Evolution on Topography of Textured Work Rolls and Steel Strips during Cold Rolling and Temper Rolling

Xia, Chunyu; Zhang, Xin; Zhang, Jie; Li, Hongbo; She, Jia

doi:10.1002/srin.201600469

Cited by 12 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note also that the height of the deviation peaks is attenuated in the current pass. References [8,19,33,34] show similarly that roughness of the strip decreases after a rolling pass employing smooth rolls. From Fig.…”

Section: Work Roll Bending As Corrective Mechanismmentioning

confidence: 93%

Influence of work-roll grinding error and high-fidelity corrective grinding in cold sheet rolling

Patel

Malik

Zhang

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

High-fidelity flatness defects in cold-rolled strip and sheet, arising from highly-localized thickness strain variations, present an ongoing challenge to the metals industry. A primary cause of such defects, based on rolling practice, but for which the effects have not been rigorously investigated, is the transfer of localized work-roll diameter deviations due to roll grinding error. This study addresses high-fidelity work-roll diameter deviation transfer in the cold rolling of stainless steel, aluminum, and copper. Parametric studies are performed on a 4-high mill to examine the influences of roll diameter, reduction, strip width, and material on the transfer of high-fidelity work roll diameter deviations. Studies are conducted using an efficient 3D roll-stack model that predicts strip thickness profile deviations via the simplified-mixed finite element method. Reduction deviations on the outgoing strip, which correlate to strip flatness/shape defects, are quantified and analyzed to understand the transfer characteristics of work-roll grinding deviations relative to perfectly ground (smooth) work rolls. The results reveal that high-fidelity transfer depends not only on roll grinding deviation amplitudes and mill loading, but also on the specific locations of deviations along the roll face length due to 3D bulk roll-stack deformations as well as effective stiffness ratio between the work roll and the strip. Concluding the study is a novel approach to identify customized work roll grinding profiles tailored specifically to eliminate pre-existing high-fidelity strip flatness defect patterns, wherein "corrective" high-fidelity roll diameter profiles account for the predicted 3D mill deflections, contact force distributions, and coupled micro/macro scale deformation mechanics.

show abstract

Section: Work Roll Bending As Corrective Mechanismmentioning

confidence: 93%

Influence of work-roll grinding error and high-fidelity corrective grinding in cold sheet rolling

Patel

Malik

Zhang

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Temper rolling (skin-pass rolling) is the rolling process used in the final forming stage of automotive sheets [4]. In the temper rolling process, the surface roughness profile is transferred to the materials through rolls with a special texture [5]. Thanks to the surface roughness profile obtained, the forming ability and paint adhesion of sheet materials are improved.…”

Section: Introductionmentioning

confidence: 99%

Effect of Temper Rolling Reduction Ratio on Microhardness and Microstructure of DC04 Grade Sheet Material

Özakın

Kurgan

2022

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

View full text Add to dashboard Cite

With temper rolling, which is the final stage of the cold rolling manufacturing process, to the surface of sheet metal materials is transferred roughness with specially roughened rolls. In this study, microhardness and microstructural evolution occurring in the section along the thickness of DC04 grade sheet materials temper rolled with various reduction ratios were investigated. As a result, it was concluded that the microhardness distribution taken from the section along the thickness increases with the increase of reduction ratio and the microhardness distribution from the surface to the center in the section decreases. In the temper rolling process with a reduction ratio of 250 µm and 500 µm an increase of approximately 5% and 15% has occurred, respectively compared to before the temper rolling process. It was also concluded that with the increase in reduction ratio, the grains in the section along the thickness elongated and thinned on the surface and this change in the center compared to the regions close to the surface was less.

show abstract

“…Some of them are rolling speed, elongation, reduction ratio, properties of the material, roll parameters (roughness, radius, material, roughening method), lubrication conditions, etc. (Wu et al , 2019; Xia et al , 2017; Rodriguez-Vidal et al , 2020; Kijima, 2014; Mekicha et al , 2020; Nagase et al , 2009a; Köhler et al , 2016). Dick and Lenard (2005) concluded that as the rolling speed increased, loads and a forward slip would increase, thereby increasing the surface roughness of the sheets and approaching the value of the roll roughness.…”

Section: Introductionmentioning

confidence: 99%

Effect of material thickness and reduction ratio on roughness transfer in skin-pass rolling to DC04 grade sheet materials

Özakın

Çolak

Kurgan

2021

ILT

View full text Add to dashboard Cite

Purpose The last stage of the cold rolling process is skin-pass rolling and one of its most significant goals is to obtain appropriate topography on the surface of the sheet steel used extensively such as in automotive industry. The purpose of this paper is to investigate the effect of thickness change and various reduction ratios on roughness transfer of DC04 grade sheet material. Design/methodology/approach DC04 grade sheet materials with different reduction ratios and several thicknesses were subjected to skin-pass rolling process in the rolling equipment with a two-high roll. Some roughness parameters were determined as a result of roughness measurements from the surfaces of roughened sheet materials. Findings While the roughness transfer is higher in 1-mm thick material in reduction ratios up to 430 micrometers; in reduction ratios above 430 micrometers, it is higher for 1.5-mm thick materials. As the reduction ratio increases in DC04 grade sheet materials, the homogeneity of the roughness distribution in 1-mm thickness sheet material deteriorates, while the roughness distribution in 1.5-mm thickness sheet material is more homogeneous. Originality/value This paper demonstrates how material thickness and reduction ratio affect the roughness transfer in skin-pass rolling. The results obtained can be used by optimizing in manufacturing processes.

show abstract

Evolution on Topography of Textured Work Rolls and Steel Strips during Cold Rolling and Temper Rolling

Cited by 12 publications

References 21 publications

Influence of work-roll grinding error and high-fidelity corrective grinding in cold sheet rolling

Influence of work-roll grinding error and high-fidelity corrective grinding in cold sheet rolling

Effect of Temper Rolling Reduction Ratio on Microhardness and Microstructure of DC04 Grade Sheet Material

Effect of material thickness and reduction ratio on roughness transfer in skin-pass rolling to DC04 grade sheet materials

Contact Info

Product

Resources

About