Abstract
This paper deals with the machining characteristics in impulse discharge as a basic study on electrical discharge machining, Using model electrodes with various pointed end shapes, the gap voltage, discharge current, discharge energy, and the shape and volume of the discharged crater are measured. On the basis of these measured results, the effect of the pointed end shape of electrode on machining characteristics is discussed. The results obtained are as follows:
1) The gap voltage is not constant during discharge but varies depending on the pointed end shape of the electrode.
2) As the sharpness of the pointed end of the electrode increases, the diameter and the depth of the discharged crater become larger and deeper, and the volume of the discharged crater becomes larger.
