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TECHNICAL PAPERS

A Finite Element Approach to Transient Thermal Analysis of Work Rolls in Rolling Process

[+] Author and Article Information
James D. Lee

Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052

Majid T. Manzari

Department of Civil and Environmental Engineering, The George Washington University, Washington, DC 20052

Yin-Lin Shen, Wenjun Zeng

Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052

J. Manuf. Sci. Eng 122(4), 706-716 (Jan 01, 2000) (11 pages) doi:10.1115/1.1287590 History: Received February 01, 1999; Revised January 01, 2000
Copyright © 2000 by ASME
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References

Figures

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The work roll is subject to four zones with various heating/cooling boundary conditions 5
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Variation of averaged surface temperature along the roll axis for the first five coils (a) BC-1 (b) BC-2 (c) BC-3
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Temperature distribution on the r-θ plane at the end of 5th coil (z̄=0) (a) 2D (b) 3D (BC-1) (c) 3D (BC-2) (d) 3D (BC-3)
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Temperature distribution on the r-θ plane at the end of 30thcoil: (a) At the end of rolling cycle (coarse mesh), (b) At the end of idling cycle (coarse mesh), (c) At the end of rolling cycle (fine mesh), (d) At the end of idling cycle (fine mesh)
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Variation of temperature in the radial direction for various coil: (a) at the end of rolling cycle, (b) at the end of idling cycle
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Variation of temperature as a function of time at various radial locations
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Variation of surface temperature in the circumferential direction (4 turns/rolling cycle): (a) at the end of the first rolling cycle, (b) at the end of the first idling cycle, (c) at the end of the 30th rolling cycle, (d) at the end of the 30th idling cycle,
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Variation of bulk temperature for different specific heat values: 1, γ=γ*/2; 2, γ=γ*; 3, γ=2γ*
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Variation of temperature for different angular velocities keeping ω̄τr constant: (a) averaged surface temperature, (b) bulk temperature. 1, ω̄=ω̄*/4,τr=0.0016,τi=0.0006; 2, ω̄=ω̄*r=0.0004,τi=0.0006; 3, ω̄=4ω̄*r=0.0001,τi=0.0006.
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Variation of surface temperature in the circumferential direction (600 turns/rolling cycle): (a) at the end of the 1st coil, (b) at the end of the 15th coil. 1, at the end of the rolling cycle; 2, at the end of the idling cycle.
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Variation of surface temperature for different convective heat transfer coefficient: 1, h1=7200(W/m2/°C); 2, h1=7600(W/m2/°C); 3, h1=8000(W/m2/°C). (a) In the circumferential direction (at the end of the 30th rolling cycle), (b) averaged surface temperature (for 30 cycles).
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The effect of specific heat for continuous rolling: (a) averaged surface temperature, (b) bulk temperature. 1, γ=γ*/2; 2, γ=γ*; 3, γ=2γ*.
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An element in global and local coordinates

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