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Proceedings Paper

Tools and requirements for in-process quality control in laser beam welding
Author(s): Holger Heyn; Ingo Decker; Helmut Wohlfahrt
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Paper Abstract

In laser beam welding a variety of complex physical interactions take place, leading to a fluctuating process behavior. Most of the available in-process control facilities measure signals emitted from the interaction zone like the light-emission in different spectral regions or acoustic waves. The obtained signals contain statistic as well as periodic components, from which information about the temporal progress of the process has to be derived by well adapted signal analyzing methods. The paper is presenting a `hardware'-tool for process diagnostics in laser beam welding that has been developed. By several examples the application of different signal analyzing techniques is explained considering the signal level, signal statistics and frequency analysis. Finally, advantages and disadvantages are discussed in context to industrial use.

Paper Details

Date Published: 7 September 1994
PDF: 11 pages
Proc. SPIE 2207, Laser Materials Processing: Industrial and Microelectronics Applications, (7 September 1994); doi: 10.1117/12.184746
Show Author Affiliations
Holger Heyn, Technische Univ. Braunschweig (Germany)
Ingo Decker, Technische Univ. Braunschweig and Univ. of Essex (Germany)
Helmut Wohlfahrt, Technische Univ. Braunschweig (Germany)


Published in SPIE Proceedings Vol. 2207:
Laser Materials Processing: Industrial and Microelectronics Applications

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