UA92829U - The device for measuring deformation of metal between the rollers rolling mill - Google Patents

Abstract

The device for measuring deformation of metal between the rollers rolling mill comprising upper and lower probes, oppositely arranged relative deformation and rolling bearing structures installed near the cage, and articulated with the aforementioned probes sensors move. On one of the upper and lower probes centered on each barrel roll and at least one schupu installed along the barrel roll at an equal distance from each side of each central probe. In addition, at the end of each video probe attached with the possibility of constant contact with the surface of barrels upper and lower rolls. Movement sensors linked to automatic thickness adjustment metal.

Description

The useful model belongs to metallurgical engineering, namely to the equipment for processing metals by pressure. The technical solution can be used in the rolling cages of the hot and cold rolling mills to determine the geometric parameters of the gap between the rolls in the process of metal deformation, and especially during hot rolling of non-ferrous metals. Various devices and equipment are used to control and adjust the gap between the rolls in the process of metal rolling on rolling cages of hot and cold rolling mills. At the same time, it is very important to have information about the gap in the center of deformation, and therefore about the thickness of the metal, directly during the process of its deformation or immediately after it, that is, without a time delay. For these purposes, various methods and devices are used to determine the gap between the rolls of the rolling cage by measuring the distance between the elements of the roll assemblies.

As the closest analog (prototype), the device for measuring and registering the gap between a pair of working rolls was chosen due to the determination of the position of the ends of the rolls' barrels in places opposite to the center of deformation (patent ЮОЕЕ 4 203 469). The gap between the rolls is measured by determining the position of the ends of the roll barrels in a non-contact way or with the help of probes interacting with the same ends of the rolls, and further converting the measurement results into a signal characterizing the solution (gap) of the rolls. At the same time, the measuring system is equipped with a thickness gauge, the signal from which and from the devices that control the position of the ends of the rolls are sent to the computing unit. In the computing unit, the results of determining the position of the ends of the roll barrels are processed taking into account the elastic and thermal deformation of the set of rolls depending on the rolling force, and are also corrected based on the results of the thickness measurement using a thickness gauge installed on the output side of the cage.

The disadvantage of the decision taken as a prototype is that with such a measuring tool, only the distance between the ends of the rolls is registered, that is, only at the two extreme points of each roll, and the behavior of the rolls (bend) during the rolling process is not controlled. This, accordingly, does not allow measuring the shape of the gap between the rolls during the rolling process, and therefore the profile (shape) of the staff, which depends on such factors as the width of the rolled product, the force of rolling, and the mechanical properties of the rolled product along its width and length.

Therefore, the measurement error at two points located at the ends of the rolls is forced

To be compensated by feedback from the thickness measurement at the exit from the cage using a thickness gauge. To obtain rolled products with the necessary thickness deviations, both along its length and width, and in accordance with the permissible flatness of the staff, a thickness gauge is needed, which would measure the thickness of the rolled product along its length and across its width. According to the additional correction signal from the thickness gauge, the necessary gap between the rolls is established during the rolling process itself. At the same time, due to the fact that the thickness gauge is at some distance from the cage, the signal from it enters the control system with a delay. In turn, this leads to the fact that areas with varying thickness and unevenness may appear on the headquarters, which exceed the permissible limits. In addition, due to the use of support shoes on the probes, which slide along the ends of the rolls, the reliability of the measurements subsequently deteriorates. This is due to the presence of sliding friction in the places of contact of the shoes with the rolls, which leads to wear of the shoes and the ends of the rolls in the place of their contact.

The useful model is based on the task of improving the quality of metal in terms of thickness and flatness.

The task is solved due to the technical result, which consists in increasing the accuracy of measurements of the center of deformation of the metal between the rolls of the rolling mill directly during rolling due to the increase in the number of measurement zones.

To achieve the above technical result, a device for measuring the center of deformation of the metal between the rolls of the rolling cage, containing upper and lower probes, located oppositely relative to the center of deformation and movably installed on the supporting structure next to the cage, as well as displacement sensors articulated with the aforementioned probes, connected with an automatic metal thickness control system, according to a utility model, it is equipped with additional upper and lower probes, with one of the upper and lower probes located in the center of each barrel of the roll and at least one probe installed along the barrel of the roll at an equal distance on each side from each central probe, in addition, a roller is fixed at the end of each probe with the possibility of constant contact with the surface of the barrels of the upper and lower rolls.

As a result of a comparative analysis of the proposed device for measuring the center of metal deformation between the rolls of the rolling mill with the prototype, it was established that they have the following general characteristics:

- the upper and lower probes are oppositely located to the center of deformation and are movably mounted on the supporting structure next to the cage; - displacement sensors articulated with probes are connected to the system of automatic adjustment of metal thickness, as well as distinguishing features: - equipping with additional upper and lower probes; - one of the upper and lower probes is located in the center of each roll barrel; - at least one probe is installed along the roll barrel at an equal distance on each side from each central probe; - a roller is fixed at the end of each probe with the possibility of constant contact with the surface of the barrels of the upper and lower rolls.

