RU183280U1 - STEEL FITTINGS - Google Patents

Abstract

The utility model relates to metallurgy, in particular to the production of steel reinforcement.

Steel reinforcement, including rolled, heat-treated, pickled, cold-drawn and periodic reinforced bar profiles, moreover, the bar in cross section is made by cold-drawing of an ellipsoid shape, the long axis of the ellipse coincides with the maximum load on the reinforcement, periodic reinforcement profiles are created by four-sided girth of the lateral surface of the ellipsoid cylinder.

The technical result of the utility model is to increase the efficiency and bearing capacity of steel reinforcement.

Description

The utility model relates to metallurgy, in particular to the production of steel reinforcement.

A known device is steel reinforcement, including a bar from a rolling mill, tripartite periodic profiles (patent RU No. 110007, B21C 1/00 (2006.01). Published: November 10, 2011 Bull. No. 31).

The considered steel reinforcement has insufficient bearing capacity.

A device for reinforcing bars of a periodic profile is known (patent RU No. 90719, B21C 1 / 00ul. Published on January 20, 2010 Bull. No. 2).

The known device is characterized by complexity of design and does not provide the required parameters for profiled reinforcement of large diameters.

A device of a reinforcing profile is known for producing a round reinforcing profile in order to reduce production costs for which an oval bar profile is used (patent RU No. 2040987, B21C 1/00. Published: 08/09/1995).

The considered device reinforcement has insufficient bearing capacity.

The closest solution to the claimed utility model in terms of technical nature and the achieved result is the device of a reinforcing laminated bar with a periodic profile (patent RU No. 2471004, C21D 8/08 (2006.01). Published: December 27, 2012 Bull. No. 36).

The considered device of a reinforcing laminated bar has insufficient bearing capacity.

The technical result of the utility model is to increase the efficiency and bearing capacity of steel reinforcement.

The technical result is achieved in the device steel reinforcement, including a bar rolled, heat-treated, etched, cold-drawn, and periodic profiles of reinforcement, and the bar in cross section is made by cold-drawing of an elliptical shape, the long axis of the ellipse coincides with the maximum load on the reinforcement, periodic profiles of the reinforcement are created by a four-sided girth of the side surface elliptical cylinder.

The use of an ellipsoidal shaped steel bar in the cross section, the long axis of which coincides with the maximum load on the reinforcement, improves the load-bearing qualities of such reinforcement as compared to the round shape in the cross section, by increasing the bearing capacity of the geometric shape and its spatial positioning in power loads.

The use of periodic reinforcement profiles created by a four-sided girth of the lateral surface of an ellipsoidal cylinder increases the hook characteristics of the profiles, offsetting more fully the geometric shape of the device.

The increase in the bearing capacity of steel reinforcement ultimately for standard operating conditions increases economic performance.

The device operates as follows.

The high-carbon steel rolled bar heat-treated and pickled is processed on a profiling roller die. At the next stage, the steel bar passes a monolithic die with an elliptical caliber. For a large cross-section of the bar, monolithic dies are used with several approaching calibers to a given ellipse in the cross section of a steel bar. A variant with an intermediate oval-shaped profile of a bar obtained by deformation of a round billet with vertical smooth rollers, followed by an elliptical calibration, is possible. The resulting ellipsoidal steel bar is processed on a profiling roller die in order to obtain an ellipsoid cylinder that is even along the entire length. On a non-driven roller cassette of four rollers with a notch in the form of an imprint of the profile of an ellipsoidal shape of the reinforcement, periodic profiles are applied with four-sided girth of the side surface of the ellipsoid cylinder. The location of the rollers relative to each other can be performed at an angle of 90 °. In order to better work out periodic profiles in sharp vertices of an ellipse, the angles on this side decrease, and for blunt vertices of an ellipse increase.

Steel reinforcement in the cross section of an ellipsoidal shape with a long axis of the ellipse coinciding with the maximum load on the reinforcement gives an increase in bearing capacity. The moment of resistance along the axis of the maximum load, the cross-sectional area of the ellipse with the ratio of the major axis to less than 1.7 equal to the cross-sectional area of the circle of 20 mm, increased 1.286 times, i.e. by + 28.6%. The moment of resistance along the axis of the minimum load, under similar conditions, decreased to 0.754 times or -24.6%. The total moments of resistance along both axes increased 1.02 times, i.e. on 2%.

Information sources

1. Patent RU No. 110007, B21C 1/00 (2006.01). Published: November 10, 2011 Bull. No. 31;

2. Patent RU No. 90719, B21C 1/00 (2006.01). Posted on 01/20/2010 Bull. No. 2);

3. Patent RU No. 2040987, B21C 1/00 (1990.01). Published: 08/09/1995);

4. Patent RU No. 2471004, C21D 8/08 (2006.01). Posted: 12/27/2012 Bull. Number 36.

Claims (1)

Steel reinforcement made in the form of a rolled, heat-treated, pickled cold-drawn bar with a periodic reinforcing profile, characterized in that the bar in the cross section has the shape of an ellipse, the long axis of which coincides with the maximum load on the reinforcement in the conditions of its spatial positioning, while the periodic reinforcing profile made quadrilateral.