Details
| Original language | English |
|---|---|
| Pages (from-to) | 459-464 |
| Number of pages | 6 |
| Journal | Procedia CIRP |
| Volume | 3 |
| Issue number | 1 |
| Publication status | Published - 15 Aug 2012 |
| Externally published | Yes |
| Event | 45th CIRP Conference on Manufacturing Systems, CMS 2012 - Athens, Greece Duration: 16 May 2012 → 18 May 2012 |
Abstract
We demonstrate a technique, which significantly enhances the stability of copper welding with laser radiation. After modelling spot welding stability we conclude that oxide layer morphology typical for native oxide layers has to be avoided. We locally normalize the surface oxidation degree using laser pulses in the nanosecond pulse duration regime (short prepulsing). Thereby, the absorptivity is reliably increased, setting uniform starting conditions for laser welding. A process window is identified, where all experimental repetitions lead to successful welds. With prepulsing, the spot weld diameter variation is decreased to 2% and the necessary welding energy is decreased up to 40%.
Keywords
- Copper, Laser, Prepulsing, Reliability, Stability, Welding
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Procedia CIRP, Vol. 3, No. 1, 15.08.2012, p. 459-464.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Reliable copper spot welding with ir laser radiation through short prepulsing
AU - Moalem, Anas
AU - von Witzendorff, Philipp
AU - Stute, Uwe
AU - Overmeyer, Ludger
N1 - Funding information: A significant part of the investigations was carried during the research project SUPREME. For project funding and support we thank the Federal Ministry of Education and Research (BMBF) and Projektträger Karlsruhe (PTKA). We also thank our project partners Sill Optics, neoLASE, Ilfa and arteos for their valuable cooperation.
PY - 2012/8/15
Y1 - 2012/8/15
N2 - We demonstrate a technique, which significantly enhances the stability of copper welding with laser radiation. After modelling spot welding stability we conclude that oxide layer morphology typical for native oxide layers has to be avoided. We locally normalize the surface oxidation degree using laser pulses in the nanosecond pulse duration regime (short prepulsing). Thereby, the absorptivity is reliably increased, setting uniform starting conditions for laser welding. A process window is identified, where all experimental repetitions lead to successful welds. With prepulsing, the spot weld diameter variation is decreased to 2% and the necessary welding energy is decreased up to 40%.
AB - We demonstrate a technique, which significantly enhances the stability of copper welding with laser radiation. After modelling spot welding stability we conclude that oxide layer morphology typical for native oxide layers has to be avoided. We locally normalize the surface oxidation degree using laser pulses in the nanosecond pulse duration regime (short prepulsing). Thereby, the absorptivity is reliably increased, setting uniform starting conditions for laser welding. A process window is identified, where all experimental repetitions lead to successful welds. With prepulsing, the spot weld diameter variation is decreased to 2% and the necessary welding energy is decreased up to 40%.
KW - Copper
KW - Laser
KW - Prepulsing
KW - Reliability
KW - Stability
KW - Welding
UR - http://www.scopus.com/inward/record.url?scp=84879191542&partnerID=8YFLogxK
U2 - 10.1016/j.procir.2012.07.079
DO - 10.1016/j.procir.2012.07.079
M3 - Conference article
AN - SCOPUS:84879191542
VL - 3
SP - 459
EP - 464
JO - Procedia CIRP
JF - Procedia CIRP
SN - 2212-8271
IS - 1
T2 - 45th CIRP Conference on Manufacturing Systems, CMS 2012
Y2 - 16 May 2012 through 18 May 2012
ER -