Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Thermally assisted forming of aluminum sheets



Datum: 13.12.2016


Author

  • Dr.-Ing. Alexander Kahrimanidis

Reporter

  • Prof. Dr.-Ing. habil. M. Merklein
  • Prod. Dr.-Ing. habil. O. Keßler

The formability of aluminum alloys must be considered as limited, especially in comparison to steels. A promising approach to enhance the forming limits of 6xxx-aluminium is the use of a technology called Tailor Heat Treated Blanks (THTB). Thereby, the mechanical properties of a blank are adjusted by a local, short-term heat treatment to generate an optimal distribution of strength for the subsequent forming stages.

Within this work, the framework for a technology transfer of THTB to industrial aplications was developed. One main focus was the investigation of different heating technologies and process chains with THTB. Another priority was the developement of a material model for forming simulation. Furthermore, the conditions were investigated under which the formation of stretcher strain marks at the materials surface can be avoided. Afterwards all results were validated by forming experiments with THTB producing outer panel car body parts. The results of this work provide the foundation for using the THTB technology to produce arbitrary component geometries.