Method and device for monitoring a spark-eroding process in a sp

Details Method and device for monitoring a spark-eroding process in a sp Method and device for monitoring a spark-eroding process in a sp

1987-08-30

1989-02-21

Pellinen, A. D.

Electric heating

Metal heating

Cutting or disintegrating

2041292, 204224M, 219 69M, 219 69P, B23H 720

Patent

active

048067199

ABSTRACT:
A method and device for monitoring a spark-eroding process in a spark-eroding machine, in which the impulse voltage curve is measured in the working gap and, when the actual voltage curve differs from a desired voltage curve, a control command is produced which changes the process data of the eroding machine. The voltage impulses are thereby, depending on the occurring ignition delay unit (t.sub.d), associated with different impulse groups which are each characterized by a pregiven ignition delay range. The impulses occurring in each impulse group are counted and a control command is produced when a pregiven limit number of successive impulses of one impulse group is exceeded indicating a process degeneration. The control command changes the process data of the eroding machine in the sense of a normalization of the process.

REFERENCES:
patent: 3812317 (1974-05-01), De Bont et al.
patent: 3816692 (1974-06-01), Ratmansky
patent: 3857011 (1973-09-01), Saito et al.
patent: 4504722 (1985-03-01), Kishi et al.
patent: 4695696 (1987-09-01), Ozaki et al.
patent: 4700038 (1987-10-01), Dauw
Weck, "Aufbau des Gesamtregelsystems und Auslegung der Teilkreise", Report No. 175-5/80, Lehrstuhl fuer Werkzeugmaschinen at the TH Aachen, Mar. 19, 1981.

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