Molding method of double-curvature variable-section variable-thickness through beam

Abstract

The invention discloses a molding method of a double-curvature variable-section variable-thickness through beam. The molding method comprises the steps that a molding die is manufactured according to the structural form of the double-curvature variable-section variable-thickness through beam; the molding die comprises a combined female die body and a limiting strip, and the combined female die body comprises a detachable side check block and a fixed block; prepared hot-melting prepreg and hot-melting prepreg cloth are shorn to the size of an unfolded section laying layer of the through beam, a hot-melting prepreg cloth laying layer is firstly laid on the surface of the female die body, and then vacuumizing compaction is carried out; laying layers are stacked according to the thickness of the through beam and the designed laying layer sequence, hot-pressing shaping is carried out in the laying layering stacking process according to the thickness of the laying layers, and finally a composite material prepreg lamination is manufactured; then coating, curing and combined female die body removal are carried out to obtain a product. The aerodynamic configuration requirement can be effectively guaranteed, the problems that the laying layers and size precision of a large-size double-curvature variable-section variable-thickness through beam are hard to control are solved, and finally the overall quality and size precision requirements of the through beam are guaranteed.

Description

technical field [0001] The invention relates to a forming method of a double-curvature variable-section variable-thickness through-beam, which belongs to the technical field of resin-based composite material forming, and specifically relates to a carbon fiber-reinforced high-temperature-resistant epoxy resin-based composite material forming method. Background technique [0002] With the rapid development of aerospace structural composite materials and the further requirements of new models for structural weight reduction, high efficiency and integration, the molding technology of structural composite materials has become the focus. An important factor of product performance, quality and reliability, its performance and level have a very important impact on the development of aerospace technology and the development process of aerospace products, and are one of the important symbols to measure the development level of aerospace technology. With the further development of my c...

AI Technical Summary

Problems solved by technology

[0005] As a new technology, the forming of large-scale double-curvature variable cross-section through-beam involves many scientific issues such as design, material, process, processing, control, etc. Although the corrugated beam forming process and leaf beam molding process have been studied, but For large-scale double-curvature variable-section variable-thickness beams of the order of 8m, high precision requirements for hyperbolic shapes, large-scale variable cross-sections, variable thicknesses, C-shaped cross-section asymmetric structures, and corner avoidance on both sides, the process The control is difficult, there is a lack of systematic process guidance, and the process needs to be refined. Therefore, in order to develop a fuselage beam with a complex structure and high product precision, a breakthrough in the manufacturing process is required.

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