Performance improvement on WEDMof O2 steel through desirability approach

Document Type : Primary Research paper


Assistant Professor, Department of Automobile Engineering, Nehru Institute of Technology, Coimbatore


Wire Electrical discharge machining is a
popular advanced machining method of cutting,
shaping materials that conducts electricity. Since it
involves thermo-electrical mechanism of material
removal and the number of controlling process
parameters are many, it is recognized as a stochastic
process. WEDM is environmentally safe, user
friendly and easy to automate. O2 steel, a cold
worked, difficult to machine material due to its
toughness, wear resistance and high strength at
elevated temperatures is used in making
mechanical press-tool, drawing dies and punches.
In this work the machining performance of O2 steel
is improved with multi-response criteria based on
the desirability approach. Experimental tests were
carried out through a L16 orthogonal array design, at
four levels. The influence of input factors, spark
duration, off time, wire speed and gap voltage were
analyzed on the performances of surface roughness
and material removal rate. The optimum cutting
conditions are obtained by desirability function
approach. Analysis of variance is applied to sort the
effect from pooled data. A regression model was
developed for surface roughness and material
removal rate. Confirmation experiment was carried
out for the recommended optimal machining
parameters. Good improvements were obtained.


Volume 12, Issue 1
International virtual conference on Newer Trends and Innovation in Nanotechnology Materials Science . Science and Technology
March 2021
Pages 669-674