Düsseldorf, Germany — You may recall the legend of Damocles and the sword that hung over his throne.
Now picture that sword being hung from a bit of plastic glued to metal. Or, as Fraunhofer Institut might prefer, an advanced technology bonding of thermoplastics to metal.
But rather than imagining it, visitors could swing by Aachen, Germany-based Fraunhofer's booth during K 2016 in Düsseldorf in the special Science Campus area at K 2016 and see a new take on it, featuring a 60-kilogram anvil and advanced bonding.
Fraunhofer's ILT institute achieves high bond strength through firstly creating a microstructure on the metal surface by laser, which forms hollow undercuts and a rough surface, so the plastic material, melted by laser penetration welding, can be more firmly anchored.
Alexander Olowinsky, ILT microjoining group leader, said the microstructures are applied “at high speed” in width of 30 to 100 µm.
ILT started working on a project called FlexHyJoin a year ago, aimed at fully automatic PMJoin production.
Carbon-fiber reinforced plastic (CFRP) bonding is the subject of ILT work in the HyBriLight project, which refers photonic tools use for a process chain for cost-effective hybrid lightweight construction with highly productive laser systems.