Electrical Discharge Machining (EDM): A Review

Babu, V. Jagadesh; Soni, J.S.; Kumar, B. Suresh; Kumar, Sanjiv

doi:10.14445/22315381/ijett-v40p260

Cited by 6 publications

(11 citation statements)

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“…It finds extensive applications in mould and die manufacturing industries [5]. It is finds application in aircraft, automobile, telecommunication and biotechnology industries [6]. Its applications can also be found in the electronics, healthcare, optics, sports, jewellery making and toys manufacturing [7].…”

Section: Practical Utility Of Edmmentioning

confidence: 99%

Optimization of Process Parameters of Electrical Discharge Machining Process For Performance Improvement

Khan¹,

Rao²

2019

IJITEE

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Unconventional machining methods are used where conventional techniques are unachievable, inacceptable or cost ineffective. Number of unconventional techniques has been developed to achieve special machining conditions. When these methods are engaged properly, they provide several benefits over conventional methods. High strength alloys can be machined easily, complicated contours and difficult geometries with close tolerances and better surface topograph can be developed using unconventional processes. One of the most popular unconventional machining methods is electrical discharge machining. In this paper, the detailed investigation has carried out to give an insight into the progression of research in the domain of spark machining and optimizing important process variables of this type of machining. It has been found from the available literature that optimization of process parameters of electrical discharge machining can improve machining performance pertaining to material removal and surface finish. Identifying the research gaps and are presented under the heading analysis and discussion. Conclusions drawn from this work will be useful in carrying out research in the sphere of unconventional EDM.

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Section: Practical Utility Of Edmmentioning

confidence: 99%

Optimization of Process Parameters of Electrical Discharge Machining Process For Performance Improvement

Khan¹,

Rao²

2019

IJITEE

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“…Electrical Discharge Machining is a type of non-conventional machinery that has a working system by utilizing some electric sparks through the gap between the electrode and the workpiece filled with the dielectric fluid. The erosion of the material occurs because of the thermal energy generated from the sparks (Banu & Ali, 2016) . The thermal energy generated by the plasma channel between the electrode and the workpiece ranges from 8000 ° C to 12,000 ° C and can reach temperatures up to 20,000 ° C. The material will melt and evaporate become debris.…”

Section: A Introductionmentioning

confidence: 99%

Optimization of Surface Roughness of AISI P20 on Electrical Discharge Machining Sinking Process using Taguchi Method

Rachman¹,

Purnomo²,

Fajardini³

et al. 2021

JTAM

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This research aims to obtain optimal value for the surface roughness of the material AISI P20 on the Electrical Discharge Machining (EDM) Sinking process. In the present research, the Taguchi method is used to investigate the signiﬁcant influence of process variables on the machining performance and determine the combination of process variables on the EDM process. Orthogonal array L18 (21 × 33) based on the Taguchi method is chosen for the design of experiment. The experiment is replicated twice to finding out the influence of four process variables such as type of electrode, voltage gap, on-time, and off-time on the response performance. Machining performance is evaluated by surface roughness as a response variable that had quality characteristics, smaller is better. These experimental data were analyzed using the Signal-to-noise ratio and Analysis of Variance. The analysis results show that the surface roughness is influenced by the type of electrode and on time. Combination of process variables to obtain optimal surface roughness are using graphite electrodes, and setting values of gap voltage 40 volt, on-time 250 μs, and off-time 20 μs. This combination of process variables can be applied to the manufacturing process using EDM sinking in order to produce a good quality product that determined based on the surface roughness value.

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“…It is a thermal machining process where the machined area of the workpiece is removed by the thermal energy created by the electrical spark [4,7,8]. The electrical sparking process is a repetitive and discrete process which is carried out in dielectric fluid [4,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Usually, the dielectric fluids are in the form of mineral oil-based liquid or hydrocarbon oils. However, these types of dielectric fluids have certain deficiencies that are related to fire hazard and environmental problems [9][10][11][12]. Therefore, the alternative to overcome this problem is to use gas dielectric instead of liquid dielectric during the machining process [3,4,[9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Stability of micro dry wire EDM: OFAT and DOE method

Banu

Ali

Rahman

et al. 2020

Int J Adv Manuf Technol

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Micro dry wire electrical discharge machining (μDWEDM) is an environmental-friendly machining process where gas is used as the dielectric fluid instead of liquid. In this process, certain modifications of wire electrical discharge machining (WEDM) are required during the machining operation for stable machining. In μDWEDM, the process is considered stable if the machining is continuous without any interruption due to wire breakage or wire lag. However, in the present state of the arts, stable and smooth machining process using μDWEDM remains a critical issue. Hence, the objectives of this research are to establish a stable μDWEDM process using two different experimental approaches: one-factor-at-a-time (OFAT) and design of experiment (DOE) method. The investigation was performed on a stainless steel (SS304) with a tungsten wire as the electrode using integrated multiprocess machine tool, DT 110 (Mikrotools Inc., Singapore). Types of dielectric fluid, dielectric fluid pressure, polarity, threshold voltage, wire tension, wire feed rate, wire speed, gap voltage, and capacitance were the controlled parameters. The machining length of the microchannels was measured using scanning electron microscope (SEM) (JEOL JSM-5600, Japan). Analysis based on these two experimental approaches shows that stable μDWEDM process is achievable when the types of dielectric fluid, dielectric fluid pressure, polarity, threshold voltage, wire tension, wire feed rate, and wire speed remain as the fixed parameters while the capacitance and gap voltage remain as the controlled parameters.

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Electrical Discharge Machining (EDM): A Review

Cited by 6 publications

References 0 publications

Optimization of Process Parameters of Electrical Discharge Machining Process For Performance Improvement

Optimization of Process Parameters of Electrical Discharge Machining Process For Performance Improvement

Optimization of Surface Roughness of AISI P20 on Electrical Discharge Machining Sinking Process using Taguchi Method

Stability of micro dry wire EDM: OFAT and DOE method

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