六辊CVC冷轧机凸度控制能力分析及应用

Analysis and Appliaction of Crown Control of 6-high CVC Cold Rolling Mill

基于三维有限元建立了六辊CVC辊系模型,该模型耦合了CVC辊形曲线、辊间轧制力分布以及带钢的弹塑性变形和辊系弹性变形,通过迭代计算辊间轧制力及轧辊与轧件的弹塑性变形。通过实际轧制规程数据对比验证了模型的有效性,其模拟计算结果与实际数据的绝对误差在10μm内,相对误差小于1%。采用该模型研究了板形控制机构如中间辊弯辊、中间辊窜辊和工作辊弯辊对带钢2次凸度和4次凸度的控制规律,并成功消除了生产现场宽薄带钢的边中复合浪缺陷。

By means of 3D Finite Element Method （FEM）, a new 6-high CVC cold rolling mill model, which couples CVC profile, rolling force distribution between rolls, elastic deformation of rollers, and elastic-plastic deformation of strip, was built. The rolling force distribution between rolls and elastic-plastic deformation of roll and workpiece were obtained by the iteration calculation method. The model was verified in comparison with the actual rolling schedule data. The abso-lute error between the simulated results and the actual values is obtained to be less than 10μm, and relative error is less than 1%. Thus, the simulated results are in good agreement with the measured data. Consequently, the effect of flatness ac-tuators such as intermediate roll bending, intermediate roll shifting and work roll bending on secondary crown and quartic crown was studied and actual center-edge buckles of the industrial products of wide and thin strips in the cold rolling pro-cess were successfully eliminated according to the research results.