Electric heating – Metal heating – Cutting or disintegrating
Patent
1990-03-16
1991-08-27
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
219 6917, B23H 706
Patent
active
050435515
ABSTRACT:
A wire cut-type electric discharging method of machining a work for machining a portion having a predetermined taper wherein the portion to be machined comprises a first straight section, a second straight section extending in parallel to the first straight section and an arc-shaped section located between the first and second straight sections. A vector is derived representing a positional relationship among a number of corresponding positions on two machining tracks each comprising a first straight track, an arc-shaped track and a second straight track. The first straight tracks, the arc-shaped tracks and the second straight tracks are formed by allowing the portion to be machined to intersect the upper and lower surfaces of the work. A start point and an end point of the arc-shaped track constituting one of the machining tracks are determined by displacing a start point and an end point of the arc-shaped track constituting the other machining track by a magnitude of the vector. Thus, the other machining track is determined subsequent to the determination of the one machining track. The portion to be machined is machined by displacing a wire serving as an electrode along both the machining tracks.
REFERENCES:
patent: 4467166 (1984-08-01), Gamo et al.
patent: 4644124 (1987-02-01), Hori et al.
patent: 4700314 (1987-10-01), Kinoshita
patent: 4843203 (1989-06-01), Gamo et al.
Evans Geoffrey S.
Mitsubishi Denki K.K.
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