CAM-NC-Datenkette für die Laserbearbeitung von Freiformflächen mit simultaner Bewegung mechanischer Achsen und galvanometrischem Laserscanner

Galvanometric laser scanners enable a high process speed for laser material processing. However, they have a limited working volume and must be combined with a mechanical axis system for 3D processing. For micro-surface processing (e.g. laser polishing, laser structuring) a laser scanner is combined with a 5-axis machine tool to process free-form surfaces with high dynamics and precision. So far, no method is known in which a simultaneous movement of these two systems is realized with high precision. This means that processing without interruption is not possible, which has a negative effect on the surface quality during laser polishing and increases non-productive times during laser structuring by repeatedly positioning the workpiece relative to the laser scanner. The aim of this work is the development of a continuous CAM-NC data chain, in which such a simultaneous processing is possible. The distribution of the movement to both systems takes place via a filter algorithm. In order to decouple the NC program from the workpiece position and kinematics, a CAM programming in workpiece coordinates is realized by integrating a sixth virtual axis into the machine tool. For the example of laser polishing, the entire data chain is tested in industrial applications using the software that has been developed for path planning and control