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Method for co-bonding embedded copper strip and composite prepreg

A technology of composite materials and prepregs, which is applied in the processing field of glass fiber reinforced resin matrix composite materials, can solve the problems of difficult positioning and fixing, the shape of parts cannot be shaped, and difficult fixing, so as to avoid positioning deviation, solve the difficulty of shaping, and avoid offset effect

Inactive Publication Date: 2018-11-16
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Glass fiber reinforced resin-based composite materials in the high-temperature system have poor surface quality when forming large-curvature parts with male mold tooling, which is difficult to meet customer needs
When the glass fiber reinforced resin-based composite material of the high-temperature system is co-bonded with the embedded copper tape, when the vacuum bag-autoclave curing method is used, the shape of the part after molding cannot be finalized due to the thin thickness of the copper tape. Difficult to position and fix in conjunction with dipping materials
Embedded copper strip and prepreg billet surface are difficult to fit, the gap between copper strip and blank is compacted after pressurization, and the surface of copper strip is wrinkled, resulting in poor surface quality of the product on the pocket side
It is difficult to position and fix when the embedded copper tape and the glass fiber reinforced resin matrix composite prepreg are co-bonded, and the surface quality is poor

Method used

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  • Method for co-bonding embedded copper strip and composite prepreg

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 As shown, a co-bonding method of embedded copper tape and composite material prepreg is used for co-bonding of embedded copper tape and glass fiber reinforced resin matrix composite material in the vacuum bag-autoclave molding process. During the material laying process, the metal copper tape is bonded to the laid and cured prepreg with an adhesive material, and then the laying and curing of the prepreg is continued in two steps to make it solidified and formed.

[0037] The co-gluing method specifically comprises the following steps:

[0038] S1: Lay the glass fiber reinforced resin-based composite material prepreg on the part tooling mold to the layer before the metal copper strip is placed, and after packaging and compacting in a vacuum bag, perform the first pre-curing in an autoclave. The prepreg is cured to obtain a first precured blank.

[0039] S3: bonding the metal copper strip with an adhesive material, and then placing the metal copper stri...

Embodiment 2

[0043] This embodiment is improved on the basis of Example 1, and the improvement is that: the embedded copper strip blank obtained in S3 is also provided with step S4, and the S4 is to heat and solidify the embedded copper strip blank, which adds The curing temperature of warm curing exceeds the gel point of the bonding material, so that the copper strip and the first-cured blank are fully bonded and fixed on the first-cured blank, avoiding the deviation of the metal copper strip when the prepreg is continued to be laid , Solved the problem of difficult shaping of the metal copper strip due to its thinness.

[0044] The co-gluing method specifically comprises the following steps:

[0045]S1: Lay the glass fiber reinforced resin-based composite material prepreg on the part tooling mold to the layer before the metal copper strip is placed, and after packaging and compacting in a vacuum bag, perform the first pre-curing in an autoclave. The prepreg is cured to obtain a first pr...

Embodiment 3

[0052] This embodiment is improved on the basis of Embodiment 2. The improvement is that in the above S7, after the remaining prepregs are laid up, an equalizing film is placed on the prepregs, and then sealed with a vacuum bag. Send it into an autoclave for curing to make the outer surface of the product smooth and ensure the quality of the non-film surface. Preferably, the pressure equalizing membrane is prepared by curing vulcanized rubber.

[0053] The co-gluing method specifically comprises the following steps:

[0054] S1: Lay the glass fiber reinforced resin-based composite material prepreg on the part tooling mold to the layer before the metal copper strip is placed, and after packaging and compacting in a vacuum bag, perform the first pre-curing in an autoclave. The prepreg is cured to obtain a first precured blank.

[0055] S3: Bond the metal copper strip with an adhesive material, then place the metal copper strip on the surface of the first pre-cured blank, and g...

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Abstract

The invention discloses a method for co-bonding an embedded copper strip and a composite prepreg. The embedded copper strip and a glass fiber-reinforced resin matrix composite material are co-bonded through a vacuum bag-autoclave molding technology. In the prepreg paving process, the copper strip is bonded to the laid and cured prepreg through a binder and the prepreg is paved and cured in two processes so that the prepreg is formed. The method bonds the pre-cured prepreg and the copper strip and solves the problem that the cured prepreg has no rigidity so that the copper strip is difficult tofix and the prepreg easily deforms in the copper strip bonding process.

Description

technical field [0001] The invention relates to the technical field of glass fiber-reinforced resin-based composite material processing, in particular to a method for co-bonding embedded copper strips and composite material prepregs. Background technique [0002] Fiber-reinforced resin-based composites have the characteristics of light weight, high strength, high modulus, fatigue resistance, corrosion resistance, designability and manufacturability, and are ideal aeronautical structural materials. At present, fiber-reinforced resin-based composite materials in high-temperature systems are divided into two types: carbon fiber and glass fiber. Carbon fiber-reinforced resin-based composite materials are the most widely used and mature, while glass fiber-reinforced resin-based composite materials are used in a small amount and are mostly used in flat structures. , There is no precedent in the molding of U-shaped skin and metal co-bonded composite components. [0003] Glass fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54
CPCB29C70/342B29C70/54
Inventor 孙振萍董福露陈泽奎李成龙
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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