Individualized and controlled laser beam pretreatment process for adhesive bonding of fiber-reinforced plastics. II. Automatic laser process control by spectrometry

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

  • Hagen Dittmar
  • Josef Weiland
  • Verena Wippo
  • Alexander Schiebahn
  • Peter Jaeschke
  • Stefan Kaierle
  • Uwe Reisgen
  • Ludger Overmeyer

Externe Organisationen

  • Laser Zentrum Hannover e.V. (LZH)
  • Rheinisch-Westfälische Technische Hochschule Aachen (RWTH)
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Aufsatznummer0000301
FachzeitschriftJournal of laser applications
Jahrgang33
Ausgabenummer1
Frühes Online-Datum17 Dez. 2020
PublikationsstatusVeröffentlicht - 1 Feb. 2021
Extern publiziertJa
VeranstaltungInternational Congress of Applications of Lasers and Electro-Optics 2020 - Online
Dauer: 19 Okt. 202022 Okt. 2020
Konferenznummer: 39

Abstract

This paper describes the research conducted on the automation for a UV laser-based surface pretreatment of fiber-reinforced composites in order to improve adhesive bonding conditions. In a preceding process step, a laser-line-triangulation system gathered inline information on a composite part's surface like topology and location of surface contaminants. These data are the basis for an automation of the laser-based surface treatment [J. Weiland, B. Kunze, H. Dittmar, B. Marx, A. Schiebahn, P. Jaeschke, L. Overmeyer, and U. Reisgen, Proc. Inst. Mech. Eng. Part E: J. Process Mech. Eng. 234, 1-10 (2020)]. The gathered data describe the position of bonding areas and surface contaminants and are converted into relative coordinates of the laser's scanning field. During the following laser process, the bonding area is ablated to improve adhesive bonding conditions. The process is monitored online by a broad bandwidth spectrometer covering the range of λ = 200-1100 nm to detect changes in the surface composition. If the spectrometer detects signals related to specific surface contaminants during the laser process, the position of the contamination is logged. In this case, only the areas that showed traces of surface contaminations are laser treated again until the spectrometer stops detecting the contaminant signature. This work presents results of two series of experiments. During the first series of experiments, the spectrometer monitored a UV laser process on a carbon fiber reinforced epoxy. The laser processing was performed on a clean and contaminated surface. An industry standard release agent contaminated the plastic surface. The spectrometer detected differences between the clean and contaminated surface that will be used for an automatic process control. In a second series of experiments, the authors performed a processing parameter analysis in order to identify a potential process window for laser-based surface pretreatment for glass-fiber reinforced polyamide 6. Contact angle analysis, surface roughness measurements, peel strength, and shear strength tests were performed. The results show that an inline controlled laser process is robustly able to pretreat composite surfaces based on spectrometric measurements.

ASJC Scopus Sachgebiete

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Individualized and controlled laser beam pretreatment process for adhesive bonding of fiber-reinforced plastics. II. Automatic laser process control by spectrometry. / Dittmar, Hagen; Weiland, Josef; Wippo, Verena et al.
in: Journal of laser applications, Jahrgang 33, Nr. 1, 0000301, 01.02.2021.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Dittmar H, Weiland J, Wippo V, Schiebahn A, Jaeschke P, Kaierle S et al. Individualized and controlled laser beam pretreatment process for adhesive bonding of fiber-reinforced plastics. II. Automatic laser process control by spectrometry. Journal of laser applications. 2021 Feb 1;33(1):0000301. Epub 2020 Dez 17. doi: 10.2351/7.0000301
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title = "Individualized and controlled laser beam pretreatment process for adhesive bonding of fiber-reinforced plastics. II. Automatic laser process control by spectrometry",
abstract = "This paper describes the research conducted on the automation for a UV laser-based surface pretreatment of fiber-reinforced composites in order to improve adhesive bonding conditions. In a preceding process step, a laser-line-triangulation system gathered inline information on a composite part's surface like topology and location of surface contaminants. These data are the basis for an automation of the laser-based surface treatment [J. Weiland, B. Kunze, H. Dittmar, B. Marx, A. Schiebahn, P. Jaeschke, L. Overmeyer, and U. Reisgen, Proc. Inst. Mech. Eng. Part E: J. Process Mech. Eng. 234, 1-10 (2020)]. The gathered data describe the position of bonding areas and surface contaminants and are converted into relative coordinates of the laser's scanning field. During the following laser process, the bonding area is ablated to improve adhesive bonding conditions. The process is monitored online by a broad bandwidth spectrometer covering the range of λ = 200-1100 nm to detect changes in the surface composition. If the spectrometer detects signals related to specific surface contaminants during the laser process, the position of the contamination is logged. In this case, only the areas that showed traces of surface contaminations are laser treated again until the spectrometer stops detecting the contaminant signature. This work presents results of two series of experiments. During the first series of experiments, the spectrometer monitored a UV laser process on a carbon fiber reinforced epoxy. The laser processing was performed on a clean and contaminated surface. An industry standard release agent contaminated the plastic surface. The spectrometer detected differences between the clean and contaminated surface that will be used for an automatic process control. In a second series of experiments, the authors performed a processing parameter analysis in order to identify a potential process window for laser-based surface pretreatment for glass-fiber reinforced polyamide 6. Contact angle analysis, surface roughness measurements, peel strength, and shear strength tests were performed. The results show that an inline controlled laser process is robustly able to pretreat composite surfaces based on spectrometric measurements.",
author = "Hagen Dittmar and Josef Weiland and Verena Wippo and Alexander Schiebahn and Peter Jaeschke and Stefan Kaierle and Uwe Reisgen and Ludger Overmeyer",
note = "Funding Information: The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The IGF-project 19727, “Prozessbeobachtung und -regelung der Klebvorbereitung PUR-und thermoplastbasierter, faserverst{\"a}rkter Kunststoffe mittels Laser—ProKleb” of the research association “DVS German Welding Society” is funded within the framework of the industrial collective research program (IGF) by the Federal Ministry for Economic Affairs and Energy on the basis of a decision by the German Bundestag. The authors would like to express their gratitude toward Coherent, Inc. and C. Meyer for providing the AVIA NX used in the experiments. They also thank O. Lischtschenko at Ocean Optics BV for his continuous support.; International Congress of Applications of Lasers and Electro-Optics 2020, ICALEO 2020 ; Conference date: 19-10-2020 Through 22-10-2020",
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publisher = "Laser Institute of America",
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T1 - Individualized and controlled laser beam pretreatment process for adhesive bonding of fiber-reinforced plastics. II. Automatic laser process control by spectrometry

AU - Dittmar, Hagen

AU - Weiland, Josef

AU - Wippo, Verena

AU - Schiebahn, Alexander

AU - Jaeschke, Peter

AU - Kaierle, Stefan

AU - Reisgen, Uwe

AU - Overmeyer, Ludger

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