Rolling mill with support plates

Abstract

In order to shorten the delivery path of working rolls for their replacement in a rolling mill with support plates which are provided on an operating side (BS) of roll stands (F 1 -Fi), are displaced transversely to roll axes, are outfitted for receiving working roll sets ( 4 ), and are located adjacent to a mill floor level ( 7 ) for transporting the working rolls ( 4 ) back and forth, and with trenches ( 10 ) which are arranged upstream of respective roll stands (F 1 -Fi) on the operating side (BS) and a base ( 11 ) of which is outfitted for delivery of back-up roll sets ( 9 ), it is suggested that a transport device ( 12 ) be associated a transport device ( 12 ) is associated with the support plates ( 2 ) for transporting respective support plates ( 2 ) back and forth between a position for replacing the working rolls and in which the support plates ( 2 a ) are arranged immediately adjacent to the roll stands above the trenches ( 10 ), and a position of replacing back-up rolls and in which the support plates ( 2 c ) are located beneath the mill floor level ( 7 ) adjacent to a trench region.

1 . A rolling mill, comprising support plates which are provided on an operating side (BS) of roll stands (F 1 -Fi), are displaced transversely to roll axes, are outfitted for receiving working roll sets ( 4 ), and are located adjacent to a mill floor level ( 7 ) for transporting the working rolls ( 4 ) back and forth; and trenches ( 10 ) which are arranged upstream of respective roll stands (F 1 -Fi) on the operating side (BS) and a base ( 11 ) of which is outfitted for delivery of back-up roll sets ( 9 ), 
 characterized in that    a transport device ( 12 ) is associated with the support plates ( 2 ) for transporting respective support plates ( 2 ) between a position for replacing the working rolls and in which the support plates ( 2   a ) are arranged immediately adjacent to the roll stands above the trenches ( 10 ), and a position replacing back-up rolls and in which the support plates ( 2   c ) are located beneath the mill floor level ( 7 ) adjacent to a trench region.    
     
     
         2 . A roll mill according to  claim 1 , 
 characterized in that    the transport device ( 12 ) comprises an undercarriage ( 13 ) with rollers ( 15 ) and on which a support plate ( 2 ) is transversely displaceably arranged, and the rollers ( 15 ) cooperate with ramps ( 20 ) arranged on a base ( 11 ) of a respective trench ( 10 ), wherein the undercarriage ( 13 ) is displaceable over the ramps ( 20 ) from a position beneath the mill floor level ( 7 ) into an elevated position in the trench ( 10 ), and the support plates ( 2   a ) are aligned with the mill floor level in an end position for replacing the working rolls.    
     
     
         3 . A rolling mill according to  claim 1 , 
 characterized in that    a front and a real roller pair ( 15   a,    15   b ) of the undercarriage ( 13 ) and corresponding ramp pairs ( 20   a, b ) are offset relative to each other.    
     
     
         4 . A rolling mill according to  claim 1 , 
 characterized in that    for being displaced between the two positions, the undercarriage ( 13 ) cooperates with a piston-cylinder unit.    
     
     
         5 . A rolling mill according to  claim 4 , 
 characterized in that    the piston-cylinder unit is formed as a back-up rolls-replacing piston-cylinder unit ( 23 ).    
     
     
         6 . A rolling mill according to  claim 5 , 
 characterized in that    for facilitating of a delivery movement of the undercarriage ( 13 ) on a ramp pair ( 20   a, b ), the piston or the piston-extending traverse ( 24 ) of the back-up rolls-replacing, piston-cylinder unit ( 23 ) is connected with an end of a push rod ( 25 ) another end of which is arranged on the undercarriage ( 13 ), in particular, in the center.    
     
     
         7 . A rolling mill according to  claim 1 , 
 characterized in that    adjacent plates ( 2 ) are loosely arranged side-by-side in the working rolls-replacing position and are displaced together either in one or another direction with two displacement units ( 26 ) provided at respective ends of the support plate line ( 1 ).