System for cold roll forming profiles having variable cross-sections

Abstract

The invention relates to a system for cold roll forming profiles having variable cross-sections, with several roll stands arranged in a row, each containing a pair of rollers, between which a sheet-metal strip ( 2 ) is guided along its length (X), wherein the roll stands are moved translationally transversely to the length of the sheet-metal strip and rotationally about an axis of the roll stand during cold roll forming. According to the invention, a re-forming device ( 8, 10, 12 ) is arranged behind at least one of the roll stands and has at least one drive for generating a movement of the re-forming device in a plane transversely to the length (X) of the sheet-metal strip. On the basis of data calculated from data relating to the material and thickness of the sheet-metal strip, the configuration and control data of the roll stands and the CAD data of the profiles to be shaped, the drive is controlled in such a way that, during ongoing operation of the system, the re-forming device automatically cancels any shape deviations in the sheet-metal strip leaving the at least one roll stand.

1 - 12 . (canceled) 
     
     
         13 . System for cold roll forming profiles having variable cross-sections, with several roll stands arranged in a row, each containing a pair of rollers, between which a sheet-metal strip is guided along its length, wherein the roll stands are moved translationally transversely to the length of the sheet-metal strip and rotationally about an axis of the roll stand during cold roll forming,
 wherein a re-forming device is arranged behind at least one of the roll stands and has at least one drive for generating a movement of the re-forming device in a plane transversely to the length of the sheet-metal strip, which drive, on the basis of data calculated from data relating to the material and thickness of the sheet-metal strip, the configuration and control data of the roll stands and the CAD data of the profiles to be shaped, is controlled in such a way that, during ongoing operation of the system, the re-forming device automatically cancels shape deviations in the sheet-metal strip leaving the at least one roll stand.   
     
     
         14 . System according to  claim 13 , wherein the re-forming device cancels shape deviations in the sheet-metal strip leaving the at least one roll stand by overbending in the opposite direction. 
     
     
         15 . System according to  claim 13 , wherein the re-forming device comprises at least two freely rotatable re-forming rollers arranged on mutually opposite sides of a portion of the sheet-metal strip, and wherein the lines along which the sheet-metal strip contacts the re-forming rollers are mutually spaced in the direction of the length of the sheet-metal strip. 
     
     
         16 . System according to  claim 15 , wherein the re-forming device comprises three freely rotatable re-forming rollers, two of which are arranged on one side of the sheet-metal strip and one of which is arranged on the opposite side of the sheet-metal strip. 
     
     
         17 . System according to  claim 16 , with one supporting roller for the two re-forming rollers arranged on the one side of the sheet-metal strip, which support themselves at an adjustable angle to each other on the circumference of the supporting roller and have a substantially smaller diameter than the re-forming roller arranged on the opposite side of the sheet-metal strip. 
     
     
         18 . System according to  claim 13 , wherein the re-forming device comprises two guiding shoes which are arranged on mutually opposite sides of a portion of the sheet-metal strip and between which the sheet-metal strip is guided substantially without play, but slidably along the length. 
     
     
         19 . System according to  claim 13 , wherein the re-forming device comprises two clamping shoes or press rams which clamp or press the sheet-metal strip between themselves and are movable and/or forcibly guided along a path extending in the longitudinal direction of the sheet-metal strip or at an inclination thereto. 
     
     
         20 . System according to  claim 13 , wherein the sheet-metal strip is partially heated by means of flames, laser beam or electromagnetic induction before it is fed into the re-forming device. 
     
     
         21 . System according to  claim 13 , wherein material is removed from, or added to, the sheet-metal strip in areas which are upset or stretched during subsequent deformation, before it is guided through the roll stands. 
     
     
         22 . System according to  claim 13 , wherein the sheet-metal strip is provided with cutouts, notches or slots in areas which are upset or stretched during subsequent deformation, before it is guided through the roll stands. 
     
     
         23 . System for cold roll forming profiles with variable cross-sections, having several roll stands arranged in a row, each containing a pair of rollers, between which a sheet-metal strip is guided along its length, wherein the roll stands are moved translationally transversely to the length of the sheet-metal strip and rotationally about an axis of the roll stand during cold roll forming,
 wherein the sheet-metal strip is provided with cutouts, notches or slots in areas which are upset or stretched during subsequent deformation, before it is guided through the roll stands.   
     
     
         24 . System according to  claim 13 , by means of which profiles with discontinuously variable cross-sections are produced. 
     
     
         25 . System according to  claim 23 , by means of which profiles with discontinuously variable cross-sections are produced.