Edge Drop Control Technology of 4-Hi Tandem Cold Rolling Mill on the Premise of Considering Roll Grinding Accuracy

Yang, Guang Hui; Cao, Jian; Zhang, Jie; Yin, Xiao Qin; Jia, Sheng; Zeng, Wei

doi:10.4028/www.scientific.net/amr.291-294.732

Cited by 4 publications

(3 citation statements)

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“…The bending force of work roll is from -180 to 360 KN/ side , the bending force of intermediate roll is from 0 to 500 KN/ side , the shift of work roll is from -100 to 25 mm , the shift of intermediate roll is from -100 to 50mm . The edge drop is caused by not only elastic deformation of work roll but also transverse metal flow and three dimensional deformation of strip [7]. The model in which the elastic deformation of roll and the plastic deformation of strip are considered as a whole is used to analyze the edge drop.…”

Section: The Establishment Of the Analytic Modelmentioning

confidence: 99%

The Analysis of Influence on the Edge Drop of Tandem Cold Rolling Mill

Xiao

Cheng

2014

AMM

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Edge-drop control enlarges the shape control theories and technologies. But compared to the profile and flatness control technology, the edge drop control is a developing topic. This paper analyze the influence of strip thickness, strip width, reduction ratio, friction coefficient and deformation resistance on the edge drop based on the elastic deformation of rolls and the three-dimensional plastic deformation of strip for UCMW cold rolling mill. The results will support the further research on the edge drop control for cold rolling mill.

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Section: The Establishment Of the Analytic Modelmentioning

confidence: 99%

The Analysis of Influence on the Edge Drop of Tandem Cold Rolling Mill

Xiao

Cheng

2014

AMM

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“…However, the roller surface is damaged due to the comprehensive effect of the stress in the rolling process. Therefore, it is necessary to grind the rollers damaged to reuse them in rolling process, [1][2][3][4][5] and rollers and roller grinding machine are shown in Figure 2. Consequently, the roller grinding workshop is an indispensable factor to ensure the high quality, efficiency, and stability of the rolling process.…”

Section: Introductionmentioning

confidence: 99%

The study of intelligent scheduling algorithm oriented to complex constraints and multi-process roller grinding workshop

Wang

Jiang³

et al. 2020

Advances in Mechanical Engineering

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Roller grinding workshop is a typical multi-unit and multi-task manufacturing scenario, which is aimed to repair the surface damage of the rollers caused by the rolling process, so that the rollers can be reused. Due to the process complexity of roller grinding workshop and the large volume and weight of the roller, hoisting and transportation mode with multiple cranes is required. Consequently, the scheduling of the roller grinding workshop needs to consider both the task sequencing in time and the noninterference of the multi-crane trajectory in space. In this paper, the intelligent scheduling of roller grinding workshop is studied based on the characteristics of complex tasks and space-time coupling constraints. Firstly, the scheduling basis is established based on priority rules and process constraints. In order to solve the scheduling problem under the space-time coupling constraints, the position coordinate system is established, and then the algorithms of crane position tracking and cooperative motion without interference are developed. Further, considering the transportation time of crane and its out of sync time point with the processes, the intelligent decision and scheduling algorithm are developed based on the dynamic priority strategy defined to realize scheduling, including time decision, crane decision, and process decision. With the developed intelligent scheduling algorithm applied, the simulation of the roller grinding workshop is conducted under three combinations of priority strategy and noninterference strategy to verify algorithm performance. Under the guarantee of crane noninterference during the full production, the efficiency is improved by 22.1% compared with the existing processing mode of industry. Additionally, EPTR (effective process time rate) based on dynamic priority strategy and noninterference strategy B is up to 100% to avoid intervals between two processes in the scheduling. The dynamic priority developed in this paper reveals more efficiency than MOR principle, while with the strategy B the CUR (crane utilization rate) can be improved more than 20% under the condition of enough machines which facilitates to obtain shorter makespan than strategy A. The intelligent scheduling algorithm developed guarantees the effectiveness and rationality of scheduling with multi-unit and multi-task under the complex constraints. Finally, in order to realize the automatic and intelligent operation of the roller grinding workshop, the management software of the roller grinding workshop is developed by integrating the intelligent scheduling algorithm, which realizes the intelligent production, monitoring, and management of the roller grinding workshop during the full production cycle.

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“…Flatness control precision has satisfied the demand of users, but edge drop control level still has no breakthrough. The edge drop of strip will directly influence the side scrapping of strip and reduce the product yield [1,2]. In recent years, the edge drop control has become the concern issue in the rolling process control field [3].…”

Section: Introductionmentioning

confidence: 99%

Neural Network Inverse Decoupling Control of Flatness and Edge Drop for Tandem Cold Rolling Mill

Xiao

Mao

2012

AMR

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Realizing the decoupling control of them is one of the most important issues to achieve the flatness and edge drop high-precision control. In this paper, the flatness and edge drop control capabilities of all the control actuators are analyzed. The coupling relation of flatness and edge drop is analyzed. The neural network inverse decoupling control method is proposed to realize the decoupling control of flatness and edge drop. Simulation results represent that the flatness and edge drop control performance is improved effectively.

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Edge Drop Control Technology of 4-Hi Tandem Cold Rolling Mill on the Premise of Considering Roll Grinding Accuracy

Cited by 4 publications

References 0 publications

The Analysis of Influence on the Edge Drop of Tandem Cold Rolling Mill

The Analysis of Influence on the Edge Drop of Tandem Cold Rolling Mill

The study of intelligent scheduling algorithm oriented to complex constraints and multi-process roller grinding workshop

Neural Network Inverse Decoupling Control of Flatness and Edge Drop for Tandem Cold Rolling Mill

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