Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Electrical Discharge Machining


Effect of Powder-Mixed Dielectric on EDM Process Performance

Safa R. Fadhil; Shukry H. Aghdeab

Engineering and Technology Journal, 2020, Volume 38, Issue 8, Pages 1226-1235
DOI: 10.30684/etj.v38i8A.554

Electrical Discharge Machining (EDM) is extensively used to manufacture different conductive materials, including difficult to machine materials with intricate profiles. Powder Mixed Electro-Discharge Machining (PMEDM) is a modern innovation in promoting the capabilities of conventional EDM. In this process, suitable materials in fine powder form are mixed in the dielectric fluid. An equal percentage of graphite and silicon carbide powders have been mixed together with the transformer oil and used as the dielectric media in this work. The aim of this study is to investigate the effect of some process parameters such as peak current, pulse-on time, and powder concentration of machining High-speed steel (HSS)/(M2) on the material removal rate (MRR), tool wear rate (TWR) and the surface roughness (Ra). Experiments have been designed and analyzed using Response Surface Methodology (RSM) approach by adopting a face-centered central composite design (FCCD). It is found that added graphite-silicon carbide mixing powder to the dielectric fluid enhanced the MRR and Ra as well as reduced the TWR at various conditions. Maximum MRR was (0.492 g/min) obtained at a peak current of (24 A), pulse on (100 μs), and powder concentration (10 g/l), minimum TWR was (0.00126 g/min) at (10 A, 100 μs, and 10 g/l), and better Ra was (3.51 μm) at (10 A, 50 μs, and 10 g/l).

Improve the Surface Characteristics of the Electric Discharge Machining Employing a Method Burnishing Process

Shukry H. Aghdeab; Ahmed G. Abdulameer; Ahmed B. Abdulwahhab; Majid H. Ismiel

Engineering and Technology Journal, 2020, Volume 38, Issue 4A, Pages 545-551
DOI: 10.30684/etj.v38i4A.308

Electrical Discharge Machining (EDM) applies the concept of material eradication by utilizing electric spark erosion. The target of this exploration concentrates to examine the ideal procedure parameters of EDM on Aluminum 6061-T6as a workpiece with copper as a tool electrode. The effect of various process operators 'on machining rendering was examined. Internal factors with current (10, 20, 30) Ampere, pulse on time (50, 100, 150) μs was used after which takes pulse off time (25, 50, 75) μs. All parameters applied for empirical acts with influence on Ra (surface roughness ). The result showed that MRR" Material Removal Rate” is increment by expanding in current and pulse on time and it declines by expanding in pulse off time. Optimal condition are gained when using " Using current 30 Ampere, pulse on time is 150 μs and minimize assessment of pulse off time is 25 μs.

Investigation of the Effect of Nano Powder Mixed Dielectric on EDM Process

Rasha R. Elias

Engineering and Technology Journal, 2020, Volume 38, Issue 3A, Pages 295-307
DOI: 10.30684/etj.v38i3A.337

In this paper, Artificial Neural Network was adopted to predict the effect of current, the concentration of aluminum oxide (Al2O3) and graphite Nanopowders in dielectric fluid for the machining of Carbon steel 304 using Electrical Discharge Machining (EDM). The process variables were utilized to find their effect on Material Removal Rate (MRR), Surface Roughness (SR), and Tool Wear Rate (TWR). It was revealed from the experimental work that the addition of aluminum oxide and graphite Nanopowders into dielectric fluid maximizing MRR, minimized the SR and TWR at various variables. Minitab software was used in the design of experiments. Analysis of the process outputs of EDM indicates that graphite powder concentration greatly influencing SR also the discharge current whereas the current and Nanopowders concentration has more percentage of influence on the TWR and MRR.

Analysis of the Influence of Different EDM Parameters Using Taguchi Technique

S.H. Aghdeab; I.A. Qasim

Engineering and Technology Journal, 2017, Volume 35, Issue 6, Pages 571-577

Electrical discharge machining (EDM) is a non-traditional material removal process developed in late 1940s has now become the most important technology in manufacturing industries. Taguchi technique has been applied for design of experiments with three input factors and their trinity levels utilizing L9 orthogonal array. The nine specimens were machined with different electrodes material where AISI 304 stainless steel had been used as a workpiece with kerosene as dielectric fluid. The major aim of this study is the evaluation to choice the principle specifications of electrical discharge machining with the assist of Taguchi technique and utilizing Minitab program in condition of material removal rate and electrode wear rate. The variance conditions examined during production the research on electrical discharge machining would be the electrodes material, current and workpiece thickness. The effect of each parameters and excellent performance variables will be achieve by means of ANOVA examination and conformed by investigation to enhance method.

Study the Effect of Electrode Wear Weight (EWW) in Electrical Discharge Machining (EDM)

Shukry H. Aghdeab; Wathik I. Mahdi AL-Tameemi; Afiaa F.Jawad

Engineering and Technology Journal, 2014, Volume 32, Issue 6, Pages 1433-1441

Electrical Discharge Machining (EDM) is one of the earliest non-conventional manufacturing processes based on thermo-electric energy which removing material from a part by electrical discharges between the tools called electrode and the part being machined in the dielectric fluid called work piece. One of the most important performance measures in electrical discharge machining (EDM) process are the electrode wear weight(EWW).
In the present work an experiments has been done to evaluate the rapidity of wear weight electrode of different material (Copper, Brass and Steel) under the same machining condition to analyze the effect of electrode material and the current on electrode wear weight.