Gap-Bridging during Quasi-Simultaneous Laser Transmission Welding
- Tightness is often the main requirement for quasi-simultaneous laser transmission welds. However, remaining gaps cannot be detected by the used set-path monitoring. By using a pyrometer in combination with a 3D-scanner, weld seam interruptions can be localized precisely while welding, due to temperature deviations along the weld contour. To analyze the temperature signal in correlation to the progress of gap-bridging, T-joint samples with predefined gaps are welded. The set-path is measured synchronously. Additionally, the temperature distribution and the influence of the thermal expansion of the polymers are studied by a thermo-mechanical FEM-process simulation. On top of that, the melt blow-out of the welded samples is analyzed using μCT-measurements. The experiments have shown that closing of a gap can be identified reliably by the temperature signal and that the squeezed melt flow into the gap and the thermal expansion in the gap zone accelerates gap-bridging. Furthermore the inserted heat can be adapted in the fault zone, in order to avoid thermal damage.
Author: | Anton Schmailzl, Stefan HierlGND, Michael Schmidt |
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DOI: | https://doi.org/10.1016/j.phpro.2016.08.113 |
ISSN: | 1875-3892 |
ISSN: | 1875-3884 |
Parent Title (English): | Physics Procedia |
Publisher: | Elsevier |
Place of publication: | Amsterdam [u.a.] |
Editor: | Michael Schmidt |
Document Type: | conference proceeding (article) |
Language: | English |
Year of first Publication: | 2016 |
Release Date: | 2021/02/09 |
Volume: | 83 |
First Page: | 1073 |
Last Page: | 1082 |
Konferenzangabe: | 9th International Conference on Photonic Technologies - LANE 2016, September 19-22, Fürth, Germany |
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): | ![]() |