Rolling Schedule Multi-objective Optimizationbased on Influence Function for Thin Gauge Steel Strip in Tandem Cold Rolling

Bu, Henan; Yan, Zhu-Wen; Zhang, D.H.; Chen, S.Z.

doi:10.24200/sci.2016.3975

Cited by 9 publications

(8 citation statements)

References 20 publications

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“…The proposed bending force multi-objective preset model has been tested in a 1,450 mm tandem cold rolling mill (Bu et al , 2016). The main equipment parameters of the production line are shown in Table I.…”

Section: Field Test and Results Analysismentioning

confidence: 99%

Multi-objective optimization of bending force preset in cold rolling

Zhou

Yan

et al. 2019

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Purpose In the process of cold rolled strip, there is tight coupling between flatness control and gauge control. The variation of the roll gap caused by the change of bending force will lead to the change of rolling force. Furthermore, it can cause a deep impact on the control accuracy of strip exit thickness and exit crown. The purpose of this paper is to improve the accuracy of the bending force preset value for cold rolled strip. Design/methodology/approach In this paper, the bending force preset control strategy with considering of rolling force was proposed for the first time and the preset objective function of bending force was established on the basis of the two-objective optimization of bending force and rolling force. Meanwhile, the multi-objective intelligent algorithm – INSGA-II – was used to solve the objective function. Findings The proposed bending force multi-objective preset model has been tested in a 1,450 mm tandem cold rolling line. The analyzed results of field data show that the deviations of strip exit thickness and exit crown are reduced effectively by using the improved model, and at the same time, more reasonable bending force preset values are obtained, which can enhance the accuracy of flatness preset control. Originality/value A preset model of bending force with considering flatness and gauge is proposed in this paper and the multi-objective function of bending force preset is established on the basis of the two-objective optimization of bending force and rolling force. The value lies in proposing a new decoupling method of rolling force and bending force.

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Section: Field Test and Results Analysismentioning

confidence: 99%

Multi-objective optimization of bending force preset in cold rolling

Zhou

Yan

et al. 2019

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“…(6) e fitness F fitness of each individual in the population is calculated. (7) When the condition t < T is satisfied, turn to (8).…”

Section: Coordinated Algorithm Based On Topkis-veinott and Genetic Algorithmmentioning

confidence: 99%

“…In the actual application process, the main incongruous actuator group behaviors are as follows: When a symmetrical flatness defect is detected by shapemeter roll, the work roll tilting may participate in the flatness regulating process [7][8][9]. However, the additional flatness change is caused by work roll tilting, which will consume the regulating margin of other actuators in the flatness closed-loop control system [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Collaboration Strategy Based on Conflict Resolution for Flatness Actuator Group

Yan

Wang

et al. 2021

Mathematical Problems in Engineering

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During the flatness control process, there are frequently some uncoordinated regulating behaviors in the flatness actuator group. This has a bad influence on the flatness control accuracy and the flatness control efficiency. Therefore, a collaboration strategy based on conflict resolution for the flatness actuator group has been proposed in this paper. First of all, the feature of flatness measurement value is extracted through establishing the actual flatness condition discriminating factor. After that, the coordination cooperation that is appropriate to the actual flatness condition is developed for the flatness actuator group. Finally, the optimal adjustment of the actuator population is solved by the coordinated algorithm of Topkis-Veinott and genetic algorithm collaborative optimization. The collaboration strategy proposed in this paper has been successfully applied to a flatness control system of a 1450 mm five-stand cold rolling mill.

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“…The method of establishing elastoplastic finite element equation considering inertial force and damping force is called dynamic analysis method [14] . The plastic processing engineering load action time is relatively short.…”

Section: Three-dimensional Finite Element Model Establishmentmentioning

confidence: 99%

Comprehensive Analysis of Metal Deformation Law Based on Numerical Simulation of Cold Rolling Process

Yan¹,

Wang²,

Bu³

et al. 2020

Preprint

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Through taking the cold rolling process as the research object, the three-dimensional finite element model of the strip rolling process is established by using ANSYS/LS-DYNA software. The simulation results of the finite element model have a good fit with the actual production data. The rolling process is dynamically simulated, and the distribution curves of important rolling parameters such as equivalent stress, control efficiency coefficient, transverse rolling pressure, lateral thickness and work roll deflection is obtained. The research results of this paper have strong practicability for the process control of cold strip rolling mill. The research results have certain guiding significance for the development and optimization of the rolling control system.

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Rolling Schedule Multi-objective Optimizationbased on Influence Function for Thin Gauge Steel Strip in Tandem Cold Rolling

Cited by 9 publications

References 20 publications

Multi-objective optimization of bending force preset in cold rolling

Multi-objective optimization of bending force preset in cold rolling

Collaboration Strategy Based on Conflict Resolution for Flatness Actuator Group

Comprehensive Analysis of Metal Deformation Law Based on Numerical Simulation of Cold Rolling Process

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