Towards advanced welding methods for the ITER vacuum vessel sectors

L. Jones, P. Aubert, F. Coste, H. Handroos, Tommi Jokinen, Veli Kujanpää, P. Meja, K. Nightingale, W. Wykes

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

5 Citations (Scopus)

Abstract

The problem of joining the ITER VV sectors, considering the tolerance requirements of the blanket attachments, and the time required for TIG welding, continues to stimulate EU R&D into power beam welding techniques for fewer passes and lower distortion by a factor of up to 5. The work on reduced pressure e-beam welding showed that penetration varied with position, fit-up, distance and pressure and single-pass weld control seemed impractical so work on a combination of rest-current-control root weld followed by wire-fill passes promises a practical solution. The NdYAG laser welding has yielded useful and stable results and demonstrated the possibilities of improved performance over TIG. Design on the welding robot has been simulated by the successful use of computational virtual modeling techniques. A robust, singularity-free, hydraulic, parallel-configuration robot is under construction to demonstrate welding and control scenarios and the possibility of active suppression of vibrations induced by machining forces.
Original languageEnglish
Title of host publication22nd Symposium on Fusion Technology
Subtitle of host publicationBook of Abstracts
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages344-344
ISBN (Electronic)951-38-5731-X
ISBN (Print)951-38-5730-1
Publication statusPublished - 2002
Event22nd Symposium on Fusion Technology - Helsinki, Finland
Duration: 9 Sep 200213 Sep 2002
Conference number: 22

Publication series

SeriesVTT Symposium
Number220
ISSN0357-9387

Conference

Conference22nd Symposium on Fusion Technology
Abbreviated titleSOFTA
CountryFinland
CityHelsinki
Period9/09/0213/09/02

Fingerprint

Welding
Vacuum
Welds
Robots
Laser beam welding
Electric current control
Joining
Machining
Hydraulics
Wire

Keywords

  • welding

Cite this

Jones, L., Aubert, P., Coste, F., Handroos, H., Jokinen, T., Kujanpää, V., ... Wykes, W. (2002). Towards advanced welding methods for the ITER vacuum vessel sectors. In 22nd Symposium on Fusion Technology: Book of Abstracts (pp. 344-344). [JO-15] Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 220
Jones, L. ; Aubert, P. ; Coste, F. ; Handroos, H. ; Jokinen, Tommi ; Kujanpää, Veli ; Meja, P. ; Nightingale, K. ; Wykes, W. / Towards advanced welding methods for the ITER vacuum vessel sectors. 22nd Symposium on Fusion Technology: Book of Abstracts. Espoo : VTT Technical Research Centre of Finland, 2002. pp. 344-344 (VTT Symposium; No. 220).
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Jones, L, Aubert, P, Coste, F, Handroos, H, Jokinen, T, Kujanpää, V, Meja, P, Nightingale, K & Wykes, W 2002, Towards advanced welding methods for the ITER vacuum vessel sectors. in 22nd Symposium on Fusion Technology: Book of Abstracts., JO-15, VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 220, pp. 344-344, 22nd Symposium on Fusion Technology, Helsinki, Finland, 9/09/02.

Towards advanced welding methods for the ITER vacuum vessel sectors. / Jones, L.; Aubert, P.; Coste, F.; Handroos, H.; Jokinen, Tommi; Kujanpää, Veli; Meja, P.; Nightingale, K.; Wykes, W.

22nd Symposium on Fusion Technology: Book of Abstracts. Espoo : VTT Technical Research Centre of Finland, 2002. p. 344-344 JO-15 (VTT Symposium; No. 220).

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

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T1 - Towards advanced welding methods for the ITER vacuum vessel sectors

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AB - The problem of joining the ITER VV sectors, considering the tolerance requirements of the blanket attachments, and the time required for TIG welding, continues to stimulate EU R&D into power beam welding techniques for fewer passes and lower distortion by a factor of up to 5. The work on reduced pressure e-beam welding showed that penetration varied with position, fit-up, distance and pressure and single-pass weld control seemed impractical so work on a combination of rest-current-control root weld followed by wire-fill passes promises a practical solution. The NdYAG laser welding has yielded useful and stable results and demonstrated the possibilities of improved performance over TIG. Design on the welding robot has been simulated by the successful use of computational virtual modeling techniques. A robust, singularity-free, hydraulic, parallel-configuration robot is under construction to demonstrate welding and control scenarios and the possibility of active suppression of vibrations induced by machining forces.

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Jones L, Aubert P, Coste F, Handroos H, Jokinen T, Kujanpää V et al. Towards advanced welding methods for the ITER vacuum vessel sectors. In 22nd Symposium on Fusion Technology: Book of Abstracts. Espoo: VTT Technical Research Centre of Finland. 2002. p. 344-344. JO-15. (VTT Symposium; No. 220).