INTERNATIONAL JOURNAL OF ENGINEERING, SCIENCE AND - Volume 6, Issue 1 , March 2017

Pages: 50-73

Date of Publication: 25-Mar-2017

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Performance of P/M Cu/SiCp metal matrix tool electrode in Electrical Discharge Surface Grinding (EDSG) of AISI D2 Die steel

Author: Rajesh Choudharya*, Harmesh Kumarb, Shankar Singhc

Category: Engineering, Science and Mathematics

Abstract:

In this experimental study metal matrix composite tool electrodes are fabricated by powder metallurgy route for electrical discharge surface grinding process. A rotary spindle attachment was fabricated and mounted on EDM machine to develop EDSG set up. Investigation related to performance measures namely metal removal rate, electrode wear rate and surface roughness was carried out by selecting the input parameters like peak current, gap voltage, on time, off time, speed, abrasive particle size and abrasive particle concentration. The experimental study indicated that material removal rate and electrode wear rate increases with increase in gap current and rotational speed of the tool electrode. The effect of current and speed during the hybrid process is participative and hence contributes to increased material removal rate and electrode wear rate. Surface roughness increases with increase in gap current and decreases with increase in rotational speed of the tool electrode. The role of abrasives in composite tool electrode was observed to be more pronounced at higher rotational speeds during the process.

Keywords: Electroless copper plating, metal matrix composite, abrasives, particulates, Electrical Discharge Surface Grinding