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The Effect of The Variation of Tool End Geometry on Material Removal Mechanisms in Nanomachining

Oluwajobi, Akinjide O. and Chen, X. (2012) The Effect of The Variation of Tool End Geometry on Material Removal Mechanisms in Nanomachining. In: 13th International Conference on Tools, ICT-2012, 27 – 28 March 2012, Miskolc, Hungary.

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    Abstract

    The selection of effective and optimal machining parameters is a major challenge for the
    manufacturing industries. The tool-work interactions may be affected by many process parameters
    including depth of cut, cutting speed, feed rate, cutting tool geometry et cetera. Proper selection of
    these parameters is critical in material removal processes. The effect of different geometric end
    shapes on the phenomena of rubbing and ploughing in nanomachining was investigated by using the
    Molecular Dynamics (MD) simulations. The shapes used were flat, pointed, spherical and trapezoidal.
    The tools in increasing order of sharpness are the following, namely; the tool with the flat end (least
    sharp), the tool with the spherical end, the tool with the trapezoidal end and the tool with the pointed
    end (sharpest). The tools show the initiation of ploughing in that order. The tool with the flat end
    geometry shows a fast initiation of ploughing, because it has the largest surface area to engage more
    atoms. The total energy is lowest for the tool with the pointed end and highest for the tool with the flat
    end. All the tools clearly show the phenomena of rubbing and ploughing in the depth of cut range of
    0.05 to 0.5 nm. The tool with the pointed end has the lowest average cutting force and the tool with the
    flat end has the highest average cutting force. It is important to note that in nanomachining the tool
    with sharpest end may not necessarily cause the greatest material removal! The different tool ends
    may be suitable for different semiconductor and metal machining applications.

    Item Type: Conference or Workshop Item (Paper)
    Subjects: T Technology > TJ Mechanical engineering and machinery
    Schools: School of Computing and Engineering
    School of Computing and Engineering > Centre for Precision Technologies > Advanced Machining Technology Group
    Related URLs:
    Depositing User: Jide Oluwajobi
    Date Deposited: 15 May 2012 14:59
    Last Modified: 04 Jun 2013 14:55
    URI: http://eprints.hud.ac.uk/id/eprint/13409

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