| 摘要 |
PURPOSE:To increase electrospark machining speed by giving high order forcible vibration to a wire electrode and changing the repetitive number of the electrospark machining depending on the thickness of a workpiece. CONSTITUTION:Pulse voltage is applied cross a workpiece 3 and a wire electrode 1 by a power supply 10 for electrospark machining. A high order forcible vibraton is given to the wire electrode 1 by a vibration device 4 to provide a plurality of bellies and knots. The change in the plate thickness of the workpiece 3 when it is cut is detected by a detector 12 and the frequency of applied pulse voltage of the power source 10 is controlled by this plate thickness detecting signal. As the plate thickness becomes thicker, the repetitive number of discharge is increased. Since the high order vibration is given to the wire electrode 1, the number of bellies in the plate thickness can be increased dependently on the plate thickness to improve working speed. |
