(57) Abstract:The invention relates to the construction, namely the panels lightweight type with a cellular core. The invention is in that to create a honeycomb core used bars with a length to width ratio 15 25 combined into regular hexagons, arranged perpendicularly to the plane of the covering sheet with an offset to one another in height. This can significantly reduce the consumption of the panel while providing a given load-bearing capacity. 3 C.p. f-crystals, 5 Il. The invention relates to the construction, namely, panels, fencing cell type filling.The closest known is the panel, including tying in the form of a frame, a plate and fill units.A disadvantage of the known panel is the impossibility of its wide use in the construction, since the elements filling made of foil, not having the properties of the supporting structure.The purpose of the invention, the efficiency in the design of the honeycomb core, reduce material consumption, expanding the use of panels.This is achieved by the fact,SKOV, having a length to width equal to 15-25, and forming in planes perpendicular to the plate, regular hexagons with a total related parties. When the hexagons are arranged in parallel planes in tiers one another with a gap between the planes, and each of the bars overlying hexagon located in the plane passing through the corresponding block of the underlying hexagon. In addition, the gaps between the parallel planes of arrangement of hexagons increases from the periphery to the middle of the panel. In adjacent parallel planes hexagons are arranged one behind the other with a shift by the same amount, less the width of the hexagon.In Fig. 1 shows a General view panel (cross-section), and Fig.2 one longitudinal displacement of the elements filling; Fig.3 is another schematic longitudinal displacement of the elements filling; Fig.4 a view of the bar with a length to width ratio equal to 20, the node joint bars; Fig.5 scheme of increasing gaps between the rows of elements filling
The panel consists of tying in the form of a frame 1, sheet 2 of the casing, and filling elements 3 with the above-mentioned ratio, defined expatrie are offset relative to each other by the same amount, smaller width chistipolsky (see Fig.2 and 3). To further reduce material consumption panel hexagons have on the length of the panel in parallel rows with the increase of the gap between them from the periphery to the center of the panel according to the design scheme of the loads.This embodiment of the panel allows to significantly reduce its consumption through the implementation of elements of the filling of a structural material with a redistribution of a part of the load. 1. The PANEL, including tying in the form of a frame, a plate and fill units, characterized in that the elements filling made of bars having a length to width of the 15oC 25 and forming in planes perpendicular to the plate, regular hexagons with a total related parties.2. The panel p. 1, characterized in that the hexagons are arranged in parallel planes in tiers one another with a gap between the planes, and each of the bars overlying hexagon located in the plane passing through the corresponding block of the underlying hexagon.3. The panel p. 2, characterized in that the gaps between the parallel planes of the sixth location is adjacent parallel planes hexagons are arranged one behind the other with a shift by the same amount, the smaller the width of the hexagon.
FIELD: mechanical engineering.
SUBSTANCE: method comprises joining members through the intermediate layer made of unwoven synthetic cloth provided with glue on its surface. The glue is applied by strips.
EFFECT: enhanced strength of joining.
FIELD: processes for repairing laminate articles having different-structure layers, namely noise suppression apparatuses, articles having first and second facings separated by intermediate layer such as honeycomb panels.
SUBSTANCE: method comprises steps of introducing adhesive into zones of exfoliation of facing from honeycomb filler; making fastening member of wire piece and preliminarily imparting to it П-shaped configuration; introducing free ends of П-shaped fastening member in openings for fixing them at tightness; in addition arranging bearing plate on supporting facing and drilling in said plate openings for ends of wire fastening member while aligning openings of plate with openings drilled in panel.
EFFECT: possibility for repairing acoustic honeycomb panel without significant changes of its constructional members at minimum declining of operational characteristics of panel and of the whole engine.
9 cl, 13 dwg
FIELD: aircraft industry; production of light volume fillers made out of the laminated materials.
