1606 Hydrodynamic Lubrication Analysis on Friction Properties at Interface between Textured Rotary Cutting Tool and Chip

Abstract

Rotary cutting has been attracting much attention because of its excellent machining performance due to the efficient supply of lubricant into the cutting point. To clarify the lubrication mechanism for friction reduction between the textured rotary tool and chip, the lubrication analysis on the Reynolds equation and Greenwood-Williamson model was conducted. The experimental and analytical results showed that the surface texturing with deep groove depth over 2μm did not work to generate hydrodynamic pressure, and thus was not effective with any groove angles. On the other hand, the surface texturing with shallow groove depth, around 200nm, worked to generate high hydrodynamic pressure, and was most effective for friction reduction during the cutting process.