ACTIVE THERMOGRAPHY INSPECTION OF WELDING LASERS SCANNING HEAD PROTECTIVE GLASS

1 ŠVANTNER Michal
Co-authors:
2 FRANC Aleš 3 TESAŘ Jiří 4 SKÁLA Jiří
Institutions:
1 UWB - University of West Bohemia, Plzeň, Czech Republic, msvantne@ntc.zcu.cz
2 UWB - University of West Bohemia, Plzeň, Czech Republic, afranc@ntc.zcu.cz
3 UWB - University of West Bohemia, Plzeň, Czech Republic, tesar@ntc.zcu.cz
4 UWB - University of West Bohemia, Plzeň, Czech Republic, jskala@ntc.zcu.cz
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
934-939
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
86 views / 34 downloads
Abstract

Technological lasers are a useful tool for laser welding as well as other material treatment and production processes. Lasers with an optical scanning head are the important group of technological lasers. A protection glass of the scanning heads can be contaminated during technological operations. This results in properties change and degradation of the glass and subsequent production quality reduction. Active thermography is one of the methods, which can be used for the protection glass inspection. The method uses external thermal excitation of the glass and detection of its response by an infrared camera. Experiments performed showed that a pollution of the protection glass can be inspected using flash-pulse thermography. Experimental set-up for the flash-pulse thermographic testing and results of tested samples inspections are presented in the contribution. Possibilities, advantages or disadvantages and possible development of the thermographic inspection of laser scanning heads protection glasses are discussed.

Keywords: laser beam welding, active thermography, inspection, infrared testing, protective glass

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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