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ARTICLE
Year : 2012  |  Volume : 2  |  Issue : 1  |  Page : 1-6

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


1 Department of Mechanical Engineering, Sant Logowal Institute of Engineering and Technology, Logowal, Punjab, India
2 Department of Mechanical Engineering, Maharishi Markandeshwer University, Mullana, India
3 Department of Mechanical Engineering, R.P. Inderaprastha Institute of Technology, Karnal, Haryana, India

Correspondence Address:
Pardeep Gupta
Department of Mechanical Engineering, Sant Logowal Institute of Engineering and Technology, Logowal, Punjab
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0976-8580.94230

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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.


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