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| Optimization for Roll Profiles of HC-Mill |
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Abstract By the technique of intermediate roll shifting, the HC-mill’s gap stiffness and the shape control ability is improved significantly. But the peak of contact pressure between rolls forms when the intermediate roll shifts, which leads local wear of rolls and quality defects of strip. A mathematical model of flatness and profile of strip is established. The influence of roll’s profile on the contact pressure between rolls is studied. The work and back roll’s profile of 1220HC mill are optimized. Theoretical calculations show that the peak value of contact pressure between intermediate roll and back roll can be decreased by 20％, and the peak value of contact pressure between intermediate roll and work roll can be decreased by 10％. The industrial experiments show that the local wear of rolls and quality defects of strip can be avoided by such an improvement.
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Received: 04 March 2009
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2009, Vol. 44 
