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Proceedings Paper

Laser beam welding: recent developments on process conduction and quality assurance
Author(s): Helmut Huegel; Matthias G. Mueller; Bernd Hohenberger; Friedrich Dausinger
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Paper Abstract

Laser beam welding of aluminum alloys is becoming of increasing interest with respect to light-weight structures. Compared to welding of steel, the process is rendered difficult by the specific material properties. On the basis of a fundamental understanding of the relevant physical mechanisms, guidelines for a successful conduction of the welding process and quality assurance are presented. Factors relevant for deep penetration threshold, process efficiency, process stability and for achieving high seam quality are discussed. In particular, by the combination of two individual focal spots along or normal to the welding direction a process-adapted distribution of the laser power yields substantial improvements. With respect to quality assurance a new method presented here uses the relationship between the geometry of the keyhole and the emitted laser light to control welding depth and to monitor seam defects.

Paper Details

Date Published: 7 May 1999
PDF: 9 pages
Proc. SPIE 3571, Tenth International School on Quantum Electronics: Laser Physics and Applications, (7 May 1999); doi: 10.1117/12.347648
Show Author Affiliations
Helmut Huegel, Institut fuer Strahlwerkzeug (Germany)
Matthias G. Mueller, Institut fuer Strahlwerkzeug (Germany)
Bernd Hohenberger, Institut fuer Strahlwerkzeug (Germany)
Friedrich Dausinger, Institut fuer Strahlwerkzeug (Germany)

Published in SPIE Proceedings Vol. 3571:
Tenth International School on Quantum Electronics: Laser Physics and Applications
Peter A. Atanasov; Dimitar V. Stoyanov, Editor(s)

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