Modified slab analysis of asymmetrical plate rolling

Salimi, M.; Sassani, Farrokh

doi:10.1016/s0020-7403(02)00043-7

Cited by 76 publications

(35 citation statements)

References 16 publications

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“…9 in which the results of the present model are compared with those obtained by the finite element method [15], modified slab method [14], and also experimental findings of Kennedy and Slamar [11] as well as Buxton and Browning [1]. Geometry of the process being studied in this figure is so that the angle of bite is around 34.5°.…”

Section: Estimation Of the Outgoing Curvaturementioning

confidence: 90%

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Asymmetrical sheet rolling analysis and evaluation of developed curvature

Qwamizadeh

Kadkhodaei

Salimi

2011

Int J Adv Manuf Technol

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A theoretical method based on slab method of analysis is presented to give an account to the developed curvature in asymmetrical sheet rolling where the work rolls radii, their speeds, and the interfacial frictions may be different. In this model the ingoing sheet is considered to be guided to enter the roll gap horizontally and the work rolls may have different pressure distributions. The nonuniformity of normal and shear stresses acting along the vertical sides of each slab are taken into account, and the equilibrium equations together with the yield relations are considered as the governing equations. The strip curvature at exit is calculated based on the differences in shear as well as normal strains within the upper and lower portions of the slab. Results are compared with analytical and experimental findings of previous investigators and are shown to be in good agreement.

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Section: Estimation Of the Outgoing Curvaturementioning

confidence: 90%

“…Salimi and Sassani [14] proposed a modified slab method to predict the outgoing curvature of the sheet by studying the variations of normal and shear strains within the roll gap. They assumed linear shear stress distribution along the thickness of each slab.…”

Section: Introductionmentioning

confidence: 99%

Asymmetrical sheet rolling analysis and evaluation of developed curvature

Qwamizadeh

Kadkhodaei

Salimi

2011

Int J Adv Manuf Technol

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“…Asymmetrical rolling is where the rolling velocities, of the work rolls, are different [19,20]. As shown in Figure 2(a), the work rolls have unequal diameters and therefore unequal velocities.…”

Section: Introductionmentioning

confidence: 99%

“…A study by Pan and Sansome [22] has shown that asymmetrical rolling can decrease the rolling force and torque by up to 40%. It has also been shown that there is a significant reduction in the rolling pressure [19] and that it is an effective method for large thickness reduction [19].…”

Section: Introductionmentioning

confidence: 99%

Improving Thin Strip Profile Using Work Roll Cross and Work Roll Shifting Methods in Cold Strip Rolling

Tibar

Jiang

2017

International Journal of Metals

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The optimization of rolling parameters in order to achieve better strip shape and to reduce rolling force is a challenge in rolling practice. In this paper, thin strip asymmetrical rolling of aluminum at various speed ratios under lubricated condition has been investigated at various combinations of work rolls cross (WRC) angles and work rolls shifting (WRS) values. The effects of strip width, reduction, and rolling speed on strip shape taking WRC and WRS into consideration are discussed. Results show that strip profile improves significantly when the WRC angle is increased from 0 ∘ to 1 ∘ , with an associated reduction in rolling force. Increasing WRS value from 0 to 8 mm improves the strip profile as well but not as significantly as when WRC angle is increased. No significant improvement was found in strip shape when the strip width was increased. At higher reduction, the strip shape was improved; a decrease in the rolling force was also observed. A higher speed ratio was found to be effective only at a higher WRC angle. The effect of lubrication on the strip profile was significant. Results indicate that an optimum combination of WRC, WRS, reduction, width, and speed ratio under lubricated conditions can ensure an improved exit strip profile, reduce rolling force, and obtain a better quality strip.

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“…But it should be pointed out that the shear stress on vertical sides of each slab is not considered by most of the above mentioned researchers that may make errors larger than acceptable limits for rolling pressure. 6) As it is recorded in M. Salimi's paper 7) and S. H. Zhang's, 8) the vertical shear stress plays a vital part in asymmetrical rolling, thus obtaining an analytical solution which accounts for the shear stress on vertical sides of each slab and can accurately calculate all the parameters like rolling force, torque, neutral points and bonding point as well as the clad thickness ratio during the rolling process is necessary.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Asymmetrical Rolling of Unbonded Clad Sheet by Slab Method Considering Vertical Shear Stress

2015

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A novel analytical approach for asymmetrical rolling of two unbonded clad sheet layers is creatively proposed to calculate the rolling force and torque. In this new approach, the vertical stresses which make calculation results be agree better with results measured in experiments are first applied in clad sheet asymmetrical rolling process. During varying of different roll speeds, roll radii and yield stress ratio of the two materials as well as different friction coefficients, two neutral points and one bonding point are obtained, then the plastic deformation region is divided into four zones. The neutral points, the bonding point, distribution of the rolling stress, the horizontal stress of the whole clad sheet and clad thickness ratio at the exit can be calculated by the present solution easily and rapidly. In order to verify the accurateness of the new model, the results received have been compared with those calculated by other traditional models as well as measured in the experiments conducted by previous scholars where the effects of vertical shear stress were ignored. As it can be seen, the maximum of errors is less than 9.8%.

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Modified slab analysis of asymmetrical plate rolling

Cited by 76 publications

References 16 publications

Asymmetrical sheet rolling analysis and evaluation of developed curvature

Asymmetrical sheet rolling analysis and evaluation of developed curvature

Improving Thin Strip Profile Using Work Roll Cross and Work Roll Shifting Methods in Cold Strip Rolling

Analysis of Asymmetrical Rolling of Unbonded Clad Sheet by Slab Method Considering Vertical Shear Stress

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