Rev. Met. Paris
Volume 98, Number 5, May 2001Tribologie de la mise en forme des métaux
|Page(s)||435 - 442|
|Published online||25 October 2002|
Numerical modelling of lubricated foil rolling
A model of lubricated cold strip rolling is extended to the thin foil case. The model considers the evolution of asperity geometry and lubricant pressure through the bite. Friction between the roll and the asperities on the strip is modelled using the Coulomb and Tresca friction factor approaches. The shear stress in the Coulomb friction model is limited to the shear yield stress of the strip. A novel modification to these standard friction laws is used to mimic slipping friction in the reduction regions and sticking friction in a central neutral zone. The variation of rolling load, lubricant film thickness and asperity contact area with rolling speed is examined, for conditions typical of rolling aluminium foil from a thickness of 50 to 25 μm.
© La Revue de Métallurgie, 2001
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