In the ring-rolling process most of the required forming energy is transferred from the roll into the deforming region by the aid of friction between the roll surface and the ring. In this paper a concept of “equivalent” coefficient of friction (μeq) is proposed, which is the ratio of frictional force of the driven roll to pressing load of the pressure roll. Considering the ring geometry and the related kinematics, the relationship between equivalent coefficient of friction and process parameters is derived. The upper-bound torque is also found based on the geometrical simplifications, and the roll of μeq for the upper-bound solution is investigated. The effects of various process parameters on equivalent coefficient of friction in ring rolling are then discussed.
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August 1987
This article was originally published in
Journal of Engineering for Industry
Research Papers
An Investigation into the Relationship between Torque and Load in Ring Rolling
D. Y. Yang,
D. Y. Yang
Department of Production Engineering, Korea Advanced Institute of Science and Technology, Seoul, Korea
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J. S. Ryoo
J. S. Ryoo
Department of Production Engineering, Korea Advanced Institute of Science and Technology, Seoul, Korea
Search for other works by this author on:
D. Y. Yang
Department of Production Engineering, Korea Advanced Institute of Science and Technology, Seoul, Korea
J. S. Ryoo
Department of Production Engineering, Korea Advanced Institute of Science and Technology, Seoul, Korea
J. Eng. Ind. Aug 1987, 109(3): 190-196
Published Online: August 1, 1987
Article history
Received:
August 7, 1986
Online:
July 30, 2009
Citation
Yang, D. Y., and Ryoo, J. S. (August 1, 1987). "An Investigation into the Relationship between Torque and Load in Ring Rolling." ASME. J. Eng. Ind. August 1987; 109(3): 190–196. https://doi.org/10.1115/1.3187117
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