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Honeycomb-corrugated composite lattice sandwich cylindrical shell and preparation method thereof

A technology of composite lattice and cylindrical shell, applied in the field of honeycomb-corrugated composite lattice sandwich cylindrical shell and its preparation, can solve the problems of weak energy absorption capacity, elastic-plastic buckling instability, limited application range, etc. Sound frequency range, the effect of good sound absorption performance

Inactive Publication Date: 2017-11-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Corrugated plates and honeycomb materials, which are more common in porous materials, have been widely used at present, but the relative density of the current aluminum honeycomb is usually less than 0.08, because when the relative density is further increased, the connection interface between the honeycomb core and the panel is prone to detachment. sticky failure
The limitation of relative density limits the rigidity, strength and energy absorption capacity of aluminum honeycomb, which in turn limits its application range
The corrugated structure also has its own disadvantages: as the core of the sandwich structure, the corrugated plate is prone to elastic-plastic buckling instability under shear and bending loads, and when the load reaches the peak value, the load drops rapidly, resulting in its energy absorption capacity being significantly weaker than that of foam and honeycomb material

Method used

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  • Honeycomb-corrugated composite lattice sandwich cylindrical shell and preparation method thereof
  • Honeycomb-corrugated composite lattice sandwich cylindrical shell and preparation method thereof
  • Honeycomb-corrugated composite lattice sandwich cylindrical shell and preparation method thereof

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preparation example Construction

[0041]The invention also discloses a method for preparing a honeycomb-corrugated composite lattice sandwich cylindrical shell, the specific steps are as follows:

[0042] S1. Cut the aluminum honeycomb into a rectangular structure by wire cutting;

[0043] S2. Laser drilling technology is used to drill micro-perforations on the flat metal plate, and the metal plate is made into a micro-perforated metal corrugated plate by molding or bending technology;

[0044] S3. After cleaning the micro-perforated metal corrugated plate prepared in step S2 to remove oil and rust, solidify it on the ring-shaped corrugated mold, connect it into one, and demould to obtain the micro-perforated ring-shaped corrugated core;

[0045] S4. Cut the flattened metal sheet, remove oil and rust through surface treatment, use a metal cylinder with a diameter of 114-133mm as a mold, cover the metal sheet on it and connect it into one, and demould to make an outer circle A barrel and an inner cylinder, bef...

Embodiment 1

[0049] 1) Cut the cleaned hexagonal aluminum honeycomb into rectangular structures.

[0050] 2) Using laser drilling technology to drill micro-perforations on the flattened 0.2mm thick 1060 aluminum plate, the diameter of the micro-perforations is 0.5mm. The metal sheet is then made into a micro-perforated metal corrugated sheet by molding technology;

[0051] 3) After cleaning the micro-perforated metal corrugated plate with a metal cleaning agent in an ultrasonic cleaning machine to remove oil and rust, solidify it on the ring corrugated mold, and evenly coat a layer of adhesive on the corrugated joint, and place it at 40-60 °C Curing in an oven, demoulding to obtain an annular metal corrugated core structure.

[0052] The adhesive used is Loctite E-120HP epoxy glue.

[0053] 4) Cut the flattened 0.5mm thick 1060 aluminum plate into a rectangular structure, and add metal cleaning agent in an ultrasonic cleaning machine to clean and remove oil and rust. Laser drilling tech...

Embodiment 2

[0061] 1) Cut the cleaned hexagonal aluminum honeycomb into rectangular structures.

[0062] 2) Using laser drilling technology to drill micro-perforations on the flattened 0.2mm thick 304 stainless steel plate, the diameter of the micro-perforations is 0.5mm. The metal sheet is then made into a micro-perforated metal corrugated sheet by molding technology;

[0063] 3) After cleaning the micro-perforated metal corrugated plate with a metal cleaning agent in an ultrasonic cleaning machine to remove oil and rust, solidify it on the ring corrugated mold, and place a layer of high-silica glass fiber tape between the ring corrugated and the mold to Prevent the corrugated core from welding with the mold. Apply NiCr25P10 brazing paste evenly on the corrugated joint, dry it in an oven at 40-50°C, then put the above structure into a high-temperature brazing furnace for welding, and slowly cool to room temperature after welding, then disassemble the mold and demould An annular metal c...

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Abstract

The invention discloses a honeycomb-corrugated composite lattice sandwich cylindrical shell and a preparation method thereof. The method comprises the following steps: cutting an aluminum honeycomb into a rectangular structure by adopting wire-electrode cutting; preparing a micro-punched corrugated plate by adopting mold-pressing, bending and laser boring technologies; fixedly forming the micro-punched corrugated plate on an annular corrugated mould, thereby acquiring a micro-punched annular metal corrugated core; respectively preparing an outer drum and a micro-punched inner drum on a metallic drum mould; connecting the micro-punched core with the micro-punched inner drum and outer drum in the manner of gluing or welding; and filling a corrugated channel with the aluminum honeycomb for gluing, thereby acquiring a multifunctional micro-punched honeycomb-corrugated composite lattice sandwich cylindrical shell. The structure integrates light weight, load bearing, energy absorption and sound wave absorption; the preparation technology is mature; and the honeycomb-corrugated composite lattice sandwich cylindrical shell has wide market prospect in the fields of civil use and military use with active demand on load bearing, sound absorption and noise lowering.

Description

technical field [0001] The invention belongs to the technical field of design and preparation of honeycomb-filled corrugated sandwich shells, and in particular relates to a honeycomb-corrugated composite lattice sandwich cylindrical shell and a preparation method thereof. Background technique [0002] Due to its advantages of high specific energy absorption (~3×104Nm / kg) and high volumetric efficiency (0.7~0.8), thin-walled cylindrical shells are widely used in many important civil and national defense industries such as chemical industry, aerospace, transportation, and nuclear energy equipment. . In this field, in order to ensure sufficient safety and improve energy utilization efficiency, in addition to strict requirements on quality, structural load-bearing and impact resistance, noise control has always required attention. Lightweight porous materials have great application potential in this field due to their excellent structural properties such as light weight, high s...

Claims

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Application Information

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IPC IPC(8): B32B1/08B32B3/24B32B3/12B32B15/18B32B15/20B32B37/02B32B38/04
CPCB32B1/08B32B3/12B32B3/266B32B15/18B32B15/20B32B37/02B32B38/04
Inventor 韩宾苏鹏博杨茂张钱城卢天健金峰
Owner XI AN JIAOTONG UNIV
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