Journal ArticleDOI
Accretion of titanium carbide by electrical discharge machining with powder suspended in working fluid
TLDR
In this article, a surface modification method by electrical discharge machining with a green compact electrode has been studied to make a thick TiC or WC layer, where the powder is suspended in working oil like kerosene and the use of a thin electrode and a rotating disk electrode are expected to keep powder concentration high in the gap between a workpiece and an electrode and to accrete powder material on the workpiece.Abstract:
A surface modification method by electrical discharge machining (EDM) with a green compact electrode has been studied to make thick TiC or WC layer. Titanium alloy powder or tungsten powder is supplied from the green compact electrode and adheres on a workpiece by the heat caused by discharge. To avoid the production process of the green compact electrode, a surface modification method by EDM with powder suspended in working fluid is proposed in this paper. After considering flow of working fluid in EDM process, the use of a thin electrode and a rotating disk electrode are expected to keep powder concentration high in the gap between a workpiece and an electrode and to accrete powder material on the workpiece. The accretion machining is tried under various electrical conditions. Titanium powder is suspended in working oil like kerosene. TiC layer grows a thickness of 150 μm with a hardness of 1600 Hv on carbon steel with an electrode of 1 mm in diameter. When a disk placed near a plate rotates in viscous fluid, the disk drags the fluid into the gap between the disk and the plate. Therefore, the powder concentration in the gap between a workpiece and a rotational disk electrode can be kept high. A wider area of the accretion can be obtained by using the rotational electrode with a gear shape.read more
Citations
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Journal ArticleDOI
A review on current research trends in electrical discharge machining (EDM)
TL;DR: In this paper, the authors reviewed the research trends in electrical discharge machining on ultrasonic vibration, dry EDM machining with powder additives, EDM in water and modeling technique in predicting EDM performances.
Journal ArticleDOI
Surface modification by electrical discharge machining: A review
TL;DR: In this paper, a review on the phenomenon of surface modification by electric discharge machining and future trends of its applications is presented, with particular emphasis on the potential of this process for surface modification.
Journal ArticleDOI
Parametric optimization of powder mixed electrical discharge machining by response surface methodology
TL;DR: In this paper, a study has been made to optimize the process parameters of powder mixed electrical discharge machining (PMEDM), and the results identify the most important parameters to maximize material removal rate and minimize surface roughness.
Journal ArticleDOI
Review of research work in sinking EDM and WEDM on metal matrix composite materials
TL;DR: A review of EDM process and year wise research work done in EDM on metal matrix composites is presented in this article, which also discusses the future trend of research work in the same area.
Journal ArticleDOI
Technology and research developments in powder mixed electric discharge machining (PMEDM)
TL;DR: Powder mixed electric discharge machining (PMEDM) is one of the recent innovations for the enhancement of capabilities of EDM process as mentioned in this paper, which reduces the insulating strength of the dielectric fluid and increases the spark gap between the tool and workpiece.
References
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Journal ArticleDOI
Three-dimensional microfabrication by localized electrochemical deposition
John D. W. Madden,Ian W. Hunter +1 more
TL;DR: In this article, a microfabrication technology capable of electrodepositing truly three-dimensional metal structures is introduced, which can potentially produce submicrometer feature sizes using a range of materials including pure metals, alloys, and polymers.
Journal ArticleDOI
Metal Surface Modification by Electrical Discharge Machining with Composite Electrode
TL;DR: In this paper, a new method of surface modification by electrical discharge machining using composite structured electrode surface modifications on work pieces of carbon steel or aluminum were carried out in hydrocarbon oil using composite electrodes Composite electrode consists of green compact products or sintered products Copper, aluminum, tungsten carbide and titanium were used for the material of the electrode, it was revealed that there existed the electrode material in the work surface layer and the characteristics of the surface of raw material remarkably changed
Surface Generation Mechanism in Electrical Discharge Machining with Silicon Powder Mixed Fluid(共著)
TL;DR: In this paper, the effect of silicon powder mixing on the surface generation mechanism is investigated, analyzing the shape of crater generated by a single pulse discharge, the surface roughness, the machined surface and so on.
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