冷轧无取向硅钢同板差控制的EVC-Plus技术

EVC-Plus technique of transverse thickness deviation control of non-oriented silicon steel during cold rolling

同板厚度差是无取向硅钢非常关键的质量指标。以某厂冷连轧机组UCM轧机为研究对象,建立辊系轧件一体化仿真计算模型。运用此模型,兼顾冷连轧机轧制稳定性、无取向硅钢的同板差控制,优化设计了特殊双圆弧倒角的EVC-Plus（Edge Variable Crown-Plus）工作辊辊形曲线,并将其应用于某1 720UCM冷连轧机组。实际应用结果表明该辊形易磨削。针对不同产品宽度设计,EVC-Plus辊形可使无取向硅钢产品的同板差从12降低到8μm以下,并大幅度降低断带事故的发生,取得了良好的控制效果。

To non-oriented silicon steel,transverse thickness deviation is very important and key quality target. UCM tandem cold rolling mill is taken as the research object,an integrated simulation model of 6-High Mill and thin strip is established. By this model,considering the rolling stability and transverse thickness deviation control of non-oriented silicon steel,the EVC-Plus（Edge Variable Crown-Plus）roll with special double arc chamfering was designed and applied on a 1 720 UCM tandem cold mill. The actual application results showed that the EVC-Plus can be ground easily and the transverse thickness deviation of the non-oriented silicon steel was reduced from 12 to 8 μm or less by corresponding EVC-Plus contour for different product width,and the occurrence of strip breakage accident was greatly reduced.