Professor of Mechanical Engineering and Smart Structures, School of Computing Engineering and Mathematics, Western Sydney University, Australia. His research interests cover Industry 4.0, Additive Manufacturing, Advanced Engineering Materials and Structures (Metals and Composites), Multi-scale Modelling of Materials and Structures, Metal Forming and Metal Surface Treatment.
Abstract—Electric discharge drilling (EDD) is a hybrid machining process, which has been assembled with Z axis numerical control electric discharge machining (ZNC-EDM) setup. EDD process is basically a hole making process used for electrical conductive materials such as super alloys, metal matrix composites (MMCs) etc. It is difficult to machine these materials. The present discussion will attempt to highlight the recent developments in the field of drilling of MMCs. In this study, electric discharge drilling has been carried out on MMC. Al based MMC (Al6063/10%SiC) is used as a workpiece material and copper is used as an electrode tool material. Five different electrode geometries viz. conical, solid slotted, hollow, hemispherical and hollow slotted tool have been used for comparative analysis on machining. The effect of input variables such as discharge current, pulse on time, pulse off time, tool speed of the output responses such as material removal rate (MRR) and tool wear rate (TWR) during the machining of MMC were investigated. Some other constant parameters were also used such as flushing pressure, spark gap and voltage gap etc.
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