Title: Analysis and optimisation of machining parameters in micro turning using RSM

Authors: S. Selvakumar; R. Ravi Kumar; K. Ganesan

Addresses: Faculty of Mechanical Engineering, Roever Engineering College, Elambalur, Perambalur, Tamilnadu, India ' Department of Mechanical Engineering, CMS College of Engineering, Ernapuram, Namakkal-637 003, Tamilnadu, India ' Department of Mechanical Engineering, PSG College of Technology, Coimbatore, 641004, Tamilnadu, India

Abstract: Miniaturisation of industrial products has been the trend of technological development for creating smaller and precision components which plays an important role in today's need. Titanium alloy Gr.2 is one of the most extensively used Ti alloys for high temperature application components, because of its low weight and high strength even at elevated temperatures for applications like aerospace gas turbine compartments. In this paper, the performance of micro turning of titanium alloy with cermet insert is investigated using response surface methodology and Box-Behnken design (BBD). Two empirical models have been developed for predicting the tool wear and surface roughness. The analysis reveals that the cutting speed and feed rate are more influencing parameters on responses. The optimisation results showed that the combination of medium spindle speed, feed rate, and high depth of cut are necessary to minimise the tool wear and surface roughness. A verification experiment is conducted and compared.

Keywords: microturning; micromachining; response surface methodology; RSM; titanium alloys; tool wear; surface roughness; surface quality; cermet inserts; Box-Behnken design; BBD; modelling; cutting speed; optimisation; spindle speed; feed rate; depth of cut; turning.

DOI: 10.1504/IJMPT.2015.070098

International Journal of Materials and Product Technology, 2015 Vol.51 No.1, pp.75 - 97

Received: 28 Jun 2014
Accepted: 01 Apr 2015

Published online: 26 Jun 2015 *

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