DEVICE FOR ELECTRIC SPARK MACHINING OF SURFACES Russian patent published in 2015 - IPC B23H1/02 B23H9/00 

FIELD: electricity.

SUBSTANCE: device comprises surge-current generator with its positive pole connected to a tool electrode is connected and its negative pole connected to a machined part, two inductance coil with one coil forming a shunting path in interelectrode gap formed by the tool electrode and surface of a machined part, the coil is connected by its first output to the tool electrode and by its second output to a machined part through a diode. At that the device is equipped with control unit for self-inductance current of reverse polarity in interelectrode gap comprising direct-current supply source with adjusted current intensity, to which poles the second inductance coil is connected; this coil is placed at the same magnet core with inductance coil of the shunting path, and its form a saturable core reactor with the latter.

EFFECT: invention allows increase in coating thickness at reduced height of the coating microroughness.

1 dwg