Rotation body type composite material component forming method

A composite material component and molding method technology, applied in the field of composite materials, can solve problems such as difficulty in demoulding, difficulty in mold loading and demoulding, and fiber wrinkles, and achieve the effects of ensuring internal molding quality, reducing production costs, and simple operation methods

Inactive Publication Date: 2020-02-21
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the preparation of large-size, high-length-diameter-ratio rotary composite products, the filament winding process has obvious defects, because when using this process to prepare large-size, high-length-diameter ratio rotary composite products, it is necessary to use rigid The mandrel winds the fiber prepreg into a shape of revolution
However, due to the large size and large length-to-diameter ratio of the composite product (the length is more than 5 meters and the diameter is about 200mm), the rigid mandrel used for filament winding does not have sufficient support stiffness, and deformation and bending will occur in the length direction, resulting in During the fiber winding process, the circular runout of the rigid man

Method used

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  • Rotation body type composite material component forming method
  • Rotation body type composite material component forming method
  • Rotation body type composite material component forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The size of the product is: outer diameter 200mm, length 9000mm.

[0054] Prepreg: a prepreg obtained by impregnating a carbon fiber preform with an epoxy resin system glue.

[0055] Prepare the forming tooling of the corresponding size, clean the tooling and apply a release agent on the surface of the tooling, and then transfer the tooling to the clean room for subsequent paving tooling.

[0056] According to the outline projected by the laser projector on the surface of the tooling, the unidirectional tape prepreg is laid layer by layer. Because the size of the tooling is large, and the prepreg is cut small, when laying the unidirectional tape prepreg, the The unidirectional tape prepreg is flattened into a whole sheet, and then laid on the surface of the tooling as a whole, so as to improve the efficiency of laying. During the paving process, vacuum pre-compacting is carried out every time 4 layers of unidirectional tape prepreg are laid. The time of vacuum pre-comp...

Embodiment 2

[0062] The size of the product is: outer diameter 300mm, length 9000mm.

[0063] Prepreg: a prepreg obtained by impregnating a glass fiber preform with a cyanate resin system glue.

[0064] Prepare the forming tooling of the corresponding size, clean the tooling and apply a release agent on the surface of the tooling, and then transfer the tooling to the clean room for subsequent paving tooling.

[0065] According to the outline projected by the laser projector on the surface of the tooling, the unidirectional tape prepreg is laid layer by layer. Because the size of the tooling is large, and the prepreg is cut small, when laying the unidirectional tape prepreg, the The unidirectional tape prepreg is flattened into a whole sheet, and then laid on the surface of the tooling as a whole, so as to improve the efficiency of laying. During the paving process, vacuum pre-compaction is carried out every time three layers of unidirectional tape prepreg are laid. The time of vacuum pre-...

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Abstract

The invention relates to a rotation body type composite material component forming method. The forming method comprises the following steps that the surface of a forming tool is coated with a demoulding material; secondly, manual pavement and pasting of prepreg are conducted on the surface of the forming tool coated with the demoulding material, in the pavement and pasting process, pavement and pasting positioning is conducted, and a vacuum bag pressing method is used for conducting pre-compaction on the paved and pasted prepreg; thirdly, after pavement and pasting are finished, the paved andpasted prepreg is overturned, and rotation type prepreg is formed through overturning; and fourthly, an inflated cylindrical vacuum bag or air bag is used for packaging the rotation type prepreg, thencuring is conducted, and a rotation body type composite material component is obtained. According to the rotation body type composite material component forming method, fiber winding equipment is notneeded, and the production cost is reduced; and material sheet paving and pasting of a rigidity core die are not needed, and fiber wrinkling and deformation caused by the too long rigidity core die are avoided.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a forming method of a revolving body type composite material component. Background technique [0002] Composite gyrostructure is a structural element with reasonable stress form. It has the advantages of strong designability, high specific strength, specific modulus, small linear expansion coefficient and good fatigue resistance. It is widely used in aerospace and Sporting goods and other fields, such as: communication satellite antenna mast, engine bracket, UAV tube beam, fishing rod and racket, etc. The preparation method of the composite rotary structure generally adopts the rigid male mold forming method, the forming process is relatively simple, and the product is formed by the fiber winding process. figure 1 is a rigid mandrel, figure 2 It is a schematic diagram of the female mold tooling for the upper and lower petals. Such as figure 1 As shown, when using...

Claims

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Application Information

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IPC IPC(8): B29C70/34B29C70/44B29C70/54
CPCB29C70/342B29C70/443B29C70/542
Inventor 李阳陈超唐中华张帅张天翔
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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