以某冷轧宽带钢UCMW轧机为研究对象,采用有限元法分析了单锥度工作辊窜辊和单锥度工作辊端部辊形对边降控制的影响. 结果表明:端部辊形采用正弦函数时,随工作辊端部锥段窜入带钢深度的增加,边降呈抛物线关系减小;工作辊窜辊的边降调控能力随端部辊形有效段锥度的增加而增加. 同一窜辊深度下,增大有效段锥度可以减小边降;不改变有效段辊形而减小锥段长度可以减小边降. 此外,减小锥度和增大锥长可减小最大辊间压力和辊间压力不均匀度.
Taking the UCMW mill, a cold rolling mill, for an example, the finite element method (FEM) was employed to estimate the effects of tapered work roll shifting and the change in roll contour of the work roll end on edge drop control. The results show that the edge drop of cold rolled strips decreases with the increase in penetration length of the tapered part into strip edge when the work roll end is defined as a sinusoid curve, and the function of edge drop to work roll shifting is parabolic. The effect of work roll shifting on edge drop control increases with the increase in taper at the work roll end. Edge drop can be alleviated by increasing the taper of the work roll end at the same work roll shifting, whereas it can be also reduced when the roll contour at the work roll end does not change but the taper length decreases. In addition both the unevenness of pressure distribution and the maximum pressure between the work roll and the intermediate roll can be alleviated in terms of decreasing the taper and increasing the taper length.