Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Failure prediction in the process simulation of bending and hemming



Datum: 22.04.2014


Author

  • Dr.-Ing. Martin Zubeil

Reporter

  • Prof. Dr.-Ing. habil. M. Merklein
  • Prof. Dr.-Ing. K. Roll

The scope of this workwas the development of a simulation-based method for identifying the process boundaries of bending and hemming techniques. For a basic evaluation of the simulation accuracy, qualitative and quantitative reference features are essential and required for the planned scope of the investigation. For this reason, the mechanical bending properties have been characterized and the failure limit of the used material has been investigated phenomenologically. In order to detect the failure conditions from experimental bending tests with the simulation, a phenomenological failure mo-del was involved in the finite element simulation. The developed model based on the 3-point bending device was the focus of the study to apply the procedure on the process of roller hemming and tabletop hemming. The results of the study have shown, that the applied modelling strategy for developing hemming processes is able to get them efficiently working. Therefore, the possibility is offered to optimize future hemming processes, tools and specific products.