RU2255822C1 - Outlet roll fitting of rolling mill - Google Patents

Abstract

FIELD: rolled bar production, possibly in bar, billet and sheet rolling mills.

SUBSTANCE: outlet roll fitting includes outlet liners secured to outlet beam and outlet guides arranged between liners on fitting or guide beams. Outlet guides have stops rigidly mounted on them and engaging with working surface of respective outlet liner. Each stop of guide has length regulated by means of its own screw mechanism. According to invention one of regulated-length stop acts upon foot of guide at rolling process. It prevents shifting of guide along fitting beam and keeps gap values between outlet liners and guide. In the result nose of outlet guide has constant contact with roll along the whole width of guide.

EFFECT: enhanced safety and reliability of outlet fitting operation.

2 dwg

Description

The invention relates to rolling production and can be used on high-quality, blank and sheet mills.

A typical design of a roll reinforcement includes a pair of output rulers fixed on a reinforcing bar of a rolling stand, and a pair of output wires installed between them (Modern design of roll reinforcement of rolling mills. / Album edited by Gritsuk NF M .: NIIINFORMTYAZHMASH, 1968, 295 s .; p. 77), designed to be removed from the rolls of the rolled strip, to prevent them from being tied up by the strip and transferring the metal to the next stand for its further rolling. Each posting (Trishevsky I.S. Postings of rolling mills. M .: Metallurgizdat, 1957, 283 pp .; p. 26, Fig. 25) rests its fifth on a reinforcing or wire bar, and rests on its bottom with its toe (pointed part) on the bottom the corresponding stream cut on the upper or lower roll. For safe operation of the wiring, a snug fit of its toe to the roll is necessary. This is largely achieved by the perpendicularity of the longitudinal axis of the wiring axes of the rolls in the horizontal plane.

In the process, the wiring contacts the lower surface of the sock with the creek of the roll, and the upper surfaces of the sock and heel with a strip passing through the wiring. Typically, the heel of the wiring is located between the rulers installed on the reinforcing bar with some clearance. When rolling the heel of the wiring under the influence of technological loads, it can be displaced along the reinforcing bar by the value of the specified gap, while the toe of the wiring will remain between the shoulders of the stream. As a result, the tight contact of the wiring toe with the roll is broken, which can lead to knocking out of the wiring by the rolled strip and to the subsequent emergency stop of the mill. The total gap between the parts of the reinforcement can be very significant, for example, when rolling channel channels, rails and I-beams, each roll stream is served by several wires (flange and neck), between which additional gaps are also provided when assembling the reinforcing unit. For reasons of ensuring trouble-free operation of the mill, the gaps can only be reduced to a certain limit: for small gaps, the wiring can get stuck between the rulers with the contact between the wire toe and the roll breaking.

To exclude unwanted movement of the heel of the wiring along the reinforcing bar on existing rolling mills, a design is used (Modern designs of roll reinforcement of rolling mills. / Album edited by Gritsuk NF M .: NIIINFORMTYAZHMASH, 1968, 295 pp. 154-157) where the wiring from the sides have vertical walls made in one piece with this part and performing the function of rulers. A pair of such wiring is installed in the housing (box) located on the reinforcement bar of the cage and is rigidly fixed in it by means of metal wedges in the required position. In this case, each wiring has a linear contact of its toe with the roll. The width of such postings is greater than the width of the caliber they serve.

The disadvantage of this design is the violation of the contact between the wiring and the roll during rolling due to the elastic deformation of the rolls, which leads to impacts on the toe of the wiring leaving the rolls of the strip. This may cause damage to this part and the emergency stop of the mill. Due to the circumstances noted, such a design is used only on small-grade and wire mills, where profiles of small sizes are rolled.

A known design of output rolling reinforcement, where to avoid skewing the heel relative to the stream in the gaps between the fifth wiring and the rulers are inserted with a certain tightness of wood blocks (Trishevsky I.S. Postings of rolling mills. M .: Metallurgizdat, 1957, 283 p .; p. 34, Fig. 29, d) in contact with these parts in relatively small areas of their side surfaces.

