Micro electrical discharge machining in nitrogen plasma jet

Zou, Rimao; Yu, Zuyuan; Yan, Chengyang; Li, Jianzhong; Liu, Xin; Xu, Wenji

doi:10.1016/j.precisioneng.2017.08.011

Cited by 20 publications

(6 citation statements)

References 19 publications

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“…To explore the machining characteristics of magnetic field 5 shows the experimental equipment. It includes a set of XYZ stages of 200 mm travel distance along with unidirectional repeatability of 1 µm to control the tool movement, a high precision spindle to hold the tool electrode with 1µm radial runout, a set of wire electrical discharge grinding (WEDG) unit along with a set of NPJ generator and high velocity air jet (HVAJ) generator [7]. For this research work, a couple of permanent magnets (ndfe35) are placed parallel to the workpiece.…”

Section: Methodsmentioning

confidence: 99%

Magnetic Field Assisted Micro EDM in Nitrogen Plasma Jet and HVAJ

Asad¹,

Yu²,

Zou³

et al. 2020

IJMMM

Self Cite

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Dielectrics play a key role during electrical discharge machining (EDM). Kerosene-based oil, deionized water and gas are traditionally used dielectrics in industries. The process performance of micro EDM mainly based on it. The major drawbacks of liquid-based dielectrics are large ratio of electrode wear and pollution. Micro EDM in gas provides almost zero tool wear. However, the discharge gap is very small, which leads to abnormal discharge during machining. The theme of this research work is an investigation of the micro EDM in nitrogen plasma jet (NPJ) performed in magnetic field for enhancing process performance. In this study, the magnetic field is introduced perpendicular to the current direction, for enhancing the material removal ratio and helping in debris distribution from machining area. Series of experiments have been conducted, by varying magnetic field current and voltage. Experimental outcome shows that this adopted approach significantly improves the material removal rate (MRR) as well as surface roughness (Ra). The presence of Lorentz force has no negative impact on electrode wear. Index Terms-Electrical discharge machining (EDM), magnetic field, nitrogen plasma jet, machining performance.

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Section: Methodsmentioning

confidence: 99%

Magnetic Field Assisted Micro EDM in Nitrogen Plasma Jet and HVAJ

Asad¹,

Yu²,

Zou³

et al. 2020

IJMMM

Self Cite

View full text Add to dashboard Cite

show abstract

“…Experiements in both the macro-and micro-domain indicate that gaseous dielectric helps in bringing down the TWR and also alleviates dependency of TWR on pulse duration [94][95][96]. Investigations on the use of a nitrogen plasma jet in µ-EDM also suggests miniscule tool wear in dry-EDM [97]. Further, in dry-EDM, there is lower risk of a fire hazard and dangerous gases which emanate from a liquid dielectric [98].…”

Section: Dielectric Parametersmentioning

confidence: 99%

Microfeatures and microfabrication: current role of micro-electric discharge machining

Singh

Mali

2019

J. Micromech. Microeng.

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The field of microfeatures and microdevices is an emergent field, with applications extending from cooling of turbine blades to drug delivery in the human body. Fabrication of these features, microfabrication, is a challenge as it requires precise control over material removal in the micro domain. There are several techniques available for microfabrication, of which microelectric discharge machining (μ-EDM) has emerged as a leading technique for its versatility on different materials and ability to fabricate intricate parts and features. This paper presents compiled information on microfeatures, their applications, and different microfabrication techniques with emphasis on the current status and role of µ-EDM in microfabrication.

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“…This knowledge led to further studies in the field of hybrid processes. 68 The addition of powder in the dielectric medium has also shown improvement in the machining efficiency. Though powder mixed electrical discharge machining is not classified as a hybrid machining process as it does not alter the logic or physical process of machining, it is an improvement to the conventional EDM as it alters the spark discharge and plasma formation in the dielectric.…”

Section: Introduction To Hybrid Processes and Powder Mixed Electrical...mentioning

confidence: 99%

An insight on Powder Mixed Electric Discharge Machining: A state of the art review

Srivastava¹,

Vishnoi²,

Gangadhar³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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Electrical discharge machining (EDM) is an exigent focus of interest for researchers since its inception. EDM has a wide range of applications due to its non-contact machining process based on the spark erosion method. EDM is a non-conventional machining process with high potential in the recent industrial era. Due to the few limitations of EDM, many hybrid techniques are evolved in recent years. The present review paper elucidates the in-depth mechanism of the material removal process in EDM. Hybrid EDM processes are also reviewed with special attention on powder mixed electrical discharge machining (PMEDM). A detailed comparison between the EDM and PMEDM is presented with a meticulous portrayal of the advancement and evolution of PMEDM. The emphasis is given on significant performance parameters, namely tool wear rate, material removal rate and surface roughness, besides other parameters. In addition, the study also includes different modelling, optimization, and surface analysis techniques on EDM. The paper concludes with the future scope of PMEDM in the fields of manufacturing along with its applications.

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Micro electrical discharge machining in nitrogen plasma jet

Cited by 20 publications

References 19 publications

Magnetic Field Assisted Micro EDM in Nitrogen Plasma Jet and HVAJ

Magnetic Field Assisted Micro EDM in Nitrogen Plasma Jet and HVAJ

Microfeatures and microfabrication: current role of micro-electric discharge machining

An insight on Powder Mixed Electric Discharge Machining: A state of the art review

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