The Performance of RBD Palm Oil Dielectric Fluid in Comparison with Kerosene in Electrical Discharge Machining (EDM) Process

2021 ◽  
pp. 983-995
Author(s):  
Aiman Supawi ◽  
Said Ahmad ◽  
Nurul Farahin Mohd Joharudin ◽  
Nuraishah Nadhirah Ahmad Idhan
Keyword(s):  
Palm Oil ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Dielectric Fluid ◽  
Rbd Palm Oil ◽  
Edm Process

An Investigation into Surface Roughness of EDM Using Soft Particles Suspension in Silicone Oil

2008 ◽  
Vol 389-390 ◽  
pp. 430-435 ◽  
Author(s):  
Yao Yang Tsai ◽  
Chih Kang Chang
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Silicone Oil ◽  
Experimental Result ◽  
Dielectric Fluid ◽  
Polymer Particles ◽  
Hard Particles ◽  
Soft Particles ◽  
Edm Process

Electrical discharge machining (EDM) is an excellent technology to machining die and mold, but it is uneasy to obtain mirror-like surface. Powder-Mixed dielectric electrical discharge machining (PMD-EDM) is the innovative technology of EDM process, which can improve the quality of machined surface and applied in EDM finish machining now. The powder is usually hard particles, such as Al, Cu, Cr and Si in PMD-EDM. This paper presents a new research of PMD-EDM with suspending soft particles and abrasive grits in the dielectric fluid, especially focus on surface roughness. Experimental result shows the EDM process with polymer particles and abrasive grits can be carried out in silicone oil and the surface roughness has the finer improvement when increasing the rotation speed. Also, the effect of hard particles suspending in dielectric fluid are also discussed and compared. The surface roughness using polymer particles and abrasive in specific condition was better than only hard particles in silicone oil. Moreover, mixing abrasive and polymer in EDM can perform the polishing process.

scholarly journals Electrical Discharge Machining: Vital to Manufacturing Industries

2019 ◽  
Vol 8 (11) ◽  
pp. 1696-1701 ◽  
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Manufacturing Industries ◽  
Potential Difference ◽  
Machining Process ◽  
Dielectric Fluid ◽  
Conventional Process ◽  
Edm Process ◽  
State Of Art ◽  
Process Material

This paper presents an insight of state of art of electrical discharge machining process. In this process, material gets eroded from the workpiece because of chain of speedily repeating current discharges amidst twin electrodes, which are parted by dielectric fluid and made prone to a potential difference. This process offers various advantages over conventional process and finds wide applications in various industries. The information provided in this study will be very useful for the beginners to understand the basic fundamentals of unconventional EDM process

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

2011 ◽  
Vol 264-265 ◽  
pp. 956-961 ◽  
Author(s):  
Md. Ashikur Rahman Khan ◽  
M.M. Rahman ◽  
M.M. Noor ◽  
K. Kadirgama ◽  
M.A. Maleque
Keyword(s):  
Surface Finish ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Research Trends ◽  
Dielectric Fluid ◽  
Electrically Conductive ◽  
Conventional Machining ◽  
Edm Process ◽  
Dies And Moulds

Electrical discharge machining (EDM) technique has been widely used in modern metal working industry for producing complex cavities in dies and moulds, which are otherwise difficult to create by conventional machining. The process has the advantage of being able to machine hardened tool steels. However, its low machining efficiency and poor surface finish restricted its further applications. To address these problems, one relatively new technique used to improve the efficiency and surface finish is EDM in the presence of powder suspended in the dielectric fluid. Powder mixed electric discharge machining (PMEDM) is one of the recent innovations for the enhancement of capabilities of EDM process. In PMEDM, the electrically conductive powder is mixed in the dielectric fluid of EDM, which reduces the insulating strength of the dielectric fluid and increases the spark gap between the tool and workpiece. As a result, the process becomes more stable, thereby, improving the material removal rate (MRR) and surface finish. Moreover, the surface develops high resistance to corrosion and abrasion. This paper presents the current research trends on dry, near dry EDM and review on research carried out in the area of PMEDM.

