Effect of Dielectric on Electrical Discharge Machining: A Review

Singh, Ankit; Mahajan, Rahul; Tiwari, Anmol; Kumar, Dheeraj; Ghadai, Ranjan Kumar

doi:10.1088/1757-899x/377/1/012184

Cited by 29 publications

(7 citation statements)

References 19 publications

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“…Mineral oil, EDM oil, and kerosene provide a higher microhardness of the treated specimen than deionized water because of carbide formation. Furthermore, a thicker recast layer has been reported with application of oil-based dielectrics instead of water-based dielectrics, due to having a lower specific heat and higher electrical resistivity, decreasing the machining gap and poor flushing [57,191,193,194].…”

Section: Effect Of Non-electrical Parameters On the Modified Surface Characteristicsmentioning

confidence: 99%

Investigation of Coatings, Corrosion and Wear Characteristics of Machined Biomaterials through Hydroxyapatite Mixed-EDM Process: A Review

et al. 2021

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Together, 316L steel, magnesium-alloy, Ni-Ti, titanium-alloy, and cobalt-alloy are commonly employed biomaterials for biomedical applications due to their excellent mechanical characteristics and resistance to corrosion, even though at times they can be incompatible with the body. This is attributed to their poor biofunction, whereby they tend to release contaminants from their attenuated surfaces. Coating of the surface is therefore required to mitigate the release of contaminants. The coating of biomaterials can be achieved through either physical or chemical deposition techniques. However, a newly developed manufacturing process, known as powder mixed-electro discharge machining (PM-EDM), is enabling these biomaterials to be concurrently machined and coated. Thermoelectrical processes allow the migration and removal of the materials from the machined surface caused by melting and chemical reactions during the machining. Hydroxyapatite powder (HAp), yielding Ca, P, and O, is widely used to form biocompatible coatings. The HAp added-EDM process has been reported to significantly improve the coating properties, corrosion, and wear resistance, and biofunctions of biomaterials. This article extensively explores the current development of bio-coatings and the wear and corrosion characteristics of biomaterials through the HAp mixed-EDM process, including the importance of these for biomaterial performance. This review presents a comparative analysis of machined surface properties using the existing deposition methods and the EDM technique employing HAp. The dominance of the process factors over the performance is discussed thoroughly. This study also discusses challenges and areas for future research.

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Section: Effect Of Non-electrical Parameters On the Modified Surface Characteristicsmentioning

confidence: 99%

Investigation of Coatings, Corrosion and Wear Characteristics of Machined Biomaterials through Hydroxyapatite Mixed-EDM Process: A Review

et al. 2021

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“…the pressure is directly proportional to expectations of both responses (MRR and gas emission) due to high air pressure promotes green machining processes (Dhakar et al 2019;Ming et al 2021). It was also revealed from the literature the dielectric medium is a significant factor in gas emission in EDM processes (Leão and Pashby 2004;Chakraborty et al 2015;Ng et al 2017;Singh et al 2018). In the near-dry WEDM processes, the liquid/ hydrocarbon dielectric fluid has been replaced by air or air mixed with a small amount of water to control the emission.…”

Section: Analysis Of Rermentioning

confidence: 94%

Sustainable Eco-friendly Wire-cut Electrical Discharge Machining: Gas Emission Analysis

Boopathi¹

2021

Preprint

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Wire-cut electrical discharge machining (WEDM) is the highly essential unconventional electro-thermal machining process to cut the contour profile of hard materials in modern production industries. The various environmental impacting wastes (by evaporating and reacting hydro-carbon dielectric fluid) are produced during the WEDM process and these are harmful to the machine operators. These wastes are minimized by a near-dry WEDM process wherein the pressurized air mixed with a small amount of water is used as a dielectric substance. In this research, influences, and contributions of machining parameters such as air pressure, mixing water flow rate, spark current and pulse width on gas emission concentration (GEC), materials removal rate (MRR), and relative emission rate (RER) of sustainable near-dry WEDM process have been optimized by Taguchi analysis. RER is investigated to analyze the effects of machining factors on gas emission and machining rate combinedly. It was revealed that the maximum air pressure and flow rate of mixing water have significantly been promoting the sustainable near-dry WEDM process.

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“…( 1) ∆WT= electrode weight changing during machining (grams) ρT = electrode density (gm/cm 3 ) tm = machining time (second)…”

Section: Electrode Wear Ratiomentioning

confidence: 99%

“…EDM is a thermoelectric machining process use to process conductive and semi conductive materials [1]. Electrical discharge machining (EDM) sinking is one of non-conventional machining process [2].…”

Section: Introductionmentioning

confidence: 99%

Optimization Multi Response on Electrical Discharge Machining Sinking Process Using Taguchi-Grey-Fuzzy Methods

Bisono

Yusron

2020

ijseit

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Electronic Discharge Machining (EDM) sinking applied widely in advance material manufacturing, every process parameter will count on this company. Their performance evaluated by some parameters such as surface roughness and tool wear ratio. Then they will be a dependent variable on this research. Independent variables on this research are electrode polarization, gap voltage, duty factor and pulse current. Every variable has three levels, except electrode polarization has two levels. This research conducting using Taguchi matrix orthogonal L18 (21×33) methods. The aim of this experiment is to evaluate optimization parameter process on EDM sinking, using Taguchi-Grey-Fuzzy methods. Characteristics response optimal applied are ‘smaller better’ for surface response roughness and tool wear ratio. This research using DAC tool steel as work-piece. DAC is most widely used as die for aluminum and zinc die-casting. The aim of this research is finding contribution of variable in EDM sinking parameter. Result of this research show contribution from variable process to reduce variance total observed response simultaneously, in order are electrode polarization on 49,53%, gap voltage on 23,52%, duty factor on 5,45% and pulse current on 9,92%. From validated optimization in confirmation experiment, to conclude combination variable process optimal response value is electrode polarization on positive, gap voltage at 50V, duty factor at 0.5 and pulse current at 12A.

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Effect of Dielectric on Electrical Discharge Machining: A Review

Cited by 29 publications

References 19 publications

Investigation of Coatings, Corrosion and Wear Characteristics of Machined Biomaterials through Hydroxyapatite Mixed-EDM Process: A Review

Investigation of Coatings, Corrosion and Wear Characteristics of Machined Biomaterials through Hydroxyapatite Mixed-EDM Process: A Review

Sustainable Eco-friendly Wire-cut Electrical Discharge Machining: Gas Emission Analysis

Optimization Multi Response on Electrical Discharge Machining Sinking Process Using Taguchi-Grey-Fuzzy Methods

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