Automatic electric discharge machining method and apparatus with

Details Automatic electric discharge machining method and apparatus with Automatic electric discharge machining method and apparatus with

1990-04-23

1992-02-25

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

B23H 720

Patent

active

050916203

ABSTRACT:
A method and apparatus for electric discharge machining whereby the total machining time to machine a workpiece through coarse, medium and finish surface roughness stages is significantly reduced. Machining condition data for the three surface roughness stages is stored in a memory. As the machining progresses, the surface roughness of the workpiece is monitored. If the surface roughness is found to exceed the reference level for the corresponding stage, machining using the present conditions is continued, whereas, if the surface roughness is below the reference level, the machining conditions are switched to those of the next stage.

REFERENCES:
patent: 3400238 (1968-09-01), Zemberry
patent: 4045641 (1977-08-01), Ullmann et al.
patent: 4052583 (1977-10-01), Inoue
patent: 4394558 (1983-07-01), Inoue
patent: 4559434 (1985-12-01), Kinoshita
patent: 4606007 (1986-08-01), Inoue
patent: 4623772 (1986-11-01), Fery et al.
patent: 4628170 (1986-12-01), Furukawa
"A Real `Rough` Story" by Wijers in EDM DIGEST, Oct. 1985, vol. VII, No. 5, pp. 16-22.

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