Improving Machining Performance for Deep Hole Drilling in the Electrical Discharge Machining Process Using a Step Cylindrical Electrode

Jamkamon, Kamonpong; Janmanee, Pichai

doi:10.3390/app11052084

Cited by 14 publications

(18 citation statements)

References 49 publications

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“…In addition, the stepped electrode increased the width of the annular gap; as a result, the debris clogged at the side gap had no influence on the discharging process, and the chance of abnormal discharge and secondary discharge was reduced. Similar experiments were also conducted by Jamkamon and Janmanee [107]. The SR of the side wall of the machined hole was higher when using the stepped electrode because the secondary discharge on the side area had been reduced.…”

Section: The Effects Of Tool Electrodessupporting

confidence: 66%

The state of the art of electrical discharge drilling: a review

Mao

Almeida

et al. 2022

Int J Adv Manuf Technol

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Electrical discharge machining (EDM) is one of the most widely used non-conventional methods to machine electrically conductive materials in the manufacturing industry because of its strong capability in machining difficult-to-cut materials irrespective of their strength and hardness. Electrical discharge drilling (EDD) is an important variant of EDM. Due to the limitation of conventional drilling processes, special holes, particular those with high aspect ratios on hard-to-cut materials, can only be drilled by EDD. Extensive research has been carried out to improve the efficiency and quality of the EDD process by using different approaches, such as assisted EDD and powder-mixed EDM drilling aiming to improve the material removal rate (MRR), tool wear rate (TWR), surface quality and accuracy. This paper provides a comprehensive review of the EDD process. Different methods were compared; the advantages and disadvantages of each process were summarised; state-of-the-art technologies and the latest development were introduced, and research trends and new directions were presented.

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Section: The Effects Of Tool Electrodessupporting

confidence: 66%

The state of the art of electrical discharge drilling: a review

Mao

Almeida

et al. 2022

Int J Adv Manuf Technol

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“…The composite electrode can alter the surface measures in the EDM process [18]. The size and shape of the tool electrode can change the material removal mechanism in the process [19]. The heat-treated tool electrode can change the surface topography of the machined specimen [20].…”

Section: Introductionmentioning

confidence: 99%

Influence of Adaptive Gap Control Mechanism and Tool Electrodes on Machining Titanium (Ti-6Al-4V) Alloy in EDM Process

et al. 2022

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Titanium alloy is widely used for orthodontic technology and easily machined using the EDM process. In the EDM process, the workpiece and tool electrode must be separated by a continuous air gap during the machining operation to generate discharge energy in this method. In the present study, an endeavor was made to analyze the effects of a servo feed air gap control and tool electrode in the EDM process. The developed mechanical setup consists of a linear action movement with zero backlash along the X-axis, which can be controlled up to 0.03 mm. It was observed that the suggested air gap control scheme can enhance the servo feed mechanism on a machining titanium alloy. A tungsten carbide electrode can enhance the surface measures owing to its ability to produce tiny craters with uniform distribution. Since it produces a little crater and has a higher melting point, a tungsten carbide electrode can create lesser surface roughness than a copper tool and brass tool electrode.

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“…The main and essential factors for efficiency in material processing include workpiece material, electrode material, experimental conditions such as duty factor, gap, pulse current and open circuit voltage, fluid dielectric substances, etc. [3,4]. The cutting tools, called electrodes, for the EDM process are essential.…”

Section: Introductionmentioning

confidence: 99%

“…The cutting tools, called electrodes, for the EDM process are essential. It is important to consider the appropriate use for the workpiece material, especially with special hardness material such as tungsten carbide, which is difficult to form due to its high hardness and high melting point [3][4][5]. Therefore, it is imperative to select the appropriate electrode material in order to obtain good results after processing in terms of precision in both size and surface roughness, as well as workpiece surfaces free from small cracks [4].…”

Section: Introductionmentioning

confidence: 99%

“…It is important to consider the appropriate use for the workpiece material, especially with special hardness material such as tungsten carbide, which is difficult to form due to its high hardness and high melting point [3][4][5]. Therefore, it is imperative to select the appropriate electrode material in order to obtain good results after processing in terms of precision in both size and surface roughness, as well as workpiece surfaces free from small cracks [4]. In workpiece material processing with EDM, the selection of electrode materials, both solid and powder sintered, is considered to increase efficiency in optimal processing [5].…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of Ternary Metal (Cu-Ni-TiN) Electrodes Used in an Electrical Discharge Machining Process

Saodaen

Janmanee

Rodchanarowan

2021

Metals

Self Cite

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In the industrial field, electric discharge machining (EDM) is the most commonly used non-traditional machining process because it has the potential to machine electrically conductive materials of high hardness. To satisfy the need for rapid and economical fabrication of EDM electrodes, techniques that use the addition of more metal in the manufacturing process are gaining in popularity. This study presents an investigation of the characterization of ternary metals (Cu–Ni–TiN) for EDM electrodes by using powder metallurgy, which leads to enhancement of the mechanical properties, such as the hardness, electrical properties, and other properties, for the formation of Cu in Ni-TiN electrodes using a cold press at pressures of 18, 20, and 22 MPa. The influences of the parameters of this process were identified for the betterment of Cu–Ni–TiN on the surface. The specimens were calcined in a furnace at 1100 °C for 1 h, with a mixture of argon and hydrogen gas as a controlled gas in the ratio of 95:5. The specimens were investigated in terms of hardness, electric resistivity, apparent density, and porosity. The results show that the 80% Cu–3% Ni–17% TiN electrode at 18 MPa had the highest hardness (124.38 HV) and the lowest electric resistivity (0.39188 cm), while the specimen increased Cu with a ratio of 85% Cu–3% Ni–12% TiN, and a pressure of 20 MPa was found to have the highest density (8.5472 g/cm3) and the lowest porosity (6.2922%). As a further confirmation of the above results, the X-ray diffraction (XRD) patterns of the surfaces of the specimens exhibited major phases that supported the ternary Cu–Ni–TiN phase. However, we also achieved the successful use of Cu–Ni–TiN electrodes as a titanium source (as an alternative to the conventional metal powder) to provide a novel approach to fabricating composite electrodes through the EDM process.

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Improving Machining Performance for Deep Hole Drilling in the Electrical Discharge Machining Process Using a Step Cylindrical Electrode

Cited by 14 publications

References 49 publications

The state of the art of electrical discharge drilling: a review

The state of the art of electrical discharge drilling: a review

Influence of Adaptive Gap Control Mechanism and Tool Electrodes on Machining Titanium (Ti-6Al-4V) Alloy in EDM Process

Characteristics of Ternary Metal (Cu-Ni-TiN) Electrodes Used in an Electrical Discharge Machining Process

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