Share Email Print
cover

Proceedings Paper

NIR-camera-based online diagnostics of laser beam welding processes
Author(s): Friedhelm Dorsch; Holger Braun; Steffen Keßler; Dieter Pfitzner; Volker Rominger
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We have developed an on-axis camera-based online sensor system for laser beam welding diagnostics that detects the thermal radiation in the near-infrared (NIR) spectral range between 1200 and 1700 nm. In addition to a sensor in the visible (VIS) range, our camera detects the thermal radiation of the weld pool more clearly, and it is also sensible to the radiation of the solidified weld seam. The NIR images are analyzed by real-time image processing. Features are extracted from the images and evaluated to characterize the welding process. Keyhole and weld pool analysis complement VIS diagnostics, whereas the observation of the weld seam and heat affected zone with an NIR camera allows online heat flux thermography. By this means we are able to detect bad joints in overlap weldings ("false friends") online during the welding process.

Paper Details

Date Published: 6 February 2012
PDF: 11 pages
Proc. SPIE 8239, High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications, 82390T (6 February 2012); doi: 10.1117/12.908646
Show Author Affiliations
Friedhelm Dorsch, TRUMPF Werkzeugmaschinen GmbH + Co. KG (Germany)
Holger Braun, TRUMPF Werkzeugmaschinen GmbH + Co. KG (Germany)
Steffen Keßler, TRUMPF Werkzeugmaschinen GmbH + Co. KG (Germany)
Dieter Pfitzner, TRUMPF Werkzeugmaschinen GmbH + Co. KG (Germany)
Volker Rominger, TRUMPF Laser- und Systemtechnik GmbH (Germany)


Published in SPIE Proceedings Vol. 8239:
High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications
Eckhard Beyer; Timothy Morris, Editor(s)

© SPIE. Terms of Use
Back to Top