Method for manufacturing hollow box type element with non-circular section from carbon fiber composite

Abstract

The invention relates to a method for manufacturing hollow box type element with non-circular section from carbon fiber composite, mainly comprising the following steps: preparing a female die outer shape mold for solidification of parts, a female die inner shape mold, a male die for the lay-up, and a soft mold for solidification; laying up the composite on the male die; placing vacuum bags into the inner space of the part and packaging the mold with vacuum bags; applying vacuum to the inner and outer vacuum bags so that the part billet can fit to the cavity of the mold; pre-pressing the mold at a mediate temperature, during which the solidifying pressure and the temperature point for application of the pressure are determined by calculation and experiment. By applying pressure from both inside and outside, applying pressure for molding solidification from the cavity of the mold, and applying completely same pressure to the surface of the mold at the same time to balance the internal pressure of the mold, the method of invention solves the defect that the method in the prior art cannot apply pressure to complex sections, variable sections and angles, and also solves the problems of angle layering and difficult mold releasing of light hollow elements with irregular sections like rectangular tubes.

Description

[0001] technical field [0002] The invention relates to a method for manufacturing a hollow box-shaped member with a non-circular cross-section of carbon fiber composite material, in particular to a method for manufacturing a hollow box-shaped light-body member with a rectangular cross-section or a special-shaped cross-section of carbon fiber composite material. Background technique [0003] The processing of composite materials usually adopts the traditional process method of thermosetting composite materials. In order to further improve efficiency and low-cost manufacturing technology, a series of three-dimensional preform / liquid molding method (LCM) and resin film melt impregnation (RFI) process have been developed recently; the RFI process melts the resin film to impregnate the preform by heating , and finally cured to obtain composite components. However, the processing technology of composite materials such as circular, rectangular cross-section or special-shaped...

AI Technical Summary

Problems solved by technology

[0005]Although part of the tubular parts can be cured by airbag pressurization, which is feasible for round tubular parts, but For rectangular tube parts, it is difficult to apply and reach the same curing pressure as the flat part

[0006] At present, there is no relevant report on the manufacturing method of rectangular tubular carbon fiber composite components with complex bending and twisting surfaces and variable cross-sections

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