A New Model for the Prediction of the Dog-bone Shape in Steel Mills

Yun, Dong Jin; Lee, Donghun; Kim, Jaeboo; Hwang, Soonkyu

doi:10.2355/isijinternational.52.1109

Cited by 32 publications

(30 citation statements)

References 7 publications

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“…Scholars have performed a significant amount of experimental and theoretical analyses on the metal transverse flow. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] At present, there are three general methods for analyzing the metal transverse flow: the three-dimensional difference method, 1,2) the finite element method [3][4][5][6] and the energy method. [7][8][9][10][11][12] One of the most widely used is the energy method, which has a high computational efficiency.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of the Metal Transverse Flow in the Roll Gap for Ultra-thin Strip Rolling Using the Energy Method

et al. 2018

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Strip shape control theory has been developed into a relatively accurate system. However, for ultra-thin strip rolling, strip shape control is still a bottleneck affecting production. The most important problem is that the transverse flow mechanism of the metal is not accurate. In this study, based on the theory of ultra-thin strip rolling proposed by Fleck, a new metal transverse displacement model is developed using the minimum energy principle. To verify the accuracy of the new model, experiments and finite element analyses were carried out. For the transverse flow of a thin strip, grids with a line thickness of 10 μm and clear boundaries were successfully manufactured on the strip surface using lithography. The transverse displacement for different working conditions was measured after rolling. For ultra-thin strip rolling, the distribution of the transverse flow is analyzed using FEA. Finally, a comparison shows that the calculations from the new model are more consistent with the measured value and the simulation results, verifying the accuracy of the new model.

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Section: Introductionmentioning

confidence: 99%

An Analysis of the Metal Transverse Flow in the Roll Gap for Ultra-thin Strip Rolling Using the Energy Method

et al. 2018

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“…Xiong [4] proposed shape model through physical simulation. Yun [5] presented a new model for predicting the dog-bone shape recently. Unfortunately, complete analytical dog-bone shape function hasn't been reported yet in edge rolling.…”

Section: Introductionmentioning

confidence: 99%

Study on dog-bone shape of edge rolling using cosine model

Liu¹,

Zhao²,

Zhang³

et al. 2015

Advances in Intelligent Systems Research

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Abstract. Edge rolling is a vital method for width control in rolling. The plastic deformation doesn't go deep into center of the slab, since the high ratio of width to thickness, and only occurs in the edge. Cosine dog-bone model is applied to describe dog-bone shape and used to establish a knematically admissible velocity field in edge rolling. Based on this model and field, the functional of the edge rolling power is obtained with the model using variable upper limit integration. Analytical solution of the dog-bone shape can be got through minimum energy principle. The calculated results of the shape parameters are compared with FEM simulation and traditional models.

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“…FE methods are preferred over analytical methods due to their higher possible accuracy and ability to include highly nonlinear material behavior [9]. However, FE models require high calculation times, making them inapplicable for on-line control schemes [3]. For on-line control, analytical models are the only feasible option.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 2. Dog-bone shaped slab resulting from edge rolling, left = initial slab cross-section, right = after edge rolling (adapted from [3])…”

Section: Introductionmentioning

confidence: 99%

“…To allow for the high deformations occurring in hot rough rolling, initial temperatures of typically 1200°C, well above the recrystallization temperature of plain carbon steel, are used [2]. The reversing mill stand is composed of an edge (vertical) rolling mill and a rough (horizontal) rolling mill [3], as illustrated in Figure 1. Edge rolling is applied to reduce the width of the slab, compensating for the width increase due to the Poisson effect in the subsequent horizontal rolling passes.…”

Section: Introductionmentioning

confidence: 99%

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3D finite element modeling of edge and width drop behavior in hot rolling mill

Bossche¹,

Bogaerts²,

Bellemans³

et al. 2017

SCAD

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Hot rough rolling is a conventional forming process in modern steelmaking practice in which high deformations are applied to a steel slab at high temperatures. Due to the sequence of edge rolling followed by rough rolling, so-called edge and width drop phenomena are observed at the head and tail of the slab. These unwanted effects govern a yield loss and need to be minimized as much as possible. By means of a finite element study this research aims to discover the main influencing parameters on the observed edge and width drop behavior. An overview and comparison of the relative contributions of several edge rolling settings are presented. The net edger roll opening is the most important influencing parameter on edge and width drop behavior. The effect of width and thickness of the slab on the edge drop is less strongly pronounced; only the thickness influences the width drop behavior.

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A New Model for the Prediction of the Dog-bone Shape in Steel Mills

Cited by 32 publications

References 7 publications

An Analysis of the Metal Transverse Flow in the Roll Gap for Ultra-thin Strip Rolling Using the Energy Method

An Analysis of the Metal Transverse Flow in the Roll Gap for Ultra-thin Strip Rolling Using the Energy Method

Study on dog-bone shape of edge rolling using cosine model

3D finite element modeling of edge and width drop behavior in hot rolling mill

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