Single-diaphragm preforming method for composite lamination

A composite material lamination and composite material technology, which is applied in the field of single diaphragm preforming of composite material lamination, can solve the problems of cumbersome operation, high cost, unstable quality, etc., and achieves simple operation, good applicability, and good consistency. Effect

Inactive Publication Date: 2020-02-21
HARBIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preforming composite material laminates to solve the technical problems of cumbersome operation, high cost and unstable quality in the current technology

Method used

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  • Single-diaphragm preforming method for composite lamination
  • Single-diaphragm preforming method for composite lamination
  • Single-diaphragm preforming method for composite lamination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment one: if image 3 C-section composite laminate preform shown:

[0035] 1) layup

[0036] Use an automatic tape-laying machine to lay composite material slab laminates 5 according to the lay-up information of structural parts;

[0037] 2) Equipment preparation and tooling preparation

[0038] Place the forming tooling 3 on the vacuum working platform 4 of the preforming equipment, and then place the auxiliary supporting device 2 parallel to the forming tooling 3 on both sides of the forming tooling 3. The height of the forming tooling 3 is 300 mm, and the height of the auxiliary supporting device 2 is 350 mm. The distance between the two is 250mm. Cover auxiliary support unit 2 with airfelt or other soft material. Check whether there are sharp protrusions or depressions on the forming tooling 3 and the vacuum working platform 4, and protect them so as not to tear the silicone rubber film 1 during the preforming process.

[0039] 3) Preheating tooling 3

...

Embodiment 2

[0047] Embodiment two: if Figure 4 Concave cross-section composite laminate preform shown:

[0048] 1) layup

[0049] Use an automatic tape-laying machine to lay composite material slab laminates 5 according to the lay-up information of structural parts;

[0050] 2) Equipment preparation and tooling preparation

[0051] Place the forming tooling 3 on the vacuum working platform 4 of the preforming equipment, and then place the auxiliary supporting device 2 parallel to the forming tooling 3 on both sides of the forming tooling 3. The forming tooling 3 is 200 mm high, and the auxiliary supporting device 2 is 250 mm high. The distance between the two 200mm. Cover auxiliary support unit 2 with airfelt or other soft material. Check whether there are sharp protrusions or depressions on the forming tooling 3 and the vacuum working platform 4, and protect them so as not to tear the silicone rubber film 1 during the preforming process.

[0052] 3) Preheating tooling 3

[0053] Arr...

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Abstract

The invention belongs to the technical field of composite manufacturing, and relates to a single-diaphragm preforming method for a composite lamination. The single-diaphragm preforming method comprises the steps that a silicone rubber membrane (1) is hung over a vacuum work platform (4), and a product forming tool (3) and the composite flat lamination (5) are placed in the center of the vacuum work platform (4); auxiliary supporting devices (2) are placed on the two sides of the product forming tool (3); heating is conducted to raise temperature, wherein the temperature of the composite flat lamination (5) is raised to 55-80 DEG C; after the temperature achieves a balance, vacuum pressure starts to be applied. According to the method, the normal pressure of the composite flat lamination inthe preforming process is balanced by using the auxiliary supporting devices, overlay wrinkles can be effectively prevented, and the method is high in applicability to high forming tools and products. According to the elasticity and weight of silicone rubber itself, precise pressurization control can be achieved through calculation.

Description

technical field [0001] The invention belongs to the composite material manufacturing technology, and relates to a composite material laminated single-diaphragm preforming method. Background technique [0002] The traditional composite material manufacturing process is to complete the paving on the corresponding molding tooling by hand, then paste it into a vacuum bag for packaging, and then enter the autoclave for curing. With the large-scale application of composite materials in aircraft structural parts and the increasing size and complexity of components, the traditional prepreg / autoclave process has limitations such as low production efficiency and unstable molding quality due to manual lay-up. The development of composite material application has led to the rapid development of automatic tape laying technology for composite material parts. However, due to the limitation of the automatic tape laying machine, it cannot manufacture components with large curvature. In ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B11/12B29C70/30B29C70/38B29L31/30
CPCB29B11/12B29C70/30B29C70/386B29L2031/3076
Inventor 王贺赵学莹张体磊王志刚戴东梅宋春杰刘立东宗晓甜佟淑慧
Owner HARBIN
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