Title: Multicharacteristic optimisation of CNC turned parts using principal component analysis

Authors: Aman Aggarwal, Hari Singh, Pradeep Kumar, Manmohan Singh

Addresses: Department of Mechanical and Automation Engineering, Maharaja Agrasen Institute of Technology, Sector-22, Rohini, Delhi-110085, India. ' Department of Mechanical Engineering, National Institute of Technology, Kurukshetra-136119, India. ' Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee-247267, India. ' Solid State Physics Lab, DRDO, Delhi, India

Abstract: This paper optimises the multiple characteristics (tool life, cutting force, surface roughness and power consumption) in CNC turning of AISI P-20 tool steel using Principal Component Analysis (PCA). Five controllable factors of the turning process were studied at three levels each viz cutting speed, feed, depth of cut, nose radius and cutting environment. L27 Orthogonal array was used for conducting the experiments. The single response optimisation was conducted by Taguchi method. PCA was employed to correspond to multi response cases. The optimum combination of process factors based on first principal component was determined which was subsequently studied by extracting more then one principal component and integrating into comprehensive index. Finally, the Analysis of Variance (ANOVA) was used to find out the most influential CNC turned parameter for multiple response problems.

Keywords: CNC turning; cryogenic machining; AISI P-20 tool steel; multiresponse optimisation; Taguchi method; principal component analysis; PCA; tool life; cutting force; surface roughness; power consumption; cutting speed; feed; depth of cut; nose radius.

DOI: 10.1504/IJMMM.2008.017634

International Journal of Machining and Machinability of Materials, 2008 Vol.3 No.1/2, pp.208 - 223

Published online: 23 Mar 2008 *

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