Original title: Study of laser wobbling welding process through the radiation of plasma plume
Authors: Mrňa, Libor ; Horník, Petr ; Jedlička, Petr ; Pavelka, Jan
Document type: Papers
Conference/Event: Lasers in Manufacturing Conference 2017 (LIM 2017), München (DE), 20170626
Year: 2017
Language: eng
Abstract: During laser welding with wobbling to the vector of the welding speed adds trivial movement of the beam in the shape of a circle or other shapes. Therefore, the laser beam moves with much higher current speeds than during normal welding. The melting of material on the leading edge of the keyhole occurs periodically. This fact is reflected in the character of the radiation of plasma plume over the keyhole. Experiments were conducted in which it was obtained spectrum of plasma plume radiation by using autocorrelation function for different parameters of circular wobbling (circle diameter, frequency) and for different materials. In the spectra are found the higher harmonic frequency of wobbling. The results were also compared with the radiation of the plasma plume during pulsed laser welding where the laser beam also periodically melts the leading edge.
Keywords: laser welding; process monitoring; wobbling
Project no.: LO1212 (CEP), TA04020456 (CEP)
Funding provider: GA MŠk, GA TA ČR
Host item entry: Lasers in Manufacturing Conference 2017. Proceedings

Institution: Institute of Scientific Instruments AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0279336

Permalink: http://www.nusl.cz/ntk/nusl-373339


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Research > Institutes ASCR > Institute of Scientific Instruments
Conference materials > Papers