Carbon fiber composite material forming process and machine body

A technology of composite material and forming process, which is applied in the field of aerospace applications, can solve the problems of decreased overall structural strength, high cost of mold production, large composite material forming, etc., and achieve the effect of light weight, low cost and increased strength

Pending Publication Date: 2021-04-02
沈阳朗峰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For these parts with special structure and surface requirements, there are big problems in the molding of composite materials.
The existing solution is to use a combined structure of male and female molds for molding, but due to the complex structure of the product, it is difficult to demould the product
On the other hand, for experimental products and small batch production enterprises, the cost of mold making is high and demoulding is difficult, and the molded products usually only have a smooth outer surface
For the forming process of large parts, only the pasting after splitting can be used, which will inevitably reduce the strength of the overall structure

Method used

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  • Carbon fiber composite material forming process and machine body
  • Carbon fiber composite material forming process and machine body
  • Carbon fiber composite material forming process and machine body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as figure 2 As shown in -4, the body of this embodiment is irregularly shaped and closed, thin-walled, and curved. The range of wall thickness varies between 1.5-15mm. The cross-sectional shape is irregular, with certain radians on both sides. Like a bow, the closed structure of the body is similar to a ring, and the diameter varies between 800-1200mm. The body is suitable for vertical take-off and landing aircraft, and has the characteristics of high safety, compact structure and strong comprehensive performance. Its molding includes the following steps:

[0053] 1) According to the design of the body, the polymer components are integrally formed.

[0054] The polymer components are manufactured according to the design requirements of the body. Since the body 1 is a complex structure with irregular shape, thin walls and curved surfaces, this embodiment uses CNC wire cutting processing, which is integrally formed with high precision, fast speed, and stable qual...

Embodiment 2

[0079] Basically the same as embodiment 1, such as Figure 5-7 As shown, the body of this embodiment is irregularly shaped and closed, thin-walled, and curved. The wall thickness varies from 2 to 20 mm. Its closed structure is similar to a ring, and its diameter varies between 600-1000mm. The machine body has a machine arm 2, which is a suspended structure and integrally connected with the machine body. During the forming process, it should be noted that in step 1, the machine arm 2 and the machine body 1 are integrally formed, preferably by CNC machining, and the tolerance is controlled within + 0.02mm. The body and the arm form an organic whole, the purpose of which is to increase the strength of the structure, the high structural integrity, and the improvement of the performance of the body. If it is necessary to further increase the strength of the connection part, metal parts can be pre-embedded in the corresponding position.

[0080] In step 2, the carbon fiber cloth ...

Embodiment 3

[0085] In this embodiment, a rectangular parallelepiped with regular shape is used for the experimental test, which is only used to obtain the experimental data related to the strength of the composite material.

[0086] Use 3k twill carbon fiber dry cloth (purchased from Yixing Junchao Carbon Fiber Products Co., Ltd.), epoxy resin (purchased from Yituo Composite Materials Co., Ltd.), and the polymer used is the same as that in Example 1.

[0087] Among them, the experimental group adopts polymer carbon fiber composite structure, and the comparison group adopts carbon fiber epoxy resin laminated structure.

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Abstract

The invention provides a carbon fiber composite material forming process and a machine body, and relates to the technical field of aerospace application. The carbon fiber composite material forming process comprises the following steps of integrally forming and manufacturing a polymer component, cutting or clipping carbon fiber cloth, laying the carbon fiber cloth, carrying out curing and forming,and carrying out surface treatment. A formed part has high specific strength, high specific modulus, light weight, shock resistance and flame retardance, the strength of the structure is improved, and the safety of an aircraft is improved.

Description

technical field [0001] The invention relates to a carbon fiber composite material forming process and a body, belonging to the technical field of aerospace applications. Background technique [0002] Compared with metal materials, composite materials have high specific strength, high specific modulus, low density, good shock resistance and fatigue resistance, and have a large number of applications in aerospace and military fields. Aircraft play an increasingly important role in the national defense and civilian fields, and their requirements for materials are getting higher and higher. The designability and low density of composite materials can meet the requirements of aircraft applications. The value of saving structural mass on different aircraft is not the same, but in order to achieve the goal of weight reduction, in addition to optimizing the structural form, it is also necessary to use materials with high specific strength and high specific modulus. [0003] In orde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54
CPCB29C70/34B29C70/54
Inventor 李盛宏
Owner 沈阳朗峰科技有限公司
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