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A method for manufacturing a carbon fiber composite multi-way joint

A technology of composite materials and multi-way joints, which is applied in the field of carbon fiber composite material multi-way joints, can solve the problems of high cost of automatic wire laying process, assembly interference of winding process parts, complex mold design of molding and RTM process, etc., to achieve The effect of satisfactory quality, low cost and simple mold structure

Active Publication Date: 2021-04-02
HENGSHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the problems of complex mold design for molding and RTM process, assembly interference of winding process parts and high cost of automatic wire laying process, and further provides a manufacturing method of multi-way joint of carbon fiber composite material

Method used

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  • A method for manufacturing a carbon fiber composite multi-way joint
  • A method for manufacturing a carbon fiber composite multi-way joint
  • A method for manufacturing a carbon fiber composite multi-way joint

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Experimental program
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Effect test

specific Embodiment approach 1

[0031] The manufacturing method of the carbon fiber composite multi-way joint of the present embodiment is realized according to the following steps:

[0032] Step 1: Mold treatment: Remove oil stains, water stains and dust on the 3 / 4 petal structure and 1 / 4 petal structure molds of the formed carbon fiber composite multi-way joint, and evenly coat the outer surface of the mold with carbon fiber composite materials. Mold agent 3 times, each interval 15min;

[0033] Step 2: Forming the two-petal structure: Lay the prepreg fabric that has been cut according to the design, and manually lay it on the mold with the two-petal structure. The laying method is that after the first layer is laid, under a negative atmospheric pressure, Pre-compact for 15 minutes, and then pre-compact once every 4 layers until the laying is completed. The fabric is 6k carbon fiber fabric;

[0034] Step 3: Curing in the curing oven: Lay the release cloth, isolation film, air felt and vacuum bag from the i...

specific Embodiment approach 2

[0042] The manufacturing method of the carbon fiber composite multi-way joint of the present embodiment is realized according to the following steps:

[0043] Step 1. Mold treatment: Remove oil stains, water stains and dust on the 3 / 4 petal structure and 1 / 4 petal structure molds of the formed carbon fiber composite multi-way joint, and evenly coat the outer surface of the mold with carbon fiber composite materials. Molding agent 2 times, each interval 10min;

[0044] Step 2. Forming of the two-petal structure: Lay the prepreg that has been cut according to the design, and manually lay it on the mold with the two-petal structure. Compact for 10 minutes, and then pre-compact once every 5 layers until the laying is completed, and the fabric is 3k carbon fiber fabric;

[0045] Step 3. Autoclave curing: Lay the release cloth, isolation film, air felt and vacuum bag sequentially from the inside to the outside. After the vacuum bag is pressed, the autoclave is cured. According to t...

specific Embodiment approach 3

[0053] The manufacturing method of the carbon fiber composite multi-way joint of the present embodiment is realized according to the following steps:

[0054] Step 1. Mold treatment: Remove oil stains, water stains and dust on the 3 / 4 petal structure and 1 / 4 petal structure molds of the formed carbon fiber composite multi-way joint, and evenly coat the outer surface of the mold with carbon fiber composite materials. Mold agent 3 times, each interval 10min;

[0055] Step 2. Forming of the two-petal structure: Lay the cut fabric according to the design, and manually lay it on the mold of the two-petal structure. The laying method is that after the first layer is laid, it is pre-compacted under a negative atmospheric pressure. 20min, then pre-compact every 4 layers until the laying is completed, the fabric is 12k carbon fiber fabric;

[0056] Step 3. Curing in the curing oven: Lay out the mold release cloth, guide net, winding pipe and vacuum bag in sequence from the inside to t...

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Abstract

A manufacturing method of a carbon fiber composite material type multi-way joint is characterized in that the joint categories include a four-way joint, a five-way joint, a six-way joint, a seven-wayjoint and an eight-way joint. The method mainly comprises the following steps of processing of a die; forming of two-section structures (1 / 4 section and 3 / 4 section); curing; releasing of the die; processing and grinding; cementing and assembling; integral curing and modifying; and annularly reinforcing. According to the manufacturing method, the two-section structure of the carbon fiber compositematerial type multi-way joint can be integrally formed during cementing and assembling; the conflict that secondary through pipes cannot be inserted into the corresponding joints at two ends during assembling of a complex truss structure can be solved; and meanwhile, a main through pipe point and a secondary through pipe joint can be annularly reinforced, so that the demand of complex load of themulti-way joint in the truss structure can be met.

Description

technical field [0001] The invention relates to complex truss structures in the fields of aviation, aerospace and the like, in particular to a method for manufacturing a carbon fiber composite material multi-way joint. Background technique [0002] The truss structure is light in weight, flexible and easy to disassemble, and can be adjusted according to needs to meet different loads and layout requirements. It has been widely used in aerospace structures, such as solar UAV truss fuselage, airship support structure and space station and Satellite support structures, etc. The main body of the truss structure is composed of truss joints through connection and combination. Generally speaking, the shape of the truss joints is relatively complex, and it is a multi-dimensional space and multi-directional structural member, which requires high spatial mechanical properties. [0003] The molding process of truss joints includes prepreg molding process, winding process, RTM process a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/36B29C65/48B29L31/24
Inventor 陈明新吴琼谢昌江冯光亮
Owner HENGSHEN
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