Patent ID: 9669449
Date: 2017-06-06
CPC Classifications: B21D,B21K,F16B,Y10T

Claim:
1. A method for producing a through hole in a metallic body, the method comprising: placing the metallic body that comprises a triangular cross-section with three corners, wherein at least one of the three corners is a rounded corner and wherein a material thickness of the metallic body is measured from a connecting line of the two corners opposite said rounded corner to a tip of said rounded corner, onto a die; carrying out a stroke movement with a plunger by high-speed impact cutting (HSIC) to cut adiabatically the through hole with a hole diameter through the metallic body from said rounded corner transversely to the connecting line of the two corners with a ratio of the hole diameter relative to the material thickness of equal to or greater than 0.92 and less than 1.5.