Method and apparatus for electric discharge machining

Details Method and apparatus for electric discharge machining Method and apparatus for electric discharge machining

1994-03-28

1996-03-12

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

B23H 100

Patent

active

054988489

ABSTRACT:
A method and apparatus for micro-electric discharge machining that machines electrically resistant materials having high volume resistivity, such as Mn--Zn ferrite or single crystal silicon material, with a ciruit including an electrode connected to a positive terminal of a power supply and the workpiece of electrically resistant material is connected to a negative terminal of a power supply. The circuit can include a capacitor having a capacitance less than 5000 pF.

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patent: 3558843 (1971-01-01), O'Connor
patent: 4596066 (1986-06-01), Inoue
patent: 4625085 (1986-11-01), Yoshida et al.
patent: 4753903 (1988-06-01), Saito
patent: 4771157 (1988-09-01), Sato et al.
patent: 4847463 (1989-07-01), Levy et al.
patent: 4900890 (1990-02-01), Masaki et al.
"Choice of EDM Tooling, Part II", by Carter et al., EDM Digest, vol. 3, No. 2, Apr. 1981, pp. 18-21, 24.
"Study on Micro-Hole Drilling by EDM" by Masuzawa et al., Bulletin of Japan Society of Precision Engg., vol. 20, No. 2, Jun. 1986, pp. 117-120.

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