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Mold for integrally molding J-shaped reinforced composite material wall plate

A technology of integral molding and composite materials, which is applied in the field of resin-based composite material molding, can solve the problems of increasing material and process costs, surface deviation assembly coordination, and increasing tooling costs, so as to save tooling, reduce manufacturing precision, and reduce The effect of manufacturing costs

Active Publication Date: 2013-01-02
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the assembly coordination problem caused by surface deviation, the method of secondary compensation is usually adopted, that is, after the parts are formed, the external surface of the upper flange is compensated twice on the special tooling, which not only increases the cost of the tooling, but also increases the cost of materials and process cost

Method used

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  • Mold for integrally molding J-shaped reinforced composite material wall plate
  • Mold for integrally molding J-shaped reinforced composite material wall plate
  • Mold for integrally molding J-shaped reinforced composite material wall plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: The structure of the integrally formed "J"-shaped stiffened wall panel is as image 3 , "J"-shaped stiffened wall panel has an external dimension of 900mm×520mm×105mm (length×width×height), and the skin 7 is longitudinally provided with 5 “J”-shaped ribs 8, and the material is G0827 / QY9512 , Formed as a whole through RFI technology. The five "J"-shaped reinforced upper flanges and the metal parts at both ends are required to be assembled with the upper skin 12, in order to ensure the outer surface 10 and the metal parts at both ends of the five "J"-shaped reinforced upper flanges and the upper skin For the coordination and consistency of the inner surface profile, the precision of the outer profile 10 of the five "J"-shaped reinforced upper flanges must be controlled within ±0.2mm. Here we adopt the mold solution of the present invention.

[0037] A. Taking into account that the shape of the stiffened plate is flat, the shape mold 1 is designed as a simple plat...

Embodiment 2

[0042] Example 2: Box-shaped structure test piece such as Image 6 , Is composed of "J"-shaped stiffened wall panel and upper skin 12, among which, the stiffened wall panel is a structure with two "J"-shaped reinforced wall panels in the longitudinal direction. The external dimension is 1800mm×800mm×160mm (length×width). ×High), the material system adopts U3160 / QY9512. In order to improve the structural integrity and achieve structural weight reduction, the interface between the ribbed lower flange of the wall panel and the skin is enhanced by stitching, and then the RFI process is used for integral molding. The upper skin is of variable thickness, and the accuracy of the mating surface with the upper flange of the wall panel is within ±0.15mm. Such high accuracy is almost impossible to achieve for parts molded by traditional mold solutions. It is usually necessary to use mechanical processing or secondary compensation on special tooling to reinforce the upper flange surface 10...

Embodiment 3

[0048] Example 3: The structure of stiffened wall panel is as Picture 9 , The shape is curved, the size is 2500mm×700mm×250mm (length×width×height), the skin has 3 "J"-shaped reinforcements in the longitudinal direction, the material is G0827 / QY9512, in order to improve the structural integrity, the lower flange is reinforced The skin is reinforced by stitching, and then integrally formed by the RFI process. The accuracy of the 3 ribs upper flange surface is required to reach ±0.15mm. The mold still uses the mold solution of the present invention, such as Figure 13 .

[0049] A. The shape mold 1 adopts the frame welding structure, and the shape of the shape mold 1 is designed according to the digital model of the stiffened wall plate, such as Picture 10 Shown. Considering the needs of reinforcement positioning and packaging, the outline size of the profile mold 1 is widened by 200mm on the lateral side perpendicular to the reinforcement, and the axial profile mold of the re...

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Abstract

The invention belongs to a resin-based composite material molding technology, and relates to a mold for integrally molding a J-shaped reinforced composite material wall plate. The mold provided by the invention comprises an appearance mold 1, a positioning block 2, an upper flange forming mold 3, a limiting mold 4, a lower flange forming mold 5, and an auxiliary mold 6. According to the invention, the appearance mold 1 is adopted as a basis, and the positioning block 2, the upper flange forming mold 3 and the limiting mold 4 are positioned sequentially. Through the controlling over position precision of the assembled upper flange forming mold 3 and the assembled limiting mold 4, precision of the upper flange appearance surface of the J-shaped reinforcing rib and axis position precision of the reinforcing rib are ensured. Therefore, mold manufacturing cost is reduced, and manufacturing cycle is shortened.

Description

Technical field [0001] The invention belongs to resin-based composite material molding technology, and relates to a mold for integrally molding a "J"-shaped reinforced composite material wall panel. Background technique [0002] At present, more and more parts of the aircraft adopt composite materials, and the advantages of advanced composite materials such as high specific strength, high specific rigidity and designability are used to reduce structural weight and improve aircraft maneuverability or carrying capacity. With the continuous expansion of the amount of composite materials, more and more application parts of composite materials have been applied from secondary load-bearing members to main load-bearing members, and the structural form has also changed from simple single parts to complex integral members. [0003] Typical aircraft components, such as wings, vertical tails, and other structural parts, mostly use a combination of upper and lower skins and multiple reinforcem...

Claims

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Application Information

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IPC IPC(8): B29C33/42
Inventor 高艳秋赵龙刘强
Owner AVIC COMPOSITES
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