Influences of welding conditions on the constricted TIG arcs

Kyohei Konishi, Masaya Shigeta, Manabu Tanaka, Akihisa Murata, Tadasuke Murata

Research output: Contribution to journalArticlepeer-review

Abstract

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 centre 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.

Original languageEnglish
Pages (from-to)927-934
Number of pages8
JournalWelding International
Volume30
Issue number12
DOIs
Publication statusPublished - 2016 Dec 1
Externally publishedYes

Keywords

  • heat flux
  • numerical simulation
  • TIG welding with a constricted nozzle
  • tip angle
  • welding conditions

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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