Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1979-05-01
1980-12-02
Mack, John H.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
20412946, 204DIG9, 219 69V, 219 69M, 219 69P, B23P 104, B23P 110, C25F 302, C25F 700
Patent
active
042369851
ABSTRACT:
The invention is applicable to the griding with current-conducting abrasive tools of works of current-conducting churlish materials, such as hard, magnetic and refractory alloys, and to cutter sharpening.
The method according to the invention consists in applying voltage pulses to a tool and a work placed in a liquid medium with a conductance of 10.sup.-4 to 2.multidot.10.sup.-2 ohm.sup.-1 .multidot.cm.sup.-1.
The process of grinding the work and electric-erosion cleaning the tool is carried out at a pulse duration of 0.5 to 10 msec, pulse repetition frequency of 10 to 500 Hz, and amplitudie of pulses ranging from a minimum of 3 V to a maximum which is below a level required for a breakdown of the liquid medium between the tool and the work.
Alternatively, simultaneously with machining the work the electric-erosion truing of the tool is performed with the use of a tool truing electrode.
The tool truing electrode and the work are connected to the same pole of a power source.
According to an alternative embodiment, the truing electrode is a nozzle intended to direct a liquid medium into the machining zone.
REFERENCES:
patent: 2905605 (1959-09-01), Keeleric et al.
patent: 3851135 (1974-11-01), Moracz et al.
patent: 4013526 (1977-03-01), Inoue
patent: 4125444 (1978-11-01), Inoue
Grinberg Aron K.
Grodzinsky Eduard Y.
Isakova Roalda B.
Makonovitskaya Anna T.
Zubatova Lidia S.
Mack John H.
Valentine D. R.
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