STUDY ON MECHANICAL PULSE ELECTRIC-DISCHARGE MACHINING

In this paper, a mechanical pulse electric discharge machining (MPEDM) technique has been developed to produce holes in the conductive hard and brittle materials, and the mechanism of the MPEDM is described. Th e sparks of electric discharge in the MPEDM are caused by the ultrason ic vibration of the tool, which is used in place of the conventional s pecial pulse generator. Ultrasonic vibration of the tool also acts as a gap-flushing method. Tap water is used as the working fluid in the M PEDM technique. it has been confirmed through the experiments that the MPEDM is effective to attain a higher material removal rate (MRR) for conductive difficult-to-machine materials.