THE EFFECT OF EDM PARAMETERS ON SURFACE ROUGHNESS AND MATERIAL REMOVAL RATE

Abstract

Electrical discharge machining (EDM) is a process for shaping hard metals and forming deep complex shaped holes by arc erosion in all kinds of electro-conductive materials. The objective of this project is to study the influence of operating parameters of EDM on the machining characteristics such as surface quality, material removal rate and electrode wear. The effectiveness of EDM process is evaluated in terms of the material removal rate, the relative wear ratio and the surface finish quality of the work piece produced. It is observed that copper tungsten is most suitable for use as the tool electrode in EDM. Better machining performance is obtained generally with the electrode as the cathode and the work piece as an anode. In this Project, a study was carried out on the influence of the parameters such peak current, power supply voltage, pulse on time and pulse off time.