Electro-discharge milling method for micro-three-dimensional structure

Abstract

The invention belongs to the technical field of the aerospace special processing and particularly relates to an electro-discharge milling method for a micro-three-dimensional structure. According to the method, for a hexagonal-narrow-channel part of the micro-three-dimensional structure in a aerospace generator, according to the layered milling strategy for the micro-three-dimensional structure, the N-layer movement trajectory of electrodes is defined as one cycle, and material removal is conducted on the electrodes from top to bottom layer by layer; the forward-reverse milling forward-reverse alternate milling manner is adopted in a single layer; and a compensation manner based on a contact sensing method is adopted for compensation of an electrode loss. The precision of the size of a sample machined through the method meets the design index requirement, the capability of industrial production is achieved, and preparation of narrow-channel products of the micro-three-dimensional structure is achieved for the enterprises. The method makes the manufacturing level of electro-discharge milling reach a new level, and a technical foundation is laid for future developmentof more complex micro-three-dimensional structure parts made of difficult-to-machine materials.

Description

technical field [0001] The invention belongs to the technical field of aerospace special processing, and in particular relates to a micro three-dimensional structure electric spark milling processing method. Background technique [0002] At present, with the rapid development of aerospace technology, some precision and miniaturized parts are more used in space vehicles. Some key structures of space offensive and defensive weapon engine products adopt complex fine three-dimensional structures, and their core components are mostly difficult-to-machine materials such as high-temperature alloys or titanium alloys, which are hard, brittle, and sticky. Moreover, these products have complex cavity structures, mostly deep and narrow grooves, which cannot be realized by conventional manufacturing methods due to the miniaturization of the surface size. With the development of EDM technology, milling by EDM method has become an effective method for making such tiny three-dimensional s...

AI Technical Summary

Problems solved by technology

At present, the domestic known process methods can only complete the contour shape of the micro three-dimensional structure product, but the processing accuracy of the product cannot meet the design requirements, the product efficiency is low, the electrode loss is serious, and the processing quality of the product surface is poor.

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