| 摘要 |
<p>The method in essence involves working the blank mechanically to give it its final shape as a blade component (4), heat treatment (hardening) of the component (4) and subsequent mechanical removal of the allowance on the outer surface of the component (4) to give it its final dimensions. Grooves (1) are then cut electrochemically, with the aid of a power source (2) with a sharply falling voltage-current characteristic. During the electrochemical processing, one of the electrodes (3, 4) is made to oscillate in synchrony with the voltage pulses applied thereto whenever the electrodes (3, 4) are closest together; actual voltage is monitored, and surges occurring when the electrodes (3, 4) move closer together or move apart are registered, and the feed rate of one of the electrodes (3, 4) is adjusted in line with the deviations of the measured voltage pulse values from the standard pulse values. The stability of the process is gauged by the absolute values of the difference in relative resistances offered by the gap between the electrodes, at differing degrees of proximity, to the preceding and subsequent voltage pulses. Once the grooves (1) have been cut, the allowance on the inner surface of the grid is removed and the outer surface is given its final polish.</p> |
