Self-diagnosing pierce nut installation apparatus

B - Operations – Transporting – 23 – P

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B23P 19/06 (2006.01) F16B 37/06 (2006.01)

Patent

CA 2517185

A self-diagnosing pierce nut installation apparatus including an installation head (20) attached to an upper die member of a die press having a reciprocating plunger (28) driving a pierce nut (64) against a panel (P), piercing a slug from the panel upon closing of the press and a rod (86) telescopically received in the plunger (28) resiliently biased through the nut bore if a slug is pierced from the panel (P) or against the panel if not pierced, and a sensor sensing axial movement of the rod (86) stopping the press if the rod (86) engages the panel (P). A die located in the lower die member includes a slug sensor (152) confirming receipt of the panel slug (S) through the die member (22).

L'invention concerne un appareil d'installation d'écrou auto-poinçonneur à auto-diagnostic comprenant : une tête d'installation (20) fixée à un élément de matrice supérieure d'une presse à matricer dotée d'un piston alternatif (28) entraînant un écrou auto-poinçonneur (64) contre un panneau (P), formant par perçage une débouchure dans le panneau lors de la fermeture de la presse ; une tige (86) logée télescopique dans le piston (28), sollicitée de manière élastique dans l'alésage de l'écrou si une débouchure est formée dans le panneau (P), ou contre le panneau s'il n'est pas percé ; et un capteur détectant le mouvement axial de la tige (86) stoppant le presse si la tige (86) vient contre le panneau (P). Une matrice située dans l'élément de matrice inférieure comprend un capteur de débouchure (152) confirmant la réception de la débouchure (S) par l'élément de matrice (22).

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