Design flaws are the possibility of destruction of these blocks during the operation of the roll reinforcement due to the occurrence of significant loads for wood during rolling, and also because of the possibility of contact failure between the roll and the toe of the wiring for a long time: when the rear end of the rolled strip comes out of the roll reinforcement, the wiring toe may rise above the roll and stay in that position thanks to the wedging action of wooden blocks.

There is a known design of output roll reinforcement, where metal brackets are used to prevent wire distortion, worn on reinforcing bars between the fifth wiring and the rulers (I. Trishevsky, Rolling mill wiring. M .: Metallurgizdat, 1957, 283 p .; p. 34, fig. .29, a, b), allowing to control the necessary size of gaps between them.

The disadvantages of this design are the increase in the range of parts of the reinforcing unit, the additional cost of metal for the manufacture of fairly large new parts, as well as the increase in the installation time of the output roll reinforcement in the mill stand.

The closest in technical essence is the design of the output roll reinforcement (Trishevsky I.S. Postings of rolling mills. M .: Metallurgizdat, 1957, 283 pp .; p. 34, Fig. 29, f, g), where to exclude the heel skew relatively remote stops are welded to the wiring from the sides from the sides, in contact with the side surface of the adjacent wiring or ruler, the size of which guarantees the required gaps between the parts.

The disadvantages of this design is the inability to change the gaps during operation by a small amount, which is often required during the rolling process to adjust the position of the wiring in order to change the curvature of the strip leaving the rolls, in addition, when installing wiring with such stops in the cage, an additional adjustment of the latter is often required to obtain the necessary gaps between wiring and rulers.

The technical task is to provide the ability to adjust the position of the heel of the output wiring relative to the working surfaces of the output rulers to maintain constant surface contact across the entire width of the tip of the output wiring with the roll, obtain the necessary technological gaps between the wires and the rulers and fix this position of the wiring in a horizontal plane in combination with the possibility of rotation wiring relative to the heel in a vertical plane during rolling.

In the proposed technical solution, the output rolling reinforcement of the rolling mill, including the output rulers fixed to the reinforcing bar and the output wires installed between them on the reinforcing or wire rods, with stops fixed to them, each of which interacts with the working surface of the corresponding output ruler, characterized in that each wiring stop is made adjustable in length by means of its own screw mechanism.

The drawing shows a sketch of a new design of output rolling reinforcement.

The output roll reinforcement consists of a pair of output rulers 2 installed on the reinforcing beam of the stand 1, between which on the reinforcing beam 1 or on the wire rod 3 located in the rulers 2, the wire 4 is positioned with the necessary clearance, the toe of which is pressed against the roll by its own weight or by means of a counterweight 5 , and the position of her heel between the rulers in the horizontal plane is regulated by screw stops 6, placed on both sides of the longitudinal axis of the wiring on its vertical faces.

The device operates as follows: the strip leaving the rolls, passing through the wiring 4, acts on it, causing the appearance of a force tending to move the heel of the wiring along the reinforcing bar 1 or the wiring bar 3, while the heel of the wiring passes through one of the screw stops 6 placed on it the force of one of the rulers 2, mounted on the reinforcing beam of the stand 1, without causing displacement of the heel of the wiring 4 in the horizontal plane and thereby eliminating its bias in the creek of the roll. In this case, the wiring 4 has the ability to rotate in the vertical plane due to the small frictional moment between the stop 6 and the wall of the ruler 2 compared to the moment from the weight of this part or from the weight of the counterweight 5, which ensures constant contact between the toe of the wiring 4 and the roll.

To reduce the friction between the stops and the rulers that occurs when the wiring is rotated in a vertical plane, it is desirable to sharpen the tops of the stops.

The technical result is the impact on the heel of the wiring of one of the length-adjustable stops during rolling, which eliminates its displacement along the reinforcing bar, thereby contributing to the preservation of the size of the gaps between the output lines and the wiring, thereby ensuring constant contact with the roll of the toe of the output wiring over its entire width, reliability and safety of the output armature are achieved.

Claims (1)

The output roll reinforcement of the rolling mill, including the output rulers fixed to the reinforcing bar and the output wires installed between them on the reinforcing or wire rails with stops fixed to them, each of which interacts with the working surface of the corresponding output ruler, characterized in that each wire stop is made adjustable in length by means of its own screw mechanism.