Simulation of Particles Movement in Powder Mixed EDM

Wang, Dong Guo

doi:10.4028/www.scientific.net/amr.97-101.4150

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…Radial pattern and a trace of the circular annulus at the edge of the machined surface were found by Wang and colleagues, 99,100 at 4 g/L concentration of Si powder in the dielectric while machining NAK-80 mold steel. All the negatively charged electrons collide with the positive charges present on the workpiece surface generating enormous amount of heat energy.…”

Section: Influence Of Powder Properties On Machining Characteristicsmentioning

confidence: 68%

State of the art in powder-mixed electric discharge machining: A review

Talla

Gangopadhayay

Biswas

2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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Accomplishment of high machining rates along with good surface quality is a major concern in electric discharge machining process. Powder-mixed electric discharge machining in which suitable powder particles are impregnated in dielectric has gone forth as a potential solution to this problem. Nevertheless, challenges such as dielectric circulation, homogeneous blending of the powder particles in the dielectric, debris removal and quantity of the powder material required have to be addressed carefully before implementing this process on a large scale in the manufacturing industry. Extensive research in the field of electric discharge machining using powder-suspended dielectrics has started only in the recent years. In this article, a comprehensive review of the research going on in the field of powder-mixed electric discharge machining is presented. The emphasis is given on powder-mixed electric discharge machining mechanism, influence of powder characteristics and machining parameters on various responses. Some of the major application areas, variants of the basic powder-mixed electric discharge machining process and possibilities of further improvement are also discussed.

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Section: Influence Of Powder Properties On Machining Characteristicsmentioning

confidence: 68%

State of the art in powder-mixed electric discharge machining: A review

Talla

Gangopadhayay

Biswas

2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…[52], or even three-phase flow including gas bubbles. Various authors analyzed the flushing conditions during ED processes using Reynolds-averaged Navier-Stokes (RANS) approaches within commercial software, such as CFX [7,38,48,53,54] or Fluent [37,40,[55][56][57][58][59][60][61], both by ANSYS, INC., Canonsburg, PA, USA, but also COMSOL Multiphysics by COMSOL, INC., Burlington, VT, USA [35,[62][63][64][65], or STAR-CCM+ by SIEMENS INDUSTRY SOFTWARE INC., Plano, TX, USA [66]. The degrees of complexity of the RANS modeling approaches are equally crucial but quite different in the existing works.…”

Section: State Of the Artmentioning

confidence: 99%

Helical Electrodes for Electro-Discharge Drilling: Experimental and CFD-Based Analysis of the Influence of Internal and External Flushing Geometries on the Process Characteristics

Uhlmann,

Polte,

Yabroudi

et al. 2023

JMMP

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The electro-discharge (ED) drilling of precision boreholes in difficult-to-machine materials, particularly with respect to the cost-effectiveness of the overall process, is still a challenge. Flushing is one key factor for the precise machining of boreholes, especially with high aspect ratios. Therefore, the influence of internal and external flushing geometries for six types of brass tool electrodes with a diameter of 3 mm with and without a helical groove was analyzed experimentally and numerically. Using this helical external flushing channel, drilling experiments in X170CrVMo18-3-1 (Elmax Superclean) with an aspect ratio of five revealed a material removal rate (MRR) that was increased by 112% compared with a rod electrode, increased by 28% for a single-channel tool electrode and decreased by 8% for a multi-channel tool electrode. Signal analyses complemented these findings and highlighted correlations between classified discharge event types and the experimental target parameters. Amongst others, it was verified that the arcing frequency ratio drove the electrode wear rate and the beneficial frequency ratio correlated with the MRR and the surface roughness Ra. Sophisticated 3D computational fluid dynamics (CFD) models of the liquid phase were introduced and evaluated in great detail to demonstrate the validity and further elucidate the effect of the external flushing channel on the evacuation capability of debris and gas bubbles. The presented methods and models were found to be suitable for obtaining in-depth knowledge about the flushing conditions in the ED drilling working gap.

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“…Load plate coil is a important part of electrical energy converting magnetic field, to make the workpiece deformation. Its structure design directly influences on the quality of forming, forming efficiency, the coil lifetime [10,11]. When the device capacitance finalized, the frequency mainly is controlled by the inductance (L).…”

Section: Structure Design Of Impacting Devicementioning

confidence: 99%

System Design for High Energy Rate Electromagnetic Powder Compaction Devices

Liu

Zhou

Dong

et al. 2010

AMR

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In this paper, the main element is constructed high energy electromagnetic compaction system on the high-energy flat coil. Physical model for analyzing dynamic response of high pulse current was reviewed. Design loading device using high energy electromagnetic technology to suppress powder, consider the exhaust, stripping, loading, positioning and other issues,propose a more reasonable program.The device includes various components of the installation. such as coil, the coil plate, driver, amplifiers, punching first, die, upper and lower fixing plate. The model of device based on Pro/E to facilitate manufacturing.Pressure embryo along the suppression direction has more uniform density distribution.The technology possesses advantagesof the single side forming and directional loading.

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Simulation of Particles Movement in Powder Mixed EDM

Cited by 5 publications

References 14 publications

State of the art in powder-mixed electric discharge machining: A review

State of the art in powder-mixed electric discharge machining: A review

Helical Electrodes for Electro-Discharge Drilling: Experimental and CFD-Based Analysis of the Influence of Internal and External Flushing Geometries on the Process Characteristics

System Design for High Energy Rate Electromagnetic Powder Compaction Devices

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