Rolling Force Prediction of Hot Strip based on Combined Friction

Rolling force of hot strip was predicted in which slipping and sticking friction were adopted on the contact arc between work roll and hot strip. Karman equation was applied to slipping friction and Orowan equation was applied to sticking friction. Predicted rolling forces of hot strip agreed with measured ones from a seven-stand hot strip mill. Friction stress distributions of one classical hot rolled strip on contact arc were analysed at each pass. From pass 1 to 3, sticking friction dominated while from pass 4 to 7 slipping and sticking friction coexisted. It proved that the applicability and superiority of rolling force model based on combined friction for rolling force prediction of hot strip.

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