Optimization of EDM process for multiple performance characteristics using Taguchi method and Grey relational analysis

Jung, Jong Hyuk; Kwon, Won‐Tae

doi:10.1007/s12206-010-0305-8

Cited by 165 publications

(55 citation statements)

References 14 publications

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“…The residual stresses and white layer have a great relationship with the type of the EDM dielectric [31,32]. Machining performance in the EDM process can be improved effectively through optimal machining parameters [33][34][35][36][37][38][39]. Using kerosene as dielectric will discharge large amounts of solid, liquid and gaseous wastes, which result in serious environmental problems.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on green electrical discharge machining in tap water of Ti–6Al–4V and parameters optimization

Tang

2013

Int J Adv Manuf Technol

102

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Ti-6Al-4V is widely used in the aerospace, automobile, and biomedical fields, but is a difficult-to-machine material. Electrical discharge machining (EDM) is regarded as one of the most effective approaches to machining Ti-6Al-4V alloy, since it is a non-contact electro-thermal machining method, and it is independent from the mechanical properties of the processed material. This paper aims to combine grey relational analysis and Taguchi methods to solve the problem of EDM parameters optimization. From the viewpoint of health and environment, tap water as working fluid has good working environment, since it does not release harmful gas. The process parameters include discharge current, gap voltage, lifting height, negative polarity and pulse duty factor. The electrode wear ratio (EWR), material removal rate (MRR) and surface roughness (SR) as objective parameters are chosen to evaluate the whole machining effects. Experiments were carried out based on Taguchi L 9 orthogonal array and grey relational analysis, and then verified the results through a confirmation experiment. Compared the machining parameters A 1 B 1 C 3 D 2 with A 1 B 2 C 2 D 2 , MRR increased from 1.28 mm 3 /min to 2.38 mm 3 /min, EWR decreased from 0.14 to 0.10 mm 3 /min and SR decreased from Ra 2.37 μm to Ra 1.93 μm. The process parameters sequenced in order of relative importance are: the ratio of pulse width to pulse interval, discharge current, lifting height and gap voltage. The results showed that using tap water machining Ti-6Al-4V material can obtain high MRR, decrease the machining cost and have no harmful to the operators and the environment.

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Section: Introductionmentioning

confidence: 99%

Experimental study on green electrical discharge machining in tap water of Ti–6Al–4V and parameters optimization

Tang

2013

Int J Adv Manuf Technol

102

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“…To this aspect, Kanagarajan, Karthikeyan [121] used the grey relational approach (GRA) and Taguchi, a combination of multioptimization to study the tool wear exit and entry clearance, machining duration and number of short-circuits generated. Jung and Kwon [122] also used the same GRA technique on EDM of Al 10% SiCp composite for multi-optimization for multiple responses. The experimental data proves that there is visible improvement in the EDM characteristics.…”

Section: Optimization Techniques Used In Edmmentioning

confidence: 99%

A review on machining of metal matrix composites using nanoparticle mixed dielectric in electro-discharge machining

Mohanty¹,

Routara²

2016

Int. J. Automot. Mech. Eng.

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The growth in the new advanced materials that are harder till date have led to the improvement of technologies used to machine them. Nowadays, new materials have been developed to be used in different sectors where lighter and harder materials are in vast requirement. Moreover, materials machined with high precision machine tools have to provide the greatest surface finish such that it catches the pace with other competitive materials. Research has shown that the electro-discharge machining (EDM) is the only machine tool that has created history in machining hard materials. In the recent years, metal matrix composites (MMCs) have an increasing demand in the industries since they are hard materials to machine and a good finish is required in the aerospace, marine, aircraft, nuclear and other similar industries. Thus, EDM has gained fame in machining MMCs. With due course, the powder mixed electro-discharge machining (PMEDM) has created efficient EDM, with the use of powders in the dielectric. The dielectric mixed EDM has been used for efficient material removal rate (MRR). With the change in technologies, the sizes of powders that have to be added in the dielectric fluid go on decreasing. In this review, studies by numerous researchers on the MMCs that are machined with the use of PMEDM are mentioned. The powders used in the experimentation are of nano size. Furthermore, the optimization technique used by the researchers is discussed in the present study.

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“…Lin은 공작물제거율, 표면조도, 공구 마모율의 3가지 특성을 최적화 하였고 (11) , Singh는 공작 물제거율, 공구마모율, 표면조도, 테이퍼 정도, 반경방향 오버 컷 등을 최적화하였다 (12) . 또한 마이크로 EDM 가공 중, 최소반 경과 최고 세장비를 위한 최적화도 수행되었다 (13,14) . 이 연구에서는 마이크로 EDM 가공 중, 정밀도는 그대로 유 지하면서 생산성을 최대로 높이는 방법이 제안되었다.…”

Section: 서 론unclassified

Process Optimization for Productivity Improvement during EDM machining of a micro-hole

Kwon

Kim²

2012

Journal of manufacturing engineering & technology

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Micro electrical discharge machining (μEDM) has been used for non-conventional material removal. One drawback of μEDM is low productivity. In this study, we tried to find the optimal machining conditions to manufacture the micro hole with an optimal machining time without loss of accuracy. Taguchi method was used to figure out the relation between machining parameters and characteristics of the process. It was found that the electrode wear, the entrance and exit clearance gave a significant effect on the diameter of the micro hole when the diameter of the electrode was identical. Grey relational analysis was used to determine the optimal machining condition for minimum machining time without loss of accuracy.The obtained optimal machining condition was the input voltage of 80V, the capacitance of 680pF, the resistance of 500Ω, the feed rate of 1.5μm/s and the spindle speed of 2900rpm. The machining time was reduced to 48% without loss of accuracy under the optimal machining condition.

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Optimization of EDM process for multiple performance characteristics using Taguchi method and Grey relational analysis

Cited by 165 publications

References 14 publications

Experimental study on green electrical discharge machining in tap water of Ti–6Al–4V and parameters optimization

Experimental study on green electrical discharge machining in tap water of Ti–6Al–4V and parameters optimization

A review on machining of metal matrix composites using nanoparticle mixed dielectric in electro-discharge machining

Process Optimization for Productivity Improvement during EDM machining of a micro-hole

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