Assembly of two parts made of composite material

Patent metadata

Field	Value
Publication number	US-9353785-B2
Application number	US-201314012418-A
Country	US
Kind code	B2
Filing date	Aug 28, 2013
Priority date	Aug 30, 2012
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

An assembly of parts, at least one of which is made of composite material, includes at least one fastener including a body and also two stops, between which the parts held by the fastener are disposed, holes formed in the parts held by the fastener, the body of the fastener being accommodated in the holes, the holes having a diameter adapted to that of the body of the fastener so as to allow transmission of forces by the parts and the fastener hammering together. The stops of the fastener exert a compressive force C that makes it possible to obtain transmission of forces by adhesion between the parts held by the fastener.

First claim

The invention claimed is:

1. An assembly comprising:
a plurality of parts having holes formed therein and at least one of which is made of composite material, a first part of said parts and a second part of said parts having adjacent longitudinal edges forming a gap therebetween, said first and second parts being assembled by virtue of a third part of said parts, said third part straddling the gap between the first and second parts; and
a plurality of fasteners each comprising (i) a body, accommodated in one or more of said holes, and (ii) two stops, the plurality of parts being held by the fasteners between said stops, said holes having a diameter adapted to that of the body of the fasteners so as to allow transmission of hammering forces by the plurality of parts and the fasteners impacting one another,
wherein the stops of the fasteners exert a compressive force C on the plurality of parts held therebetween to enable transmission of increased adhesion forces by adhesion between the plurality of parts held by the fasteners,
wherein said increased adhesion forces cause a decrease in said hammering forces,
wherein the plurality of parts held by the fasteners include surfaces of increased roughness structured to provide transmission of the adhesion forces between the plurality of parts when the plurality of parts contact one another at said surfaces, the surfaces of increased roughness having increased roughness relative to another surface of said parts held by the fasteners, and
wherein the at least one part made of composite material comprises, at least in the region of areas of the surfaces of increased roughness structured to provide the transmission of the adhesion forces, at least a last layer in the form of a fibre fabric, a quantity of resin at a surface of the last layer being reduced relative to another portion of said last layer.

2. The assembly according to claim 1 , further comprising an intermediate layer between the plurality of parts held by the fasteners for reinforcing the adhesion forces between the plurality of parts.

3. The assembly according to claim 1 , characterized in that the fasteners have an enlarged surface that exerts said compressive force on the plurality of parts, the enlarged surface having a cross-sectional area greater than three times that of the body of the fasteners.

4. The assembly according to claim 3 , characterized in that the area of the surfaces structured to provide transmission of the adhesion forces between the plurality of parts is greater than or equal to that of the enlarged surface at which the fasteners exert said compressive force.

5. The assembly according to claim 3 , characterized in that it comprises, in a region of at least one of the stops of the fasteners, a washer having an outside diameter greater than three times a diameter of the body of the fasteners.

6. The assembly according to claim 5 , characterized in that the washer has an inside diameter structured to accommodate an annular seal between the body of the corresponding one of the fasteners and the washer.

Assignees

• Airbus Operations Sas

Inventors

• Molinier Bernard

Classifications

• B29C65/562

  using extra joining elements, i.e. which are not integral with the parts to be joined (using plastic snap elements B29C65/58; using plastic rivets B29C65/601) · CPC title

• B29C66/742

  to metals or their alloys · CPC title

• B29L2031/3082

  Fuselages · CPC title

• F16B19/06

  Solid rivets made in one piece · CPC title

• B29C66/02245

  Abrading, e.g. grinding, sanding, sandblasting or scraping · CPC title