External pressure resistance composite material cylinder body and metal end socket co-curing connecting structure and manufacturing method thereof

Abstract

The invention relates to an external pressure resistance composite material cylinder body and metal end socket co-curing connecting structure and a manufacturing method of the external pressure resistance composite material cylinder body and metal end socket co-curing connecting structure. The connecting structure comprises two metal flanges. Each metal flange is provided with a base and a first connecting segment. The two bases are fixedly connected with two metal end sockets correspondingly. The free end of the first connecting segment of each metal flange is provided with a 27-degree taper angle. The two ends of a composite material cylinder body are correspondingly provided with second connecting segments matched with the taper angles of the two metal flanges. The inner diameter of each metal flange is equivalent to the inner diameter of the composite material cylinder body. The external pressure resistance composite material cylinder body and metal end socket co-curing connecting structure overcomes the existing technical defect that the assembly and connecting effects of external pressure resistance composite materials and metal end sockets is poor, and the metal flanges with the 27-degree taper angles and the composite material cylinder body are wound, co-cured and formed to be mechanically connected with the metal end sockets after demoulding. Accordingly, the connecting structure can guarantee the connecting strength and airtightness of the composite material cylinder body and metal end socket cylinder bodies.

Description

technical field [0001] The invention relates to a co-cured joint structure of an anti-external pressure composite material cylinder body and a metal sealing head and a manufacturing method thereof. Background technique [0002] Composite materials have the characteristics of high specific stiffness, high specific strength, and designability, and are widely used in aviation, aerospace and deep-sea engineering. However, due to the limitations of winding technology, most composite material anti-external pressure shells are not all composite materials, but use easy-to-process metal heads to connect and cooperate with winding composite material cylinders, which brings Solved the technical problems about the connection between the composite material cylinder and the metal head. In addition, for the anti-external pressure shell, the key considerations are the anti-leakage and anti-stabilization capabilities of its components, and the connection between the composite material cylin...

AI Technical Summary

Problems solved by technology

[0003] The traditional connection method adopts step-type adhesive connection or screw and cement blended connection. The stress form of the step-type cemented connection is simple. Under the external pressure load, there is always a shear force parallel to the bonding surface, and the bonding strength is limited. The phenomenon of degumming of the connection part often occurs; if the shell section is connected by a blend of screws and cement, it is necessary to open holes in the composite material shell. Concentration phenomenon, originally the connection part is the weakest area of ​​the whole component, this connection method is easy to aggravate the damage of the connection part; in addition, due to the flexibility of the composite material barrel and the limitation of post-processing technology, if the formed composite material is used The inner surface of the cylinder body directly matches the outer surface of the metal head, which may lead to poor coordination of the connection parts

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