Feasibility investigation of neem oil as a dielectric for electrical discharge machining

Das, Shirsendu; Paul, Swarup; Doloi, B.

doi:10.1007/s00170-019-04736-5

Cited by 33 publications

(16 citation statements)

References 23 publications

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“…Similar types of results are also noticed when WVO, palm oil, canola, and sunflower were used as dielectrics [15,61,62]. Lately, Das et al [18] investigated the performance of neem oil as a dielectric to machine Ti-6Al-4V with copper electrode, where 4-16 A current, 20-60 V gap voltage, 50-250 µs of pulse-on time, and 10-50 µs of pulse-off time were maintained. Experimentally, both the dielectrics have shown 30.75 mm 3 /min and 32.27 mm 3 /min maximum MRR, respectively, when 16 A current, 150 µs pulse-on time, 20 µs pulse-off time, and 30 V gap voltage were maintained.…”

Section: Impact Of These Dielectrics On the Responsesmentioning

confidence: 59%

“…Vegetable oils like jatropha, canola, waste vegetable oil, and sunflower oil have been tested experimentally, and they have shown impressive machining outcomes. Das et al [18] explained the correlation of the EDM process along with the various wings of the sustainability, where issues like time consumption, gas emerging, and dependency on convention fuel are marked as the curtail aspects of sustainability assessment (Fig. 1).…”

Section: Research Methodology and Aim Of The Review Workmentioning

confidence: 99%

“…Figure 8 compares the processed surfaces of Ti-6Al-4V using kerosene and neem as dielectrics. It can be clearly observed that the surface which is processed with kerosene is effected with indentation, unevenness, cavities, etc., whereas the other surface (for neem) is comparatively decent in nature and size of the irregularities is relatively less [18].…”

Section: Impacts On the Surface Texturementioning

confidence: 97%

“…Similar approach, where bio-dielectrics ensured 38-138% more MRR and better surface properties, but caused 100-275% more TW than kerosene [62]. Das et al [18] used neem dielectric to process Ti-6Al-4V with copper tool and compared the responses with kerosene. Findings claimed that neem dielectric ensured 22% more MRR, 17% less SR, and better surface texture and consumed 3.8-25% less time to attain the projected MRR than kerosene.…”

Section: Vegetable Oils As Dielectricsmentioning

confidence: 99%

“…Regarding micro-hardness, the physical properties like viscosity, Fig. 8 EDMed surface of Ti-6Al-4 V with Cu electrode using kerosene (a) and neem (b) as dielectrics (Das et al [18])-Copyright reserved thermal conductivity, and oxidation rate have notable contributions. Higher oxidation rate helps in quick melting and higher viscosity, and thermal conductivity ensures proper flushing and adequate heat dissipation, which possesses comparatively harder surface than that of kerosene [13].…”

Section: Grounded Theoriesmentioning

confidence: 99%

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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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Section: Impact Of These Dielectrics On the Responsesmentioning

confidence: 59%

Section: Research Methodology and Aim Of The Review Workmentioning

confidence: 99%

Section: Impacts On the Surface Texturementioning

confidence: 97%

Section: Vegetable Oils As Dielectricsmentioning

confidence: 99%

Section: Grounded Theoriesmentioning

confidence: 99%

See 3 more Smart Citations