SU1249124A1 - Method of producing i-beams with checkered perforations in web - Google Patents

Description

The invention relates to methods for making lightweight metal beams.

The aim of the invention is to reduce the labor intensity.

FIG. 1 shows a beam with a marking of the cutting line, general view; Fig.2 is a diagram of the assembly and welding of a lightweight beam; in fig. 3 is a section A-A in FIG. 2

The method is carried out as follows.

The initial cutting beam is the rolling profile.

The marking of the cutting line 1 is performed on a section of the beam of length f ,, determined on the basis of the bearing capacity of the beam on the bending moment; The position of this section depends on the type of load that is perceived by the beam and on the type of its supporting fixtures.

The initial beam is cut into parts 2 and 3 with the help of automatic or semi-automatic oxygen cutting equipment, which ensures the quality of the cut, which allows welding without machining the edges.

The assembly of the lightweight beam consists in extending the parts 2 and 3 times of the cut beam in the direction of the longitudinal axis of the beam5, while ensuring that the planes of the walls of the joined parts 2 and 3 coincide. The size of the separation depends on the length of the welds 4, the cut beam on the part of bo

Compiled by G, humble Editor L. Gratillo Tehred L. Oleinik

4208/30 Circulation 718

VNIIPI State Committee of the USSR

for inventions and discoveries 113035, Moscow,, Raushsk nab., 4/5

Cor Pod

Production and printing company, Uzhgorod, st. Project, 4

249124, 2

the edges of the protrusions 5. and is determined on the basis of the carrying capacity of these seams.

In this case, the cut lines in the sections, 5 along which the beam elements are displaced and joined, are outlined along straight lines parallel to each other.

Such an embodiment of the cutting line allows immediately after cutting the 0 beam elements in the direction perpendicular to the longitudinal axis of the beam, and then immediately join them to the side edges of the protrusions, which reduces the time and labor intensity of the assembly,

The welding of parts 2 and 3 of the beam should be carried out predominantly by highly efficient methods: automatic or semi-automatic with 20 fluxes, B protection gas gases, powder wire, high-speed electrodes, etc. The welding materials used and welding conditions should ensure uniform strength of the seam 25 and the base metal.

Due to the short length of the cut line, the initial beams according to the invention arise: slight deformations of the parts of the beam after cutting from the initial stresses arising after rolling. This allows the use of less complex and less material-intensive devices to ensure the immobility of the original beam during cutting and the nondeformability of parts of the cut beam during their subsequent assembly.

Proofreader L, Zimokosov Subscription

Claims (1)

METHOD FOR PRODUCING TWO-TILE BEAMS FROM CHESS PERFORA CHILE OF THE WALL, including cutting the wall of the workpiece in a broken line to obtain two elements with protrusions, sliding the elements in the direction perpendicular to the longitudinal axis of the beam, and joining them to part of the side faces of the protrusions, characterized in that, in order to reduce the complexity, the cut line is sections along which the beam elements are displaced and joined, is outlined along straight lines parallel to each other. ^z 2 - _ g to---------------------------, a figure 1