| 摘要 |
The electrical discharge machining device comprises a first voltage/current source (U 1 ) for discharge initiation connected to the tool electrode (F) and a workpiece electrode (P) forming the poles of a machining gap (G) and a second voltage/current source (U 2 ) that can be disconnected by way of two switches (SW 1 , SW 2 ). Capacitive elements (C 1 , C 5 ) are mounted in series in the lines ( 10, 11 ) connecting the first source to the poles of the machining gap (G). In addition, these poles can be connected by a self-induction coil (Lm) mounted in series with an adjustable DC source (Sm). Thanks to these features, the energy of the eroding discharges can be significantly reduced in order to obtain a superfine surface finishing process of high quality, while at the same time precisely controlling the mean voltage across the terminals of the machining gap.
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