Method for Creating Through-Passages in a Metal Body by Means of High-Speed Impact Cutting

Abstract

The invention relates to a method for creating through-passages in a metal body by means of high-speed impact cutting (HSIC) with a closed cutting line, characterized in that a punch ( 11 ) having a first dimension (D) corresponding to the through-passages is introduced down to an insertion depth at which the break passes through the entire metal body in the direction of action of the punch ( 11 ), forming a slug ( 13 ), and then the stroke movement is stopped and the punch ( 11 ) is withdrawn again, and in that in a subsequent step the slug ( 13 ), which is still located in the through-passage, is driven out of the through-passage by means of an ejector, which has a smaller second dimension than the punch ( 11 ).

What is claimed is: 
     
         1 - 6 . (canceled) 
     
     
         7 . A method for creating through-passages in a metal body by high-speed impact cutting (HSIC) with a closed cutting line, the method comprising:
 introducing a punch, comprising a first dimension that corresponds to a dimension of a through-passage to be produced, with a stroke movement to an insertion depth into a metal body, wherein at the insertion depth a break in a direction of action of the punch exists through the entire metal body and a slug is formed in a through-passage;   stopping the stroke movement of the punch;   retracting the punch;   driving the slug out of the through-passage with an ejector, wherein the ejector comprises a second dimension that is smaller compared to the first dimension of the punch.   
     
     
         8 . The method according to  claim 7 , wherein the ejector performs a stroke movement simultaneously with the punch. 
     
     
         9 . The method according to  claim 8 , comprising driving the ejector and the punch with the same drive. 
     
     
         10 . The method according to  claim 7 , wherein the ejector performs a stroke movement independent of the stroke movement of the punch. 
     
     
         11 . The method according to  claim 10 , comprising driving the punch with a first drive and driving the ejector with a second drive. 
     
     
         12 . The method according to  claim 7 , wherein the slug is a product to be produced. 
     
     
         13 . The method according to  claim 12 , wherein the slug is a gear. 
     
     
         14 . The method according to  claim 7 , wherein the through-passage that is produced by removing the slug from the metal body imparts a desired contour to a product to be produced. 
     
     
         15 . The method according to  claim 7 , wherein the metal body has a curved surface and the punch is introduced via the curved surface. 
     
     
         16 . The method according to  claim 7 , wherein the through-passage is a through-hole of a sliding block.