Laser microdrilling of CFRP with a nanosecond-pulsed high-power laser

Research output: Contribution to journalArticleResearchpeer review

Authors

  • R. Staehr
  • V. Wippo
  • P. Jaeschke
  • S. Kaierle

External Research Organisations

  • Laser Zentrum Hannover e.V. (LZH)
View graph of relations

Details

Original languageEnglish
Article number042028
JournalJournal of laser applications
Volume34
Issue number4
Early online date25 Oct 2022
Publication statusPublished - 1 Nov 2022

Abstract

The global demand for air travel and air transport is expected to further increase in the next couple of years, and so the environmental protection will also increasingly come into focus again. In the aviation sector, this means not only saving fuel and reducing emissions but also reducing the noise pollution caused by aircrafts. For this purpose, sound-absorbing acoustic liners are used, which consist of a sandwich structure with one perforated skin layer. To reduce weight, these outer layers are often made of carbon fiber-reinforced plastic (CFRP). For manufacturing these CFRP skin layers, laser drilling offers specific benefits, but when it comes to industrial applications, further process improvements are necessary. Although laser microdrilling is a well-known process in laser materials' processing, it has not yet been sufficiently investigated for the processing of carbon fiber-reinforced plastics. This study investigates the quality and efficiency of laser microdrilling with a 1.5 kW nanosecond-pulsed high-power laser for percussion drilling and helical drilling of thin CFRP laminates. The efficiency was evaluated in terms of drilling depth, the amount of energy required to remove a specific volume of material, and the time required to remove a specific volume of the material. The quality evaluation focused on the heat-affected zone and the hole taper. The efficiency and quality results were set in relation to higher-level parameters such as energy fluence in the laser spot, pulse overlap, or total energy applied. This facilitates future transferability to similar laser processes that may use laser machines and system technology with deviating specifications.

ASJC Scopus subject areas

Cite this

Laser microdrilling of CFRP with a nanosecond-pulsed high-power laser. / Staehr, R.; Wippo, V.; Jaeschke, P. et al.
In: Journal of laser applications, Vol. 34, No. 4, 042028, 01.11.2022.

Research output: Contribution to journalArticleResearchpeer review

Staehr R, Wippo V, Jaeschke P, Kaierle S. Laser microdrilling of CFRP with a nanosecond-pulsed high-power laser. Journal of laser applications. 2022 Nov 1;34(4):042028. Epub 2022 Oct 25. doi: 10.2351/7.0000809
Staehr, R. ; Wippo, V. ; Jaeschke, P. et al. / Laser microdrilling of CFRP with a nanosecond-pulsed high-power laser. In: Journal of laser applications. 2022 ; Vol. 34, No. 4.
Download
@article{5813a9130009443884881c843055d220,
title = "Laser microdrilling of CFRP with a nanosecond-pulsed high-power laser",
abstract = "The global demand for air travel and air transport is expected to further increase in the next couple of years, and so the environmental protection will also increasingly come into focus again. In the aviation sector, this means not only saving fuel and reducing emissions but also reducing the noise pollution caused by aircrafts. For this purpose, sound-absorbing acoustic liners are used, which consist of a sandwich structure with one perforated skin layer. To reduce weight, these outer layers are often made of carbon fiber-reinforced plastic (CFRP). For manufacturing these CFRP skin layers, laser drilling offers specific benefits, but when it comes to industrial applications, further process improvements are necessary. Although laser microdrilling is a well-known process in laser materials' processing, it has not yet been sufficiently investigated for the processing of carbon fiber-reinforced plastics. This study investigates the quality and efficiency of laser microdrilling with a 1.5 kW nanosecond-pulsed high-power laser for percussion drilling and helical drilling of thin CFRP laminates. The efficiency was evaluated in terms of drilling depth, the amount of energy required to remove a specific volume of material, and the time required to remove a specific volume of the material. The quality evaluation focused on the heat-affected zone and the hole taper. The efficiency and quality results were set in relation to higher-level parameters such as energy fluence in the laser spot, pulse overlap, or total energy applied. This facilitates future transferability to similar laser processes that may use laser machines and system technology with deviating specifications.",
author = "R. Staehr and V. Wippo and P. Jaeschke and S. Kaierle",
note = "Funding Information: This paper was based on the miBoS project (“Micro-drilling of sandwich materials”), which is funded by the German Federal Ministry for Economics and Climate Action (Funding Code No.",
year = "2022",
month = nov,
day = "1",
doi = "10.2351/7.0000809",
language = "English",
volume = "34",
journal = "Journal of laser applications",
issn = "1042-346X",
publisher = "Laser Institute of America",
number = "4",

