Abstract
The cold rolling process is decisively influenced by the mechanisms of lubricant supply to the deformation zone. Rolling tests with thin aluminium sheets were performed based on a theoretical model of the hydrodynamic entrainment of lubricant. Aluminium was used as a model material for steel in order to get a soft rolling stock to enlarge the hydrodynamic effect. The rolling conditions were chosen so that changes in friction conditions could definitely be traced back to a hydrodynamic effect in the inlet zone. The changes in friction conditions were demonstrated by significant rolling parameters, dimensionless similarity numbers, and alterations of the surface structures of the rolled test sheets. The conclusions indicate some tribological problems in cold rolling.
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