Evaluation of the characteristics of the microelectrical discharge machining process using response surface methodology based on the central composite design

Y. C. Lin, C. C. Tsao, C. Y. Hsu, Shao-Kang Hung, D. C. Wen*

*Corresponding author for this work

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

Evaluation of the characteristics of a micro-electrical discharge machining (Micro-EDM) process is challenging, because it involves complex, interrelated relationships so a proper modeling approach is necessary to clearly identify the crucial machining variables and their interrelationships in order to initiate more effective strategies to improve Micro-EDM qualities (electrode wear (EW), material removal rate (MRR) and overcut). This paper uses a response surface method (RSM) based on the central composite design (CCD) for Micro-EDM problems with four EDM variables (peak current, pulse on-time, pulse off-time and electrode rotation speed). Experimental results indicate that peak current is the EDM variable that most affects the Micro-EDM qualities for SK3 carbon tool steel while pulse off-time had a significant interaction with that. The results show that RSM based on the CCD could efficiently be applied for the modeling of Micro-EDM qualities (EW, MRR, and overcut), and it is an economical way to obtain the performance characteristics of Micro-EDM process parameters with the fewest experimental data.

Original languageEnglish
Pages (from-to)1013-1021
Number of pages9
JournalInternational Journal of Advanced Manufacturing Technology
Volume62
Issue number9-12
DOIs
StatePublished - 1 Oct 2012

Keywords

  • Central composite design
  • Electrode wear
  • Material removal rate
  • Microelectrical discharge machining
  • Overcut
  • Response surface method

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