Flexible positioning method for Z-shaped stringer of composite material stiffened wall plate

Abstract

The invention discloses a flexible positioning method for a Z-shaped stringer of a composite material stiffened wall plate. According to the method, a flexible positioning device is used for positioning. The flexible positioning device comprises a positioning angle seat, a specially-made high-temperature-resistant pressure spring, a special pin and a composite material gasket. By using the method,the position degree control requirement of the Z-shaped stringer can be met when a dry-state Z-shaped stringer and a wet-state wall plate skin are jointly glued, the situation that a positioning coremold causes indentations on the surface of the wet-state wall plate skin is avoided, and the surface flatness and thickness requirements of the wall plate skin are ensured. Meanwhile, cutting of avoiding notches in auxiliary materials such as a vacuum bag, a breathable felt and an isolating membrane is not needed during gluing, curing and bag making, the integrity of the vacuum bag is ensured, bag bursting during curing is avoided, and the curing and forming quality of a workpiece is effectively ensured. The bag making process is easy and convenient to operate, and the production efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of composite material forming technology, and relates to a flexible positioning method for a Z-shaped stringer with a composite material reinforced wall. Background technique [0002] The composite material reinforced wall panel has Z-shaped long stringers, which are formed by the dry stringer-wet skin co-gluing scheme, and the position of the stringer is required to be ±1.5mm. The conventional Z-shaped girder positioning method is to place the girder positioning mandrel and the cured Z-shaped girder on the skin after the wall panel skin is paved, and set the positioning pin on the positioning card plate. Position the mandrel for accurate positioning to achieve the position control requirements of the Z-shaped truss. [0003] When using a conventional positioning system for dry stringer-wet skin co-gluing to make bags, it is necessary to cut gaps in the auxiliary materials such as vacuum bags, air felts, an...

AI Technical Summary

Problems solved by technology

The high temperature and high pressure environment is required for the curing of parts, and every positioning pin avoidance gap on the vacuum bag becomes a risk point of air leakage, which leads to an increase in the risk of curing and molding of the part

And the bag making process is complicated, time-consuming and labor-intensive, and requires a high level of skill for the operator

On the other hand, the skin of the wall panel is in a wet state, and the positioning mandrel moves downward under pressure during the curing process, forming indentations on the surface of the skin of the wall panel, resulting in problems of uneven surface of the skin of the wall panel and excessive thickness

It can be seen that the conventional positioning system cannot meet the manufacturing requirements of the Z-shaped truss-reinforced panel parts, and structural optimization of the conventional positioning system is required

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