Studies on electric-discharge machining of non-contact seal face grooves

Chen, S.L.; Hsu, Quang‐Cherng

doi:10.1016/s0924-0136(03)00761-1

Cited by 10 publications

(4 citation statements)

References 8 publications

(7 reference statements)

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“…Moreover, Yu et al (2004) investigated the dry EDM of WC using CuW pipe electrode. In addition, studies on the EDM of non-contact seal face grooves on WC using a CuW electrode has been conducted (Chen and Hsu, 2003). It was found that the wear can be considerably reduced by using CuW electrodes.…”

Section: Introductionmentioning

confidence: 99%

A study on the fine-finish die-sinking micro-EDM of tungsten carbide using different electrode materials

Jahan

Wong

Rahman

2009

Journal of Materials Processing Technology

190

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Section: Introductionmentioning

confidence: 99%

A study on the fine-finish die-sinking micro-EDM of tungsten carbide using different electrode materials

Jahan

Wong

Rahman

2009

Journal of Materials Processing Technology

190

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“…When some materials on the surface of the workpiece was removed by discharge spark, craters occur. If discharge current increases, the material remove ratio also increases, but it produces large craters and obtains large surface roughness [13].The peculiarity of an electrical discharge machined surface is determined by various factors associated with a complex erosion mechanism. Randomly overlapping craters of dimensions varying with pulse energy cover the machined surface, their sizes and positions reflecting the stochastic nature of the process [14].…”

Section: Surface Topographymentioning

confidence: 99%

Metallurgical alterations in the surface of steel cavities machined by EDM

et al. 2013

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The electrical discharge machining (EDM) is a process characterized by high thermal demands, which tend to cause metallurgical changes in the surface of the workpiece [1][2]. This work aims to conduct a discussion of metallurgical changes in the surface of cavities obtained by the process of EDM in the machining of steel. Several variables were employed, such as cavity depth, electrode geometry and technological parameters of the process. Thus, the goal was to identify the different metallurgical changes that can occur in the machined surfaces. The evaluation of these changes was made from metallographic analysis, measurements of microhardness and of the depth of the layer affected by process. The results of this work identified several metallurgical changes such as formation of white layer, hardness variation and change of microstructure. The occurrence of microcracks also was observed, especially in severe conditions. The greatest variations in results were caused by the change of technological parameters. However, the variation in cavity depth and the change of the electrode geometry also showed influence on the results.

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“…Thin foils of conventional low melting point electrodes like copper, brass, AISI 304, as well as high melting point materials such as W and WCu, were used during R-MEDM. WCu produces high erosion rate, whereas WAg produced defect-free nanofinished surface with the lowest R a and R max values [ 23 , 47 , 48 ]. Details of the electrode shape, size, and the corresponding arrayed features machined are presented in Table 3.…”

Section: Fabrication Of High Aspect Ratio Arrayed Features Using R-medmmentioning

confidence: 99%

Recent developments in the reverse micro-electrical discharge machining in the fabrication of arrayed micro-features

Mastud

Garg

Singh

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part C:

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High aspect ratio arrayed micro-structures and textured surfaces are required in diversified applications such as electrical contacts, printing heads, electrodes for micro-batteries, injection nozzles, nano-material delivery systems, biomedical implants, and hydrophobic surfaces. Reverse micro-electrical discharge machining (R-MEDM) process has a capability to fabricate such arrayed features on a variety of workpiece materials irrespective of their mechanical properties. R-MEDM is a variant of micro-electrical discharge machining (MEDM) process, key difference being, extruded arrayed features are fabricated in the R-MEDM process against the micro-cavities that are machined in MEDM. This article highlights the recent advances in process characterization and modelling of mechanics of the R-MEDM process. The focus of discussion is on comparing the process with the other micromachining processes presently available for the fabrication of arrayed micro-features. In addition, R-MEDM process characteristics in the fabrication of arrayed features on ‘easy’ and ‘difficult’ to erode materials are presented. It is understood that R-MEDM has comparable or in some cases better performance in the fabrication of arrayed features than the processes like micro-milling, micro-wire EDM, micro-wire electrical discharge grinding (EDG) and block EDG.

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Studies on electric-discharge machining of non-contact seal face grooves

Cited by 10 publications

References 8 publications

A study on the fine-finish die-sinking micro-EDM of tungsten carbide using different electrode materials

A study on the fine-finish die-sinking micro-EDM of tungsten carbide using different electrode materials

Metallurgical alterations in the surface of steel cavities machined by EDM

Recent developments in the reverse micro-electrical discharge machining in the fabrication of arrayed micro-features

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