Parametric optimization of powder mixed electrical discharge machining by response surface methodology

Kansal, H. K.; Singh, Sehijpal; Kumar, Pawan

doi:10.1016/j.jmatprotec.2005.03.028

Cited by 365 publications

(173 citation statements)

References 19 publications

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“…Pulse-on time has a trivial effect on MRR as compared to gap voltage. Similar results were found in the previous studies [15,16]. Gap voltage is essentially correlated to spark gap and dielectric strength.…”

Section: Effect On Materials Removal Ratesupporting

confidence: 91%

Electro-discharge machining of alumina: Investigation of material removal rate and surface roughness

Ali¹,

Moudood²,

Maleque³

et al. 2017

J. MECH. ENG. SCI.

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Alumina is a non-conductive ceramic material which can meet the high demand of industrial applications due to its excellent physical and chemical properties. However, machining of alumina is not possible by using the conventional machining methods due to its inherent brittleness. Recently, electro-discharge machining has been used for structuring alumina with assisting electrode to initiate the spark between the conductive tool electrode and the non-conductive work piece material. However, the effects of process parameters on material removal rate and surface roughness have not been investigated to formulate mathematical models. This study dealt with developing models for material removal rate and surface roughness correlating three process parameters which are peak current, pulse-on time and gap voltage using response surface methodology. The models were verified with 7% error between the results of empirical models and the experimental values.

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Section: Effect On Materials Removal Ratesupporting

confidence: 91%

Electro-discharge machining of alumina: Investigation of material removal rate and surface roughness

Ali¹,

Moudood²,

Maleque³

et al. 2017

J. MECH. ENG. SCI.

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“…It is apropos that addition of both types of metal powder in distilled water resulted in improved and continuous sparking across the electrodes. In powder mixed EDM (PMEDM), material removal rate (MRR) increases due to the addition of metal powder in dielectric (Kansal et al, 2005;Singh et al, 2014) but in the presented work MR decreases. In both, EDM and WEDM, addition of conductive metallic powders in dielectric fluid reduces the insulating strength of the dielectric fluid and increases the discharge channel for a given value of discharge parameters (Kansal et al, 2005).…”

Section: Effect On Machining Rate (Mr)mentioning

confidence: 71%

“…In the field of die sinking EDM, many investigations have been carried out using metal powder additives in dielectric medium to improve the MRR and surface characteristics. Conductive metal powder reduces the dielectric strength of the fluid and thereby increases the spark energy across the two electrodes, thus, enhances the stability of the process and improves the performance measures (Kansal et al, 2005;Sidhu et al, 2014). As per the literature available, no research work found on powder mixed dielectric in WEDM.…”

Section: Literature and Motivation For Present Workmentioning

confidence: 99%

An experimental study on trim cutting operation using metal powder mixed dielectric in WEDM of Nimonic-90

Kumar¹,

Jangra²,

Kumar³

2016

10.5267/j.ijiec

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This paper presents an experimental study on rough cut, trim cut using distilled water as a dielectric fluid and Al & Si metal powders in dielectric fluid for WEDM of Nimonic-90. First, the influence of discharge energy (DE) in rough cut is evaluated for machining rate (MR) and surface roughness (SR) and compared with trim cut without any metal powder additives in dielectric fluid. The effect of Al and Si metal powders (varying concentration of 1g/L, 2g/L and 3g/L) in dielectric fluid is studied separately and comparison is also made for MR, SR, recast layer and micro hardness of machined Nimonic-90. From the results it is observed that using trim cut, a fine and uniform surface texture is obtained irrespective of the high discharge energy of rough cut. Al and Si powders additives show a significant reduction in MR for trim cutting operation whereas a remarkable modification is obtained in surface textures after trim cut using metals powder mixed dielectric. SR improves with a concentration of 1g/L and shows a little increase with high concentration of both metals powder. Using metals powder in dielectric fluid, the recast layer becomes smooth and denser and thus, micro hardness increases.

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“…For improving the process performance the semi conductive powder particles are suspended into the dielectric fluid during electro discharge machining (Kumar et al, 2010;Singh et al, 2011). Kansal et al (2005Kansal et al ( , 2007 studied the machining performance of AISI D2 and EN31 steel when silicon powder was suspended in the kerosene dielectric and reported a significant improvement in terms of material removal and surface finish. Bhattacharya et al (2013) studied the surface properties viz.…”

Section: Introductionmentioning

confidence: 99%

Effect of machining parameter on the surface roughness of AISI 304 in silicon carbide powder mixed EDM

Bhaumik¹,

Maity²

2017

10.5267/j.dsl

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Parametric optimization of powder mixed electrical discharge machining by response surface methodology

Cited by 365 publications

References 19 publications

Electro-discharge machining of alumina: Investigation of material removal rate and surface roughness

Electro-discharge machining of alumina: Investigation of material removal rate and surface roughness

An experimental study on trim cutting operation using metal powder mixed dielectric in WEDM of Nimonic-90

Effect of machining parameter on the surface roughness of AISI 304 in silicon carbide powder mixed EDM

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