Patent ID: 7530250
Filing Date: 2009-05-12
Classification: B21D

Abstract:
1. A method for leveling a metal strip ( 1 ), which is conveyed through a leveling machine ( 2 ) in a direction of transport (R) and leveled in the process, where the metal strip ( 1 ) is acted upon in the leveling machine ( 2 ) by a leveling force (F) applied by a number of leveling rolls ( 3 ) in the direction (N) normal to the surface of the metal strip ( 1 ), where, before the metal strip ( 1 ) enters the leveling machine ( 2 ), its thickness (d) is determined, and the leveling rolls are adjusted (a) in the direction (N) normal to the surface of the metal strip ( 1 ) as a function of the determined thickness (d), where at the exit end ( 4 ) of the leveling machine ( 2 ) a load measurement is made to determine a bowing tendency and a deviation (x) of the leveled metal strip ( 1 ) from an ideal line in the direction (N) normal to the surface of the metal strip ( 1 ), and where the adjustment (a) of the leveling rolls ( 3 ) in the direction (N) normal to the surface of the metal strip ( 1 ) is carried out as a function of the bowing tendency and of the deviation (x) in such a way that the metal strip ( 1 ) is as flat as possible after the leveling operation, wherein the bowing tendency and the deviation (x) are determined by a load measurement.