Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Hybrid laser plastic welding



Datum: 19.07.2006


Author

  • Dr.-Ing. Alexander Hofmann

Reporter

  • Prof. Dr.-Ing. Dr.-Ing. E.h. mult. Dr.h.c. M. Geiger
  • Prof. Dr.-Ing. E. Schmachtenberg

Laser transmission welding of plastics is industrially employed since the mid 90?s driven by the development and the related cost-efficiency of laser systems. The use of this welding method was limited to small and simply shaped welding contours up to now due to its poor gap-bridging ability. A hybrid welding method for polymers employing laser radiation as well as radiation emitted by halogen lamps has been developed based on the conventional contour transmission welding method. Such a hybrid welding system has been implemented in order to carry out studies of the new process. The effects of the hybrid irradiation on the seam strength, the gapbridging ability and the formation of residual stresses have been investigated. The observed modifications have additionally been analysed by means of a thermal finiteelement simulation. Enhancing the conventional laser transmission welding process by the hybrid variant, welding large and complexly shaped products shall become feasible now.