Material removal characteristics of microslot (kerf) geometry in μ-WEDM on aluminum

Somashekhar, K. P.; Ramachandran, N.; Mathew, Jose

doi:10.1007/s00170-010-2645-z

Cited by 40 publications

(21 citation statements)

References 25 publications

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“…Figure 7a-c shows the three-dimensional response surface and contour plot for the response overcut in terms of process parameters pulse on time and spark gap voltage at a pulse off time of 28 ls, peak current of 160 A, wire feed of 7 m/min and wire tension of 950 g. From the three-dimensional plots it was observed that the overcut increased by increasing the pulse on time simultaneously decreased of spark gap voltage with value of 26.85-34.07 lm. It was found that by decreasing the spark gap voltage lowers the spark gap and increasing the molten metal in the gap due to its high thermal energy [39]. Figure 7d-f shows the three-dimensional response surface and contour plot for the response overcut in terms of process parameters pulse off time and peak current at a pulse on time of 0.9 ls, spark gap voltage of 50 V, wire feed of 7 m/min and wire tension of 950 g. It was observed from these figures that the overcut is increased by increasing the pulse off time from 17 to 38 ls simultaneously overcut decreased with decreasing peak current from 200 to 120 A.…”

Section: Effect Of Process Parameters On the Overcutmentioning

confidence: 98%

“…The results suggested that to achieve the highest metal removal rate (MRR), applied current was the most influential among current, pulse duration and electrolyte concentration. Somashekhar et al [39] using DT110 Multiprocessor Micromachining Centre having resistorcapacitor (RC) pulse generator with l-WEDM attachment. In l-WEDM process, when MRR is higher and overcut (OC) and SR is lower, the performance characteristics are found to be better.…”

Section: Literature Reviewmentioning

confidence: 99%

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Semi-empirical model on MRR and overcut in WEDM process of pure titanium using multi-objective desirability approach

Kumar¹,

Kumar

Kumar³

2014

J Braz. Soc. Mech. Sci. Eng.

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Titanium and its alloys have been experiencing extensive development over the past few decades stimulated by a series of their unique properties, i.e. high strength to weight ratio maintained at elevated temperature, high hot hardness, high fracture resistance, and exceptional resistance to corrosion at temperature below 500°C. Machining of titanium, however, is considered as cumbersome with the conventional manufacturing practices, and there is a critical need for developing and establishing cost-effective methods of machining. This research work is mainly focused on the effect of WEDM parameters, such as pulse on time, pulse off time, peak current, spark gap voltage, wire feed rate and wire tension has been varied to investigate their effect on material removal rate and overcut for pure titanium. The experiments are planned, conducted, and analyzed through response surface methodology. An attempt has also been made to construct a micro-model for prediction of material removal rate using dimensional analysis. The predictions from this model have been validated by conducting experiments.

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Section: Effect Of Process Parameters On the Overcutmentioning

confidence: 98%

Section: Literature Reviewmentioning

confidence: 99%

Semi-empirical model on MRR and overcut in WEDM process of pure titanium using multi-objective desirability approach

Kumar¹,

Kumar

Kumar³

2014

J Braz. Soc. Mech. Sci. Eng.

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“…Due to increase in pulse on time, discharge energy in the spark gap increases. At high level of discharge energy in the spark gap leading to higher overcut[24], the overcut was observed p a r k g a p v o l t a g eA : p u l s e o ff t i m e e a k c u r r e n t B : p u l s e o ff t i m e Overcut (b)…”

mentioning

confidence: 99%

Experimental Investigation on Material Transfer Mechanism in WEDM of Pure Titanium (Grade-2)

Kumar¹,

Kumar

2013

Advances in Materials Science and Engineering

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This research work mainly focused on experimental investigation on material transfer mechanism in WEDM of pure titanium. The effects of machining parameters such as pulse on time, pulse off time, peak current, spark gap voltage, wire feed, and wire tension on the material removal rate (MRR), overcut, and surface roughness for pure titanium in WEDM process were explored. The selected machined samples were analyzed using energy dispersive X-ray analysis, scanning electron microscope, and X-ray diffraction techniques. It was observed from the results that a significant material transfer occurred from the dielectric, as well as tool, electrode on the work surface either in free form and/or in compound form. Also the multiresponse optimization of process parameters was done using desirability approach. The predictions from this model were validated by conducting experiments.

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“…The debris sticks on the workpiece trap and may cause unwanted spark. The unwanted sparks result in tool material erosion, which results in less material removal, as the significant amount of spark energy is used in sparking with debris, leading to less kerf width [15]. Interaction plots of spark gap voltage and wire tension are illustrated in 6.…”

Section: Discussionmentioning

confidence: 99%

Effect of Process Parameters on Kerf Width in WEDM for HSLA Using Response Surface Methodology

Gupta¹,

Khanna²,

Gupta³

et al. 2012

J Eng Technol

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Wire electric discharge machine (WEDM) is a spark erosion machining process to cut very hard conductive material with the help of a wire electrode. High strength low alloy steel (HSLA) is a hard alloy with high hardness and wear resisting property. The purpose of this study is to investigate the effect of parameters on kerf width for WEDM using HSLA as workpiece. HSLA is used in cars, trucks, cranes, bridges, roller coasters and other structures that are designed to handle large amounts of stress. It is revealed that kerf width decreases with increase in pulse on time, pulse off time, spark gap voltage and peak current. Kerf width increases with increase in wire tension. In order to evaluate the effect of selected process parameters, the response surface methodology (RSM) is used to formulate a mathematical model which correlates the independent process parameters with the desired kerf width. The central composite rotatable design has been used to conduct the experiments. The analysis of results indicates that the spark gap voltage, pulse on time, peak current and pulse off time have a significant effect on kerf width. ABSTRACTAccess this article online Website: www.onlinejet.net Neeraj Sharma passed his B.Tech. in 2006 from Kurukshetra University (Kurukshetra). After completing his graduation he serves the industry for three year. Now he is Pursuing his Master Degree from M. M. Engineering Collage. He has two year of teaching experience in R.P. Inderaprastha Institute of Technology (Karnal), Haryana. His areas of interest are design of experiments, Conventional and Non conventional Machining method and optimization Techniques.

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Material removal characteristics of microslot (kerf) geometry in μ-WEDM on aluminum

Cited by 40 publications

References 25 publications

Semi-empirical model on MRR and overcut in WEDM process of pure titanium using multi-objective desirability approach

Semi-empirical model on MRR and overcut in WEDM process of pure titanium using multi-objective desirability approach

Experimental Investigation on Material Transfer Mechanism in WEDM of Pure Titanium (Grade-2)

Effect of Process Parameters on Kerf Width in WEDM for HSLA Using Response Surface Methodology

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