Multiple-roll rolling mill for strip material

Abstract

The present invention relates to a cluster mill for strip material, having working rolls ( 1, 2 ), which are supported, via possibly existing intermediate rolls ( 4, 5 ), on backup rolls ( 6, 7, 8, 9-16 b ), which are each rotatably mounted jointly on a support axle ( 17, 18, 19, 20 ), divided into at least three longitudinal sections (L 1 , L 2 , L 3 ), and having at least one adjustment device, which is assigned to at least one of the support axles ( 18 ) and includes actuator drives ( 35, 36, 37 ), each one of which is assigned to one of the longitudinal sections (L 1 , L 2 , L 3 ) of the support axle ( 18 ) at each case and, via a group (G 1 , G 2 , G 3 ) of actuators ( 24, 25, 26; 27, 28; 29, 30, 31 ), which are coupled to one another via a coupling element ( 32, 33, 34 ) in regard to their movement in relation to the support axle ( 18 ), apply a force, directed transversely to the longitudinal direction of the support axle ( 18 ), to the respective longitudinal section (L 1 , L 2 , L 3 ) to correct the roll gap ( 3 ) between the working rolls ( 1, 2 ).

1 . A cluster mill for strip material having work rolls ( 1 ,  2 ), which are supported, via possibly existing intermediate rolls ( 4 ,  5 ), on backup rolls ( 6 ,  7 ,  8 ,  9 - 16   b ), which are each rotatably mounted jointly on a support axle ( 17 ,  18 ,  19 ,  20 ), divided into at least three longitudinal sections (L 1 , L 2 , L 3 ), and having at least one actuating device, which is assigned to at least one of the support axles ( 18 ) and includes actuator drives ( 35 ,  36 ,  37 ), each one of which is assigned to one of the longitudinal sections (L 1 , L 2 , L 3 ) of the support axle ( 18 ) and has a force directed transversely to the longitudinal direction of the support axle ( 18 ) applied to the respective longitudinal section (L 1 , L 2 , L 3 ) via a group (G 1 , G 2 , G 3 ) of actuators ( 24 ,  25 ,  26 ;  27 ,  28 ;  29 ,  30 ,  31 ), which are coupled to one another via a coupling element ( 32 ,  33 ,  34 ) in regard to their movement in relation to the support axle ( 18 ) to correct the roll gap ( 3 ) between the working rolls ( 1 ,  2 ).  
     
     
         2 . The cluster mill according to  claim 1 , characterized in that the support axle ( 18 ) is divided into longitudinal sections (L 1 , L 2 , L 3 ), which are symmetrically arranged starting from the middle of the longitudinal extension of the support axle ( 18 ).  
     
     
         3 . The cluster mill according to  claim 2 , characterized in that there is a longitudinal section (L 2 ), which is positioned in alignment to the middle (M) of the longitudinal extension of the support axle ( 18 ), and the actuator drive ( 36 ) assigned to this longitudinal section (L 2 ) applies the force, generated by the actuator drive ( 36 ), to the coupling element ( 33 ) of the group (G 2 ) of actuators ( 27 ,  28 ) assigned to this longitudinal section (L 2 ) at a location positioned in alignment to the middle of the longitudinal extension.  
     
     
         4 . The cluster mill according to one of the preceding claims, characterized in that, in at least one group (G 1 , G 3 ) of actuators ( 24 ,  25 ,  27 ;  29 ,  30 ,  31 ), which are coupled to one another, the assigned actuator drive ( 35 ,  37 ) applies the force, generated by the actuator drive ( 35 ,  37 ), to the coupling element ( 32 ,  34 ) at a location offset in relation to the middle of the longitudinal extension of the longitudinal section (L 1 , L 3 ) assigned to the group (G 1 , G 3 ).  
     
     
         5 . The cluster mill according to one of the preceding claims, characterized in that at least the coupling elements ( 32 ,  34 ), via which the respective actuators of the groups (G 1 , G 3 ) which are assigned to the longitudinal sections (L 1 , L 3 ) positioned at the outer ends of the support axle ( 18 ) are connected to one another, are mounted on the stand ( 22 ) of the rolling mill (W) in an articulated way.  
     
     
         6 . The cluster mill according to one of the preceding claims, characterized in that the backup rolls ( 6 ,  7 ,  8 ,  9 - 16   b ) are positioned at regular intervals (a) along the support axle ( 18 ).  
     
     
         7 . The cluster mill according to one of the preceding claims, characterized in that the actuator drives ( 33 ,  34 ,  35 ) operate hydraulically.