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Manufacturing method of woven composite material pipe fitting with variable stiffness characteristic

A composite material tube and composite material technology, applied in the application field of braided composite materials, can solve the problem of not many designs, and achieve the effects of good structural integrity, simple operation and strong structural designability

Active Publication Date: 2021-12-03
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the design of braided composite pipes is still at the stage of braiding angle and yarn number, and there are not many designs for braided composite pipes with variable stiffness.

Method used

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  • Manufacturing method of woven composite material pipe fitting with variable stiffness characteristic
  • Manufacturing method of woven composite material pipe fitting with variable stiffness characteristic
  • Manufacturing method of woven composite material pipe fitting with variable stiffness characteristic

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Embodiment Construction

[0041] Please refer to the attached figure 1 to attach Figure 5 As shown, the present invention is a method for manufacturing braided composite pipe fittings with variable stiffness characteristics. The equipment required for this method includes a wax casting machine 4, a wax casting mold 7, a metal pipe 6, an annular braiding machine 14, a manipulator, and a punching machine. device, vacuum tank 26, vacuum pump 28, balance, oven; the materials used include wax 8, carbon fiber bundles, epoxy resin, curing agent, vacuum bag 23, diversion net 19, release cloth 18, conduits 5, 9, 21, 24, 25, beaker I10, beaker II 20, beaker III27.

[0042] The manufacturing method of the braided composite material pipe fitting with variable stiffness features of the present invention is divided into two stages, one is the weaving stage, and the other is the curing stage.

[0043] Wherein, the weaving stage includes the following process steps:

[0044] 1-1), prepare the mandrel 16: put the m...

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Abstract

The invention relates to a manufacturing method of a woven composite material pipe fitting with a variable stiffness characteristic. The manufacturing method comprises a weaving stage and a curing stage; the weaving stage comprises the steps that a mandrel is prepared, wherein the length and the extraction speed of a mandrel convergence area are calculated, inputting a calculation result into a control unit of an annular knitting machine, and starting a program for knitting to form a knitted fabric; and the curing stage process comprises the following steps of punching a demolding cloth; wrapping the demolding cloth on the knitted fabric, and then wrapping a flow guide net on the outer side of the knitted fabric; placing the knitted fabric in a vacuum bag; weighing epoxy resin and a curing agent, putting the epoxy resin and the curing agent into a beaker II, uniformly stirring until the liquid is transparent, putting the beaker II into a vacuum tank, and extracting bubbles; starting a vacuum pump, and enabling the blended solution to flow into the vacuum bag from the beaker II; performing baking; taking out and removing the vacuum bag, the flow guide net and the demolding cloth after baking; and baking again to obtain a final finished product. The woven composite material pipe prepared by the invention is good in structural integrity, and is integrally formed without seams; and the structure designability is high, and parameters such as knitting angles and yarn specifications can be changed.

Description

【Technical field】 [0001] The invention relates to a method for manufacturing a composite material pipe fitting, in particular to a method for manufacturing a braided composite material pipe fitting with variable stiffness characteristics, and belongs to the technical field of braided composite material application. 【Background technique】 [0002] Thin-walled tubing, due to its ability to absorb kinetic energy in a controlled manner, is often used as an energy-absorbing structure to protect vehicle occupants during a crash. Carbon fiber reinforced composite materials have a series of advantages such as high strength, high modulus, impact resistance, fatigue resistance, corrosion resistance, and good shock absorption performance, which are of great significance for improving structural performance and reducing structural weight. The designability of composite materials also enables them to better replace metal materials. [0003] Most of the existing composite pipe fittings a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D23/00
CPCB29D23/001
Inventor 潘忠祥乔凤欧阳威豪吴震宇
Owner ZHEJIANG SCI-TECH UNIV
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