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Thermal shear behavior in deformation phase of axisymmetric upsetting

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Abstract

The generalized energy equation was investigated for an incompressible fluid film in homogeneous deformation phase of axisymmetric upsetting process with a perfectly plastic material. A reduced form of energy equation was used for the heat transfer problem of convection coupled with conduction mode in the lubricant film. The effect of convection denoted by Peclet number and the temperature difference between tool and workpiece was parametrically investigated on the temperature distribution and inhomogeneous shear motion in the film. The results of present model problem indicate that the localized thermal shear across the lubricant film depends mainly on the reduction in height and the degree of convection induced by sliding motion between tool and workpiece.

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Acknowledgments

This work was supported by Inha University Research Grant and by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (No. 2010- 0022439).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Inha University, 100 Inha-ro, Nam-Ku, Inchon, 402-751, Korea

    Beong Bok Hwang & Jeong Hoon Noh

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  1. Beong Bok Hwang
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  2. Jeong Hoon Noh
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Correspondence to Beong Bok Hwang.

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Recommended by Editor Chongdu Cho

Beong Bok Hwang received his B.S. degree in Mechanical Engineering from Inha University, Incheon, Korea, in 1981. He received his M.S. and then Ph.D. degrees from Univ. of Michigan, Ann Arbor and U.C. Berkeley in 1985 and 1991, respectively. Dr. Hwang is currently a Professor at the School of Mechanical Engineering at Inha University in Incheon, Korea. Dr. Hwang’s research interests include metal forming processes and lubrication.

Jeong Hoon Noh received his B.S. degree in Mechanical Engineering from Inha University, Incheon, Korea, in 2008. He received his M.E. degree from Inha University in 2010. Mr. Noh is currently a Ph.D. candidate at the Department of Mechanical Engineering at Inha University in Incheon, Korea.

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Hwang, B.B., Noh, J.H. Thermal shear behavior in deformation phase of axisymmetric upsetting. J Mech Sci Technol 33, 5851–5860 (2019). https://doi.org/10.1007/s12206-019-1015-5

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  • DOI: https://doi.org/10.1007/s12206-019-1015-5

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