Model of Pulsed Electrical Discharge Machining (EDM) using RL Circuit

Minhat, Ade Erawan; Khamis, Nor Hisham Haji; Yahya, Azli; Andromeda, Trias; Nugroho, Kartiko

doi:10.11591/ijpeds.v5i2.6681

Cited by 7 publications

(7 citation statements)

References 9 publications

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“…A Mitsubishi EA12DM Dyna Tech machine is used for the experiment with Castrol Ilocut EDM 401 oil (submerged with flushing) as the electrolyte. A transistor pulse (TP) power circuit method is adapted which is the most general-purpose circuit, as quoted by past researchers, to provide a higher material removal rate as the discharge energy is higher [12]. The pulse height (current setting), the pulse width (the duration of the EDM spark measured in microseconds) and the off time (time between consecutive sparks measured in microseconds) are decided by the oscillation circuit that is selected.…”

Section: Methodsmentioning

confidence: 99%

Optimization of Electrode Material for EDM Die-sinking of Titanium Alloy Grade 5 - Ti6Al4V

Suresh

Jamil

Sulaiman

et al. 2016

International Journal on Advanced Science, Engineering and Information Technology

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Titanium alloy grade 5, Ti6Al4V, is extensively gaining importance in the industrial environment, specifically in aerospace, medical and automotive domains, mainly due to its exceptional blend of mechanical properties like high hardness which is further heat treatable, high strength-to-weight ratio which makes it light, high corrosion and temperature resistance etc. However, the same properties undervalue Ti6Al4V as a conventionally difficult-to-machine material. Rapid tool wear, excessive heat generation, dimensional instability and loss of surface integrity are the issues that plague the conventional machining of Ti6Al4V. In view of these facts, non-traditional machining processes like electron discharge machining (EDM) -die sinking and wire cut prove to be a substitute for the conventional machining. In this study, an experimental optimization of EDM die-sinking electrode materials among copper, brass and graphite, is carried out. Experimental design is created using a statistical tool and actual machining is carried out to record the surface roughness, variations on the surface hardness and dimensional stability. Quality evaluation and statistical analysis substantiates graphite electrodes to produce better surface finish-Ra 2.05microns with minimal dimensional variation-less than 10%when operated at minimum spark gaps. It is inferred that graphite electrodes exhibit higher resistivity towards current than its counterparts thus passing minimum spark energy preventing excessive self-wear and a dimensionally accurate work piece. The depth of machining highly impacts the variations on the surface hardness post machining.

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Section: Methodsmentioning

confidence: 99%

Optimization of Electrode Material for EDM Die-sinking of Titanium Alloy Grade 5 - Ti6Al4V

Suresh

Jamil

Sulaiman

et al. 2016

International Journal on Advanced Science, Engineering and Information Technology

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“…Deficiency of this assumption in [8], led to a mismatch of its mathematical expression with the gap current profile in this phase.…”

Section: Ignition Phasementioning

confidence: 99%

“…Although gap spark profiles play an important role in the analysis of the EDM process, but very few mathematical models have been developed to identify the profile of EDM spark during machining procedure. Minhat et al [8] presented the mathematical model of EDM pulses based on the initial, ignition and discharge phases. However, the model failed to determine the EDM profiles correctly, Moreover, mathematical equation did not match the profiles in all phases.…”

Section: Introductionmentioning

confidence: 99%

EDM process through mathematical model

Dehghani¹,

Yahya²,

Khamis³

et al. 2019

IJPEDS

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<span>EDM is a well-established hole machining option with various advantages due to non-contact characteristics of the process. However, knowledge about the process is not enough for its more improvements. Exprimenal studies are costly and time consuming because of the complex nature of process. Therefore, process modeling is a good alternative to reduce the experimental expense related to the technology. This paper studys EDM process through mathematical model, which includes the precise insight into the interactive behavior of EDM system. The ignition, discharge and recovery phases of the model have been developed through MATLABs time domain analysis. Simulation result shows good agreement with expected profile of EDM spark. To verify the model, simulated material removal rates (MRRs) from series of simulation are compared with the experimental ones reported by previous researcher. Ability of the model to predict the dynamic behavior profile of the EDM system is successfully confirmed by low average percentage error in predicting MRR.</span>

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“…The crystal structure of the sample prepares by ESDM was measured by XRD, which contained both titanium oxide and Ti simultaneously [ 14 ]. Figure 1 shows the ESDM process [ 15 ]. Figure 1 a illustrates the occurrence of electric spark discharge.…”

Section: Introductionmentioning

confidence: 99%

A Study of a PID Controller Used in a Micro-Electrical Discharge Machining System to Prepare TiO2 Nanocolloids

et al. 2020

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This study developed a micro-electrical discharge machining (micro-EDM) system for producing TiO2 nanocolloids. When a proportional–integral–derivative controller designed using the Ziegler–Nichols method was adopted to control the interelectrode gap, TiO2 nanocolloids were obtained from spark discharges generated between two titanium wires immersed in deionized water. For a pulse on time–off time of 40–40 μs and a colloid production time of 100 min, TiO2 nanocolloids were produced that had an absorbance of 1.511 at a wavelength of 245 nm and a ζ potential of −47.2 mV. They had an average particle diameter of 137.2 nm, and 64.2% of particles were smaller than 91.28 nm. The minimum particles were spherical. The characteristics of colloids confirmed that the micro-EDM system can produce TiO2 nanocolloids with excellent suspension stability. The colloid production method proposed in this study has the advantages of low equipment cost and no dust diffusion in the process environment. These advantages can improve the competitiveness of the electric spark discharge method for high-quality TiO2 nanoparticle production. The colloids produced in this study did not contain elements other than titanium and oxygen, and they may prevent secondary environmental pollution.

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Model of Pulsed Electrical Discharge Machining (EDM) using RL Circuit

Cited by 7 publications

References 9 publications

Optimization of Electrode Material for EDM Die-sinking of Titanium Alloy Grade 5 - Ti6Al4V

Optimization of Electrode Material for EDM Die-sinking of Titanium Alloy Grade 5 - Ti6Al4V

EDM process through mathematical model

A Study of a PID Controller Used in a Micro-Electrical Discharge Machining System to Prepare TiO2 Nanocolloids

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