RU2342504C1 - Netted thermo-profile and method of its manufacturing - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention pertains to construction, in particular to constructions of netted thermo profiles with C or U-shaped section, used as bearing frame elements of pre - fabricated buildings, roofs, fronts, balcony walls, where it is necessary to eliminate "cold joints" effect, and to the method of manufacture of netted thermo profiles. Set task is solved through consecutive vertical drawing of slots made in the central part of the blank symmetrical to the profiling axis from utter rows of the blank to the center in drawing cages forming a netted construction, and further in smoothing cages netted construction is displaced from the center to the edges by smoothing rollers with simultaneous leveling of the netted surface, whereat cells in internal rows of the netted construction acquire diamond shape, and lateral - triangle shape with rounded top, thereat excess of longitudinal draw of the metal on the bridges between the through cells are eliminated by knurling in the shape of buckles in the extension zone.

EFFECT: creation of netted thermo profile having smaller width of the initial blanks (strip) to save up material, retaining geometric characteristics and heat conduction of thermo profiles of identical cross section.

3 cl, 5 dwg

Description

The invention relates to the field of construction, in particular to the construction of thermoprofiles with C and U-shaped cross-sections used as load-bearing elements of the frames of prefabricated buildings, roofs, facades and balcony walls, where it is necessary to exclude the influence of "cold bridges", as well as to a manufacturing method retrofit thermoprofiles.

Thermal profiles of firms “Lindab constru-tine” are known on the Internet at www.Lindab.com., “INSI” is on the Internet at www.Insi.ru., “Cherepovets-Profil” is on the Internet at www.profil 35.ru. A feature of any thermal profile is the presence on its supporting elements of perforation in the form of through grooves arranged in a checkerboard pattern with an offset pitch, which increase the paths of heat flows, reducing thermal conductivity by 80-90%, depending on the type of profile.

The punching of such cuts, regardless of the method of their production (stamp or rotary installation), does not affect the width of the initial billet (see figures 1, 2).

The technical task of the invention is the creation of thermo-profiles of mesh, C or U-shaped cross-section, which, while maintaining the geometric characteristics of H, S and thermal conductivity of thermo-profiles of identical cross-section, would have a smaller width of the initial billet (tape) in order to save metal.

A known method of manufacturing a profile of the angular mesh (RU No. 2240194 IPC 7 B21D 47/00, 5/06) which includes feeding the tape into a multi-stand roll forming mill, in which form the perforation of the workpiece and form a profile. Preliminarily, a longitudinal groove is formed along the length of the workpiece along its axis of symmetry, the workpiece perforation is formed in the form of a diamond-shaped mesh by applying rows of longitudinal slots equal in length and located in adjacent rows with a half-offset relative to each other and further drawing out the slots from the edges of the workpiece to it center with successive transitions along the stands. The profile is formed in the form of an angle between the mesh shelves of the profile by their successive folding towards each other in a roll forming mill. After the formation of the angle, the outer surface of the shelves of the profile is aligned in an additional working stand.

As a blank, use a tape with a width equal to the length of the shelf in unstretched condition.

The disadvantage of the described method relates to the impossibility of manufacturing thermo-profiles of mesh C or U-shaped cross section, in which the extraction of the rows of slots is carried out not from the edges of the workpiece (tape), but in the central part.

The problem is solved by drawing the original workpiece by transforming the rows of longitudinal slots with the original width "Ex." (Fig. 3) into a mesh structure with diamond-shaped cells with a given width "C" (Fig. 4) by completing the automatic cold forming line with the mill perforated, consisting of perforated, exhaust and smoothing stands, located in front of the bending mill.

In the claimed method for the manufacture of thermo-profiles, the mesh tape from the unwinder enters the groove stand, in which, with special cutting grooves of the upper and lower circular knives, rows of through longitudinal slots of equal length and staggered with a half-step offset are applied to its surface without removing metal. symmetrically to the axis of profiling in the central part of the workpiece.

The number of rows of slots "n" is not less than three on both sides of the axis of profiling is limited by the mechanical properties of the final product.

Then a sequential vertical drawing of the slots from the extreme rows of the workpiece to the center is performed, forming a mesh structure. The hood is drawn in the hoods using cam wheels located in pairs above and below, the thickness of which corresponds to the distance between the rows of slots, and the distance between the tops of the teeth is a multiple of the step of the slots. Further, in the smoothing stands, the mesh structure with the help of smoothing rollers located above and below is shifted from the center to the edges with the horizontal alignment of the mesh structure, while the cells of the inner rows of the mesh structure acquire a diamond shape, and the side ones become a triangle with a rounded apex. The excess metal longitudinal stretching on the bridges between the through cells is removed by knurling in the form of transverse corrugations in the tension zone.

Next, the workpiece enters the roll forming mill, where, through the profiling tool of the tool set-up, sequential continuous deformation of the metal is carried out to obtain a thermo-profile of a mesh of a given cross section.

For the manufacture of thermoprofiles of mesh C or U-shaped cross-section, a blank (tape) is used with a width smaller by 2 × (n-1) h in comparison with thermoprofiles of identical cross-section, where

"N" is the number of rows of slots on one side of the axis of profiling,

"H" is the amount of stretching of the slot in the transverse direction.

Thermal profiles made in this way with a C or U-shaped cross section have a mesh wall, in which the cells of the inner rows have a rhomboid shape, the side shape of a triangle with a rounded top, and knurled in the form of transverse corrugations with a given step on the bridges between the cells (see Fig. .5).

Claims (4)

1. Mesh thermal profile, having a cross section, which contains a wall with rows of longitudinal perforated slots, equal in length and staggered with a half step offset symmetrically to the profiling axis, and two side shelves, characterized in that the rows of longitudinal slots in the profile wall after vertical drawing and horizontal alignment, they have a mesh structure with cells on the inner rows of a diamond-shaped shape, on the side in the form of a triangle with a rounded top, and jumpers between cells knurled in the form of transverse corrugations with a given step. 2. A method of manufacturing a mesh thermal profile, including unwinding a tape from a roll, cutting through rows of slots of equal length and staggered with a half-step offset symmetrical to the profiling axis from the edge of the workpiece, sequential continuous deformation of the metal to obtain a profile of a given cross section, characterized in that after cutting on the surface of the workpiece n rows of longitudinal through slots without removing metal, sequential vertical drawing of the slots from the extreme p the poisons of the workpiece to the center in the exhaust stands with cam wheels, the thickness of which corresponds to the distance between the rows of slots, and the distance between the tops of the teeth is a multiple of the step of the notches, forming a mesh structure, and then in the smoothing stands the mesh structure is shifted with the help of smoothing rollers located in pairs above and below. from the center to the edges with simultaneous horizontal alignment of the mesh surface, while on the inner rows the mesh cells become diamond-shaped, and the side cells form mu triangle with rounded apex, the surplus metal of the longitudinal stretching at the webs between the through-cells are removed by applying knurling in the form of corrugations transverse stretch zone. 3. A method of manufacturing a mesh thermal profile according to claim 2, characterized in that the sequential vertical stretching of the slots from the extreme rows to the center is made not from the edges of the workpiece (tape), but in the central part. 4. A method of manufacturing a mesh thermal profile according to claim 2, characterized in that for the manufacture of a thermal profile of a given cross section, a tape is used as a workpiece with a width less than 2 · (n-1) h.

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