Vegetable oil based dielectric fluids for electrical discharge Machining Process: Advancements and challenges

Gupta, Vivudh; Singh, Pawandeep; Singh, Brahmjit; Mishra, R. K.

doi:10.1016/j.matpr.2022.03.395

Cited by 1 publication

(1 citation statement)

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“…The dielectric fluid is vital in EDM because it insulates the electrode, provides high pressure to clear the collapsed plasma channel or debris, cools the molten metal, and washes away the solidified particles that have been previously flushed away. Specific types of working fluids are designed for use in some EDM devices [57]. A suitable dielectric fluid must be chosen; however, in certain cases, sinking EDM commonly utilizes mineral lubricants, whereas deionized water is typically used in micro-EDM and wire cut researchers that bio-oils are good candidates as the secondary dielectric fluid [55,56].…”

Section: Edm's Dielectric Fluidmentioning

confidence: 99%

A Review of Electrode Manufacturing Methods for Electrical Discharge Machining: Current Status and Future Perspectives for Surface Alloying

Garba,

Abdul-Rani,

Yunus

et al. 2023

Machines

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In electrical discharge machining (EDM), the tool electrode is one of the substantial components of the system, and it ensures the success or failure of the EDM process. The electrode’s role is to conduct electrical charges and erode the workpiece to the desired shape. Different electrode materials have different impacts on machining. Certain electrode materials remove metal quickly but wear out rapidly, while others degrade slowly but the material removal is too slow. The choice of the electrode has an influence on both the mechanical properties, such as metal removal rate (MRR), wear rate, surface finish, surface modification and machinability, and the electrical properties, such as sparking initiation, time lag, gap contamination and process stability. There are factors to consider when fabricating an electrode, which include the type of workpiece materials, the metallurgical alloying of the materials, the choice of fabrication techniques, the intended use of the electrode, and material cost. Considerable challenges in EDM electrode fabrication have been reported, which include excessive tool wear for green compact electrodes, high toughness for sintered electrodes, and poor rigidity for additively manufactured electrodes. To address these issues, researchers have explored different manufacturing methods, such as casting, conventional machining, electrodeposition, powder metallurgy and additive manufacturing. In this paper, the various techniques attempted and adopted in EDM electrode manufacturing are analyzed and discussed. This paper also sought to give insight into EDM, its various forms, the dielectric fluid’s properties, EDM electrode’s size and shape, the effects of the electrode on the EDM process, material removal, electrode wear, present technologies for electrode fabrication, and the limitations of these technologies. Finally, directions for future research are highlighted.

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Section: Edm's Dielectric Fluidmentioning

confidence: 99%