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A predictive model for gas tungsten arc heat source
University West, Department of Engineering Science, Division of Welding Technology. (PTW)ORCID iD: 0000-0003-2535-8132
University West, Department of Engineering Science, Division of Welding Technology. (PTW)ORCID iD: 0000-0002-7897-621X
Chalmers University of Technology, Department of Applied Mechanics, Gothenburg, Sweden.
2016 (English)In: The 7th International Swedish Production Symposium, SPS16, Conference Proceedings: 25th – 27th of October 2016, Lund: Swedish Production Academy , 2016, 1-10 p.Conference paper, Published paper (Refereed)
Abstract [en]

Gas tungsten arcs are used as heat sources in production processes such as welding and metal deposition.However, the most advanced of the existing gas tungsten arc models still lack predicting the arc temperature observed experimentally, unless imposing a priori the extent of the cathode arc attachment.Possible causes of this problem were investigated. It was concluded that the physical state of the arcing gas tungsten cathode was too simplified by the existing models. This oversimplification results in an overestimation of the cathode arc attachment area and an underestimation of the arc temperature field.An improved model was developed based only on physical criteria. It was tested by comparison with experimental measurements available in the literature. Good agreement with the temperature measured on the cathode surface and within the arc were obtained.

Place, publisher, year, edition, pages
Lund: Swedish Production Academy , 2016. 1-10 p.
Keyword [en]
Electric arc, temperature distribution, welding heat source, metal deposition heat source
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering; Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-10247OAI: oai:DiVA.org:hv-10247DiVA: diva2:1053120
Conference
7th International Swedish Production Symposium, SPS16, Lund, Sweden, October 25–27, 2016
Available from: 2016-12-08 Created: 2016-12-08 Last updated: 2017-01-13Bibliographically approved

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