Pre-punching, draining and chip discharging method for electrical discharge machining of enclosed integral blade disc

A technology of integral blisk and electric discharge, applied in the field of electric discharge machining, can solve problems such as unstable discharge state, low processing efficiency of closed integral blisk, and poor discharge of discharge erosion products, so as to improve processing efficiency and achieve highly operable effect
CN108856920AActive Publication Date: 2018-11-23上海交通大学深圳研究院 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
上海交通大学深圳研究院
Publication Date
2018-11-23

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Abstract

A pre-punching, draining and chip discharging method for electrical discharge machining of an enclosed integral blade disc comprises: designing a pre-punching parameter combination according to a geometric model of the enclosed integral blade disc, providing an enclosed integrated blade disc blank with pre-punched holes for drainage, using a multi-shaft linkage electrical discharge machine to perform electrical discharge machining on each passage in the enclosed integrated blade disc blank having the pre-punched holes, and extracting a working liquid with electro-corrosion products, generatedin machining, through the pre-punched holes from the side opposite to a tool electrode during passage machining, so that the working liquid in the discharge machining area is renewed; machining efficiency of the enclosed integral blade disc is evidently improved. The method herein has the advantages that electro-corrosion products from electrical discharge machining of an enclosed integral blade disc can be effectively discharged, and machining efficiency of the enclosed integral blade disc is improved.
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Description

technical field

[0001] The invention relates to the technical field of electric discharge machining, in particular to a method for discharging discharge erosion products during the electric discharge machining process of a closed integral blisk. Background technique

[0002] The closed integral blisk has the advantages of high working efficiency and high reliability, and is more and more widely used in liquid rocket engines and aeroengines. However, the flow channel of the closed blisk is a semi-closed structure, and the blade surface is curved and twisted. In addition, the closed blisk is processed from a blank of a difficult-to-cut material, and its manufacture is very difficult.

[0003] At present, both at home and abroad, multi-axis linkage EDM is regarded as the preferred method for closed blisk machining. At this stage, there are relatively mature methods to design the tool electrode of multi-axis linkage EDM and plan its feed trajectory, so as to realize the machina...

Claims

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