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The Electrical Discharge Machining (EDM) is used to drill and mechanize a variety of rigid materials that cannot be cut or shaped by typical tools because of their high hardness or complex shape. The EDM operating principle is based on the interaction between solid matter and the electronic arc discharge. The severe physical conditions around the spark are be used to mill and drill all kind of materials...
A method to enhance the perforation density of porous materials by means of electrical discharges is reported. The method consists in using screening matrices to confine the discharges so as to reduce their lateral excursion.
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