Casting roller with variable profile for casting metal strip in a casting roller plant

Abstract

The invention relates to a casting roller for the casting of metal strip in the casting gap between two parallel casting rollers with variable separation and which may be cooled. A shaft ( 1 ) with a shell ( 2 ), surrounding the above at a separation therefrom and an external cover ( 3 ), the circumferential surface of which may be adjusted with regard to the crowning thereof during the casting operation, for altering the shape of the external cover, are disclosed. Annular pressure chambers ( 3 c ) are thus formed on the inner side of the shell ( 2 ) for hydraulically pumping the above up, which are formed between the shells and applied strips ( 13 ). The casting roller further comprises means for connecting the annular pressure chambers ( 3 c ) to an external hydraulic pressure generating system.

1 . A casting roller for casting of metal strip in a casting gap between two variably spaced parallel and coolable casting rollers, characterized by: 
 a shaft ( 1 ) with a sleeve ( 2 ) surrounding it with a radial spacing and an outwardly lying shell ( 3 ) with an adjustable crowning or camber of its peripheries during casting operation, and    at least one annular pressure chamber ( 3   c ) which can be hydraulically pumped up and which is formed between the sleeve ( 2 ) and the shell ( 3 ) and with means for connecting the annular pressure chamber ( 3   c ) to an external hydraulic pressure generating system.    
     
     
         2 . A casting roller according to  claim 1  characterized in that in the interior of the casting roller, bands ( 13 ) are arranged which are deformable by high hydraulic pressure and apply their force components to radial combs which then produce a crowning or cambered deformation of the shell ( 3 ) of the casting roller ( 1 ).  
     
     
         3 . The casting roller according to  claim 1  or  claim 2  characterized in that the extent of the crowning or camber deformation is reproducibly adjustable by the measure of the pressure level in the hydraulic system.  
     
     
         4 . The casting roller according to one of claims  1  through  3  characterized in that for the casting roller a journaling with fixed side and releasable side mounting pieces ( 4 , 5 ), is provided on the end shaft stools ( 7 ,  7 ′).  
     
     
         5 . The casting roller according to one or more of claims  1  through  4  characterized by a drive device in the form of an annular torque motor ( 6 ) in a rotationally fixed connection with the shaft stub ( 7 ) located opposite the cooling medium feed and cooling medium discharge fittings ( 14   a ,  14   b ).  
     
     
         6 . The casting roller according to one or more of claims of claims  1  through  5  characterized in that the casting roller ( 1 ) has cooling medium bores ( 2   a ,  2   b ;  3   a ,  3   b ) traversed in axially opposite directions and which are connected by radial bores ( 1   a ,  1   b ) or radial slits in rings ( 9 , 10 ;  11 ,  12 ) with one another in a flow-through connection.  
     
     
         7 . The casting roller according to  claim 6  characterized in that cooling agent bores ( 2   a ,  2   b ;  3   a ,  3   b ) are dimensioned to have equal lengths in both flow directions for the respective casting rollers.  
     
     
         8 . The casting roller according to one or more of claims  1  through  7  characterized in that a connecting element is provided for the feed and discharge fittings ( 14   a ,  14   b ) for cooling water of a cooling water flow system in the form of a clamping plate ( 14 ).  
     
     
         9 . The casting roller according to one or more of claims  1  through  8  characterized in that pressurized oil feed required for the hydraulic expansion of the annular pressure chamber is provided with a closure element which is arranged opposite the cold water feed in the region of the one shaft stool ( 7 ).  
     
     
         10 . The casting roller according to one or more of claims  1  through  9 , characterized in that the casting roller is arranged on a stationary shaft ( 1 ).  
     
     
         11 . The casting roller according to one or more of claims  1  through  9 , characterized in that between the casting roller shell ( 3 ) and the casting roller shaft, pressure chambers are provided for torque transmission.  
     
     
         12 . The casting roller according to one or more of claims  1  through  11 , characterized in that the casting roller shell ( 3 ) is braced by radial combs ( 3   c ) at least partly having undercuts.