ThinKing May - The counter-drilling revolution – using a new method, stack materials can be drilled without damaging the layers and with less wear on tools



Mechanical processing is a key factor for the industrial implementation of fiber reinforced plastics, particularly in hybrid lightweighting applications. A huge challenge in drilling CFP/titanium stacks has typically been the rapid wear of the processing tools. The Fraunhofer IPA in Germany has developed a new tool and processing concept for rivet hole drilling. The innovation: counter-drilling.

By using an innovative tool design, the Fraunhofer IPA has developed a process to simplify the material processing and increase the work life of the tools over the current industry standards. The process is based on a radially adjustable drilling tool which can drill through high-tech aerospace materials centrally in the drilling direction and drill through off-center from the opposing direction.