RU2580729C1 - Frame-like aggregate sandwich panel - Google Patents

Abstract

FIELD: manufacturing technology.

SUBSTANCE: invention relates to multilayer structures with fillers in the form of repeating pyramidal and tetrahedron structures and can be used in production of multilayer panels from various materials, operating on stability under external pressure and compression force in many industries. Frame-like aggregate sandwich panel is composed by 3D structure in the form of repeating pyramidal or tetrahedron cells having common vertex with every adjacent, with ribs made in the form of zigzag-shaped rod elements and skins. On each apex and base of the pyramidal or tetrahedron cells there are pins; at the same repeating ribs of rod elements of pyramidal or tetrahedron cells the pins are made at the tops while other elements have no pins, at the tops and ends at the third elements pins are made only at the ends, on the fourth elements pins are made only at the tops of rods, the ribs of rod elements are arranged and directed at preset angles to the base to ensure required stiffness, while in cavities of all types of zigzag-shaped rod elements at tops and bases there are made slots; on the skin of mating part there are slots corresponding by size and configuration to pins in order to provide accurate connection to cells within a single structure of filler so that the slots in the base and at the tops of zigzag rod elements coincide with each other. Resulting cells are connected via skins. For this purpose pins located at the tops and ends of each rod are inserted into the mating holes corresponding by size and configuration to pins; contact points are further welded or glued for strong connection.

EFFECT: invention provides creation of reliable and strong filler structure due to simple connection of skins.

1 cl, 6 dwg

Description

The invention relates to multilayer structures with fillers in the form of repeating pyramidal and tetrahedral structures and can be used in the manufacture of multilayer panels of various materials, such as metals, ceramics, glass, polymers, composites, semiconductors, operating under resistance to external pressure and compressive force used in aircraft, shipbuilding, engineering, construction and other industries.

The effectiveness of three-layer structures for various types of loading is largely determined by the geometric and mechanical characteristics of the aggregate used, and the search for new aggregate structures is natural.

Known truss aggregate and method of its manufacture, including lining, truss filler, in the form of pyramidal cells formed by connecting repeating pyramidal cells and two lining (US patent No. 6.644.535 B2, publ. 11.11.2003, IPC B21D 39/00; B23K 1 / 20; B23K 31/00; B32B 5/12; B32B 7/00).

The disadvantage of this panel is the complexity of the design and the lack of strength when connected to the casing, as well as the complexity of the technological equipment for installing the casing on the truss aggregate.

The closest in technical essence, taken as a prototype, is the invention "Multifunctional honeycomb core and method of its manufacture", including two skins and repeating volumetric cells made of core elements. Aggregates can be made of various materials (metals, ceramics, glass, polymers, composites, semiconductors) and have different cross sections (square, circle, rectangle) (US patent No. 2011/7963085 B2, publ. 06/21/2011, IPC 52 / 782.1.52 / 652.1.633).

The disadvantage of this invention is the inability to accurately bond at the contact points of the rods with the casing, which reduces the quality of the connection, and hence the strength of the aggregate.

The solved problem of the invention is to increase the strength of the truss aggregate due to design features that allow for simple and high-quality connection of skins.

The technical result from the use of the invention is the creation of a reliable and durable truss aggregate due to the simple and high-quality connection of skins.

The technical result is achieved by the fact that in the truss filler of a multilayer panel, which is a three-dimensional structure in the form of repeating pyramidal or tetrahedral cells having a common vertex with each of the adjacent ones, with ribs made of zigzag rod elements, plating, at each vertex and base of the pyramidal or spikes are located in the tetrahedral cells, and holes for the size and configuration of the spikes are located on the casing in the counterpart, moreover, on some repeating ribs of the rod elements iramidal and tetrahedral cells, the spikes are made at the tops and ends, at the other without spikes, at the tops and at the ends, at the third - spikes are made only at the ends, at the fourth - spikes are made only at the tops of the rods, while the edges of the rod elements are located and directed at predetermined angles to the base to ensure the necessary structural rigidity, and in the hollows of the zigzag rod elements at the vertices and at the base of the cells, slots are made to connect the edges of the zigzag rod elements in a single Onstruction.

