Electric heating – Metal heating – Cutting or disintegrating
Patent
1998-12-21
2000-08-22
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
219 6912, 219 6918, B23H 102, B23H 704
Patent
active
061075930
ABSTRACT:
A wire electric-discharge machining apparatus with recycled electric power is provided, which can recycle the energy stored in the inductor of the discharge circuit to be used as the power source to both the ignition circuit and the discharging circuit, so that the use of electric power is more cost-effective. The wire electric-discharge machining apparatus is of the type having a positive-voltage ignition circuit, a negative-voltage ignition circuit, a discharging circuit, and a snubber circuit. The improvement to the wire electric-discharge machining apparatus comprises: a first voltage converting circuit coupled between the snubber circuit and the positive-voltage ignition circuit; a second voltage converting circuit coupled between the snubber circuit and the negative-voltage ignition circuit; and a third voltage converting circuit coupled between the snubber circuit and the discharging circuit. This foregoing wire electric-discharge machining apparatus is capable of recycling the excessive energy that is intended to be drained out in the prior art into reused power to the ignition circuit and discharging circuit. As a result, the wire electric-discharge machining apparatus not only can help save power consumption and thus electricity cost, but also can help prevent the excessive energy to cause damage to the internal circuitry of the wire electric-discharge machining apparatus.
REFERENCES:
patent: 4447713 (1984-05-01), Tsurumoto et al.
patent: 4940872 (1990-07-01), Futamura
patent: 5111017 (1992-05-01), Futamura et al.
patent: 5317122 (1994-05-01), Ito et al.
patent: 5986232 (1999-11-01), Kaneko et al.
Li Hsi-Pin
Li Hsiang-Kuo
Liang Jui-Fang
Tsai Cheng-Fu
Evans Geoffrey S.
Industrial Technology Research Institute
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