Honeycomb-type composite material laminboard and hot press molding method thereof

A composite material and hot pressing forming technology, which is applied in the field of composite material forming, can solve the problems of low internal shear and exploitation performance, poor buckling deformation resistance, uncontrollable molding quality, etc., and achieve high internal shear and exploitation performance, Stable mechanical properties and good buckling deformation resistance

Inactive Publication Date: 2014-12-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the existing hexagonal honeycomb sandwich panels with poor buckling deformation resistance, low internal shear and peeling performance, complicated process and uncontrollable molding quality of the existing honeycomb sandwich panels, the invention provides a kind of honeycomb Composite material sandwich panel and hot pressing forming method thereof

Method used

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  • Honeycomb-type composite material laminboard and hot press molding method thereof
  • Honeycomb-type composite material laminboard and hot press molding method thereof

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Experimental program
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specific Embodiment approach 1

[0022] Specific implementation mode one: as Figure 1~2 As shown, the honeycomb-like composite sandwich panel in this embodiment includes an upper panel 1, a lower panel 2 and a core layer 3, the core layer 3 is fixedly arranged between the upper panel 1 and the lower panel 2, and the core layer 3 is composed of multiple Composed of herringbone units, multiple herringbone units are arranged in a matrix between the upper panel 1 and the lower panel 2, adjacent herringbone units are interwoven horizontally and vertically and fixed as a whole, and the space formed between two adjacent rows of herringbone units Tapered from top to bottom, the space formed by the lower part of each row of herringbone units is gradually expanded from top to bottom, and the upper and lower edges of each row of herringbone units are wavy.

specific Embodiment approach 2

[0023] Specific implementation mode two: as figure 1 As shown, in this embodiment, the space formed between two adjacent rows of herringbone units is consistent with the space formed by the lower part of each row of herringbone units. Such setting can ensure that the prepreg maintains consistent deformation during the folding process. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0024] Specific implementation mode three: as figure 1 As shown, the core layer 3 in this embodiment is bonded between the upper panel 1 and the lower panel 2 , and the core layer 3 is bonded to the upper panel 1 and the lower panel 2 through the adhesive layer 4 . With such a design, compared with riveting, a large number of rivets are saved, and the mechanical properties are improved at the same time. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a honeycomb-type composite material laminboard and a hot press molding method thereof, relates to a laminboard and a hot press molding method thereof, and aims at solving the problems that the conventional hexagonal honeycomb laminboard is low in buckling deformation resistance and low in inner shearing and stripping performance, the conventional hexagonal honeycomb laminboard preparation method is complicated in working procedure and the forming quality is not controllable. According to the device, a sandwich layer consists of a plurality of herringbone units; the adjacent herringbone units are transversely and longitudinally interwoven and fixedly connected to form a whole; a space formed between two adjacent columns of the herringbone units is reduced gradually from top to bottom; a space formed in the lower part of each column of the herringbone units is expanded gradually from top to bottom. The method comprises the steps of 1, cleaning a die; 2, assembling the die; 3, heating the die; 4, paving prepregs; 5, folding the prepregs; 6, snapping down a cover plate; 7, solidifying the prepregs; 8, detaching the die. The honeycomb-type composite material laminboard is used in a main bearing structure of an aircraft.

Description

technical field [0001] The invention relates to a honeycomb-like composite material sandwich panel and a hot pressing forming method thereof, belonging to the technical field of composite material forming. Background technique [0002] At present, the existing closed-cell foam and hexagonal honeycomb core sandwich panels have inevitable shortcomings: (1) The structure is bending-dominant, and the buckling deformation resistance is poor; (2) The bonding area between the panel and the core is small , leading to the reduction of in-plane shear and peeling performance; (3) The preparation process is complicated and the process cost is high. [0003] Existing honeycomb sandwich panels are mostly prepared by NOMEX paper through automatic printing and stretching method. The main preparation process is: "NOMEX" paper→printing glue→lamination→pressing→cutting→stretching→dipping→drying→curing → "NOMEX" honeycomb; aluminum alloy honeycomb can also be prepared by rubber printing stretc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B3/12B29C70/34B29C70/38
Inventor 孙雨果丛立新
Owner HARBIN INST OF TECH
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