工程科学学报，第40卷，第8期：954-960.2018年8月 Chinese Journal of Engineering,Vol.40,No.8:954-960,August 2018 DOI:10.13374/j.issn2095-9389.2018.08.009;http://journals.ustb.edu.cn 轧辊交叉对中间坯镰刀弯生成过程的影响 徐冬，代振洋，刘洋四，杨荃，王晓晨，孙友昭，刘克东 北京科技大学国家板带生产先进装备工程技术研究中心，北京100083 ☒通信作者，E-mail:usth_liuyang(@163.com 摘要粗轧过程中出现的轧辊两侧轴承间隙差异较大的情况，会造成轧辊交叉，导致板带两侧轧制力失衡，进而引起或加 剧中间坯的镰刀弯缺陷，影响最终产品质量精度和后续精轧的轧制稳定性.为研究轧辊交叉对中间坯镰刀弯生成过程的影 响，建立了轧辊交叉、偏移的轧件-辊系耦合动态有限元模型，利用模型分析了不同工况条件下，轧辊交叉位置、交叉角度对中 间坯楔形、弯曲量及两侧轧制力差的影响，进而总结了由轴承间隙引起的轧辊非对称交叉对中间坯镰刀弯弯曲量的影响规 律.结果表明：镰刀弯弯曲量与交叉角、交叉位置比分别呈线性关系，与辊系间隙比呈二次曲线关系. 关键词热轧粗轧：镰刀弯：轧辊交叉：有限元：影响分析 分类号TG335.5 Influence of crossed roller on generating camber in hot rough rolling XU Dong,DAI Zhen-yang,LIU Yang,YANG Quan,WANG Xiao-chen,SUN You-zhao,LIU Ke-dong National Engineering Research Center of Flat Rolling Equipment,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:ustb_liuyang@163.com ABSTRACT The shape of a hot rolled strip is a main indicator of its quality,and camber is a significant defect arising from problems in shape quality.Differences in the bearing clearance of the two sides of a rough mill can cause a crossed roller,which leads an imbal- ance in the rolling force and,thereby,camber.A camber defect adversely affects product quality and the stability of the subsequent finish-rolling production process.The simulation and control of asymmetric shapes is one of the hottest topics in the field of modern strip rolling.To solve this problem and enhance the quality and precision of the strips produced,exploring and analyzing the problem of camber in hot rough rolling is necessary.This study investigated the generation of camber in the 1580 mm roughing mill R2 of a steel plant during the hot-continuous-rolling process.This paper established a three-dimensional elastic-plastic dynamic coupling model of the rolls and slab using the finite element(FE)analysis software ABAQUS/Explicit.In addition,the paper used a data analysis meth- od based on the node-set coordinate output.By balancing the relationship between computational precision and efficiency,the study found the FE model to run stably.Using the proposed model,the paper systematically investigated the influence of cross position and angle on the camber,slab wedge,and amount of rolling force under different conditions.Based on the FE results,the paper then char- acterized the influence law for the occurrence of a cross roll with respect to bearing clearance and slab camber.Numerical examples demonstrate that the relationship between the camber and cross-angle position is linear,and that between the slab camber and clearance is a quadratic curve. KEY WORDS hot rough rolling;camber;crossed roller;finite element;analysis of influence 热轧镰刀弯缺陷是由于轧制过程中中间坯操作侧和传动侧延伸不同而形成的)]，严重影响最终产 收稿日期：2017-12-01 基金项目：国家自然科学基金资助项目(51604024)：清华大学摩擦学国家重点实验室开放基金资助项目(SKLTKF16B11):中央高校基本科研 业务费专项资金资助项目(FRF-TP-17-002A2):北京市自然科学基金资助项目(3182026)工程科学学报,第 40 卷,第 8 期:954鄄鄄960,2018 年 8 月 Chinese Journal of Engineering, Vol. 40, No. 8: 954鄄鄄960, August 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 08. 