STUDY OF SURFACE ROUGHNESS FOR DISCONTINUOUS ULTRASONIC VIBRATION ASSISTED ELECTRIC DISCHARGE MACHINING USING RSM

Jujhar Singh, Sukhvir Singh, Gurpreet Singh

Abstract: The objective of this paper is to study the effects of response parameters on the performance characteristics in the Ultrasonic vibration Assisted Electric Discharge Machining (UEDM) Process. Response Surface Methodology (RSM) is used to investigate the effect of amplitude of vibration, peak current, pulse on-time, machining time and flushing pressure. To study the proposed second order polynomial model for surface roughness (SR), a Central Composite Design (CCD) is used for the estimation of the model coefficients of five factors, which are believed to influence the SR in UEDM process. Experiments are conducted on Aluminum alloy 6063 with copper electrode. The response is modeled on experimental data by using RSM. The separable influence of individual machining parameters and the interaction between these parameters are also investigated by using analysis of variance (ANOVA). It is found that amplitude of vibration, peak current; pulse-on time, flushing pressure and most of their interactions have significant affect on SR.

Keywords: Central Composite Design, SR, UEDM, RSM, Aluminum alloy (Al6063)

DOI: https://doi.org/10.15623/ijret.2013.0211110