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Optimum cutting strategy for machining of particle reinforced AlMC

: Klocke, F.; Bergs, T.; Kusumah, I.

International Institution for Production Engineering Research -CIRP-, Paris:
CIRP 2nd International Conference on High Performance Cutting 2006. CD-ROM : June 12 - 13, 2006, Vancouver, BC
Vancouver, 2006
8 pp.
International Conference on High Performance Cutting <2, 2006, Vancouver>
Conference Paper
Fraunhofer IPT ()
spanende Bearbeitung; partikelverstärkter Verbundwerkstoff; Materialzusammensetzung; Bearbeitungswerkzeug; Verschleißrate; Temperatur; Schnittgeschwindigkeit; Speisegeschwindigkeit; Abrasivverschleiß; Schmelzpunkt; Schmierung; Spanwinkel; Standzeit; Härte

The machining experiments are accomplished exemplarily on the machining of SiC particle reinforced sintered AlMC (Aluminium Matrix Composites). A special emphasis is put thereby on the analysis of the cutting process, whereby in particular the material separation mechanisms are investigated. For a fundamental and comprehensive research of the cutting process the most important influence collective, which arises during the machining, is considered. There are three main influencing factors, namely material composition of AlMC, cutting tool and machining parameter. The main objective is to find the optimum cutting strategy with a high cutting rate and at the same time a low wear rate. As concluded in chapter 3.3. that there is an optimum process temperature during cutting of MMC which is reached by using the right combination of cutting velocity and feed rate. By taking all relevant aspects into account a conclusion for an optimum cutting strategy of particle reinforced AlMC can be taken as the following: Abrasive wear is the most influencing wear mechanism on machining of AlMC; The matrix material aluminium defines the main factor on optimum process temperature, because the melting point of aluminium (660 deg C) is much lower than melting point of SiC particle (2700 deg C). When the material is getting soft the tool wear rate will be decreasing; Increase of SiC particle content will increase the tool wear with the multiplication factor of 2; The best cutting performance is achieved by cutting tool coated with TiAlN and by using minimum quantity lubrication; A big tool nose radius 0,5 mm and rake angle 14 deg lead to a longer tool life. The best cutting parameters are: feed per tooth = 0,1 mm/tooth and cutting velocity = 500 m/min. These parameters are suggested for the gut compromise between the expected high cutting rate and low wear rate.
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