1. The patented technology of sub-roller drive is adopted to eliminate the mechanical interference and negative torque phenomenon between the rollers and various problems arising therefrom, prolong the life of the work roll and protect the surface of the workpiece.
2. The sub-roller drive enables the medium and heavy plates to also realize the linear decompression leveling method, which conforms to the steel plate leveling law and achieves the required leveling accuracy. Due to the gradual decrease in the amount of bending, compared with the large-deformation leveling method of parallel bending, the total deformation of the material is reduced, and the total leveling force and total power consumption are reduced, which saves energy.