Method and apparatus for electrolytically assisting the mechanic

Details Method and apparatus for electrolytically assisting the mechanic Method and apparatus for electrolytically assisting the mechanic

1990-01-17

1991-09-03

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041295, 2041296, 204212, 204217, 204224M, B23H 304, B23H 310, B23H 900

Patent

active

050451618

ABSTRACT:
A method and apparatus for electrolytically assisting the mechanical shaping of a workpiece is provided which is particularly useful for precision machining. A tool is used comprising an electrically conductive (copper alloy) tool shank, a cutting tool of an electrically insulating material (reinforced ceramic), and means for flooding a gap, between the tool shank and the localized electrically conductive surface layer to be shaped, with a stream of electrolyte. With the electrolyte flowing, and a low voltage, direct current applied across the gap using the localized, electrically conductive surface layer as the anode and the tool shank as the cathode, the structure of the localized, electrically conductive surface layer of the workpiece just ahead of the tool is weakened structurally sufficiently to be removed easily by the cutting tool in discrete form and carried away from the tool by the stream of electrolyte. The structural weakening of the surface layer, rather than electrolytic removal thereof, is obtained by using an appropriate d.c. current only for a sufficient length of time for the surface layer to be structurally weakened.

REFERENCES:
patent: 2739935 (1956-03-01), Kehl et al.
patent: 2793992 (1957-05-01), Heuser
patent: 3017340 (1962-01-01), Williams
patent: 3130138 (1964-04-01), Faust et al.
patent: 3424054 (1969-01-01), Cook et al.
patent: 3565775 (1971-02-01), Bouchet et al.
patent: 3650936 (1972-03-01), Towle
patent: 3852176 (1974-12-01), Rosenthal
patent: 3873512 (1975-03-01), Latanision

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