Methods of manufacturing a stiffening element for an aircraft skin panel and a skin panel provided with the stiffening element
First Claim
1. A method of manufacturing an elongate stiffening element for an aircraft skin panel, comprising the following steps:
- a) preparing a pile of sheet-metal strips bent so as to have a cross-section of given shape, with at least one layer of resin-impregnated fibre interposed between two consecutive sheet-metal strips, and b) applying heat and pressure to the pile thus produced in a manner such as to cure the resin and set the shape.
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Accused Products
Abstract
A method of manufacturing a stringer for a fuselage skin panel comprises the steps of:
preparing a pile of sheet-metal strips bent so as to have a cross-section of given shape, alternating with at least one layer of resin-impregnated fibre, and
applying heat and pressure to the pile in a manner such as to cure the resin and set the shape.
A composite laminated stringer is thus obtained.
In order to manufacture a fuselage panel of composite laminated material, provided with composite laminated stringers, the resin in the stringers is cured simultaneously with the resin which is present between the metal layers of a laminate suitable for forming the outer skin.
88 Citations
13 Claims
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1. A method of manufacturing an elongate stiffening element for an aircraft skin panel, comprising the following steps:
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a) preparing a pile of sheet-metal strips bent so as to have a cross-section of given shape, with at least one layer of resin-impregnated fibre interposed between two consecutive sheet-metal strips, and b) applying heat and pressure to the pile thus produced in a manner such as to cure the resin and set the shape. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of manufacturing an aircraft skin panel with elongate stiffening elements, comprising the steps of:
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a′
) preparing at least one pile of sheet-metal strips bent so as to have a cross-section of given shape, with at least one layer of resin-impregnated fibre interposed between two consecutive sheet-metal strips,b′
) preparing a laminate suitable for forming the outer skin, the laminate comprising at least two sheet-metal layers with at least one layer of resin-impregnated fibre interposed between two consecutive sheet-metal layers,c′
) arranging the at least one pile on the skin laminate with a layer of adhesive interposed between the pile and the skin laminate, andd′
) applying heat and pressure in a manner such as to cure simultaneously the resin contained in the fibre layers of the pile and of the laminate, and the adhesive interposed between the pile and the laminate. - View Dependent Claims (9, 10)
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11. A method of manufacturing an aircraft skin panel with elongate stiffening elements, comprising the steps of:
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a″
) preparing at least one pile of sheet-metal strips bent so as to have a cross-section of given shape, with at least one layer of resin-impregnated fibre interposed between two consecutive sheet-metal strips,b″
) applying heat and pressure to the pile thus produced in a manner such as to cure the resin and set the shape so as to produce at least one elongate, composite, rigid element,c″
) preparing a laminate suitable for forming the outer skin, the laminate comprising at least two sheet-metal layers with at least one layer of resin-impregnated fibre interposed between two consecutive sheet-metal layers,d″
) arranging the elongate rigid element on the laminate, with a layer of adhesive interposed between the elongate element and the laminate, ande″
) applying heat and pressure in a manner such as simultaneously to cure the resin contained in the fibre layers of the laminate and the adhesive interposed between the elongate element and the laminate.
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- 12. An elongate stiffening element for an aircraft skin panel, wherein the element comprises a pile of sheet-metal strips bent so as to have a cross-section of given shape, with at least one layer of resin-impregnated fibre interposed between two consecutive sheet-metal strips.
Specification