SUBSTANCE: the invention is pertaining to production of light volume fillers made out of the laminated materials for sandwich panels and may be used in production of aircrafts. The filler represents a volumetric construction in the form of a base made out of a polymeric paper and a binding substance applied on its both sides. The paper base of the filler is perforated, and due to that the binding substance layer depth is reduced, and the value of reduction, the number of pinholes of the perforation and their diameter meet the conditions of theformula: where: nholes - a quantity of holes of perforation;dholes - diameter of the holes, ▵b - reduction of the binding substance layer depth, F - the area of the surface of the filler, δp - the base layer depth, ρp - density of the paper base material, ρb - density of the binding substance. The given engineering solution improves profitability of an aircraft.
EFFECT: the invention ensures improved profitability of an aircraft.
FIELD: construction industry; methods of manufacture of a pleated filler out of composite materials for production of sandwich panels.
SUBSTANCE: the invention is pertaining to production of the channeled constructions with the pleated filler made out of composite materials. The method includes a laying of a planar sheet of a reinforcing material billet, its impregnation with a binding substance, production of a prepreg, curing of the binding substance in the process of the hot pressing with production of a planar billet - semi-finished product in the form of a combination of the relatively rigid sections, having the shape of sides of the pleated filler and separated from each other by some space. After that follows a form-shaping of the billet- semi-finished product by bending with production of a relief form of the pleated filler with the necessary geometric parameters, and the final curing of the whole applied binding substance. The reinforcing material is impregnated over the whole surface of the billet. A heat feeding for the binding substance heat setting in the produced prepreg conduct only within the limits of the above indicated sections. Along the bands of the prepreg between these sections create conditions retarding the process of the curing. The given engineering solution raises efficiency of the process.
EFFECT: the invention ensures an increased efficiency of the process.
2 cl, 2 dwg
FIELD: furniture industry; construction industry; ship-building industry; aircraft industry; space-rocket industry; methods of manufacture of cellular fillers.
SUBSTANCE: the invention is pertaining to the method of manufacture of cellular fillers for the three-layer panels and shells, in particular, made out of the glass-fiber cloth and may be used in different industries: furniture industry, construction industry, ship-building industry, aircraft industry, space-rocket industry. The technical problem of the invention is to increase the interlaminar strength of the cellular blocks along the glue bands at manufacture of the bulky glass-cellular blocks. The method includes: application of the glue bands on the canvas of the material in the longitudinal direction; the canvases of the material cutting into billets in the direction perpendicular to glue bands; assembly of a cellular package by stacking the billets with a shift of each billet in respect to another one by a half of the pitch of the glue bands; agglutination of the billets of the cellular package in compliance with the given mode and production of the cellular block by stretching the cellular package, impregnation of the cellular block with a polymeric binding with its following curing. At that before stretching conduct a thermostabilization of the free hanging cellular package within 4-5 hours at the temperature exceeding the temperature of polymerization of the glue by 10-30°C.
EFFECT: the invention ensures an increased interlaminar strength along the glue bands of the bulky glass-cellular blocks.
1 tbl, 11 ex
FIELD: chemical industry; methods of production of the laminated structures transformed at stretching into the cellular constructions.
SUBSTANCE: the invention is pertaining to the field of manufacture of cellular constructions on the basis of thermoplastics, in particular, to the field of manufacture by welding of the laminated structures made out of the plane thermoplastic bands capable at stretching to be converted into the cellular construction. The method includes a layer by layer stacking of the bands made out of the plane thermoplastic material, their fixation along the all length under pressure, welding of the upper and the lower bands and chilling. Then it is necessary to conduct the stacking on the package made from two first welded bands in turn of each subjected to laying on the package bands of the same length and to repeat the welding process. At that they exercise in turn motion of the package by a half of the pitch of the package weld seams in any side at welding of an odd band and a return in the initial position at the welding of the even band. At the stacking of the bands made out of the plane thermoplastic material first fix them on the one side edge, limit their shift in width, then stretch them in the longitudinal direction and fix in the stretched state on the bands other side edge. Welding by the weld penetration is exercised during 5-15 seconds with the simultaneous welding of the longitudinal edges without the weld penetration of the bands. Chilling of welding seams first conduct in the open air for 2-4 seconds without pressure, and then - under the same pressure, as the pressure used during welding - for 5-10 seconds with the help of the additionally stacked plate. The invention ensures improvement of the quality of bonding the thermoplastic layers, acceleration of the process of manufacture of a laminated structure and reduction of its prime cost.
