Honeycomb core sandwich and preparation method thereof

Abstract

The invention discloses a honeycomb core sandwich and a preparation method thereof. The method includes the steps that firstly, an STL-format three-dimensional honeycomb core sandwich model file capable of being recognized by a 3D printer is provided, and at least part of the wall thickness of a honeycomb unit is gradually increased towards two ends of the honeycomb unit from the center of the honeycomb unit; secondly, the printing process of the three-dimensional honeycomb core sandwich model file is optimized, supporting of a cantilever part is added, and then, digitalized cross section slicing is performed so that slicing data of a three-dimensional honeycomb core sandwich model can be conveniently obtained; and thirdly, the slicing data of the three-dimensional honeycomb core sandwich model can be printed layer by layer through the 3D printer so that the honeycomb core sandwich can be obtained. By means of the method, the production efficiency of the honeycomb core sandwich can be remarkably improved, the adhesion performance of the honeycomb core sandwich and a panel is substantially improved, and the honeycomb core sandwich of the curved surface structure can be prepared.

Description

technical field [0001] The invention belongs to the field of material technology, in particular, the invention relates to a honeycomb sandwich core and a preparation method thereof. Background technique [0002] Honeycomb sandwich panel is currently the most mature sandwich panel. It has the characteristics of light weight, high strength, heat insulation, sound insulation, compression resistance and bending resistance. It is widely used in aerospace, ships, high-speed trains, fan blades, civil engineering, etc. and other fields. Its honeycomb core is usually divided into thermosetting core and thermoplastic core. Thermoset cores are usually made by bonded stretching or corrugated bonding. The thermoplastic core is usually formed by heat fusion after extrusion. However, the manufacturing process of the existing honeycomb sandwich is complicated, and the honeycomb sandwich is usually a plane sandwich, which is difficult to meet the requirements of the curved surface structu...

AI Technical Summary

Problems solved by technology

However, the manufacturing process of the existing honeycomb sandwich is complicated, and the honeycomb sandwich is usually a plane sandwich, which is difficult to meet the requirements of the curved surface structure

In addition, the existing honeycomb sandwich is generally composed of cells of the same size, which is difficult to adapt to the variable thickness and variable size structure produced by the optimization of the honeycomb structure.

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