| Title |
A Study on the Discharge Guide Technology by Infrared Laser Applied to Discharge Processing Devices |
| Abstract |
In recent years, concern has been raised about the technique of controlling electrical breakdown by using laser in many fields. Especially, laser has attracted much attention in the Electo-Discharge Machining(EDM) because of its many merits. Therefore, this research has been performed to obtain fundamental data for the discharge guide technology by a pulsed Nd:YAG laser which can be applied to discharge processing machining. The experiments of laser-guided dc discharge have been carried out at low air pressure ranging from 0.2 to 20 torr. The minimum laser-guided dc discharge voltage VG.min at the given pressures P and distances d between anode and a cathode was measured. It is found that VG.min is much lower than the natural discharge voltage VND, and the values of VG.min and VND as a function of P·d has a similar tendency. The laser output energy Eout decreases with input pulse duration tp increasing, and the more the value of tp increases, the higher that of VG.min is obtained because the comber of photons N decreases with tp increasing. In addition, the laser-guided dc discharge range and the discharge guide characteristics as laser output Eout was investigated. |