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Closed Loop Control of the Laser Welding Process through the Measurement of Plasma

Objective

Laser welding is a widely used technique in automotive, aeronautical and shipbuilding industries. New developments are being investigated and it is expected that in the near future it will replace traditional welding techniques in many applications. During laser welding a free electron plasma is generated. The radiation emitted by that plasma and the plasma itself can be characterised by means of several specific measurements, among which specific wavelength radiation intensity, plasma electronic temperature and plasma electronic density are featured. Laser welding process is parameterised according to the characteristics of the specimens to be welded. Each type of specimen has its own parameter set, found during a design stage prior to fabrication. But due to laser facility degradation, ageing or unknown parameters that can influence the welding results the initial parameter set can loose its suitability, which induce human operators to tuning themselves the facility according to their knowledge. Moreover, manufacturing new things may require the calculation of a new parameter set, which is a time-consuming, waste-producer and cost ineffective process. Besides this, the problem of defective welded seams is always present. Defects cause product quality degradation and cost increase. Sometimes faults are originated by an inappropriate specimen preparation, but often an inadequate laser process tuning causes them. The objective of this project is to provide laser-welding facilities with an adaptronic module that, using knowledge-based intelligent algorithms founded on on-line self-optimisation and learning, gives the facilities self-adaptive capabilities for coping with changing production environments, allowing rapid reconfiguration and providing defect avoidance capabilities. This will be achieved by means of multi-layer control, plasma and radiation related sensing and actuator structures.

Field of science

  • /natural sciences/physical sciences/optics/laser physics

Call for proposal

FP7-SME-2007-1
See other projects for this call

Funding Scheme

BSG-SME - Research for SMEs

Coordinator

FUNDACION CARTIF
Address
Pq Tecnologico Boecillo 205
47151 Boecillo
Spain
Activity type
Research Organisations
EU contribution
€ 69 408,90
Administrative Contact
Julio González (Mr.)

Participants (7)

CONSIGLIO NAZIONALE DELLE RICERCHE
Italy
EU contribution
€ 1 000
Address
Piazzale Aldo Moro 7
00185 Roma
Activity type
Research Organisations
Administrative Contact
Angela Loiudice (Ms.)
UNIVERSITEIT TWENTE
Netherlands
EU contribution
€ 1 000
Address
Drienerlolaan 5
7522 NB Enschede
Activity type
Higher or Secondary Education Establishments
Administrative Contact
J. H. Van Houten-Vos (Ms.)
UNIVERZITA PALACKEHO V OLOMOUCI
Czechia
EU contribution
€ 1 000
Address
Krizkovskeho 8
771 47 Olomouc
Activity type
Higher or Secondary Education Establishments
Administrative Contact
Miroslav Hrabovský (Dr.)
Josdan Soldadura Laser y Ajuste S.C
Spain
EU contribution
€ 192 540
Address
Calle Calleja Y Zurita 19 1ºd
09001 Burgos
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Jose Luis Rojo (Mr.)
PRECITEC GMBH & CO KG
Germany
EU contribution
€ 378 580
Address
Draisstrasse 1
76571 Gaggenau
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Udo Hoeckelmann (Mr.)
VATRANS ZLIN VOS
Czechia
EU contribution
€ 187 150
Address
Bozeny Nemcove 379
760 01 Zlin
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Milan Lakomý (Dr.)
Flexweld BV
Netherlands
EU contribution
€ 192 540
Address
Bedrijvenweg 55
7442 CW Nijverdal
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Administrative Contact
Albert Hofmeijer (Mr.)