Method and device for producing structural elements from a deep drawing blank

Abstract

A method for producing components from a blank ( 1 ) made of a reshapable material, particular steel, in which the blank ( 1 ) is supported by a fluid cushion (F) against a shaping tool ( 5 ) during the deformation, and a device particularly intended for performing this method are disclosed. In the course of the method, the blank ( 1 ) is reshaped into an intermediate shape using the tool ( 5 ). Subsequently, the blank ( 1 ) deformed into the intermediate shape is locally deformed using a counter mold piece ( 6 ) which is moved against the blank ( 1 ) against the action direction (R) of the tool ( 5 ). In this way, exactly shaped components may be produced cost effectively without the danger of reduction in quality.

1 . A method for producing components from a blank ( 1 ) made of a reshapable material, particularly steel, in which the blank ( 1 ) is supported by a fluid cushion (F) against a shaping tool ( 5 ) during the deformation, comprising the following steps: 
 deformation of the blank ( 1 ) into an intermediate shape using the tool ( 5 ) and    subsequent localized deforming of the blank ( 1 ) deformed into the intermediate shape using a counter piece ( 6 ), which is moved against the blank ( 1 ) against the action direction (R) of the tool ( 5 ).    
     
     
         2 . The method according to  claim 1 , 
 characterized in that 
 the tool is a stamp which is adjustable in its position.  
   
     
     
         3 . The method according to  claim 1  or  2 , 
 characterized in that 
 the localized deformation is performed as soon as the pressure (P) in the fluid cushion (F) has reached a minimum value.  
 
 
     
     
         4 . The method according to  claim 3 , 
 characterized in that 
 the minimum value of the pressure (P) in the fluid cushion (F) corresponds to the pressure at which shaping of the additional form element (N) caused by the pressure of the fluid cushion (F) begins.  
   
     
     
         5 . The method according to one of the preceding claims, 
 characterized in that 
 the pressure (P) of the fluid cushion (F) is varied in relation to the previously existing pressure during the deforming using the counter mold piece ( 6 ).  
   
     
     
         6 . The method according to one of the preceding claims, 
 characterized in that    the pressure (P) of the fluid cushion (F) is elevated after reaching the final shape.    
     
     
         7 . A device for producing components from a blank ( 1 ) made of a reshapable material, particularly steel, having a receptacle ( 2 ) filled with a fluid, having a mechanism ( 4 ) for holding the blank ( 1 ) over an opening of the receptacle ( 2 ), and having a shaping tool ( 5 ) which is positionable in the region of the opening of a receptacle ( 2 ), 
 characterized in that    at least one counter mold piece ( 6 ), which is movable against the blank ( 1 ) against the action direction (R) of the tool ( 5 ), is positioned in the receptacle ( 2 ).    
     
     
         8 . The device according to  claim 7 , 
 characterized in that    the shaping tool is a stamp ( 5 ) which is adjustable in its position.    
     
     
         9 . The device according to  claim 7  or  8 , 
 characterized by  
 a control unit which outputs a signal for adjusting the counter mold piece ( 6 ) against the blank ( 1 ) as soon as a specific deformation of the blank ( 1 ) is achieved.  
 
     
     
         10 . The device according to  claim 7  or  8 , 
 characterized in that 
 the control unit outputs the signal for adjustment as soon as the pressure (P) of the fluid contained in the receptacle ( 2 ) has exceeded a specific value.  
 
 
     
     
         11 . The device according to one of  claims 7  to  10 , 
 characterized by 
 a controllable valve, using which the pressure (P) in the receptacle ( 2 ) is changeable.  
 
 
     
     
         12 . The device according to one of  claims 7  to  11 , 
 characterized by 
 a pressure generation mechanism ( 9 ), using which the pressure (P) of the pressure (P) contained in the receptacle ( 2 ) may be elevated.  
 
 
     
     
         13 . A use of a device according to one of  claims 7  to  12  for performing the method according to one of  claims 1  to  6 .