Tool cathode provided with variable inner cavity and used for carrying out electrolytic machining on integrated blade disc with large-distortion blades

Abstract

The invention discloses a tool cathode provided with a variable inner cavity and used for carrying out electrolytic machining on an integrated blade disc with large-distortion blades, and belongs to the technical field of electrolytic machining for integrated blade discs. The tool cathode provided with the variable inner cavity and used for carrying out electrolytic machining on the integrated blade disc with the large-distortion blades is characterized in that a cathode structure is as follows: a blade bottom section shape is combined by a plurality of connection rods, telescopic connection rods are arranged at a part of sections, and installed in a cathode housing, and the cathode housing is fixed to a cathode fixture; and a plurality of rotary bases are arranged at the two sides of thecathode fixture separately, an electric push rod is installed on each base, and probes at the tail ends of the electric push rods are arranged at the junctions of the cathode connection rods. During machining, a fixture drive shaft drives the cathode fixture, the cathode housing and the inner cathode connection rods to carry out synchronous rotary feeding, and the electric push rods drive the cathode connection rods to move to realize the change of the shape of the inner cavity of the cathode during feeding. The tool cathode provided with the variable inner cavity and used for carrying out electrolytic machining on the integrated blade disc with the large-distortion blades solves the problem that the large-distortion and variable-section blades of the integrated blade disc are difficultlymachined by traditional jacking electrolytic machining, radial forming electrolytic machining and numerically-controlled generation electrolytic machining.

Description

technical field [0001] The patent of the present invention relates to a cathode device structural design for electrolytic machining of variable cross-section and large twisted integral blisk blades, and belongs to the technical field of integral blisk electrolytic machining. Background technique [0002] Aerospace technology has now become one of the important indicators to measure a country's scientific and technological level and comprehensive national strength. The blisk is the core component of an aero-engine, and its high-efficiency and high-quality manufacturing methods have also become the key to the development of aero-engines. technology. With the continuous improvement of the thrust of aero-engines, the material of the blisk is also constantly transitioning to the direction of high strength, high hardness, and high temperature resistance such as titanium alloy, making the processing of the blisk a major problem in the manufacturing industry. Compared with traditio...

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Problems solved by technology

Nesting electrolytic machining can only process blisk blades with equal cross-sections; radial forming electrolytic machining belongs to the pre-processing of the cascade channel, and the movement mode of the cathode is a single radial feed or spiral feed, which is suitable for blades with a large degree of distortion. The whole blisk will cause the problem of uneven distribution of blade finishing allowance, or even the problem that it cannot be processed; the movement track of the cathode of the numerical control generated electrolytic machining tool is a straight-grained developable surface, and it is impossible to process the blisk blade with twisted and complex shapes

Aiming at the problem that the existing electrolytic machining technology is difficult to process the blisk with large twist and variable cross-section, it is imperative to study a new cathode device and method for electrolytic machining

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