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PARAMETRIC OPTIMIZATION FOR MRR AND SURFACE ROUGHNESS IN WIRE EDM OF D2 STEEL USING TAGUCHI METHOD


B. Kiran Kumar1* ,A.V.S Ram Prasad2,V. Sridhar3
Page No. 43-52


Abstract

AISI D2 tool steel are the important materials having excellent mechanical properties including
improved wear resistance and are finding extensive applications in many manufacturing industries
for preparing dies and punches. Wire Electro Discharge Machining (WEDM) is an advanced
technique employed to generate intricate shapes when heat treated tool steels are to be machined.
The efficient heat treated AISI D2 tool steel machining involves a proper selection of process
parameters to optimize the performance characteristics including Material Removal Rate (MRR)
and Surface Roughness (Ra). This paper presents an investigation on the effect and optimization of
four different machining parameters on material removal rate (MRR) and Surface Roughness in
WEDM process for AISI D2 tool steel. The experimental studies were conducted under varying
peak current, pulse on time, and pulse off time and servo voltage. Taguchi experimental design
method was employed for choosing the settings of machining parameters for proper conduction of
experiments. The level of importance of each machining parameter on the performance
characteristics is determined by using analysis of variance (ANOVA). It has been found that peak
current and pulse on time are the most significant factors effecting the material removal rate and
surface roughness.
Keywords: Wire Electro Discharge Machining, Taguchi method, Analysis of variance, MRR,
Surface roughness.


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