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Method for producing a concave-shaped in particular u-shaped piece in a composite material and device for carrying out the same

A composite material, concave surface technology, applied in the field of manufacturing concave composite material parts, can solve the problems of unsatisfactory results and increased tool costs

Inactive Publication Date: 2011-10-12
AIRBUS OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] Although this mode of operation provides better control of the thickness, the results are not satisfactory because the counter-mold 32 used must be temperature-resistant, such as a low-carbon material counter-mold, so that the part can Smooth demoulding, which will greatly increase the cost of the tool

Method used

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  • Method for producing a concave-shaped in particular u-shaped piece in a composite material and device for carrying out the same
  • Method for producing a concave-shaped in particular u-shaped piece in a composite material and device for carrying out the same
  • Method for producing a concave-shaped in particular u-shaped piece in a composite material and device for carrying out the same

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Embodiment Construction

[0031] Figure 4F Designated at 50 is at least one fiber preform to be impregnated in a matrix, such as a resin, which after polymerization results in a piece of composite material constituting an aircraft component. Of course, the inventive method is not limited to the field of aviation.

[0032] The invention relates primarily to a prefabricated element with a U-shaped cross-section, for making, for example, stringers.

[0033] Of course, the present invention is not limited to this cross-section, and the cross-section may be V-shaped or concave.

[0034] In the following description, the so-called inner surface, the concave surface, that is, the bottom of the U-shaped section and the faces of the arms and the bottom in the area formed between the U-shaped arms; the so-called outer surface is the opposite. face.

[0035] According to various variants, the prefabricated part is obtained by stacking plies of fibres, or joining several fibreboards, the fibers being arranged ...

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Abstract

The invention relates to a method fort producing a piece in a composite material with a hollow form and comprising a preform of fibres (50) embedded in a matrix, comprising placing said preform (50) in a first housing (64) defined by a mould (52) in contact with the surface of the piece to be produced outside the hollow form and a counter mould (54) in contact with the surface of the piece for production inside the hollow form, characterised in using a mould (52) in at least two parts (52.1, 52.2) and means (78) for controlling the separation of said at least two parts (52.1, 52.2) which are connected due to the phenomenon of dilatation on polymerisation.

Description

technical field [0001] The invention relates to a method for manufacturing a concave composite material part, in particular to a longitudinal beam with a U-shaped section. At the same time it also relates to a device for carrying out the method, which, on the one hand, sprays or impregnates the fiber preform with a substance suitable for forming the matrix, so as to ensure a uniform impregnation; best dimensional accuracy. Background technique [0002] Composite finished parts include a matrix, such as a resin matrix reinforced with fibres. According to a widely used embodiment, the fibers are present in the form of a fiber preform consisting of one or several woven or unwoven fiber folds. [0003] Before the polymerization stage, the substances that make up the matrix should impregnate this preform in a homogeneous manner, giving it optimal properties. [0004] According to the first operation mode called spraying, the substance constituting the matrix is ​​usually resin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/46B29C33/48
CPCB29C33/48B29C70/46
Inventor 菲利普·布洛塞巴斯蒂安·戈耶马蒂厄·拉农扎尔
Owner AIRBUS OPERATIONS GMBH