Electrolytic machining method of difficult-to-cut material, fine-module internal gear and device

Abstract

The invention discloses an electrolytic machining method of a difficult-to-cut material, a fine-module internal gear and a device. The method comprises the following steps that a tool cathode with a top-bottom different shape structure is adopted; the surface of the small end of the tool cathode is circular, and a gap between the tool cathode and a work piece pre-hole is served as an initial machining gap which can ensure that a flow field is stable; the large end of the tool cathode is served as a cathode tooth; a part from the small end to the large end of the tool cathode is smoothly transited to a cathode tooth shape from a circular; a forward flow and backpressure electrolyte flowing mode is adopted; and electrolyte flows into a hollow channel of a cathode system, further an organic glass cavity with organic pieces is filled with the electrolyte, and then the electrolyte flows out off the gap between the tool cathode and the work piece. The tool cathode adopts a top-bottom different shape structure, can realize three-dimensional feeding, a pre-hole is arranged in a work piece blank, so that a feeding speed of the tool cathode is improved by 5 to 10 times relative to the feeding speed of an end surface during electrolytic machining, a machining process is stable, and the method is beneficial to improvement of machining efficiency and forming accuracy.

Description

technical field [0001] The invention relates to an electrolytic machining method and device for difficult-to-cut materials and small-modulus internal gears, and belongs to the technical field of electrolytic machining. Background technique [0002] Internal gears are important connecting components in modern mechanical equipment, and are widely used in engineering fields such as machining, transportation, aerospace, chemical industry, and metallurgy, such as automotive gearboxes, planetary gear trains, machine tool transmissions, and superchargers. The processing accuracy, quality and efficiency of the internal gear also directly affect the working performance, service life and manufacturing cost of the machine. [0003] In the traditional process, the processing of internal gears is usually arranged after heat treatment as the final processing, and the workpiece after heat treatment has higher hardness and higher strength. If the broaching process is used for processing, t...

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Problems solved by technology

However, electrolytic machining itself also has some shortcomings, such as the design of the stable flow field is relatively complicated; the change law of the electric field between the tool cathode and the workpiece during the forming process is relatively complicated; although the design of the cathode is relatively difficult and the design cycle is long, once the trial production is successful , under normal conditions, the cathode can be used permanently

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