溶接学会論文集
Print ISSN : 0288-4771
狭窄ティグアークに及ぼす溶接条件の影響
小西 恭平茂田 正哉田中 学村田 彰久村田 唯介
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32 巻 (2014) 3 号 p. 207-212

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We investigate how welding conditions affect the arc in TIG welding with a constricted nozzle by numerical simulation using an axial-symmetric two-dimensional model. When helium is used as a shielding gas, the effect of the constricted nozzle is more remarkable than argon. The heat flux to the center of the anode surface increases more with a higher welding current. This feature is suitable for pulsed welding. Even if an electrode is consumed and its tip angle is changed, a stable arc plasma and heat intensity are obtained.

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