Comprehensive Shape Control Technology for CSP Hot Strip Mills

With the increasing demand on higher strip quality, the profile and flatness of hot rolling strips have become subjects of concern, particularly for compact strip product(CSP) hot strip mills. Based on the roll contour, control model, and rolling process, a comprehensive shape control technology is...

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Bibliographic Details
Published inInternational journal of automation and computing Vol. 12; no. 6; pp. 611 - 619
Main Authors Chen, Chao-Chao, Shao, Jian, He, An-Rui, Zhang, Nan-Feng
Format Journal Article
LanguageEnglish
Published Beijing Institute of Automation, Chinese Academy of Sciences 01.12.2015
Springer Nature B.V
Subjects
Accuracy
CAE) and Design
Compact
Computer Applications
Computer-Aided Engineering (CAD
Continuous casting
Contour milling
Contour rolling
Control
Design optimization
Engineering
Feedback control
Finishing mills
Flatness
Hot rolling
Hot strip mills
Mechatronics
mills;roll
product(CSP);hot
Regular Paper
Rejection rate
Robotics
Rolling mills
Shape control
strip
Strip mills
Technology
Work rolls
hot strip mills
shape control
roll contour
rolling process
Compact strip product (CSP)
control model
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Summary:With the increasing demand on higher strip quality, the profile and flatness of hot rolling strips have become subjects of concern, particularly for compact strip product(CSP) hot strip mills. Based on the roll contour, control model, and rolling process, a comprehensive shape control technology is proposed and applied to CSP hot strip mill of Lianyuan steel, which includes optimization and design of the work roll contour and varying contact back-up roll(VCR) plus backup roll contour, analysis of the flatness feedback control model, as well as improvement of the rolling process control system. The application of the technology has significantly improved the shape control performance. The roll wear is improved and the general roll consumption of the finishing mill is reduced by 29.86%.The percentages that satisfy the control target ranges of the average strip flatness and crown are increased by approximately 15.40%and 14.82%, respectively. The rejection rate of grade Q235 due to shape quality problem is reduced monthly by 39.69%, which creates significant economic benefits for the plant.
Bibliography:Compact strip product(CSP);hot strip mills;roll co
Chao-Chao Chen;Jian Shao;An-Rui He;Nan-Feng Zhang;National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing;CSP Hot Strip Mill, Hunan Valin Lianyuan Iron & Steel Co., Ltd
With the increasing demand on higher strip quality, the profile and flatness of hot rolling strips have become subjects of concern, particularly for compact strip product(CSP) hot strip mills. Based on the roll contour, control model, and rolling process, a comprehensive shape control technology is proposed and applied to CSP hot strip mill of Lianyuan steel, which includes optimization and design of the work roll contour and varying contact back-up roll(VCR) plus backup roll contour, analysis of the flatness feedback control model, as well as improvement of the rolling process control system. The application of the technology has significantly improved the shape control performance. The roll wear is improved and the general roll consumption of the finishing mill is reduced by 29.86%.The percentages that satisfy the control target ranges of the average strip flatness and crown are increased by approximately 15.40%and 14.82%, respectively. The rejection rate of grade Q235 due to shape quality problem is reduced monthly by 39.69%, which creates significant economic benefits for the plant.
11-5350/TP
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1476-8186
2153-182X
1751-8520
2153-1838
DOI:10.1007/s11633-015-0939-1