Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Basic investigations on the contact state between tool and workpiece of forming processes considering tribological aspects

Datum: 19.04.2010



  • Prof. Dr.-Ing. habil. M. Merklein
  • Prof. Dr.-Ing. A.E. Tekkaya (TU Dortmund)
  • Prof. i.R. Dr.-Ing. Dr.-Ing. E.h. mult. Dr. h.c. mult. M. Geiger

Friction in metal forming processes is mainly influenced by the contact state between tool and workpiece. Thus, the scope of this work was the basic characterisation of the contact state at boundary lubrication conditions and the influence of different lubricants. It has been shown by flattening experiments of physical models of asperities that a second order roughness emerges within the real contact area. This second order roughness leads in conjunction with specific lubricants to a different flattening behaviour. These mechanisms have been found indirectly during flattening experiments of technical surfaces as well. These findings represent the basis for a variety of industry relevant topics like the improvement of physically motivated friction models for numerical process simulation or the design of tailored surfaces for a specific adjustment of friction.