Method for the treatment of surfaces of a workpiece of carbon-co

Details Method for the treatment of surfaces of a workpiece of carbon-co Method for the treatment of surfaces of a workpiece of carbon-co

1982-05-17

1984-11-20

Hearn, Brian E.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204224M, 204237, 204212, 204217, 204275, 204DIG10, 408709, 408 40, B23P 102, B23B 2710

Patent

active

044837550

ABSTRACT:
The invention relates to a method and an apparatus for the treatment of surfaces of a workpiece of carbon-containing cast iron, and in particular of blind holes in gray iron cast workpieces, by electrochemical stock removal and mechanical reaming-and-plating. Electrochemical stock removal and mechanical reaming and plating are carried out in separate steps whose operating parameters are independently adjustable, the mechanical stock removal being essentially confined to a reaming-and-plating of the surface which does not entail a closing of graphite flakes. A cylinder bore produced by the method of the invention with desired roughness will have a dark, lustrous surface.

REFERENCES:
patent: 1844316 (1932-02-01), Fryckberg
patent: 1939205 (1933-12-01), Connor
patent: 3296747 (1967-01-01), Philippsen et al.
patent: 3405049 (1968-10-01), Czubak
patent: 3468784 (1969-09-01), Joyce et al.
patent: 3499830 (1970-11-01), Haggerty et al.
patent: 3751346 (1973-08-01), Ellis et al.
patent: 4184794 (1980-01-01), Henninghaus
patent: 4312900 (1982-01-01), Simpson

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