Document Type : Research Paper


1 Production Engineering and Metallurgy Department, University of Technology - Iraq

2 Production Engineering Dept., University of Technology-Iraq, Alsina’a Street, 10066 Baghdad, Iraq.


Electrical Discharge Machining process (EDM) is a nontraditional metal removal technique that uses thermal energy to erode the workpiece without generating any physical forces of cutting between the tool and the machining part. It is used to cutting of hard and electrical conductivity materials and product intricate shapes of products. The aim of this work is to study the effect of changing voltage values on electrode wear rate (EWR). The machining parameters includes voltage (V), peak current (Ip), pulse duration (Ton) and finally, pulse interval (Toff). The results show that the EWR was increase with rising in voltage, peak current and pulse duration values but when the pulse interval value rises, the electrode wear rate reduce. The best (EWR) value was (0.093507) mm3/min that obtained at voltage (140) V, Ip (12) A, Ton (400) µs and  Toff (12) µs.

Graphical Abstract


  • Using low levels of machining parameters (voltage, Ip and Ton) to achieve low EWR.
  • According to Factorial Design, model fits the data was 97.65% and 97.83% for 140 and 240 V, respectively.
  • Mathematical relationship between the input parameters and EWR has been gained for correlating EWR.


Main Subjects

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