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A method for forming a composite material structure

A molding method and composite material technology, applied in the field of composite materials, can solve the problems of difficult molding, weak rigidity, etc., and achieve the effects of low porosity, high-performance molding, and expanding the scope of application

Active Publication Date: 2021-06-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a molding method for composite structural parts to solve the problem of difficult molding caused by the characteristics of large size, variable curvature, and weak rigidity of composite structural parts (storage tanks) in the aerospace field.

Method used

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  • A method for forming a composite material structure
  • A method for forming a composite material structure
  • A method for forming a composite material structure

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Embodiment Construction

[0029] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims.

[0030] A molding method of a composite material structural part, the composite material structural part is a tank structure that includes a top cover through hole 3.1 and a bottom cover through hole 3.2 and is integrally formed by a carbon fiber resin composite material prepreg 3; specifically , the molding method includes the following steps:

[0031] S1: First lay the prepreg 3 on the silicone rubber mold 4 according to the layering method to form a preform, and then use the vacuum bag 2 to seal the prepreg 3 and the silicone rubber mold 4 to complete the bag making process;

[0032] S2: Move and place the sealed material in the groove 6.1 of the vibration support seat 6, and fix the vibration support seat and the material platform 7 of the vibration micro...

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Abstract

The invention discloses a molding method of a composite material structural part, which includes sealing bag making, vibration treatment, microwave curing and integral demoulding of the structural part; the vibration treatment is to fix the sealed bag material on a vibrating support seat and combine it with the material The platform vibrates synchronously; the microwave curing uses the mold support frame and the support shaft to support the silicone rubber mold, and uses microwaves to uniformly irradiate each surface of the preform; removed from the structure. The forming method of the present invention combines vibration treatment with microwave curing composite materials, which can realize fast, low-cost and high-performance forming of composite material structural parts; the present invention breaks through the limitation of the autoclave forming process on the size of the workpiece, and reduces the manufacturing cost; forming The finished structural parts have excellent mechanical properties and low porosity, and their performance and quality can reach the same level as those after curing in an autoclave.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for forming composite material structural parts. Background technique [0002] The autoclave process is currently the most commonly used process for curing and molding high-performance resin-based composite materials for aerospace. The high-temperature compressed gas inside the autoclave is used to generate pressure to heat and pressurize the composite material prepreg to complete the curing molding . However, when heating and curing, when the heat is transferred from the outside to the inside of the material, the temperature distribution inside the material will be uneven, which will make the degree of curing uneven, and a large internal stress will be generated inside the material, which will affect the forming quality of the part. At the same time, due to the complex structure and huge system of the autoclave, which is a high-pressure pressure vessel, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/30B29C35/08B29C33/44B29L31/30
CPCB29C33/448B29C35/0805B29C70/30B29C2035/0855B29L2031/3097
Inventor 湛利华关成龙戴光明肖瑜杨晓波吴欣桐彭益丰赵国庆
Owner CENT SOUTH UNIV
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