Spark erosion machine tool

Details Spark erosion machine tool Spark erosion machine tool

1989-11-22

1991-07-02

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

219 6915, B23H 726

Patent

active

050287559

ABSTRACT:
A spark erosion machine tool is equipped with a drive head carrying, at an angle to its moving direction, a plurality of drive slides, with a stationary work piece holder, and with a plurality of movable spark erosion electrode mounting bucks. The drive slides (4) cooperate with the mounting bucks (20) for converting the movement of the drive head into a movement of the spark erosion electrodes. For example, when the drive head is a ring, its axial movement relative to a round work piece, such as a combustion chamber of a jet engine, is converted into radial movements of the erosion electrodes for plunge cutting cooling slots or openings into the outer jacket of the combustion chamber. Thus, many slots can be cut simultaneously. The movable mounting bucks (20) carry electrode holders (16) and the bucks are movably supported on guide rods (25) in the stationary work piece holder. The electrodes with their holders are guided in slots (14) of the work piece holder. The drive slides (4) are guided in slots (15) of the work piece holder (13).

REFERENCES:
patent: 2909640 (1959-10-01), Fairbrother
patent: 3816693 (1974-06-01), Braun
patent: 3890481 (1975-06-01), Buck
patent: 3920947 (1975-11-01), Wachtell et al.
patent: 4950860 (1990-08-01), El-Menshawy
"Elektroerosive Metallbearbeitung", by M. Feurer, Vogel Verlag, Wuerzburg, 12/1983, p. 25, FIG. 2.4.

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