Method and bending device for bending a sheet metal part

Abstract

In a method for bending a sheet-metal part ( 50 ) on a profile body ( 24 ) having a bending profile ( 52 ), the sheet-metal part ( 26, 28 ) is pressed against the profile body ( 24 ) at an initial contact point ( 54 ), wherein bending rollers ( 26, 28 ), starting from the initial contact point ( 54 ), press the sheet-metal part ( 50 ) along the bending profile ( 52 ) against the profile body ( 24 ) and adapt it plastically to the shape of the profile body ( 24 ). Furthermore, a bending device ( 22 ) for carrying out the method is specified.

1 . Method for bending a sheet metal part on a profile body comprising a bending profile, the sheet metal part being pressed against the profile body at an initial contact point, and bending rollers pressing the sheet metal part along the bending profile against the profile body and plastically adapting to the shape of the profile body. 
   
   
       2 . Method according to  claim 1 , wherein the bending rollers mounted on a carriage are pressed against the sheet metal part by lifting the carriage. 
   
   
       3 . Method according to  claim 2 , wherein the bending rollers, rotatably mounted on a single axis, are guided by further lifting of the carriage on the profile body along the bending profile. 
   
   
       4 . Method according to  claim 2 , wherein by lifting the carriage carrying the bending rollers in a single step for pressing the sheet metal part against the profile body and for adapting the sheet metal part to the shape of the profile body. 
   
   
       5 . Method according to  claim 2 , wherein the sheet metal part before the start of the bending process at the initial contact point is pressed against the profile body by a counter support mounted on the carriage and is held during the bending process at the initial contact point. 
   
   
       6 . Bending device for bending a sheet metal part on a profile body comprising a bending profile, with a carriage arranged at a variable distance therefrom, on which bending rollers connected to one another in the manner of a tension spring are mounted for pressing the sheet metal part at an initial contact point and along the bending profile of the profile body. 
   
   
       7 . Bending device according to  claim 6 , wherein bending stresses exerted by the bending rollers on the sheet metal part are approximately uniform during a complete bending process. 
   
   
       8 . Bending device according to  claim 6  wherein the carriage is configured to be able to be lifted vertically relative to the sheet metal part. 
   
   
       9 . Bending device according to  claim 6 , further comprising supports which are movably arranged on the carriage for guiding the bending rollers mounted on a single axis thereon along the bending profile. 
   
   
       10 . Bending device according to  claim 6 , wherein the profile body is fixed. 
   
   
       11 . Bending device according to  claim 6 , further comprising a counter support for pressing the sheet metal part against the initial contact point of the profile body. 
   
   
       12 . Bending device according to  claim 11 , wherein the counter support is connected to the carriage in the manner of a compression spring. 
   
   
       13 . Bending device according to  claim 12 , wherein the counter support is provided with a pressing side facing the sheet metal part and, in the unloaded state of the compression spring, is at a greater distance from the carriage than the bending rollers which are mounted on the carriage via the supports. 
   
   
       14 . Bending device according to  claim 13 , wherein the counter support on the pressing side comprises a counter profile which is identical to the bending profile of the profile body in the region of the initial contact point. 
   
   
       15 . Bending device according to  claim 6 , wherein the profile body is designed as a piston roller in the manner of a cylinder, which is provided for a radial piston machine. 
   
   
       16 . Bending device according to  claim 11 , further comprising two bending rollers coupled to one another by a tension spring.