Multistage rolling mill with flatness control function
AssigneeIshikawajima-Harima Jukogyo Kabushiki Kaisha
InventorsToshio Iwanami, Hajime Watanabe
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Abstract
The present invention considerably improves the rolling mill in the flatness control function, by arranging either of a pair of upper and lower work rolls as a small-diameter roll, offsetting the small-diameter work roll by a required distance in the rolling direction, providing an intermediate roll between the small-diameter work roll and a backup roll, letting a vertical bending force act on the upper and lower work rolls and the intermediate roll, and letting a horizontal bending force act on the small-diameter work roll.
Claims4
A multistage rolling mill with flatness control function comprising upper and lower work rolls, one of said work rolls being substantially smaller in diameter than the other work roll, upper and lower back-up rolls, said work rolls being driven, whereby rolling at different speeds is effected, said work roll of smaller diameter being offset in a rolling line with respect to axes of the upper and lower back-up rolls, an intermediate roll between said work roll of smaller diameter and the back-up roll of said work roll of small diameter, a vertical bending device provided for each of said work rolls and said intermediate roll, and a horizontal bending device for bending said work roll of smaller diameter horizontally;
- said other work roll and said intermediate roll being offset in the rolling line with respect to the axes of the upper and lower back-up rolls with said small diameter work roll, said intermediate roll and said back-up roll associated with said small diameter work roll all being arranged to have axes of rotation in a common plane.
Dependencies are inferred from the claim text.