Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Correlation between photodiode monitoring and high speed imaging of the dynamics causing laser welding defects
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-8355-2414
2008 (English)In: Congress proceedings: ICALEO, 27th International Congress on Applications of Lasers and Electro-Optics : October 20 - 23, 2008 Pechanga Resort & Casino, Temecula, CA, USA ; [includes] Laser Materials Processing Conference, Laser Microprocessing Conference, Nanomanufacturing Conference / [ed] Yongfeng Lu, Orlando, Fla: Laser institute of America , 2008, 829-837 p.Conference paper, Published paper (Refereed)
Abstract [en]

Today merely a few monitoring systems for in-process detection of laser welding defects are commercially available. Despite a trend towards cameras, industrially more robust is still a photodiode, measuring in an optically filtered spectral window either the thermal emissions from the melt and vapour or the laser beam reflections. The monitoring rule for each application is identified empirically through correlations between the signal dynamics and welding defects, as the linking mechanism is non-trivial and therefore hardly understood. Thus the method does not provide a systematic guideline to detect a certain welding defect.The here presented approach studies the context between the photodiode signal, the welding defects and the vapour, melt pool, keyhole and temperature dynamics. Simultaneous laser-illuminated high speed imaging is compared to photodiode monitoring at three spectral windows in order to identify through simultaneous timing any linking dynamics in a qualitative manner. Supportive methods are emission modelling and thermal imaging. Several cases of joints, materials and defects were studied to develop an illustrated theoretical description of the defect-signal correlations.

Place, publisher, year, edition, pages
Orlando, Fla: Laser institute of America , 2008. 829-837 p.
National Category
Manufacturing, Surface and Joining Technology Applied Mechanics
Research subject
Manufacturing Systems Engineering; Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-31093Scopus ID: 75149188220Local ID: 527eedc0-c789-11dd-941d-000ea68e967bISBN: 978-0-912035-12-3 (electronic)OAI: oai:DiVA.org:ltu-31093DiVA: diva2:1004323
Conference
International Congress on Applications of Lasers & Electro-Optics : 20/10/2008 - 23/10/2008
Note
Godkänd; 2008; 20081211 (petern)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

Open Access in DiVA

fulltext(1329 kB)10 downloads
File information
File name FULLTEXT01.pdfFile size 1329 kBChecksum SHA-512
c5eca8f9674b91c64678192b255681e395bbe5d26cf205ae9eca4933f1ae8539e0eb5b2b092ab390a21b1bb0459f2e4c77386f3c13509105b051ed945afecc5b
Type fulltextMimetype application/pdf

Scopus

Search in DiVA

By author/editor
Norman, PeterEngström, HansGren, PerKaplan, Alexander
By organisation
Product and Production DevelopmentFluid and Experimental Mechanics
Manufacturing, Surface and Joining TechnologyApplied Mechanics

Search outside of DiVA

GoogleGoogle Scholar
Total: 10 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 28 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf