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  首页《机械工程学报(英文版)》2008年3期目录PROFILE AND FLATNESS CONTROL SYSTEM IN 1 700 mm HOT STRIP MILLS OF ANSTEEL

HE Anrui

YANG Quan

CHEN Xianlin
National Engineering Research Center for Advanced Rolling Technology,
University of Science and Technology Beijing,
Beijing 100083, China

ZHAO Lin
Hot Strip Plant,
Anshan Iron & Steel Group Company,
Anshan 114021, China

 

 

PROFILE AND FLATNESS CONTROL SYSTEM IN 1 700 mm HOT STRIP MILLS OF ANSTEEL*

 

Abstract: Varying contact-length backup roll and linearly variable crown work roll are provided for improving the mill performance of profile and flatness control. Integrated with theses technologies, relevant profile and flatness control models are developed for hot strip mills on the basis of large amount of finite element calculation. These models include shape setup control model in process control system, bending force feedforward control model, crown feedback control model and flatness feedback control model in basis automation system. Such a profile and flatness control system with full functions is applied in 1 700 mm industrial hot strip mills of Ansteel. Large amount of production data shows that the crown precision with the tolerance of 18 m is over 90%, the strip percentage which the actual flatness is within  25 I-unit surpasses 96%, and general roll consume is reduced by 28% by using the profile and flatness control system. In addition, schedule-free rolling is realized.

Key words: Hot strip mills Profile and flatness control Roll contour Schedule-free rolling

 


* This project is supported by National Key Scientific and Technological Project of the Ninth Five-year of China (No. 97-316-01-01). Received May 16, 2007; received in revised form September 10, 2007; accepted April 8, 2008

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Biographical notes

HE Anrui is a professor in National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, China. He received his PhD degree from School of Mechanical Engineering, University of Science and Technology Beijing, China, in 2000. His research mainly focuses on steel rolling automation, mill mechanical analysis, etc. He has published more than 10 theses on related field.
Tel: +86-10-62332598; E-mail: harui@nercar.ustb.edu.cn

YANG Quan is a professor and vice director in National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, China. His research mainly focuses on equipment and processing of strip quality control.
Tel: +86-10-62332598; E-mail: yangquan@nercar.ustb.edu.cn

CHEN Xianlin is an academician of Chinese Academy of Engineering and one of consultants of National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, China. His research mainly focuses on mechanical behavior of plate and strip rolling mill.
Tel: +86-10-62332598; E-mail: xlchen@public.bta.net.cn

ZHAO Lin is currently a senior engineer in Hot Strip Plant, Anshan Iron & Steel Group Company, China. He is mainly responsible for strip quality control.
Tel: +86-412-6753332; E-mail: zhaolinwl@eyou.com


References


[1] GINZBURG B V. High-quality. steel rolling: theory and practice[M]. New York: Marcel Dekker, 1993.
[2] WOLTERS H. Strip profile and flatness control in hot strip mills with particular reference to CVC technology[C]//4th International Steel Rolling Conference, June 1-3, 1987, Deauville, France, 1987: A20.1-A20.7.
[3] NAKAMURA M, ARATANI H, HIRASE K, et al. Pair-crossed rolling mill-Mitsubishi PC mill[C]//4th International Steel Rolling Conference, June 1-3, 1987, Deauville, France, 1987: A22.1-A22.8.
[4] KERSTING E, TEICHERT H. The UPC technology[C]//4th International Steel Rolling Conference, June 1-3, 1987, Deauville, France, 1987: A19.1-A19.7.
[5] HE Anrui, ZHANG Qingdong, XU Jianyong, et al. Shape control performance of 1 800 mm virtual mills[J]. Journal of University of Science and Technology Beijing, 2004, 26(2): 91-94. (in Chinese)
[6] WANG Renzhong, HE Anrui, YANG Quan, et al. Research on the strip shape control capability of LVC work roll contour[J]. Iron and Steel, 2006, 41(2): 41-44. (in Chinese)
[7] ZHANG Jie, CHEN Xianlin, XU Yaohuan, et al. Roll contour design of 4-high mill with variable crown by axial shifting[J]. Journal of University of Science and Technology Beijing, 1994, 16(11): 98-101. (in Chinese)
[8] HE Anrui, YANG Quan, XU Jinwu, et al. Backup roll contour in finishing trains of hot rolling based on hybrid genetic algorithm[J]. Journal of University of Science and Technology Beijing, 2002, 9(6): 233-236.
[9] HE Anrui, ZHANG Qingdong, XU Jinwu, et al. Genetic algorithms of work roll wear model for hot rolling[J]. Iron and Steel, 2000, 35(2): 56-59. (in Chinese)
[10] WANG Renzhong, HE Anrui, YANG Quan, et al. Thermal contour model of work rolls in hot wide strip mills[J]. Journal of University of Science and Technology Beijing, 2004, 26(12): 655-657. (in Chinese)
[11] CHEN Xianlin, ZOU Jiaxiang. A specialized finite element model for investigating controlling factors affecting behavior of rolls and strip flatness[C]//4th International Steel Rolling Conference, June 1-3, 1987, Deauville, France, 1987: E4.1-E4.7.
[12] HE Anrui, YANG Quan, HUANG Haodong, et al. Application of flatness feedback control system to hot strip mills[J]. Iron and Steel, 2006, 41(2): 55-58. (in Chinese)

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