Tools and requirements for in-process quality control in laser beam welding

Holger Heyn; Ingo Decker; Helmut Wohlfahrt

doi:10.1117/12.184746

7 September 1994 Tools and requirements for in-process quality control in laser beam welding

Holger Heyn, Ingo Decker, Helmut Wohlfahrt

Proceedings Volume 2207, Laser Materials Processing: Industrial and Microelectronics Applications; (1994) https://doi.org/10.1117/12.184746
Event: Europto High Power Lasers and Laser Applications V, 1994, Vienna, Austria

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.

Citation Download Citation

Holger Heyn, Ingo Decker, and Helmut Wohlfahrt "Tools and requirements for in-process quality control in laser beam welding", Proc. SPIE 2207, Laser Materials Processing: Industrial and Microelectronics Applications, (7 September 1994); https://doi.org/10.1117/12.184746

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