Analysis of the rotational compression of a cylindrical billet in the transverse rolling process

A simple kinematically admissible velocity field is proposed for the plane-strain rotational compression of cylindrical billets in the transverse rolling process, by considering the tangential and normal velocity components of a wedge-shaped die. Based upon the proposed velocity field, the upper-bou...

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Bibliographic Details
Published in:Journal of materials processing technology 1990-08, Vol.22 (2), p.203-216
Main Authors: Cho, N.S., Na, K.H., Kim, J.H.
Format: Article
Language:English
Subjects:
cylinders
deformation processes
rolling
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Summary:A simple kinematically admissible velocity field is proposed for the plane-strain rotational compression of cylindrical billets in the transverse rolling process, by considering the tangential and normal velocity components of a wedge-shaped die. Based upon the proposed velocity field, the upper-bound on forming forces such as the rolling and the separating forces is determined by minimizing the total power consumption with respect to five free parameters. Confirmatory experiments have been carried out on pure lead at room temperature under appropriate conditions of constraint. Good agreement is found, between the theoretical results and the experimental measurements, for the forming forces and the contact length, from which it is concluded that the velocity field can be used effectively for the prediction of the forming forces and the contact length in the plane-strain rotational compression of cylindrical billets.
ISSN:0924-0136
DOI:10.1016/0924-0136(90)90041-R