A method of manufacturing an airbag-assisted composite material reinforced wall panel

Abstract

The invention belongs to the technical field of composite material processing molding and provides an airbag-assisted production method for a composite material stiffened wall plate. Through a co-curing method, rods can be in a T shape, or a J shape or an L shape. A molding tool comprises a forming die, an airbag molding die and a rib laying die. The method has the following advantages that (1) extrusion molding of ribs are achieved through a metal core die and a rubber airbag, the metal core die can ensure the outline of the ribs, the pressure in the a heat pressure tank can be effectively transmitted to parts through the airbag, pressure can be applied to the parts uniformly, and the curing quality of the ribs is ensured; (2) groove positions of the forming die are completed through numerical-control milling, the precision is high, and the axial lines of the ribs can be ensured in the whole curing period; and (3) the ribs are integrally formed in the grooves , the loss of resin can be prevented through the metal core die on one side, a whole die cavity can be filled through the airbag on the other side in the inflated state, the loss of the resin can be prevented and the thickness of the parts can be ensured.

Description

technical field [0001] The invention belongs to the technical field of composite material processing and molding, and relates to a method for manufacturing an airbag-assisted composite material reinforced wallboard. Background technique [0002] With the extensive application of composite materials in military and civilian aircraft, some key and important parts are designed in the form of reinforced panels. Combining ribs on the skin can basically guarantee the quality of the skin, but for the ribs, it is necessary to control the accuracy of the shape of the ribs, such as flatness and axis direction, and ensure the quality of curing. At present, the forming tooling of ribs is mainly in the form of double-sided metal mandrel, double-sided airbag or single-sided solid rubber soft mold combined with unilateral metal mandrel. If the form of a double-sided metal mandrel is used, the shape of the ribs can be well guaranteed, but this form involves the cooperation between tooling ...

AI Technical Summary

Problems solved by technology

If the form of a double-sided metal mandrel is used, the shape of the ribs can be well guaranteed, but this form involves the cooperation between tooling and often requires extremely high machining accuracy, which puts extremely high demands on the manufacture of the metal mandrel. requirements

In addition, the continuous stress of the metal tooling during repeated use may cause slight deformation of the local profile. The pressure transmission through such metal tooling will cause uneven pressure on the ribs, which may lead to internal quality problems of the parts

If the form of double-sided airbags is used, it can ensure the uniform transmission of pressure, and then ensure the quality of curing, but the double-sided airbags are made of soft materials, which cannot guarantee the shape of the ribs, which may cause surface quality problems and axis trend deviation

If one-sided solid rubber soft mold is used in combination with one-sided metal mandrel, the shape of the ribs can be guaranteed in the same way, but the pressure during the curing process comes from the expansion of the rubber soft mold itself, and the value and transmission process of this part of the pressure cannot be explained. Uniformity in

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