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工程科学学报,第38卷,第5期:726-733,2016年5月 Chinese Journal of Engineering,Vol.38,No.5:726-733,May 2016 D0l:10.13374/j.issn2095-9389.2016.05.019:http://journals.ustb.edu.cn 带钢热连轧非对称因素对板形的影响 柴箫君”,张杰区,李洪波”,周一中),马珩皞》,张鹏武》 1)北京科技大学机械工程学院,北京1000832)武汉钢铁股份有限公司,武汉430083 ☒通信作者,E-mail:zhangie(@uslb.eu.cm 摘要为研究某2250mm热连轧生产中非对称因素对轧件非对称板形(如楔形和单边浪)的影响,利用基于影响函数法的 辊系变形模型、张应力模型和简化的轧制压力横向分布模型相结合的方法,建立了集轧机和轧件为一体的非对称板形计算模 型.研究结果表明:来料楔形对轧件楔形的影响明显超过其对轧件平坦度的影响:上游机架和下游机架刚度非对称分别主要 影响轧件楔形和平坦度:40℃以内的轧件温度不对称分布对轧件平坦度影响较小,对出口楔形的影响可以忽略:轧件跑偏对 楔形和平坦度均有显著影响.根据板形良好条件确定了各非对称参数的允许范围 关键词热连轧:非对称:板形:影响因素 分类号TG335.5 Influence of asymmetric factors in hot tandem rolling on the shape of steel strips CHAl Xiao-jun'”,ZHANG Jie)a,I Hong-bo”,ZHO0Yi-hong》,MA Heng-hao,ZHANG Peng+u2》 1)School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Wuhan Iron and Steel Co.Ltd.,Wuhan 430083,China Corresponding author,E-mail:zhangjie@ustb.edu.cn ABSTRACT In order to analyze the influence of asymmetric factors on the shape (such as wedge and single edge wave)of rolled pieces in 2250 mm hot tandem rolling,an asymmetric shape calculation model involving rolls and rolled pieces was established,which is integrated by a roll deformation calculation model based on the influence function method,a transverse distribution model of tension stress and a simplified transversal distribution model of rolling force.The results show that the wedge of incoming pieces has a greater effect on the wedge of rolled pieces than on the flatness.The stiffness asymmetry of up-stream stands and down-stream stands mainly affect the wedge and flatness of rolled pieces,respectively.A temperature difference of rolled pieces within 40C has a little effect on the flatness and has negligible effect on the wedge.The deviation of rolled pieces affects both the wedge and flatness dramatically.The admissible ranges of asymmetric factors were determined with a target of achieving a good strip shape KEY WORDS hot tandem rolling:asymmetry:plate shape:influencing factors 板形是衡量板带产品质量的重要指标之一.随着 中产品的运行状态、板廓和平坦度产生显著影响田 板带工业的发展,热轧产品对称板形如凸度、双边浪和 国内外许多学者针对轧件非对称板形问题进行了 中浪的控制能力已得到大幅提高网,但其非对称板 研究:Shiraishi等通过实验确定不同轧制过程中带 形如楔形和单边浪的控制尚不能达到同等水平.国内 钢镰刀弯与楔形的关系:Elsila和R6ning利用知识发 某2250mm热连轧机生产中常出现楔形不良和非对称 现的方法分析轧制过程中影响带钢楔形的主要因素: 平坦度缺陷.生产实际及文献均表明,这种非对称板 Kwom等切对带钢初始跑偏与楔形对带钢精轧过程中 形缺陷明显降低成品质量,并对后续冷轧工序生产 横向运动的影响进行仿真研究:Jeong等利用三维有 收稿日期:2015-06-16 基金项目:国家自然科学基金资助项目(51404021):国家“十二五”科技支撑计划资助项目(2015BAF30B01)工程科学学报,第 38 卷,第 5 期: 726--733,2016 年 5 月 Chinese Journal of Engineering,Vol. 38,No. 5: 726--733,May 2016 DOI: 10. 