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Preparation method of carbon fiber reinforced resin matrix composite rail vehicle head cover

A reinforced resin-based and composite material technology, which is applied in the direction of household components, household appliances, and other household appliances, can solve the problems of mold sealing performance limitations, complex shape of the head cover, and unstable molding quality, so as to ensure the aerodynamic shape and reduce the The effect of process complexity and light weight

Active Publication Date: 2018-06-01
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, rail transit vehicle hoods need to be molded due to their complex shape. Due to the limitation of mold sealing performance, hand lay-up process is generally used in China for molding. Rail transit vehicle hoods are mainly made of hand lay-up glass fiber reinforced resin-based composite materials ( Hereinafter referred to as FRP), this material mainly has disadvantages such as low specific strength, low specific modulus, and unstable molding quality.
It is inconsistent with the current high-speed and energy-saving concepts of rail transit vehicles, so the use of materials is limited to low-speed operating vehicles

Method used

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  • Preparation method of carbon fiber reinforced resin matrix composite rail vehicle head cover
  • Preparation method of carbon fiber reinforced resin matrix composite rail vehicle head cover
  • Preparation method of carbon fiber reinforced resin matrix composite rail vehicle head cover

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preparation example Construction

[0037] The preparation method of carbon fiber reinforced resin-based composite rail vehicle head cover in the present invention specifically comprises the following steps:

[0038] Step (1), using the above-mentioned hood combination mold to carry out layering and curing, the details are as follows:

[0039] (1) The carbon fiber stitch-bonded fabric is used for laying up the hood combination mold, and the specific laying method is as follows: N layers of four-axis carbon fiber stitch-bonded fabric and M layers of three-axis carbon fiber stitch-braided fabric are alternately laid. Layers, the total number of layers is an odd number, the first and last layers are both four-axis carbon fiber stitch-woven fabrics, and the weaving direction of the four-axis carbon fiber stitch-woven fabrics is: 0° / 90° / +45° / -45°, the weaving direction of the triaxial carbon fiber stitch-bonded fabric is: 0° / +45° / -45°.

[0040] Assuming that the total number of layers is 2n+1 layers, taking the n+1...

Embodiment 1

[0048] The example produced is a carbon fiber reinforced resin-based composite material rail transit vehicle head cover, which has many openings and complex shapes. The speed is 180km / h.

[0049] Step 1: Material Selection

[0050] Carbon fiber chooses carbon fiber stitched fabric, and the density of a single layer is 200g / m 2 The resin is epoxy-modified vinyl ester resin, the accelerator is cobalt naphthalate (1305), the catalyst is methyl ethyl ketone peroxide (M50), the flame retardant is organic phosphorus flame retardant, and the mass ratio is 100:0.3:0.3 : 3.5.

[0051] The second step is to use the hood composite mold to lay up layers, and the hood composite mold can be surface treated before laying up layers. A total of 7 layers, along the surface of the combined mold, followed by 1 layer of 4-axis braid, 2 layers of tri-axial braid, 1 layer of 4-axis braid, 2 layers of tri-axial braid, 1 layer of 4-axis braid material, where the triaxial (-45° / +45° / 0°) areal densi...

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Abstract

The invention relates to a forming method of a railway vehicle cowl prepared from a carbon fiber reinforced resin matrix composite material. The forming method comprises the step of forming the vehicle cowl by using a cowl assembling die and specifically comprises the following steps of performing laying and curing forming by adopting a carbon fiber braid; assembling a metal embedded part and carbon fiber composite material reinforcing bars on a cured cowl covering in the cowl assembling die; and then demolding. According to the preparation method disclosed by the invention, by optimizing and innovating the forming die structural design, the laying structural design, the forming process design and the resin formula system design of the railway vehicle cowl, the prepared cowl has excellent integrated properties and has the advantages of low porosity, high specific strength, high specific rigidity, fatigue resistance, good performance stability, light weight and the like; and the integration of the structure and functions is realized, and use requirements of high-speed railway vehicles are met.

Description

technical field [0001] The invention relates to a preparation method of a rail vehicle head cover of a carbon fiber reinforced resin-based composite material, and belongs to the technical field of carbon fiber composite materials. Background technique [0002] Due to its excellent material properties and process characteristics, composite materials are widely used in domestic and foreign military applications: main load-bearing structures such as aircraft wings, fuselages, and central wing boxes, upper stages of launch vehicles, satellite load-bearing tubes, satellite battery arrays, and missile shells. Aerospace structural parts such as bodies; civilian aspects: train shells, concrete pump truck booms, bridge construction, building reinforcement, etc. have been widely used. With the rapid development of my country's military field in recent years, the application of composite materials in the military field has developed rapidly and has become more and more widely used. Ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/36B29C70/38B29C70/54B29K309/04B29L31/30
CPCB29C70/36B29C70/386B29C70/54B29K2309/04B29L2031/3064
Inventor 尤洁许向彦蔡勇杨大鹏路伟
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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