State of the art micro-EDM drilling using centrifugal servo-mechanism for workpiece actuation

In this experimental investigation, a centrifugal servo-mechanism has been used for actuation of the cylindrical components such as nozzles and dies during micro-EDM drilling process. With simultaneous centrifugal actuation of the workpiece proportional to the electrode rotation, it is possible to apply concentric roughing and eccentric finishing strategies. For improvement of micro-hole quality, eccentric workpiece rotation has been developed as a finishing strategy which promotes flushing condition, removes hole inclination, produces core-free blind holes, and reduces machining time in micro-EDM drilling process.