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Curved surface metal honeycomb rapid forming method based on paper-cut structure

A technology of metal honeycomb and forming method, which is applied in the field of advanced intelligent structures, can solve the problems of low preparation efficiency, high requirements for glue adhesion, and great influence on the structural size and mechanical stability of the metal honeycomb core material, and achieve mechanical properties The effects of stability, light metal honeycomb, and large lateral elastic deformation range

Pending Publication Date: 2022-07-22
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The forming method needs to first press the metal sheet strip into a corrugated shape, and then weld or glue it into a honeycomb shape, and the preparation efficiency is low; while the pre-stretching method has a low impact on the glue width, glue material composition ratio, and glue adhesion. The requirements are high, and these factors have a great influence on the structural size and mechanical stability of the metal honeycomb core material

Method used

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  • Curved surface metal honeycomb rapid forming method based on paper-cut structure
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  • Curved surface metal honeycomb rapid forming method based on paper-cut structure

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Embodiment 1

[0025] Embodiment 1 of the present invention is a kraft paper honeycomb based on a kirigami structure that is rapidly formed by this method.

[0026] The steps of this embodiment are as follows:

[0027] Step 1: Take kraft paper with a thickness of 115 microns, a width of 120 mm and a length of 180 mm;

[0028] Step 2: Process the surface of the kraft paper. The parameters of the incision in the processed paper-cut section are: the incision length is 12.6 mm, the width is 0.3 mm, the two ends of the incision are rounded, the corner radius is 0.15 mm, the incision spacing is 4.5 mm, and the vertical line spacing is 3 mm, the number of incision rows is 21, and the adjacent rows are staggered, and the incision gap is facing the center of the incision in the adjacent row;

[0029] Step 3: Clamp the upper and lower ends of the processed kraft paper with splints so that the force is uniform during stretching (115 microns is within the clamping range of the stretching clamp, and ord...

Embodiment 2

[0031] Embodiment 2 of the present invention is a kind of stainless steel ultra-thin strip metal honeycomb based on kirigami structure (the shape of the metal honeycomb is hexagon, but the incision spacing is very small (2mm), which makes the formed hexagonal The upper and lower sides of the shape are small (2mm) and look like a quadrangle).

[0032] The steps of this embodiment are as follows:

[0033] Step 1: Take a stainless steel ultra-thin strip with a thickness of 300 microns, a width of 120 mm and a length of 200 mm;

[0034] Step 2: Perform incision processing on its surface (the cutting method used in Example 2 is chemical etching, with excellent effect). The fillet radius is 0.15mm, the incision spacing is 2 mm, the longitudinal row spacing is 3 mm, the number of incision rows is 21, and the adjacent rows are staggered, and the incision gap is directly opposite to the center of the incision in the adjacent row;

[0035]Step 3: The upper and lower ends of the treate...

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Abstract

The invention discloses a rapid forming method for a curved surface metal honeycomb based on a paper-cut structure. The method comprises the steps of selection and determination of the outer contour of a thin-wall material, processing of honeycomb unit forming notches and stretching and unfolding forming. Based on a traditional paper cutting process in China, a thin-wall material with a certain size is processed and cut according to a specific mode and in a specific direction and then is stretched and unfolded to present a polygonal honeycomb unit shape; the units are connected through the honeycomb materials, gluing is not needed, and the structure is particularly suitable for a curved surface structure. The method has the characteristics of simple processing operation, fast honeycomb forming and low processing cost, and compared with the traditional honeycomb forming process, the method can realize automatic production and greatly improve the honeycomb forming production efficiency; the formed metal honeycomb is light in weight, large in elastic deformation range and better in oblique force bearing effect within the range of + / -30 degrees perpendicular to the honeycomb panel, and is expected to be applied to links such as collision energy absorption, fire prevention and heat insulation, material reduction and weight reduction of devices such as building construction, logistics transportation, traffic equipment and aerospace.

Description

technical field [0001] The invention relates to the technical field of advanced intelligent structures, in particular to a method for rapid prototyping of curved metal honeycombs based on a kirigami structure. Background technique [0002] The metal honeycomb structure is a proper term because of its high wind pressure resistance, shock absorption, sound insulation, heat preservation, flame retardant and high specific strength and specific stiffness (specific strength and specific stiffness are proper terms: specific strength is the tensile strength of the material and the apparent density of the material. The legal unit is N / tex. The higher the specific strength, the lighter the material used to achieve the corresponding strength. The specific stiffness refers to the ratio of the elastic modulus of the material to its density, also known as "specific modulus". It is one of the important requirements for materials in structural design, especially aviation and aerospace struc...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 王菡李宁李志强王峦孟義然
Owner TAIYUAN UNIV OF TECH