Effects of Different Cavity Geometries on Machining Performance in
                    Micro-Electrical Discharge Milling

Vidya, Shrikant; Vijay, -; Barman, S.; Chebolu, Aneissha; Nagahanumaiah,; Das, Alok Kr.

doi:10.1115/1.4029275

Cited by 21 publications

(6 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Discharge patterns and shape errors in micro-ED milling operation. 18 has been widely used as a dielectric fluid in WEDM, but many reported literature suggest that the use of EDM oil instead of deionized water produces better results while machining of hard materials such as single-crystal silicon, tungsten carbides and polycrystalline diamonds (PCDs). 24 Compared to water-based WEDM operations, oil-based WEDM could not only eliminate electrolysis and corrosion but also prevent cobalt depletion in the cutting of metal carbides and therefore achieve better surface morphology and surface finish.…”

Section: Variants Of Micro-edmmentioning

confidence: 99%

“…17 In this process, a cylinder-shaped tool rotates around the Z -axis, and it has its scanning movement in the X - and Y -directions. 18 During the micro-EDM milling method, a minimum spark gap is maintained ensuring that the tool and the workpiece do not touch each other. In this method, a very small holding force is applied to the workpiece, avoiding vibration and mechanical stress.…”

Section: Introduction To Conventional Edm and Micro-edm Processmentioning

confidence: 99%

See 1 more Smart Citation

Micro-electrical discharge machining of difficult-to-machine materials: A review

Prakash

Kumar

Singh

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

Electrical discharge machining has emerged as one of the most accepted non-traditional machining methods that have the capability of attaining complex shapes and better feature size in difficult-to-machine materials. In this article, an advanced review of conventional electrical discharge machining and micro–electrical discharge machining of difficult-to-machine materials, such as nickel and its alloys, titanium alloys, stainless steel (SUS 304) and advanced ceramics, has been presented. The review begins with an introduction to the conventional electrical discharge machining and micro–electrical discharge machining processes, followed by classifications and a brief discussion on different aspects of micro-manufacturing methods. The current research trends and developments, research gaps and challenges of the conventional electrical discharge machining and micro–electrical discharge machining of nickel and its alloys, titanium alloys (Ti6Al4V), stainless steel and advanced ceramics are also discussed in depth. A brief note on future research trends, based on the available literature, has been included in the last section.

show abstract

Section: Variants Of Micro-edmmentioning

confidence: 99%

Section: Introduction To Conventional Edm and Micro-edm Processmentioning

confidence: 99%

Micro-electrical discharge machining of difficult-to-machine materials: A review

Prakash

Kumar

Singh

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

show abstract

“…Rossella Surace et al (2016) designed and fabricated a polymeric micro filter for the use in biomedical sciences with the aid of EDM [85].Tassilo-Maria Schimmelpfennig et al (2015) carried out comapritive study of wet and dry EDM and came out with result that dry EDM has lower ringing effect and need sensitive tool drive with micro-piezoelectric actuators [61]. Shrikant Vidya et al (2015) observed that in µEDM side discharge covering a segment of 120 deg around the cylindrical electrode attributes to tool deflection, non-uniform spark gap, and jumping of discharges and rotation of tool electrode benefits significantly [62]. Hamid studied the effect of rotation of electrode, powder addition and magnetic field simultaneously and found that with the addition of 1 g/l of TiO2 powder and application of magnetic field (0.38 T) could help to increase the MRR and also suggested that higher spark energy leads to conversion of large amount of electric energy to thermal energy and enhance MRR [63].…”

Section: Assorted Unprecedented Ideasmentioning

confidence: 99%

Brief Chronological Study of the Evolution of Electrical Discharge Machining

2017

IJSR

View full text Add to dashboard Cite

Un-conventional or non-traditional machining methods generally create a phantasm in mind that these are very new. In reality these methods are named so because of the process mechanism in which no shear force is used directly neither there is any contact between tool and workpiece. This does not insinuate that these processes are new because 1694 saw the dawn of EDM when Sir Robert Boyle described the phenomena of electric discharges, 1952 saw the birth of electron beam technology andin the year of 1957 and Gordon Gould designed the first laser device. All these non-traditional processes have developed rapidly in last few decades and are now the state of the art of the present manufacturing technology. Among these EDM has accrued a lot because of its advantages over other non-traditional processes. This accruement is result of various unprecedented ideas those changed the countenance of EDM and made it more efficient and economic process among the non-traditional processes. This paper presents the literature survey to throw light on all those ideas those lead to the current state of the art of EDM.

show abstract

“…Molten metal ejected from the electrode can either flow as a secondary fluid or form globules which on subsequent cooling generates spherical particles or debris. [21][22][23] The size and shape of the globules depend on the discharge energy, crater size and amount of molten metal expelled. When the quantity of the expelled molten metal is larger, then it deposits on the nearby surface forming redeposited layer.…”

Section: Effect Of Iegmentioning

confidence: 99%

Dielectric flow observation at inter-electrode gap in micro-electro-discharge-milling process

Mullya

Karthikeyan

2016

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

The material removal phenomenon of sparking and melting in micro-electro-discharge-milling process occurs at interelectrode gap of dimension less than 50 mm. The behavior of fluid flow properties at inter-electrode gap is not well discussed in the literature and its information will be useful to understand the material flow behavior and tool wear in micro-electro-discharge-milling process. Based on our previous findings, it was well recognized that tool rotation is an inherent part of micro-electro-discharge-milling and directly influences debris flushing and redeposition. Also for a stable machining performance, flow of dielectric will play an important role in flushing away debris from the gap. The objective of this work is to investigate the fluid flow along the inter-electrode gap and to study its effect on debris movement and molten metal redeposition. The fluid flow along the narrow gap of micro-electro-discharge-milling process for different machining conditions is analyzed by computational fluid dynamics simulation. By particle simulation, the effect of different sized particles formed at various positions and their subsequent movement was also analyzed. The computational fluid dynamics analysis results were validated with scanning electron micrographs obtained for various machining conditions of the experiments. The effect of inlet nozzle velocity, tool rotation and size of electrode gap on the dielectric fluid flow was primarily reported and the findings were later superimposed on particle injection velocity to determine the movement of debris along inter-electrode gap. The effect of debris movement on redeposition at workpiece/tool surface and its ejection from inter-electrode gap is recounted.

show abstract

Effects of Different Cavity Geometries on Machining Performance in Micro-Electrical Discharge Milling

Cited by 21 publications

References 14 publications

Micro-electrical discharge machining of difficult-to-machine materials: A review

Micro-electrical discharge machining of difficult-to-machine materials: A review

Brief Chronological Study of the Evolution of Electrical Discharge Machining

Dielectric flow observation at inter-electrode gap in micro-electro-discharge-milling process

Contact Info

Product

Resources

About