WELDING METHOD

PURPOSE:To obtain a bead having no oxide film by supplying a mixed gas containing an active gas from an inner cylinder side of a double structure nozzle, also leading in an inert gas from an outer cylinder side, and suppressing a mixing ratio of the active gas of the whole to specified % or below. C...

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Bibliographische Detailangaben
Hauptverfasser:	IMADA TAKEHIKO, KAMEI HIROMASA, FUKUNAGA YOSHIAKI
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a bead having no oxide film by supplying a mixed gas containing an active gas from an inner cylinder side of a double structure nozzle, also leading in an inert gas from an outer cylinder side, and suppressing a mixing ratio of the active gas of the whole to specified % or below. CONSTITUTION:A shield gas supply nozzle is formed by a double structure and constituted of an inner cylinder nozzle 4 and an outer cylinder nozzle 3. A mixed gas 6 containing an active gas such as CO2, etc. by several % is supplied to an inert gas from the inner cylinder nozzle 4, and also the inert gas 5 is jetted from the outer cylinder nozzle 3, and welding is executed. According to the method, a mixing ratio of the active gas of the whole can be suppressed to