在线高精度热轧铝板带横向厚度计算模型
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摘要
分析了轧件宽度、轧制力、工作辊直径和弯辊力对出口板带厚度分布的影响。将在线横向厚度计算模型看成是有载辊缝和带材出口弹性恢复量的线性组合,利用快速辊系弹性变形的计算方法求得有载辊缝。考虑到在线应用,将大量数据进行分析处理,得到了在线有载辊缝的数学模型。将其与带材出口弹性恢复量的计算模型结合,得到了板带横向厚度计算模型。该模型既考虑了轧制过程中一些不对称工艺参数对轧辊变形的影响,同时也考虑了轧件横向流动对厚度分布的影响。对在线横向厚度计算模型进行了验证。结果表明,在线横向厚度计算模型计算精度高,计算速度快,是在线板形控制的有效方式。
The effects of rolled piece width, rolling force, work roll diameter and bending roll force on the thickness distribution of the outlet strip were analyzed. The on-line transverse thickness calculation model was considered as a linear combination of the loaded roll gap and the elastic recovery of the strip outlet, and the loaded roll gap was obtained by the fast roll system elastic deformation calculation method. Considering the on-line application, a large number of data were analyzed and processed, and the mathematical model of the on-line loaded roll gap was obtained. Combined with the elastic recovery model of the strip outlet, the transverse thickness calculation model of the strip was obtained. The model not only considers the influence of some asymmetrical process parameters on roll deformation, but also considers the influence of transverse flow on thickness distribution. The on-line transverse thickness calculation model was verified. The results show that the on-line lateral thickness calculation model has high accuracy and fast calculation speed, which is an effective method for on-line shape control.
The effects of rolled piece width, rolling force, work roll diameter and bending roll force on the thickness distribution of the outlet strip were analyzed. The on-line transverse thickness calculation model was considered as a linear combination of the loaded roll gap and the elastic recovery of the strip outlet, and the loaded roll gap was obtained by the fast roll system elastic deformation calculation method. Considering the on-line application, a large number of data were analyzed and processed, and the mathematical model of the on-line loaded roll gap was obtained. Combined with the elastic recovery model of the strip outlet, the transverse thickness calculation model of the strip was obtained. The model not only considers the influence of some asymmetrical process parameters on roll deformation, but also considers the influence of transverse flow on thickness distribution. The on-line transverse thickness calculation model was verified. The results show that the on-line lateral thickness calculation model has high accuracy and fast calculation speed, which is an effective method for on-line shape control.
引文
[1]由明扬.冷轧机厚度控制系统设计与实现[D].哈尔滨:哈尔滨工业大学,2016.
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[2]高山凤,刘鸿飞,郗安民,等.热轧板带横向厚度分布的预测与控制[J].哈尔滨工业大学学报,2016(1):180-183.
[3]彭文,姬亚锋,陈树宗,等.热连轧轧制特性分析及轧制力动态锁定策略[J].中南大学学报:自然科学版,2017(6):1492-1498.
[4]Hu X,Wang Z,Zhao Z,et al.Gauge-meter model building based on the effect of elastic deformation of rolls in a plate mill[J].Journal of Mineral Metallurgy and Materials,2007,14(4):381-386.
[5]韩世平.热轧板带横向厚度分布神经网络预测分析[J].山西冶金,2016,39(1):5-6.
[6]龚殿尧,徐建忠,宋向荣,等.热轧中宽带钢凸度控制模型开发与应用[J].东北大学学报:自然科学版,2017,38(4):512-51.
[7]黄长清,谷向磊.铝合金热轧影响因素分析及板形控制技术研究[J].热加工工艺,2017,46(9):10-13.
[8]刘鑫.热轧薄规格宽厚板板型控制研究[J].世界有色金属,2017(3):203-204.
[9]王国栋.板形控制和板形理论[M].北京:冶金工业出版社,1986.
[10]胡锡增.冷轧板材接触弧长度的确定及轧制力计算[J].东北重型机械学院学报,1979(z1):13-33.
[11]刘雪峰,汪凌云.基于影响函数的轧机辊系变形分析及板形预报[J].重庆大学学报:自然科学版,2000,23(6):87-90.
[12]何安瑞,邵健,孙文权.板形控制理论与实践[M].北京:冶金工业出版社,2016.
[13]胡贤磊,赵忠,邱红雷,等.在线高精度中厚板凸度计算模型[J].东北大学学报:自然科学版,2004,25(10):965-968.
[14]孙一康.带钢热连轧的模型与控制[M].北京:冶金工业出版社,2002.
[15]李艳琳.新一代热连轧机电工钢自由规程轧制板形控制[D].北京:北京科技大学,2017.