Analysis of Electrical Discharge Machining Using Water as Dielectric and Diverse Electrode Materials

2008 ◽  
Author(s):  
Hugo Medellin ◽  
Aaro´n Flores ◽  
Jorge Morales ◽  
Alonso de la Garza
Keyword(s):  
Electrical Discharge ◽  
Electrode Materials ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Low Carbon Steel ◽  
Electrode Wear ◽  
Low Carbon ◽  
Source Voltage ◽  
Materials Used ◽  
Edm Process

This paper presents an experimental investigation carried out to study the performance of electrical discharge machining (EDM) using water as dielectric. This experimentation was performed using different types of water as dielectric, several electrode materials and two different workpiece materials. The electrode materials used in the experimentation were bronze, brass, copper, aluminium and steel; and the workpiece materials used were ASTM A36 mild (low-carbon) steel and D-2 tool steel. A new desktop size EDM machine to perform the experiments was designed and is presented in this paper. After performing the experimentation, the results have shown that the best EDM performance is achieved with brass and bronze electrodes using a mixture of 75% tap and 25% deionised water as dielectric. The results also indicate that the material removal rate and the electrode wear are proportional to the source voltage used in the EDM process. Finally, a forming die with a complex shape used in a jewellery industry, was manufactured using the EDM system presented in this paper.

A Study Comparative of Cu and Cu-Zn Electrode during Electrical Discharge Machining on Martensitic Stainless Steel AISI 410

2014 ◽  
Vol 931-932 ◽  
pp. 327-332 ◽  
Author(s):  
Rattikorn Saodaen ◽  
Pichai Janmanee ◽  
Somchai Wonthaisong ◽  
Apiwat Muttamara
Keyword(s):  
Electrical Discharge ◽  
Electrode Materials ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
White Layer ◽  
Open Circuit ◽  
Electrode Wear ◽  
Workpiece Material ◽  
Steel Aisi ◽  
Open Circuit Voltages

The objective of this research is to study comparisons of Cu and CuZn electrodes, during Electrical Discharge Machining (EDM) of martensitic stainless AISI 410. The workpiece material was a rectangular plate, measuring 30x50x5 mm. The conditions of the EDM process were 3.0mm depth and 2.0 mm diameter, with variables of parameter being: currents, on/off-times and open circuit voltages of spark. Evaluation of the electrical discharge was conducted using Material Removal Rate (MRR), Electrode Wear Ratios (EWR) and Arithmetical Mean Roughness (Ra), respectively. The results found that CuZn electrode materials provide higher MRR and EWR than electrode materials of Cu. Also, when considering the melting of white layer, initial melts found that the white layer surface material is also good for the integrity of the state park, and it was additionally also found that when the current level increases, then that will rise accordingly.

Effects of Cu-Zn-Ni Electrode during EDM of SUS 304 Material

2014 ◽  
Vol 590 ◽  
pp. 202-206
Author(s):  
Pichai Janmanee ◽  
Suppawat Chuvaree ◽  
Jamkamon Kamonpong
Keyword(s):  
Electrode Materials ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Structural Features ◽  
Electrode Wear ◽  
Element Analysis ◽  
Wear Ratio ◽  
Pulse On Time ◽  
Pulse Off Time ◽  
Edm Process

In this study, experiments were performed to study the effects of electrode materials mixed with nickel in electrical discharge machining (EDM) of SUS 304 material. Experiments were constructed using parameters consisting of pulse-on time, pulse-off time, discharge current and electrode polarity, respectively. The analysis of structural features of the surface was accomplished using a scanning electron microscope (SEM) as well as an element analysis created on the surface, after the EDM process, by using Energy-dispersive x-ray spectroscopy (EDS). The results of the experiments found that nickel elements in the electrode material have an effect on the working performance of material removal rate and electrode wear ratio. The electrode wear ratio reduces when nickel elements increase. Moreover, the surface roughness had the lowest level at electrode 15 % nickel element. Thus, electrode wear during the EDM process of nickel element from electrodes and other elements, combined with surface metalworking, becomes a recast layer of nickel.

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.

