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Proceedings Paper

Inspection of laser-seam welds in automobile manufacturing
Author(s): Bernd Spellenberg; Jurgen Zettner; Oliver Schreer; Michael Bassler; Manfred Haller; Thomas Lenzi; Thomas Hierl
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Paper Abstract

Recent developments in infrared camera technology, testing methods and data processing algorithms have brought significant progress for high resolution spatial and temporal analysis of thermal radiation. Together with industry standard automation technology and specific infrared image data processing it became possible to non destructively inspect laser welded seams and other types of joints using heat flux analysis subsequent to active thermal excitation. High thermal diffusion coefficients of the usually metallic samples under test make the availability of high-speed infrared cameras as a key hardware component indispensable. Since high-speed infrared cameras with frame rates of at least 500 Hz have become available for commercial applications, non-destructive testing systems with a new class of performance were designed, manufactured, and implemented at industrial sites. Heat flux analysis as a new and robust method of non-destructive testing has been implemented for various types of equipment, ranging from off-line tools for laboratory use to automated robot based systems enabling fast and operator-free in-line inspection. Depending on environment, implementation surroundings, and geometry of objects to be inspected, different types of pulsed or continuous operating heat sources (e.g. flash light, laser, ...) are selected. Due to its outstanding industrial relevance some examples of non-destructive testing of laser welded seams in automobile manufacturing are shown.

Paper Details

Date Published: 28 March 2005
PDF: 11 pages
Proc. SPIE 5782, Thermosense XXVII, (28 March 2005); doi: 10.1117/12.603771
Show Author Affiliations
Bernd Spellenberg, Thermosensorik GmbH (Germany)
Jurgen Zettner, Thermosensorik GmbH (Germany)
Oliver Schreer, Thermosensorik GmbH (Germany)
Michael Bassler, Thermosensorik GmbH (Germany)
Manfred Haller, DaimlerChrysler AG (Germany)
Thomas Lenzi, Volkswagen AG (Germany)
Thomas Hierl, Thermosensorik GmbH (Germany)

Published in SPIE Proceedings Vol. 5782:
Thermosense XXVII
G. Raymond Peacock; Douglas D. Burleigh; Jonathan J. Miles, Editor(s)

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