• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (12): 83-90.doi: 10.3901/JME.2019.12.083

• 材料科学与工程 • 上一篇    下一篇

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六辊轧机工作辊辊形边降调控能力分析

冯夏维, 王晓晨, 杨荃, 孙蓟泉   

  1. 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
  • 收稿日期:2018-09-28 修回日期:2018-12-06 出版日期:2019-06-20 发布日期:2019-06-20
  • 通讯作者: 王晓晨(通信作者),男,1982年出生,博士,副研究员。主要研究方向为冷热轧板带质量控制。E-mail:wangxiaochen@ustb.edu.cn
  • 作者简介:冯夏维,男,1988年出生,博士研究生。主要研究方向为板带轧制。E-mail:fengxiawei@qq.com;杨荃,男,1964年出生,博士,博士研究生导师。主要研究方向为板带轧机质量控制系统。E-mail:yangquan@nercar.ustb.edu.cn;孙蓟泉,男,1959年出生,博士,教授,博士研究生导师。主要研究方向为材料加工与控制工程。E-mail:sunjq@ustb.edu.cn
  • 基金资助:
    北京市自然科学基金(3182026)、国家自然科学基金(51604024)和中央高校基本科研业务费专项资金(FRF-TP-17-002A2)资助项目

Analysis of Edge Drop Control Performance of Work Roll Contour on Six-high Cold Rolling Mill

FENG Xiawei, WANG Xiaochen, YANG Quan, SUN Jiquan   

  1. National Engineering Research Center for Advanced Rolling, University of Science and Technology Beijing, Beijing 100083
  • Received:2018-09-28 Revised:2018-12-06 Online:2019-06-20 Published:2019-06-20

摘要: 使用带有辊形的工作辊是六辊轧机减小带刚边降的有效手段之一,然而目前对于辊形设计规律的研究仍显不足。首先在分析各种轧机辊系弹性变形计算算法优缺点的基础上,提出分割矩阵求解方法:针对六辊轧机建立影响函数线性方程组,将方程组系数矩阵分割后,把矩阵条件数最小的系数矩阵作为最终迭代环节,同有限元法对比显示其精度合格、速度更快,适用于承担大规模辊系弹性变形预设定分析时的高强度计算任务。其次利用分割矩阵影响函数法,针对工作辊辊形曲线段高度、锥度段斜率对边降调控能力的影响进行研究。结果表明,工作辊辊形高度越大,边降调控能力越强,同凸度控制耦合作用越强;斜线段斜率对边降调控能力影响不大,斜率越小,越有利于同平坦度控制解耦。最后根据以上规律,为工业现场设计了新式辊形曲线,进一步提高5 μm边降合格率。研究结果表明,通过分割矩阵迭代法,辊系弹性变形计算更为精确,同时大的曲线段高度与小的直线段斜率是提高工作辊辊形边降控制能力的有效方案。

关键词: UCMW轧机, 板带轧制, 弹性变形, 辊形设计, 影响函数法

Abstract: Tapered work roll is an effective measure of six-high roll mill to reduce edge drop but its design criterion is not adequately investigated. Firstly, Based on analysis of previous roll stack's elastic deformation theories, the influence function method based on the partitioned matrix iteration scheme is proposed:Influence Function matrix solution for the six-high roll stack is founded, and by partitioning the matrix solution, the coefficient matrix with the smallest condition number is proposed as the outermost iteration. By this iteration scheme, the results are in better agreement with Finite Element Method, which makes it an optimal tool for intensive presetting analysis. Secondly, the proposed method is used to analyze the differences in control properties between different curve heights and tapered slopes of work roll contour. Results show that a higher curve height is beneficial for the edge drop control ability, but strongly coupled with crown control. The tapered slope has limited influence on the edge drop control effect, but a smaller slope is beneficial to decouple edge drop control and crown control. Finally, based on these laws, a new contour is designed and utilized into industrial line, and percentage of edge drop smaller than 5 μm is further improved. The results show that through partitioned matrix iteration scheme, elastic deformation of rolls stack can be accurately calculated. The results also suggest that a large curve height and a small tangent slope is effective to improve the edge drop control performance of work roll contour.

Key words: elastic deformation, flat sheet rolling, influence function method, roll contours, UCMW cold mill

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