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Method for automatically laying tapes to manufacture composite material beam

A composite material and molding method technology, applied in the field of composite material molding, can solve problems such as impossibility, affecting product quality, and easy air trapping, and achieve the effects of avoiding inclusions, solving automated production problems, and reducing the number of operators

Active Publication Date: 2014-05-28
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the automatic tape laying technology has its limitations for components with complex shapes and large curvatures, such as beam-rib structures. The tape laying head will interfere with the tooling, resulting in the failure of compaction of the material tape and even the failure of automatic tape laying.
The existing thermal diaphragm forming method is to preform the blank after heating and softening. This process requires large-scale heating equipment, which increases the production cost, and has high requirements on the manufacturability of the prepreg. If it is not handled properly, it will easily wrap gas, thereby affecting product quality

Method used

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  • Method for automatically laying tapes to manufacture composite material beam
  • Method for automatically laying tapes to manufacture composite material beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this example, using figure 1 According to the profile of the ∏-beam and the used diaphragm thickness of 1.2mm, the lay-up is unfolded into a plane. The T800 / BA9918 prepreg produced by AVIC Composite Materials Co., Ltd. (thickness of single layer is 0.19mm, width of strip is 75mm) is selected, and the layup is set to be 1 group every 6 layers. The laminated blank is pressed up and down by a diaphragm with the same size as the blank. The diaphragm is made of silicone rubber and A4000 isolation film produced by AIRTECH. The upper surface is made of silicone rubber, the lower surface is made of A4000 isolation film, and then vacuum bagged and compacted. Use the corresponding positioning device on the tooling and the blank to position the blank on the forming tooling. The vacuum bag-encapsulated blank and the forming tool are packaged as a whole, and the vacuum is assisted to attach the blank and the forming tool in place. After removing the vacuum bag, put the blank b...

Embodiment 2

[0029] In this example, using figure 1 According to the profile of the ∏-beam and the used diaphragm thickness of 1.2mm, the lay-up is unfolded into a plane. Choose T800 / 977-2 prepreg produced by CYTEC Company (single-layer thickness is 0.19mm, tape width 150mm), and the layup is set to be 1 group every 4 layers. The laminated blank is pressed up and down by a diaphragm with the same size as the blank. The diaphragm is made of silicone rubber and A4000 isolation film produced by AIRTECH. The upper surface is made of silicone rubber, the lower surface is made of A4000 isolation film, and then vacuum bagged and compacted. Use the corresponding positioning device on the tooling and the blank to position the blank on the forming tooling. The vacuum bag-encapsulated blank and the forming tool are packaged as a whole, and the vacuum is assisted to attach the blank and the forming tool in place. After removing the vacuum bag, put the blank back into the forming tooling, and contin...

Embodiment 3

[0031] In this example, using figure 2 According to the profile of the J-beam and the used diaphragm thickness of 1.2mm, the lay-up is unfolded into a plane. The CCF300 / BA9916-II high-temperature epoxy prepreg (single-layer thickness: 0.125mm) produced by AVIC Composite Materials Co., Ltd. was selected, and the lay-up was set to 8 layers as a group. The laminated blank is pressed up and down by a diaphragm with the same size as the blank. The diaphragm is made of silicone rubber and A4000 isolation film produced by AIRTECH. The upper surface is made of silicone rubber, the lower surface is made of A4000 isolation film, and then vacuum bagged and compacted. Use the corresponding positioning device on the tooling and the blank to position the blank on the forming tooling. The vacuum bag-encapsulated blank and the forming tool are packaged as a whole, and the vacuum is assisted to attach the blank and the forming tool in place. After removing the vacuum bag, put the blank bac...

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Abstract

The invention belongs to the technical field of composite material formation, and relates to a method for automatically laying tapes to manufacture a composite material beam. The method comprises the following steps: unfolding spreading layers to plane spreading layers on which a tape laying machine is the easiest to operate via unfolding beam spreading layers, laying up the spreading layers in groups, in batches and in sequence via calculating fiber angles and designing tape laying routes by a computer, and then using technological means such as vacuum auxiliary formation to put the spreading layers back onto the forming tooling of the beam. Therefore, the automatic tape laying manufacture of the composite material beam is realized, the manufacturing cost is greatly reduced, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of composite material forming, and relates to a method suitable for automatic tape laying to manufacture composite material beams. Background technique [0002] With the development of aviation manufacturing technology, the automatic production of large composite components has become higher and higher, and automatic tape laying technology has been widely used in the composite material manufacturing of large passenger aircraft. The composite material components produced by automatic tape laying technology have high precision and good molding quality, which can effectively avoid defects such as artificial inclusions and pollution, and can effectively reduce the number of operators and labor costs. It is a mainstream in the manufacture of large composite material components. trend. [0003] However, the automatic tape laying technology has its limitations for components with complex shapes and large curvature...

Claims

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Application Information

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IPC IPC(8): B29C70/38
CPCB29C70/386
Inventor 荀国立徐洪波邱启艳周晓芹
Owner AVIC COMPOSITES
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