SCHUTZVORRICHTUNG FUER WERKZEUGMASCHINEN UND DEREN VERWENDUNG

摘要

An apparatus and process for protecting a press die and press frame from damage when stock has jammed therein. The apparatus includes a proximity sensor which senses metal entering the press, a proximity sensor to detect the stamped product, and a proximity sensor to detect the skeleton scrap metal left after the stamping. A press cycle detection sensor senses a cycle of the press and generates a timing pulse. Means for comparing signals generated by the proximity sensors is regulated by the timing pulse and includes a signal converter, a memory circuit, a signal comparator and a fault check operatively connected to one another. An output relay breaks the press circuit upon an appropriate signal.