Finite Element Analysis of Temperature and Crown of Rolls in Hot Strip Rolling

2009 ◽  
Vol 16-19 ◽  
pp. 575-579 ◽  
Author(s):  
Da Le Sun ◽  
Jian Guo Zhao ◽  
Liang Yu Chen
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Work Roll ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Element Analysis ◽  
Rolling Mills ◽  
Hot Strip ◽  
Thermal Crown ◽  
Work Rolls

In this paper a three-dimensional numerical computation on temperature and crown of rolls in hot strip rolling was evaluated based on finite element method and parallel computation technology with multiple CPUs. A comparison between calculated results and actual data collected from rolling mills was presented, which indicated the high accuracy of the model. The calculated results indicated that a significant impact in thin layer of work roll surface was brought by thermal load, while much weaker in the core. Furthermore, the temperature field and thermal crown of hot mill work rolls would reach a stabilized condition only when several rolling cycle be finished.

scholarly journals On the Evolution of Temperature and Combined Stress in a Work Roll under Cyclic Thermo-Mechanical Loadings during Hot Strip Rolling and Idling

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5054
Author(s):  
Kejun Hu ◽  
Qinghe Shi ◽  
Wenqin Han ◽  
Fuxian Zhu ◽  
Jufang Chen
Keyword(s):  
Thermal Stress ◽  
Hot Rolling ◽  
Work Roll ◽  
Rolling Process ◽  
Roll Surface ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Hot Strip ◽  
Calculation Results ◽  
Work Rolls

An accurate prediction of temperature and stress evolution in work rolls is crucial to assess the service life of the work roll. In this paper, a finite element method (FEM) model with a deformable work roll and a meshed, rigid body considering complex thermal boundary conditions over the roll surface is proposed to assess the temperature and the thermal stress in work rolls during hot rolling and subsequent idling. After that, work rolls affected by the combined action of temperature gradient and rolling pressure are investigated by taking account of the hot strip. The accuracy of the proposed model is verified through comparison with the calculation results obtained from the mathematical model. The results show that thermal stress is dominant in the bite region of work rolls during hot rolling. Afterwards, the heat treatment residual stresses which are related to thermal fatigue are simulated and introduced into the work roll as the initial stress to evaluate the redistribution under the thermal cyclic loads during the hot rolling process. Results show that the residual stress significantly changed near the roll surface.

Finite Element Analysis of Temperatures, Metal Flow, and Roll Pressure in Hot Strip Rolling

1993 ◽  
Vol 115 (3) ◽  
pp. 290-298 ◽  
Author(s):  
S. M. Hwang ◽  
M. S. Joun ◽  
Y. H. Kang
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Metal Flow ◽  
Flow Characteristics ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Element Analysis ◽  
Speed Reduction ◽  
Roll Pressure ◽  
Hot Strip

This paper presents a new approach for the analysis of hot strip rolling processes. The approach is based on the finite element method and capable of predicting velocity field in the strip, temperature field in the strip, temperature field in the roll, and roll pressure. Basic finite element formulations are described with emphasis on modeling roll pressure and friction at the roll-strip interface and on treating the numerical instability resulting from a standard Galerkin formulation. Comparison with the theoretical solutions found in the literature is made to evaluate the accuracy of the temperature solutions. An iterative scheme is developed for dealing with strong correlations between the metal flow characteristics and thermal behavior of the roll-strip system. A series of process simulations are carried out to investigate the effect of various process parameters including interface friction, interface heat transfer coefficient, roll speed, reduction in thickness, and spray zone. The results are shown and discussed.

Calculation Model for Thermal Crown of Work Roll in Hot Strip Rolling

2014 ◽  
Vol 926-930 ◽  
pp. 763-766 ◽  
Author(s):  
Zi Ying Liu ◽  
Yan Guang Sun ◽  
Xiang Rong Song
Keyword(s):  
Temperature Field ◽  
Surface Temperature ◽  
Work Roll ◽  
Calculation Model ◽  
Hot Strip Mill ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Strip Shape ◽  
Hot Strip ◽  
Thermal Crown

The finite difference method model of temperature field and thermal crown of work roll on hot strip mill was researched. The temperature field and thermal crown were calculated, surface temperature distribution and thermal deformation were both reduced from center to edge. The computed and measured roll surface temperature were comparatively in good agreement with each other, practical application results show that the model has high calculating speed, high precision and can meet the needs of the strip shape on-line process control.

X-ray thickness gauge for hot strip rolling mills

1948 ◽  
Vol 67 (5) ◽  
pp. 441-444 ◽  
Author(s):  
C. W. Clapp ◽  
R. V. Pohl
Keyword(s):  
Thickness Gauge ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Rolling Mills ◽  
X Ray ◽  
Hot Strip

Finite Element Analysis of Transient Thermal Problems of Work Rolls in Hot Rolling Process

1999 ◽  
Author(s):  
James D. Lee ◽  
Majid T. Manzari ◽  
Yin-Lin Shen ◽  
Wenjun Zeng
Keyword(s):  
Finite Element ◽  
Hot Rolling ◽  
Three Dimensional ◽  
Thermal Characteristics ◽  
Rolling Process ◽  
Thermal Problem ◽  
Element Analysis ◽  
Hot Rolling Process ◽  
Transient Thermal ◽  
Work Rolls

Abstract The three-dimensional transient thermal problem of work rolls in the entire hot rolling process has been formulated. It includes the time-varying boundary conditions specified at the roll surface taking the schedule of both rolling and idling cycles into consideration. The corresponding finite element equations are derived and solved by the Runge-Kutta-Verner method. The finite element solutions indicate that the temperature variations in the circumferential direction are overwhelming. Case studies unveil the thermal characteristics of the work rolls in various kinds of mill operations. Numerical results are presented and compared with Guo’s analytical solutions.

Finite Element Simulation and Analysis for the Working Process of Working-Roll of Carder

2013 ◽  
Vol 670 ◽  
pp. 76-79
Author(s):  
Bao Guo Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Radial Displacement ◽  
Three Dimensional ◽  
Work Roll ◽  
Middle Part ◽  
Working Process ◽  
Element Analysis ◽  
Analog Simulation ◽  
Roll Axis

The three-dimensional models of the Working-roll of Carder are founded by three-dimensional design software Solidworks and the working process of Working-rolls is simulated by finite element analysis software Cosmos, which obtain overall stress distribution for the Working-roll of Carder. The relations between the working-rolls with different thickness and different length of work roll axis and the stress, strain and radial displacement in the working process of working-rolls are attained by finite element analysis and the important factors of impact of work roll deformation are indicated by analog simulation. The results show that the maximum stress and maximum strain are occur in the place of roller connected with the axis rather than to appear in the middle part of roller and the radial displacement in the working process of working-rolls and the length of work roll axis are not directly relationship. The Finite element analysis results provide an important theoretical basis to design a reasonable the length of axis and the thickness of roller for the working-roll of carder.

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