Study in Chemnitz. To know what is good.






  • FacebookTwitterYoutube
  • Deutsch

 

CRC 692 - High-strength aluminium based light weight materials for reliable components
Subproject D2:

Generation of predefined surface characteristics by metal cutting finishing of AMCs
Duration:

01/2006 to 12/2013
Link: sfb692.tu-chemnitz.de
Project executing organisation:

Deutsche Forschungsgemeinschaft (German Research Foundation)
Head of the subproject:

Prof. Dr.-Ing. Andreas Schubert
Staff:

Dipl.-Ing. Andreas Nestler
Problem:

Aluminium matrix composites (AMCs) are innovative light weight materials which are intented to be used for reliable components. AMCs consist of a relatively soft aluminium alloy as parent material and hard particles embedded therein. Machining of these materials constitutes an especial challenge. Due to the hardness of embedded particles tools wear out very fast on the one hand, while particles are ripped out of the matrix and leave near-surface holes, which might be initial points for the formation of cracks, on the other.
Goal:

In metal cutting finishing of AMCs the surface is intented to be damaged as little as possible. An approach consists in cutting the hard ceramic particles with a size of only few micrometers without changing their position in the aluminium matrix. This requires the use of especially hard cutting tools. It is necessary to investigate if besides diamond cemented carbides are applicable. Due to the fact that diamond begins to oxidise in the air at a temperature of approximately 600 °C, the investigation into different coolant strategies will be useful in this context.
Apart from the cutting material the cutting part's geometry influences the cutting conditions considerably. The impact of the cutting part's geometry on the process is meant to be analysed and the optimal geometry for machining this special AMC is to be investigated. By means of systematic research on the influence of cutting rate, depth of cut and feed the optimal conditions for machining the developed AMC will be investigated with regard to strengh of the material and economic efficiency of the production.