Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Optical techniques for real-time penetration monitoring for laser welding

Not Accessible

Your library or personal account may give you access

Abstract

Optical techniques for real-time full-penetration monitoring for Nd:YAG laser welding have been investigated. Coaxial light emission from the keyhole is imaged onto three photodiodes and a camera. We describe the spectral and statistical analyses from photodiode signals, which indicate the presence of a full penetration. Two image processing techniques based on the keyhole shape recognition and the keyhole image intensity profile along the welding path are presented. An intensity ratio parameter is used to determine the extent of opening at the rear of a fully opened keyhole. We show that this parameter clearly interprets a hole in formation or a lack of penetration when welding is performed on workpieces with variable thicknesses at constant laser power.

© 2005 Optical Society of America

Full Article  |  PDF Article
More Like This
Closed-loop power and focus control of laser welding for full-penetration monitoring

Fabrice Bardin, Adolfo Cobo, Jose M. Lopez-Higuera, Olivier Collin, Pascal Aubry, Thierry Dubois, Mats Högström, Per Nylen, Peter Jonsson, Julian D. C. Jones, and Duncan P. Hand
Appl. Opt. 44(1) 13-21 (2005)

Optical sensor for real-time monitoring of CO2 laser welding process

Antonio Ancona, Vincenzo Spagnolo, Pietro Mario Lugarà, and Michele Ferrara
Appl. Opt. 40(33) 6019-6025 (2001)

Status analysis of keyhole bottom in laser-MAG hybrid welding process

Lin Wang, Xiangdong Gao, and Ziqin Chen
Opt. Express 26(1) 347-355 (2018)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved