Method for cutting out sections of elongated metallic bars, e.g. aluminum extrusions, has shearing action in place of sawing

摘要

A aluminum extrusion (10) has a flat plate area (12) with a stiffening rib structure (22) along one edge from which a section (39) is removed by a punching action followed by a shearing action to separate the bar into two parts (10.1,10.2).