Research on roll temperature field and hot roll crown of hot continuous rolling mills
LI Zizheng1, LIU Luxuan1, YIN Baoliang1, KUANG Shuang2, WANG Jianhui1, BAI Zhenhua1
1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, Hebei, China; 2. Tangshan Iron and Steel Group, Tangshan 063000, Hebei, China
Abstract：Aiming at the problems of roll consumption and shape caused by the inability to accurately predict the roll temperature field of a hot continuous mill. In order to realize the accurate measurement of the temperature field of the roll and the shape of the hot roll, reduce the abnormal consumption of the roll and avoid the occurrence of major production accidents, a numerical finite difference method and roll heat conduction equation were used to establish a model suitable for the roll temperature field and hot roll profile of a hot rolling mill. Based on this model, the roll cooling water intelligent segmental cooling control system of the hot rolling mill is introduced above, fully considering the existence of the specific parameters of the cooling water in the complex state of the cooling water and the direct influence of the cooling water flow rate on the roll temperature field and the hot roll crown. Considering the equipment parameters and process characteristics in the rolling process of hot tandem rolling, and considering the cyclic superposition effect of the increasing number of rolled steel coils on the roll temperature field and hot roll profile, the program is written to combine the theoretical calculation formula, simulation control model and field practice. The combination of process equipment parameters is the research object of analysis. Firstly, the on-site roll temperature measurement equipment is used to measure the temperature of the work roll and the backup roll, and the measured actual temperature distribution value is compared with the calculated value of the model, and the similar roll temperature and roll crown change trend as well as the consistent temperature and crown are obtained. The degree value verifies the accuracy and validity of the model calculation. Subsequently, the influence of changes in the number of steel coils on the roll temperature and roll crown was obtained by means of research and analysis based on the results, found the superimposed effect of the increase in the number of steel coils on the temperature rise, and found that about 10 coils will complete the temperature rise of the roll temperature field, and at the same time analyzed the cooling water roll temperature distribution along the roll body direction at three different flow rates. Finally, the accurate prediction of the temperature field of the work roll and the backup roll and the shape of the hot roll is obtained, and it lays a model foundation for further regulating roll temperature distribution by using roll temperature field and hot roll model.
李子正, 刘芦轩, 尹宝良, 邝霜, 王俭辉, 白振华. 热连轧机组轧辊温度场及热辊型[J]. 钢铁, 2024, 59(2): 111-118.
