Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1979-12-19
1981-04-28
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
2041295, 2041297, 204225, 204DIG9, B23P 100, B23P 102, B23P 114
Patent
active
042644178
ABSTRACT:
A method of electrochemical processing comprises the steps as follows: maintaining a variable gap between a processing electrode and a work-piece, having a value equal to a minimum permissible gap corresponding to processing conditions; with the gap value reaching a critical value, moving the processing electrode to obtain a gap approximately equal to or less than the critical value; applying a train of voltage pulses; and changing the length of each pulse and/or the space interval between pulses. When the space interval becomes equal to a value commensurate with the time of withdrawal of the processing electorode, a single voltage pulse is applied.
An apparatus for chemical processing comprises two pickups to sense the gas content of the interelectrode space, open of said pickups being coupled to the drive means control unit, a pickup to sense the state of contact of the processing electrode and the workpiece, a processing duty decoder coupled to a program control unit to control the movement of the processing electrode. The apparatus also comprises a control signal decoder to decode control signals characteristic of the required gap, a gap value program control unit, and a control unit to control the operating duties of the voltage source.
REFERENCES:
patent: 3378473 (1968-04-01), Inoue
patent: 4097710 (1978-06-01), Maillet
patent: 4125444 (1978-11-01), Inoue
patent: 4160710 (1979-07-01), Greenwood
Nastasy, V. K. "Protection of Electrodes of Electrochemical Machines from Short Circuits," Machines and Tools, No. 5, 1973, p. 21.
USSR Inventor's Certificate No. 205,489, Int. Cl.CZ3B 3/00, Bulletin of Inventions and Discoveries No. 23, 1967.
Alexeev Genrikh A.
Isakova Roalda B.
Livshits Abram L.
Nastasy Viktor K.
Prasolov Jury F.
Kaplan G. L.
Valentine D. R.
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