Einsatz eines naturanalogen Algorithmus/Application of a natural analogue algorithm – Reproducible optimization of electrical-discharge drilling

2020 ◽  
Vol 110 (07-08) ◽  
pp. 467-470
Author(s):  
Eckart Uhlmann ◽  
Mitchel Polte ◽  
Jan Streckenbach ◽  
Mirsad Osmanovic ◽  
Julian Börnstein
Keyword(s):  
Industrial Application ◽  
Electrical Discharge ◽  
Electrode Materials ◽  
Electrical Discharge Machining ◽  
Optimization Method ◽  
Hardened Steel ◽  
Evolution Strategy ◽  
Natural Analogue ◽  
Electrical Discharge Drilling ◽  
Materials Used

Dieser Beitrag stellt die Ergebnisse zur Untersuchung der Reproduzierbarkeit des Optimierungsverfahrens Evolutionsstrategie (ES) am Beispiel des funkenerosiven Bohrens vor. Dazu wurden zwei ES-Typen untersucht. Als Elektrodenwerkstoffe kamen Messing für das Werkzeug und für das Werkstück gehärteter Stahl zum Einsatz. Im Ergebnis konnte die Erosionsdauer reproduzierbar um 37 % verringert werden. Dieser Nachweis bildet die Grundlage für den industriellen Einsatz der Evolutionsstrategie beim funkenerosiven Bohren.   This article describes the results of the investigation on the reproducibility of the optimization method of evolution strategy (ES), exemplified by electrical-discharge drilling. Two types of ES were examined. The electrode materials used were brass for the tool and hardened steel for the workpiece. The erosion duration could be reduced by 37 % in a reproduceable manner. This verification is the basis for the industrial application of the ES for the optimization of electrical discharge machining.

Deep Hole of AISI P20 Mold Steel Material by Electrical Discharge Machining

2014 ◽  
Vol 590 ◽  
pp. 244-248
Author(s):  
Jamkamon Kamonpong ◽  
Pichai Janmanee
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Side Surface ◽  
Copper Electrode ◽  
Electrode Wear ◽  
Steel Material ◽  
Suitable Parameter ◽  
Aisi P20 ◽  
Off Time

This research aimed to study the machining efficiency of AISI P20 steel by Electrical Discharge Machining (EDM) using rod copper electrode to machining material by 50 mm depth of machining was mainly assessed from Materials Removal Rate (MRR) and Electrode Wear Ratio (EWR). From the experiment designed to use Taguchi technique of data analysis and suitable parameter prediction, the highest MRR was at on-time of 150 μs, off-time of 2 μs and electric current level was at 15 A or 0.25 A/mm2. Predicted value was at 19.2395 mm3/min which was equal to real experiment, showing Materials Removal Rate of 19.647 mm3/min (with error of 2.12 percent) .Moreover, it was found that gap would increase with the size of electrode and depth of machining caused by movement of particles removed from side surface of electrode, which cause micro sparks at the side of the material workpiece.

The effect of magnesium content on drilling of Al-Mg-Ti alloy by hole electrical discharge machining process

2020 ◽  
Vol 235 (1-2) ◽  
pp. 125-133
Author(s):  
Omer Eyercioglu ◽  
Kursad Gov
Keyword(s):  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Magnesium Content ◽  
Machining Process ◽  
Electrode Wear ◽  
Ti Alloy ◽  
Ti Alloys ◽  
Mg Content

This study presents an experimental investigation of small hole electrical discharge machining of Al-Mg-Ti alloys. A series of drilling operations were carried out for exploring the effect of magnesium content. Holes of 2 mm diameter and 15 mm depth were drilled using tubular single-hole rotary brass electrodes. The rates of material removal and electrode wear, surface roughness, overcut, average recast layer thickness, taper height and angle were studied for Al-Mg-Ti alloys contain 2%, 4%, 6%, 8%, 10%, 12%, and 14% Mg. The results show that the material removal rate is increasing with increasing Mg content while the rate of electrode wear is almost unchanged. Due to decreasing the melting temperature of the Al-Mg-Ti alloy with increasing Mg content, more metal melts and vaporizes during electrical discharge machining drilling. Therefore, more overcut and taper, thicker white layer, and rougher surfaces were measured for higher Mg content.

scholarly journals Study on the Influence of Metallic Powder in Near-Dry Electric Discharge Machining

2020 ◽  
Vol 66 (4) ◽  
pp. 243-253 ◽  
Author(s):  
Sanjay Sundriyal ◽  
Vipin ◽  
Ravinderjit Singh Walia
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Dielectric Medium ◽  
Metallic Powder ◽  
Machining Process ◽  
Electric Discharge Machining ◽  
En 31 ◽  
Edm Process ◽  
Dry Electrical Discharge Machining