LI Zizheng, LIU Luxuan, YIN Baoliang, KUANG Shuang, WANG Jianhui, BAI Zhenhua. Research on roll temperature field and hot roll crown of hot continuous rolling mills[J]. Iron and Steel, 2024, 59(2): 111-118.
[1] 李学通,张燕东,尹宝良,等.七机架热连轧机组轧制温度综合优化技术[J].钢铁,2023,58(3):104.(LI X T,ZHANG Y D,YI B L,et al. Comprehensive optimization technology of rolling temperature for seven stand hot strip mill[J]. Iron and Steel,2023,58(3):104.) [2] 郭忠峰,徐建忠,李长生,等.1 700热连轧机轧辊温度场及热凸度研究[J].东北大学学报(自然科学版),2008(4):517.(GUO Z F,XU J Z,LI C S,et al. Temperature field and thermal crown of work rolls on 1 700 hot strip mill[J]. Journal of Northeastern University (Natural Science),2008(4):517.) [3] 李伯群,范璇,李伟红,等.板形设定模型参数优化与控制技术应用[J].钢铁,2019,54(2):41.(LI B Q,FAN X,LI W H,et al. Parameter optimization of shape setting model and application of control technology[J]. Iron and Steel,2019,54(2):41.) [4] ATACK P A, ROBINSON I S. Control of thermal camber by spray cooling when hot rolling aluminum[J].Ironmaking and Steelmaking,1996,23(1):69. [5] SERAJZADEH S, MUCCIARDI F. Modeling the work-roll temperature variation at unsteady condition[J].Modeling and Simulation in Materials Science and Engineering,2003,11(2):179. [6] SONBOLI A, SERAJZADEH S.A model for evaluating thermal mechanical stresses within work-rolls in hot-strip rolling[J].Journal of Engineering Mathematics,2012,72(1):73. [7] 陈宝官,陈先霖,TIEU A K. 用有限元法预测板带轧机工作辊热变形[J].钢铁,1991,36(8):40.(CHEN B G,CHEN X L,TIEU A K. Prediction of work roll thermal deformarion with finite element method on hot strip mill[J]. Iron and Steel,1991,36(8):40.) [8] 汪娟,曹燕,郝振宇,等.热轧工作辊温度场有限元分析[J].热加工工艺,2013,42(3):102.(WANG J,CAO Y,HAO Z Y,et al. Finite element analysis on tehperature field of work roll in hot rolling strip mill[J]. Hot Working Technology,2013,42(3):102.) [9] 渠福泉, 李旭, 张宇峰,等. 冷轧工作辊热凸度及其对板形影响[J]. 中国冶金, 2022, 32(4): 84.(QU F Q, LI X, ZHANG Y F,et al. Thermal crown of cold rolling work roll and its effect on strip shape[J]. China Metallurgy, 2022, 32(4): 84.) [10] 王新宇, 邱春林. 腹板换热系数对H型钢冷却后变形的影响[J]. 轧钢, 2023, 40(1): 65.(WANG X Y, QIU C L. Effect of heat transfer coefficient of web on deformation of H-beam after cooling[J]. Steel Rolling, 2023, 40(1): 65.) [11] 王文广, 徐芳, 李兴波, 等. 热连轧精轧高速钢轧辊重复上机初始辊形预报[J]. 中国冶金, 2022, 32(11): 115.(WANG W G, XU F, LI X B,et al. Initial roll shape prediction for repeat-serviced high-speed steel rolls of hot rolling finishing mill[J]. China Metallurgy, 2022, 32(11): 115.) [12] 李兴东,刘献东,杨利坡,等.热连轧机轧辊热辊型及冷却制度研究[J].冶金设备,2005(5):1. (LI X D, LIU X D, YANG L B, et al. Research on the hot ro11 shape and the cooling system of the hot mill[J].Metallurgical Equipment, 2005(5):1.) [13] 史静,孔祥伟,王国栋,等.工作辊横移对工作辊温度场及热凸度的影响[J].轧钢,2002(4):7.(SHI J,KONG X W,WANG G D,et al. Effects of work roll shifting on its temperature field and thermal crown[J]. Steel Rolling, 2002(4):7.) [14] 郭文涛,何安瑞,杨荃.基于二维交替方向差分法热轧工作辊热辊形模型的研究[J].冶金设备,2009(1):20. (GUO W T, HE A R, YANG Q. Research on work roll thermal coutour model in hot strip mill based on the turning direction two dimensional difference method[J]. Metallurgical Equipment, 2009(1):20.) [15] 尚飞, 李申光, 李艳琳. 