| 摘要 |
In the machining of a part (1) by electro-erosion using a wire-electrode (2), when the part has a positive polarity and the dielectric is water, the discharge generator (3) between the part (1) and the wire (2) generates an eddy current called "leak current" which induces on the surface of the part (1) a corrosion called "anodic dissolution". A secondary circuit maintained by a generator (5) between the part (1) and secondary electrodes (6) induces a compensation current, which is antagonist to the leak current, and weakens or eliminates the anodic dissolution of the part (1). Conveniently, the electrodes (6) are mounted on machining heads (7) with interposition of isolating material (8). |
