Head and tail shape control in vertical-horizontal rolling process by FEM

Zang, Xin-liang; Li, Xuetong; Du, Feng

doi:10.1016/s1006-706x(10)60008-8

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…Using a full three-dimensional (3D) rigid-plastic FEM, Xiong et al [25,29] studied the non-steady states of a single V-H rolling pass in roughing trains of strip mills, focusing on material flow velocity, slab uneven shapes and power parameters. Using 3D rigid-plastic FEM, a simulation for the non-steady state of a V-H rolling in roughing trains of strip mills was studied by Zang et al [30] A SSC model was developed based on the simulated slab end shapes. Ruan et al simulated 320 V-H rolling processes by 3D rigid-plastic FEM, established a wide and heavy plate edging model with SSC with the aid of an artificial neural network [1,31].…”

Section: Introductionmentioning

confidence: 99%

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Uneven shapes formation mechanism of heavy plate during vertical rolling

Ruan¹,

Xiang

Guo³

et al. 2023

Preprint

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This paper clarified the formation mechanism of the uneven shapes of a wide and heavy plate during vertical rolling (edging). Coordinate movements of material from the plate length center were constrained by both the rolled part and the to-be-rolled part during the steady edging phase. Then the higher dog-bone height and the shorter dog-bone length were formed around plate length center part, comparing to dog-bone shapes formed at plate head and plate tail. During the plate head edging phase, the main plastic deformation zone extended from the roller-plate contact zone to the plate head. Only the to-be-rolled part constrained deformation of material from the main plastic deformation zone, so it was easier for material flew into its width direction as well as its length direction than it did during the steady edging phase. Coordinate movements of the rolled material led to the width shortage around the plate head zone and increased the plate head concave shape. During the plate tail edging phase, the main plastic deformation zone extended from the roller-plate contact zone to the plate tail. Deformation constrain from the to-be rolled part disappeared gradually while that from the rolled part worked through the plate tail edging. Material of the main deformation zone flew into its width direction as well as its length direction more easily than it did during the steady edging too. Coordinate movements of the to-be rolled material increased the plate tail concave shape. The research results provided deep understanding for SSC in plate/strip edging and guidelines to develop new methods for plate/strip plan view pattern control.

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Section: Introductionmentioning

confidence: 99%

“…The non-steady edging phases have been mainly investigated by FEM [21,22,25,[28][29][30]. For example, Yu et al [21,22] successfully simulated three passes of V-H rolling by explicit dynamic FEM and updating geometric method and illustrated the plate uneven shapes evolution during the three rolling passes.…”

Section: Introductionmentioning

confidence: 99%

Uneven shapes formation mechanism of heavy plate during vertical rolling

Ruan¹,

Xiang

Guo³

et al. 2023

Preprint

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“…Usually, this procedure relies on expert knowledge, heuristic methods, and methods that are based on neural networks . There are only a few approaches that compute SSC curves based on a finite element simulation model of the rolling process . However, none of those approaches uses a detailed simulation model that accounts for all important effects, for example, elasto‐viscoplastic material behavior or large deformation mechanics, and none of them uses a rigorous gradient‐based optimization algorithm to compute the SSC curves.…”

Section: Introductionmentioning

confidence: 99%

Model‐Based Optimization of Short Stroke Control in Roughing Mills

Werner

Kurz²,

Stingl

et al. 2017

steel research int.

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Automatic width control is one key issue in hot strip rolling and the main actuator for width control is the vertical draft (edging) applied to slabs in the roughing sequence. In order to compensate for the occurring strip necking, a variable edger gap is applied in the edging process. This paper introduces a comprehensive mathematical optimization approach for the fully automatic generation of the associated edger roll trajectories, which is based on a nonlinear dynamic simulation model for the material flow in the roughing mill. Due to the complexity of this simulation model, gradient-based methods are applied to solve the resulting optimization problem in reasonable time. Hence, derivatives of cost functional and constraints must be provided, which entails computing sensitivity information from the underlying simulation model. Finally, numerical results for real-world examples are discussed to illustrate the capability of the presented approach. In particular, this paper examines the influence of characteristic parameters such as the slab width or the maximum edger screw in velocity onto the optimization results.[ Ã ] Dr.

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“…The slab deformation behaviours have been mainly investigated by industrial tests, 4,5 laboratory experiments [6][7][8][9][10][11] and finite element (FE) simulations. [12][13][14][15][16][17][18][19][20] Okado et al 6 simulated slab deformation during vertical rolling at a laboratory mill and formulated the dog bone shapes by regression analysis of the experiment results. According to the regression analysis of measured values from a production mill, formulae for strip width prediction in V-H rolling were derived by Shibahara et al 4 .…”

Section: Introductionmentioning

confidence: 99%

“…11,21 Finite element simulation of V-H rolling focused on the cross-section shape, the temperature distribution and the material flow of the rolled strips and the separating rolling force. [15][16][17]19 The slab deformation behaviours during strip V-H rolling were also comparatively studied with the sizing press by FE simulations. 18,20 Vertical-horizontal rolling had a great success in decreasing the number of necessary slab widths and increasing the strip yield.…”

Section: Introductionmentioning

confidence: 99%

Finite element simulation based plate edging model for plan view pattern control during wide and heavy plate rolling

Ruan

Zhang

Wang

et al. 2015

Ironmaking & Steelmaking

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From a new viewpoint to improve plate plan view pattern during hot rolling, a plate edging process was proposed to roll back only the plate width spread of conventional rolling in this paper. Using commercial finite element (FE) analysis software DEFORM-3D, a three-dimensional rigid plastic FE model for vertical-horizontal (V-H) hot rolling was developed on the basis of a 5 m wide and heavy plate mill. Three hundred and twenty kinds of different V-H rolling processes were simulated by the FE model. Basing on the simulation results, the formation laws of dog bone shape during the vertical rolling and the width spread behaviours during the horizontal rolling were clarified. A plate edging model predicting the plate edging efficiency was established with the aid of an artificial neural network. The plate edging efficiency predicted by this plate edging model agreed well with those predicted by the existing strip edging models when the slab width/thickness ratio was small, which confirmed the validity of the plate edging model. The plate edging model expanded its application scope into the wide and heavy plate hot rolling.

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Head and tail shape control in vertical-horizontal rolling process by FEM

Cited by 7 publications

References 6 publications

Uneven shapes formation mechanism of heavy plate during vertical rolling

Uneven shapes formation mechanism of heavy plate during vertical rolling

Model‐Based Optimization of Short Stroke Control in Roughing Mills

Finite element simulation based plate edging model for plan view pattern control during wide and heavy plate rolling

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