A cavity structure and its preparation method

A cavity and cavity preparation technology, applied in the field of composite materials, can solve the problems of low reliability and difficult manufacturing, and achieve the effects of good adaptability, simple molding tooling, and reduced manufacturing difficulty
CN109334045BActive Publication Date: 2020-11-13AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
Publication Date
2020-11-13

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Abstract

The invention relates to a cavity structure and a preparation method for the same. The method comprises the steps that a drive carrier with a geometrical similarity is provided; corresponding controlnodes are disposed on a formed fixture and the drive carrier respectively; a composite reinforced fabric is paved and fixed on the drive carrier to form a prefabricated body; the prefabricated body isadhered on the formed fixture by a fluid drive medium; and a liquid state matrix is injected and solidified, so the cavity structure can be obtained. The invention also provides the cavity structuremade with the method. The method provided by the invention is extensively applicable and especially applicable to complicated thin-wall cavity structures with abrupt cross-section changes and great changes of main axis curvatures of cavities; problems in traditional technologies such as difficulty in paving and demoulding can be solved; the formed fixture is simple and does not have many requirements for equipment, and the duration is short; and the fabricated cavity structure has a good appearance and high accuracy, is free of layering and loosening and is highly overall and reliable.
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Description

technical field

[0001] The invention relates to a cavity structure and a preparation method thereof, in particular to a composite material special-shaped variable-section thin-wall cavity and an integral molding preparation method thereof, belonging to the technical field of composite materials. Background technique

[0002] Considering functional factors such as structural electromagnetic wave stealth performance and aerodynamic performance, both the stealth drone and the stealth aircraft air intake adopt a thin-walled hollow structure with complex curved surface features. By increasing the complexity of the structure shape, it meets Requirements for low RCS and low drag coefficient indicators, such as the snake-shaped inlet of the "Sharp Sword" stealth drone and the general-purpose stealth subsonic cruise missile. The complexity of the shape features and the particularity of the thin-walled hollow structure make it difficult to realize the manufacturing of such structures ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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