Study On Cutting Tools wear In EDM Process

Mohd Rushimin , Mohd Amin (2006) Study On Cutting Tools wear In EDM Process. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Copper electrode with diameter of 10, 20 and 30 mm and mild steel as the workpiece is used in the electro discharge machining (EDM) at two various current of 3A and 6A with the objective of determine the relation between electric current and the wear rate. There are one machining test that is current effect to the cutting process with the time is different. The electrode and workpiece wear rate is obtained by measuring the mass loss percentage. The wear rate can be calculated by using this data. The basics system consists of a shaped tool (electrode) and the workpiece connected to a de power supply and placed in a dielectric (electrically nonconducting) fluid. When the potential difference between the tool and the workpiece is sufficiently high, a transient spark discharges through the fluid, removing a very small amount of metal from the workpiece surface. The capacitor discharge is repeated at rates of between 50 kHz, with voltages usually raging between 50V and 380V and currents from 0.1 A to 500A.

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