Study and control process in laser conduction welding for millisecond pulse duration range

Laurent Berthe; Delphine Delage; Didier Lepretre; Leonard Bacinello; Wolfgang Knapp; Nicolas Dumont; Friedrich Durand

doi:10.1117/12.486515

19 February 2003 Study and control process in laser conduction welding for millisecond pulse duration range

Laurent Berthe, Delphine Delage, Didier Lepretre, Leonard Bacinello, Wolfgang Knapp, Nicolas Dumont, Friedrich Durand

Proceedings Volume 4830, Third International Symposium on Laser Precision Microfabrication; (2003) https://doi.org/10.1117/12.486515
Event: LAMP 2002: International Congress on Laser Advanced Materials Processing, 2002, Osaka, Japan

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.

Citation Download Citation

Laurent Berthe, Delphine Delage, Didier Lepretre, Leonard Bacinello, Wolfgang Knapp, Nicolas Dumont, and Friedrich Durand "Study and control process in laser conduction welding for millisecond pulse duration range", Proc. SPIE 4830, Third International Symposium on Laser Precision Microfabrication, (19 February 2003); https://doi.org/10.1117/12.486515

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