Liquid expansion forming method for aero-engine flow guide pipe

Through the combination of liquid swelling forming method and primary forming and shaping molds, the problems of high processing cost and low forming accuracy of the flow tube are solved, and efficient and accurate flow tube forming is achieved, reducing processing costs and pollution.

CN119681103AActive Publication Date: 2025-03-25GUIZHOU HUAQINGYUAN PRECISION MANUFACTURING CO LTD
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Patent Information

Application Number
CN202411980696.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-03-25
Estimated Expiration
2044-12-31

AI Technical Summary

Technical Problem

In the prior art, the diversion pipe processing method has the problem of high processing costs. The traditional thermoforming method has a high waste rate and the fatigue limit of the diversion pipe in a high temperature environment, resulting in a short working life of the aero engine.

Method used

By using the liquid swelling forming method, by injecting liquid into the blank and molding with a primary molding and setting mold, the pressure of the liquid in the blank is equal to the compressive strength of the blank to ensure molding accuracy and quality.

Benefits of technology

It reduces the processing cost of the flow pipe, improves the yield and molding accuracy, reduces the use and pollution of heavy metals, and avoids the problems of cracking and inconsistent wall thickness of parts.

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Abstract

The invention relates to the technical field of aero-engine accessory machining equipment, in particular to a liquid expansion forming method for a flow guide pipe of an aero-engine. According to the liquid expansion forming method for the aero-engine flow guide pipe, the technical problem that in the prior art, a flow guide pipe machining method is high in machining cost is solved. A liquid expansion forming method for an aero-engine flow guide pipe comprises the following steps that a blank is manufactured, liquid is adopted for replacing tin, lead and other modes in the prior art for forming, the number of steps of processes is reduced, and efficiency is greatly improved. Compared with the mode of filling by adopting tin, lead and the like, metal such as tin, lead and the like is different from the material of the blank, so that the forming precision of the flow guide pipe cannot be effectively ensured even if tin and lead are filled. Liquid filling is adopted, the compression ratio of the liquid is small, and particularly the compression ratio of hydraulic oil, cutting fluid and the like can be neglected, so that the pressure of the liquid in the blank can be effectively kept, and the forming precision of the flow guide pipe is improved.
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