Apparatus and method for controlling the intermittent retraction

Details Apparatus and method for controlling the intermittent retraction Apparatus and method for controlling the intermittent retraction

1977-07-20

1980-01-22

Reynolds, Bruce A.

Electric heating

Metal heating

Cutting or disintegrating

219 69C, B23P 108

Patent

active

041851846

ABSTRACT:
A process and apparatus for controlling the retraction of the electrode tool of an EDM machine such as to maintain the material removal rate to a value approaching the maximum theoretical value. The control system comprises monitoring the machining rate for providing an average value of the material removal rate during at least a time interval corresponding to a single retraction period of the electrode, and varying the frequency of subsequent retractions of the electrode as a function of that average value such as to consistently maintain a material removal rate which is self-adaptive and tends to reach a maximum theoretical value.

REFERENCES:
patent: 3474216 (1969-10-01), Morgan
patent: 3875374 (1975-04-01), Inoue
patent: 4004123 (1977-01-01), Inoue
patent: 4045641 (1977-08-01), Ullmann et al.
patent: 4057703 (1977-11-01), Pfau

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