System for metering the bending angle in a machine for...

B - Operations – Transporting – 21 – D

Patent

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B21D 5/04 (2006.01)

Patent

CA 2525693

A system is described for metering the bending angle of a metal sheet or section (35) in a bending machine (10) which comprises a fixed bed to support the sheet or section (35) to be machined, a support frame (12) for a press (15) comprising at least one mobile punch (32) and a corresponding fixed counter-punch (24) acting as temporary clamping means of the sheet or section (35) during the bending stage, also comprising at least one bending blade (20, 21) which in operation can be moved towards and away from the sheet or section (35) being machined, in order to shape this sheet or section (35). This system also comprises means for the remote measurement (39) of the instantaneous bending angle (.alpha.) of the piece (35) being machined, the measurement means (39) being suitable to take measurements at least two points of the distance of the piece (35) from the measurement means (39), to process the data relative to the distances measured, to obtain a value corresponding to the instantaneous bending angle (.alpha.) and to convert this value to an electric signal that can be subsequently used in order to check the implementation of the bending method.

La présente invention concerne un système permettant de mesurer l'angle de cintrage d'une tôle ou d'une section métallique (35) dans une cintreuse (10) qui comprend un lit fixe destiné à supporter la tôle ou la section (35) à usiner, un châssis de support (12) destiné à une presse (15) qui comprend au moins un poinçon mobile (32) et un contrepoinçon fixe (24) correspondant agissant comme une pince temporaire de la tôle ou de la section (35) pendant l'étape de cintrage. Cette machine comprend aussi au moins une lame de cintrage (20, 21) qui, en fonctionnement, peut être déplacée en direction de la tôle ou de la section (35) usinée ou à distance de celle-ci de façon à mettre en forme cette tôle ou cette section (35). Ce système comprend aussi un organe permettant de mesurer à distance (39) un angle de cintrage instantané (alfa) de la pièce (35) usinée, cet organe de mesure (39) convenant pour prendre des mesures en au moins deux points de distance de la pièce (35) à partir de cet organe de mesure (39), de façon à traiter les données relatives aux distances mesurées, de façon à obtenir une valeur correspondant à l'angle de cintrage instantanée (alfa) et, de façon à convertir cette valeur en signal électrique qui pourra être ensuite utilisé pour vérifier la mises en oeuvre du procédé de cintrage.

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