Original title: Influence of Cathode and Nozzle Wear on Distributions of Fluctuations in Cutting Arc
Authors: Gruber, Jan ; Šonský, Jiří ; Hlína, Jan
Document type: Papers
Conference/Event: Symposium on Physics of Switching Arc /20./, Nové Město na Moravě (CZ), 2013-09-02 / 2013-09-06
Year: 2013
Language: eng
Abstract: Electric arc produced by cutting plasma torch was observed by CCD camera. Fluctuations in arc plasma intensity were examined in several frequency intervals up to 50 kHz and distributions of their intensities were compared. Plasma torch was operated repeatedly in fixed-time cycles resulting in progressive wear of cathode and nozzle. Changes in distribution of overall arc intensity are rather small, showing compression and expansion zones. However, distributions of fluctuations intensities differ significantly during the nozzle lifecycle, exhibiting formation of double-layer structure and other noticeable changes. The fluctuation distributions are also influenced by frequency interval chosen for the analysis.
Keywords: fluctuations; nozzle lifecycle; plasma cutting
Host item entry: XXth Symposium on Physics of Switching Arc, ISBN 978-80-214-4753-0

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0224943

Permalink: http://www.nusl.cz/ntk/nusl-156683


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Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers