Comparison of electrode wear rate and surface morphology in electrical discharge machining when using RBD palm oil and kerosene as dielectric fluid

In machining industry, it is desirable that a maximum material removal rate (MRR) can be achieved to meet industrial requirements. Dielectric fluid is considered as one of the factors that can affect the performance of electrical discharge machining (EDM). However, the sustainability of EDM is quest...

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Bibliographic Details
Main Authors: Supawi, Aiman, Ahmad, Said, Joharudin, Nurul Farahin Mohd, Karim, Fazida
Format: Conference Proceeding
Language:English
Subjects:
Bleaching
Chromium molybdenum vanadium steels
Copper
Dielectrics
EDM electrodes
Electric discharge machining
Electrodes
Kerosene
Material removal rate (machining)
Morphology
Palm oil
Pulse duration
Sustainability
Tool steels
Tool wear
Vegetable oils
Wear rate
Workpieces
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Summary:In machining industry, it is desirable that a maximum material removal rate (MRR) can be achieved to meet industrial requirements. Dielectric fluid is considered as one of the factors that can affect the performance of electrical discharge machining (EDM). However, the sustainability of EDM is questioned if the conventional dielectric fluid used is harmful to the environment and human being due to its toxic emissions. One way to maintain EDM’s sustainability is to use vegetable oil as dielectric fluid to address the concerns as vegetable oil is known for its environmentally friendly and biodegradability. This study compares the performance of refined bleached and deodorized (RBD) palm oil with kerosene using AISI D2 steel as a workpiece and copper as an electrode. Peak current, Ip 6A to 12A and pulse duration, ton up to 150 µs were chosen as main parameters. Scanning electron microscopy (SEM) was used to analyze the surface morphology of Cu electrode and the migration of the workpiece material elements to the tool electrode. The lowest electrode wear rate (EWR) for RBD palm oil is 3.60x10-4 mm3/min, while kerosene is 2.01 x10-4 mm3/min at the same IP=6A and ton=150 µs. It can be concluded that the deposited materials on the surface of the tool electrode are factors contributing to the reduction of EWR. This study has shown that RBD palm oil gives identical results as kerosene in the electrode wear rate and surface morphology of the Cu electrode.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0120871