Laser based joining of glass parts for industrial manufacturing applications is demonstrated. The joining partners are bonded reliably with excellent strength. Best application results are obtained using ultra short pulses with high and changing repetition rate, which is adapted exactly to a good thermal management with low stress. The process is based on multi-photon absorption inside the bottom glass resulting in joint welding by heat accumulation. The comfortable process window is suitable for industrial production requirements. A sensor identifies the location of the joint. The welding speed is fast compared to known ablation processes with USP lasers. An optical contact between the parts is not necessary. The quality of the welding can be evaluated in a non-destructive way. The glass surfaces near the welding process qualify for high laser power utilization because there is no glue involved. The obtained welds can hermetically seal a glass casing. A range of production tools is set up to manufacture parts. The new process enables glass to be used as an engineering material with the necessary flexibility to construct complex unities by utilization of femto second laser welding.
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International Congress on Applications of Lasers & Electro-Optics
October 14–18, 2018
Orlando, FL, USA
ISBN:
978-1-940168-17-3
PROCEEDINGS PAPER
Welding of fused silica with femto second lasers enables new design options
Elke Kaiser;
Elke Kaiser
1
TRUMPF Laser GmbH
, Aichhalder Straße 39, 78713 Schramberg, Germany
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Alexander Killi;
Alexander Killi
1
TRUMPF Laser GmbH
, Aichhalder Straße 39, 78713 Schramberg, Germany
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Alexander Budnicki;
Alexander Budnicki
1
TRUMPF Laser GmbH
, Aichhalder Straße 39, 78713 Schramberg, Germany
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Sebastian Pricking;
Sebastian Pricking
1
TRUMPF Laser GmbH
, Aichhalder Straße 39, 78713 Schramberg, Germany
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Malte Kumkar;
Malte Kumkar
1
TRUMPF Laser GmbH
, Aichhalder Straße 39, 78713 Schramberg, Germany
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Rüdiger Brockmann
Rüdiger Brockmann
2
TRUMPF Laser- und Systemtechnik GmbH
, Johann-Maus-Str. 2, 71254 Ditzingen, Germany
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Published Online:
October 01 2016
Citation
Elke Kaiser, Alexander Killi, Alexander Budnicki, Sebastian Pricking, Malte Kumkar, Rüdiger Brockmann; October 14–18, 2018. "Welding of fused silica with femto second lasers enables new design options." Proceedings of the International Congress on Applications of Lasers & Electro-Optics. ICALEO® 2016: 35th International Congress on Applications of Lasers & Electro-Optics. Orlando, FL, USA. (pp. M905). ASME. https://doi.org/10.2351/1.5118626
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