Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 13, 2017 - November 17, 2017
Machining characteristics of electrochemical machining with ultrashort pulses were investigated using numerical analysis considering the inductance of a power supply circuit. In an actual pulse power supply circuit of ECM, the stray inductance exists in the electric feeders. Because the stray inductance influences the flow of the pulse current, the formation of the electric double layer is affected by the inductance. In order to investigate the influence of the inductance on the machining characteristics, numerical analysis was carried out considering the inductance of the power supply circuit. Analytical results shows that the inductance decreases the current flowing through the machining gap when pulse voltage is applied. Therefore, the longer pulse duration of pulse power supply is necessary to form the electric double layer when the inductance is larger. The effect of ultrashort voltage pulses is limited due to the inductance because the voltage continues to be applied to the working gap for a while even after the pulse voltage becomes low.
