A patch wrapping process for repairing cracked aluminum alloy pipes with carbon fiber prepreg
A technology of carbon fiber prepreg and aluminum alloy tubes, which is applied in the field of composite materials, can solve the problems of immature wrapping technology for repairing cracked aluminum alloy tubes with composite materials, and less research on repairing cracked aluminum alloy tubes with composite materials, so as to improve the bearing capacity and avoid cracking effect
Inactive Publication Date: 2017-01-25
PLA UNIV OF SCI & TECH
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Problems solved by technology
[0003] At present, the research on repairing cracked aluminum alloy plates with composite materials at home and abroad has been very in-depth. However, there are very few studies on the repair of cracked aluminum alloy tubes with composite materials, resulting in the immature wrapping process for repairing cracked aluminum alloy tubes with composite materials. Especially the wrapping process of carbon fiber prepreg repairing aluminum alloy cracked pipe
Method used
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Embodiment
[0022] The present invention finally obtains the repair component (such as image 3 ), including positioning, gluing, winding and curing four steps, the specific process is as follows.
[0023] (1) Positioning, taking the crack 3 of the aluminum alloy tube as the symmetrical point, paste ordinary adhesive tape (clear tape, etc.) on both ends of the crack 3 of the aluminum alloy tube symmetrically, and the inner distance between the two adhesive tapes 4 is 100mm. The experimental measurement: when the two adhesive tapes When the inner distance of 4 (that is, the width of patch 5) is 100mm, the repair effect of patch 5 is the best;
[0024] (2) Applying glue, mixing acetone and epoxy resin with a volume ratio of 1:1 to obtain epoxy resin glue, and evenly applying the prepared epoxy resin glue between the two tapes 4;
[0025] (3) Winding, the prepared patch 5 is wound between two adhesive tapes 4 for a circle, and the overlapping length is 1mm;
[0026] (4) Curing. Heat and cu...
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Abstract
The invention discloses a vamp wrapping process for a carbon fiber prepreg repaired aluminum alloy crack pipe. The process comprises the following steps of symmetrically adhering adhesive tapes to the two ends of a crack of the aluminum alloy pipe by taking the crack of the aluminum alloy pipe as a symmetry point, wherein the space between the inner sides of the two adhesive tapes is the length of a vamp; uniformly smearing epoxy resin glue between the two adhesive tapes; cutting prepreg into rectangles, laminating the rectangles, preheating the prepreg for 10 to 15min to form the vamp at 30 to 40 DEG C, and winding the vamp between the two adhesive tapes, wherein the overlapping length is 1mm; winding a paper self-adhesive tape on the surface of the wrapped vamp for two circles, and performing heating curing. Compared with the prior art, the process has the significant advantages that (1) the bearing capacity of a pipe fitting repaired by the vamp wrapping process is improved and stabilized; (2) the phenomenon of cracking of the prepreg in a winding process can be effectively avoided.
Description
technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a patch wrapping process for repairing cracked aluminum alloy pipes with carbon fiber prepregs. Background technique [0002] The technology of repairing damaged aluminum alloy components by bonding composite materials is a high-quality, high-efficiency, and low-cost structural repair technology. Compared with traditional mechanical repair technologies, it has the advantages of less structural weight gain, good formability, and high repair efficiency. , In addition, when the composite material is repaired, it is not necessary to open holes to the raw material, and will not cause a new source of stress concentration, thereby effectively improving the fatigue resistance of the structure. Therefore, in recent years, the research on repairing damaged aluminum alloy components with composite materials has attracted the attention of many researchers. [0003] At present,...
Claims
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IPC IPC(8): B23P6/04
CPCB23P6/04
Inventor 柳锦春秦美君赵启林陈力彭永高飞蔡珣李展孙志远
Owner PLA UNIV OF SCI & TECH