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Manufacturing method of carbon fiber column lattice truss sandwich structure

A technology of sandwich structure and manufacturing method, which is applied in the field of sandwich structure of composite materials, can solve the problems of structural mechanical performance degradation, complex mold components, etc., and achieve the effects of easy pouring, simple manufacturing method, good geometry and precision

Inactive Publication Date: 2021-06-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned shortcoming of the prior art, provide a kind of manufacturing method of carbon fiber column lattice truss sandwich structure, to solve the heat that the manufacturing method in the prior art produces during processing can cause the mechanical performance of the structure to decline, need Complex Die Assembly Issues

Method used

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  • Manufacturing method of carbon fiber column lattice truss sandwich structure
  • Manufacturing method of carbon fiber column lattice truss sandwich structure
  • Manufacturing method of carbon fiber column lattice truss sandwich structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Its structure is as figure 1 As shown, the sandwich layer is a core topology composed of a vertical columnar truss core grid structure. Its preparation method is as follows:

[0054] Place the Himalayan salt block used as a sacrificial mold on a rectangular wooden pad, and process it into a 300×200×37 mm cuboid with a CNC milling machine; drill bits with diameters of 2, 3, and 4 mm are selected on the CNC machine tool for drilling operations; The centerline distance between the columns is 15 mm; the dry carbon fiber fabric prefabricated body is cut into a size larger than the salt block, covered on the upper and lower surfaces of the salt block respectively and fixed with adhesive tape; Immerse one end of the bundle in distilled water, then pull the excess water through the small holes in the rubber membrane, and stitch the continuous carbon fiber tow through the holes in the salt block from the carbon fiber fabric on one side to the carbon fiber fabric on the other si...

Embodiment 2

[0056] Its structure is as figure 2 As shown, the sandwich layer is a core topology composed of a pyramid grid truss core grid structure. Its preparation method is as follows:

[0057] Place the Himalayan salt block used as a sacrificial mold on a rectangular wooden pad, and process it into a 300×200×37mm cuboid with a CNC milling machine; design a jig to guide the oblique drilling operation, the jig is placed on the salt block, and then used separately 2, 3, and 4 mm drill bits are manually drilled to form a pyramid structure at 45 degrees; the dry carbon fiber fabric prefabricated body is cut into a size larger than the salt block, and the upper and lower surfaces of the salt block are respectively covered and fixed with adhesive tape; Before fiber sewing, immerse one end of the dry fiber tow in distilled water, then pull out the excess water through the small hole in the rubber membrane, and stitch the continuous carbon fiber tow through the hole of the salt block from on...

Embodiment 3

[0059] Its structure is as image 3 As shown, the sandwich layer is a core topology consisting of a pyramidal grid truss core grid containing an additional vertical column structure. Its preparation method is as follows:

[0060] Place the Himalayan salt block used as a sacrificial mold on a rectangular wooden pad, and process it into a 300×200×37 mm cuboid with a CNC milling machine; design a jig to guide the oblique drilling operation, and the jig is placed on the salt block for use 2,3 , a 4 mm drill bit is manually drilled to form a pyramid structure at 45 degrees, and then a drill bit with a diameter of 2, 3, and 4 mm is used to drill a central vertical hole; the dry carbon fiber fabric prefabricated body is cut to a size larger than the salt block, Cover the upper and lower surfaces of the salt block respectively and fix them with adhesive tape; before the fiber is stitched, one end of the dry fiber tow is immersed in distilled water, and then the excess water is pulled...

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Abstract

The invention discloses a manufacturing method of a carbon fiber column lattice truss sandwich structure. The manufacturing method comprises the following steps that 1, a salt block serving as a sacrificial mold is drilled; 2, carbon fiber fabric preforms are placed on the upper side and the lower side of the sacrificial mold; 3, a continuous carbon fiber tow penetrates through holes of the sacrificial mold to sew the upper carbon fiber fabric preform and the lower carbon fiber fabric preform together; 4, a seamed carbon fiber structure component is poured by a vacuum-assisted resin pouring process; and 5, after curing, a cured plate is put into warm water, and a salt block mold is completely dissolved to obtain a carbon fiber column lattice truss sandwich structure composite material. The manufacturing method is low in cost; and a panel and a grid truss core are not bonded in the one-time sewing process, so that a weak interface between the panel and the grid truss core is prevented, and a column lattice truss sandwich structure with a complex shape can be manufactured. According to the manufacturing method, the possibility is provided for manufacturing the carbon fiber column lattice truss sandwich structure composite material with the complex shape, the manufacturing method is simple, the cost is lower, and the lattice core structure with any topology can be obtained.

Description

【Technical field】 [0001] The invention belongs to the field of sandwich structures of composite materials, and in particular relates to a method for manufacturing a carbon fiber column lattice truss sandwich structure. 【Background technique】 [0002] In recent years, with the rapid progress of productivity, the requirements for lightweight materials are getting higher and higher. Carbon fiber column truss sandwich structure composite materials are a mixture of fiber composite materials and optimized lattice topology. Due to the high specific performance of carbon fiber materials, It is lighter than the metal column lattice truss sandwich structure. However, its stiffness and strength are significantly higher than carbon foam and aluminum honeycomb at the same relative density, and it has been widely used. [0003] At present, the manufacturing methods of carbon fiber column lattice truss sandwich structure composite materials include winding method, buckle method, thermal c...

Claims

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Application Information

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IPC IPC(8): B29C70/36B29C70/54
CPCB29C70/36B29C70/54
Inventor 周晋凯纳·苏布拉曼尼杨官忠伟宋心仪卫斯理·詹姆斯·坎特威尔
Owner XI AN JIAOTONG UNIV
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