Method for the production of a semi -finished product for a wing-shaped element

Abstract

Method for producing a semi-finished product for a wing-shaped element having, a front and rear edge, an arched bottom and a top wall that extends some distance apart between the front edge and the rear edge, includes: bending the sheet by forming two panels ( 3, 4 ) and a curved region which the panels adjoin, placing a former in the bent sheet with the front edge of the former positioned in the curved region, forcing a pressure member towards a rubber cushion with the bent sheet enclosed therebetween and deforming the sheet, placing the shaped sheet in a rubber press including a bottom block having a cavity with a shape approximately corresponding to the of one of the walls of the shaped sheet, pressing the shaped sheet with former between the bottom block and a rubber mat, removing the semi-finished product from the rubber press.

1 - 15 . (canceled)  
   
   
       16 . Method for the production of a semi-finished product ( 13 ) for a wing-shaped element ( 15 ) having, in cross-section, a front edge ( 2 ), a rear edge ( 14 ) and an arched bottom wall ( 3 ) and an arched top wall ( 4 ) that extend some distance apart between the front edge ( 2 ) and the rear edge ( 14 ), comprising the following steps: 
 providing a metal sheet ( 1 ),    bending the sheet ( 1 ) with the formation of two panels ( 3 ,  4 ) as well as a curved region ( 2 ) which the panels ( 3 ,  4 ) adjoin,    providing a former ( 10 ), the exterior of which has the shape of the internal surface of the finished element ( 15 ),    placing the former ( 10 ) in the bent sheet ( 1 ) with the front edge of the former ( 9 ) positioned in the curved region ( 2 ),    providing an edge press ( 5 ) provided with a pressure member ( 8 ) and a rubber cushion ( 7 ) located opposite,    fixing the former ( 10 ) to the pressure member ( 8 ),    forcing the pressure member ( 8 ) towards the rubber cushion ( 7 ) with the bent sheet ( 1 ) enclosed between them and deforming said sheet between the former ( 10 ) and the rubber cushion ( 7 ),    removing the former ( 10 ) with shaped sheet ( 1 ′) from the edge press ( 5 ),    placing the shaped sheet ( 1 ′) in a rubber press provided with a bottom block having a cavity ( 16 ) which has a shape that at least approximately corresponds to the external shape of one of the walls ( 3 ,  4 ) of the shaped sheet ( 1 ′),    pressing the shaped sheet ( 1 ′) with former ( 10 ) between the bottom block ( 11 ) and a rubber mat ( 12 ),    removing the semi-finished product ( 13 ) from the rubber press.    
   
   
       17 . Method according to  claim 16 , wherein the two panels ( 3 ,  4 ) are arched after, or before, or at the same time as bending the sheet ( 1 ).  
   
   
       18 . Method according to  claim 16 , comprising bending the curved region ( 2 ) and optionally arching the panels ( 3 ,  4 ) by means of roller forming.  
   
   
       19 . Method according to  claim 16 , comprising bending the curved region ( 2 ) and optionally arching the panels ( 3 ,  4 ) by means of rolling.  
   
   
       20 . Method according to  claim 16 , comprising constructing the rear edge using a section ( 14 ) that is fixed to the top wall ( 3 ) and the bottom wall ( 4 ) with the formation of a wing-shaped element ( 15 ).  
   
   
       21 . Method according to  claim 16 , including a heat treatment step, such as stress-free annealing or solution annealing of the semi-finished product ( 13 ).  
   
   
       22 . Wing-shaped element ( 15 ) produced in accordance with the method according to  claim 16  made as a vane.  
   
   
       23 . Element ( 15 ) according to  claim 22  as produced by means of the method according to claim  5 , wherein the section ( 14 ) has a body ( 19 ) that extends between the panels ( 3 ,  4 ).  
   
   
       24 . Element ( 15 ) according to  claim 23 , wherein the panels ( 3 ,  4 ) and the body ( 19 ) are fixed to one another by rivets ( 18 ), bonding and the like.  
   
   
       25 . Element ( 15 ) according to  claim 23 , wherein the surfaces ( 16 ,  17 ) of the body ( 19 ) facing away from one another run obliquely with respect to one another in accordance with the run of the panels ( 3 ,  4 ).  
   
   
       26 . Element ( 15 ) according to  claim 22 , wherein the panels ( 3 ,  4 ) are fixed directly to one another.  
   
   
       27 . Element ( 15 ) according to  claim 22 , comprising a sheet ( 1 ) with a thickness in the range of 0.8-2.0 mm.  
   
   
       28 . Element ( 15 ) according to  claim 27 , comprising a sheet ( 1 ) with a thickness in the range of 1.4-1.6 mm.  
   
   
       29 . Element ( 15 ) according to  claim 27 , comprising a sheet ( 1 ) with a thickness in the region of 1.6 mm.  
   
   
       30 . Element ( 15 ) according to  claim 22 , comprising a sheet material consisting of Al, Ti, Sc, Cu, Mg, Li and/or alloys thereof and/or steel and/or stainless steel.