Establishing laser welding parameters to minimize weld-piece distortion by means of multi-line laser profilometry

Aleš Gorkic; Matija Jezeršek; Janez Možina; Janez Diaci

doi:10.1117/12.738680

26 April 2007 Establishing laser welding parameters to minimize weld-piece distortion by means of multi-line laser profilometry

Aleš Gorkic, Matija Jezeršek, Janez Možina, Janez Diaci

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Proceedings Volume 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 63461A (2007) https://doi.org/10.1117/12.738680
Event: XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2006, Gmunden, Austria

Abstract

The paper presents a new method for on-line acquisition of weld-piece surface topography during pulsed laser welding. The method is based on illumination of the weld-piece surface with multi-line laser projector and imaging of the illuminated surface with a digital camera. The acquired image is processed by a personal computer to get the three-dimensional (3D) weld-piece surface topography. The set-up was applied to minimize weld-piece distortion during laser butt-welding of low-carbon thin steel sheets. Methodology based on Taguchi methods was developed enabling optimization of processing parameters. Root-mean-square (RMS) of surface distortion was used as the scalar parameter quantifying the amount of distortion. The results show that laser pulse duration and welding speed have a major influence on RMS distortion.

Citation Download Citation

Aleš Gorkic, Matija Jezeršek, Janez Možina, and Janez Diaci "Establishing laser welding parameters to minimize weld-piece distortion by means of multi-line laser profilometry", Proc. SPIE 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 63461A (26 April 2007); https://doi.org/10.1117/12.738680

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KEYWORDS

Distortion

Laser welding

Image processing

Cameras

Pulsed laser operation

Projection systems

3D image processing

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