}

Download

TY - JOUR

T1 - Laser microdrilling of CFRP with a nanosecond-pulsed high-power laser

AU - Staehr, R.

AU - Wippo, V.

AU - Jaeschke, P.

AU - Kaierle, S.

N1 - Funding Information: This paper was based on the miBoS project (“Micro-drilling of sandwich materials”), which is funded by the German Federal Ministry for Economics and Climate Action (Funding Code No.

PY - 2022/11/1

Y1 - 2022/11/1

N2 - The global demand for air travel and air transport is expected to further increase in the next couple of years, and so the environmental protection will also increasingly come into focus again. In the aviation sector, this means not only saving fuel and reducing emissions but also reducing the noise pollution caused by aircrafts. For this purpose, sound-absorbing acoustic liners are used, which consist of a sandwich structure with one perforated skin layer. To reduce weight, these outer layers are often made of carbon fiber-reinforced plastic (CFRP). For manufacturing these CFRP skin layers, laser drilling offers specific benefits, but when it comes to industrial applications, further process improvements are necessary. Although laser microdrilling is a well-known process in laser materials' processing, it has not yet been sufficiently investigated for the processing of carbon fiber-reinforced plastics. This study investigates the quality and efficiency of laser microdrilling with a 1.5 kW nanosecond-pulsed high-power laser for percussion drilling and helical drilling of thin CFRP laminates. The efficiency was evaluated in terms of drilling depth, the amount of energy required to remove a specific volume of material, and the time required to remove a specific volume of the material. The quality evaluation focused on the heat-affected zone and the hole taper. The efficiency and quality results were set in relation to higher-level parameters such as energy fluence in the laser spot, pulse overlap, or total energy applied. This facilitates future transferability to similar laser processes that may use laser machines and system technology with deviating specifications.

AB - The global demand for air travel and air transport is expected to further increase in the next couple of years, and so the environmental protection will also increasingly come into focus again. In the aviation sector, this means not only saving fuel and reducing emissions but also reducing the noise pollution caused by aircrafts. For this purpose, sound-absorbing acoustic liners are used, which consist of a sandwich structure with one perforated skin layer. To reduce weight, these outer layers are often made of carbon fiber-reinforced plastic (CFRP). For manufacturing these CFRP skin layers, laser drilling offers specific benefits, but when it comes to industrial applications, further process improvements are necessary. Although laser microdrilling is a well-known process in laser materials' processing, it has not yet been sufficiently investigated for the processing of carbon fiber-reinforced plastics. This study investigates the quality and efficiency of laser microdrilling with a 1.5 kW nanosecond-pulsed high-power laser for percussion drilling and helical drilling of thin CFRP laminates. The efficiency was evaluated in terms of drilling depth, the amount of energy required to remove a specific volume of material, and the time required to remove a specific volume of the material. The quality evaluation focused on the heat-affected zone and the hole taper. The efficiency and quality results were set in relation to higher-level parameters such as energy fluence in the laser spot, pulse overlap, or total energy applied. This facilitates future transferability to similar laser processes that may use laser machines and system technology with deviating specifications.

UR - http://www.scopus.com/inward/record.url?scp=85141026149&partnerID=8YFLogxK

U2 - 10.2351/7.0000809

DO - 10.2351/7.0000809

M3 - Article

AN - SCOPUS:85141026149

VL - 34

JO - Journal of laser applications

JF - Journal of laser applications

SN - 1042-346X

IS - 4

M1 - 042028

ER -