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A molding tool for foam sandwich composite structure winglet

A composite material and molding tooling technology, which is applied in the field of molding tooling of foam sandwich composite structure winglets, can solve the problems of difficult control of internal quality and surface quality, complex profile, large regional curvature, etc. Quality and surface quality, reducing mold weight, ensuring the effect of surface quality

Active Publication Date: 2019-05-14
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the foam sandwich composite structure winglet is difficult to manufacture due to its complex shape and large curvature in some areas, and it is difficult to control the internal quality and surface quality after manufacture.

Method used

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  • A molding tool for foam sandwich composite structure winglet
  • A molding tool for foam sandwich composite structure winglet
  • A molding tool for foam sandwich composite structure winglet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] The forming tooling used for the foam sandwich composite structure winglet is composed of an upper forming die 1 and a lower forming die 2, the upper forming die 1 is a resin-based composite material mold, and the lower surface of the mold is connected with the foam sandwich composite material structural winglet. The profiles on the tiplets are the same. The upper forming die 1 carries out lay-up molding on the upper forming die stacking die 13 . The lower forming die 2 is a composite material frame die, which is composed of a longitudinal partition 5, a transverse partition 6, a bottom plate of the lower forming die frame 12 and a forming panel 3 of the lower forming die. During the manufacturing process of the lower forming die 2, the 8mm thick glass The fiber board is processed by numerical control, and the lower forming mold transverse partition 5, the lo...

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Abstract

The invention belongs to the technical field of composite aviation manufacturing and relates to a forming tool for a winglet of a foam sandwich composite structure. The forming tool is composed of an upper forming mold and a lower forming mold. The upper forming mold is a composite mold and is used for ensuring the outline dimension and the surface quality of the upper molded surface of the winglet in the winglet forming process. The lower forming mold is a composite frame mold and is used for supporting and fixing a whole part and ensuring the outline dimension and the surface quality of the lower molded surface of the winglet in the winglet forming process. The molded surface of the lower forming mold is a variable-thickness composite molded surface. The butt joint area of the front edge of the lower forming mold and the upper forming mold is provided with a thinning area to ensure the uniformity of a pressure field in the large-curvature area of the front edge of the winglet. The forming tool for the winglet of the foam sandwich composite structure is easy to operate, demolding is easy, the problem that large-curvature complex structure parts similar to the winglet are unevenly pressurized is solved, and the internal quality and the surface quality of the parts are well ensured.

Description

technical field [0001] The invention belongs to the technical field of composite material aviation manufacturing, and relates to a molding tool for a foam sandwich composite material structure winglet. Background technique [0002] Composite materials have become one of the most important contemporary aeronautical structural materials due to their high specific strength, high specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, good dimensional stability, and ease of large-area overall forming. . The position and amount of composite materials used in aircraft have become one of the main indicators to measure the advancement of aircraft structure. The B787 "Dream" civil aircraft developed by Boeing uses 50% of composite materials, and the A350 aircraft that Airbus will launch soon uses 52% of composite materials. Research and practice have proved that adding winglets to the wings can effectively reduce drag and improve the fuel e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/34B29C70/54B29C70/78
CPCB29C70/342B29C70/54B29C70/78
Inventor 邱启艳袁超程文礼蒋金隆
Owner AVIC COMPOSITES
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