《Modelling tool wear in cemented-carbide machining alloy 718》.pdf

ARTICLE IN PRESS International Journal of Machine Tools Manufacture 48 (2008) 1072– 1080 Contents lists available at ScienceDirect International Journal of Machine Tools Manufacture journal homepage: /locate/ijmactool Modelling tool wear in cemented-carbide machining alloy 718 ¨ ˚ J. Lorentzon , N. Jarvstrat ¨ Department of Technology, University West, Gustava Melins gata 2, Trollhattan, Sweden a r t i c l e i n f o a b s t r a c t Article history: Tool wear is a problem in turning of nickel-based superalloys, and it is thus of great importance to Received 3 January 2008 understand and quantitatively predict tool wear and tool life. In this paper, an empirical tool wear Received in revised form model has been implemented in a commercial finite element (FE) code to predict tool wear. The tool 28 February 2008 geometry is incrementally updated in the FE chip formation simulation in order to capture the Accepted 2 March 2008 continuous evolution of wear profile as pressure, temperature and relative velocities adapt to the Available online 18 March 2008 change in geometry. Different friction and wear models have been analysed, as well as their impact on Keywords: the predicted wear profile assessed. Analyses have shown that a more advanced friction mode