To clarify the technical nature, consider the drawings, which depict:

in FIG. 1 shows zigzag rod elements;

in FIG. 2 - lining with holes;

in FIG. 3 - truss filler in the form of pyramidal cells;

in FIG. 4 - truss filler in the form of tetrahedral cells;

in FIG. 5 - truss filler in the form of tetrahedral cells with upper and lower casing;

in FIG. 6 - truss filler in the form of pyramidal cells with upper and lower casings,

where indicated: 1 - zigzag rod elements with spikes on the tops and ends; 2 - zigzag rod elements without spikes; 3 - zigzag rod elements with spikes at the ends and without spikes at the tops; 4 - hollows of zigzag rod elements at the tops and at the bases; 5 - cuts in the hollows at the peaks and at the bases; 6 - rod element with a spike on its top; 7 - holes in the casing for the size and configuration of the spikes.

Truss Placeholder Construction

The material web is cut into four types of repeating ribs of zigzag rod elements (Fig. 1), which are located and directed at predetermined angles, providing the necessary rigidity and strength, when, in the first case, they are cut into repeating zigzag rod elements with spikes at the tops and ends 1 (Fig. 1) when they are cut into repeating zigzag rod elements without spikes 2 (Fig. 1), when they are cut into repeating zigzag rod elements without spikes at the tops and with spikes at the ends 3 (f ig. 1) when they are cut into repeating zigzag rod elements with spikes at their vertices 6 (Fig. 1), while in the hollows at the vertices and at the bases of the zigzag rod elements, slots 5 are made (Fig. 1), moreover, the response is performed on the casing cuts for the dimensions and configuration of the spikes 7 (Fig. 2), for precise connection with the cells, in a single design, and by connecting 1, 2, 3 (Fig. 1) rod elements, we obtain pyramidal cells by connecting 3, 6 (Fig. 2). 1), get the tetrahedral cells of the filler so that the slots of the troughs of the zigzag rod elements coincide with each other, after which the resulting cells are connected by casing (Fig. 5, 6), for this the spikes located on the tops and ends of each of the rods are inserted into the response holes for the dimensions and configuration of the spikes, and their contact points are welded or glued for a strong connection, increasing the strength and reliability of the truss filler.

Compared with the known analogues, the inventive truss filler, made in the form of repeating pyramidal or tetrahedral cells having one common vertex with each of the neighboring, allows to increase the longitudinal and transverse stiffness while reducing its mass per unit length, as well as to increase the reliability and strength of the proposed designs due to the implementation of spikes on repeating pyramidal or tetrahedral cells at the vertices and ends and with mating holes on the skin for the configuration of the spikes, and pa rod members mounted at predetermined angles to their bases, providing strength, and the slits in the depressions at tops and bottoms of cells, for rigid connection with the ribs into a unitary structure, generally improving reliability truss filler sandwich panel.

Claims (1)

A truss filler of a multilayer panel, which is a three-dimensional structure in the form of repeating pyramidal or tetrahedral cells having a common vertex with each of the adjacent ones, with ribs made of zigzag rod elements, casing, characterized in that on each vertex and base of the pyramidal or tetrahedral cells spikes, and on the casing in the mating part there are holes for the size and configuration of the spikes, moreover, on some repeating edges of the pyramidal or tetra rod elements the distal cells, the spikes are made at the vertices and ends, at the other without spikes, at the vertices and at the ends, at the third - the spikes are made only at the ends, at the fourth - the spikes are made only at the tops of the rods, while the edges of the rod elements are located and directed under the specified corners to the base to ensure the necessary rigidity of the structure, and in the hollows of the zigzag rod elements at the vertices and at the base slots are made to connect the edges of the zigzag rod elements in a single structure.

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