Spectroscopic closed loop control of penetration depth in laser beam welding process (Contributo in atti di convegno)

Type
Label
  • Spectroscopic closed loop control of penetration depth in laser beam welding process (Contributo in atti di convegno) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1117/12.906778 (literal)
Alternative label
  • Sibillano T., Ancona A., Rizzi D., Mezzapesa F., Konuk A.R., Aarts R., Huis In 't Veld B., Lugarà P.M. (2012)
    Spectroscopic closed loop control of penetration depth in laser beam welding process
    in High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications, San Francisco, CA; United States, 21-26 January 2012
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Sibillano T., Ancona A., Rizzi D., Mezzapesa F., Konuk A.R., Aarts R., Huis In 't Veld B., Lugarà P.M. (literal)
Pagina inizio
  • 82390S (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • cited By (since 1996)0; Conference of org.apache.xalan.xsltc.dom.DOMAdapter@261f8772 ; Conference Date: org.apache.xalan.xsltc.dom.DOMAdapter@5ff560eb Through org.apache.xalan.xsltc.dom.DOMAdapter@66ae1584; Conference Code:88786 (literal)
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  • http://www.scopus.com/inward/record.url?eid=2-s2.0-84857591591&partnerID=40&md5=3f2d6d8d1889b327c3c6b572afb40d3a (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • HIGH POWER LASER MATERIALS PROCESSING: LASERS, BEAM DELIVERY, DIAGNOSTICS, AND APPLICATIONS (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 8239 (literal)
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-IFN Istituto di Fotonica e Nanotecnologie, Bari, via Amendola 173, 70126 Bari, Italy Dipartimento Interateneo di Fisica, Università degli Studi e Politecnico di Bari, via Amendola 173, 70126 Bari, Italy University of Twente, Laboratory of Mechanical Automation, 7500 AE Enschede, Netherlands (literal)
Titolo
  • Spectroscopic closed loop control of penetration depth in laser beam welding process (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 9780819488824 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
  • Beyer E; Morris T (literal)
Abstract
  • In-process monitoring and feedback control are fundamental actions for stable and good quality laser welding process. In particular, penetration depth is one of the most critical features to be monitored. In this research, overlap welding of stainless steel is investigated to stably reproduce a fixed penetration depth using both CO 2 and Nd:YAG lasers. Plasma electron temperatures of Fe(I) and Cr(I) are evaluated as in process monitoring using the measurement of intensities of emission lines with fast spectrometers. The sensor system is calibrated using a quantitative relationship between electron temperature and penetration depth in different welding conditions. Finally closed loop control of the weld penetration depth is implemented by acquiring the electron temperature value and by adjusting the laser power to maintain a pre-set penetration depth. A PI controller is successfully used to stabilize the electron temperature around the set point corresponding to the right penetration depth starting from a wrong value of any initial laser power different than the set point. Optical inspection of the weld surface and macroscopic analyses of cross sections verify the results obtained with the proposed closed-loop system based on a spectroscopic controller and confirms the reliability of our system. (literal)
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