A method for laying and pasting composite material cylindrical parts
A molding method and composite material technology, applied in the field of composite material molding, can solve problems such as the inability to guarantee the quality of the outer surface of the cylindrical structure, the difficulty in ensuring the fit and matching, and the difficulty in ensuring the quality of the molding, so as to avoid layer wrinkles and frame Bridge, good molding quality and easy demoulding
Active Publication Date: 2017-04-05
CHANGHE AIRCRAFT INDUSTRIES CORPORATION
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Problems solved by technology
To realize the lay-up process of this structure, the male mold is usually used, that is, all the laminates are wrapped on the outside of the male mold and pressurized by an external vacuum bag, but this process method cannot guarantee the outer surface quality of the cylindrical structure
Another solution is to complete all the layers on the mandrel, and then transfer the layer to the female mold. In this method, it is difficult to ensure the fit and compatibility between the large-thickness prepreg and the female mold after layering. , it is easy to produce bridging or ply fold defects, in addition, the core mold is not easy to demould, and the molding quality is difficult to guarantee
Method used
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[0024] The present invention is characterized in that the core mold is combined with the forming mold, and the core mold is manufactured by shrinking the core mold to realize the alternate layering of the cylindrical composite parts with torsion angle, large thickness and narrow cavity, avoiding the traditional male mold paving The transfer method of transferring to the forming mold causes the mismatch between the layer and the shape of the forming mold, thereby effectively ensuring the quality of the outer surface. And it is convenient to demould, and the process is easy to implement.
[0025] Take concrete pavement as figure 2 Take the paving and forming of a cylindrical composite material with torsion angles, alternating large and thick layers, and narrow cavities as an example, the implementation steps are described in detail:
[0026] In the first step, a core mold is manufactured according to the inner surface of the sleeve. Such as image 3 , The core mold is 1-3mm smaller...
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The invention belongs to a composite moulding technology and in particular relates to a laying moulding method for a cylindrical composite part with a torsional angle, alternate large and thick laying layers and a narrow cavity. The laying moulding method for the cylindrical composite part comprises the following steps: according to inner and outer molded surfaces of the complex cylindrical component, designing and manufacturing a blocked core mould reduced in size and a moulding mould in an upper-lower mould form, and then alternately laying large and thick layers of the cylindrical part. The laying moulding method for the cylindrical composite part can be used for alternate complex large and thick layer laying as well as laying and moulding of a narrow-cavity cylindrical composite part, compatibility between the laying layers and appearance of the moulding mould can be effectively guaranteed, moulding quality of the outer surface of the part is guaranteed, demoulding is convenient, and technique implementation is good.
Description
Technical field [0001] The invention belongs to composite material molding technology, and particularly relates to a lay-up method for cylindrical composite material pieces with torsion angles, alternating large and thick layers and narrow cavities. Background technique [0002] The bearingless rotor sleeve is a cylindrical composite member with torsion angle, large wall thickness and narrow cavity shape. The internal opening size of the narrow end is about 174mm×75mm. The schematic diagram of the part structure is as follows figure 1 , The pavement diagram is as figure 2 . To realize the layup process of this structure, a male mold layup is usually used, that is, all the layup layers are wrapped on the outside of the male mold and molded by an external vacuum bag, but this process method cannot guarantee the outer surface quality of the cylindrical structure . Another solution is to complete all the plies on the core mold, and then transfer the plies to the female mold for for...
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IPC IPC(8): B29C70/38
Inventor 许漂余林贺强管海新汪开兵汪心文徐凌波李伟李锦
Owner CHANGHE AIRCRAFT INDUSTRIES CORPORATION