-high single cold mill with the intention to investigate the effect of work roll shift on strip's edge drop.To determine the optimum work roll shift for a strip product with certain specifications,an iterative computation was done,to which the convergence criterion of proportional crown is less than 1%.The results showed that a proper work roll shift can improve greatly edge drop.The shift value should be determined according to different steel grades,strip widths and relevant rolling parameters,meanwhile,the iterative computation is also available to the preset value of work roll shift.