Influence of duplex tool coatings during friction pressing

Over­view

Friction spinning is an innovative thermomechanical incremental forming process that can be used to produce both simple and complex geometries from tubular or sheet metal semi-finished products. Friction between the rotating workpiece and the tool plays an important role in this process. This results in high temperatures, which increase the formability of the material and at the same time reduce the energy requirement in the process.

A current research focus is on the characterisation of friction in the friction-pressing process by carrying out comprehensive investigations of, among other things, forces and temperatures during friction-pressing in order to better understand the frictional behaviour and the dependence of this behaviour on the test parameters and to enable the optimisation of friction-pressing tools and process strategies. In addition, combined coating systems using PVD and thermal spray processes for the friction-pressing tools will be produced at the Chair of Materials Technology at TU Dortmund University and tested at the LUF in order to improve the heat flow and wear of the tools in particular and ultimately integrate them into optimised process strategies.

Furthermore, the friction-pressing process is to be modelled numerically in order to make a defined statement about the most important process influencing variables in advance. These findings save time, costs and effort and enable an optimised design of the process.

Fund­ing in­sti­tu­tion

This project is sponsored by the DFG.

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