Improved welding torch and method of use

B - Operations – Transporting – 23 – K

Patent

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B23K 9/12 (2006.01) B23K 9/29 (2006.01)

Patent

CA 2282340

The invention comprises a method of arc welding and apparatus associated with the method. Preferred embodiments deliver welding wire from an associated autofeed source along a substantially straight path and into the weld zone. The resistance of the wire to further travel within the weld zone results in the torch assembly being propelled along the workpiece at a constant speed proportional to the rate of wire feed. This allows high quality welds substantially free of waves or ridges to be consistently made and at high speeds - 1000 mm per minute - being achieved in trials. The invention also addresses some problems associated with the welding of difficult materials, or when heavier gauge welding wires are used.

La présente invention concerne un procédé de soudage à l'arc et l'appareil adapté à ce procédé. Des réalisations préférées du procédé consistent à apporter dans la zone de soudage sur un trajet sensiblement rectiligne le fil-électrode au moyen d'une source associée à alimentation automatique. La résistance du fil à progresser dans la zone de soudage provoque la propulsion de l'ensemble tête de soudage le long de la pièce à une vitesse constante proportionnelle à la vitesse d'alimentation en fil-électrode. Cela permet de réaliser des soudures de haute qualité sensiblement exemptes de vagues et de rides, et ce, à une vitesse élevée, les 1.000 mm/mn ayant été atteints lors d'essais. L'invention permet de résoudre en partie certains problèmes rencontrés dans le cas de matériaux difficiles à souder ou en cas d'utilisation de fils-électrodes de gros calibre.

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