Spark erosion system for reducing the height of a honeycomb seal

Details Spark erosion system for reducing the height of a honeycomb seal Spark erosion system for reducing the height of a honeycomb seal

1987-06-02

1989-04-25

Pellinen, A. D.

Electric heating

Metal heating

Cutting or disintegrating

219 691, 219 692, 361 94, B23H 714, B23H 712, H02H 308

Patent

active

048250295

ABSTRACT:
An apparatus for machining metal substrates such as honeycomb seals is provided. The apparatus includes a spindle unit including a motor and shaft. The motor is used for rotating the spindle shaft about its longitudinal axis. The spindle shaft is connected to a power source which converts it and a tool head secured thereto to an electrode. The electrode is positioned in close proximity to a rotating workpiece such that an arc is formed between it and the workpiece. Power to the electrode is adjustable to control the rate of metal removal from the workpiece. Circuitry is used to cut off power to the spindle shaft when the current from the power source exceeds a certain amperage for an extended period of time (such as three seconds to prevent nuisance cut off). The circuitry also allows arcing between the electrode and the workpiece without cutting off power to the spindle shaft.

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patent: 4649255 (1987-03-01), Inoue
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