Advances in Production Engineering & Management
Volume 8 | Number 4 | December 2013 | pp 219–230
http://dx.doi.org/10.14743/apem2013.4.169
Optimization of multiple quality characteristics of EDM process for MRR and TWR using utility concept
Malhotra, N.
ABSTRACT AND REFERENCES (PDF) |
FULL ARTICLE TEXT (PDF)
A B S T R A C T
Electrical discharge machining (EDM) researchers have explored a number of
ways to improve the material removal rate (MRR) in order to meet the industrial
need for fulfilling market demand. Tool wear rate (TWR) is also one of the
important performance measures in EDM amongst other measures such as
metal removal rate and surface roughness. In most EDM operations, the contribution
of the tool cost to the operational costs is more than 70 %. As a consequence,
the wear of the tool should be carefully taken into consideration
when planning and designing EDM operations. Despite a range of different
approaches, this new research shares the same objective of achieving more
efficient material removal coupled with a simultaneous reduction in tool wear.
This study reports on an investigation into the optimization of the die sink
EDM process on EN31 die steel. Taguchi’s method with multiple performance
characteristics has been adopted to obtain an overall utility value that represents
the overall performance of die sink EDM. The six input parameters are
optimized by considering multi-performance characteristics including MRR
and TWR. The predicted optimal values for MRR and TWR obtained for die sink
EDM are 0.2421 g/min and 0.0087 g/min, respectively. The results were verified
by conducting confirmation experiments.
A R T I C L E I N F O
Keywords • Electrical discharge machining, Taguchi method, Utility concept, Optimization
Corresponding author • Malhotra, N.
Article history • Received 2 May 2013, Revised 13 November 2013, Accepted 25 November 2013
Published on-line • 5 December 2013
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