六辊冷连轧机电工钢矩形断面控制弯辊力模型

Model of rectangular section control roll bending force for electrical steel in six-high tandem cold mill

为满足新一代高技术冷连轧机宽幅电工钢薄板等高端板材“Dead flat”矩形断面超平材超高板形质量要求,采用显式动力学有限元法建立六辊冷连轧机一体化仿真模型,利用现场工业轧制试验数据验证有限元模型的准确性,定量分析电工钢完整轧制过程中不同轧制因素对有载辊缝凸度的影响规律;基于6辊UCM冷轧机板形控制机理和课题组自主设计的EDW-N(Edge Drop Control Work Rolls for Non-shifting of the Work Rolls)工作辊非窜辊辊形建立六辊冷连轧机电工钢矩形断面控制的弯辊力数学模型;由有限元仿真与现场工业轧制试验结果确定了六辊冷连轧机电工钢矩形断面控制弯辊力数学模型的参数,并验证了其准确性;某大型1420 mm六辊冷连轧机生产应用现场连续检测反馈数据表明:取得电工钢高精度出口凸度均值C15≤7μm的比例从38.58%提高到67.74%的显著生产实绩,充分发挥了六辊冷连轧机的高精度板形控制能力,可在很大调节范围内对板形质量进行调控,为解决无工作窜辊的6辊UCM冷连轧机宽幅电工钢薄板矩形断面控制瓶颈难题提供了解决方案和实现路径。

To meet the quality requirements of"Dead Flat"rectangular section super flat material such as wide electrical steel sheet in the new generation of high-tech tandem cold rolling mill,an integrated simulation model of 6-high tandem cold rolling mill was established by explicit dynamic finite element method.The accuracy of the finite element model was verified by field industrial rolling test data.The influence of different rolling factors on the crown of load roll gap in complete rolling process of electrical steel is analyzed quantitatively.Based on the shape control mechanism of 6-high UCM cold rolling mill and EDW-N(Edge Drop Control Work Rolls for Non-shifting of the Work Rolls)work rolls independently designed by our research group,the bending force mathematical model of rectangular section control of electrical steel in 6-high tandem cold rolling mill was established.The parameters of the bending force mathematical model were determined by finite element simulation and field industrial rolling test data,and its accuracy was verified.The continuous test feedback data of a large 1420 mm six-high tandem cold mill show that the high precision average C15≤7μm ratio of electrical steel has been increased from 38.58%to 67.74%,which gives full play to the high precision shape control ability of the 6-high tandem cold rolling mill and can control the shape quality in a wide range.It provides innovative solutions and implementation paths for solving the bottleneck problem of rectangular section control of 6-high UCM cold rolling mill for non-shifting of the work rolls.