Title: Modelling and optimisation of process parameters of electrical discharge diamond drilling of nimonic alloy - an aerospace material

Authors: Umacharan Singh Yadav; Vinod Yadava

Addresses: Directorate General of Aeronautical Quality Assurance, Ministry of Defense, New Delhi, India; IET Campus, Dr. A.P.J. Abdul Kalam Technical University, Sitapur Road, Lucknow, Uttar Pradesh, India (formerly Uttar Pradesh technical University, Lucknow, India) ' Mechanical Engineering Department, Motilal Nehru National Institute of Technology Allahabad, Allahabad, Uttar Pradesh, India

Abstract: This paper describes the development of a new process termed as electro-discharge diamond drilling (EDDD) for making the holes in difficult-to-cut aerospace materials and validated with the newly developed hybrid approach of models for material removal rate (MRR), average surface roughness (Ra), and average circularity (Ca). The developed model consist of Taguchi methodology (TM) coupled with response surface methodology (RSM) and has been termed as TMRSM. The model correlates the effects of interactions as well as of higher order of considered input parameters of tool electrode rpm, gap current, pulse-on time and duty factor. Thereafter, multi-objective optimisation (MOO) of the EDDD parameters has been done with the combination of grey relational analysis (GRA) and principal component analysis (PCA) methodology and termed it as GRAPCA. The used hybrid EDDD process of machining along with using the hybrid approach of TMRSM as well as GRAPCA methodology for modelling and MOO is successful.

Keywords: electrical discharge machining; electrical discharge diamond drilling; grey relational analysis; principal component analysis; PCA; response surface methodology; RSM; Taguchi methodology.

DOI: 10.1504/IJISE.2018.094270

International Journal of Industrial and Systems Engineering, 2018 Vol.29 No.4, pp.507 - 532

Accepted: 09 Aug 2016
Published online: 26 Aug 2018 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article