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

A technology of integral molding and composite materials, applied in the field of resin-based composite material molding, can solve the problems of surface deviation assembly coordination, increase tooling costs, increase material and process costs, etc., to reduce manufacturing accuracy, save tooling, reduce The effect of manufacturing costs

Active Publication Date: 2014-08-13
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] Embodiment 1: The integrally formed "J" type reinforced panel structure is as follows image 3, "J"-shaped reinforced wall panels have an overall dimension of 900mm×520mm×105mm (length×width×height), and there are 5 reinforcements 8 with a "J"-shaped section in the longitudinal direction on the skin 7, and the material is G0827 / QY9512 , Formed as a whole through RFI technology. The 5 "J"-shaped ribbed upper flanges and the metal parts at both ends are required to be assembled with the upper skin 12. In order to ensure that the outer surface 10 of the 5 "J"-shaped reinforced The coordination and consistency of the inner surface profile, the accuracy of the outer profile surface 10 of the five "J"-shaped reinforced upper flanges must be controlled within ±0.2mm, and here we adopt the mold solution of the present invention.

[0037] A. Considering that the shape of the stiffened plate is plane, the shape mold 1 is designed as a simple platform structure, and the dimensio...

Embodiment 2

[0042] Embodiment 2: box type structure test pieces such as Figure 6 , consists of a "J"-shaped reinforced wall panel and an upper skin 12, wherein the reinforced wall panel is a wall panel structure with two "J"-shaped reinforcements in the longitudinal direction, and the overall dimensions are 1800mm×800mm×160mm (length×width × high), the material system adopts U3160 / QY9512. In order to improve structural integrity and achieve structural weight reduction, the interface between the ribbed lower flange of the wall plate and the skin is reinforced by stitching, and then integrally formed by the RFI process. The upper skin is of variable thickness, and the accuracy of the mating surface with the upper flange of the wall plate reinforcement is within ±0.15mm. Such a high precision is almost impossible to achieve for the parts formed by the traditional mold scheme. Usually, it is necessary to machine the outer surface 10 of the ribbed upper flange after forming or to perform sec...

Embodiment 3

[0048] Embodiment 3: The reinforced panel structure is as Figure 9 , the shape is a curved surface, the size is 2500mm×700mm×250mm (length×width×height), there are 3 “J”-shaped reinforcements in the longitudinal direction of the skin, and the material is G0827 / QY9512. In order to improve the structural integrity, the lower flange is reinforced It is reinforced by stitching with the skin, and then integrally formed by RFI process. The surface accuracy of the 3 ribbed upper flanges is required to reach ±0.15mm. The mold still adopts the mold scheme of the present invention, such as Figure 13 .

[0049] A. Outline mold 1 adopts frame welding structure, and the surface of outline mold 1 is designed according to the digital model of reinforced wall plate, such as Figure 10 shown. Considering the needs of reinforcement positioning and packaging, the external dimension of shape mold 1 is widened by 200mm on one lateral side perpendicular to the reinforcement, and the axial sh...

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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 forming technology, and relates to a mold for integrally forming a "J"-shaped reinforced composite material wall plate. Background technique [0002] At present, composite materials are used in more and more parts of the aircraft, and the advantages of advanced composite materials such as high specific strength, high specific stiffness 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, the application of composite materials has been applied more and more from the secondary load-bearing components to the main load-bearing components, and the structural form has also changed from simple single parts to complex overall components. [0003] Typical aircraft components, such as wings and vertical tails, mostly adopt the structural form of upper and lower skins combined with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C33/42
Inventor 高艳秋赵龙刘强
Owner AVIC COMPOSITES