Optimum design of vibratory electrode in micro-EDM process

Beigmoradi, Sajjad; Ghoreishi, M.; Vahdati, Mehrdad

doi:10.1007/s00170-017-1428-1

Cited by 11 publications

(6 citation statements)

References 16 publications

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“…Graphite gave the least performance in terms of surface integrity parameters. Sajjad Beigmoradi et al [27] conducted a comparison between different tool electrodes' materials and shapes. They found that the tungsten triangular-shaped electrode improved the flushing conditions as compared to circular graphite and the circular tungsten electrode.…”

Section: Literature Surveymentioning

confidence: 99%

Influence of tool materials on surface modification using μEDC process

Mohanty

Das

Dixit

2021

Surface Engineering

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The work aims to assess the influence of tool electrode material while surface modification of Tialloy through the micro-electrical discharge coating (μEDC) process. Brass and tungsten microtool (800 μm)are chosen based on their mechanical, thermal, and electrical properties to conduct the experiments at different coating criteria such as duty cycle, voltage, and powder (tungsten disulphide) concentration. Various performance indexes i.e., micro-hardness, surface roughness, and recast surface height, are evaluated. Energy-dispersive X-ray spectroscopy (EDX) recognizes the elemental presence on the recast zone formed over Ti-alloy. A comparative analysis of the surfaces generated using both thetools is carried out for their performance measurement. The modified samples' hardness improved by twice the base material due to the formation of hard phases of tungsten and titanium, as affirmed by the EDX study. The results indicate that both the micro-tool electrodes' mechanical, electrical, and thermal properties significantly affect the process parameters for surface alteration of Ti-alloy.

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Section: Literature Surveymentioning

confidence: 99%

Influence of tool materials on surface modification using μEDC process

Mohanty

Das

Dixit

2021

Surface Engineering

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“…Gadeschi et al 8 computed the heat flow from the electrode to the dielectric during a EDM using numerical simulation and experimentation. Beigmoradi et al 9 studied different types of tool geometry and materials which can be used as a vibratory tool in the EDM process. The vortex generation and the tool shape can enhance the debris flushing in the gap.…”

Section: Introductionmentioning

confidence: 99%

Simulation of flow-field and debris temperature analysis in micro-electrical discharge milling using slotted tools

Mullya¹,

Karthikeyan

Ganachari³

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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In micro-electrical discharge milling (μED-milling), the rotation and forward feed motion of the tool is the key element responsible for evacuation of the debris particles. The inability to eliminate debris from the interelectrode gap (IEG) causes secondary discharge, short-circuit, and hampers removal rate. This problem is predominant in electrical discharge machining (EDM) where the tool is stationary. Various methods have been devised in the literature to boost debris removal from the IEG. In this paper, the use of a slotted tool with different cross-sections is proposed. The dielectric flow-field, debris trajectory, and cooling rate are calculated using computational fluid dynamics (CFD). Effect of different parameters such as tool rotation, gap size, jet velocity, the shape of slots on the dielectric flow is determined. The slots on the tool create turbulence which enhances the debris removal from the IEG. It also provides the space to accumulate the debris particles, thereby increasing the removal rate. The variation in the dielectric flow-field greatly affects the debris flushing from the IEG. The trajectory of the debris particles depends on their initial position in the IEG and they cool rapidly, which is validated using simulation and mathematical approach.

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“…Applying vibration is a known technique to improve the efficiency of the process in a wide range of unconventional machining such as magnetic abrasive finishing (MAF), ultrasonic, electro discharge machining (EDM) and so on. In different machining methods depending on the process, the vibration is imposed on the tool, workpiece or both (Brehl and Dow, 2008; Kumar et al , 2014; Lee et al , 2015; Radhakrishnan and Vijayaraghavan, 2017; Yang et al , 2020; Xu and Zhang, 2015; Maity and Choubey, 2016; Beigmoradi et al , 2018).…”

Section: Introductionmentioning

confidence: 99%

Investigation of vibratory bed effect on abrasive drag finishing: a DEM study

Beigmoradi

Vahdati

2021

WJE

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Purpose The purpose of this paper is to investigate the effect of a vibratory bed, as an assistant agent, on the improvement of the drag finishing process. The dynamics and kinematic of the process were surveyed in microscale for different frequencies and amplitudes and the results were compared to the basic process. Design/methodology/approach The discrete element tool was used to find out the effect of the vibratory bed on the drag finishing process. To this end, the Hertz-Mindlin model was used to investigate the contact of abrasive particles and workpiece. At the first stage, the numerical model was validated with the experimental results, and then the effect of different parameters on the finishing process was evaluated and compared with the basic case. Findings The chosen numerical model was in good agreement with the results measured in the previous literature. Moreover, the results show that not only vibrated bed enhances the contacts of abrasive particles to the workpiece, but it also increases the uniformity of the finished surface. Originality/value In comparison to the experiments, the discrete element technique consumes lower cost and time to estimate the optimum conditions of the finishing process, as well as it provides a good understanding of this phenomenon on the micro-scale.

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Optimum design of vibratory electrode in micro-EDM process

Cited by 11 publications

References 16 publications

Influence of tool materials on surface modification using μEDC process

Influence of tool materials on surface modification using μEDC process

Simulation of flow-field and debris temperature analysis in micro-electrical discharge milling using slotted tools

Investigation of vibratory bed effect on abrasive drag finishing: a DEM study

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