Title: Multi-response optimisation of machining parameters during candlestick drilling composite material using membership function and Taguchi method

Authors: Chung Chen Tsao

Addresses: Department of Mechatronic Engineering, Tahua University of Science and Technology, Hsinchu, 30740, Taiwan

Abstract: In this study, the effectiveness of the proposed approach is demonstrated through combined both membership function (MF) and Taguchi method to optimise the machining parameters with multiple performance characteristics in drilling carbon fibre-reinforced plastic (CFRP) by the candlestick drill bits. The MF with multiple performance characteristics (delamination factor and surface roughness) indicate that the feed rate and the spindle speed are the most important factors in drilling CFRP laminates. Confirmation results show that the optimal process parameters in drilling the CFRP laminates can be determined effectively, the delamination factor is decreased from 1.152 to 1.137 (mm/mm), and the surface roughness is decreased from 0.75 to 0.52 (Ra), respectively, leading to a multiple performance characteristics in drilling qualities through combined both MF and Taguchi method.

Keywords: membership function; Taguchi methods; delamination factor; surface roughness; surface quality; multi-response optimisation; machining parameters; candlestick drilling; composite materials; carbon fibre reinforced plastics; CFRP composites; feed rate; spindle speed.

DOI: 10.1504/IJSURFSE.2015.068235

International Journal of Surface Science and Engineering, 2015 Vol.9 No.2/3, pp.189 - 200

Received: 15 Nov 2013
Accepted: 21 Apr 2014

Published online: 26 Mar 2015 *

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