Miniaturization is a general trend in part manufacturing: the size of the components
and the rate of corresponding
tolerance shrink. This fact makes the appliance of precision-
and micromachining operations required. Mechanical cutting has been successfully adapted
to perform precision machining and microcutting with uncut chip thickness typically
under 0.01 mm. Size effect is dominant in this scale: the amount of specific cutting
energy greatly increases according the type of material deformation occurring at the
cutting edge radius. The multi-sectioned empirical model of specific cutting force
proved to be an effective model to indicate such transient mechanisms. Aim of current
research is to describe the effect of cutting parameters on the known section borders
(called boundary chip thicknesses) in the model of specific cutting force. As a result,
the newly created empirical models involve feed rate and cutting speed as direct input
parameters, and assumption has been made to explain the physical meaning behind boundary
chip thicknesses from the
aspect of material deformation.
