GMAW shielding gas flow optimisation by refinement of nozzle geometry

Stuart Campbell, Alexander Galloway, Norman McPherson

Research output: Contribution to conferencePaper

1 Citation (Scopus)
114 Downloads (Pure)

Abstract

With an ongoing demand to improve the efficiency of the gas metal arc welding process, steps are being taken to reduce the shielding gas consumption. However, sufficient shielding gas coverage of the weld region is essential for the generation of high quality welds, and drafts can be detrimental to its efficiency. In industry, the general practise to ensure coverage is to increase
the shielding gas flow rate, however, too high a flow rate can induce undesirable turbulence in the shielding gas column, whilst adding unnecessary cost to the process. A simplified computational fluid dynamics model has been generated, and validated through extensive experimental trials, to accurately model the shielding gas flow when subjected to the adverse effects of cross drafts. Several nozzle geometry changes have been investigated with the aim of
improving the shielding gas column’s resistance to drafts, eliminating the requirement to increase the shielding gas flow rate.
Original languageEnglish
Pages2131-2137
Number of pages7
Publication statusPublished - 4 Aug 2013
Event8th Pacific Rim International Congress on Advanced Materials and Processing - Hawaii, United States
Duration: 4 Aug 20139 Aug 2013

Conference

Conference8th Pacific Rim International Congress on Advanced Materials and Processing
CountryUnited States
CityHawaii
Period4/08/139/08/13

Keywords

  • GMAW
  • CFD
  • shielding gas
  • cross draft
  • flow profile

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