Numerical Study of Keyhole Centroid Infrared Image Based on Fixed Threshold Method during High Power Fiber Laser Welding

DOI

10.2991/emeit.2012.261How to use a DOI?

Keywords

Molten pool, Seam gap, High-power fiber laser welding, Weld seam.

Abstract

Seam tracking is significant to obtain good welding quality. Aiming at establishing a model to detect and calculate the seam tracking offset during high-power fiber laser welding of Type 304 austenitic stainless steel plate butt joint welding, an infrared sensitive high-speed camera arranged off-axis orientation of laser beam was applied to capture the dynamic thermal images of molten pools. Through analyzing the molten pool infrared images, the keyhole was extracted by using the fixed threshold method. Extracted keyhole image from different threshold values 0.55, 0.65, 0.85, and 0.93, were further analyzed to study their differences. Using keyhole images and calculating the keyhole centroid during high-power fiber laser welding, the deviations between the keyhole centroid and the welding seam was analyzed. The welding experiments confirmed that the keyhole centroid was related to the seam offset and the proposed welding seam equation was effective.

Copyright

© 2012, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yu-Quan Chen
AU  - Xiang-Dong Gao
AU  - Jian-Yuan Huang
AU  - Qian Wen
PY  - 2012/09
DA  - 2012/09
TI  - Numerical Study of Keyhole Centroid Infrared Image Based on Fixed Threshold Method during High Power Fiber Laser Welding
BT  - Proceedings of the 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT 2012)
PB  - Atlantis Press
SP  - 1189
EP  - 1192
SN  - 1951-6851
UR  - https://doi.org/10.2991/emeit.2012.261
DO  - 10.2991/emeit.2012.261
ID  - Chen2012/09
ER  -