| 摘要 |
An electrochemical machining process using current density controlling techniques is disclosed In the electrochemical machining process of this invention, a carbon cathode rod activated with a negative voltage and a workpiece activated with a positive voltage are sunk into an electrolyte contained in a container, and so the workpiece is electrochemically machined while properly controlling both the metal ion dissolving rate and the metal ion diffusing rate of the workpiece by controlling the amount of applied current to maintain the two rates at a desired balance. This process thus creates a diffusion effect thickening the tip of the cylindrical workpiece, and compensates for a conventional geometric effect sharpening the tip of the workpiece. Therefore, this process produces a precise product having a uniform diameter along its length. In the electrochemical machining process of this invention, the workpiece is ultrasonically washed on its surface with both acetone and distilled water before the process so as to remove impurities from the surface of the workpiece. In addition, the electrolyte is a potassium hydroxide solution having a mole number of 4~6 mol.
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