Electric heating – Metal heating – Cutting or disintegrating
Patent
1988-09-01
1990-02-13
Pellinen, A. D.
Electric heating
Metal heating
Cutting or disintegrating
219 6912, B23H 100, B23H 702, B23H 914
Patent
active
049008900
ABSTRACT:
An electric discharge machining system of machining a microshaft by electric discharge made between the microshaft and a conductive wire used as a working tool. The microshaft is vertically supported by a bearing to be rotatable about its own axis and movable up and down in directions of the axis by a microshaft driving device and the wire is arranged to travel in a direction of its own axis and to be movable in directions close to and away from the microshaft by a wire driving device, whereby the wire is relatively movable with respect to the microshaft in horizontal and vertical directions. On the electric discharge machine, a control unit controls the microshaft driving device and wire driving device so that the wire is moved up to a predetermined position horizontally away by a first predetermined distance from a first reference point in the horizontal directions that the axis of the wire intersects the axis of the microshaft and the microshaft is moved vertically by a predetermined distance with respect to the wire with the wire travelling in the direction of its own axis and the microshaft being rotated about its own axis. As a result, the microshaft is machined to have a diameter equal to twice the first predetermined distance and the machined portion of the microshaft has a length corresponding to the second predetermined distance.
REFERENCES:
patent: 4598190 (1986-07-01), Balleys
patent: 4654498 (1987-03-01), Sato
patent: 4725704 (1988-02-01), Vuichard
patent: 4771157 (1988-09-01), Sato et al.
"Electro-Discharge Machine for Micro-Hole Boring" by Takeo Sato et al.; National Technical Report, vol. 31, No. 5, Oct. 1985, pp. 105-113.
Masaki Takeshi
Mizutani Takeshi
Tanaka Akemi
Yonemaochi Katsutoshi
Evans Geoffrey S.
Matsushita Electric - Industrial Co., Ltd.
Pellinen A. D.
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