Air bag forming method of composite material part with T-shaped reinforced web structure

Abstract

The invention provides an air bag forming method of a composite material part with a T-shaped reinforced web structure. The method comprises the steps of mounting a metal frame part in an air bag forming mold, laying up an air bag tooling on the surface of a cavity formed by the metal frame part and the air bag forming mold, sealing the outer layer of the air bag forming mold by a vacuum bag in a vacuum manner, forming the air bag tooling in an autoclave, and obtaining the composite material part with the T-shaped reinforced web structure by use of the molded air bag tooling. According to the method, pressure applied to the autoclave can be uniformly and accurately transferred, the thickness tolerance phenomenon during manufacturing of the composite material can be avoided, and the thermal lag effect of the T-shaped rib part can be avoided, therefore, the forming quality of a product can be effectively ensured, the qualified rate and the production efficiency are improved, the molded surface of the product has high quality, and the production cost and the manufacturing cycle can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of advanced composite material manufacturing, in particular to an airbag forming method for a T-shaped reinforced web structure composite material part. Background technique [0002] Resin-based carbon fiber composite materials have superior properties such as specific strength and specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, and good dimensional stability. They are currently widely used in aviation, aerospace, transportation and other fields. High-performance structural materials. Among various carbon fiber composite molding processes, the autoclave process has uniform molding temperature and pressure, and has good adaptability to parts of different materials, shapes, sizes and structures. One of the main process methods of material components. [0003] With the increasing requirements for the strength and stiffness of composite parts, the structure of ...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of using the mandrel mainly include the following three aspects: (1) Since the mandrel itself has a certain rigidity, it is difficult to achieve uniform and accurate conduction of external pressure through the mandrel, and it is easy to cause the thickness of the T-shaped rib part of the workpiece to be out of tolerance; ( 2) Since the core mold has a certain thickness, according to the heat conduction effect, the temperature rise rate of the T-shaped rib part of the part will lag behind other parts, thus affecting the internal molding quality of the part; (3) Since the core mold is made of metal, it has a large weight , very inconvenient to operate

At the same time, the manufacturing and maintenance costs of the metal mandrel are relatively high, and the manufacturing cycle for repair or reprocessing is relatively long

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