Experimental investigations on the microhole machining of 304 stainless steel by micro-EDM process using RC-type pulse generator

Natarajan, N.; Suresh, P.

doi:10.1007/s00170-014-6494-z

Cited by 49 publications

(20 citation statements)

References 22 publications

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“…Thus, for maximising these geometrical parameters of manufactured holes, the resistance should be at very low level. The results of the test with RC generator are with accordance with the results shown previously in the literature for other electrodes like brass [13] or tungsten [6].…”

Section: Conclusion and Summarysupporting

confidence: 90%

Multifilament carbon fibre tool electrodes in micro EDM—evaluation of process performance based on influence of input parameters

Trych-Wildner

Wildner

2017

Int J Adv Manuf Technol

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The aim of the study was to verify the possibility of application of multifilament carbon fibre electrodes for electrical discharge machining process. In the article, the novel type of tool electrode in form of a rod that is composed of carbon fibres was proposed. The performed analysis taking into account the influence of input parameter from RC generator like voltage, capacitance and resistance along with evaluation of the process with this novel type of electrodes was considered. The manufacturing technique was assessed by analysing the geometry parameters of machined holes like diameters and maximum depth. The detailed analysis and quantitative values of the impact of each of the input factors were presented and response surfaces according to the experimental methodology were obtained. The key efficiency parameter which was expressed by material removal rate (MRR) was also calculated and compared with data for other materials used as tool electrodes that were presented previously in literature. The comparison study proved that with multifilament carbon fibre electrodes the comparable range of MRR parameter in similar electro-erosive conditions can be obtained. Thus, they can be considered as complementary material for tool electrode purposes.

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Section: Conclusion and Summarysupporting

confidence: 90%

Multifilament carbon fibre tool electrodes in micro EDM—evaluation of process performance based on influence of input parameters

Trych-Wildner

Wildner

2017

Int J Adv Manuf Technol

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“…Since the last decade, a lot of contributions have been made in the area of micro-hole drilling using µ-EDM process. Natarajan and Suresh [15] have drilled a micro-hole Technical Editor: Adriano Fagali de Souza. on stainless steel grade 304 using µ-EDM and investigated the behavior of response measures over input conditions such as accuracy, tool wear rate and material removal rate.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on drilling micro-hole through micro-EDM and optimization of multiple performance characteristics

Singh

Patowari

Chandrasekaran

2020

J Braz. Soc. Mech. Sci. Eng.

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Drilling of micro-hole with fine edges and smooth internal surfaces finds numerous applications in manufacturing industries; holes drilled in injection nozzles, drug delivery orifices and spinneret holes are some of examples. This work carries out an experimental investigation and parametric optimization on micro-hole drilling using micro-electrical discharge machining (µ-EDM) process. The machining experiments are conducted employing Taguchi L16 orthogonal array for evaluating machining time (t) average overcut (AOV), taper angle (TA), entry overcut (EnOV), exit overcut (ExOV) and material removal rate (MRR) as process performances, while voltage (V), capacitance (pF) and feed rate (µm/s) are considered as process parameters. The influence of process parameters on the responses is studied at different cutting conditions. The drilled microholes profile is studied in terms of burrs, craters, spots on the edges and internal surfaces using micrographs obtained with optical and scanning electron microscopes. The ANOVA result reveals that capacitance is the most significant parameter for t, AOV, TA, MRR, EnOV and ExOV. For simultaneous optimization of three performance measures (i.e., t, AOV and TA), an overall evaluation criterion has been evaluated and optimum cutting conditions such as voltage: 80 V, capacitance: 100 pF and feed rate: 15 µm/s are obtained. The expected outcome obtained at the optimum condition is improved by 10.57% (36.934 to 40.839) over the grand average of performance. The confirmation experimental result at optimum cutting condition (i.e., 39.378) is comparable with the expected result (i.e., 40.839).

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“…The conventional micro-EDM system is usually operated by numerical control (NC) or computer numerical control (CNC) controllers [20]. In addition, the position alignment and the scanning process with tool compensation are also possible.…”

Section: Control Pad Micro-controller Chips (Dspic)mentioning

confidence: 99%

Desktop Micro-EDM System for High-Aspect Ratio Micro-Hole Drilling in Tungsten Cemented Carbide by Cut-Side Micro-Tool

Huang

Sheu

2020

Micromachines

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Tungsten cemented carbide (WC-Co) is a widely applied material in micro-hole drilling, such as in suction nozzles, injection nozzles, and wire drawing dies, owing to its high wear resistance and hardness. Since the development of wire-electro-discharge grinding (WEDG) technology, the micro-electrical discharge machining (micro-EDM) has been excellent in the process of fabricating micro-holes in WC-Co material. Even though high-quality micro-holes can be drilled by micro-EDM, it is still limited in large-scale production, due to the electrode tool wear caused during the process. In addition, the high cost of precision micro-EDM is also a limitation for WC-Co micro-hole drilling. This study aimed to develop a low-cost desktop micro-EDM system for fabricating micro-holes in tungsten cemented carbide materials. Taking advantage of commercial micro tools in a desktop micro-EDM system, it is possible to reach half the amount of large-scale production of micro-holes. Meanwhile, it is difficult to drill the deep and high aspect ratio micro-holes using conventional micro-EDM, therefore, a cut-side micro-tool shaped for micro-EDM system drilling was exploited in this study. The results show that micro-holes with a diameter of 0.07 mm and thickness of 1.0 mm could be drilled completely by cut-side micro-tools. The roundness of the holes were approximately 0.001 mm and the aspect ratio was close to 15.

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Experimental investigations on the microhole machining of 304 stainless steel by micro-EDM process using RC-type pulse generator

Cited by 49 publications

References 22 publications

Multifilament carbon fibre tool electrodes in micro EDM—evaluation of process performance based on influence of input parameters

Multifilament carbon fibre tool electrodes in micro EDM—evaluation of process performance based on influence of input parameters

Experimental study on drilling micro-hole through micro-EDM and optimization of multiple performance characteristics

Desktop Micro-EDM System for High-Aspect Ratio Micro-Hole Drilling in Tungsten Cemented Carbide by Cut-Side Micro-Tool

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