Abstract
Electric discharge machining (EDM) is a well-established machining process which has its applications in diverse fields of medical, defense, automobile and aerospace engineering. However, EDM being a thermal process provides poor surface quality limits its area of applications. Powder mixed electric discharge machining (PMEDM) is a process variant of EDM, which is obtained by adding powder into dielectric fluid. In the present investigation, a finite element model has been developed for the single spark of PMEDM process. The temperature distribution in Al-SiC metal matrix composite (MMC) was evaluated. This model has further been utilized to calculate the material removal rate (MRR) for multi-discharge by accounting the number of pulses. For validation, further experiments were carried out on Al-SiC MMC under same process parametric conditions as in the finite element model. The result shows a good agreement between the simulation results and experimental data.
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