Characterizing the Effects of Micro Electrical Discharge Machining Parameters on Material Removal Rate during Micro EDM Drilling of Tungsten Carbide (WC-Co)

Hourmand, Mehdi; Sarhan, Ahmed A.D.; Sayuti, M.

doi:10.1088/1757-899x/241/1/012005

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…Consequently, various studies have been performed on the EDM of tungsten carbide. Studies by Hourmand et al [ 8 ] and Assarzadeh et al [ 9 ] have used analytical models, such as response surface methodology and ANOVA analysis, to determine the optimum parameter values of peak current, spark time on and off, and gap voltage. Research on the effect of EDM on hardness and sub-surface damage on tungsten carbide has also been performed [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Micro Electrical Discharge Machining of Ultrafine Particle Type Tungsten Carbide Using Dielectrics Mixed with Various Powders

Gattu

Yan

2022

Micromachines

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Electrical discharge machining (EDM) is widely used to machine hard materials, such as tungsten carbide; however, the machining rate and surface quality are low. In this research, the effects of mixing electrically conductive carbon nanofiber (CnF), semiconductive silicon (Si) powder, and insulative alumina powder (Al2O3) at different concentrations in a dielectric fluid were studied by observing single discharge craters and hole machining performance in the EDM of ultrafine particle type tungsten carbide. Craters obtained using carbon nanofiber and alumina were much smaller than in oil-only conditions. In contrast, The results show that adding CnF significantly improved the material removal rate under all conditions. Si and Al2O3 powders only improved the machining performance at a high discharge energy of 110 V. Furthermore, improvement in surface roughness was observed prominently at high voltages for all the powders. Among the three powders, alumina was found to improve the surface roughness the most.

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Section: Introductionmentioning

confidence: 99%

Micro Electrical Discharge Machining of Ultrafine Particle Type Tungsten Carbide Using Dielectrics Mixed with Various Powders

Gattu

Yan

2022

Micromachines

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“…Microstructure fabrication uses micro-machining technology having distinctive advantages, e.g., require less material and energy, as well as occupying minimum space. Microtools are widely used for machining of micro-parts and components with various shapes using conventional and non-conventional processes, for instance, micro-drilling, micro-punching, micro-milling [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of micro-rods machined using reverse micro-EDM

Singh

Patowari

Deshpande

2018

J Braz. Soc. Mech. Sci. Eng.

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In today's world, microstructures have a wide range of applications in the field of biomedical devices, aerospace engineering, MEMS device elements, etc. In the recent years, reverse micro-electro-discharge machining (R-µEDM) has evolved from µEDM that has become one of the promising technologies to fabricate precise components and microstructures of various shapes with high aspect ratio. In this work, micro-tools (rods) of average size (diameter) 182 µm have been machined using copper sheet from bulk tungsten rod of 800 µm diameter by R-µEDM process. Moreover, Taguchi's L16 orthogonal array has also been applied for designing the experiments. Feed rate, capacitance and voltage are considered as the parameters of the process. The response parameters such as machining time, erosion rate and dimensional variation have been analyzed in detail for different combinations of the process parameters. It is a well-known fact that the tool wear is the main culprit and responsible for the error in the micro-rods. Dimensional error has been quantified over the entire length of the micro-rods through the measurement process, and the minimum standard deviation is found to be 1.13 µm at a feed rate of 5 µm/s, capacitance of 1000 pF and voltage of 120 V. Further, machining data have been collected in real time and the behavior of machining time with work feed has been studied. In addition to it, a simple analytical model has been developed for calculating the erosion rate and it is seen that voltage produces more effect on erosion rate and machining time than the other parameters. Additionally, using the feed rate, capacitance and voltage at which minimum deviation took place, an array of 4 × 4, i.e., 16 micro-rods with 58 µm diameter and 830 µm length, has been fabricated on the bulk tungsten rod of 800 µm diameter.

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Review on role of electrical discharge drilling methods in fabricating micro holes: formation mechanism, defects characterization and mitigation strategies

Sun,

Junyi

et al. 2024

Arch. Civ. Mech. Eng.

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Characterizing the Effects of Micro Electrical Discharge Machining Parameters on Material Removal Rate during Micro EDM Drilling of Tungsten Carbide (WC-Co)

Cited by 7 publications

References 7 publications

Micro Electrical Discharge Machining of Ultrafine Particle Type Tungsten Carbide Using Dielectrics Mixed with Various Powders

Micro Electrical Discharge Machining of Ultrafine Particle Type Tungsten Carbide Using Dielectrics Mixed with Various Powders

Analysis of micro-rods machined using reverse micro-EDM

Review on role of electrical discharge drilling methods in fabricating micro holes: formation mechanism, defects characterization and mitigation strategies

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