Method and electrode for forming passages in workpieces

Details Method and electrode for forming passages in workpieces Method and electrode for forming passages in workpieces

1990-03-30

1991-10-22

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204224M, 204280, 204284, B23H 914, B23H 304

Patent

active

050592890

ABSTRACT:
A deformable electrode for electrochemical machining (ECM) of passages, in particular curved passages or passage sections in workpieces, is constructed from a deformable, electrically insulating tube having electrically conductive electrode tip means arranged around the end of the tube to form the working tip of the electrode. Electrical conductor means are connected to the electrode tip means and extend along the tube. During ECM of a passage an electrolyte solution is supplied along the center of the tube, and a voltage is applied between the workpiece the electrode tip means, via the conductor means, so that dissolution of the workpiece occurs near the electrode tip means at the working face of the passage being machined.

REFERENCES:
patent: 3306838 (1967-02-01), Johnson
patent: 3485744 (1969-12-01), Schaffner
patent: 3696014 (1972-10-01), Goodard et al.

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