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Proceedings Paper

Study and control process in laser conduction welding for millisecond pulse duration range
Author(s): Laurent Berthe; Delphine Delage; Didier Lepretre; Leonard Bacinello; Wolfgang Knapp; Nicolas Dumont; Friedrich Durand
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Paper Abstract

A new system has been built allowing the fast control of the laser welding process in conduction regime. Based on a traditional Proportional Integral Derivative (PID) analysis, the system can regulate millisecond laser pulse (Its response time is 90 microseconds). Besides, the interaction in this regime has been monitored with different diagnostics. Visible signal above target, IR signal from surface and visualization from CCD camera have been correlated as function of laser power density to distinguish the different phases of interaction (pure conduction, vaporization and/or plasma). With this experimental set up, the detector used for control process could be calibrated. The integration of the system is shown for watch parts assembly.

Paper Details

Date Published: 19 February 2003
PDF: 4 pages
Proc. SPIE 4830, Third International Symposium on Laser Precision Microfabrication, (19 February 2003); doi: 10.1117/12.486515
Show Author Affiliations
Laurent Berthe, Cooperation Laser Franco-Allemande (France)
Delphine Delage, Cooperation Laser Franco-Allemande (France)
Didier Lepretre, Cooperation Laser Franco-Allemande (France)
Leonard Bacinello, Cooperation Laser Franco-Allemande (France)
Wolfgang Knapp, Cooperation Laser Franco-Allemande (France)
Nicolas Dumont, Laser Cheval (France)
Friedrich Durand, SMH Automation (Switzerland)

Published in SPIE Proceedings Vol. 4830:
Third International Symposium on Laser Precision Microfabrication
Isamu Miyamoto; Kojiro F. Kobayashi; Koji Sugioka; Reinhart Poprawe; Henry Helvajian, Editor(s)

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