Laser Trepanning of Stainless Steel

To exploit the advantages of laser technology for micro machining, versatile trepanning systems based on rotating optics have been designed and implemented by LMTB. The advanced trepanning systems enable the controlled adjustment of beam displacement and inclination during operation to drill through-holes with arbitrary geometry. With a patented measuring device, the angular position of the rotating optics is determined online. This paper outlines the development steps and advanced performance, accenting laser micro machining of up to 1 mm thick metal. It discusses also the feasibility of different tapered through holes with an entrance diameter in the range of 65 to 1000 μm.