辊形配置对辊间接触压力与板形调控影响分析[J]. 中国冶金, 2022, 32(8): 124.(SHANG F, LI S G, LI Y L. Influence analysis of roll configuration on contact pressure and flatness control[J]. China Metallurgy, 2022, 32(8): 124.) [16] 李兴东,孙大乐,杨利坡,等.面向辊形磨削的热带钢连轧机工作辊热变形研究[J].钢铁,2007,42(4):38.(LI X D,SUN D L,YANG L P,et al. Shape grinding oriented thermal deformation research of work roll of hot strip rolling mill[J]. Iron and Steel, 2007,42(4):38.) [17] 王国栋.板形控制和板形理论[M].北京:冶金工业出版社,1980.(WUANG G D. Plate Shape Control and Plate Shape Theory[M].Beijing: Metallurgical Industry Press,1980.) [18] 郝龙,杜晓钟,张钊凯,等.板带热轧工作辊热凸度模拟软件的研究[J].轧钢,2015,32(1):62.(HAO L,DU X Z,ZHANG Z K,et al. Research on simulation software of work roll thermal crown in hot mill[J]. Steel Rolling, 2015,32(1):62.) [19] 李俊洪,连家创,岳晓丽.热带钢连轧机工作辊温度场和热凸度预报模型[J].钢铁研究学报,2003,15(6):25. (LI J H, LIAN J C, YUE X L. Prediction model of temperature field and crown of work roll for hot strip mill[J].Journal of Iron and Steel Research,2003,15(6):25.) [20] 孙一康.带钢热连轧的模型与控制[M].北京:冶金工业出版社,2007.(SUN Y K. Model and Control of Hot Strip Rolling [M]. Beijing: Metallurgical Industry Press,2007.) [21] 李俊洪,李卫平.热带钢连轧机工作辊冷却水优化设计[J].钢铁研究学报,2008,20(12):22.(LI J H,LI W P. Optimization design of cooling water of hot strip mill's work roll[J]. Journal of Iron and Steel Research, 2008,20(12):22.) [22] 许志强,杜凤山,方园.铸轧辊热辊型的研究[J].钢铁研究学报,2006,18(6):26.(XU ZH Q,DU F S,FANG Y. 3-D FEM simulation of hot roll shape during twin-roll strip casting process[J]. Journal of Iron and Steel Research, 2006,18(6):26.) [23] 赵志恒,张云祥,骆艳萍,等.高速线材穿水冷却过程的传热分析及数值模拟[J].上海金属,2023,45(1):86. (ZHAO Z H,ZHANG Y X,LUO Y P,et al. Heat transfer analysis and numerical simulation on water:Through cooling process of high speed wire[J]. Shanghai Metals, 2023,45(1):86.) [24] 曹晓恩, 赵红旗, 李守华, 等. 980 MPa级冷轧超高强度双相钢边裂原因分析与工艺优化[J]. 中国冶金, 2022, 32(9): 90.(CAO X E, ZHAO H Q, LI S H,et al. Cause analysis and process optimization of edge crack for 980 MPa cold rolled ultra high strength dual-phase steel[J]. China Metallurgy, 2022, 32(9): 90.) [25] BEESTON J W, EDWARDS W J. Thermal camber analysis in cold rolling[J].Iron and Steel Institute,1973,(5):320. [26] 徐胜杰.基于云模型的轧辊分段冷却控制方法的研究[D].秦皇岛:燕山大学,2014.(XU S J. Study on the Stepped Cooling Control System of the Rolls Based on Cloud Model[D]. Qinhuangdao:Yanshan University,2014.) [27] 王振鹏.轧辊分段冷却局部换热特性研究[D]. 秦皇岛:燕山大学,2017.(WANG Z P. Research on the Local Heat Transfer Based on the Stepped Cooling of the Rolls[D]. Qinhuangdao:Yanshan University,2017.) [28] 高山凤,郗安民,刘鸿飞,等.热轧工作辊冷却效果的分析与改善[J].钢铁,2016,51(2):97.(GAO S F,XI A M,LIU H F,et al. Analysis and improvement on work roll cooling effect during hot rolling[J]. Iron and Steel, 2016,51(2):97.) [29] 乔俊飞,郭戈,柴天佑,等.轧辊局部冷却控制系统的建模[J].钢铁研究学报,1998,10(3):29.(QIAO J F,GUO G,CHAI T Y,et al. Modelling for partial cooling control system of rolls[J]. Journal of Iron and Steel Research, 1998,10(3):29.) [30] 鲁惠民,陈运远.机械工程材料性能数据手册[M].北京:机械工业出版社,1994. (LU H M, CHEN Y Y. Mechanical Engineering Material Properties Data Sheet[M]. Beijing: China Machine Press,1994.)
2024, Vol. 59 
