RU73242U1 - HEAVY DUTY ROLLING TABLE ROLLING MACHINE - Google Patents

Abstract

The utility model relates to auxiliary equipment of rolling mills, in particular, to live rolls of hot-rolled plate mills.

The main task solved by the utility model is to reduce production costs associated with ultrasonic metal control.

The proposed feed roller table of a plate mill contains cylindrical rollers of a given size for transporting slabs and is characterized in that with an individual drive and a length of rollers greater than 5.5 of their diameter d, two adjacent rollers are made with the possibility of lifting them up and placing an ultrasonic inspection unit on the free gap of the roller table transported metal; the distance between adjacent rollers in the direction of movement of the metal may be equal to (2.5 ... 2.8) d.

Description

The utility model relates to auxiliary equipment of rolling mills and can be used on plate mills of hot rolling.

For transporting metal (for example, - slabs) to the working stands of rolling mills, feed rolls are used, the designs of which are described in sufficient detail, for example, in the reference book, under the editorship of E.S. Rokotyan "Rolling production", vol. 1 M., Metallurgizdat, 1962, p. 291-294. Most often, live rolls contain cylindrical drive rollers.

A known roller table (device for transporting sheets) of a rolling mill containing rollers with plastic discs and ring magnets between them, which prevents buckling and slipping of the transported sheets (see Pat. Czechoslovakia No. 108261, class B21B, from 08/15/63, ) However, such a roller table is unsuitable for transporting hot slabs.

The closest analogue to the claimed device is the working (supply) rolling table of blooming 1300, described in the book by A. A. Korolev "Mechanical equipment of rolling and pipe shops", M., "Metallurgy", 1987, p. 192-193 and fig. V .2.

This roller table contains cylindrical rollers of a given size for transporting ingots and is characterized in that the first two rollers have an individual drive and the remaining six rollers have a group drive. The disadvantage of this roller table is the inability to install devices on it to monitor the internal defects of the transported metal without a significant increase in the dimensions of the roller table, which will lead to an increase in production costs.

The technical task of this utility model is to reduce production costs associated with ultrasonic testing (ultrasonic testing) of metal (slabs) intended for rolling in stands of a plate mill.

To solve this problem, the feed roller of the specified mill contains cylindrical rollers of a given size for transporting slabs and with an individual drive and the length of the rollers is greater than 5.5 of their diameter d two adjacent rollers are made with the possibility of lifting them up and placing on the vacant gap of the roller table of the ultrasonic monitoring installation of the transported metal; the distance between adjacent rollers in the direction of metal movement can be equal to (2.5 ... 2.8) · d.

The given roller table parameters were obtained during the processing of experimental data and are empirical.

The essence of the proposed technical solution lies in the possibility of placing on the feed roller table of the plate mill installation of ultrasonic testing without increasing the dimensions of the roller table, i.e. without a significant increase in production costs.

Indeed, it is fundamentally possible, with an individual drive of the roller conveyor rollers, to carry out the necessary number of adjacent rollers to move away from its longitudinal line. However, in this case, the overall width of the roller table will obviously increase by at least two times, which will necessitate the displacement (transfer) of equipment or transport tracks located near the roller table. As a result, a significant increase in production costs is inevitable.

The proposed roller table is schematically shown in figure 1.

Two adjacent rollers 1 and 2 of the feed roller table have an individual drive 3, and the supports 4 and 5 of the rollers are installed in separate side walls 6 and 7 of the roller table, spaced at the required distance 8 from the sides 8 and 9 of the roller table. In the middle, the distance between the rollers on

sidewalls 6 and 7 are made loops (rings) 10, which serve to lift the rollers with a bridge crane. The diameter of the rollers is d, their length is L> 5.5d, and the distance between them is l = (2.5 ... 2.8) d.

If it is necessary to selectively control with the help of ultrasonic inspection of the transported slabs, the indicated rollers with the drives are lifted and placed on the vacant gap of the control unit, moreover, in the presence of two cranes, both operations are performed almost simultaneously with the minimum duration of the roller table stop.

An experimental verification of this live roll was carried out at the plate mill 2350 of OJSC Magnitogorsk Iron and Steel Works. The results of the inspection were evaluated by the number of production costs for two versions of the roller table - the proposed one and with the rollers moving out from the longitudinal axis of the roller table.

The minimum additional costs when placing the UZK installation on the rolling table of the mill were obtained using the inventive facility. It was found that for L> 5.5d, the lateral displacement of the rollers will require moving equipment near the roller table, which will cause significant additional costs, as well as requiring the transfer of part of the inside workshop. - d. ways. The best option for placing the ultrasonic testing device on the feed table of the plate mill should be considered the distance between adjacent rollers within l = (2.5 ... 2.8) d, since for l <2.5d an undesirable reduction in the dimensions of the ultrasonic testing device will be required, or the need to lift three rollers, and at l> 2.8d there is a danger of falling short slabs moving along the roller table between the rollers.

The lead roller table, taken as the closest analogue, was not tested in the experiments in view of the above (see) its drawbacks. Thus, an experimental verification confirmed the acceptability of the found

technical solutions to achieve the goal and its advantage over a known object.

According to the technology - economic studies carried out at OJSC MMK, the use of the present invention at the plate mill 2350 of the plant will reduce the production costs associated with metal control by no less than 15%.

Concrete example

The feed roller conveyor of the plate mill hot rolling 2350 is made in accordance with the scheme in figure 1 (see).

Roller table rollers are made with an individual drive and with a length of L = 2200 mm and a diameter of d = 380 mm i.e. L / d≈5.8. the distance between adjacent rollers l = 1000 mm, i.e. l / d = 2.63, and two of them are made with the possibility of lifting them from the roller table to place the ultrasonic testing device in the vacant gap.

Claims (2)

1. The feed roller of a plate rolling mill containing cylindrical rollers of a given size for transporting slabs, characterized in that when the individual drive and the length of the rollers is more than 5.5 of their diameter d, two adjacent rollers are made with the possibility of lifting up and placing on the vacant gap of the installation roller table ultrasonic control of transported metal. 2. Roller according to claim 1, characterized in that the distance between the rollers in the direction of movement of the metal is (2.5 ... 2.8) · d.