Corrugated-square cellular composite sandwich structure and preparation method thereof

A technology of sandwich structure and honeycomb structure is applied in the field of corrugated-square honeycomb composite sandwich structure and its preparation. Effect

Inactive Publication Date: 2018-10-16
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of this ordered lattice structure filled ordered lattice structure composite structure used to realize the compounding of lattice materials by adhesive method, but due to the limitation of adhesive strength, the prepared composite Phenomena such as debonding often occur, affecting its overall mechanical properties

Method used

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  • Corrugated-square cellular composite sandwich structure and preparation method thereof
  • Corrugated-square cellular composite sandwich structure and preparation method thereof
  • Corrugated-square cellular composite sandwich structure and preparation method thereof

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preparation example Construction

[0052] The present invention also provides a method for preparing a corrugated-square honeycomb composite sandwich structure. Firstly, groove cutting and welding techniques are used to obtain a square honeycomb structure, and then the corrugated sandwich structure, wire-cut square honeycomb and panels are composited by brazing technology. Weld corrugated-square honeycomb composite sandwich structure, the specific steps are as follows:

[0053] S1, stamping the flattened metal sheet into a metal corrugated core 3 with a platform structure 6 (i.e. trapezoidal structure), and then the metal corrugated core 3, the flattened first metal panel 1 and the second metal panel 2 Wash to remove oil and rust, then dry for later use;

[0054] The metal corrugated core body 3 with trapezoidal structure is prepared by molding or folding technology.

[0055] S2. Using the groove cutting method, first cut a series of grooves on the metal strip with a spacing of 5-10mm, a width of 0.2-1mm, and ...

Embodiment 1

[0067] 1) Firstly, the flattened 0.5mm metal sheet, that is, the stainless steel sheet, is stamped into a metal corrugated core 3 with a platform structure, that is, a trapezoidal structure, and then the metal corrugated core and the flattened metal panel 1 and panel 2 with a thickness of 1 mm Wash with metal cleaner to remove oil and rust and then dry;

[0068] 2) Secondly, wire cutting technology is used to cut a series of grooves with an interval of 5mm on the stainless steel plate with a thickness of 0.2mm. The width of the groove is 0.2mm and the height is 0.5 times the width of the metal strip. It is required to assemble metal strips with grooves together to form a square honeycomb structure, and the gap between the grooves and plates is 3-5 μm, and the gap is evenly coated with mixed brazing paste. Dry it in an oven at 80°C, and then put it into a high-temperature brazing furnace for welding. The vacuum degree is controlled at 10 -2 ~10 -3Pa range, then heat up from ...

Embodiment 2

[0072] 1) First, the flattened 0.5mm metal sheet, that is, the aluminum sheet, is stamped into a metal corrugated core 3 with a platform structure, that is, a trapezoidal structure, and then the metal corrugated core and the flattened metal panel 1 and panel 2 with a thickness of 1 mm Wash with metal cleaner to remove oil and rust and then dry;

[0073] 2) Secondly, using wire cutting technology, first cut a series of grooves with an interval of 5mm on the metal strip with a thickness of 0.2mm, that is, the aluminum plate. The width of the groove is 0.2mm, and the height is 0.5 times the width of the metal strip, and then press The design requires that the metal strips with grooves be assembled together to form a square honeycomb structure, and the gap between the grooves and the plates is 3-5 μm, and the commercially available brazing paste is evenly coated on the gaps. Dry it in an oven at 50°C, and then put it into a high-temperature brazing furnace for welding, and the vac...

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Abstract

The invention discloses a corrugated-square cellular composite sandwich structure and a preparation method thereof. The corrugated-square cellular composite sandwich structure comprises a first metalpanel, a second metal panel and a metal corrugated core body, wherein the metal corrugated core body is arranged between the first metal panel and the second metal panel; the first metal panel and thesecond metal panel are divided into a plurality of holes; each hole is filled with a square cellular structure matched with the hole in size. The preparation method disclosed by the invention realizes preparation of a welded bellows and cellular composite structure and has a broad application prospect in the fields of aeronautics and astronautics, traffic and transportation, machinery manufacturing and military; the weight of a structure can be effectively reduced; after the panels and the corrugated core body are perforated, good sound absorption and noise reducing functions are realized.

Description

technical field [0001] The invention belongs to the technical field of ultra-light porous metal materials, and in particular relates to a corrugated-square honeycomb composite sandwich structure and a preparation method thereof. Background technique [0002] Ultralight porous metal materials are a class of novel multifunctional materials that have emerged with the rapid development of material preparation and machining technology in recent years. This type of material has the characteristics of high porosity, and its microstructure can be divided into two categories: disordered and ordered according to the degree of regularity. The former includes closed-cell foam materials and open-cell foam materials, while the latter includes two-dimensional lattice structures (such as corrugated structure, honeycomb structure, etc.) and three-dimensional truss structures (such as pyramid structures, X-shaped structures, etc.). [0003] At present, metal foam has the characteristics of h...

Claims

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Application Information

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IPC IPC(8): B32B3/28B32B3/12B32B15/01B32B3/24B32B37/00
CPCB32B3/28B32B3/12B32B3/266B32B15/01B32B37/00B32B2307/10
Inventor 金峰张钱城张志家
Owner XI AN JIAOTONG UNIV
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