Experimental Investigation of the Effect of Working Parameters on Wire Offset in Wire Electrical Discharge Machining of Hadfield Manganese Steel

Ashok Kumar Srivastava, Surjya Kanta Pal, Probir Saha, Karabi Das

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Department of Me- chanical Engineering, IIT Patna, Bihar;.
Department of Mechanical Engineering, IIT Kharagpur, West Bengal, India;.
Department of Metallurgical and Materials Engineering, IIT Kharagpur, West Bengal, India..

DOI: 10.4236/jsemat.2013.34040                

Abstract

In this study, a series of tests have been conducted in order to investigate the machinability evaluation of austenitic Hadfield manganese steel in the Wire Electrical Discharge Machine (WEDM). Experimental investigations have been carried out to relate the effect of input machining parameters such as pulse on-time (T_on), pulse off-time (T_off), wire feed (W_F), and average gap voltage (V) on the wire offset in WEDM. No analytical approach gives the exact amount of offset required in WEDM and hence experimental study has been undertaken. In this paper, a mathematical model has been developed to model the machinability evaluation through the response surface methodology (RSM) capable of predicting the response parameter as a function of T_on, T_off, W_F and V. The samples are tested and their average prediction error has been calculated taking the average of all the individual prediction errors. The result shows that this mathematical model reflects the independent, quadratic and interactive effects of the various machining parameters on cutting speed in WEDM process.

Keywords

Hadfield Manganese Steel; WEDM; Pulse Time; Wire Offset; Average Gap Voltage; Response Surface Methodology

Conflicts of Interest

The authors declare no conflicts of interest.

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