A method for preventing honeycomb core solidification instability deformation and slippage

Abstract

A method to prevent the honeycomb core from solidifying, unstable, deforming and slipping; reserve 30-50mm margins around each component in the honeycomb part, and use potting compound to pot the 30-50mm margin area on the edge of the honeycomb core , and curing, combine the honeycomb core board with the upper and lower gaskets, align the edges and fix them with tape, and drill positioning holes in the margin area 30mm wide from the edge of each edge of the gasket and honeycomb core, And make positioning pins that match the thickness of the part; lay the adhesive film and the upper and lower panel prepregs on both sides of the honeycomb core that drilled the positioning hole, and when the adhesive film and prepreg are laid, place the honeycomb positioning hole Make way, pave the adhesive film on the upper and lower gasket adhesive surfaces respectively, then combine the upper and lower gaskets with the honeycomb core after laying the upper and lower panels respectively, align the positioning holes, and insert the parts with the positioning pins The positioning holes on each edge lock the position of each component; finally, the assembled parts are cured, and the margin of 30-50mm on the edge is removed after the parts are cured.

Description

technical field [0001] The invention belongs to the field of molding and curing of composite materials, and relates to a method for preventing the instability, deformation and slippage of a honeycomb core during curing. Background technique [0002] The invention relates to a honeycomb sandwich structure composite material product, which is composed of upper and lower gaskets, an upper panel (upper skin), a Nomex honeycomb core, an adhesive film, and a lower panel (lower skin). Among them, the gasket is a cured composite material laminate, which is glued and co-cured with the upper and lower panels, honeycomb core and adhesive film. For the Nomex honeycomb core, the compressive strength of the honeycomb plane is relatively high, but it does not have high pressure bearing capacity in the L and W directions. When bonding and co-curing in the autoclave, the lateral pressure will cause the honeycomb core to Shrinkage instability deformation and slippage. Aiming at the problem ...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a process for solving the shrinkage, instability, deformation and slippage of the honeycomb sandwich core of the honeycomb sandwich structure composite material parts in the bonding and co-curing process.

Images