Simulation of deformation and temperature in multi-pass H-shape rolling

Komori, Kazutake

doi:10.1016/s0924-0136(00)00537-9

Cited by 33 publications

(15 citation statements)

References 6 publications

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“…In order to get the distribution law of the transverse temperature and improve strip quality, research on transient temperature field in the rolling process has positive significance. From the first finishing stand entry side to last finishing stand exit side, strip temperature changes are very complex, including heat conduction between strip and work roll, heat convection between strip surface and cooling water, heat convection between strip surface and ambient air, heat from plastic deformation, friction heat and so on [4][5][6][7][8]. Based on the previous research of rolling temperature field, this paper established a transient temperature field model which considered calculation efficiency and precision, and took into account various kinds of heat transfer phenomenon by using alternating difference method.…”

Section: Introductionmentioning

confidence: 99%

Influence of Strip Transverse Temperature Deviation in Hot Rolling Based on Two Dimension Alternating Difference

Shao¹,

Qiu²,

Huang³

et al. 2015

IJHT

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According to energy conservation and finite difference method, strip transient temperature model was established with high operation speed and good operation precision, which used discretization mesh in strip cross section, analyzed energy conversion of each control volume, transformed differential equation into difference equation, built various node difference equations, used two dimension alternating difference for equations solution. Based on the transient temperature field model, influence rule of strip transverse temperature was analyzed with different strip thickness, width and slab initial temperature difference. The research results show that strip transverse temperature in finishing stand is direct proportion to strip thickness, width and slab initial temperature difference. The results also provide theoretical support for the transverse temperature difference improvement in hot rolling.

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Section: Introductionmentioning

confidence: 99%

Influence of Strip Transverse Temperature Deviation in Hot Rolling Based on Two Dimension Alternating Difference

Shao¹,

Qiu²,

Huang³

et al. 2015

IJHT

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“…[9][10][11] Then the theory of universal rolling method has been developed and improved. Although the universal rolling method has been also applied in heavy rail rolling for 30 years, there are few theoretical research about the rail rolling by universal mills.…”

Section: Introductionmentioning

confidence: 99%

The Theoretical and Experimental Research on the Forward Slip Coefficient in Rail Universal Rolling

Dong

Zhang

Song³

2009

ISIJ Int.

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In rail universal rolling, the forward slip coefficient is one of the most important parameters. For simplifying the analytic model, the vertical roll with box pass has been simplified as an equivalent flat roll firstly. Then the equation of neutral line and the area of forward slip zone on the flank of horizontal roll have been derived. Furthermore, the horizontal resultant force acting on the rolled workpiece has been obtained and the forward slip coefficient of rail universal rolling has been proposed. For verifying the theoretical model, the universal rolling process of 60 kg /m heavy rail and 18 kg /m light rail have been simulated by the RigidPlastic FEM software DEFORM-3D V5.0, and the universal rolling experiments of 18 kg/m light rail has been accomplished in the Yanshan University Rolling Laboratory. Moreover, the theoretical results and numerical simulation results of forward slip coefficient are in agreement with the experimental data basically. So, this theoretical model can be applied in rail universal rolling. (3) where H f is the height of box pass, W t0 is the width of incoming workpiece, W t1 is the width of outgoing workpiece, B 0 is the minimum width of box pass, B f is the maximum width of the box pass. it can be shown as (11) where b t is the spread coefficient of the top of rail, c m is the influence factor of the material on the spread (Table 1), c wt is the deformation conformity factor between the web of rail and the top of rail, w f is the proportion between the volume of metal flowing to the cross section and the total volume of metal flow, G vt is the roll gap, R vt is the maximum radius of vertical roll rolling the top of rail, j is the friction factor of box pass.The width of the top of rail at the exit section W b1 can be calculated by the modified S. Ekelund spread equation (15) where c wb is the deformation conformity factor between the web of rail and the top of rail, l b is the length of contact zone of the base of rail.In this paper, the critical point is defined as the point on the contact boundary at the exit section. It affects the contact status and the shape of the outgoing workpiece directly, so it is indispensable for determining the mean roll radius.At the exit cross-section, the critical point (C y , C z ) can be determined by the intersecting point between the stress free surface and the side wall of box pass. So the critical point (C y , C z ) can be obtained from the following equations: As can be seen in Fig. 2, the little round angle is neglected. Since the small amount of area is neglected, the area of available contact section (hatching zone) A h at the exit section can be determined by.

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“…The hot rolling processes were also solved by several scholars (Galantucci and Tricarico, 1999;Komori and Koumura, 2000). Most of the papers focused on the static finite element method coupled with thermo-mechanical analysis; the literature contains few studies of the dynamic finite element method coupled with thermal effect.…”

Section: Introductionmentioning

confidence: 99%

The coupled thermo-mechanical analysis in the upsetting process by the dynamic FEM

Wang

Chen

Wang

2008

Journal of Materials Processing Technology

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Simulation of deformation and temperature in multi-pass H-shape rolling

Cited by 33 publications

References 6 publications

Influence of Strip Transverse Temperature Deviation in Hot Rolling Based on Two Dimension Alternating Difference

Influence of Strip Transverse Temperature Deviation in Hot Rolling Based on Two Dimension Alternating Difference

The Theoretical and Experimental Research on the Forward Slip Coefficient in Rail Universal Rolling

The coupled thermo-mechanical analysis in the upsetting process by the dynamic FEM

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