WIRE EDM FUNDAMENTALS | wire EDM filters
Today’s wire electrical discharge machines have many features and improvements from machines manufactured in the past. This paper is intended to give you a better understanding and basic overview of the fundamentals, features and practical uses of Wire EDM.
HISTORY
The beginning of EDM came during the Second World War, when two Russian physicists B.R. and N.I. Lazarenko published their study on The Inversion of the Electric Discharge Wear Effect. which related to the application to manufacturing technology of the capacity of electrical discharges, under controlled distribution, to remove metal. EDM was being used at that time to remove broken taps and drills. The early “Tap-Busters” disintegrated taps with hand fed electrodes, burning a hole in the center of the tap or drill, leaving the remaining fragments that could be picked out. This saved workpieces and very expensive parts from being scrapped and having to be made over again. This process opened the birth of Vertical EDM, also called: Sinker, Conventional, Ram, Plunge or Diesinker EDM’s. These machines were, and still are primarily used to make precision cavities in metal primarily for the mold industry.
