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Research Papers: Other (Seals, Manufacturing)

A Model for Surface-Film Lubricated Cold Rolling Incorporating Interdependence of Mechanics, Heat Transfer, and Surface-Film Lubrication

[+] Author and Article Information
L. Chang

Department of Mechanical
and Nuclear Engineering,
The Pennsylvania State University,
University Park, PA 16802;
Department of Mechanical Engineering,
National Chung Cheng University,
Ming-Hsiung, Chia-Yi 621, Taiwan

Yeau-Ren Jeng

Department of Mechanical Engineering,
National Chung Cheng University,
Ming-Hsiung, Chia-Yi 621, Taiwan

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received January 10, 2018; final manuscript received June 17, 2018; published online July 24, 2018. Assoc. Editor: Stephen Boedo.

J. Tribol 141(1), 012202 (Jul 24, 2018) (10 pages) Paper No: TRIB-18-1017; doi: 10.1115/1.4040595 History: Received January 10, 2018; Revised June 17, 2018

This paper aims to establish a theoretical feasibility of metal cold rolling with only surface-film boundary lubrication. To this end, a mathematical model for surface-film lubricated cold rolling is developed. It is formulated to factor in the interdependence of mechanics, heat transfer, and surface-film lubrication with three submodels: the lubrication-friction model, the stress-deformation model, and the thermal model. Governing equations are obtained based on fundamental physics of the rolling process and tribochemistry of the surface-film lubrication. The equations are solved simultaneously with full numerical methods of solutions. Sample results are presented to evaluate the model and to show the theoretical potential of the surface-film lubrication for cold rolling. The model may be used as a theoretical tool to aid the research and development of surface-film lubrication technology for cold rolling. It may be further developed in conjunction with precision experiments.

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References

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Figures

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Fig. 1

Schematic of strip rolling [16]

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Fig. 2

The domain for the thermal model

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Fig. 3

Calculation flow chart

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Fig. 4

Calculation results with a rolling velocity of V=1.0 m/s (other parameters defined in Table 1)

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Fig. 5

Cross-strip temperature distributions for the problem of Fig. 4

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Fig. 6

Calculation results with a rolling velocity of V=5.0 m/s (other parameters defined in Table 1)

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Fig. 7

Cross-strip temperature distributions for the problem of Fig. 6

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Fig. 8

Calculation results with a rolling velocity of V=15.0m/s (other parameters defined in Table 1)

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Fig. 9

Cross-strip temperature distributions for the problem of Fig. 8

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Fig. 10

Maximum rolling velocity versus strip reduction ratio with μa=0.1, Ta=90 °C, μr=0.2, and Tr=200 °C (other parameters defined in Table 1)

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Fig. 11

Maximum rolling velocity versus strip reduction ratio without the reaction film

Tables

Errata

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