Experimental investigation of wire electrical discharge machining of gallium-doped germanium

Bamberg, Eberhard; Rakwal, Dinesh

doi:10.1016/j.jmatprotec.2007.06.038

Cited by 35 publications

(12 citation statements)

References 11 publications

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“…This is because WEDM provides an effective solution for machining hard materials (like titanium, molybdenum, zirconium, tungsten carbide, etc.) with intricate shapes and profiles that are difficult to machine using conventional methods [1][2][3][4]. Cutting velocity and surface roughness are important output parameters.…”

Section: Introductionmentioning

confidence: 99%

Optimization of wire electrical discharge machining process parameters for cutting tungsten

Yang

Tzeng

Yang

et al. 2011

Int J Adv Manuf Technol

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This study analyzes variations in metal removal rate (MRR) and quality performance of roughness average (R a ) and corner deviation (CD) depending on parameters of wire electrical discharge machining (WEDM) process in relation to the cutting of pure tungsten profiles. A hybrid method including response surface methodology (RSM) and back-propagation neural network (BPNN) integrated simulated annealing algorithm (SAA) were proposed to determine an optimal parameter setting. The results of 18 experimental runs via a Taguchi orthogonal table were utilized to train the BPNN to predict the MRR, R a , and CD properties. Simultaneously, RSM and SAA approaches were individually applied to search for an optimal setting. In addition, analysis of variance was implemented to identify significant factors for the processing parameters. Furthermore, the field-emission scanning electron microscope images show that a lot of built-edge layers were presented on the finishing surface after the WEDM process. Finally, the optimized result of BPNN with integrated SAA was compared with that obtained by an RSM approach. Comparisons of the results of the algorithms and confirmation experiments show that both RSM and BPNN/SAA methods are effective tools for the optimization of parameters in WEDM process.

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Section: Introductionmentioning

confidence: 99%

Optimization of wire electrical discharge machining process parameters for cutting tungsten

Yang

Tzeng

Yang

et al. 2011

Int J Adv Manuf Technol

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“…4b. Based on this result as well as earlier work by Bamberg and Rakwal (2008) as well as Rakwal and Bamberg (2007), which established that the surface quality is largely affected by the size of the capacitance and to a lesser degree by the voltage, a capacitance of 47 pF and a spark voltage of 60 V were chosen as the EDM parameters for this study.…”

Section: Characteristics Of Drilling Micro-holes With Non-orbiting Elmentioning

confidence: 81%

Orbital electrode actuation to improve efficiency of drilling micro-holes by micro-EDM

Bamberg

Heamawatanachai

2009

Journal of Materials Processing Technology

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“…3 have a uniform cross section of 255 9 255 lm and the cut was achieved in three steps. First, a rough cut was performed with a voltage of 150 V and a capacitance of 9.9 nF, which in germanium has been shown to not produce cracks in the bulk material (Bamberg and Rakwal 2008). This profiling cut traced the outlines of the electrodes but left roughly 10 lm of material on all surfaces.…”

Section: L-wedm Machining Resultsmentioning

confidence: 99%

Fabrication of compliant high aspect ratio silicon microelectrode arrays using micro-wire electrical discharge machining

et al. 2009

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This paper reports on the fabrication of high aspect ratio silicon microelectrode arrays by micro-wire electrical discharge machining (l-WEDM). Arrays with 144 electrodes on a 400 lm pitch were machined on 6 and 10 mm thick p-type silicon wafers to a length of 5 and 9 mm, respectively. Machining parameters such as voltage and capacitance were varied for different wire types to maximize the machining rate and to obtain uniform electrodes. Finite element analysis was performed to investigate electrode shapes with reduced lateral rigidity. These compliant geometries were machined using l-WEDM followed by a two step chemical etching process to remove the recast layer and to reduce the cross sections of the electrodes.

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Experimental investigation of wire electrical discharge machining of gallium-doped germanium

Cited by 35 publications

References 11 publications

Optimization of wire electrical discharge machining process parameters for cutting tungsten

Optimization of wire electrical discharge machining process parameters for cutting tungsten

Orbital electrode actuation to improve efficiency of drilling micro-holes by micro-EDM

Fabrication of compliant high aspect ratio silicon microelectrode arrays using micro-wire electrical discharge machining

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