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Composite material grid skin structure part die compression molding forming method

A compression molding and composite material technology, which is applied in the field of composite material molding, can solve the problems of increasing the production cycle of grid structural parts, difficulty in ensuring product quality, and increasing production costs, and achieve uniform skin thickness, small product deformation, and high molding efficiency. high effect

Active Publication Date: 2018-08-17
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This not only greatly increases the production cycle of grid structural parts, but also greatly increases the production cost, and the pressure inside the autoclave is limited by the tank, which should not exceed 1MPa. It is difficult to guarantee product quality for large-scale rib grid structural parts
The composite material grid structure is a large-thickness inner curved rib skin structure, the number is large, the molding cycle is short, and the load-bearing requirements are high. The above three processes are difficult to meet the production requirements of the product, so it must be carried out in the process. Breakthrough, looking for an efficient forming method for grid structural parts

Method used

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  • Composite material grid skin structure part die compression molding forming method
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  • Composite material grid skin structure part die compression molding forming method

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Experimental program
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Embodiment

[0063] Such as figure 1 Shown, product name: operating cover

[0064] Dimensions: the length of the long axis is 510mm, the length of the short axis is 340mm, the cross section of the longitudinal and transverse ribs is trapezoidal, the size is 6mm×11mm×18mm, the size of the outer circumferential ribs is 8mm×13mm×18mm, the thickness of the skin thickening area is 8mm, Skin thickness 4mm.

[0065] Such as figure 2 As shown, the method steps are:

[0066] (1) Manufacture and install forming molds;

[0067] Such as image 3 As shown, the forming mold is first manufactured, and the forming mold includes the lower base plate, the split male module and the upper cover plate, wherein the lower base plate and the upper cover plate are steel molds, and the split male module is an aluminum mold; the split number of the split male module There are 5 petals, the split gap is 0.3mm, a draft angle of 6 degrees is left around the split male module (outer edge of the product), and the g...

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Abstract

The invention relates to a composite material grid skin structure part die compression molding forming method, and belongs to the technical field of composite material forming. A set of control measures suitable for skin grid structure part die compression molding forming technology are found through reasonable rib winding and skin laying technological design, one-time integral forming of a composite material skin grid structure part is achieved, product deformation is small, the thickness is uniform, the operation efficiency is high, and rib winding and skin layer laying for the composite material skin grid structure part can be completed only through one day.

Description

technical field [0001] The invention relates to a compression molding method for a composite material grid skin structure, and belongs to the technical field of composite material molding. Background technique [0002] Composite grid structure is a network rib structure, which is a combination of advanced structural materials and advanced structural forms. Its outstanding features are outstanding structural stability, strong designability, and extremely high specific strength and specific stiffness. It has high efficiency and is widely used in the aerospace field, such as launch vehicle fairing, interstage section, strategic missile hood, interstage section, instrument cabin and other compartments, which use composite material grid structure. [0003] Composite mesh structures have been used in engineering for decades. The earliest composite material grid structure was the iso-grid structure developed by the United States and the former Soviet Union and applied in the aeros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54B29C33/38B29C33/42
CPCB29C33/3892B29C33/42B29C70/34B29C70/54
Inventor 付平俊孟德浩李健芳张娅婷黄智彬李桂洋张霄楠王乐辰
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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