Temporal power modulation in high power laser beam welding of round bars

Publikation: Beitrag in FachzeitschriftKonferenzaufsatz in FachzeitschriftForschungPeer-Review

Autorschaft

  • J. Grajczak
  • C. Nowroth
  • J. Twiefel
  • J. Wallaschek
  • S. Nothdurft
  • J. Hermsdorf
  • S. Kaierle

Externe Organisationen

  • Laser Zentrum Hannover e.V. (LZH)
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Seiten (von - bis)438-441
Seitenumfang4
FachzeitschriftProcedia CIRP
Jahrgang124
Frühes Online-Datum11 Sept. 2024
PublikationsstatusVeröffentlicht - 2024
Veranstaltung13th CIRP Conference on Photonic Technologies, LANE 2024 - Fürth, Deutschland
Dauer: 15 Sept. 202419 Sept. 2024

Abstract

Temporal power modulation bears an enormous potential for high power laser beam welding of round bars since all its specific challenges are faced. They can be summarised as deviating welding conditions towards the round bars centre. Accordingly, a tailored amount of energy would be provided to that area. The investigations are conducted on 30 mm diameter bars of 1.4301 stainless steel with the use of a 16 kW disk laser. The modulation parameters comprise 6/12/50/100/200 Hz modulation frequency and 0.30/0.47/0.73 modulation depth or power modulation ratio. Post analysis focuses on metallographic longitudinal sections and calculations. The modulations outstanding capability is creating deeper and narrower weld seams due to higher peak power and more intense evaporation of protrusions along the keyhole front wall. Therefore, more laser power is provided to the weld root and despite applying lower average power, the same weld depth is achieved. Finally, more ecological and economical welding as well as welding of more temperature sensitive materials is enabled.

ASJC Scopus Sachgebiete

Zitieren

Temporal power modulation in high power laser beam welding of round bars. / Grajczak, J.; Nowroth, C.; Twiefel, J. et al.
in: Procedia CIRP, Jahrgang 124, 2024, S. 438-441.

Publikation: Beitrag in FachzeitschriftKonferenzaufsatz in FachzeitschriftForschungPeer-Review

Grajczak, J, Nowroth, C, Twiefel, J, Wallaschek, J, Nothdurft, S, Hermsdorf, J & Kaierle, S 2024, 'Temporal power modulation in high power laser beam welding of round bars', Procedia CIRP, Jg. 124, S. 438-441. https://doi.org/10.1016/j.procir.2024.08.149
Grajczak, J., Nowroth, C., Twiefel, J., Wallaschek, J., Nothdurft, S., Hermsdorf, J., & Kaierle, S. (2024). Temporal power modulation in high power laser beam welding of round bars. Procedia CIRP, 124, 438-441. https://doi.org/10.1016/j.procir.2024.08.149
Grajczak J, Nowroth C, Twiefel J, Wallaschek J, Nothdurft S, Hermsdorf J et al. Temporal power modulation in high power laser beam welding of round bars. Procedia CIRP. 2024;124:438-441. Epub 2024 Sep 11. doi: 10.1016/j.procir.2024.08.149
Grajczak, J. ; Nowroth, C. ; Twiefel, J. et al. / Temporal power modulation in high power laser beam welding of round bars. in: Procedia CIRP. 2024 ; Jahrgang 124. S. 438-441.
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abstract = "Temporal power modulation bears an enormous potential for high power laser beam welding of round bars since all its specific challenges are faced. They can be summarised as deviating welding conditions towards the round bars centre. Accordingly, a tailored amount of energy would be provided to that area. The investigations are conducted on 30 mm diameter bars of 1.4301 stainless steel with the use of a 16 kW disk laser. The modulation parameters comprise 6/12/50/100/200 Hz modulation frequency and 0.30/0.47/0.73 modulation depth or power modulation ratio. Post analysis focuses on metallographic longitudinal sections and calculations. The modulations outstanding capability is creating deeper and narrower weld seams due to higher peak power and more intense evaporation of protrusions along the keyhole front wall. Therefore, more laser power is provided to the weld root and despite applying lower average power, the same weld depth is achieved. Finally, more ecological and economical welding as well as welding of more temperature sensitive materials is enabled.",
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AU - Grajczak, J.

AU - Nowroth, C.

AU - Twiefel, J.

AU - Wallaschek, J.

AU - Nothdurft, S.

AU - Hermsdorf, J.

AU - Kaierle, S.

N1 - Publisher Copyright: © 2024 The Authors.

PY - 2024

Y1 - 2024

N2 - Temporal power modulation bears an enormous potential for high power laser beam welding of round bars since all its specific challenges are faced. They can be summarised as deviating welding conditions towards the round bars centre. Accordingly, a tailored amount of energy would be provided to that area. The investigations are conducted on 30 mm diameter bars of 1.4301 stainless steel with the use of a 16 kW disk laser. The modulation parameters comprise 6/12/50/100/200 Hz modulation frequency and 0.30/0.47/0.73 modulation depth or power modulation ratio. Post analysis focuses on metallographic longitudinal sections and calculations. The modulations outstanding capability is creating deeper and narrower weld seams due to higher peak power and more intense evaporation of protrusions along the keyhole front wall. Therefore, more laser power is provided to the weld root and despite applying lower average power, the same weld depth is achieved. Finally, more ecological and economical welding as well as welding of more temperature sensitive materials is enabled.

AB - Temporal power modulation bears an enormous potential for high power laser beam welding of round bars since all its specific challenges are faced. They can be summarised as deviating welding conditions towards the round bars centre. Accordingly, a tailored amount of energy would be provided to that area. The investigations are conducted on 30 mm diameter bars of 1.4301 stainless steel with the use of a 16 kW disk laser. The modulation parameters comprise 6/12/50/100/200 Hz modulation frequency and 0.30/0.47/0.73 modulation depth or power modulation ratio. Post analysis focuses on metallographic longitudinal sections and calculations. The modulations outstanding capability is creating deeper and narrower weld seams due to higher peak power and more intense evaporation of protrusions along the keyhole front wall. Therefore, more laser power is provided to the weld root and despite applying lower average power, the same weld depth is achieved. Finally, more ecological and economical welding as well as welding of more temperature sensitive materials is enabled.

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