TY - CHAP A1 - Schkutow, Andreas A1 - Geiger, René A1 - Burgmayr, Wolfgang A1 - Frick, Thomas T1 - Laser direct joining of metal-polymer hybrid connections using a single beam source and processing station T2 - Proceedings of LiM 2023 N2 - Laser direct joining of metals and plastics is a promising process for producing strong and reliable joints for lightweight hybrid structures without the need for adhesives, primers or mechanical fasteners. Commonly this process consists of two separate steps using at least two processing stations: the surface of the metal part is textured to achieve an increased surface roughness and improved mechanical interlock between the components. In another step, the thermoplastic components or the matrix of thermoplastic fiber reinforced composites are selectively heated to allow the melt to flow into the prepared metal structures. In this work, a new method is presented that combines highly efficient laser surface texturing of metallic parts and the selective laser heating of the joining zone in a transmission joining process using a single laser beam source running in different operation modes. This enables a very compact and cost-efficient processing station. KW - Laser direct joining; metal-polymer connections; surface texturing; transmission joining; Y1 - 2023 UR - https://wlt.de/sites/default/files/2023-09/Contribution_256.pdf ER - TY - JOUR A1 - Schkutow, Andreas A1 - Geiger, René A1 - Frick, Thomas A1 - Burgmayr, Wolfgang T1 - Laser direct joining of metals and polymers using modulated cw laser radiation – one beam source for two processes T1 - Laser-Direktfügen von Metallen und Polymeren unter Verwendung modulierter cw-Laserstrahlung – ein Strahlwerkzeug für zwei Prozesse JF - JOINING PLASTICS N2 - Laser direct joining of metals with polymers is based on two main processes: The surface structuring of the metallic joining part and the melting of the thermoplastic joining partner at the interface. Up to now, usually two different beam sources are applied for this purpose. Short pulsed laser radiation is typically applied for surface structuring and continuous wave laser radiation for the transmission joining or heat conduction joining process. In a research project conducted by University of Technology Nuremberg in collaboration with Evosys Laser GmbH, a new approach was developed in which both sub-processes are carried out using a single continuous wave (cw) laser beam source. A very efficient structuring process was realized by using the fast power modulation capabilities of the laser. N2 - Das Laser-Direktfügen von Metallen mit Polymeren beruht auf zwei wesentlichen Teilprozessen: Der Oberflächenstrukturierung des metallischen Fügepartners und dem Aufschmelzen des thermoplastischen Fügepartners an der Grenzfläche. Bisher werden dafür meist zwei verschiedene Werkzeuge verwendet. Kurzgepulste Laserstrahlung für die Oberflächenstrukturierung und kontinuierliche Laserstrahlung für den Fügeprozess. In einem Forschungsvorhaben der Technischen Hochschule Nürnberg mit der Evosys Laser GmbH wurde ein neuer Ansatz entwickelt, bei dem beide Teilprozesse mit derselben cw-Laserstrahlquelle durchgeführt werden, wobei ein besonders effizienter Strukturierprozess durch eine schnelle Leistungsmodulation des Lasers realisiert wurde. (cw: continuous wave; deutsch: ununterbrochene Welle, Dauerstrichlaser) Y1 - 2024 U6 - https://doi.org/10.53192/JP20240122 SN - 1864-3450 VL - 18 IS - 1 SP - 22 EP - 28 PB - DVS Media GmbH CY - Düsseldorf ER -