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

Abstract

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.

Experimental investigations on EDM of Ti6Al4V with planetary tool actuation

“…Apart from the applications for generating features by 3D tool actuation, work has also been reported on 2D tool electrode actuation in radial directions for boring circular holes [18]. Centrifuge action of the workpiece proportional to rotational motion of the tool electrode has also been reported for improving efficiency of EDM drilling process [19].…”