Honeycomb Sandwich Part Pre-filling and Forming Tooling and Its Process Method

Abstract

The invention relates to a honeycomb sandwich piece pre-encapsulation molding tool, which comprises a honeycomb core and an encapsulation material, wherein a mold is arranged below the honeycomb core and is connected with the honeycomb core through positioning pins; baffle strips are arranged at the periphery of the honeycomb core; an encapsulation sample plate is arranged on the upper part of a honeycomb core encapsulation area and is connected in a positioning way through the positioning pins; a notch for accommodating the encapsulation material is reserved in the encapsulation sample plate; the encapsulation material is arranged in the notch; a pressure plate is arranged on the encapsulation material; an insulation membrane is arranged on the upper surface of an integral structure; a vacuum bag is arranged on the upper surface of the insulation membrane; the periphery of the vacuum bag passes through a sealing rubber strip; a venting felt is arranged on the lower surface at one endof the vacuum bag and in the sealing rubber strip; and a vacuum nozzle is arranged on the upper side corresponding to the venting felt. By the process method, encapsulation positions are accurate; simultaneously, vacuum is used for auxiliary pressurization, so that uniform downward pressure is applied onto all the encapsulation positions, and the phenomenon of stress deformation of a cured honeycomb core caused by non-uniform honeycomb stress is prevented.

Description

technical field [0001] The invention relates to a honeycomb sandwich part pre-filling molding tooling and a process method thereof, which are used in the molding process of a composite material honeycomb sandwich part and belong to the field of structure and molding. Background technique [0002] The composite honeycomb sandwich structure is composed of high-strength composite skin and lightweight core material. Due to the small weight of the core material, the sandwich component made of it can greatly reduce the weight of the structure under the same load-bearing capacity. Among them, the honeycomb core is light in material, high in strength and high in rigidity. It is often used in parts with large component size and high strength requirements. However, the shear resistance of the mechanical connection part of the honeycomb sandwich part is mainly borne by the composite material skin on the surface. The performance of the component can be improved by filling the potting co...

AI Technical Summary

Problems solved by technology

Considering the self-weight of the honeycomb sandwich components, the weight of the components should be reduced as much as possible. The mechanical connection area of ​​the honeycomb sandwich components should be as small as possible. Therefore, it is difficult to accurately position the potting, and the honeycomb core is stressed in the stretching and non-stretching directions. The reaction is different. The traditional manual potting will cause the honeycomb to be unevenly stressed in all directions and generate internal forces. After curing, the honeycomb core is prone to warping and deformation under the release of internal stress, making the honeycomb core unusable.

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