Gap-bridging during quasi-simultaneous laser transmission welding

Schmailzl A, Hierl S, Schmidt M (2016)

Publication Type: Conference contribution

Publication year: 2016


Publisher: Elsevier B.V.

Book Volume: 83

Pages Range: 1073-1082

Conference Proceedings Title: Physics Procedia

Event location: Fürth DE

DOI: 10.1016/j.phpro.2016.08.113


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.

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Schmailzl, A., Hierl, S., & Schmidt, M. (2016). Gap-bridging during quasi-simultaneous laser transmission welding. In Physics Procedia (pp. 1073-1082). Fürth, DE: Elsevier B.V..


Schmailzl, Anton, Stefan Hierl, and Michael Schmidt. "Gap-bridging during quasi-simultaneous laser transmission welding." Proceedings of the 9th International Conference on Photonic Technologies, LANE 2016, Fürth Elsevier B.V., 2016. 1073-1082.

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