Details
| Original language | English |
|---|---|
| Article number | 022207 |
| Journal | Journal of Laser Applications |
| Volume | 31 |
| Issue number | 2 |
| Publication status | Published - 17 Apr 2019 |
| Externally published | Yes |
Abstract
Due to their outstanding strength-to-weight ratio, carbon fiber reinforced plastics (CFRP) are of high interest for lightweight construction. Within industrial fields requiring lightweight design and energy efficiency, the demand for CFRP increases continuously. Until now, machining of CFRP, as a crucial step in the production chain of composite parts, is mainly performed by conventional techniques such as drilling, milling, and abrasive water jet cutting. These techniques come with known drawbacks, including force input, handling of auxiliaries, and tool wear. The laser cutting of CFRP has already shown its high potential to be a practical alternative due to wear-free and contactless processing. However, if sufficient cutting rates are required, laser cutting has to overcome the challenge of either nonorthogonal cutting edges when using short pulsed high power lasers or heat input into the material when using continuously emitting (continuous wave) high power singlemode laser sources, as shown by Staehr et al. [J. Laser Appl. 28, 022203 (2016)]. Within this investigation, the machining with a novel short pulsed high power laser source by Trumpf Laser GmbH emitting at λ = 1030 nm will be examined. The lab-state laser source provides nanosecond pulses at tp = 20 ns, at a maximum pulse energy of Ep = 100 mJ, and a maximum average power of Pavg = 1.5 kW, while maintaining a very good beam quality allowing for small focus diameters down to df = 84 μm with the focusing optics used. It was shown that processing with small focus diameters results in narrow cutting kerfs contributing to the cutting edge angle. In addition, the investigations revealed a minimized thermal load resulting from the short pulses. At the same time, challenges resulting from shielding effects when specific parameters are used will be displayed and discussed. Different processing strategies for adjusting the cutting edge angle toward orthogonality will be presented in this paper. This optimization procedure aims at the drilling of macroscopic holes with a diameter of Ø > 4 mm in CFRP laminates with a thickness of s ≥ 2 mm at very high precision.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Engineering(all)
- Biomedical Engineering
- Physics and Astronomy(all)
- Instrumentation
Sustainable Development Goals
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In: Journal of Laser Applications, Vol. 31, No. 2, 022207, 17.04.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High precision laser macrodrilling of carbon fiber reinforced plastics with a new nanosecond pulsed laser
T2 - Optimized toward industrial needs
AU - Staehr, R.
AU - Bastick, S.
AU - Bluemel, S.
AU - Jaeschke, P.
AU - Suttmann, Oliver
AU - Negel, J. P.
AU - Angrick, V.
AU - Stolzenburg, C.
AU - Kaierle, Stefan
AU - Overmeyer, Ludger
N1 - Funding information: The authors would like to thank the German Federal Ministry of Education and Research for the support within the joint project “Laser drilling of composite materials for aeronautical applications” (“LaBoKomp”), subproject “Development of an intelligent process for the efficient drilling of fiber reinforced composites in the aviation sector” (Contract No. 13N14111), which is based on the funding program Photonics Research Germany.
PY - 2019/4/17
Y1 - 2019/4/17
N2 - Due to their outstanding strength-to-weight ratio, carbon fiber reinforced plastics (CFRP) are of high interest for lightweight construction. Within industrial fields requiring lightweight design and energy efficiency, the demand for CFRP increases continuously. Until now, machining of CFRP, as a crucial step in the production chain of composite parts, is mainly performed by conventional techniques such as drilling, milling, and abrasive water jet cutting. These techniques come with known drawbacks, including force input, handling of auxiliaries, and tool wear. The laser cutting of CFRP has already shown its high potential to be a practical alternative due to wear-free and contactless processing. However, if sufficient cutting rates are required, laser cutting has to overcome the challenge of either nonorthogonal cutting edges when using short pulsed high power lasers or heat input into the material when using continuously emitting (continuous wave) high power singlemode laser sources, as shown by Staehr et al. [J. Laser Appl. 28, 022203 (2016)]. Within this investigation, the machining with a novel short pulsed high power laser source by Trumpf Laser GmbH emitting at λ = 1030 nm will be examined. The lab-state laser source provides nanosecond pulses at tp = 20 ns, at a maximum pulse energy of Ep = 100 mJ, and a maximum average power of Pavg = 1.5 kW, while maintaining a very good beam quality allowing for small focus diameters down to df = 84 μm with the focusing optics used. It was shown that processing with small focus diameters results in narrow cutting kerfs contributing to the cutting edge angle. In addition, the investigations revealed a minimized thermal load resulting from the short pulses. At the same time, challenges resulting from shielding effects when specific parameters are used will be displayed and discussed. Different processing strategies for adjusting the cutting edge angle toward orthogonality will be presented in this paper. This optimization procedure aims at the drilling of macroscopic holes with a diameter of Ø > 4 mm in CFRP laminates with a thickness of s ≥ 2 mm at very high precision.
AB - Due to their outstanding strength-to-weight ratio, carbon fiber reinforced plastics (CFRP) are of high interest for lightweight construction. Within industrial fields requiring lightweight design and energy efficiency, the demand for CFRP increases continuously. Until now, machining of CFRP, as a crucial step in the production chain of composite parts, is mainly performed by conventional techniques such as drilling, milling, and abrasive water jet cutting. These techniques come with known drawbacks, including force input, handling of auxiliaries, and tool wear. The laser cutting of CFRP has already shown its high potential to be a practical alternative due to wear-free and contactless processing. However, if sufficient cutting rates are required, laser cutting has to overcome the challenge of either nonorthogonal cutting edges when using short pulsed high power lasers or heat input into the material when using continuously emitting (continuous wave) high power singlemode laser sources, as shown by Staehr et al. [J. Laser Appl. 28, 022203 (2016)]. Within this investigation, the machining with a novel short pulsed high power laser source by Trumpf Laser GmbH emitting at λ = 1030 nm will be examined. The lab-state laser source provides nanosecond pulses at tp = 20 ns, at a maximum pulse energy of Ep = 100 mJ, and a maximum average power of Pavg = 1.5 kW, while maintaining a very good beam quality allowing for small focus diameters down to df = 84 μm with the focusing optics used. It was shown that processing with small focus diameters results in narrow cutting kerfs contributing to the cutting edge angle. In addition, the investigations revealed a minimized thermal load resulting from the short pulses. At the same time, challenges resulting from shielding effects when specific parameters are used will be displayed and discussed. Different processing strategies for adjusting the cutting edge angle toward orthogonality will be presented in this paper. This optimization procedure aims at the drilling of macroscopic holes with a diameter of Ø > 4 mm in CFRP laminates with a thickness of s ≥ 2 mm at very high precision.
UR - http://www.scopus.com/inward/record.url?scp=85064710006&partnerID=8YFLogxK
U2 - 10.2351/1.5096120
DO - 10.2351/1.5096120
M3 - Article
AN - SCOPUS:85064710006
VL - 31
JO - Journal of Laser Applications
JF - Journal of Laser Applications
SN - 1042-346X
IS - 2
M1 - 022207
ER -