009; http: / / journals. ustb. edu. cn 轧辊交叉对中间坯镰刀弯生成过程的影响 徐 冬, 代振洋, 刘 洋苣 , 杨 荃, 王晓晨, 孙友昭, 刘克东 北京科技大学国家板带生产先进装备工程技术研究中心, 北京 100083 苣 通信作者, E鄄mail: ustb_liuyang@ 163. com 摘 要 粗轧过程中出现的轧辊两侧轴承间隙差异较大的情况,会造成轧辊交叉,导致板带两侧轧制力失衡,进而引起或加 剧中间坯的镰刀弯缺陷,影响最终产品质量精度和后续精轧的轧制稳定性. 为研究轧辊交叉对中间坯镰刀弯生成过程的影 响,建立了轧辊交叉、偏移的轧件鄄鄄辊系耦合动态有限元模型,利用模型分析了不同工况条件下,轧辊交叉位置、交叉角度对中 间坯楔形、弯曲量及两侧轧制力差的影响,进而总结了由轴承间隙引起的轧辊非对称交叉对中间坯镰刀弯弯曲量的影响规 律. 结果表明:镰刀弯弯曲量与交叉角、交叉位置比分别呈线性关系,与辊系间隙比呈二次曲线关系. 关键词 热轧粗轧; 镰刀弯; 轧辊交叉; 有限元; 影响分析 分类号 TG335郾 5 收稿日期: 2017鄄鄄12鄄鄄01 基金项目: 国家自然科学基金资助项目(51604024);清华大学摩擦学国家重点实验室开放基金资助项目( SKLTKF16B11);中央高校基本科研 业务费专项资金资助项目(FRF鄄鄄TP鄄鄄17鄄鄄002A2);北京市自然科学基金资助项目(3182026) Influence of crossed roller on generating camber in hot rough rolling XU Dong, DAI Zhen鄄yang, LIU Yang 苣 , YANG Quan, WANG Xiao鄄chen, SUN You鄄zhao, LIU Ke鄄dong National Engineering Research Center of Flat Rolling Equipment, University of Science and Technology Beijing, Beijing 100083, China 苣 Corresponding author, E鄄mail: ustb_liuyang@ 163. com ABSTRACT The shape of a hot rolled strip is a main indicator of its quality, and camber is a significant defect arising from problems in shape quality. Differences in the bearing clearance of the two sides of a rough mill can cause a crossed roller, which leads an imbal鄄 ance in the rolling force and, thereby, camber. A camber defect adversely affects product quality and the stability of the subsequent finish鄄rolling production process. The simulation and control of asymmetric shapes is one of the hottest topics in the field of modern strip rolling. To solve this problem and enhance the quality and precision of the strips produced, exploring and analyzing the problem of camber in hot rough rolling is necessary. This study investigated the generation of camber in the 1580 mm roughing mill R2 of a steel plant during the hot鄄continuous鄄rolling process. This paper established a three鄄dimensional elastic鄄plastic dynamic coupling model of the rolls and slab using the finite element (FE) analysis software ABAQUS / Explicit. In addition, the paper used a data analysis meth鄄 od based on the node鄄set coordinate output. By balancing the relationship between computational precision and efficiency, the study found the FE model to run stably. Using the proposed model, the paper systematically investigated the influence of cross position and angle on the camber, slab wedge, and amount of rolling force under different conditions. Based on the FE results, the paper then char鄄 acterized the influence law for the occurrence of a cross roll with respect to bearing clearance and slab camber. Numerical examples demonstrate that the relationship between the camber and cross鄄angle position is linear, and that between the slab camber and clearance is a quadratic curve. KEY WORDS hot rough rolling; camber; crossed roller; finite element; analysis of influence 热轧镰刀弯缺陷是由于轧制过程中中间坯操作 侧和传动侧延伸不同而形成的[1] ,严重影响最终产