Electrical Discharge Machining
Electrical Discharge Machining (EDM) is ideal for intricate burr-free cutting of intricate contours or cavities in hard materials, eliminating the need to soften the material before machining, and then re-harden it through heat-treating. The process can be used with stainless steel or other electrically conductive materials including titanium, Hastelloy®, Inconel®, nitinol and Kovar®.
Also called “spark machining,” spark eroding, “burning,” “die sinking,” and “wire erosion,” the process uses electrical discharges between an electrode (the cutting tool) and the work piece, both immersed in a dielectric liquid to remove material from the part.
EDM offers consistent results and is particularly suited for parts requiring tight tolerances. Extra fine surface finishes can be obtained and near perfect perpendicularity achieved using EDM.
MicroGroup has proprietary fixtures, which permit the cutting of extremely small diameters (down to Ø0.005″) and to very short lengths (<0.005″). EDM cutting can produce edges with minimal edge break which may be desired for welding or other joining applications.