Perforation device used for perforating the reinforcing elements of an inner lining element of a vehicle comprises a flow unit which is alternately impinged with working pressure and testing pressure

摘要

Perforation device comprises a flow unit which is alternately impinged with working pressure and testing pressure, in which the testing pressure is adjusted to a value at which a punching stamp (6) of a punching device (1) is applied to the surface (11) of a plate (2). A sensor (10) measures the position of a plunger (9) and the signal obtained is used to evaluate the punching process.