Title: Optimisation of machining parameters for single point diamond turning of chromium zirconium copper alloy C18150 using Taguchi and grey relational analysis
Authors: Bhaskar Goel; Sehijpal Singh; Rama Gopal V. Sarepaka
Addresses: GNDEC, Punjab Technical University, Kapurthala, India ' Department of Mechanical Engineering, GNDEC, Ludhiana, Punjab, India ' National Aspheric Facility, CSIR-CSIO, Chandigarh, India
Abstract: In this paper, the results of an experimental study conducted for precision machining of chromium zirconium copper alloy C18150 have been reported. The input parameters include tool overhang, tool nose radius, feed rate, spindle speed and depth of cut. A flat profile is generated on a disc of chromium zirconium copper alloy C18150 with three performance characteristics, surface roughness (Ra), profile error (Pt) and waviness error (Wa). The process parameters are optimised to obtain best surface finish with minimum profile and waviness errors. Taguchi approach coupled with grey relational analysis has been used to determine optimum combination of input process parameters. The best values of surface finish obtained after multi-responses optimisation is 12.4 nm having profile error and Wa of 0.166 µm and 0.071 µm respectively.
Keywords: ultra-precision machining; surface characterisation; diamond tooling; surface roughness; profile error; waviness error; surface quality; optimisation; machining parameters; single point diamond turning; chromium zirconium copper alloys; Taguchi methods; grey relational analysis; GRA; tool overhang; tool nose radius; feed rate; spindle speed; depth of cut.
International Journal of Machining and Machinability of Materials, 2017 Vol.19 No.2, pp.95 - 109
Received: 26 Jun 2015
Accepted: 24 Dec 2015
Published online: 15 Mar 2017 *