A flying gauge change model in tandem cold strip mill

Wang, J S; Jiang, Zhengyi; Liu, X H; Wang, Guodong

doi:10.1016/j.jmatprotec.2007.11.046

Cited by 26 publications

(11 citation statements)

References 7 publications

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“…Variable gauge rolling has been widely used in Mizushima Automatic Plan View Pattern Control System rolling (MAS rolling) [9], Tailor Rolled Blank (TRB) [10], Longitude Profile (LP) hot rolling [11], and Flying Gauge Change (FGC) [12]. To compensate for the irregular shape of the workpiece in medium plate rolling, the MAS rolling method is adopted to improve the shape in the middle pass.…”

Section: Open Accessmentioning

confidence: 99%

“…Wang et al [18] proposed the design method of transition zone curve, and deduced the velocity models of workpiece's horizontal motion and upward and downward roll motion, but the specific procedure to calculate the neutral angle contained in these velocity models was not given. Wang et al [12] adopted variable gauge rolling technology in FGC and studied the setting principle of the roll gap and roll circumferential speed. Yu et al [19] derived the forward slip equation in the variable gauge rolling process according to the equal flow per second, and analyzed the influence of different kinds of transition zone shapes on the forward slip, and compared them with the results of a finite element simulation.…”

Section: Open Accessmentioning

confidence: 99%

“…According to the velocity field in Eq. ( 6), the velocity discontinuity at the inlet of the zone (x = l) is Therefore, the shear power Ẇus1 at the inlet of the zone is At the exit of the zone (x = x 0 ) Hence, the shear power Ẇus2 at the exit of the zone is Then the total shear power is (12…”

Section: Shear Powermentioning

confidence: 99%

See 2 more Smart Citations

Prediction and Analysis of the Force and Shape Parameters in Variable Gauge Rolling

Liu

Wang

et al. 2022

Chin. J. Mech. Eng.

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Variable gauge rolling is a new process to obtain a plate for which the thickness changes continuously by continuously and dynamically adjusting the roll gap upward and downward in the rolling process. This technology is an effective method for producing lightweight, low-cost, and economical plates. However, variable gauge rolling is an unsteady process, and the changes in the force and deformation parameters are complex. In this research, based on the minimum energy theory of the variational principle and considering the characteristics of the roll movement and workpiece deformation comprehensively, the internal plastic deformation, friction, shear and tension powers, and the minimum result of the total power functional in upward and downward rolling are obtained with the first integral and then with a variation of adopting the specific plastic power and strain rate vector inner product. The analytical results of the deformation and force parameters are also established using the variational method. Then the precision of this model is certified using the measured values in a medium plate hot rolling plant and the experimental data for Tailor Rolled Blank rolling. Good agreement is found. Additionally, the variation rule of bite angle, neutral angle, and location neutral points are shown, and the change mechanism of the friction parameter on the stress state effect coefficient is given in variable gauge rolling. This research proposes a new mathematical model for rolling process control that provides a scientific basis and technical support for obtaining an accurate section shape in variable gauge rolling production.

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Section: Open Accessmentioning

confidence: 99%

Section: Open Accessmentioning

confidence: 99%

See 1 more Smart Citation

Prediction and Analysis of the Force and Shape Parameters in Variable Gauge Rolling

Liu

Wang

et al. 2022

Chin. J. Mech. Eng.

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“…[18] presented a simulation system that can provide a set of process parameters based on the available information and the quality requirement of products. [19] developed a model for satisfying the requirement of the flying gauge change control in tandem cold strip mill with the conditions of different strip gauges and tensions. [20] proposed a mathematical model in the form of transfer function matrix for the flatness control of strip mills.…”

Section: Process Descriptionmentioning

confidence: 99%

Decoupling based decentralized robust control for combined shape and gauge system in tandem cold rolling process

Peng

Tong

Xiao

2009

Proceedings of the 48h IEEE Conference on Decision and Control (CDC) Held Jointly With 2009 28th Chinese Control Conference

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In this paper, we proposed a new control scheme of decoupling based decentralized robust control for a typical two-input two-output system in tandem cold rolling process. A dynamic coupled model of shape and gauge system was developed based on some field data. Then we proposed a new control scheme for the combined system. The controller consists of a decoupler and a set of robust controllers. The interactions could be mainly dealt with by the decoupler, and robust controllers could guarantee good performance of decoupling control and the robustness of each isolated subsystem. An example was given to illustrate the proposed control strategy. Simulation results showed excellent decoupling effectiveness, input tracking, disturbance rejection and parameter perturbation rejection.

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“…To obtain a good thickness strip, many research studies have been conducted. An effective computer control model for flying gauge change (FGC) rolling was established in the tandem cold rolling system to obtain the strip thickness with high accuracy during FGC rolling (Wang et al , 2008). A set-up model for maximizing the throughput of a tandem cold rolling mill was presented (Reddy and Suryanarayana, 2001).…”

Section: Introductionmentioning

confidence: 99%

A novel forecast model based on CF-PSO-SVM approach for predicting the roll gap in acceleration and deceleration process

Sun

Peng

et al. 2020

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Purpose In the cold rolling process, friction coefficient, oil film thickness and other factors vary dramatically with the change in the rolling speed, which seriously affects the strip thickness deviation. This paper aims to study the law among the parameters in the rolling process to improve the strip control precision. Design/methodology/approach In this paper, a novel forecasting model of the roll gap based on support vector machine (SVM) optimized by particle swarm optimization with compression factor (CF-PSO) is proposed. Based on lots of online data, the roll gap models regressed by PSO-SVM, genetic algorithm (GA)-SVM and CF-PSO-SVM are obtained and verified through evaluating the performances with the decision coefficient (R2), mean absolute error and root mean square error. In addition, with the good forecasting performances of CF-PSO-SVM, a roll gap compensation model is studied. Findings The results indicate that the proposed CF-PSO-SVM has excellent learning regression ability compared with other optimization algorithms. And the obtained roll gap compensation model based on the rolling speed and plastic coefficient have been applied in product, which is validated and gets a good product effect. Originality/value In this paper, the SVM algorithm is combined with traditional rolling technology to solve the problems in actual production, which has great supporting significance for the improvement of production efficiency.

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A flying gauge change model in tandem cold strip mill

Cited by 26 publications

References 7 publications

Prediction and Analysis of the Force and Shape Parameters in Variable Gauge Rolling

Prediction and Analysis of the Force and Shape Parameters in Variable Gauge Rolling

Decoupling based decentralized robust control for combined shape and gauge system in tandem cold rolling process

A novel forecast model based on CF-PSO-SVM approach for predicting the roll gap in acceleration and deceleration process

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