Method and device for bending profiles with a variable cross-section

Abstract

A method for bending profiles, wherein the profiles have a profile web and bent or angled profile legs at lateral ends of the profile web, wherein the profile is bent or formed parallel to and in the plane of the profile web and the height of the profile web between the profile legs varies over the length of the profile. The profile is formed with a roll arrangement that has at least one supporting roll, one bending roll, and one forming roll positioned one after the other in the movement direction, wherein the supporting roll, the bending roll, and the forming roll rest against the profile or profile legs in lateral edge regions, and through the adjustment of the distance between the bending roll and the forming roll perpendicular to the movement direction of the profile, it is possible to adjust the bending radius of a profile.

1 . A method for bending profiles, comprising:
 forming a profile having a profile web and bent or angled profile legs at lateral ends of the profile web by using a roll arrangement that has at least one supporting roll, one bending roll, and one forming roll positioned one after the other in a movement direction, wherein the supporting roll, the bending roll, and the forming roll rest against the profile and profile legs in lateral edge regions, wherein the profile is laterally guided in lateral end regions of the profile, and the profile is bent or formed parallel to and in a plane of the profile web, and a height of the profile web between the profile legs varies over a length of the profile,   wherein through adjustment of a distance between the bending roll and the forming roll perpendicular to the movement direction of the profile, it is possible to adjust the bending radius of the profile.   
     
     
         2 . The method according to  claim 1 , wherein the bending roll and/or the forming roll are respectively supported so that the bending roll and the forming roll can be moved together with their respective guide device. 
     
     
         3 . The method according to  claim 1 , wherein the lateral end regions of the profile are laterally guided by slide elements. 
     
     
         4 . The method according to  claim 3 , wherein the slide elements are supported in floating fashion on the respective roll arrangement and are able to freely follow a height progression of the profile that is moving through the roll arrangement. 
     
     
         5 . The method according to  claim 3 , wherein the slide elements laterally guide the profile web and at least one slide element guides a profile leg. 
     
     
         6 . The method according to  claim 1 , wherein with a stationary bending roll the positions of the other tools are adapted to a progression of the profile contour during the bending process, or with a stationary supporting roll, the positions of the other tools are adapted to the progression of the profile contour during the bending process, so that it is possible to bend a wide variety of profiles without requiring a changeover to a different roll set, wherein a bending of different profiles or different bending radii is achieved by advancing the forming roll. 
     
     
         7 . The method according to  claim 6 , wherein the adjustment of different bending angles is carried out by adjusting a feed rate. 
     
     
         8 . The method according to  claim 1 , wherein after the roll arrangement in the transport direction of the profile, a torsion compensation device is provided in which the profile is at least laterally guided and twisted so that a torsion that is implemented by the bending in the roll arrangement is compensated for by an opposing torsion and the profile is straightened to a specified dimension. 
     
     
         9 . A device for bending profiles that have a profile web and bent or angled profile legs at lateral ends of the profile web, wherein a deformation or bending direction is parallel to and in a plane of the profile web and a height of the profile web varies over a length of the profile, wherein the device comprises:
 a roll arrangement having at least one supporting roll, one bending roll, and one forming roll positioned one after the other in a movement direction of the profile, wherein the supporting roll, the bending roll, and the forming roll rest against the profile in lateral end regions, and   at least one guide device positioned in a region of at least one of the rolls in lateral end regions of the profile, wherein the at least one guide device laterally and/or externally guides the profile,   wherein the bending roll and/or the forming roll are each movably supported in such a way that a distance of the rolls perpendicular to a feed direction of the profile is adjustable.   
     
     
         10 . The device according to  claim 9 , wherein the at least one guide device includes at least one slide element that rests laterally against the profile web. 
     
     
         11 . The device according to  claim 10 , wherein the slide elements rest against both sides of the profile web. 
     
     
         12 . The device according to  claim 9 , wherein to guide lateral end regions of the profile, a guide device is provided in the region of the supporting roll, forming roll, or bending roll, and the guide device also has at least one slide device with at least one slide element and one roll, wherein the roll engages the profile leg laterally from the outside while the at least one slide element rests against both sides of the profile web and/or rests against the profile leg from the inside, wherein the guide device also has slide rails in which the slide elements and/or rolls are supported in floating fashion so that the slide elements and/or rolls can be moved radially toward and radially away from the respective supporting roll and/or forming roll and/or bending roll. 
     
     
         13 . The device according to  claim 12 , wherein the forming roll and/or supporting roll and/or bending roll rests laterally against the outside of the profile leg and also rests against one side of the profile web while the slide rail of the guide device also includes a slide element, which rests against a diametrically opposite side of the profile web and/or profile leg so that the profile is guided on both sides in the region of the forming roll and/or supporting roll and/or bending roll. 
     
     
         14 . The device according to  claim 9 , wherein after the roll arrangement in the transport direction of the profile, a torsion compensation device is provided in which the profile is at least laterally guided and twisted so that a torsion that is implemented by the bending in the roll arrangement is compensated for by an opposing torsion and the profile is straightened to a specified dimension.