Abstract
The foremost aim of Electrical Discharge Machining (EDM) users and manufactures is to obtain a better process stability, maximum productivity, precise and accurate machining of the component with minimum tool wear. For achieving better efficiency in EDM, selection and setting of input parameter is a crucial step. This study investigated the effect of input parameters such as workpiece electrical conductivity, gap current, gap voltage, pulse-on-time and pulse-off-time on the responses namely material removal rate (MRR) and tool wear rate (TWR). Experiments were designed and performed as per the Taguchi’s L18 (61 × 34) array. Taguchi’s approach and utility concept were employed for optimizing conflicting responses. Obtained results showed that the overall utility was significantly affected by gap current, gap voltage, pulse-on-time and pulse-off-time. Thus the obtained optimal values of MRR and TWR are 9.157 mm3/min and 0.128 mm3/min respectively.
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