Electric heating – Metal heating – Cutting or disintegrating
Patent
1991-10-02
1993-03-23
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
219 6914, B23H 702, B23H 736
Patent
active
051966662
ABSTRACT:
A wire-cut electric discharging machine comprises a processing tank with an opening in one wall for the insertion of the lower arm unit. The lower arm unit is enclosed by a cylindrical pipe. The opening in the wall of the tank is sealed by a slide plate which moves in a direction parallel to the wall of the tank. Bellows interconnect the slide plate to the pipe 10 thereby providing a seal between the slide plate and pipe. The bellows expand and contract thereby allowing the processing tank to move along the axis of the lower arm unit while still providing a seal. Machining fluid flows through the pipe and around the lower arm unit. The fluid maintains the temperature of the lower arm unit at a constant value. The pipe protects the lower arm unit from being directly affected by the hydraulic pressure in the tank and also from being affected by motion of the tank. The sealing resistance for when the processing tank moves along the axis of the lower arm unit is significantly reduced.
REFERENCES:
patent: 4565915 (1986-01-01), Girardin
patent: 4647747 (1987-03-01), Goto
patent: 4808786 (1989-02-01), Shinkai et al.
patent: 4918279 (1990-04-01), Babel et al.
patent: 4992640 (1991-02-01), Tanaka et al.
patent: 5028757 (1991-07-01), Aramaki et al.
Evans Geoffrey S.
Sodick Co. Ltd.
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