izpis_h1_title_alt

Fusing optical coherence tomography and photodiodes for diagnosis of weld features during remote laser welding of copper-to-aluminum
ID Brežan, Tine (Author), ID Franciosa, Pasquale (Author), ID Jezeršek, Matija (Author), ID Ceglarek, Dariusz (Author)

.pdfPDF - Presentation file, Download (2,61 MB)
MD5: 71F1B5C39603D979B868C04A710AAC14
URLURL - Source URL, Visit https://lia.scitation.org/doi/10.2351/7.0000803 This link opens in a new window

Abstract
This study has been designed to investigate whether variations in the features of laser weldments can be isolated and diagnosed by fusing photodiodes and optical coherence tomography (OCT). Two manufacturing scenarios (variation in laser power and focal offset) have been considered during remote laser welding of 0.2 mm thick Cu foils on 2 mm thick Al 1050 plates with an adjustable ring mode laser integrated with a 1D oscillation head. The process was monitored by measuring weld penetration depth with OCT and by process emissions (plasma and back-reflection) via photodiodes. The acquisition frequency of all signals was 40 kHz. Strong correlations (r > 0.75) were shown between plasma, back-reflection, and OCT signals and measured depth and width of the weld. Weak correlations (r < 0.5) between voids, cracks, and sensor signals were observed. Although plasma is the predominant signal that carries most of the information about the process, and the OCT allows direct measurement of the penetration depth, their integration reached 87% classification accuracy of the tested welding scenarios. The main misclassification was observed between “good weld” and “over weld,” defined by the measured weld depth. Sensor fusion strategies with manufacturing implications are discussed throughout the paper.

Language:English
Keywords:laser welding, process monitoring, OCT, photodetectors
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Version of Record
Year:2023
Number of pages:10 str,
Numbering:Vol. 35
PID:20.500.12556/RUL-143900 This link opens in a new window
UDC:621.791
ISSN on article:1042-346X
DOI:10.2351/7.0000803 This link opens in a new window
COBISS.SI-ID:138309123 This link opens in a new window
Publication date in RUL:18.01.2023
Views:473
Downloads:83
Metadata:XML RDF-CHPDL DC-XML DC-RDF
:
Copy citation
Share:Bookmark and Share

Record is a part of a journal

Title:Journal of laser applications
Shortened title:J. laser appl.
Publisher:Laser Institute of America
ISSN:1042-346X
COBISS.SI-ID:14231813 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Keywords:lasersko varjenje, nadzor procesa, OCT, fotodetektorji

Projects

Funder:ARRS - Slovenian Research Agency
Project number:P2-0392
Name:Optodinamika

Similar documents

Similar works from RUL:
Similar works from other Slovenian collections:

Back