Numerical analysis of the strip crown inheritance in tandem cold rolling by a novel 3D multi-stand FE model

Li, Lianjie; Xie, Haibo; Liu, Tianwu; Huo, Mingshuai; Li, Xingsheng; Liu, Xu; Wang, Enrui; Li, Jianxin; Liu, Hongqiang; Sun, Laixi; Jiang, Zhengyi

doi:10.1007/s00170-022-08997-5

Cited by 13 publications

(12 citation statements)

References 27 publications

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“…Due to the model reduction based on symmetry and negligible temperature gradients in rolling direction, the model does not distinguish whether the gradual thickness reduction is caused by a back‐and‐forth movement of the plate in a reversing mill stand or by a single pass through several mill stands arranged one behind the other in a tandem stand. [ 28 ] Usually, however, a reversing stand is used to perform this process.…”

Section: Modular Modeling Strategy Yields a Digital Shadowmentioning

confidence: 99%

Toward a 2D/3D Finite‐Element–Based Digital Shadow for the Approximation of Metrologically Inaccessible Dynamic Fields of State Variables during Heavy Plate Rolling

Nemetz

Parteder

Reimer

et al. 2023

steel research int.

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Heavy plates are products of global economic relevance. Due to the high requirements for this semifinished product, the trend in heavy plate processing is toward providing ever higher quality steels that, for instance, combine a predefined yield point, good weldability, and, at the same time, predefined toughness properties. Unprecedented quality requirements in steel processing can only be met if technologically relevant parameters, such as temperature, are guaranteed to be kept within a narrow tolerance range during the hotrolling process, one of the most decisive steps within the production chain for heavy plates. Within the heavy plate hot-rolling process, often performed in a reversing four-high mill stand consisting of a pair of work rolls and a pair of backup rolls, various production steps like rolling passes, descaling sequences, and cooling periods, determine the plate's temperature evolution. [1] In parallel, temperature evolution affects the microstructure and, thus, associated physical properties of the final product, such as hardness and toughness. [2] It is, therefore, of utmost importance to consider the evolution of the temperature field inside the heavy plate as a specification when planning the entire process that reaches from the slab's exit from the furnace to the last pass.All in all, the production steps of hot rolling govern the plate temperature in two fundamentally different scenarios: sufficiently far from the roll bite, the plate temperature decreases moderately through air cooling or abruptly on the surface of the plate through contact with water which is applied locally in the form of high-pressure jets provided by a water descaling unit. Inside the roll bite, the plastic deformation is accompanied by heat generation inside the plate, and simultaneously the contacting cooler work rolls reduce the temperature at its surfaces. These and other thermomechanical effects can hardly be measured, which is the reason why models are utilized for better insight. As digital transformation has become a significant innovation driver, a digital representation of the process in the form of an integrated digital model, digital shadow, or digital twin has to cover these potentially interfering thermomechanical aspects. [3,4] Modeling and simulation have been integral to the research and development of rolling processes for decades. An incomplete but representative selection of milestones, in chronological order, is intended to outline the road to comprehensive modeling approaches available today: The journey started with basic

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Section: Modular Modeling Strategy Yields a Digital Shadowmentioning

confidence: 99%

Toward a 2D/3D Finite‐Element–Based Digital Shadow for the Approximation of Metrologically Inaccessible Dynamic Fields of State Variables during Heavy Plate Rolling

Nemetz

Parteder

Reimer

et al. 2023

steel research int.

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show abstract

“…Furthermore, the five distinct FE models were calculated sequentially. The detailed modelling process and roll size parameters are presented in our previous studies [26,27].…”

Section: Modelling Techniquesmentioning

confidence: 99%

“…The WR, IMR and BR were made of Cr5 forged steel. The strip and rolls were characterised as elastic-plastic body and elastic bodies, respectively, and their physical properties are summarised in [27]. Taking into account the work hardening effect, rolling-tension tests were conducted to determine the strip's static deformation resistance, which can be expressed by Eq.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…However, the simulation was limited to the first two stands. In our previous studies [26,27], a novel 3D elastic-plastic multi-stand FE model has been proposed for the TCR, in which the strip crown and equivalent plastic strain were transferred from one stand to the neighbouring stand, thus making it available for studying the effects of the IRS on the strip shape at each pass during the TCR.…”

Section: Introductionmentioning

confidence: 99%

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Influence of intermediate roll shifting on strip shape in a CVC-6 tandem cold mill based on a 3D multi-stand FE model

Xie

Zhang

et al. 2022

Int J Adv Manuf Technol

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Intermediate roll shifting (IRS) is widely used for improving the strip shape in the six-high tandem cold mill, but most related studies are limited to a single stand. To fill the knowledge gap, a three-dimensional (3D) multi-stand elastic–plastic finite element (FE) model was developed for a continuously variable crown (CVC)-6 tandem cold mill using data transfer, which was then validated by industrial experimental results. Based on this FE model, the effects of the IRS on the strip crown, strip flatness, loaded roll gap profile and contact normal stress between rolls at each stand were quantitatively analysed. The results show that from Stand 1 (S1) to Stand 5 (S5), the regulation ability of the IRS on the strip crown shows a decreasing trend, which depends on the strip plastic rigidity; in contrast, the regulation ability on the quadratic flatness experiences an obvious increase from S1 to Stand 4 (S4), then a drop at S5, while the IRS exerts little effect on the quartic flatness and quartic crown of the loaded roll gap. Moreover, the most uniform distribution of contact normal stress emerges at different IRSs from S1 to S5. These findings can contribute to a better understanding of the role of the IRS in controlling the strip shape during tandem cold rolling (TCR).

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“…These are not new terms but meaning of those has changed over time while models and computers have developed. Individual phenomena regarding the steel rolling and metallurgy have been studied and theories developed over a century [1][2][3][4][5][6][7][8]. These theories have been coupled using different modelling methods to understand mutual effect of certain phenomena into properties of steel.…”

Section: Introductionmentioning

confidence: 99%

Virtual rolling automation and setup calculations for six stands FEM finishing mill

Ilmola

Seppälä

Pohjonen

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Digitalization is becoming increasingly common in the steel industry. Formerly developed models of individual phenomenon or separate sub-processes are being further developed into wider complexes where multiple models are coupled together. Virtual rolling automation, which can be used to control a finite-element rolling model, is a new element in these complexes. The automation enables to model the variations caused by the process adjustment. It must be taken in the account that neither the model nor the industrial process are ideal, but there are limitations in the attainable accuracy in both cases. Inclusion of the new automation control in the FE-model introduces new requirements: the setup calculations for all six rolling stands and the automation logic adjustments must perform within the model. The focus of the current article is prediction of the roll force and the virtual rolling automation of six stand finishing mill.

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Numerical analysis of the strip crown inheritance in tandem cold rolling by a novel 3D multi-stand FE model

Cited by 13 publications

References 27 publications

Toward a 2D/3D Finite‐Element–Based Digital Shadow for the Approximation of Metrologically Inaccessible Dynamic Fields of State Variables during Heavy Plate Rolling

Toward a 2D/3D Finite‐Element–Based Digital Shadow for the Approximation of Metrologically Inaccessible Dynamic Fields of State Variables during Heavy Plate Rolling

Influence of intermediate roll shifting on strip shape in a CVC-6 tandem cold mill based on a 3D multi-stand FE model

Virtual rolling automation and setup calculations for six stands FEM finishing mill

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