Closed loop control of laser welding using an optical spectroscopic sensor for Nd:YAG and CO2 lasers (Contributo in atti di convegno)

Type
Label
  • Closed loop control of laser welding using an optical spectroscopic sensor for Nd:YAG and CO2 lasers (Contributo in atti di convegno) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • Konuk A.R., Aarts R., In 't Veld B.H., Sibillano T., Rizzi D., Ancona A. (2011)
    Closed loop control of laser welding using an optical spectroscopic sensor for Nd:YAG and CO2 lasers
    in 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011, Orlando, FL; United States, 23-27 October 2011
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Konuk A.R., Aarts R., In 't Veld B.H., Sibillano T., Rizzi D., Ancona A. (literal)
Pagina inizio
  • 85 (literal)
Pagina fine
  • 94 (literal)
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  • cited By (since 1996)0; Conference of org.apache.xalan.xsltc.dom.DOMAdapter@67595054 ; Conference Date: org.apache.xalan.xsltc.dom.DOMAdapter@18a8efce Through org.apache.xalan.xsltc.dom.DOMAdapter@7b17ca07; Conference Code:87581 (literal)
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  • Proceedings of the 30th International congress on Applications of lasers and electro-optics ICALEO 2011 (literal)
Note
  • Scopu (literal)
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  • University of Twente, Laboratory of Mechanical Automation, P.O. Box 217, 7500 AE Enschede, Netherlands; CNR-IFN UOS Bari, Physics Department, via Amendola 173, I-70126 Bari, Italy (literal)
Titolo
  • Closed loop control of laser welding using an optical spectroscopic sensor for Nd:YAG and CO2 lasers (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 978-0-912035-94-9 (literal)
Abstract
  • Recent developments in laser joining show the applicability of spectral analysis of the plasma plume emission to monitor and control the quality of weld. The analysis of the complete spectra makes it possible to measure specific emission lines which reveal information about the welding process. The subsequent estimation of the electron temperature can be correlated with the quality of the corresponding weld seam. A typical quality parameter, for laser welds of stainless steel, is the achieved penetration depth of the weld. Furthermore adequate gas shielding of the welds has to be provided to avoid seam oxidation . In this paper monitoring and real-time control of the penetration depth during laser welding is demonstrated. Optical emissions in the range of 400nm and 560nm are collected by a fast spectrometer. The sensor data are used to determine the weld quality of overlap welds in AISI 304 stainless steel sheets performed both with CW Nd:YAG and CO2 lasers. A PI-controller adjusts the laser power aiming at a constant penetration. Optical inspection of the weld surface and microscopic analysis of weld cross sections were used to verify the results obtained with the proposed closed-loop system of spectroscopic sensor and controller. (literal)
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