Verfahren zur elektroerosiven Metallbearbeitung und Einrichtung zur Durchfuehrung dieses Verfahrens

摘要

A method and device for effecting electroerosion machining comprises a high-frequency source of pulses of a relatively low amplitude of current and a low-frequency source of pulses of a relatively high amplitude of current controlled by circuits for automatically switching over said sources in response to a decrease in the interelectrode gap value and for switching them back after a predetermined period of time. Alternatively a source of variable frequency of pulses of electric energy with a high amplitude of voltage may be employed with a pulse step-down transformer and circuits for automatic decrease of the frequency of the source and its direct connection with the electrodes for a predetermined period of time in response to a decrease in the interelectrode gap value, there being provided control elements for disconnecting the windings of the transformer and directly connecting the high-voltage source with the electrodes, and for restoration of the circuits after a predetermined period of time.