Microelectric Discharge Plasma: Characterization and Applications

Subbu, S. Kanmani; Dhamodaran, S.; Ramkumar, J.

doi:10.1080/10426914.2012.663127

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…Femtosecond laser texturing chemical etching and electric discharge machining (EDM) processes are the techniques predominantly used by the researchers for making the textures on tool surfaces [21][22][23][24][25][26][27]. In 2012, S Kanmani Subbu et al [28] fabricated an array of dimple-shaped textures on various surfaces using micro-EDM. Jianxin et al [22] used micro-EDM for fabrication of micro-holes on the rake and flank face of the cemented carbide tool inserts.…”

Section: Introductionmentioning

confidence: 99%

Electric discharge texturing of HSS cutting tool and its performance in dry machining of aerospace alloy

Singh

Sasi

Subbu

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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Conventional machining processes face several problems pertaining to the use of cutting fluids since most of them are toxic and contribute to a major portion of overhead costs. To address these issues, several methods like usage of solid lubricants, surface treatment, coating, minimum quantity lubrication and texturing of cutting tools have been adopted. Micro-texturing on cutting tool is a relatively recent technique which is being used to improve the tribological characteristics of the tool surface. Typical methods available for surface texturing are chemical etching, electro chemical machining, laser beam machining and electric discharge machining. Amongs these methods, there is a significant lack of literature exploring the feasibility of electric discharge machining (EDM) as a texturing process, especially on commonly used tool materials such as high-speed steel. This paper investigates the fabrication of micro-textures on high-speed steel to use micro-EDM. The EDM process parameters were optimized to create uniform textures. Upon comparing the performance of the textured cutting tools with conventional tools, it was found that the current texture geometry was highly effective in reducing the cutting forces at low speeds.

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Section: Introductionmentioning

confidence: 99%

Electric discharge texturing of HSS cutting tool and its performance in dry machining of aerospace alloy

Singh

Sasi

Subbu

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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A 1D model for prediction of dry electrical discharge machining (dry-EDM) plasma characteristics

Bayki,

Mujumdar

2023

Journal of Manufacturing Processes

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0D Modeling of Dry-Electrical Discharge Machining Plasma Discharge

Mujumdar,

Bayki

2023

Journal of Micro- And Nano-Manufacturing

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There is a growing interest in developing the dry electrical discharge machining (EDM) process as a sustainable alternative to the conventional liquid dielectric-based EDM process. It is shown that the dry EDM process possesses advantages over the conventional process in terms of thermal damage, recast layer, and tool wear. However, there is a need to increase the productivity of the dry EDM process for its successful adaptation in the industry. This paper presents a dry EDM plasma discharge model with air as the dielectric medium. The model uses global modeling (0D) approach in which equations of mass balance, energy balance, and plasma expansion are solved simultaneously to obtain a time-dependent description of the plasma in terms of its composition, temperature, diameter, and heat flux to electrodes. The model includes reaction kinetics involving 622 reactions and 55 species to determine the air plasma composition. A single discharge dry EDM operation is successfully simulated using the model, and the effects of the interelectrode gap and discharge current on the plasma are studied. An increase in the interelectrode gap decreases the average electron density, plasma temperature, and heat flux. On the other hand, an increase in the discharge current increases the electron density, temperature, and diameter of the plasma linearly, while heat flux to the workpiece increases exponentially. Overall, the model provides an essential tool to study the dry EDM process mechanisms at a fundamental level and devise methods for process improvements.

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Microelectric Discharge Plasma: Characterization and Applications

Cited by 3 publications

References 25 publications

Electric discharge texturing of HSS cutting tool and its performance in dry machining of aerospace alloy

Electric discharge texturing of HSS cutting tool and its performance in dry machining of aerospace alloy

A 1D model for prediction of dry electrical discharge machining (dry-EDM) plasma characteristics

0D Modeling of Dry-Electrical Discharge Machining Plasma Discharge

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