冷轧无取向硅钢横向厚差控制  

Transverse Thickness Deviation Control of Non-oriented Silicon Steel during Cold Rolling

作　　者：何安瑞[1] 邵健[1] 孙文权[1] 管长林[2] 沈新玉[2] 张建平[3] 

机构地区：[1]北京科技大学高效轧制国家工程研究中心,北京100083 [2]马鞍山钢铁股份有限公司一钢轧,马鞍山243011 [3]马鞍山钢铁股份有限公司技术中心,马鞍山243011

出　　处：《机械工程学报》2011年第10期25-30,共6页Journal of Mechanical Engineering

基　　金：国家高技术研究发展计划资助项目(863计划;2009AA04Z163)

摘　　要：冷轧中中低牌号的无取向硅钢多采用万能凸度轧机(Universal crown mill,UCM)生产,其板形好坏受制于UCM轧机板形调节手段的协调使用。为掌握UCM轧机的板形控制特点,建立基于二维变厚度有限元的辊系弹性变形和基于三维差分的轧件塑性变形的六辊轧机耦合模型,对UCM轧机的板形调控性能进行详尽的分析,包括工作辊和中间辊弯辊、中间辊窜辊的调控功效、辊间接触压力分布等。在此基础上,提出可用指导生产的板形控制策略,指出UCM轧机在横向厚差控制方面的不足。针对工业生产中UCM轧机轧制无取向硅钢横向厚差大的问题,在大量仿真计算的基础上,开发具有高次曲线函数的边部变凸度(Edge variable crown,EVC)的工作辊。采用该工作辊后,各种品种的无取向硅钢的横向厚差不大于10μm的百分比由24%提高到99%,横向厚差的均值小于6μm,远小于之前的13μm。Medium-low grade non-oriented silicon steel is rolled often by universal crown mill（UCM） during cold rolling.Its shape quality is dependent on the coordinated control of several shape adjustment devices of UCM.In order to understand the shape control characteristics of UCM,coupling model of six-high rolling mill,based on two-dimensional varying thickness finite element rolls elastic deformation model and three-dimensional finite difference strip plastic deformation model,is setup for the detailed analysis of shape control performances of UCM,including the shape regulation and control efficacy of work roll bending,intermediate roll bending and its shifting,contact force distribution between rolls,et al.On the basis of these,shape control tactics of UCM is put forward for instructing the production,and also its deficiency in the control of transverse thickness deviation is pointed out.In view of the large transverse thickness deviation of non-oriented silicon steel rolled by UCM in industrial production,edge variable crown（EVC） work roll with high order curve function is developed after large amount of simulating calculation.By using this work roll,the percentage of transverse thickness deviation of all varieties of non-oriented silicon steel not greater than 10 μm rises from 24% to 99% after the application of EVC work roll.The average of transverse thickness deviation is less than 6 μm,far less than the previous 13 ？m before the use of EVC.

关 键 词：冷轧 无取向硅钢 板形控制 辊形 

分 类 号：TG333.1[金属学及工艺—金属压力加工] TF3[冶金工程—冶金机械及自动化]