Very low power plasma cutting equipment

B - Operations – Transporting – 23 – K

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B23K 28/00 (2006.01) B23K 10/00 (2006.01) B23K 10/02 (2006.01) H05H 1/34 (2006.01) H05H 1/36 (2006.01)

Patent

CA 1244891

ABREGE DESCRIPTIF L'invention concerne le coupage ou soudage plasma. L'amorçage d'arc est provoqué par le court- circuit initial entre électrode, tuyère et pièce, par l'excitation, par la source de très basse tension, d'un relais de commande, de la fermeture du contact principal, après quoi le relais est maintenu en l'état par le courant de soudage ou coupage générant une tension aux bornes de l'inductance. Application à la commande de torche à allumage par court-circuit électrode-tuyère-torche. L'invention permet de supprimer la gâchette de mise en marche et les connexions électriques associées qui s'étendent jusque dans le corps de torche, et que l'on retrouve normalement dans ce type d'installation.

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