Method and Device for Bending and Reshaping Profiles By Means of Roller Bending or Matrix Bending

Abstract

A method and a device for bending and reshaping profiles by means of roller bending or matrix bending. The profile that is to be worked on is bent or reshaped under the influence of one or several bending tools. In order to be able to bend and reshape also brittle profiles that are difficult to bend, an oscillator whose oscillations are supplied to the profile that is to be bent or reshaped, at least in the reshaping zone, is assigned to at least one of the bending or reshaping tools, or both.

1 - 14 . (canceled) 
   
   
       15 . A method to bend and reshape profiles through roll or matrix bending, wherein the profile is bent or reshaped under the influence of at least one bending or reshaping tool, the method comprising:
 providing oscillations for said at least one bending or reshaping tool, or both;   applying the oscillations of the at least one bending or reshaping tool, or both, to the profile to be bent or reshaped in at least the reshaping zone; and   subjecting the profile to be bent or reshaped to a flow process whereby the outside of the material of the profile to be reshaped is stretched and the profile is compressed on the opposite area, the profile being subjected to the oscillations during the flow process.   
   
   
       16 . The method according to  claim 15 , wherein the reshaping of the profile is done using a roll bending process. 
   
   
       17 . The method according to  claim 15 , wherein the oscillations act in the longitudinal direction or in the radial direction, or both, onto the bending tool. 
   
   
       18 . The method according to  claim 16 , wherein the oscillations act in the longitudinal direction or in the radial direction, or both, onto the bending tool. 
   
   
       19 . The method according to  claim 15 , wherein the method employs advancing tools, the method further comprising applying the oscillations to the advancing tools. 
   
   
       20 . The method according to  claim 16 , wherein the method employs advancing tools, the method further comprising applying the oscillations to the advancing tools. 
   
   
       21 . The method according to  claim 15 , wherein the method employs mandrel tool shafts, the method further comprising introducing oscillations to the mandrel shaft tools. 
   
   
       22 . The method according to  claim 16 , wherein the method employs mandrel tool shafts, the method further comprising introducing oscillations to the mandrel shaft tools. 
   
   
       23 . The method according to  claim 15 , and further comprising imparting two or three-dimensional oscillations to the bending and reshaping tools. 
   
   
       24 . The method according to  claim 15 , wherein the oscillations are done in the range from about 16 to about 20 kHz. 
   
   
       25 . The method according to  claim 15 , wherein the oscillations are provided electromagnetically or piezoelectrically. 
   
   
       26 . The method according to  claim 15 , wherein the method employs an oscillator which introduces oscillations to the bending or reshaping tool, or both, directed in the longitudinal or the radial direction. 
   
   
       27 . The method according to  claim 15 , wherein the method employs an oscillator having three dimensional, current-fed electromagnetic windings. 
   
   
       28 . The method according to  claim 16 , wherein the method employs an oscillator having three dimensional, current-fed electromagnetic windings. 
   
   
       29 . The device according to  claim 27 , and further comprising placing vibration saddles between the oscillatorily excited bending or reshaping tools, or both, said saddles sitting against the profile to be bent. 
   
   
       30 . The device according to  claim 27 , wherein the method employs a chuck and an oscillator located in the chuck, the method further comprising exerting a longitudinally directed oscillation onto the profile held there via the jaws by means of said oscillator in the chuck. 
   
   
       31 . The device according to  claim 29 , wherein the method employs a chuck and an oscillator located in the chuck, the method further comprising exerting a longitudinally directed oscillation onto the profile held there via the jaws by means of said oscillator in the chuck. 
   
   
       32 . The device according to  claim 27 , wherein the method uses a mandrel station which supports the free rear ends of the mandrel rods, the method further comprising acting upon the mandrel station by a first mandrel oscillator. 
   
   
       33 . The device according to  claim 27 , wherein the method employs a mandrel shaft seat and a mandrel shaft seat oscillator in the mandrel shaft seat, the method further comprising introducing an oscillation to the mandrel shaft in the vertical direction by means of the mandrel shaft seat oscillator.