Molding method for composite material structural member with I-shaped section

Abstract

The invention discloses a molding method for a composite material structural member with an I-shaped section. The composite material structural member is molded by taking a metal fake member and a molding mould to mould a glass fiber enhanced silicone rubber airbag and taking the airbag as a core mould to be combined with the molding mould. The molding method has the advantages that with the adoption of a silicone rubber airbag molded structural member, firstly, the wall of the airbag is thin, the heat transferring performance is good, the temperature gradient of the structural member and the edge is small, and the inner quality of the molded structural member is guaranteed; secondly, silicone rubber on the surface of the airbag is elastic so as to have the effect of a pressure equalizing cushion; the surface quality of a molded part is good; thirdly, the silicone rubber airbag is combined with a box-shaped structure of the airbag; meanwhile, the two ends of the I-shaped structural member are connected by the silicone rubber, the structural rigidity of the airbag is great and the molding position and the size precision of a web are guaranteed; fourthly, the airbag can be used repeatedly and can be manufactured conveniently again so that the production cost is reduced effectively; the whole molding method can uniformly apply a pressure to the web and an edge strip of the structural member and the pressure is equal to a tank pressure.

Description

technical field [0001] The invention relates to a forming method of a workpiece, in particular to a forming method of an I-shaped section composite material structure. Background technique [0002] Advanced resin-based composite material is a high-performance composite material developed to meet the needs of high-tech fields such as aviation and aerospace. It has high specific strength, high specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, Good dimensional stability and other superior performance. Among them, the autoclave process has the advantages of uniform temperature and pressure, good adaptability to parts of different materials, shapes, sizes and structures, and good shape and size stability. It has become a research and manufacture of aerospace high-quality composite structural parts. One of the main process methods. [0003] The molding process of advanced resin matrix composite structural parts consists of three ba...

AI Technical Summary

Problems solved by technology

The former can be bonded according to structures of different sizes, but due to the use of sealing strips, it is difficult to ensure the internal sealing when it is applied to a closed structure; the latter has a fixed perimeter once formed, and is suitable for forming I-beam boxes section, there are limitations in the shape and size of the I-shaped long truss and the variable-section I-beam

In addition, limited by the characteristics of the vacuum bag itself, if the inner surface of the I-beam flange and the surface of the web have higher precision requirements, it is difficult to meet the requirements with a tubular vacuum bag

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