Abstract
As reported before, the removal rate of the insulating ZrO_2 ceramics were improved using the Zn coated wire tool electrode that had the several rugged types cracks. However, it was the difficult problem to evaluate them qualitatively because of the their in homogeneity. In this report, to investigate the effects of rugged surface of the wire tool electrode on the electrical discharged properties, the new wet blast machine was manufactured. The abrasive grain shape and blast pressure were selected as the experimental factors. The sintered insulated Si3N4 ceramics was used for the workpiece. The following results were obtained: When the blast pressure increased, the rugged depth also expanded lineally and the removal rate increased. The detected discharge waveforms patterns changed with the variation of the blast pressure.
