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Application of Adaptive Threading Technique to hot strip mill

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Journal of Iron and Steel Research International 2008年第5期15卷 29-31,36页

作者： DING Jing-guo HU Xian-lei JIAO Jing-min SHE Guang-fu LIU Xiang-hua State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China hot strip mill Panzhihua Iron and Steel Group Co Ltd Panzhihua 617062 Sichuan China

Thickness deviation of hot strip rolling needs to be strictly controlled in the computer system. An adaptive threading technique was researched, in which the measured data from threaded stands were used to predict thickness and material hardness errors, to modify the setup for the remaining unthreaded stands. After the adaptive threading model was used online on the hot strip mill of the Panzhihua Iron and Steel Group Co Ltd, the thickness deviation was decreased obviously. The hit rate of thickness control of different steel grades increases.

关键词： hot strip mill adaptive threading thickness deviation stretch equation

Opti mization and Model of Laminar Cooling Control Systemfor hot strip mills

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Journal of Iron and Steel Research International 2006年第1期13卷 18-22页

作者： XIE Hai-bo LIU Xiang-hua WANG Guo-dong ZHANG Zhong-ping State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China School of Mechanical Engineering Nanhua University Hengyang 421001 Hunan China hot strip mill Panzhihua Iron and Steel （Group） Co Panzhihua 617062 Sichuan China

The structure of laminar cooling control system for hot rolling was introduced and the control mode, cooling strategy, segment tracking and model recalculation were analyzed. The parameters of air/water cooling models were optimized by regressing the data gathering in situ, and satisfactory effect was obtained. The coiling temperature can be controlled within ±15℃.

关键词： hot rolled strip laminar cooling control system model parameter optimization

Roll shifting strategy with varying stroke and step in hot strip mill

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Journal of Central South University 2012年第5期19卷 1226-1233页

作者：李维刚刘相华郭朝晖黄建平 College of Information Science and Engineering Northeastern University Automation Division Baosteel Research InstituteBaoshan Iron&Steel Co.Ltd. Research Institute of Science and Technology Northeastern University hot strip mill Plant Baoshan Iron&Steel Co.Ltd.

A new roll shifting strategy with varying stroke and varying step was investigated,Two characteristic parameters including cat ear height and gap contour smoothness were introduced to assess the effect of shifting strategy on roll wear,and the relation between characteristic parameters and shifting strategy was *** varying stroke and varying step can reduce cat ear height and gap contour smoothness,so the shifting strategy with varying stroke and varying step is better than the one with either varying stroke or varying step,Based on the effect of shifting control parameters on characteristic parameters of roll wear,the selection principle of these shifting control parameters was gained.A case study was conducted to validate the proposed roll shifting strategy,reducing uncontrollable quartic loading gap contour,improving strip profile and extending rolling length of a rolling campaign.

关键词： hot rolling work roll shifting varying step roll wear roll contour schedule free rolling

PROFILE AND FLATNESS CONTROL SYSTEM IN 1700mm hot strip millS OF ANSTEEL

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Chinese Journal of Mechanical Engineering 2008年第3期21卷 103-107页

作者： HE Anrui YANG Quan CHEN Xianlin ZHAO Lin National Engineering Research Center for Advanced Rolling Technology University of Science and Technology Beijing Beijing 100083 China hot strip Plant Anshan Iron ＆ Steel Group Company Anshan 114021 China

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 μm 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 fiatness control system. In addition, schedule-free rolling is realized.

关键词： hot strip mills Profile and flamess control Roll contour Schedule-free rolling

Modeling and Simulation of Hydraulic Roll Bending System Based on CMAC Neural Network and PID Coupling Control Strategy

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Journal of Iron and Steel Research International 2013年第10期20卷 17-22页

作者： JIA Chun-yu SHAN Xiu-ying CUI Yan-cao BAI Tao CUI Fa-jun College of Mechanical Engineering Yanshan University hot strip mill of Jinan Iron and Steel Co. Ltd

The hydraulic roll bending control system usually has the dynamic characteristics of nonlinearity, slow time variance and strong outside interference in the roiling process, so it is difficult to establish a precise mathemati- cal model for control. So, a new method for establishing a hydraulic roll bending control system is put forward by cerebellar model articulation controller （CMAC） neural network and proportional-integral-derivative （PID） coupling control strategy. The non-linear relationship between input and output can be achieved by the concept mapping and the actual mapping of CMAC. The simulation results show that, compared with the conventional PID control algo- rithm, the parallel control algorithm can overcome the influence of parameter change of roll bending system on the control performance, thus improve the anti jamming capability of the system greatly, reduce the dependence of con- trol performance on the accuracy of the analytical model, enhance the tracking performance of hydraulic roll bending loop for the hydraulic and roll bending force and increase system response speed. The results indicate that the CMAC-P1D coupling control strategy for hydraulic roll bending system is effective.

