Investigation of biodiesel dielectric in sustainable electrical discharge machining

Ng, Peow.; Kong, Shufeng; Yeo, Song Huat

doi:10.1007/s00170-016-9572-6

Cited by 63 publications

(18 citation statements)

References 10 publications

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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 In the near-dry WEDM processes, the liquid/ hydrocarbon dielectric fluid has been replaced by air or air mixed with a small amount of water to control the emission.…”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%

“…It was analyzed and concluded that dry EDM is an environment and operator-friendly sustainable process (Valaki et al 2015). The sustainable EDM process has been investigated using canola and sunflower Biodiesel to promote clean and emit much less harmful emissions (Ng et al 2017). Generally, the gas-assisted EDM was performed with low performance with a good environmentally supported process.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Analysis Of Rermentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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

Boopathi¹

2021

Preprint

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“…Moreover, 0.20-0.40 m/s range is recommended as most suitable for satisfactory responses. Ng et al [60] performed EDM operation on metallic glass using canola, sunflower, and kerosene as dielectrics and noticed 114-137% more MRR with bio-dielectrics. The increment lies between 12 and 108% when titanium alloy was used as workpiece.…”

Section: Vegetable Oils As Dielectricsmentioning

confidence: 99%

Feasibility assessment of some alternative dielectric mediums for sustainable electrical discharge machining: a review work

Das

Paul

Doloi

2020

J Braz. Soc. Mech. Sci. Eng.

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Low removal rate, high power consumption, and dependency on conventional fuels (kerosene as a dielectric) are some premier issues that keep the sustainability index of EDM low, though it has huge acceptability and popularity mostly in aviation sectors and biomedical instrumentation to machine some extensively hard ferrous and nonferrous metal/metal alloys. Besides these, the thermal agitation inside the fusion/machining zone partially burns the dielectrics and tool-workpiece-metal, which evolve some oxides/monoxides. These evolved gases promote an unhygienic breathing atmosphere, which is very much harmful to the operator's health. Sometimes because of inadequate flushing pressure and velocity, carbon particles deposited inside the crater makes the spark unstable and releases carbon monoxide when the temperature exceeds its melting point. According to ISO 14000, every manufacturing process must be comprised of the sustainability criteria, which maintains a compromised balance between the economic, environmental, and social aspects, including the issue of the operator's health. But in real practices, it is very tough to maintain a stoichiometric balance between all these constraints. The article intensely focuses on the issue of emergence of gases during machining and tries to promote the utility of some alternative vegetable oil-based dielectrics, which are experimentally justified as a potent alternative of conventional kerosene. Apart from these, it includes some comparative talks on dielectric nature and their impacts on the responses and surface properties. Finally, this article highlights some compromise solutions which are probably capable of mitigating the hurdles to some extent, so that the sustainable machining can be encouraged in real sense.

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“…They found that vegetable oils led to similar results as mineral oils when used as dielectrics in EDM. Ng et al [19] compared canola and sunflower oils with a conventional dielectric in terms of MRR and tool wear rate (TWR). The conclusion was that both vegetable oils have the potential to replace conventional dielectric fluids.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Stability of Vegetable Oils Used as Dielectric Fluids for Electrical Discharge Machining

et al. 2020

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One main drawback of electrical discharge machining (EDM) is related to the dielectric fluid, since it impacts both the environment and operator health and safety. To resolve these issues, recent research has demonstrated the technical feasibility and qualitative performance of vegetable oils as substitutes for hydrocarbon-based dielectric and synthetic oils in EDM. However, due to the higher content of unsaturated fatty acids, vegetable oils lose their stability, due to several factors such as heating or exposure to light or oxygen. The present study is a first attempt to analyze the extent to which the physic-chemical properties of vegetable oils change during EDM processing. Refractive index, dynamic viscosity and spectra analyses were conducted for sunflower and soybean oils. The results revealed that, under the applied processing conditions, no structural changes occurred. These findings are very promising from the perspective of EDM sustainability.

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Investigation of biodiesel dielectric in sustainable electrical discharge machining

Cited by 63 publications

References 10 publications

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

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

Feasibility assessment of some alternative dielectric mediums for sustainable electrical discharge machining: a review work

Experimental Investigation of Stability of Vegetable Oils Used as Dielectric Fluids for Electrical Discharge Machining

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