Roller leveler and method for operating same

Abstract

The invention relates to a roller leveler ( 1 ) having a set of upper and lower flattening rollers ( 2 ), wherein each flattening roller ( 2 ) is provided with a rotary drive ( 3 ) actuated by leveler control ( 4 ) for rotating the flattening roller ( 2 ) to advance a to-be-flattened metallic flat material in a forward direction (F) and, thereby, flatten the flat, metallic material. To achieve an improved and optimal flattening result, the invention proposes that each flattening roller ( 2 ) has a first rotary drive (L 1 , L 2 . . . L n ) for driving one axial end of the flattening roller ( 2 ), and a second rotary drive (R 1 , R 2 . . . R n ) for driving one axial end of the flattening roller ( 2 ) and a second rotary drive (R 1 , R 2 . . . R n ) for driving the other end of the flattening roller, wherein the leveler controller ( 4 ) is designed to apply a parameter determining the direction of rotation of the flattening roller ( 2 ) to the first and second rotary drives (L 1 , L 2 . . . L n , R 1 , R 2 . . . R n ) individually based on a pre-set value. The invention also relates to a method of operating a roller leveler of this kind.

1 . Roller leveler, comprising a set of upper and lower flattening rollers ( 2 ), wherein each flattening roller ( 2 ) is provided with a rotary drive ( 3 ) actuated by leveler control ( 4 ) for rotating the flattening roller ( 2 ) to advance a to-be-flattened metallic flat material in a forward direction (F) and, thereby, flatten the same,
 characterized in that   each flattening roller ( 2 ) has a first rotary drive (L 1 , L 2  . . . L n ) for driving one axial end of the flattening roller ( 2 ), and a second rotary drive (R 1 , R 2  . . . R n ) for driving another axial end of the flattening roller ( 2 ), wherein, the leveler control ( 4 ) is designed to control a respective first and second drive (L 1 , L 2  . . . L n , R 1 , R 2  . . . R n ) individually to impart thereto, in accordance with a pre-set value, a parameter that determines a rotational movement of the flattening roller ( 2 ).   
     
     
         2 . Roller leveler according to  claim 1 ,
 characterized in that   the leveler control ( 4 ) is connected with a set value transmitter ( 5 ) that transmits parameters of the rotational movement of the flattening rollers ( 2 ) to all of the rotary drives (L 1 , L 2  . . . L n , R 1 , R 2  . . . R n ).   
     
     
         3 . Roller leveler according to  claim 1 , characterized in that the leveler control ( 4 ) is so formed that a predetermined torque (Md) is imparted to the respective first and second rotary drives (L 1 , L 2  . . . L n , R 1 , R 2  . . . R n ). 
     
     
         4 . Roller leveler according to  claim 1 , characterized in that the leveler control ( 4 / is so formed that a predetermined rotational speed (n) is imparted to the respective first and second drives (L 1 , L 2  . . . L n , R 1 , R 2  . . . R n ). 
     
     
         5 . Roller leveler according to  claim 1 , characterized in that the leveler control ( 4 ) is formed to regulate parameters determining the rotational movement of the flattening rollers ( 2 ) in a closed circuit. 
     
     
         6 . Roller leveler according to  claim 5 , characterized in that the regions of the first and second drives (L 1 , L 2  . . . L n , R 1 , R 2  . . . R n ), sensors ( 6 ) for detecting of the torque (Md) and/or the rotational speed (n) are provide which communicates with the leveler control ( 4 ). 
     
     
         7 . Method of operating a roller leveler having a set of upper and lower flattening rollers ( 2 ), wherein each flattening roller ( 2 ) is provided with a rotary drive ( 3 ) actuated by leveler control ( 4 ) for rotating the flattening roller ( 2 ) to advance a to-be-flattened metallic flat material in a forward direction (F) and, thereby, flatten the same,
 characterized in that   each flattening roller ( 2 ) has a first rotary drive (L 1 , L 2  . . . L n ) for driving one axial end of the flattening roller ( 2 ), and a second rotary drive (R 1 , R 2  . . . R n ) for driving another axial end of the flattening roller ( 2 ), wherein, the leveler control ( 4 ) imparts to a respective first and second drive (L 1 , L 2  . . . L n , R 1 , R 2  . . . R n ) an individual value for at least one parameter that determines a rotational movement of the flattening roller ( 2 ).   
     
     
         8 . Method according to  claim 7 , characterized in that the leveler control ( 4 ) is operated alternatively in one of the following operational mode:
 a) Operating only the first rotary drive (L 1 , L 2  . . . L n ) of the flattening roller ( 2 );   b) Operating only the second rotary drive (R 1 , R 2  . . . R n ) of the flattening roller ( 2 );   c) Operating both the first rotary drive (L 1 , L 2  . . . L n ) and the second rotary drive (R 1 , R 2  . . . R n ) of the flattening roller ( 2 ).   
     
     
         9 . Method according to  claim 7  or  8 , characterized in that a set-value transmitter ( 5 ) supplies the leveler control ( 4 ) with a pre-set value for a parameter that determines a rotational movement of the flattening roller ( 2 ). 
     
     
         10 . Method according to  claim 9 , characterized in that the set-value transmitter ( 5 ) is connected with a module ( 7 ) in which a number of different flattening strategies is stored, wherein for each flattening strategy, a data set for the parameter determining rotational movement of the flattening roller ( 2 ) is available, and wherein the module ( 7 ) communicates, to the set-value transmitter ( 5 ), the data set according to a selected flattening strategy.