Surface Modification of SKD 61 by Electrical Discharge Coating (EDM/EDC) with Multilayer Cylindrical Electrode and Jatropha Curcas as Dielectric Fluid

2013 ◽  
Vol 319 ◽  
pp. 96-101 ◽  
Author(s):  
Dedi Priadi ◽  
Triyono Pawiro ◽  
Eddy S. Siradj ◽  
Winarto
Keyword(s):  
Jatropha Curcas ◽  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
White Layer ◽  
Dielectric Strength ◽  
Dielectric Fluid ◽  
Conventional Material ◽  
Removal Processes ◽  
Edm Process

Electrical Discharge Machining (EDM) is the most extensive non-conventional material removal processes used. In recent years, EDM researchers have been explore several sparking efficiency improvement methods including some unique experimental concepts that begin from the EDM traditional sparking phenomenon. This paper reports the use of layered cylindrical electrodes combined with jatropha curcas as dielectric fluid which is not widely used in the EDM process. The results are compared with the EDM process using kerosene dielectric fluid and single electrode (conventional). Dielectric fluid jatropha curcas is expected to substitute the commonly used dielectric fluid. Dielectric strength was tested by the impulse method. Furthermore, the EDM process is measured using surface roughness and microhardness of white layer values at various cutting conditions on the material SKD 61 as an indicator. The highest value of white layer hardness using jatropha curcas dielectric fluid is provided by three layers of electrodes, whereas the lowest is resulted of two layers of electrodes. Meanwhile, the use of kerosene dielectric fluid, the highest hardness value is achieved by two layers of electrodes, and the lowest is produced by three layers of electrodes. This study shows that jatropha curcas dielectric fluid is potential to be used in the EDM process since it produces a smoother surface and higher white layer hardness value.

scholarly journals Investigation into effects/Investigating the effects of titanium powder concentrations mixed in dielectric fluid on material machining removal and surface roughness of SKD61 steel after electrical discharge machining by reverse electrode polarity

2015 ◽  
Vol 18 (2) ◽  
pp. 43-51
Author(s):  
Long Tien Banh ◽  
Cuong Ngo ◽  
Phan Huu Nguyen
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge ◽  
Material Removal ◽  
Titanium Powder ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Dielectric Fluid ◽  
Electrode Polarity ◽  
Edm Process

Electrical discharge machining (EDM) has found widespread applications in tool , mold and aerospace industries. Therefore, enhancement of the quality of the EDM process has become a major research concern. In this paper, the effect of various titanium powder concentrations on the Material Removal Rate (MRR), tool wear rate (TWR), surface roughness (Ra) in powder mixed electrical discharge machining (PMEDM) have been studied. The workpiece is SKD61steel and electrode made from copper with reverse polarity were used in experimental study. The results showed that titanium powder mixed into the dielectric fluid of EDM can enhance MRR without increasing TWR and Ra.

The Effects of Dielectric Fluid Viscousity on Chips Formation Rate and Electrode Wear Rate in Electrical Discharge Machining of SKD 61 Steel

2018 ◽  
Vol 929 ◽  
pp. 177-185 ◽  
Author(s):  
Triyono ◽  
Joko Riyono ◽  
Nur Fadli ◽  
Daisman Purnomo Bayyu Aji
Keyword(s):  
Wear Rate ◽  
Jatropha Curcas ◽  
Electrical Discharge ◽  
Metal Removal ◽  
Electrical Discharge Machining ◽  
Formation Rate ◽  
Dielectric Fluid ◽  
Electrode Wear ◽  
Fluid Mixture ◽  
Edm Process

