Apparatus and method for welding

B - Operations – Transporting – 23 – K

Patent

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Details

B23K 9/173 (2006.01) B23K 35/22 (2006.01) B23K 35/368 (2006.01) B23K 35/38 (2006.01)

Patent

CA 2646000

The present invention relates to arc welding torch and a method of extracting fume gas from a welding site. The torch comprises a metal electrode and at least one shield gas port adapted to direct a shield gas curtain around the metal electrode and a welding site. At least one shroud gas port is spaced radially outward from the shield gas port and adapted to impart to an exiting shroud gas a radially outward component of velocity. Fume gas is preferably extracted from a position radially intermediate the shield gas curtain and the shroud gas curtain.

La présente invention concerne une torche de soudage à l'arc et un procédé d'extraction des gaz de fumée depuis un site de soudage. La torche comprend une électrode métallique et au moins un orifice de gaz de protection apte à diriger un rideau de gaz de protection autour de l'électrode métallique et d'un site de soudage. Au moins un orifice de gaz d'enveloppement est espacé radialement vers l'extérieur par rapport à l'orifice de gaz de protection et configuré pour donner à un gaz d'enveloppement sortant une composante de vitesse orientée radialement vers l'extérieur. Les gaz de fumée sont de préférence extraits depuis un endroit radialement intermédiaire entre le rideau de gaz de protection et le rideau de gaz d'enveloppement.

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