Abstract

A procedure is proposed for the calculation of the energy-force parameters of pinch-pass mills; it does not use the hypothesis of constant instantaneous volumes, which is employed in the computation of most plastic-deformation processes. Elastic regions occupy the major portion of the deformation zone of a strip subjected to skin rolling; therefore, a static friction model is taken as a model for contact friction during skin rolling. The strip speed is assumed to be equal to the peripheral roll velocity. The reliability of the new procedure is supported by the comparison of the calculated and actual skin-rolling forces and powers performed on a working mill. The possibility of a significant decrease in the specific quantity of metal per work stand and in the pinch-pass-mill engine power is grounded.

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