Title: Multi-response optimisation in ultrasonic machining of titanium using Taguchi's approach and utility concept

Authors: Jatinder Kumar, J.S. Khamba

Addresses: Department of Industrial Engineering and Management, National Institute of Technology, Kurukshetra, Haryana, India. ' Department of Mechanical Engineering, University College of Engineering, Punjabi University, Patiala 147004, Punjab, India

Abstract: In this investigation, the effect of several parameters such as abrasive material, slurry grit size, tool material and ultrasonic power rating on the machining performance of Ultrasonic Machining (USM) has been evaluated using pure titanium (ASTM Grade-I) as work material. The machining characteristics that are being investigated are Material Removal Rate (MRR), Tool Wear Rate (TWR) and roughness of the machined surface. The study makes use of experimentation planned and executed as per Taguchi|s robust design methodology. The results obtained have been analysed by using Analysis Of Variance (ANOVA) and relative significance of various factors has been evaluated. The information thus obtained has been used to construct a macro-model for USM of titanium. Multi-response optimisation was performed using Taguchi|s method in conjunction with utility concept for simultaneous optimisation of the machining characteristics. [Received 15 July 2008; Revised 18 March 2009; Accepted 22 August 2009]

Keywords: USM; ultrasonic machining; titanium machining; design of experiments; DOE; Taguchi methods; utility concept; MRR; material removal rate; TWR; tool wear rate; surface roughness; multi-response optimisation; robust design; abrasive material; slurry grit size; tool material; ultrasonic power rating.

DOI: 10.1504/IJMR.2010.031629

International Journal of Manufacturing Research, 2010 Vol.5 No.2, pp.139 - 160

Published online: 15 Feb 2010 *

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