SmartCrown轧机板形执行机构调控功效分析  

Analysis of flatness actuator efficiencies of SmartCrown mill

作　　者：李康 李旭[1] 李晓华 王青龙 韩月娇 LI Kang;LI Xu;LI Xiaohua;WANG Qinglong;HAN Yuejiao(The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,Liaoning,China;Department of Mechanical Engineering,North China Electric Power University,Baoding 071003,Hebei,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819 [2]华北电力大学机械工程系,河北保定071003

出　　处：《钢铁》2023年第9期148-156,177,共10页Iron and Steel

基　　金：国家自然科学基金资助项目(U20A20187);辽宁省“兴辽英才计划”资助项目(XLYC2007087)。

摘　　要：冷轧带钢因其优良特性而广受欢迎,其中,板形是衡量冷轧带钢产品质量的重要指标。SmartCrown技术作为一种新兴的板形控制技术,有着良好的板形控制效果,研究分析SmartCrown轧机中板形执行机构的板形调控功效对于调节带钢板形、提高带钢产品质量具有重要意义。以某厂1740 mm带钢冷连轧生产线为研究对象,运用大型有限元分析软件ANSYS/LS-DYNA建立SmartCrown轧机带钢轧制的有限元仿真模型,对中间辊横移、工作辊弯辊、中间辊弯辊等板形执行机构的调节量在工程许用范围内进行等分设定,利用有限元平台进行模拟带钢轧制试验并对其进行后处理分析,系统地分析了各板形执行机构对带钢横截面形状、板凸度、边部减薄、轧后带钢横截面的相对厚度差以及纵向纤维条的相对长度差等的影响规律,在此基础上,进一步计算获得了各板形执行机构的调控功效系数曲线,并采用六次Legendre正交多项式对调控功效系数曲线进行拟合,获得了各项拟合系数的绝对值,将各板形执行机构的板形控制分量进行对比以定量分析各板形执行机构的板形控制特性。仿真结果表明,中间辊横移的板形控制能力是最强的,工作辊弯辊次之,中间辊弯辊最弱,3种板形执行机构对二次板形缺陷的控制能力明显强于四次和六次板形缺陷,研究成果能够为现场冷轧带钢生产提供参考。Cold-rolled strip is popular because of its excellent characteristics,among which the flatness is an important index to measure the quality of cold rolled strip products.As an emerging flatness control technology,SmartCrown technology has a good flatness control effect.It is of great significance to study and analyze the flatness control effect of the flatness actuators of SmartCrown mill for adjusting strip flatness and improving the quality of strip products.The 1740 mm strip cold rolling production line of a factory is taken as the research object.The finite element simulation model of SmartCrown mill is established by using the large finite element analysis software ANSYS/LS-DYNA,and the adjustment amount of flatness actuators such as intermediate roll shifting,work roll bending and intermediate roll bending is set in equal parts within the allowable range of the project.The finite element platform is used to simulate strip rolling experiment and the post-processing analysis is carried out.The influence of flatness actuators on the thickness profile of strip,the crown and edge drop of strip,relative thickness difference of the strip thickness profile and relative length difference of the strip longitudinal fibers were systematically analyzed.On this basis,curves of flatness actuator efficiency factors are obtained by calculation and fitted by six Legendre orthogonal polynomials to obtain the absolute values of fitting coefficients.The flatness control components of flatness actuators are compared to quantitatively analyze the flatness control characteristics of the flatness actuators.The results show that the flatness control ability of intermediate roll shifting is the strongest,followed by working roll bending,and intermediate roll bending is the weakest.The control ability of the three flatness actuators to the secondary flatness defects is stronger than that of the fourth and sixth flatness defects,which can provide reference for the production of cold rolled strip.

关 键 词：冷轧带钢 板形 SmartCrown 中间辊 有限元分析 板形执行机构 

分 类 号：TG333[金属学及工艺—金属压力加工]