Details
| Original language | English |
|---|---|
| Pages (from-to) | 438-441 |
| Number of pages | 4 |
| Journal | Procedia CIRP |
| Volume | 124 |
| Early online date | 11 Sept 2024 |
| Publication status | Published - 2024 |
| Event | 13th CIRP Conference on Photonic Technologies, LANE 2024 - Fürth, Germany Duration: 15 Sept 2024 → 19 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.
Keywords
- High power laser beam welding, Keyhole protrusions, Temporal power modulation
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Procedia CIRP, Vol. 124, 2024, p. 438-441.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Temporal power modulation in high power laser beam welding of round bars
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.
KW - High power laser beam welding
KW - Keyhole protrusions
KW - Temporal power modulation
UR - http://www.scopus.com/inward/record.url?scp=85204338177&partnerID=8YFLogxK
U2 - 10.1016/j.procir.2024.08.149
DO - 10.1016/j.procir.2024.08.149
M3 - Conference article
AN - SCOPUS:85204338177
VL - 124
SP - 438
EP - 441
JO - Procedia CIRP
JF - Procedia CIRP
SN - 2212-8271
T2 - 13th CIRP Conference on Photonic Technologies, LANE 2024
Y2 - 15 September 2024 through 19 September 2024
ER -