Forming method of composite material of ultra-large size special honeycomb structure

Abstract

The invention belongs to the technical field of composite material manufacturing and shaping and relates to a shaping method of an oversize composite material part with special honeycomb cellular structure. The method includes the following steps of: (1) prefabricating a honeycomb cell component according to the size of a composite material shaping part; (2) cementing a coating on the upper surface and the lower surface of each honeycomb cell component and reserving a coating overlapping part and a honeycomb overlapping part respectively at two sides of each honeycomb cell component; (3) cementing a nylon gauze on the upper surface and the lower surface of the split joint seam in each honeycomb cell component; (4) encapsulating the honeycomb cell component after adhesion in a vacuum bag to be pressurized and solidified; and (5) continuing connection on the encapsulated vacuum bag to extend the size so as to encapsulate and pressurize the honeycomb cell component after adhesion in the vacuum bag. The invention separately prepares the honeycomb cell components, uses an oversize vacuum bag to block up the integral shaping of pressurization, satisfies the overall rigidity and flexibility, has no unrecoverable fold or crack in the cementing seam in bending and achieves the cementation and solidification requirements in normal temperature.

Description

technical field [0001] The invention belongs to the technical field of composite material manufacturing and molding, and relates to a molding method for super-large special honeycomb structure composite material parts. Background technique [0002] There are many forms of molding process for composite materials, such as: autoclave heating and pressure molding, compression molding, RTM injection molding, vacuum-assisted injection molding, pultrusion molding, winding molding, etc., temperature, pressure, time, working space Limitation is the main parameter of this type of equipment, but these forming processes and equipment cannot be used for large structural parts. There is no corresponding large-scale equipment, and such super-sized parts cannot be heated, pressurized, and solidified in the equipment, and cannot be transported. In the case of exceeding the size of the existing equipment and the special oversized parts cannot be transported, it can only be made on site. Co...

AI Technical Summary

Problems solved by technology

[0002] There are many forms of molding process for composite materials, such as: autoclave heating and pressure molding, compression molding, RTM injection molding, vacuum-assisted injection molding, pultrusion molding, winding molding, etc., temperature, pressure, time, working space Limitation is the main parameter of this type of equipment, but these forming processes and equipment cannot be used for large structural parts

There is no corresponding large-scale equipment, and such super-sized parts cannot be heated, pressurized, and solidified in the equipment, and cannot be transported

If the size of the special oversized parts cannot be transported beyond the size of the existing equipment, it can only be made on site