Indian Journal of Science and Technology
Year: 2010, Volume: 3, Issue: 4, Pages: 369-373
Vishal Parashar, A. Rehman, J.L. Bhagoria, Y.M. Puri1*
Department of Mechanical Engineering, Maulana Azad National Institute of Technology, Bhopal, M.P., 462051, India
1 Department of Mechanical Engineering, Vishweshvariya, National Institute of Technology, Nagpur, Maharashtra, India
In this paper, statistical and regression analysis of kerf width using design of experiments is proposed for WEDM operations. Experimentation was planned as per Taguchi’s L’32 (21 X 44 ) mixed orthogonal array. Each experiment has been performed under different cutting conditions of gap voltage, pulse ON time, pulse OFF time, wire feed and dielectric flushing pressure. Stainless steel grade 304L was selected as a work material to conduct the experiments. From experimental results, the kerf width was determined for each machining performance criteria. Analysis of variance (ANOVA) technique was used to find out the variables affecting the kerf width. Assumptions of ANOVA were discussed and carefully examined using analysis of residuals. Variation of the kerf width with machining parameters was mathematically modeled by using the regression analysis method. Finally, the developed model was validated with a new set of experimental data and appeared to be satisfactory.
Keywords: Kerf width, Taguchi method, ANOVA, WEDM.
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