EDM Machine (Electrical Discharge Machine)

EDM is a process of metal removal based on the principle of erosion of metals by an interrupted electric spark discharge between the electrode tool (usually cathode) and the work (anode). This method is primarily used for hard metals or those that would be difficult to machine with traditional techniques. This process is most widely used by the mould making,tool and die industries.

Electrical discharge Machine can be used to ma- chine conductive material of any hardness (for example steel or titanium) to an accuracy of upto one thousand of a millimeter with no mechanical action.

The EDM process is commonly used in tool and die industry for mould making, however in recent years EDM has become an integral part for mak- ing prototype and production parts .This is seen in aerospace and electronics industries where pro- duction quantities remain low.