SU614834A1 - Flanged rolled profile - Google Patents

Description

(54) FLANGE ROLLED PROFILE

The invention relates to rolling production and construction equipment, and more specifically to the construction of channel-type steel beams used for the manufacture of metal structures, structures, machines and mechanisms operating in transverse bending.

All known constructions of hot-rolled channel bars, both domestic and foreign, have shelves that are completely turned to one side from the outer wall of the flj profile wall.

The outer planes of the shelves form, with the outer plane, walls, as a rule, straight non-blunt corners or right angles blunt by an arc of a circle.

The transverse bending of the channel beam; the profile is accompanied by the deplanation of its cross section, in connection with which the distribution of longitudinal stresses on the surface of both the compressed and the extended shelves is characterized by considerable unevenness.

I-beams do not have these drawbacks, but their manufacture by rolling is more complicated than channel bars. Due to the reversal of the shelves at the skating rink of the channels, it is possible to use intensive crimping, to reduce the specific consumption of rolls and 9ergin. Thus, the known schaeophiles possess, on the one hand, a reduced n & land capacity when using sludge as beams, but on the other hand, they are simpler to produce on rolling mills than I-beams.

The invention of the invention is the creation of such a flange rolling prof, which, with the same overall dimensions and lower mass of the meter, would have an increased tpochennost and non-drying capacity when working in transverse bending and would be more simple to manufacture by hot rolling compared to dvutavrovym. cross section, but also in comparison with limestone profiles of the channel section.

Claims (1)

This is achieved by the fact that the flange rolling profile containing the wall and jBOBHbie flanges on one side with inner slope, the outer planes of which are mutually parallel, and the inner joints with the wall of the rounding bar, is equipped with shortened shelves adjoining the wall opposite the main shelves, which mate with the wall in an arc, starting from the end of the shortened flange. The drawing shows the proposed flange rolling profile, the cross-section. The profile has a wall 1, a main shelf 2, an arc 3 of the interface of the wall with a base shelf, a shortened shelf 4, an arc 5 of the interface of a shortened shelf with a wall. The letter designations in the drawing have the following meaning: fi - profile height (t) profile width, 5 - wall thickness, c - width of the shortened shelf, t- thickness of the shortened shelf, T average thickness of the main shelf. The proposed flange rolling range has several advantages both at the manufacturing stage and when used as a beam. When rolling known channels, a load from a split caliber, so-called false flanges are formed, which are to be removed in subsequent calibers. In the described flange rolling profile, the metal of the false flanges is useful to form shortened shelves 4. Therefore, the wear resistance of gauges when rolling this flanged rolling profile is significantly increased compared to channel gauges, in which the maximum wear is located near the angles formed by the wall with shelves. The curvature of the rods during cooling of the rolling mill profile is reduced due to a decrease in the degree of asymmetry of its cross section. For the same reason, useful residual stresses, which increase the bearing capacity of the proposed flange rolling profile, are more preserved. The decisive advantage is a substantial increase in the strength of the flange rolling profile when working on a cross bend, thereby making it possible while maintaining the standard overall dimensions in height f | and width b to reduce the weight of a meter of profile compared to the same channel size. The width of the shortened shelves when building a profile is taken in the range from i to 3 thicknesses of 5 walls. The flange rolling profile can be widely used in assemblies, structures and machines instead of known channels. The efficiency of lightweight flange rolling profiles is provided both under production conditions and in their consumption zones, since their use instead of well-known channels significantly reduces the metal intensity of the structures and simplifies the production process on npt mill mills. Claims lower running weight profile, it is equipped with shortened shelves adjacent to the wall on the side opposite to the main shelves, having a width equal to from 1 to 3 wall thicknesses and conjugated with the wall along the arc, starting from the end of the regiment . Sources of information taken into account in the examination: 1. GOST 8240-56.