Near-dry electrical discharge machining (ND-EDM) is an eco-friendly process. In this study, an approach has been made to make the machining process more efficient than ND-EDM with the addition of metallic powder with the dielectric medium to machine EN-31 die steel. Powdermixed near-dry EDM (PMND-EDM) has several advantages over the ND-EDM or conventional electrical discharge machining (EDM) process, such as a higher material removal rate (MRR), fine surface finish (Ra), sharp cutting edge, lesser recast layer, and lower deposition of debris. The output response variables are MRR, Ra, residual stress (RS) and micro-hardness (MH) of the machined surfaces. Further study of the workpiece was performed, and a comparative study was conducted between ND-EDM and PMND-EDM. In this proposed method of machining, the MRR, Ra, and MH increased by 17.85 %, 16.36 %, and 62.69 % while RS was reduced by 56.09 %.

scholarly journals Multi-Performance Optimization in Electrical Discharge Machining of Al2O3 Ceramics Using Taguchi Base AHP Weighted TOPSIS Method

Processes ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1647
Author(s):  
Yue-Peng Zeng ◽  
Chiang-Lung Lin ◽  
Hong-Mei Dai ◽  
Yan-Cherng Lin ◽  
Jung-Chou Hung
Keyword(s):  
Process Parameters ◽  
Performance Optimization ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Statistical Technique ◽  
Electrode Wear ◽  
Machining Parameters ◽  
Relative Closeness ◽  
Machining Parameter

The main application of electrical discharge machining in ceramic processing is limited to conductive ceramics. However, the most commonly used non-conductive potteries in modern industry, such as aluminum oxide (Al2O3), also reveal the limitations of choosing a suitable process. In this study, Taguchi based TOPSIS coupled with AHP weight method to optimize the machining parameters of EDM on Al2O3 leads to better multi-performance. The results showed that the technique is suitable for tackling multi-performance machining parameter optimization. The adhesive foil had a significant impact on material removal rate, electrode wear rate, and surface roughness, according to the findings. In addition, the response graph of relative closeness is used to determine the optimal combination levels of machining parameters. A confirmation test revealed a good agreement between predicted and experimental preference values at an optimum combination of the input parameters. The suggested experimental and statistical technique is a simple, practical, and reliable methodology for optimizing EDM process parameters on Al2O3 ceramics. This approach might be utilized to optimize and improve additional process parameters in the future.

Effect of Wire Electrode Materials on Performance Characteristics for Wire Electrical Discharge Machining of Metal Matrix Composite Material

2020 ◽  
Author(s):  
Gurupavan Hurugalavadi Ramu ◽  
Holalu Venkatadas Ravindra ◽  
Devegowda Tadagavadi Muddegowda
Keyword(s):  
Silicon Carbide ◽  
Composite Materials ◽  
Surface Finish ◽  
Metal Matrix ◽  
Electrical Discharge ◽  
Electrode Materials ◽  
Electrical Discharge Machining ◽  
Electrode Wear ◽  
Wire Electrical Discharge Machining ◽  
Brass Wire

Abstract Composite materials are the advanced materials which are widely used in manufacturing industries. The most commonly used composite materials are metal matrix composites. Due to the presence of abrasive reinforcing particles, traditional machining of these causes severe tool wear and hence reduces the life of cutting tool. Wire electrical discharge machining (WEDM) is quite successful for machining of metal matrix composites. Wire Electrical Discharge machining is a specialized thermal machining process capable of accurately machining parts of hard materials with complex shapes. One of the main research fields in WEDM is related to the improvement of the process productivity by avoiding wire breakage. Wire electrodes used in WEDM are the core of the system. In this study the effect of different wire electrode materials on electrode wear and surface finish for wire electrical discharge machining of metal matrix composite material were investigated. The experiments were conducted under the following process parameters viz., pulse-on time, pulse-off time, wire feed speed and current. For the experiment the aluminium 6061 alloy with 0%, 5%, and 10% of silicon carbide (SiC) reinforcement material was used. To conduct the experiment CNC wire EDM machine with two different wires viz., molybdenum and brass wire was used. Experimental results indicate that for better surface finish of Al6061 alloy, the brass wire is more suitable. The use of brass wire as electrode material leads to significant reduction in electrode wear in machining of Al-5%SiC and Al-10%SiC composite materials compare to molybdenum wire. Increasing percentage of silicon carbide in aluminium 6061 alloy increases the variation in surface finish and electrode wear. Wire wear rate of both brass and molybdenum wire is increased with increase in percentage of silicon carbide.

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