Abstract

One of the first unconventional methods of manufacturing is electrical discharge machining (EDM) which has found its application in modern industries because of its obvious advantages over the conventional machining processes. EDM performance mostly depends on material of electrode selected and process parameters like peak current, pulse-off duration, Pulse-on duration and some others. Hence it is very important to select electrode materials and adequate process parameters to get the required output. Copper tungsten (CuW) is used when fine surface finish is required. CuW combines copper’s (Cu) good electrical and thermal properties with higher melting temperature of tungsten (W). The purpose of this study is to evaluate the research that has been done in order to identify the most important process factors when machining with copper tungsten electrodes. It was concluded that output parameters such as Material removal rate, Tool wear ratio and surface finish highly depend on the optimization of combination of electrode too material and input parameters. A single input set cannot be defined for the optimization of all three output parameters. It was also concluded that all possible compositions of copper and tungsten should be explored in order to determine the best combination for required output.

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