Method and apparatus for the electroerosive working of workpiece

Details Method and apparatus for the electroerosive working of workpiece Method and apparatus for the electroerosive working of workpiece

1985-05-10

1987-04-07

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204224M, 204DIG9, 204228, 219 69C, 219 69P, B23H 102, B23H 302, B23H 704, B23H 714

Patent

active

046558888

ABSTRACT:
In the electroerosive machining of workpieces with the aid of a tool electrode, a pulse-like d.c. voltage is applied between the workpiece and electrode, the applied voltage being in the form of pulse groups where the pulse groups are formed of individual pulses having current amplitudes of selected magnitudes. Preferably, the individual current pulses belonging to the pulse group have successively rising amplitudes. Several individually controllable power switching circuits are connected in parallel to the work gap. The primary side of a pulse transformer connected to each power switching circuit is driven by a control device for the time shaping of the pulse groups. At least one controlled switch belonging to each power switching circuit is connected to a second control device for shaping the current pulse amplitudes.

REFERENCES:
patent: 3607689 (1971-09-01), Inoue
patent: 3655937 (1972-04-01), Ullmann et al.
patent: 3809847 (1974-05-01), Bell, Jr.
patent: 3999028 (1976-12-01), Saito et al.
patent: 4125444 (1978-11-01), Inoue
patent: 4264417 (1981-04-01), Vasiliev et al.
patent: 4310741 (1982-01-01), Inoue
patent: 4392043 (1983-07-01), Inoue
patent: 4503309 (1985-03-01), Inoue

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