Process for manufacturing slot-shaped openings on hollow sections and apparatus for implementing same

摘要

A process and apparatus for manufacturing slot-shaped openings on hollow sections is disclosed in which the openings are produced by a piercing cutting operation by means of a blade-type cutting tool by the displacement of material in a cutout-free manner. During the slotting operation, the hollow sections are supported from the inside around the openings to be formed. In order to produce slot-shaped openings in a simple manner while maintaining the shape of the hollow section on arbitrarily constructed hollow sections in a reliable process free of positional tolerances, the hollow section is inserted in a recess of an internal high pressure forming tool. The hollow section is slotted by the interaction of the cutting action of a cutting tool integrated in the internal high pressure forming tool and an internal high pressure generated inside the hollow section.