Method for machining a sheet-metal profile

Abstract

The invention relates to a method for machining a sheet-metal profile 1 , wherein the sheet-metal profile 1 is trimmed in a multi-stage cutting process and a cutting edge 2 is produced. Here, pre-cutting is firstly performed on the sheet-metal profile 1 , whereby a free space 3 is generated. Stamping of the sheet-metal profile 1 is subsequently performed, wherein the thickness d of the sheet-metal profile 1 along the cutting edge 2 to be produced is reduced. Subsequently, the cutting finishing of the sheet-metal profile 1 is performed, wherein, in particular, cutting is performed in the opposite direction to the stamping of the outline of the finished contour, and the cutting edge 2 is generated.

1 - 6 . (canceled) 
     
     
         7 . A process of machining a sheet-metal profile, the process comprising:
 trimming the sheet-metal profile in a multi-stage cutting process forming a cutting edge, pre-cutting a free space in the sheet-metal profile,   stamping of the free space formed in the precutting of the sheet-metal profile, wherein a thickness of the sheet-metal profile along the cutting edge is reduced by the stamping, and   cutting finishing the sheet-metal profile,   wherein the cutting edge is formed such that the stamping and the cutting finishing are performed in opposite directions.   
     
     
         8 . A process according to  claim 7 , wherein the pre-cutting and the stamping are performed in opposite directions. 
     
     
         9 . A process according to  claim 7 , wherein the pre-cutting is performed along a pre-cutting edge, wherein the pre-cutting edge has a spacing to the cutting edge, which spacing is dimensioned to be between 30% and 75% of the thickness of the sheet-metal profile. 
     
     
         10 . A process according to  claim 7 , wherein the thickness of the sheet-metal profile is reduced by 15% to 50%, due to the stamping. 
     
     
         11 . A process according to  claim 7 , wherein during the stamping, a portion of the sheet-metal profile in a stamping zone is molded into the free space substantially at right angles with respect to the stamping direction. 
     
     
         12 . A process according to  claim 7 , wherein the sheet-metal profile is deformed before, during and after the cutting process. 
     
     
         13 . A process according to  claim 7 , wherein the thickness of the sheet-metal profile is reduced by 20% to 40%, due to the stamping. 
     
     
         14 . A process according to  claim 7 , wherein the thickness of the sheet-metal profile is reduced by 30%, due to the stamping. 
     
     
         15 . A process according to  claim 9 , wherein the spacing is dimensioned to be between 40% and 60% of the thickness of the sheet-metal profile. 
     
     
         16 . A process according to  claim 9 , wherein the pre-cutting is performed along the pre-cutting edge, wherein the pre-cutting edge has the spacing is dimensioned to be between 45% and 55% of the thickness of the sheet-metal profile. 
     
     
         17 . A process according to  claim 9 , wherein the pre-cutting is performed along the pre-cutting edge, wherein the pre-cutting edge has the spacing is dimensioned to be 50% of the thickness of the sheet-metal profile.