METHOD FOR CREATING THROUGH-PASSAGES IN A METAL BODY BY MEANS OF HIGH-SPEED IMPACT CUTTING

摘要

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of action of the punch (11), forming a slug (13), and then the stroke movement is stopped and the punch (11) is withdrawn again, and in that in a subsequent step the slug (13), which is still located in the through-passage, is driven out of the through-passage by means of an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).