Electrical Discharge Machining (EDM) is a machine for cutting workpieces with thermal energy derived from electrical spark from tool (cathode) to workpiece (anode). As EDM process requires a dielectric fluid in the cutting operation, the characteristics of the dielectric fluid play an essential role for obtaining excellent cutting. Jatropha curcas has been demonstrated for use as a dielectric fluid in EDM process. However, the drawback is that the Rate of Metal Removal (RMR) is lower than that of generally-used dielectric fluid in industry. We consider that the cause is a much higher viscousity of the jatropha curcas. This study was conducted to investigate the characteristics of a new dielectric fluid mixture of jatropha curcas and kerosene. Kerosene was used in the mixture to reduce the viscousity of the jatropha curcas since the kerosene has a much lower viscousity. The measurement of the viscousity of the fluid mixture was performed using an Ostwald viscousimeter. Evidently, when the jatropha curcas mixed with the kerosine the viscousity of the mixture is lower than that of the pure jatropha curcas. The effects of the viscousity of the fluid mixture were investigated by measuring the RMR and Tool Wear Rate (TWR). The RMR and TWR were determined by calculating the difference in the weight of the workpiece and the tool, respectively, before and after the cutting for a certain cutting interval. The measurements were carried out for eleven different concentration of the fluid mixture by varying the current of 15 and 21 Amp, with replication of 3 times. As the result, the energy released during the cutting process affects the values of TWR and RMR. It was also found that in contrast to the effect on TWR, the RMR was not influenced by the viscousity of the mixture.

A Study on Influence of Input Parameters on Surface Roughness in PMEDM Cylindrical Shaped Parts

2021 ◽  
Vol 1018 ◽  
pp. 65-70
Author(s):  
Tran Thi Hong ◽  
Bui Thanh Danh ◽  
Nguyen Van Cuong ◽  
Le Hong Ky ◽  
Nguyen Hong Linh ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Dielectric Fluid ◽  
Carbide Powder ◽  
Improve Quality ◽  
Input Parameters ◽  
Edm Process ◽  
Optimum Input

In electrical discharge machining (EDM) powder material can be mixed into the dielectric fluid to improve quality of machining surface of components. Therefore, finding suitable input parameters of this process becomes an important task. This paper presents a methodology to find the optimum input factors of the EDM process when adding nanosilicon carbide powder into the dielectric fluid for processing cylindrical shaped parts. In this research, the Taguchi method was used for experiment design in order to investigate the effect of the input parameters on the surface roughness. Also, optimum input factors for minimum surface roughness (RS) was proposed. The result from the deviation of SRbetween the analysis and the experiment demonstrates that the optimum input parameters are helpful to predict the value of surface roughness. Therefore, this can increase the economic and technical effectiveness in EDM process.

Investigation of the Spark Cycle Effect on Material Removal Rate in Wire Electrical Discharge Machining

Manufacturing ◽  
2003 ◽  
Author(s):  
Scott F. Miller ◽  
Albert J. Shih
Keyword(s):  
Process Parameters ◽  
Material Removal Rate ◽  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Short Circuit ◽  
Wire Electrical Discharge Machining ◽  
Time Duration ◽  
Edm Process

The development of new, advanced engineering materials and the needs for precise and flexible prototype and low-volume production have made wire electrical discharge machining (EDM) an important manufacturing process to meet such demand. This research investigates the effect of spark on-time duration and spark on-time ratio, two important EDM process parameters, on the material removal rate (MRR) and surface integrity of four types of advanced material: porous metal foams, metal bond diamond grinding wheels, sintered Nd-Fe-B magnets, and carbon-carbon bipolar plates. An experimental procedure was developed. During the wire EDM, five types of constraints on the MRR due to short circuit, wire breakage, machine slide speed limit, and spark on-time upper and lower limits have been identified. An envelope of feasible EDM process parameters is created and compared across different work-materials. Applications of such process envelope to select process parameters for maximum MRR and for machining of micro features are presented.

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