On Correlation of Pulses and Tool Elongations at Micro-Electrical Discharge Machining Aided by Ultrasonics

Ghiculescu, Daniel; Marinescu, N.; Klepka, Tomasz; Căruțașu, Nicoleta Luminița

doi:10.4028/www.scientific.net/amm.809-810.309

Cited by 2 publications

(4 citation statements)

References 9 publications

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“…The results provided by FEM using a complex model with time dependent radius of the plasma channel and gas bubble formed around plasma channel support the assumptions from above [9]. Some examples of temperature distribution after a pulse end in case of classic EDM (in agreement with experimental data -Fig.…”

Section: Applied Mechanics and Materials Vol 834supporting

confidence: 82%

“…CMS produces shock wave with pressure of 100 MPa order of magnitude. This is able to better evacuate particles from the gap reducing process instability, removing by shearing the micropeaks of machined surface, and removing greater volume of material, which is found in liquid state when CMS is occurring during pulse time [9]. Our experimental data proved that CMS is able to stop the discharge.…”

Section: Applied Mechanics and Materials Vol 834supporting

confidence: 51%

“…So, this type of pulses could be considered similar to classic EDM from the point of view of thermal removal mechanism. At EDM, the main mechanism of material removal is boiling, according to generally agreed overheating model [9].…”

Section: Applied Mechanics and Materials Vol 834mentioning

confidence: 99%

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On Overlapping the Pulses on Cumulative Microjets Stage at Ultrasonically Aided Electrical Discharge Machining

Ghiculescu

Marinescu

Alupei

2016

AMM

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The paper deals with a solution to increase the machining rate at electrical discharge machining aided by ultrasonics (EDM+US), i.e. the overlapping the voltage pulses provided by EDM generator on the cumulative microjets stage (CMS), which occurs at every final of an ultrasonic period by collective implosion of the gas bubbles from the working gap. This overlapping moves the limit of the removed material by a discharge from the boiling isothermal (at classic EDM) to melting isothermal (at EDM+US) as it is emphasized by the results of finite element analysis. The preliminary experimental data analyzed in the paper are obtained in case of random overlapping at ultrasonic frequency of 20 kHz. They demonstrate an increase of machining rate with more than 300% at EDM+US in comparison with classic EDM in the same working conditions.

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Section: Applied Mechanics and Materials Vol 834supporting

confidence: 82%

Section: Applied Mechanics and Materials Vol 834supporting

confidence: 51%

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On Overlapping the Pulses on Cumulative Microjets Stage at Ultrasonically Aided Electrical Discharge Machining

Ghiculescu

Marinescu

Alupei

2016

AMM

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“…Finite element modelling and analyses proposed by Ghiculescu (2012Ghiculescu ( , 2014 for metal removing mechanism of ultrasonic tool vibration assisted micro-EDM to demonstrate the cavitation and flushing effect. They considered thermal and cavitation effects of UV using cosmol multiphysics and time dependent heat transfer in solids.…”

Section: Figure 5 a Schematic Diagram Of The Usedm Experimental Setupmentioning

confidence: 99%

Optimisation strategies in ultrasonic vibration assisted electrical discharge machining: a review

Kumar

Grover

Walia

2017

IJPTECH

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In this paper, an attempt has been made to review the literature on strategies formulated and tested in ultrasonic vibration assisted electrical discharge machining (USEDM). The strategies for optimisation of EDM performance include flushing, dimensional accuracy, cavitation, surface morphology, polluted gases and chemical effects etc have been highlighted. The major performance controllable parameters in EDM process have also been discussed in this study. The main emphasis is given on classification of USEDM process on the basis of mode of ultrasonic vibration (UV) action imparted to EDM system, which includes a tool, work piece and the dielectric medium. The ultimate purpose of this study is to generalise the variable relationships of various proposed strategies, which may be applied in industries to improve the performance of USEDM. At the end of this study, some limitations of implementing ultrasonic vibration in EDM have been discussed. and has an illustrious, diverse and rich experience in the fields of academic, research and modern industry. His area of research includes advanced manufacturing processes and industrial engineering. He has survived seven PhD and more than 40 MTech Theses. He has published more than 150 research papers in peer reviewed journals and international conferences.

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On Correlation of Pulses and Tool Elongations at Micro-Electrical Discharge Machining Aided by Ultrasonics

Cited by 2 publications

References 9 publications

On Overlapping the Pulses on Cumulative Microjets Stage at Ultrasonically Aided Electrical Discharge Machining

On Overlapping the Pulses on Cumulative Microjets Stage at Ultrasonically Aided Electrical Discharge Machining

Optimisation strategies in ultrasonic vibration assisted electrical discharge machining: a review

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