RU2505409C2 - Method of producing reinforced shell from polymer composites - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: separation layer is laid onto mandrel. Said separation layer is laid section-by-section in pre-making the sections from anti-adhesion resilient material with metal inserts. Said metal inserts have holes for attaching said sections to the mandrel by fastening mounts. Said sections are fitted on said mandrel after prepreg work pieces laid thereon manually or with the help of automated placer in compliance with overlapping pattern of reinforcement. Shell skin layers, sawing block, drain layers and vacuum bag are laid at aforesaid layers. After thermal treatment, made article is withdrawn from mandrel and sections are detached.

EFFECT: higher reliability, lower costs and labor input.

4 dwg

Description

The invention relates to the field of engineering and can be used to create structures used in space and aviation technology, operating under high loads.

A known method of manufacturing elements of an airplane glider from polymer composite materials according to patent RU No. 2312790 dated 06/14/2006, IPC B64C 3/20 (2006), B32B 1/00 (2006), B32B 37/00 (2006).

A method of manufacturing aircraft glider elements from polymer composite materials consists in laying a separation layer on a mandrel, wrapping spiral and annular layers of power elements, crimping a cladding of heat-shrink material, heat treating, removing it from the mandrel and removing the cladding and separation layer. The separation layer is stacked in sections, pre-manufacturing sections of the release of elastic material, performing in the sections of the gap. Sections are laid with the formation of these slots along the entire separation layer spiral both directions and annular grooves. Orient and fix the section on the mandrel mounting and installation elements. The grooves are filled with a polymer composite material, for example, a bundle of unidirectional carbon fibers impregnated with a polymer binder.

The disadvantage of this method is the lack of the possibility of implementing cross-reinforcement schemes for thicknesses using the method of winding a unidirectional filler impregnated with a polymer binder. In addition, the separation layer sections are made only of elastic material, and, as a consequence, the high cost of technological equipment, the need to create a higher external pressure to provide the required geometric dimensions and shape of the structure, the increased complexity of the assembly of technological equipment, as to ensure the necessary accuracy of the arrangement of structural elements requires more structurally complex fastening and installation elements.

The known method as the closest in technical essence and the achieved result is selected as a prototype.

The technical problem to which the claimed invention is directed is to ensure the implementation of a reinforced shell of polymer composite materials of various reinforcement schemes (in particular, a cross reinforcement scheme) in the structure, to increase the reliability of the structure, reduce the cost of technological equipment, as well as the complexity of their assembly.

The technical result that can be achieved by solving the technical problem is to increase the reliability of the structure through the use of various reinforcement schemes, as well as to reduce the cost of technological equipment, the complexity of the assembly due to the inclusion of metal inserts in the design of sections of elastic material.

The problem with the achievement of the technical result is solved in that the method of manufacturing a reinforced shell of polymer composite materials, including the use of the mandrel and sections of the separation layer of elastic material, has the following distinctive features:

- sections of the separation layer made of release adhesive elastic material, supplemented with metal inserts - an essential sign, aimed at solving the problem with achieving a technical result - to reduce the cost of technological equipment by reducing the amount of elastic material, to improve the accuracy of installation of sections on the mandrel due to stiffness of metal liners, to reduce the complexity of the assembly of technological equipment due to the simplification of the design of the crepe mounting elements to reduce external pressure to ensure the required geometric dimensions and shape of the structure;

- the sections are installed on the mandrel after laying (manually or using an automated stacker) on them prepreg blanks - an essential sign, aimed at solving the problem with the achievement of the technical result - to improve the reliability of the structure due to the implementation of any reinforcement scheme (including cross Schemes) according to the thickness of the reinforcement and casing.

These distinctive features are significant, since each individually and all together are aimed at solving the problem with the achievement of a technical result. The use of a single set of essential distinguishing features in the known technical solution is not found, which characterizes the conformity of the technical solution to the criterion of "novelty."

A single set of new essential features with common known provides a solution to the problem with the achievement of a technical result and characterizes the proposed technical solutions by significant differences compared with the prior art and the analogue. These technical solutions are the result of research and experimental work to improve the reliability of the work of reinforced shells of rotation without using known design solutions, recommendations, materials and are non-obvious, which indicates their compliance with the criterion of "inventive step".

The invention is illustrated by drawings, where figure 1 shows a General view in section of a mandrel with sections installed on it, the main structural elements of the reinforced shell, tsulag, drainage layer and a vacuum bag; figure 2 is a cross section of a section with layers of reinforcement and sheathing laid on it.

A method of manufacturing a reinforced shell from a polymer composite material, in which sections 1, which include metal inserts 2, are laid (manually or by an automated stacker) with prepreg 3 blanks, reproducing the reinforcement (ribs 4 and frames 5) of the shell, in accordance with the required reinforcement scheme . The assembled sections are mounted on the mandrel 6. The installation of the sections on the mandrel is accompanied by the fixation of the sections using the holes 7 (shown conditionally) in a metal insert. On top of the sections, lay (manually or by an automated stacker) skin layers 8 in accordance with the required reinforcement scheme. A fiberglass sheath 9 (tsulagu), a drainage layer 10 and a vacuum bag 11 are installed on the casing layers. Disassembling the technological equipment after the heat treatment is carried out in the reverse order.

Thus, a new technical solution when implementing rotation from polymer composite materials in a reinforced shell is reproducible industrially using known technologies, gives a new technical result, meets the criterion of "industrial applicability", i.e. level of invention.

Information sources

1. RU No. 2312790 of 06/14/2006, IPC В64С 3/20 (2006), В32В 1/00 (2006), В32В 37/00 (2006), “A method of manufacturing elements of an airframe from polymer composite materials, a mandrel for implementing the method manufacturing an airplane glider and elements of an airplane glider from polymer materials ”(prototype).

Claims (1)

A method of manufacturing a reinforced shell made of polymer composite materials, in which sections of the separation layer are laid on the mandrel, sheathing layers are laid on the sections, heat treated, removed from the mandrel and sections are removed, characterized in that the separation layer sections made of elastic adhesive material are supplemented with metal inserts with holes for fixing sections on the mandrel, the sections are mounted on the mandrel after laying blanks from prepreg on them, manually or using an automated bath stacker, in accordance with the cross reinforcement scheme.

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