Current Research Trends on Dry, Near-Dry and Powder Mixed Electrical Discharge Machining

Khan, Md. Ashikur Rahman; Rahman, M. M.; Noor, M. M.; Kadirgama, K.; Maleque, Abdul

doi:10.4028/www.scientific.net/amr.264-265.956

Cited by 9 publications

(8 citation statements)

References 22 publications

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“…The research on the processing of non-conductive materials was also conducted at several research centers in Malaysia. The work published by the research team under the supervision of Dr. Muhammed Abdul Maleque at the International Islamic University of Malaysia (Kuala Lumpur) [76] demonstrated the results of the processing of technical ZrO 2 , wholly covered with a casing of platinum copper. The obtained result proved the ability and effectiveness of EDM processing in kerosene; copper residues from the surface of the ceramic workpiece were successfully removed.…”

Section: The Main Scientific Competitorsmentioning

confidence: 94%

On Electrical Discharge Machining of Non-Conductive Ceramics: A Review

et al. 2019

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The inability of ceramic and nanoceramic processing without expensive diamond tools and with a high-material-removal rate hampers the scope of its potential applications and does not allow humanity to make a full shift to the sixth technological paradigm associated with Kuhn scientific revolutions and Kondratieff's waves and restrains the growth of the economy. The authors completed a review on the research state of ceramic and nanoceramic processing by electrical discharge machining, which is possibly solved by two principal approaches associated with the usage of standard commercially available machine tools. The first approach is related to the introduction of expensive secondary phase; the second approach proposes initiate processing by adding auxiliary electrodes in the form of coating, suspension, aerosol, or 3D-printed layer based on the components of silver, copper, or graphite in combination with an improved dielectric oil environment by introducing graphite or carbon nanoparticles, which is hugely relevant today.Technologies 2019, 7, 55 2 of 16 of cutting tools limits the resulting geometry of the product. Other machining methods such as vibroacoustic machining, laser and electron beam scribing, selective laser sintering with a binder, find their specific place in the processing of ceramics. However, they do not allow the receiving of all geometrically possible shapes of the product without losses on the operational parameters of ceramics [16][17][18].One of the most popular methods for the production of parts, regardless of their hardness, is electrical discharge machining (EDM). However, it requires the material to be conductive [19][20][21]. The process of electrical erosion of the material consists of initiating electric pulses in the interelectrode gap, in the breakdown of the dielectric medium in the gap, in establishing a discharge channel, where the temperature reaches more than 10,000 • C (low-temperature plasma). Due to such temperatures, the material is ablated, the drops of cooled material as eroded debris are washed away by the flow of the dielectric medium, and the electrodes again approach to resume the cycle. Thus, a unique crater-like topology on the surface of the workpiece is created [22][23][24][25].The inability of ceramics and nanoceramics to conduct current hampers the scope of its potential applications and restrains the growth of the progress and the switch to the next technological paradigm that most of the scientists associate with the term "nano" [26][27][28][29][30][31][32].Thus, it can be concluded that the study and development of a method for electrical discharge machining of non-conductive ceramics and nanoceramics are incredibly relevant today.The authors propose to apply the dialectical approach of cognition as a scientific approach to solve the formulated scientific problem. The dialectical approach includes the systematization and updating of existing knowledge and new data about the object of research.

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Section: The Main Scientific Competitorsmentioning

confidence: 94%

On Electrical Discharge Machining of Non-Conductive Ceramics: A Review

et al. 2019

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“…The die sinking electrical discharge machining is the most widely used techniques for replication of products such as die-casting, injection moulding, etc [73][74][75]. It is also better known as the cavity type EDM or volume EDM.…”

Section: Die Sinking Edmmentioning

confidence: 99%

“…The electrical discharge machining has various process parameters that affect the performance parameters surface roughness and recasts layer thickness and material removal rate [73,[104][105][106]. The quality of component is solely affected by the process parameters.…”

Section: Influence Of Process Parametersmentioning

confidence: 99%

A review on machining of metal matrix composites using nanoparticle mixed dielectric in electro-discharge machining

Mohanty¹,

Routara²

2016

Int. J. Automot. Mech. Eng.

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The growth in the new advanced materials that are harder till date have led to the improvement of technologies used to machine them. Nowadays, new materials have been developed to be used in different sectors where lighter and harder materials are in vast requirement. Moreover, materials machined with high precision machine tools have to provide the greatest surface finish such that it catches the pace with other competitive materials. Research has shown that the electro-discharge machining (EDM) is the only machine tool that has created history in machining hard materials. In the recent years, metal matrix composites (MMCs) have an increasing demand in the industries since they are hard materials to machine and a good finish is required in the aerospace, marine, aircraft, nuclear and other similar industries. Thus, EDM has gained fame in machining MMCs. With due course, the powder mixed electro-discharge machining (PMEDM) has created efficient EDM, with the use of powders in the dielectric. The dielectric mixed EDM has been used for efficient material removal rate (MRR). With the change in technologies, the sizes of powders that have to be added in the dielectric fluid go on decreasing. In this review, studies by numerous researchers on the MMCs that are machined with the use of PMEDM are mentioned. The powders used in the experimentation are of nano size. Furthermore, the optimization technique used by the researchers is discussed in the present study.

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“…Titanium and titanium alloys present several excellent properties such as very high strength-to-weight ratio, excellent corrosion resistance, light weight and the ability to maintain their properties at extremely high temperatures [1][2][3][4][5][6]. Research on the surface integrity and surface finish of titanium alloys is becoming more significant for the aerospace industries as it is used to produce high quality machined surface components and requires high accuracy [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Surface Finish when Threading Titanium-Based Alloy under Dry Machining

Hamdan¹,

Yasir²,

Saïd³

et al. 2014

J MECH ENG SCI

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This paper discusses the quality of surface finish when threading titanium-based alloy under dry condition. The quality of surface finish was studied at various cutting parameters and at the two extreme stages of the machining process, i.e. at the beginning and end of the process. The objective is to evaluate the effect of a worn-out tool on the quality of surface finish. PVD-coated carbide tools were used in this study. Experiments were conducted at two cutting speeds, 35 and 55 m/min, two depths of cut, 0.2 and 0.25 mm, and a constant pitch of 2.0 mm. The tool wear and the quality of surface finish were inspected visually by microscope. The tool's flank wear was measured gradually and machining was stopped when the flank wear reached the rejection criterion of0.3 mm. The microstructure beneath the machined surface was also evaluated. It was found that, at the beginning of machining, there was only a feed mark on the surface finish. When the machining was prolonged until the tools reached the rejection criterion, a bad surface finish was produced. Metal debris, surface cavities and a boundary crack were observed. Results show that machining with a worn-out tool can cause microstructure alteration beneath the machined surface. The selection of cutting parameters and monitoring of tool wear are crucial in order to obtain a good surface finish. Characterization of the surface finish with respect to the threading process under a dry condition would ultimately help in the development of suitable parameters for machining titanium-based alloys.

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Current Research Trends on Dry, Near-Dry and Powder Mixed Electrical Discharge Machining

Cited by 9 publications

References 22 publications

On Electrical Discharge Machining of Non-Conductive Ceramics: A Review

On Electrical Discharge Machining of Non-Conductive Ceramics: A Review

A review on machining of metal matrix composites using nanoparticle mixed dielectric in electro-discharge machining

Surface Finish when Threading Titanium-Based Alloy under Dry Machining

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