RU2568487C1 - Method to manufacture multi-layer structure with truss filler - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: truss filler represents a voluminous structure from various materials in the form of cells shaped as repeating pyramidal and tetrahedral structures. Made by laser cutting from materials, such as metals, ceramics, glass, polymers, composites, semiconductors. Material cloth is cut into three types of repeating zigzag-shaped rod elements. In one version the cloth is cut into zigzag-shaped rod elements with cogs on tops, in the second one - the cloth is cut into zigzag-shaped rod elements without cogs, in the third one - into zigzag-shaped rod elements without and with cogs, in the fourth - into rods having two tops with cogs. In grooves of their bases of all types of zigzag-shaped rod elements they make slots. On linings they made holes for dimensions of cogs for accurate connection with cells, afterwards they collect zigzag-shaped rod elements into a single filler structure, so that slots of grooves of the base with the cogs of the first and third elements match with slots of grooves of the base of second element tops, afterwards pyramidal cells are produced, having one common top with each of the adjacent ones. To produce tetrahedral cells, they connect slots of grooves of the base of the third element tops with slots of grooves of the fourth element base, afterwards the produced cells are connected by linings, for these purpose the cogs arranged on tops and ends of each of zigzag-shaped rod elements are inserted into slots of holes in linings and area of their contact is welded or glued for tight connection of the filler with linings.

EFFECT: simplified method to manufacture truss filler with cells in the form of pyramidal and tetrahedral structures and their increased stiffness by increasing quality of their connection with the help of gluing, welding or soldering.

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Description

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

Known "A method of manufacturing a truss aggregate", including sheathing, truss aggregate, consisting of intertwined rods located between two sheaths. Sheet material (future sheathing) is fed into the assembly fixture, and truss aggregate is driven there. Then, using a welding device, the sheathing sheets are connected to the tops of the filler. Welding takes place over the entire width of the panel. The output is a finished power three-layer panel with truss filler (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 method is the need for specialized welding equipment, as well as sophisticated technological equipment for installing skins on truss aggregate. The fixture used to ensure structural rigidity during welding requires a certain internal space for placement and, therefore, imposes a restriction on the size of the structure. Also, the quality of the welds and the integrity of the structure with this type of welding is doubtful. Thus, this method is technologically complex and expensive.

The closest in technical essence, taken as a prototype, is the invention "A method of manufacturing a multifunctional honeycomb core", comprising two skins and repeating volumetric cells made of rod elements with improved structural properties and multifunctional design. Aggregates can be made of various materials (metals, ceramics, glass, polymers, composites, semiconductors) and have different cross sections (square, circle, rectangle). For the manufacture of this filler, a sheet of material is taken, then using a stamp, hexagonal and square holes are obtained by extrusion (cutting). Then the resulting sheet with holes is driven under a stamp with recesses in the form of pyramids and tetrahedrons and pressure is applied with a deflection on the sheet with square and hexagonal holes, and in this case structures in the form of repeating pyramidal and tetrahedral cells are obtained. Next, the obtained aggregate is connected to the casing, soldering or welding at the contact points (US Patent No. 2011/0250385 A1, publ. 10/13/2011, IPC B32B 3/12, B32B 37/00, B32B 3/06).

The disadvantage of this invention is the complexity of the manufacturing process of a multilayer honeycomb core structure, which is time consuming, and also the inability to perform accurate welding or gluing at the contact points of the rods with the casing, which reduces the quality of the connection and, therefore, reduces the rigidity of the aggregate, generally reduces the efficiency of the method manufacture.

The problem to be solved is to simplify the method of manufacturing a multilayer structure with truss aggregate by reducing the time to produce aggregate with cladding, increasing the rigidity of the structure by improving the quality of their connection by gluing, welding or soldering.

The technical result from the use of the present invention is the creation of a highly efficient method for manufacturing a multilayer structure of truss aggregate by simplifying the method of manufacturing a truss aggregate with cells in the form of pyramidal and tetrahedral structures and increasing their rigidity by improving the quality of their joining by gluing, welding or soldering.

The technical result is achieved by the fact that in the method of manufacturing a multilayer structure with truss aggregate, which consists in obtaining aggregates from various kinds of materials in the form of repeating pyramidal and tetrahedral cells with faces made in the form of zigzag rod elements with vertices and depressions, and combining them with skins, the material web is cut into various types of repeating zigzag rod elements, in the first case, the web is cut into zigzag rod elements with a shea on tops, in the second case, on zigzag rod elements without spikes, in the third case, on zigzag rod elements without spikes and with spikes, in the fourth case, on rods having two vertices with spikes, while in the troughs of their base vertices all of types of zigzag-shaped rod elements, cuts are made, and holes for the dimensions of the spikes are made on the casing for precise connection with the cells, after which the zigzag-shaped rod elements are assembled into a single filler structure, so that the slots of the hollows are The vertices with the spikes of the first and third elements coincided with the slots of the bottoms of the vertices of the vertices of the second element, after which pyramidal cells were obtained having one common vertex with each of the neighboring vertices; moreover, to obtain tetrahedral cells, the cuts of the bottoms of the vertices of the vertices of the third element and the cuts of the bottoms of the fourth base element, then the resulting cells are connected by skins, for this the spikes located on the tops and ends of each rod element are inserted into the slots of the holes in the skins and the contact points they are welded or glued to firmly bond the filler to the skin.

