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Method for rapidly repairing metal crack damage with composite material

A composite material and metal technology, applied in the field of composite material adhesive repair, can solve the problems of low strength, average repair effect, high internal porosity of composite patch, etc., to achieve fast and convenient repair, low porosity, high mechanical properties Effect

Inactive Publication Date: 2020-12-04
国营芜湖机械厂
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Problems solved by technology

[0003] Wet bonding repair is often used in composite material bonding to repair metal cracks in the external environment due to its long storage period and no need for refrigeration. However, in the traditional wet bonding repair process, resin is added to fibers or fabrics. Then use a scraper to scrape it flat, and then seal the vacuum bag for curing. The cured composite patch has high internal porosity, low strength, and average repair effect. Therefore, it needs to be improved to meet higher performance repair needs.
[0004] Resin vacuum infusion method is a convenient method for manufacturing composite laminates. Due to the vacuum-assisted effect, it can effectively reduce the porosity of the prepared laminates. Resin vacuum infusion repair process method

Method used

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  • Method for rapidly repairing metal crack damage with composite material
  • Method for rapidly repairing metal crack damage with composite material

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Embodiment Construction

[0036] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further elaborated below.

[0037] Such as figure 1 and figure 2 As shown, a method for quickly repairing metal crack damage with composite materials, wherein the metal crack length is 60mm, and the resin vacuum infusion method is used for repair. The repair resin is J-313 modified epoxy resin adhesive, and the resin viscosity is at room temperature. 800Cps, the CF3031 carbon fiber fabric used, the heat repair instrument used is HCS9200B, and the specific steps are as follows:

[0038] S1: Surface treatment: Use 120-mesh water sandpaper to polish the 200mm*200mm range of the damaged part, and then use 200-mesh water sandpaper to polish;

[0039] S2: laying reinforced fiber cloth: cut the fiber fabric into a size of 100mm*100mm, and lay 8 layers of fabric according to the laying angle required by the repair plan...

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Abstract

The invention relates to the field of composite material cementing repair, in particular to a method for rapidly repairing metal crack damage with a composite material. The method comprises the stepsof first, carrying out surface treatment; second, laying fiber reinforced polymer; third, laying strippable cloth; fourth, placing metal plates with holes; fifth, laying flow distribution net; sixth,laying a t-branch pipe; seventh, connecting a first vacuum equipment; eighth, sealing a vacuum bag; ninth, bonding a thermocouple to the vacuum bag, and laying an electric blanket on the vacuum bag; tenth, laying air-permeable felt on the electric blanket, and placing a vacuum joint on the air-permeable felt; eleventh, adhering sealing rubber strips; twelfth, carrying out vacuum pumping; thirteenth, program setting; fourth, carrying out solidification; and fifth, carrying out finishing. According to the method for rapidly repairing metal crack damage with a composite material, by combining thecharacteristics of a composite material wet bonding metal crack technology and a resin vacuum pouring technology, the resin vacuum pouring technology is used in cooperation when composite material bonding is used to repair metal cracks, the requirements on repair for quickness and convenience are met, and the mechanical property is higher than that of traditional composite material wet bonding repair.

Description

technical field [0001] The invention relates to the field of adhesive bonding repair of composite materials, in particular to a method for quickly repairing metal crack damage with composite materials. Background technique [0002] The method of repairing metal cracks by bonding composite materials has the advantages of less weight, no need to drill holes, no stress concentration, corrosion resistance, and especially the ability to maintain aerodynamic shape, so it is used as an efficient, fast, and low-cost repair method for zero Component metal crack repair process. Commonly used composite bonding repair methods are divided into dry repair and wet repair. [0003] Wet bonding repair is often used in composite material bonding to repair metal cracks in the external environment due to its long storage period and no need for refrigeration. However, in the traditional wet bonding repair process, resin is added to fibers or fabrics. Then use a scraper to scrape it flat, and t...

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 宣善勇刘金生张璟孙运刚
Owner 国营芜湖机械厂
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