关键词： hydraulic roll bending CMAC neural network PID control genetic algorithm

Development of strip Flatness and Crown Control Model for hot strip mills

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Journal of Iron and Steel Research International 2010年第3期17卷 21-27,45页

作者： LI Hai-jun XU Jian-zhong WANG Guo-dong SHI Li-jun XIAO Yong State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China China Offshore Oil Engineering Co Ltd Tianjin 300452 China hot strip Plant Ganglu Iron and Steel Group Co Tangshan 064200 Hebei China

The strip flatness and crown control model is the foundation of automatic strip shape control. Considering the metal transverse flows and the inter stand second deformation, the trip flatness and crown control model has been developed, which can be applied to CVC mills and PC mills as well as normal four-high mills. The strip flatness and crown control model has high precision, and has been successfully applied to the automatic strip shape control system reconstruction of Tangshan Ganglu 1 250 mm hot strip plant.

关键词： strip flatness crown automatic strip shape control hot strip influence function method

A novel mechanism fusion data control method for slab camber in hot rolling

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Journal of Iron and Steel Research International 2023年第5期30卷 960-970页

作者： Le-bao Song Dong Xu Peng-fei Liu Jin-hang Zhou Hui-qing Yan Jing-dong Li Hai-nan He Hai-jun Yu Xiao-chen Wang Quan Yang National Engineering Technology Research Center of Flat Rolling Equipment University of Science and Technology BeijingBeijing 100083China Xinjiang Joinworld Co. Ltd.Urumqi 830000XinjiangChina 2250 hot strip mill Hunan Lianyuan Iron and Steel Co.Ltd.Loudi 417000HunanChina

For asymmetric plate shape,control over the hot rolling process mainly depends on the subjective judgement and personal experience of the operator as there are great deviations and much instability in hot ***,the intrinsic mechanisms and sensitivity affecting characteristic parameters and variables in the asymmetric rolling process remain ***,a novel mechanism fusion data control method for slab camber in hot rolling using dimensional analysis and data-driven technique was *** approach of dimensional analysis was used to establish a mathematical model and analyse the main parameters affecting the slab camber of the rough ***,the established mathematical model combined with the data-driven techniques was employed to accurately predict the slab bending ***,the superiority and effectiveness of the proposed model were demonstrated by a comparison with three regression ***,the proposed control strategy was successfully applied in a 1580 mm hot rolling industrial *** automatic control results show that the hit rate of slab cambers in different sizes from 10 to 30 mm is improved,and the quality stability of intermediate slab is significantly improved.

关键词： Mechanism model Dimensional analysis Data-driven technique Camber control hot rolling

Mathematical Models of Logistics Decision in Slab Yard in an Iron and Steel Complex

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International Journal of Minerals,Metallurgy and Materials 2000年第4期14卷 301-304页

作者： Sujian Li Zhiming Chan Mechanical Engineering School University of Science and Technology BeijingBeijing 100083China hot strip mill Plant of Wuhan Iron&Steel(Group)Corp. Wuhan 430083China

The slab yard in a hot strip rolling mill is a key link and a buffer in the production system, which joins continuous rolling process and continuous casting process. There are a large quantity of operations of input and output in the slab yard. Throughout systematic analysis and research on the slab yard, the mathematical models of logistics decision for input, output and restorage operation are built. On the basis of these decision models, the management system for the slab yard is developed. Simulation application to Human Iron & Steel Complex of China shows that they are very effective.

关键词： Slab mills

Development and future prospect of hot strip rolling technology at Baosteel

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Baosteel Technical Research 2008年第3期2卷 38-48页

作者： Huang Chuanqing Zhang Wenxue hot strip Rolling Plant Baosteel Branch Baoshan Iron ＆ Steel Co. Ltd. Shanghai 200941 China

Since the 2050 mm hot strip mill was put into operation in 1989, Baosteel has made great achievements in increasing productivity, developing new process technologies and steel products and improving product quality. In the past 18 years from 1989 to 2007 ,Baosteel has constructed five hot strip mills with a total annual capacity of 19.8 Mt. Indices for technology standards, product categories and steel grades, product quality, both technically and economically, take the lead domestically or reached the world class level. As there are many hot strip mills that expected to be put into operation by the end of 2010 ,the overall annual capacity will exceed 30 Mt ,and the product will cover grain oriented （GO） Si steels and alloyed steels.

关键词： hot strip rolling pipeline steel 05 steel sheet tinned sheet container steel sheet Si steel