To increase the rigidity of the structure, small spikes are made on the tops of each structure, and holes for these spikes are made on the lining on the mating side. The aggregate joins according to these slots, which increases the accuracy and quality of manufacture. For a more rigid connection of metal structures, it is possible to weld the tops with the skin, for composite structures - an adhesive joint at the junction.

The use of aggregate, made in the form of pyramidal and tetrahedral structures according to this method, increases the operational characteristics of the aggregate, namely rigidity, and leads to a decrease in the mass of the structure without changing the strength characteristics.

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

in FIG. 1 shows a web of material with repeating bar elements;

in FIG. 2 - zigzag rod elements;

in FIG. 3 - lining with holes obtained after cutting;

in FIG. 4 shows the assembly process of zigzag rod elements in a pyramidal filler structure;

in FIG. 5 shows the assembly process of zigzag rod elements into a tetrahedral aggregate structure;

in FIG. 6 - truss placeholder with repeating pyramidal cells;

in FIG. 7 - truss placeholder with repeating tetrahedral cells;

in FIG. 8 - truss aggregate with repeating tetrahedral cells with upper and lower casing;

in FIG. 9 - truss placeholder with repeating pyramidal cells with upper and lower casing,

where: 1 - zigzag rod elements with spikes on tops; 2 - zigzag rod elements with vertices without spikes; 3 - zigzag rod elements with alternating vertices with spikes and without spikes; 4 - spikes in the bases of the vertices of all types of core elements; 5 - cuts in the bases of the vertices of all types of core elements; 6 - a core element with spikes on the tops and a slot, 7 - holes in the skin.

Truss Placement Layered Fabrication

The web of material is cut into three types of repeating zigzag rod elements (Fig. 1), when in the first case, the web is cut into zigzag rod elements with spikes at the peaks 1 (Fig. 2), in the second case, the web is cut into zigzag rod elements without spikes 2 (Fig. 2), in the third case, the web is cut into zigzag rod elements without spikes and with spikes 3 (Fig. 2), in the fourth case, the web is cut into rods having two vertices with spikes 6 (Fig 2), when in the depressions of their foundations of all four species of gzag-shaped rod elements perform slots 5 (Fig. 2), while on the casing holes are made for the dimensions of the spikes 7 (Fig. 3), for precise connection with the cells, then zigzag rod elements are assembled into a single filler structure, so that 5 slots are cut the base of the vertices with the spikes of the first 1 (Fig. 2) and the third element 3 (Fig. 2) coincided with the slots of the valleys of the vertices of the second element 2 (Fig. 2), after which pyramidal cells are obtained (Fig. 6), to obtain tetrahedral cells (Fig. 7), connect the slots 5 of the depressions of the vertices of the third element 3 (Fig. 2) with the slots of 5 depressions of the base of the fourth element 6 (Fig. 2), then the resulting cells are connected by casing (Fig. 8, 9), for this, the spikes 4 located on the tops and ends of each of the rods (Fig. 2) are inserted into the slots of the holes in the casing 7 (Fig. 3) and the contact points are welded or glued to firmly connect the filler to the casing.

Thus, the manufacture of fillers in the form of pyramidal and tetrahedral cells having one common vertex with each of the neighboring ones allows to increase the longitudinal and transverse rigidity of the structure while reducing its mass per unit length.

According to their technical and economic advantages, the claimed technical solution allows to obtain a highly efficient method for manufacturing a multilayer structure by simplifying the manufacture of truss filler in the form of pyramidal and tetrahedral structures with high quality characteristics, while increasing rigidity.

Claims (1)

A method of manufacturing a multilayer structure with truss aggregate, which consists in obtaining aggregates from various kinds of materials in the form of repeating pyramidal and tetrahedral cells with faces made in the form of zigzag rod elements with vertices and depressions, and combining them with skins, characterized in that the fabric of material is cut into different types of repeating zigzag rod elements, in the first case, the web is cut into zigzag rod elements with spikes on the tops, or, in in the second case, on zigzag rod elements without spikes, or, in the third case, on zigzag rod elements without spikes and spikes, or, in the fourth case, on rods having two vertices with spikes, while in the troughs of their bases of vertices of three types Zigzag-shaped rod elements perform slots, and holes for the dimensions of the spikes are made on the skin for precise connection with the cells, after which zigzag-shaped rod elements are assembled into a single filler structure, so that the slots of the base of the vertices are cut with the spikes of the first and third elements coincided with the slots of the depressions of the base of the vertices of the second element, after which pyramidal cells are obtained having one common vertex with each of the neighboring ones, and to obtain tetrahedral cells, the slots of the depressions of the base of the vertices of the third element are also connected with the slots of the depressions of the base of the fourth element then the resulting cells are connected by sheaths, for this the spikes located on the tops and ends of each rod element are inserted into the slots of the holes in the sheaths and welded into the contact points They are bonded or glued to firmly bond the aggregate to the skin.

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