EFFECT: the invention ensures improvement of the quality of the thermoplastic layers bonding, acceleration of the process of manufacture of a laminated structure and reduction of its prime cost.
FIELD: rocketry and space engineering; structural members of spacecraft solar batteries.
SUBSTANCE: proposed load-bearing panel of solar battery has frame and load-bearing upper and lower bases. Mounted tightly in between said bases and frame is cellular filler; load-bearing partitions are mounted perpendicularly relative to bases. Each version of invention provides drain holes in side surfaces of each honeycomb cell of filler and in load-bearing partitions for communication of interior of honeycomb cells. According to first version of invention, drain holes for communication of interiors of honeycomb cells with external medium are made in at least one member of frame; according to second version of invention, drain holes are made in lower base of panel smoothly over area of its surface; according to third version of invention, drain holes are made in at least one member of frame and in lower base of panel smoothly over area of its surface. Total areas of drain holes in said structural members of load-bearing panel are determined taking into account total volume of gas medium in honeycomb cells, drainage coefficients of drain holes ands maximum pressure differential in launch vehicle flight trajectory acting on panel bases.
EFFECT: enhanced structural strength with no increase of mass; facilitated procedure of manufacture; enhanced operational reliability.
4 cl, 4 dwg
FIELD: rocketry and space engineering; structural members of spacecraft case.
SUBSTANCE: proposed load-bearing panel has frame and load-bearing lower and upper bases with cellular filler arranged in between bases and frame. For communication of interiors of honeycomb cells, provision is made for drain holes in side surfaces of each honeycomb cell. According to first version, communication of interiors of honeycomb cells is carried out through drain holes available in at least one member of frame; according to second version, drain holes are made in at least one load-bearing members of panel smoothly over area of its surface; according to third version, drain holes are made in at least one member of frame and in least one load-bearing base of panel smoothly over area of its surface. Total areas of drain holes in said structural members are determined with total volume of gas medium in honeycomb cells, drainage coefficient of drain holes and maximum pressure differential of gas medium acting on bases of panel taken into account.
EFFECT: enhanced structural strength of load-bearing members of spacecraft case without increase of their mass; facilitated procedure of manufacture and ease in mounting the panels; enhanced operational reliability.
4 cl, 4 dwg
FIELD: building members, particularly heat-insulated building unit used as filler structures, facings and building structures.
SUBSTANCE: heat-insulated building member comprises outer layers, metal foil screen layers, cellular packing layers made of bent paper strips and adhered one to another. Cells of one packing layer are displaced with respect to that of another packing layer. Outer layers are made of metal foil and are used as screens and load-bearing layers. Cellular packing layers are connected with each other by means of flat paper sheets. Planes of adjacent packing layer connection areas are turned one relative another through angle equal or less than 90°. Packing layer thickness, namely cell height, and cell dimensions are reduced towards outer layers. Flat paper sheet thickness increases towards outer layers. Packing layer cells adjoining outer load-bearing layer facing heat-dissipation surface are filled with foaming composition. The foaming composition includes components, which sublimate under the action of high temperature with water vapor or carbonic oxide gas emission. Adjacent packing layers adjoining opposite outer load-bearing layers are filled with ecologically-safe cotton wool. Ratio between flat paper sheets and packing layer thickness (cell height) is 1:1 - 1:250. Ratio between cell height and cell face dimensions is 1:2-1:5. Ratio between bent paper strip thickness used for cell production and packing layer thickness (cell height) is 1:50-1:300. Ratio between mean packing layer thickness (mean 9-th cell height) and heat-insulation layer thickness is 1:2-1:60.
EFFECT: increased load-bearing capacity, strength and fire-resistance along with retention of good heat-insulation properties.
5 cl, 2 dwg