Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Process modeling and technological development of laser beam caving



Datum: 18.03.1999


Author


Reporter

  • Prof. Dr.-Ing. Dr.h.c. M. Geiger
  • Prof. Dr.-Ing. H. Hügel, Stuttgart

It was the aim of this study to improve the technological potential of laser beam caving for the fast production of moulds and dies. Three main possibilities were chosen in order to reach this goal, which are the separate optimization of laser chip removal and laser melt ablation or a combination of both. The latter consists of the improval of both mechanisms in a roughening and finishing procedure. First, a profound process knowledge of both ablation mechanisms had to be established. This process model enabled technological methods for further process enhancement, which have been verified experimentally. On the one hand laser chip removal is strictly confined as far as the ablation rate is concerned. Laser melt ablation, on the other, was qualified according to the aims by the application of a especially developed gas nozzle system. Furthermore, a completely new method for process stabilization was introduced by the fast focus oscillation, which is interesting for both the basic research work, as well as for the surface structuring for tribological applications.