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Manufacturing method and fixture of integral bladed-disk wax mold

A technology of integral blisks and manufacturing methods, which is applied in the direction of casting and molding equipment, can solve the problems of unguaranteed dimensional accuracy of disc rings, high precision requirements, and difficult processing, so as to avoid rework or even scrapping, improve dimensional accuracy, and reduce production cost effect

Active Publication Date: 2012-02-29
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies existing in the prior art, such as complex molds, high precision requirements, difficult processing; or the dimensional accuracy of the disc ring cannot be guaranteed, the present invention proposes a Wax mold manufacturing method and jig for integral blisk

Method used

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  • Manufacturing method and fixture of integral bladed-disk wax mold
  • Manufacturing method and fixture of integral bladed-disk wax mold
  • Manufacturing method and fixture of integral bladed-disk wax mold

Examples

Experimental program
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Effect test

Embodiment 1

[0040] This embodiment is a method of using MPI55-50 wax press machine to manufacture the overall wax mold of a turbine rotor blisk. The number of single-blade wax molds produced is consistent with the number of turbine disk blades. In this embodiment, the turbine disk The number of blades was 43. Its specific process includes the following steps:

[0041] Step 1, pressing the single blade wax model. The mold is placed on the wax press machine, and the temperature of the upper template and the lower template of the wax press machine is 35°C. The clamping pressure is 50bar. Pour the wax into the mold. After injecting pressure into the mold, keep the pressure for 10s, and the injection time is 20s to obtain a molded single blade. The wax material is F28. The injection temperature of the wax material is 70° C., and the injection pressure is 18 bar to obtain a molded single-blade wax mold. Repeat the above process to make 43 single-blade wax models in total. After the press...

Embodiment 2

[0047] This embodiment is a method of using MPI55-50 wax press machine to manufacture the overall wax mold of a turbine rotor blisk. The number of single-blade wax molds produced is consistent with the number of turbine disk blades. In this embodiment, the turbine disk The number of blades was 23. Its specific process includes the following steps:

[0048] Step 1, pressing the single blade wax model. The mold is placed on the wax press machine, and the temperature of the upper template and the lower template of the wax press machine is 40°C. The clamping pressure is 40bar. Pour the wax into the mold. After injecting pressure into the mold, keep the pressure for 8s, and the injection time is 15s to obtain a molded single blade. The wax material is F28. The injection temperature of the wax material is 68° C., and the injection pressure is 15 bar to obtain a molded single-blade wax mold. Repeat the above process to make 23 single-blade wax models in total. After the presse...

Embodiment 3

[0054] This embodiment is a method of using MPI55-50 wax press machine to manufacture the overall wax mold of a turbine rotor blisk. The number of single-blade wax molds produced is consistent with the number of turbine disk blades. In this embodiment, the turbine disk The number of blades was 31. Its specific process includes the following steps:

[0055] Step 1, pressing the single blade wax model. The mold is placed on the wax press machine, and the temperature of the upper template and the lower template of the wax press machine is 38°C. The clamping pressure is 45bar. Pour the wax into the mold. After injecting pressure into the mold, keep the pressure for 9s, and the injection time is 18s to obtain a molded single blade. The wax material is F28. The injection temperature of the wax material is 75° C., and the injection pressure is 16 bar to obtain a molded single-blade wax mold. Repeat the above process to make 31 single-blade wax models in total. After the presse...

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Abstract

The invention discloses a manufacturing method and a fixture of an integral bladed-disk wax mold. According to the invention, an integral bladed-disk wax pattern is divided into single blades and a disk shaft. Processes of separated pressing, precise fixture positioning and wax mold welding assembling are adopted. The integral wax pattern is precisely cast. According to the invention, the disk shaft is fixed on an assembling fixture; the blades are sequentially positioned on positioning points on the fixture, and are welded onto the disk shaft. Blade bodies and channel inner walls with high precisions are adopted in the positioning of the blades, such that good consistency is provided for the blades. When the wax pattern is assembled, positioning points are positioned on the blade bodies;blade body positioning points are consistent with processing positioning points, primary standards of cold and hot processing are consistent, such that blade dimensional precision of the whole cast is optimally improved, throat areas between blades are ensured, and flow rate homogeneity is ensured. Positioning parts of the fixture can be adjusted according to measured dimensions of parts, such that the volume of flow rate can be changed according to directional positions of angles of the blades. Therefore, repairing or even rejecting risks caused by unqualified integral mold dimensions are avoided, production period is saved, and production cost is reduced. With the method provided by the invention, hard processes are turned easy, product precision is improved, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the precision casting technology, and relates to the manufacture of wax patterns of entire castings for aviation, spaceflight turbofan and turbojet engine turbine disc investment casting, and in particular to the split combination manufacture of the whole wax pattern. Background technique [0002] At present, the whole casting of turbine disk investment casting generally adopts integral wax casting, wax casting combined with carbonic core casting, and the casting process of these two methods is extremely difficult. [0003] The diameter of blisk parts ranges from Φ150mm to 500mm, the number of blades ranges from more than 20 to nearly a hundred, and the blades have different degrees of bending and twisting. When integral casting is adopted, there are many difficulties in mold design, difficult processing, many loose blocks, many cores, easy misalignment of module positioning and large accumulation errors, and it is difficult to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/02
Inventor 董茵常涛岐张凌峰贺剑童小峰
Owner AECC AVIATION POWER CO LTD
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