Hollow blade profile shape optimization machining device and machining method

By using a hollow blade shape optimization processing device in the production process of hollow blades, wax liquid is prefilled and wax molded to press, the surface deformation problem caused by wax solidification is solved, and the shape integrity and wall thickness control effect of the blade are improved.

CN119702952AActive Publication Date: 2025-03-28CHINA HANGFA SOUTH IND CO LTD
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Patent Information

Application Number
CN202411668087.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-21
Publication Date
2025-03-28
Estimated Expiration
2044-11-21

AI Technical Summary

Technical Problem

During the production process of hollow blades, the volume reduction of the wax material during solidification leads to local deformation of the wax mold surface, affecting shape integrity and wall thickness control.

Method used

A hollow blade shape optimization processing device is used to prefil the wax liquid into the gap of the core, and then wax mold is pressed to avoid surface deformation caused by the shrinkage of the wax material. The device includes a heating box, a stirring heating assembly, a wax injection tube and a motor. The wax block is melted and heated evenly through the stirring heating assembly to improve the melting efficiency of the wax liquid.

Benefits of technology

It effectively avoids local deformation of the wax mold surface, improves the blade appearance integrity and wall thickness control effect, and reduces the filling pressure of the wax material, improves the strength of the core and the filling ability of the wax mold.

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Abstract

The invention discloses a hollow blade profile shape optimization machining device and method, and belongs to the technical field of precision casting of aero-engine parts. The method comprises the following steps that a proper amount of filling wax is weighed and placed in a heating container; a heating switch is turned on, and in order to prevent the filling wax from being heated violently, the heating power is controlled to be about 30 min to melt the wax material; measuring the temperature of the filling wax, and controlling the temperature within the range of 1.1-1.2 times of the melting point temperature; a small metal spoon with a pit is used for scooping a small amount of liquid to fill and fill the gap of the mold core, and the liquid filling wax is solidified within 5-10 s; the operation is repeated to fill the specified gap of the mold core; and finally, the redundant filling wax material is scraped off through a scraper, and it is ensured that the filling wax and the surface of the mold core are in smooth transition. Wax liquid is poured into the gaps of the mold core in advance, then wax mold pressing is carried out, and local deformation of the mold surface of the wax mold can be effectively avoided.
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