Abstract:EDM technology has become a mature and indispensable processing method after continuous and rapid
development for many years. New processes, methods and equipment emerge in an endless stream. How to improve the
machining efficiency has become the focus of human attention, but it is not obvious to improve the processing efficiency
through various processing methods. The electrical discharge machining must avoid arc discharge in order to prevent damage
to the workpiece. However, if we can control the break-make process of the arc effectively and remove workpiece
material by using high energy density of arc, it will improve the efficiency of discharge machining greatly. This is a new
direction of high efficiency discharge machining in recent years. In addition, EDM ablation uses spark discharge as the induced
energy to cause a controlled combustion reaction between metal matrix and the incoming oxygen. It uses chemical
energy produced by the combustion reaction to remove workpiece material. The energy of ablation is much larger than that
of pulse power supply, and it is another new direction of high efficiency discharge machining. This paper summarizes the
research status of high efficient processing methods, including EDM, arc discharge machining and electrical discharge ablation
machining.