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In-Situ Process Monitoring during Laser Transmission Welding of PA6-GF30

  • Quasi-simultaneous laser transmission welding is preferably used for packaging sensors and electronics. In order to protect the components from moisture, a hermetic encapsulation is needed. However, local weld seam interruptions cannot be identified with the commonly used set-path monitoring. By using a pyrometer, coaxially integrated into a 3D-scanner, gaps between the joining partners can be allocated on basis of the measured temperature. However, the scattering of the heat radiation, especially caused by the fiber reinforcement of the plastics, leads to a reduction of the accessible heat radiation, which makes the identification of gaps considerably more difficult. The herein used experimental setup is characterized by a small detection spot and only by a slight weakening of the heat radiation inside the scanner. Hence, for welding PA6-GF30, the detection of small sized gaps is possible, even if a glass fiber content of 30 percent (wt.) and a weld seam width with approximately 1 mm are given.

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Metadaten
Author:Anton Schmailzl, Benjamin Quandt, Michael Schmidt, Stefan HierlGND
DOI:https://doi.org/10.1016/j.procir.2018.08.131
Parent Title (English):Procedia CIRP
Document Type:conference proceeding (article)
Language:English
Year of first Publication:2018
Release Date:2021/02/09
Volume:74
First Page:524
Last Page:527
Konferenzangabe:10th CIRP Conference on Photonic Technologies [LANE 2018]
Institutes:Fakultät Maschinenbau
Fakultät Maschinenbau / Labor Laser-Materialbearbeitung (LMP)
Begutachtungsstatus:peer-reviewed
OpenAccess Publikationsweg:Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium
research focus:Produktion und Systeme
Licence (German):Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International