2results about "Evacuating shielding" patented technology

Shielding gas nozzle for a welding torch. The invention relates to a welding torch (10), comprising: - an electrode (11) extending along a longitudinal axis (X) and intended to form an electric arc with a workpiece, - a nozzle (12) arranged around the electrode, preferably coaxially, and set back longitudinally from the electrode, the nozzle being configured to eject a shielding gas, referred to as the external gas, flowing out of the nozzle, attached along the external surface of the electrode to the free end of the electrode protruding from the nozzle. Figure for the abstract: Fig. 5

Dual-flow shielding gas arc welding torch. The invention relates to a welding torch (10), comprising: - an electrode (11) extending along a longitudinal axis (X) and intended to form an electric arc with a workpiece, the electrode comprising an internal conduit (16) opening through a free end, the internal conduit being configured to circulate and then eject a shielding gas, called internal gas, through the free end, - a nozzle (12) arranged around the electrode, preferably coaxially, the nozzle being configured to eject a shielding gas, called external gas, from the nozzle to the free end of the internal conduit of the electrode, - flow control means for ejecting an internal gas flow (Fint) of composition and / or flow rate and / or pressure independent of that(s) of the external gas ejection flow (Fext). Figure for the abridged version: fig. 5