RU2677733C2 - Method of manufacturing assembly profile for bearing designs - Google Patents

Abstract

FIELD: construction.SUBSTANCE: invention relates to the field of construction, in particular to a method for manufacturing thin-walled metal profiles. Assembly closed profile is made of two corrugations of the same length and width, which are cut from the profiled sheet, while maintaining a full wave of corrugations. Connection of the corrugated strips is carried out on the basis of a single folded seam, which is additionally bolted. Wooden bars are placed between the corrugations of the closed precast profile with a certain step.EFFECT: technical result of the invention is to increase the carrying capacity of the profile.1 cl, 2 dwg

Description

The invention relates to the field of construction, in particular to a method for manufacturing thin-walled profiles for rod flat and spatial metal structures operating in tension, compression and bending.

There are several ways to make closed welded profiles. The first method is to obtain metal profiles from two steel strips on a roll forming machine. Under the action of horizontal and vertical shafts, steel strips acquire a curved shape, then are welded together to obtain a closed profile [1]. The second method includes a method for producing metal thin-walled profiles from strips of sheet steel of the same length. The sheets are joined by welding along the longitudinal and transverse edges, then the profile gets its shape due to the air pressure supplied to the space between the strips through a special hole [2, 3].

In both cases, to obtain closed welded-bent metal profiles, a large amount of high-quality welding work is required, which prevents the production of the profile of the required dimensions directly at the construction site. This leads to an increase in both the complexity and cost of manufacturing bent metal profiles.

The aim of the invention is to reduce the complexity, timing and cost of production of a metal profile, making it directly at the construction site.

To achieve this goal, profiled sheets of various sizes are used in accordance with GOST 24045-94 "Steel sheet bent profiles with trapezoidal corrugations for construction", which are widely used in civil engineering. In the production of profiles, the types of profiled sheet are used: NS35 - 1000, NS44 - 1000, H57 - 750, H60 - 845, H75 - 750, H114 - 600. A prefabricated closed profile is made of two corrugations 1 of the same length and width that are cut from the profiled sheet while maintaining a full wave of corrugation (Fig. 2). The connection of the corrugated strips 1 is performed on the basis of a single seam 3. In the manufacture of the seam 3, hand tools or electromechanical devices are used. Work on combining corrugations is carried out in several stages. At the first stage, after cutting the profiled sheet into corrugations, an allowance 2 is left at the edges, on the one hand it is 2l + t, and on the other hand l, where l is the width of the seam, t is the thickness of the sheet (Fig. 1). The joint width l is in the range of 15t-25t. Then, along the edge of the allowance of width 2l + t at a distance of l + t from the edge, a bend line is drawn in parallel along which the edge of allowance 2 is bent 90 °. In the same way prepare an allowance 2 of width 2l + t on the second corrugation. At the next stage, the corrugations are applied to each other in a mirror so that the edges with a width of 2l + t are in contact with the edges l + t of another strip, and the bent edges are bent to form a U-shaped lock. Then the resulting lock is compacted until the metal sheets are pressed into each other along the entire length of the element. In the seam of the seam, holes are drilled with a step R, into which bolts 4 are installed (Fig. 2). For additional sealing of the seam, a silicone sealant can be used. This method of joining a profiled sheet allows you to save a protective coating applied in the factory.

To increase the bearing capacity between the corrugations 1 of a closed prefabricated profile with step S, wooden bars 5 of solid wood, impregnated with antiseptics are placed (Fig. 2). The connection of a wooden bar with metal corrugations is carried out using screws 6 (Fig. 2). The proposed placement of the bars reduces the shear forces arising in the seam seams, and also provides local stability of the corrugation belt.

In FIG. 1. shows a corrugation cut from a profiled sheet, in FIG. 2. The prefabricated closed profile is given.

The proposed method for manufacturing closed prefabricated profiles for load-bearing metal structures makes it possible to produce profiles that are convenient for transportation and easy to assemble, which can be used for the construction of temporary structures and low-rise buildings without the use of special lifting equipment.

Information sources

1. Trischevsky I.S., Klepanda V.V. Lightweight Metal Structures (Reference Guide) - Kiev: Budivelnik, 1978. P. 8-11.

2. Denisova A.P. Lightweight metal structures with increased transportability. - Publishing house of Sarat. University, 1989.S. 26-29.

3. Denisova A.P., Efremenkov A.N. A method of manufacturing for load-bearing metal structures: US Pat. RU 2327540 ROS. Federation. N 2006118490/02; declared 01/20/08; publ. 06/27/08. Bull. N 18. - 7 p.

Claims (1)

A method of manufacturing a closed prefabricated profile for rod-bearing metal structures, including the manufacture of strips of the same length and thickness fastened along longitudinal edges, characterized in that for the manufacture of strips a profiled sheet is used, which is cut into corrugations with an allowance at the edges, then the corrugations are mirror-applied to each other to a friend and connect with longitudinal single seams, in which holes are drilled with a step R to install bolts, then between the corrugations with a step S, wooden b The pieces of hardwood, impregnated with antiseptics and connected with corrugations with screws.

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