A study on the quality micro-hole machining of tungsten carbide by micro-EDM process using transistor and RC-type pulse generator

Jahan, Muhammad P.; Wong, Yoke San; Rahman, M.

doi:10.1016/j.jmatprotec.2008.04.029

Cited by 210 publications

(78 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…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%

“…When analysing the proposed electrodes with other materials, similar tendencies can be observed [5,6]. For the comparison study, the data from the literature were examined [5].…”

Section: Comparison Study Of Mrr With Other Electrode Materialsmentioning

confidence: 63%

“…However, when considering RC generator the analysed resultant parameters do not follow fully the trends as in Section 5.1 in which C exponent was very low. With low frequency and not fully charged capacitor, what may happen with RC-circuit, it will not discharge the maximum energy, rather there will be variation in the discharge energy [6]. Thus, it may disturb the result compared with what is theoretically expected and lower or even eliminate the exponent for some parameters as it was the case in Section 5.1.…”

Section: Mrr Analysismentioning

confidence: 91%

See 2 more Smart Citations

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

View full text Add to dashboard Cite

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.

show abstract

Section: Conclusion and Summarysupporting

confidence: 90%

“…When analysing the proposed electrodes with other materials, similar tendencies can be observed [5,6]. For the comparison study, the data from the literature were examined [5].…”

Section: Comparison Study Of Mrr With Other Electrode Materialsmentioning

confidence: 63%

Section: Mrr Analysismentioning

confidence: 91%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

show abstract

“…Karunamoorthy and Ramakrishnan (2004) proposed a mathematical model using RSM. Jahan et al(2009) studied using transistor and RC typed generators in order to find the effect of EDM machining. It was found that surface finish was achieved better in RC type pulse generator rather than transistor type pulse generator.…”

Section: Literature Reviewmentioning

confidence: 99%

Comparison of optimization techniques for MRR and surface roughness in wire EDM process for gear cutting

Mohapatraa¹,

Satpathy²,

Sahooa³

2017

10.5267/j.ijiec

View full text Add to dashboard Cite

The objective of the present work is to use a suitable method that can optimize the process parameters like pulse on time (TON), pulse off time (TOFF), wire feed rate (WF), wire tension (WT) and servo voltage (SV) to attain the maximum value of MRR and minimum value of surface roughness during the production of a fine pitch spur gear made of copper. The spur gear has a pressure angle of 20⁰ and pitch circle diameter of 70 mm. The wire has a diameter of 0.25 mm and is made of brass. Experiments were conducted according to Taguchi's orthogonal array concept with five factors and two levels. Thus, Taguchi quality loss design technique is used to optimize the output responses carried out from the experiments. Another optimization technique i.e. desirability with grey Taguchi technique has been used to optimize the process parameters. Both the optimized results are compared to find out the best combination of MRR and surface roughness. A confirmation test was carried out to identify the significant improvement in the machining performance in case of Taguchi quality loss. Finally, it was concluded that desirability with grey Taguchi technique produced a better result than the Taguchi quality loss technique in case of MRR and Taguchi quality loss gives a better result in case of surface roughness. The quality of the wire after the cutting operation has been presented in the scanning electron microscopy (SEM) figure.

show abstract

“…Therefore, machining of Ni-Ti SMA requires non-conventional machining processes such as EDM and laser machining [10]. Jahan et al investigated the influence of main parameters on the performance of micro-EDM with WC electrodes while producing quality micro-holes in both transistor-and RC-type generators [11]. Son et al investigated the influence of EDM parameters especially pulse duration, on micro-EDM characteristics such as material removal rate and machining accuracy [12].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Process Parameters in Micro -EDM Machining

Babu.T¹,

.Ravishankar²,

Koorapati³

2014

IJIRSET

View full text Add to dashboard Cite

ABSTRACT:Micro-EDM is a newly developed method to produce micro parts which in the range of 50-100µm.It is an efficient machining processes for the fabrication of a micro -metal hole with various advantages resulting from its characteristics of non-contact and thermal processes. In this paper the Taguchi design approach has been employed to investigate the micro -EDM parameters in order to achieve the highest Material Removal Rate (MRR), good surface quality and low Tool Wear Rate(TWR) while machining Ni-Ti based Shape Memory Alloy (SMA),it has been observed that MRR is highly influenced by capacitance , discharge voltage and depends up on the electrode material .Tungsten electrode is recommended for better surface roughness and brass electrode for better MRR.

show abstract

A study on the quality micro-hole machining of tungsten carbide by micro-EDM process using transistor and RC-type pulse generator

Cited by 210 publications

References 12 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

Comparison of optimization techniques for MRR and surface roughness in wire EDM process for gear cutting

Investigation of Process Parameters in Micro -EDM Machining

Contact Info

Product

Resources

About