Honeycomb core of aluminum honeycomb panel

aluminum honeycomb panelIt is composed of two very thin aluminum plates sandwiched with a layer of honeycomb core. Because the area of the honeycomb core entity part is very small, the overall quality of the honeycomb panel is very light. In addition, it also has high specific strength and specific stiffness, heat insulation, sound insulation and many other advantages, so it has been widely used in aerospace, trains and ships. In this paper, the preparation technology of aluminum honeycomb panel is reviewed.

Preparation of Honeycomb Core

The shape of the metal honeycomb core is a regular hexagon, diamond, rectangle, equilateral triangle, sine curve and other shapes, because the regular hexagonal honeycomb material saving, simple manufacturing and high structural efficiency and the most widely used. At present, the preparation method of the regular hexagonal honeycomb core mainly includes the stretching method and the forming method.

The stretching method is to first apply glue strips on the materials, then glue the materials together, and finally stretch the laminated and glued materials into honeycomb, then cut it into the required size and put it into use. The honeycomb core prepared by this method will be affected by many factors such as glue width, glue adhesion, basic mechanical and physical properties of the core material, thus causing defects of local insufficient stretching or excessive stretching in the stretching process, in turn, the shape of the honeycomb core is not regular enough, which ultimately affects the stability of product quality, so this method is mainly used in the construction field that does not require high size and strength.

The honeycomb core prepared by forming method is usually to roll or roll the metal honeycomb foil into corrugated corrugated corrugated board, and then use a certain tooling fixture to connect these corrugated boards, commonly used connection methods are cementing and brazing, the honeycomb core prepared by this method, the cell size is accurate, and can be prepared for any specification of honeycomb core. However, if the bonding agent is used to connect each honeycomb core, the connection strength between the core layers will be directly affected by the strength of the bonding agent, so the bonding connection has been slowly replaced by the brazing method. Because brazing can form a strong metallurgical bond between the core layer, the joint strength is high, and the processing efficiency is high, so it is very suitable for the forming and processing of the metal honeycomb core, so it has been widely used in recent years.

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