SU1069968A1 - Method of making lightweight girders - Google Patents

Abstract

1. A method of manufacturing lightweight beads, in which the walls of two beams-billets are cut along identical zigzag lines, join and weld parts from different beams-billets along protrusions of a zigzag cut, so that they are made beams with different bearing capacity; the symmetry axes of the zigzag rezd lines are located at different distances from the shelves of the blank beams. 2. POP.1 method, which is also distinguished by the fact that the symmetry axes of the zigzag cutting lines are arranged parallel to the yolk of the blank beams. 3. Method according to Claims 1 and 2, that is, in order to obtain variable cross-section beams, under uniformly distributed loads, the height of the waves forming zigzag cutting lines increases; are from the ends of the blank beams to their middle. 4. The method according to Claim 1, which is also so that, in order to obtain variable cross-section beams under I concentrated load, the symmetry axes of the zigzag cut lines (L are angled to the shelves of the blank beams, the lines of projections and depressions zigzag cutting lines parallel to this axis of symmetry, while one of the parts of each beam of the workpiece is cut across the middle of the protrusion, the cut parts are swapped and welded to each other.

Description

The invention relates to methods for the manufacture of lengthy building structures, namely, metal beams of spaced cross-section with openings in the wall, and can be applied in various types of building structures, for example buildings.

A known method of making lightweight beams, in which the walls of two beams-blanks are cut along identical zigzag lines, joining and welding parts from different beams-blanks along the protrusions of a zigzag cut lil. . to expand the range of sections of beams made on the basis of blanks from one grade “ta.

The purpose of the invention is to provide the manufacture of beams with different bearing capacity.

The goal is achieved by the method of manufacturing lightweight beams, in which the walls of the two blank beams are cut into identical zigzag lines, join and weld parts from different blank beams along the projections of the zigzag cut, the axes of symmetry of the zigzag cut lines are located at different distances from the shelves of the blank beams.

The axis of symmetry of the zigzag lines of the cut are arranged parallel to the flanges of the blank beams.

In order to obtain variable cross-section beams for evenly distributed loads, the height of the waves forming zigzag cutting lines is increased from the ends of the beams to their middle.

In addition, in order to obtain variable cross-section beams under the concentrated load, the axis of symmetry of the zigzag: shaped cutting lines are placed at an angle to the flanges of the bulkheads, and the lines of the projections and depressions of the zigzag cutting lines are parallel to these symmetry axes, while in the middle of the protrusion, the cut pieces change places and weld them together

.Figures 1 and 2 show the zigzag lines of two beams with the symmetry axes of these lines parallel to the flanges of beams / nafig Z and 4 — beams assembled and welded from these blanks; figure 5 and 6 - line zigzag cut two beams-billet at the location of the axes of symmetry of these

lines parallel to the flanges of the beams and increasing the height of the waves of zigzag cutting lines from the ends of the trunks to their middle; in fig. 7 and 8 - beams assembled and welded from these blanks; in Figures 9 and 10, zigzag lines of two beams with the symmetry axes of these lines at an angle to the flanges of the beams; 11 and 12 — beams assembled and welded from these blanks.

The markings of the workpieces with height ft (Figures 1 and 2) begin by drawing zigzag lines on their walls, the symmetry axes of which are spaced from the shelves of the rolled section to various sizes and parallel to them. At the same time, the protrusion lines of these zigzag lines are separated from the shelves of the profiles by different values a and b, C is the wave height of the zigzag cutting lines, t is the pitch of the zigzag line.

The blanks are cut along marking lines into parts 1-6. Parts 2. and 5 are moved and welded at opposite ends of parts 1 and 4. After this, the semi-paws 1.6 and 3.4 are joined in pairs between each other and welded along the protrusions.

Beams obtained in a waste-free way with height b and b have different bearing capacities (Fig. 3 and 4)

In order to obtain variable cross-section beams under uniformly distributed load, the height of the waves forming zigzag cutting lines is increased from the ends of the blank beams (n value) to their middle (m value). With the ends at the ends of the beams, the protrusion lines are separated from their shelves by values o and b, and in the middle of the beam by values c and d.

The blanks are cut by the obtained lines into parts 7-14. Parts 9- and 13 are moved and welded at opposite ends of parts 7 and 11. Parts 7.8 and 11.12 are shifted by 1/2 step, and then joined with parts 14 and 10 and welded along the protrusions

The resulting high resistance spikes have a different carrier.

ability to. I.

To obtain variable cross-section beams for concentrated load, the axis of symmetry of the cutting lines is held at an angle to the shelves of the blank beams, and the lines of protrusions and depressions are parallel to these axes. B) and b at the ends of the beam and at the values of “T and in its middle. In the other blank beam, the projections of the zigzag cutting lines are separated from the shelves by d and t values.

at the ends of the beam and on the values of a and b in its middle.

The blanks are cut into pieces 15-20, Parts 15,16 and 18,19 are rotated around a vertical axis by 180, and then joined with parts 20 and 17 and welded along the protrusions.

The resulting beams of variable cross section have different bearing capacity.

According to the proposed method, beams of various sections 5 and different bearing capacities can be obtained on the basis of the beams-blanks of the same assortment.

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Claims (4)

1. METHOD OF LIGHTENED BEAMS, two beams of blanks are cut along identical zigzag lines, joins and parts from different blanks of beams are joined along the protrusions of the zigzag cut, characterized in that, in order to ensure the manufacture of beams with different bearing capacity, the axis of symmetry is zigzag cutting lines are placed at different distances from the shelves of the beam-blanks. 2. The method of pop. 1, characterized by the fact that the axis of symmetry of the zigzag cutting lines are parallel to the shelves of the beam blanks. 3. The method according to claims 1 and 2, which is characterized in that, in order to obtain beams of variable cross-section. under evenly distributed loads, the height of the waves forming zigzag cutting lines is increased from the ends of the workpiece beams to their middle. 4. The method according to claim 1, which is related to the fact that, in order to obtain beams of variable cross-section for a concentrated load, the axis of symmetry of the zigzag 'cutting lines is placed at an angle to the shelves of the beam-blanks, the lines of protrusions and depressions zigzag cutting lines parallel to these axes of symmetry, while one of the parts of each beam of the workpiece is cut across the middle of the protrusion, the cut parts are interchanged and welded together. S se * “Ί,, '------------: --------------- Aw - olo ¹ —L * W \ 7 ~ V —T ------- 3 't ** Figure 1>