Electric discharge grinding

Tool-electrodes can be fabricated in several ways. An excellent and flexible solution is wire electrical discharge grinding (WEDG), which is well suited for microfabrications [85]. An alternative way is to use anodic etching of tungsten. As shown by Lim et al. [82] very thin cylindrical electrodes (down to 50 pm) with controlled diameters can be fabricated. The important point is to use a high concentration of the electrolyte (typically 5 M KOH) and relatively high current densities around 10 mA/mm2. Thus, the diffusion layer around the electrode can be controlled in order to achieve various tool shapes by anodic... 

Because rhenium is very difficult to machine with carbide tools and other conventional methods, electrical-discharge machining (EDM), electrochemical machining (ROM), abrasive cutting, or grinding is... 

Koshy, P. Jain, V.K. Lai, G.K. Mechanism of material removal in electrical discharge diamond grinding. Int. J. Machine Tools Manuf 1996, id (10), 1173-1185. 

Contrast the manufacture of piercing and blanking press tool dies by conventional machining and grinding, with electrical discharge machining. 

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