Title: Effects of tool edge radius and rake angle on ductile machining process of CaF₂

Authors: Mingjun Chen; Wenbin Jiang; Mingquan Li

Addresses: Center for Precision Engineering, Harbin Institute of Technology, Harbin, 150001, China. ' Center for Precision Engineering, Harbin Institute of Technology, Harbin, 150001, China. ' Center for Precision Engineering, Harbin Institute of Technology, Harbin, 150001, China

Abstract: The submicron level orthogonal cutting process of CaF₂ has been investigated by the finite element approach, and the effects of tool edge radius on cutting force, cutting stress and chip formation were investigated. T results indicate that increasing the tool edge radius causes a significant increase in thrust force and a decrease in chip thickness. A hydrostatic pressure (?2 GPa) is generated in the cutting region. The volume of the material under high pressure increases with the edge radius. The effects of tool rake angle on cutting stress and chip formation were also investigated. The results indicate that increasing the tool rake angle causes a significant increase in stress and a decrease in chip thickness. The simulation results from the present study show the optimal tool rake angle to the ultra-precision cutting of CaF₂ is -20

Keywords: CaF2 crystals; tool edge radius; rake angle; ductile machining; FEM; nanotechnology; nanomanufacturing; cutting force; cutting stress; chip formation; finite element method; ultra-precision machining; modelling; simulation.

DOI: 10.1504/IJNM.2011.042476

International Journal of Nanomanufacturing, 2011 Vol.7 No.3/4, pp.350 - 360

Received: 11 Nov 2010
Accepted: 15 Apr 2011
Published online: 07 Mar 2015 *

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