Electromachining method with controllable tool electrode rotating speed for micro-holes and speed adjustment system

Abstract

The invention provides an electromachining method with controllable tool electrode rotating speed for micro-holes and a speed adjustment system, and belongs to the technical field of non-traditional machining. According to the electromachining method, neutral salt solution with the extremely low concentration serves as electrolyte, corresponding voltages are applied to two poles of the electrolyte, the gas film covering status of the surface of a tool electrode is adjusted through control over the tool electrode rotating speed, and if the tool electrode rotating speed is high, discharging reaction occurs when the gas film covering status meets the generation condition of the discharging reaction; if the tool electrode rotating speed is low, electrochemical reaction occurs; and controllable compounding of electrochemical machining and discharging machining is achieved through control over the tool electrode rotating speed. According to the electromachining method with the controllable tool electrode rotating speed for the micro-holes and the speed adjustment system, good surface machining quality and machining consistency can be achieved.

Description

technical field [0001] The invention relates to an electric machining method and a speed regulating system with controllable rotational speed of a micro-hole tool electrode, belonging to the technical field of special processing. Background technique [0002] With the recent rapid development of industry, the processing methods for various high-performance and complex parts are getting higher and higher, especially in the processing methods of micro-cooling holes, air film holes and precision mold micro-holes of aero-engine turbine blades. As follows: ①Meet the required processing size, surface quality, shape accuracy and other requirements; ②Meet the processing requirements of complex, high-strength, high-performance and difficult-to-machine materials; ③Meet the processing requirements of small holes with relatively large depth and diameter. At present, the processing methods of micro holes mainly include mechanical drilling, laser drilling, electric discharge machining and...

AI Technical Summary

Problems solved by technology

[0003] On June 11, 2014, the Chinese patent with the publication number CN103846640A disclosed a plasma discharge machining device and processing method for tiny holes. It is a non-contact processing method, which avoids damage to the surface and subsurface of the processing area, and improves the processing quality of micro holes. However, this processing device has high requirements on the processing environment, it is difficult to process micro holes with relatively large depth and diameter, and the processing cost is high.

This invention overcomes various disadvantages brought by the single special processing method in the past, but this method has high processing cost and increases the cumulative processing error when processing the micro-hole of the countersunk head

[0005] On September 3, 2014, the Chinese patent with the publication number CN104014880A disclosed a laser-electrolytic composite processing device and method without micro-holes in the recast layer. The composite processing of laser-electrolytic processing, this processing method has high efficiency and no recasting layer, etc., but the laser has attenuation, and the electrolyte has an interference effect on the laser, which affects the dimensional accuracy of micro-hole processing

This invention realizes the controllable combination of EDM and ECM through the optimization of the vibration mode, but this method increases the machining stroke for the reciprocating vibration machining of the electrode and reduces the machining efficiency. At the same time, the stability of the reciprocating vibration of the tool electrode directly affects the machining of micro holes the quality of

Images