An important component in todays aero-engines are the turbines, so called BLISKs (short for bladed disks). Because of current high quality standards in air traffic safety, those BLISKs need to be checked visually and manually for defects by specialists for several hours. The discovered defects then are measured down to micrometer scale to obtain a quantitative description. In the european research program »Clean Sky«the Fraunhofer ITWM in corporation with Hexagon Technology Center (Heerbrugg, Schweiz) developed an intregrated and fully automated solution for the surface inspection and measurement of BLISKs. In this project we wanted to further improve safety in aviation.
First the geometry of the BLISK has to be measured with a Coordinate Measurement Machine (CMM). This is done by Hexagon in Wetzlar. In combination with the CAD-Model, this step provides all information about the actual shape and geometry of the BLISK and gives us information about possible deviations from desired values.