Patent ID: 8621906
Filing Date: 2014-01-07
Classification: B21B

Abstract:
1. A rolling mill for flat products, the rolling mill comprising: an upper work roll and a lower work roll, the upper work roll and the lower work roll driven by electric motors, and each having an axial center; an upper backup roll and a lower backup roll, the upper backup roll contacting the upper work roll, and the lower backup roll contacting the lower work roll, the upper and lower backup rolls supporting a rolling reaction force applied to the upper and lower work rolls, the axial centers of said work rolls offset in a rolling direction from the axial centers of said backup rolls; devices configured to apply external forces in a substantially horizontal direction to barrels or shafts of the upper and lower work rolls, at least one device positioned at each of a work side and a drive side of the upper and lower work rolls; wherein, from at least one of an entrance side or an exit side of the rolling mill, the external forces applied to the work rolls are supported through work roll chocks by project blocks of a rolling mill housing or work roll chock support members connected to backup roll chocks; and a value of a distance between a work roll axial center position and a backup roll axial center position in a rolling direction divided by the sum of the work roll radius and the backup roll radius is no more than 0.0025 for both the upper and lower rolls.