A computational fluid dynamic analysis of the effect of weld nozzle geometry changes on shielding gas coverage during gas metal arc welding

Stuart Campbell, Alexander Galloway, Gemma Ramsey, Norman McPherson

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Three geometry changes to the inner bore of a welding nozzle and their effects on weld quality during gas metal arc welding (GMAW) were investigated through
the use of computational fluid dynamic (CFD) models and experimental trials. It
was shown that an increased shielding gas exit velocity increased the gas
column’s stability and therefore its resistance to side draughts. Double helix
geometry within the nozzle reduced the gas column’s stability by generating a
fast moving wall of gas around a slow moving centre. A pierced internal plate
initially increased the gas velocity, however, the nozzle was unable to maintain
the velocity and the change produced gas columns of similar stability to a
standard nozzle. A pierced end plate produced the best results, increasing the
shielding gases exit velocity sufficiently to marginally outperform the standard
16 mm welding nozzle.
LanguageEnglish
Article number051016
Number of pages8
JournalJournal of Manufacturing Science and Engineering
Volume135
Issue number5
Early online date2 Sep 2013
DOIs
Publication statusPublished - 16 Sep 2013

Fingerprint

Gas metal arc welding
Shielding
Dynamic analysis
Nozzles
Computational fluid dynamics
Welds
Gases
Geometry
Welding
Dynamic models

Keywords

  • CFD
  • GMAW
  • shielding gas coverage
  • nozzle geometry
  • side draughts

Cite this

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abstract = "Three geometry changes to the inner bore of a welding nozzle and their effects on weld quality during gas metal arc welding (GMAW) were investigated throughthe use of computational fluid dynamic (CFD) models and experimental trials. Itwas shown that an increased shielding gas exit velocity increased the gascolumn’s stability and therefore its resistance to side draughts. Double helixgeometry within the nozzle reduced the gas column’s stability by generating afast moving wall of gas around a slow moving centre. A pierced internal plateinitially increased the gas velocity, however, the nozzle was unable to maintainthe velocity and the change produced gas columns of similar stability to astandard nozzle. A pierced end plate produced the best results, increasing theshielding gases exit velocity sufficiently to marginally outperform the standard16 mm welding nozzle.",
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A computational fluid dynamic analysis of the effect of weld nozzle geometry changes on shielding gas coverage during gas metal arc welding. / Campbell, Stuart; Galloway, Alexander; Ramsey, Gemma; McPherson, Norman.

In: Journal of Manufacturing Science and Engineering, Vol. 135, No. 5, 051016, 16.09.2013.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A computational fluid dynamic analysis of the effect of weld nozzle geometry changes on shielding gas coverage during gas metal arc welding

AU - Campbell, Stuart

AU - Galloway, Alexander

AU - Ramsey, Gemma

AU - McPherson, Norman

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AB - Three geometry changes to the inner bore of a welding nozzle and their effects on weld quality during gas metal arc welding (GMAW) were investigated throughthe use of computational fluid dynamic (CFD) models and experimental trials. Itwas shown that an increased shielding gas exit velocity increased the gascolumn’s stability and therefore its resistance to side draughts. Double helixgeometry within the nozzle reduced the gas column’s stability by generating afast moving wall of gas around a slow moving centre. A pierced internal plateinitially increased the gas velocity, however, the nozzle was unable to maintainthe velocity and the change produced gas columns of similar stability to astandard nozzle. A pierced end plate produced the best results, increasing theshielding gases exit velocity sufficiently to marginally outperform the standard16 mm welding nozzle.

KW - CFD

KW - GMAW

KW - shielding gas coverage

KW - nozzle geometry

KW - side draughts

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