RU220501U1 - END SUPPORT OF HONEYCOMB PANEL - Google Patents

Abstract

The utility model relates to the field of aerospace engineering and can be used to create honeycomb panels that have nodes for attaching structures, devices and equipment to their surface.

The technical problem that the claimed utility model is aimed at solving is increasing manufacturability in the manufacture of the end support unit insert, as well as improving the design of the end support unit.

This technical problem is solved by the design of the end support unit of the honeycomb panel, containing a rectangular cross-section insert glued into the cutout of the honeycomb core between the upper and lower skins; on the side faces of the insert there are holes into the internal cavity, covered with plates that are fixed with glue, the internal cavity The inserts are limited by thin side edges and bosses for placing holes in them for fastening elements; they are made in such a way that along the perimeter of the holes in the internal cavity there are ledges that exceed the overall dimensions of the holes in which the plates are installed, flush with the surface of the side edges.

Description

The utility model relates to the field of aerospace engineering and can be used to create honeycomb panels that have nodes for attaching structures, devices and equipment to their surface.

An end support assembly is known, containing an insert with mounting holes located at the end of the honeycomb panel, glued into the cutout of the honeycomb core between the upper and lower skins (US patent 7167631 B2).

The disadvantage of this device is the increased mass of the end support unit, due to the fact that the insert is made as a monolithic part. Disadvantages also include the impossibility of attaching interface elements to other surfaces of the honeycomb panel, in addition to the end, and the small area of gluing the insert to the upper and lower skins, which causes the low load-bearing capacity of the insert.

As a prototype, the end support unit of a honeycomb panel was chosen, presented in patent RU 204976 U1, containing a rectangular cross-section insert glued into the cutout of the honeycomb core between the upper and lower skins ; on the side faces of the insert there are holes into the internal cavity, covered with plates that are fixed using glue, the internal cavity of the insert is limited by thin side edges and bosses to accommodate holes for fasteners.

The disadvantage of the prototype is the low manufacturability of installing the plates into the overlapping holes in the internal cavity, because they require preliminary fixation on the insert before gluing, which complicates the technological process of manufacturing the end support unit of the honeycomb panel.

The following essential features common to the prototype have been identified for the claimed device:

- honeycomb panel, consisting of upper and lower skins and honeycomb core between them;

- presence of a cutout in the honeycomb core;

- insert with mounting holes installed in the cutout;

- the insert has internal cavities limited by side edges for gluing into a honeycomb panel and bodies designed to accommodate mounting holes;

- the insert has holes for internal entrances that are closed with plates.

The technical problem that the claimed utility model is aimed at solving is increasing manufacturability in the manufacture of the end support unit insert, as well as improving the design of the end support unit.

This technical problem is solved by the design of the end support unit of the honeycomb panel, containing a rectangular cross-section insert glued into the cutout of the honeycomb core between the upper and lower skins ; on the side faces of the insert there are holes into the internal cavity, covered with plates that are fixed with glue, the internal cavity The inserts are limited by thin side edges and bosses for placing holes in them for fastening elements; they are made in such a way that along the perimeter of the holes in the internal cavity there are ledges that exceed the overall dimensions of the holes in which the plates are installed, flush with the surface of the side edges.

The essence of the claimed technical solution is illustrated by two drawings:

- fig. 1 – projection view of the end support assembly with plates;

- fig. 2 – section of the end support unit with plates in the plane;

- fig. 3 – insert installed in the honeycomb panel.

The end support assembly consists of an insert 1 containing holes in the internal cavity 2 of the insert 1 and a body 3 on its surface (see Figs. 1 - 2). Holes into the internal cavity 2 and body 3 are formed during the production of the end support unit, for example, using milling. The internal cavity 2 is designed to facilitate insertion and is formed by sampling (removing) metal from the insert, and bodies 3 are metal that has not been sampled.

The holes in the internal cavity 2, located on the side where insert 1 is glued to the honeycomb core 8, are overlapped by plates 4, while plates 4 are fixed on insert 1 in ledges 5 that exceed the overall dimensions of the holes. In this case, the number of holes in the internal cavity 2 can vary depending on production needs.

In fig. Figure 3 shows the end support assembly installed in the honeycomb panel 6. Thanks to the plates 4 fixed on the insert 1, when gluing the insert 1 into the honeycomb panel 6, the adhesive connection does not get into the internal cavities of the insert 1, and the load-bearing capacity of the insert 1 does not decrease. After Therefore, fastening holes 7 are made on the bodies 3 of the end support unit, intended for fastening structures, instruments and equipment (not shown in Fig. 3).

Assembly of the end support unit is carried out sequentially. Insert 1 has the shape of a rectangular parallelepiped. In insert 1, holes are made into the internal cavity 2 and body 3. Along the perimeter of the holes into the internal cavity 2, ledges 5 are made, exceeding the overall dimensions of the holes 2 into which the plates 4 are installed, flush with the surface of the side edges of the insert 1. The holes in the internal cavity 2 with the sides of the end of the honeycomb panel remain open, and on the side where the insert is glued to the honeycomb core 8, they are covered with plates 4. After this, insert 1 is glued into the cutout of the honeycomb core 8 of the honeycomb panel 6 between the skins 9 and 10. Then insert 1 is machined to make it into the bodies 3 mounting holes 7.

The technical result when using the end support unit is to increase manufacturability in the manufacture of the insert, due to the creation of ledges along the perimeter of the holes in the internal cavities, exceeding the overall dimensions of the holes in which the plates are installed, flush with the surface of the side faces, reducing the labor intensity when installing the plate in the internal cavities and , as a result, improvement of the design of the end support unit.

Claims (1)

End support assembly of a honeycomb panel, containing an insert of rectangular cross-section, glued into the cutout of the honeycomb core between the upper and lower skins, on the side edges of the insert there are holes into the internal cavity, covered with plates that are fixed with glue, the internal cavity of the insert is limited by thin side edges and bosses for placing holes in them for fastening elements, characterized in that along the perimeter of the holes in the internal cavity of the insert there are ledges that exceed the overall dimensions of the holes in which the plates are installed, flush with the surface of the side faces.