Electrical discharge machining is versatile among all electrical machining methods. EDM is most precise production procedure for creating complicated or elementary shapes, geometrics components and assemblies. Alloys that are employed in aeronautics is also machined conveniently by this procedure. This process has added advantages of being capable of machining complicated components.
As a result,electrons initiate to flow from cathode to fill and ionized the gap. An electrical breakdown takes place where there is a consistent drop in resistance and discharge of electrical energy. An electric spark with appropriate force and velocity hits surface of the job. Thus, a very high temperature of about 10,000 is generated on the spot of hit by electric spark discharge and this completes the cycle in few micro seconds.This high temperature melts the metal as well as vaporizers it.The melted or vapourised particles of metal are thrown into the gap by electro magnetic and electrostatic forces and are finally driven away by dielectric flowing liquid.
Durning machining, the work pieces isn’t lead through any physical deformation as there is no contact between tool and the job. This makes the procedure more versatile. Consequently, slender and fragile careers could be produced easily.The surface produced by EDM contain a multitide of small craters. This may help in oil retention and better lubrication,specially for components where lubrication is a problem. Electrical discharge machining process can be automated easily requiring very little attention for the machine operator.
