Analytical approach of asymmetrical thermomechanical rolling by slab method

Razani, N. A.; Dariani, Bijan Mollaei; Soltanpour, Mahdi

doi:10.1007/s00170-017-0801-4

Cited by 9 publications

(5 citation statements)

References 28 publications

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“…In their models, Salimi [2] and Zhang [3] took shear stress into account. Razani et al [4] established a new model to calculate the roll force considering the rate-dependent condition of yield stress. Huang and his coworkers [5] built analytical models using the slab method to calculate the mechanical parameters in asymmetrical cold strip rolling, and the finite element method was employed in their further work [6].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Asymmetrical Rolling of Ultra-Thin Strips Considering Elastic Deformation of the Strips

Zhao,

Hu,

Liu

2024

Materials

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In normal cold rolling, the elastic deformation of the strip is typically ignored because of the dominant plastic deformation. However, this neglect may introduce additional errors when the strip is very thin. The aim of this study is to investigate the characteristics of the deformation region and thickness reduction in the asymmetrical rolling of ultra-thin strips. Mathematical models were developed based on the slab method, with consideration of the elastic deformation of the strips, and employed in the simulation calculation. The percentage of the three zones and the thickness reduction were analyzed using the simulation results. An increase in the speed ratio results in an increase in the reduction ratio, which is influenced by parameters, such as front tension, back tension, friction coefficient, and entry thickness. The elastic deformation of the strip reduces the tension and the roll pressure and causes the reduction ratio to decrease. The findings and conclusions of this study may be helpful to the mill operating in the asymmetrical rolling process of ultra-thin strips.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Asymmetrical Rolling of Ultra-Thin Strips Considering Elastic Deformation of the Strips

Zhao,

Hu,

Liu

2024

Materials

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“…Analytical models considering the vertical shear stress were developed by Zhang et al [ 7 ] to calculate the roll force and torque. Razani et al [ 8 ] established a new model considering the rate-dependent condition of yield shear stress using the slab method to calculate the rolling force in asymmetrical thermomechanical rolling.…”

Section: Introductionmentioning

confidence: 99%

“…Razani et al [8] established a new model considering the rate-dependent condition of yield shear stress using the slab method to calculate the rolling force in asymmetrical thermomechanical rolling.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Mechanical Parameters in Multi-Pass Asymmetrical Rolling of Strip by Slab Method

Zhao,

Hu,

Liu

2023

Materials

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Mechanical parameters, time consumption and energy consumption are important considerations in the application of a certain rolling process. This study aims to investigate characteristics of the roll force, roll torque, roll power, rolling time and total work in multi-pass asymmetrical rolling of strip. Mathematic models were built using the slab method to calculate parameters in the asymmetrical rolling process, and the characteristics of these parameters were analyzed on the basis of simulation results. Mechanical parameters are affected by the change of deformation region type. When the speed ratio is less than the critical speed ratio, the roll force, absolute values of roll torque and roll power are found to increase with the increase in the speed ratio. After the speed ratio reaches the critical speed ratio, the roll force, roll torque and lower roll power keep constant, but the upper roll power continues increasing. The upper roll torque and upper roll power required by asymmetrical rolling are much greater than that by symmetrical rolling, which indicates that stronger drive shafts and more powerful drive motors are required by asymmetrical rolling. Compared with symmetrical rolling, asymmetrical rolling requires less roll force to obtain the same thickness reduction, especially for thin and hard strips. Rolling time can be saved at the cost of more energy consumption by using asymmetrical rolling with the same roll force to attain the same final thickness. The results and conclusions of this study can provide a reference for mill design and application of asymmetrical rolling in strip manufacturing.

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“…However, the previous rules cannot be used during the flat rolling process of the CORFT, which is a plan deformation problem. In this paper, first the inner core material and outer steel tube were successively analyzed based on the slab method [18][19][20][21] during the flat rolling process (plan deformation) of the CORFT, and equations for wall thickness s, the relative density z of the core material (the ratio between the core density and the granular density of the core material), and roll force F d were developed. Then, flat rolling experiments on tubes and CORFTs were conducted, and the theoretical results solved by the developed equations were compared with the experimental results.…”

Section: Introductionmentioning

confidence: 99%

Research on the deformation law for flat rolling of a core filled tube based on the slab method

Gao

et al. 2020

PLoS ONE

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The deformation law for axisymmetric deformation during the drawing of a core filled tube (CORFT) has been studied. However, the results of such studies could not be used in the flat rolling process of the CORFT, which is a plan deformation condition. In this paper, the inner core material and outer steel tube were successively analyzed based on the slab method during the flat rolling process (plan deformation) of the CORFT, and equations for wall thickness, core density, and roll force have been developed. The theoretical results solved by the developed equations were compared with the experimental results, revealing adequate accuracy for engineering requirements. The influences of rolling parameters on the roll force and the ultimate value of the relative density of the core material were studied, and the limiting condition for a larger roll force or higher value for relative density was obtained.

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Analytical approach of asymmetrical thermomechanical rolling by slab method

Cited by 9 publications

References 28 publications

Analysis of the Asymmetrical Rolling of Ultra-Thin Strips Considering Elastic Deformation of the Strips

Analysis of the Asymmetrical Rolling of Ultra-Thin Strips Considering Elastic Deformation of the Strips

Analysis of Mechanical Parameters in Multi-Pass Asymmetrical Rolling of Strip by Slab Method

Research on the deformation law for flat rolling of a core filled tube based on the slab method

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