13374 /j. issn2095--9389. 2016. 05. 019; http: / /journals. ustb. edu. cn 带钢热连轧非对称因素对板形的影响 柴箫君1) ,张 杰1) ,李洪波1) ,周一中2) ,马珩皞2) ,张鹏武2) 1) 北京科技大学机械工程学院,北京 100083 2) 武汉钢铁股份有限公司,武汉 430083  通信作者,E-mail: zhangjie@ ustb. edu. cn 摘 要 为研究某 2250 mm 热连轧生产中非对称因素对轧件非对称板形( 如楔形和单边浪) 的影响,利用基于影响函数法的 辊系变形模型、张应力模型和简化的轧制压力横向分布模型相结合的方法,建立了集轧机和轧件为一体的非对称板形计算模 型. 研究结果表明: 来料楔形对轧件楔形的影响明显超过其对轧件平坦度的影响; 上游机架和下游机架刚度非对称分别主要 影响轧件楔形和平坦度; 40 ℃ 以内的轧件温度不对称分布对轧件平坦度影响较小,对出口楔形的影响可以忽略; 轧件跑偏对 楔形和平坦度均有显著影响. 根据板形良好条件确定了各非对称参数的允许范围. 关键词 热连轧; 非对称; 板形; 影响因素 分类号 TG335. 5 Influence of asymmetric factors in hot tandem rolling on the shape of steel strips CHAI Xiao-jun1) ,ZHANG Jie 1)  ,LI Hong-bo 1) ,ZHOU Yi-zhong2) ,MA Heng-hao 2) ,ZHANG Peng-wu2) 1) School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China 2) Wuhan Iron and Steel Co. Ltd. ,Wuhan 430083,China  Corresponding author,E-mail: zhangjie@ ustb. edu. cn ABSTRACT In order to analyze the influence of asymmetric factors on the shape ( such as wedge and single edge wave) of rolled pieces in 2250 mm hot tandem rolling,an asymmetric shape calculation model involving rolls and rolled pieces was established,which is integrated by a roll deformation calculation model based on the influence function method,a transverse distribution model of tension stress and a simplified transversal distribution model of rolling force. The results show that the wedge of incoming pieces has a greater effect on the wedge of rolled pieces than on the flatness. The stiffness asymmetry of up-stream stands and down-stream stands mainly affect the wedge and flatness of rolled pieces,respectively. A temperature difference of rolled pieces within 40 ℃ has a little effect on the flatness and has negligible effect on the wedge. The deviation of rolled pieces affects both the wedge and flatness dramatically. The admissible ranges of asymmetric factors were determined with a target of achieving a good strip shape. KEY WORDS hot tandem rolling; asymmetry; plate shape; influencing factors 收稿日期: 2015--06--16 基金项目: 国家自然科学基金资助项目( 51404021) ; 国家“十二五”科技支撑计划资助项目( 2015BAF30B01) 板形是衡量板带产品质量的重要指标之一. 随着 板带工业的发展,热轧产品对称板形如凸度、双边浪和 中浪的控制能力已得到大幅提高[1--2],但其非对称板 形如楔形和单边浪的控制尚不能达到同等水平. 国内 某 2250 mm 热连轧机生产中常出现楔形不良和非对称 平坦度缺陷. 生产实际及文献均表明,这种非对称板 形缺陷明显降低成品质量[3],并对后续冷轧工序生产 中产品的运行状态、板廓和平坦度产生显著影响[4]. 国内外许多学者针对轧件非对称板形问题进行了 研究: Shiraishi 等[5]通过实验确定不同轧制过程中带 钢镰刀弯与楔形的关系; Elsil 和 Rning [6]利用知识发 现的方法分析轧制过程中影响带钢楔形的主要因素; Kwon 等[7]对带钢初始跑偏与楔形对带钢精轧过程中 横向运动的影响进行仿真研究; Jeong 等[8]利用三维有
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