MANUFACTURING DEVICE FOR ELECTROMACHINING ELECTRODES USED IN THE FABRICATION OF SMALL-MODULE GEARS FORGING DIES

The utility model discloses a manufacturing device for electromachining electrodes used in the fabrication of small-module gears forging dies, belonging to the technical field of special machining. Small-module plastic gears used in quartz clocks, radio-receiver recorders, cameras, and other products have the requirements of higher accuracy and surface rough degree, and the tooth-shaped curves are not a single involute, so the manufacture of the small-module plastic gears is difficult. China needs to spend a large quantity of exchanges to import the moulds or fabricated parts every year. The manufacturing device realize a liquid stream jet type electroforming mode; the surfaces of the samples of gears are not processed in electric conduction; electroforming layers start to cathode surfaces and deposit along the side walls of plastic gears. The utility model eliminates a traditional mode that the samples of the gears are processed in the electric conduction first, and then are submerged in electroforming liquid to electroform. Thus, the utility model can manufactured the electrical spark electrode of good quality without cusp defect, and the electrical spark electrode can be used for actual production; the deposition rate of the electrical spark electrode is fast; the electric current density can raise 6 to 11 times.