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Single-crystal hollow blade electric spark electrolysis composite hole manufacturing method

A hollow blade and electric spark technology, which is applied in the field of electric spark electrolysis composite hole making, can solve the problems of insufficient, the qualified rate of electric spark electrolysis compound hole making is less than 1%, and the remelting layer cannot be completely removed, etc., so as to improve the qualified rate effect

Active Publication Date: 2015-09-23
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the inlet end of the gas film hole, due to the presence of sufficient electrolyte on the inner wall of the hole, the removal effect of the remelting layer is good; but at the outlet end of the gas film hole, there is not enough electrolyte on the inner wall of the hole, and the remelting layer cannot be completely removed. Problems, so that the qualified rate of EDM electrolytic composite hole making is less than 1%

Method used

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  • Single-crystal hollow blade electric spark electrolysis composite hole manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1, a certain type of engine single crystal hollow blade, material DD5, in the process of using electric spark-electrolysis to make gas film holes, the method of removing the remelting layer by this method is as follows:

[0041] 1. Filling filling:

[0042] 1.1. Prepare filler: the filler is composed of filler and binder, the weight of filler accounts for 25% of the weight of the filler, and the balance is binder; the filler is mixed with methyl methacrylate powder and butyl acrylate powder Composition, the weight of methyl methacrylate powder accounts for 40% of filler weight, the particle size of methyl methacrylate powder and butyl acrylate powder is 60 orders; Binder is made of methyl methacrylate and dimethacrylic acid Ethylene glycol mixed composition, the weight of ethylene glycol dimethacrylate accounts for 1% of the weight of the binder, and the balance is methyl methacrylate; the preparation steps of the filler are: first prepare the filler and the bin...

Embodiment 2

[0056] Example 2, the single crystal hollow blade of a certain type of engine, the material DD99, after the air film hole is machined by EDM, the method of removing the remelted layer by this method is as follows:

[0057] 1. Filling filling:

[0058] 1.1. Filling preparation: The filling is composed of a mixture of filler and binder, the weight of the filler accounts for 30% of the weight of the filling, and the balance is binder; the filler is mixed with methyl methacrylate powder and butyl acrylate powder Composition, the weight of methyl methacrylate powder accounts for 50% of filler weight, the particle size of methyl methacrylate powder and butyl acrylate powder is 70 orders; Binder is made of methyl methacrylate and dimethacrylic acid Ethylene glycol mixed composition, the weight of ethylene glycol dimethacrylate accounts for 2% of the weight of the binder, and the balance is methyl methacrylate; the preparation steps of the filler are: first prepare the filler and the ...

Embodiment 3

[0072] Example 3, a certain type of engine single crystal hollow blade, material DD6, after the air film hole is machined by EDM, the method of removing the remelted layer by this method is as follows:

[0073] 1. Filling filling:

[0074] 1.1. Filling preparation: The filling is composed of a mixture of filler and binder, the weight of the filler accounts for 35% of the weight of the filling, and the balance is binder; the filler is mixed with methyl methacrylate powder and butyl acrylate powder Composition, the weight of methyl methacrylate powder accounts for 60% of filler weight, the particle size of methyl methacrylate powder and butyl acrylate powder is 80 orders; Binder is made of methyl methacrylate and dimethacrylic acid Ethylene glycol mixed composition, the weight of ethylene glycol dimethacrylate accounts for 3% of binder weight, and the balance is methyl methacrylate; The preparation steps of filler are: first prepare filler and binder respectively, then Weigh th...

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Abstract

The invention belongs to the technology of electric spark electrolysis composite hole manufacturing, and relates to the improvement in an electric spark electrolysis composite hole manufacturing method. The method is characterized by including the following hole manufacturing steps of filler filling, electric spark-electrolysis composite hole manufacturing and filler removing. The invention provides the improved electric spark electrolysis composite hole manufacturing method, a remelting layer at the outlet end of an air film hole is thoroughly removed, and the pass percent of single-crystal hollow blade electric spark electrolysis composite manufactured holes is increased.

Description

technical field [0001] The invention belongs to the electric spark electrolysis compound hole making technology, and relates to the improvement of the electric spark electrolysis compound hole making method. Background technique [0002] With the rapid development of advanced engines, the demand for single crystal hollow blades is increasing. High-efficiency cooling single-crystal hollow blades generally need to process hundreds of air film holes, figure 1 It is a schematic diagram of the structure of a certain type of aero-engine turbine blade. In the figure, 1a is the upper port of the single crystal hollow blade, 1b is the lower port of the single crystal hollow blade, and 2 is the gas film hole of the single crystal hollow blade. The air film hole processing of single crystal hollow blades at home and abroad is generally processed by electro-hydraulic beam. The electro-hydraulic beam hole making technology is one of the key manufacturing technologies of the new generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H9/14B23H5/02
CPCB23H5/02B23H9/14
Inventor 柳万珠梁养民彭颖王琦强美宁王颖谢国印陈娟娟
Owner AECC AVIATION POWER CO LTD