Apron board of honeycomb sandwich structure and preparation method of apron board

A technology of honeycomb sandwich structure and skirt plate, which is applied in the fields of railway car body parts, railway car body, transportation and packaging, etc., which can solve the problems of high processing difficulty, complex shape and high cost, and achieve easy industrial production and processing technology Simple, Rigid-Enhancing Effect

Inactive Publication Date: 2018-04-20
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both the main board and the bead are mixed with a large amount of carbon fiber prepreg and aramid fiber prepreg, which is expensive and not conducive to mass application.
[0004] Chinese patent CN103661451A discloses a rail vehicle skirt, which fixes the hinge in the chute, and then connects the hinge to the car body beam through a mounting seat with a rotating shaft, but for the convenience of installation and sliding, A large number of horizontal through chutes are set on the back of the skirt plate, the profile is complex and the processing is difficult
When the side beam is drilled to install the hinge, if the installation hole deviates, the hinge hole at the top of the skirt plate will not fit, and the product may be scrapped.
At the same time, the existing rail vehicle skirt boards are mainly aluminum profiles, glass fiber reinforced plastics and aluminum honeycomb panels, which have the characteristics of heavy weight, poor rigidity, difficulty in installation and maintenance, and monotonous shape. The method of preparing the skirt plate with rigidity will be very beneficial to the rapid development of high-speed railway

Method used

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  • Apron board of honeycomb sandwich structure and preparation method of apron board
  • Apron board of honeycomb sandwich structure and preparation method of apron board
  • Apron board of honeycomb sandwich structure and preparation method of apron board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] See attached Figure 1-7, the present embodiment provides a honeycomb sandwich structure apron, the apron includes a skeleton 13 and an apron main board 12, the apron main board 12 is a plate-like structure, and the skeleton 13 is integrally bonded to the apron main board 12 Fix to enhance the rigidity of the skirt board main body 12, and the skeleton 13 and the skirt board main board 12 are integrally fitted and fixed by bonding.

[0047] see image 3 , the top of the skeleton 13 is provided with a U-shaped chute 6, and a hinge 5 is arranged in the U-shaped chute 6. The installation position can be adjusted by sliding. After reaching the installation position, the hinge 5 is fixed with the U-shaped chute 6 by the bolt 4 . In this embodiment, the fixing device adopts the bolt 4, and the hinge 5 is connected with the U-shaped chute 6 through the bolt 4. The movement of the hinge 5 in the chute can be realized by loosening the bolt 4, moving to an appropriate position, ...

Embodiment 2

[0053] This embodiment provides a method for preparing a honeycomb sandwich structure skirt in Embodiment 1, the process flow is as follows Figure 8 As shown, the details are as follows:

[0054] S1. Mold opening: CNC machining skeleton-mainboard assembly mold, the assembly mold is as follows Image 6 As shown, the profile is extruded and welded into a skeleton, the hinge is formed by stamping, a U-shaped chute is opened on the top of the skeleton, and multiple mounting holes are opened on the top and both sides of the skeleton;

[0055] S2. Skin molding: Lay 8 layers of flame-retardant glass fiber-phenolic prepreg on the flat mold (gram weight 350g / m 2 , resin content 47%), and then covered with fluorine tetracloth, vacuum compaction; remove the vacuum bag, and then re-spread 3 layers of flame-retardant glass fiber-phenolic prepreg (gram weight 350g / m 2 , resin content 42%), vacuum compaction; push the flat mold into the autoclave, close the tank door, pressurize to 0.21MP...

Embodiment 3

[0060] This embodiment provides a method for preparing a honeycomb sandwich structure skirt in Embodiment 1, the process flow is as follows Figure 8 As shown, the details are as follows:

[0061] S1. Mold opening: CNC machining skeleton-mainboard assembly mold, the assembly mold is as follows Image 6 As shown, the profile is extruded and welded into a skeleton, the hinge is formed by stamping, a U-shaped chute is opened on the top of the skeleton, and multiple mounting holes are opened on the top and both sides of the skeleton;

[0062] S2. Skin molding: Lay 9 layers of flame-retardant glass fiber-phenolic prepreg (gram weight 400g / m2, resin content 47%) on the flat mold, then pave fluorine tetracloth, vacuum compact; remove the vacuum bag, and then re-spread 4 layers of flame-retardant glass fiber-phenolic prepreg (gram weight 400g / m 2 , resin content 45%), vacuum compaction; push the flat mold into the autoclave, close the tank door, pressurize to 0.23MPa, keep it at 130...

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Abstract

The invention relates to an apron board of a honeycomb sandwich structure. The apron board is installed on an edge beam of a vehicle and comprises a framework and an apron board main board. The apronboard main board is of a platy structure. A U-shaped sliding groove is formed in the top of the framework. Hinges are arranged in the U-shaped sliding groove. The other end of each hinge is fixed to amatching installation seat of the edge beam of a vehicle body. The installation position can be adjusted through sliding motion of the hinges in the U-shaped sliding groove, and when the apron boardreaches the installation position, the hinges are fixed to the U-shaped sliding groove through fixing devices. The invention further provides a preparation method of the apron board of the honeycomb sandwich structure. The method mainly includes the steps of mold opening, skin forming, main board forming and assembling. The apron board main board is enhanced through the adopted aluminum-profile framework, and the rigidity of the apron board is improved; flame retardant glass fiber-phenolic aldehyde prepreg is adopted for forming a skin, the skin is then compounded with an aramid fiber honeycomb to form an apron board body, the weight is low, and the strength is high; and meanwhile under the condition that the deviation of holes punched in the edge beam is small, the installation position can be adjusted through sliding motion of the hinges in the sliding groove.

Description

technical field [0001] The invention belongs to the field of rail vehicle skirt boards, and more specifically relates to a honeycomb sandwich structure skirt board and a preparation method thereof. Background technique [0002] Skirts for rail vehicles are generally installed at the bottom of the equipment compartment to protect the bottom equipment, improve aerodynamics, and reduce equipment noise radiation. The skirt plate not only requires high strength, resistance to vibration and impact, and resistance to opening and closing fatigue, but also requires beautiful appearance and easy installation and maintenance. [0003] Chinese patent CN105383142A discloses a process for making a high-speed rail equipment cabin skirt with composite materials. The equipment cabin skirt is composed of beading around the main board. The main board belongs to the aramid honeycomb sandwich structure, and the bead prepreg bag is pressed. However, both the main board and the bead are mixed wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61D17/04B23P15/00
CPCB61D17/04B23P15/00
Inventor 贾金荣李赛吕保杰高敬民李鸿岩陈磊宫国栋姜其斌
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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