Thus, the proposed device for measuring the center of metal deformation in the rolling cage has a new design of nodes and parts, new parts, additional connections of nodes and parts, as well as a new arrangement of them relative to each other.

There is a cause and effect relationship between distinctive features and the technical result that is achieved.

Due to the fact that the device for measuring the center of metal deformation in the rolling cage is equipped with additional upper and lower probes, while one of the upper and lower probes is located in the center of each barrel of the roll and at least one probe is installed along the barrel of the roll at an equal distance from each side from each central probe, in addition, a roller is fixed at the end of each probe with the possibility of constant contact with the surface of the barrels of the upper and lower rolls, it became possible to form information about the size and shape of the gap between the working rolls based on the control of the position and curvatures of the surfaces of the upper and lower working barrels rolls (for the "Duo" cage) or support rolls (for the "quarto" cage), as well as accurately determine the geometric parameters of the center of metal deformation and reliably output information about the geometric parameters of the metal to the control system for automatic adjustment of the metal thickness.

Exclusion of at least one of them from the above set of distinguishing features does not ensure the achievement of a technical result.

The claimed technical solution is not known from the prior art and is therefore novel.

The technical solution that is claimed is industrially applied, because its technological and technical implementation does not present difficulties. According to this technical decision, the technical design of the rolling cage "quarto" of the 2840 mill of hot rolling of aluminum of OJSC "KUMU3" was completed.

Kamensk-Uralsky, Russia.

Thus, a utility model that is claimed can be granted legal protection because it is new and industrially applicable, that is, it meets the criteria of a utility model.

A useful model is explained by the drawings, which show: in fig. 1 - a device for measuring the center of metal deformation between the rolls of the rolling cage in fig. 2 - section A-A in fig. 1.

The device for measuring the center of metal deformation between the rolls in the rolling cage (Fig. 1) contains upper probes 1 and lower probes 2, which are movably mounted on a supporting stationary structure C, fixed on the foundation next to the cage (for example, "quarto") with a pressure device 4. The upper and lower probes 1 and 2 are installed along the sides of the rolls 5, 6 (for example, the support rolls in the "quarto" cages) and are located on the opposite side of the center of metal deformation 7.

The probes are located in such a way that among the upper and lower probes, the central probes 8 are installed in the center of each roll barrel 5, 6, and at least one probe 9 and 10 is installed at an equal distance from each side of each central probe 8 (Fig. 2). All upper and lower probes 1, 2 are connected to displacement sensors 11, 12, which are connected to the automatic metal thickness adjustment system (SART) 13 (Fig. 1). At the end of each probe, a roller 14 is fixed with the possibility of permanent contact with the surface of the barrels of the upper and lower rolls 5, 6. The rollers 14 are made of wear-resistant material and equipped with rolling bearings. To measure the rolling force, the cage with a device for measuring the center of metal deformation is equipped with force sensors 15.

The device for measuring the center of metal deformation between the rolls of the rolling mill works as follows.

Taking into account that under the action of the rolling force, the rolls are flattened at the point of contact with the metal, as well as at the points of contact of the barrels of the working rolls with the support rolls 5, 6, therefore, before the start of rolling, the dependence of the deformation (flattening) of the rolls on the rolling force is determined. For this, the rolls 5, 6 are reduced by the pressure device 4, and the readings of the displacement sensors 11, 12 are reset to zero, after which the cage is gradually loaded by the pressure device 4, while the readings of the displacement sensors 11, 12 and force sensors 15 are recorded. The signals from the displacement sensors 11, 12 and force sensors 15 are sent to the automatic metal thickness control system 13. Based on the received data, a curve of the dependence of the deformation (flattening) of the rolls on the rolling force is built, which is memorized by the automatic metal thickness control system 13 for further consideration when determining the geometric parameters rolling (spots of metal deformation in the rolling cage) during its rolling.

When starting the rolling stock, the operator enters into the system of automatic thickness control (SART) 13 initial parameters related to the rolling mode and geometric parameters of the resulting rolled product. After the metal is captured by the working rolls, the latter are deformed under the action of the rolling force and take on a shape different from the original initial one.

Deformation of the rolls (flattening in the places of mutual contact between the support and working rolls, as well as the contact of the working rolls with the metal) and a change in the shape of the rolls (sags) occur under the action of the rolling force. Based on the rolling force measured by the sensors 15, the automatic thickness control system (SART) 13 determines the deformation (flattening) of the rolls according to the previously constructed curve of the dependence of the deformation (flattening) of the rolls on the rolling force. The change in the shape of the rolls (deflections) is recorded by the movement sensors 11 and 12. The corresponding movements of the sensors 11 and 12, which reflect the actual bends of the rolls, are transmitted by the upper and lower probes 1, 2 articulated with them. At the same time, the rollers 14 at the ends of the probes are in constant contact with surface of the barrels of the rolls 5, b and roll over it during the rolling process.

The information from the movement sensors 11 and 12 concerning the bends of the rolls and from the force sensors 15 (indirect information about the flattening of the rolls) is immediately processed by the automatic thickness control system (SART) 13. At the same time, the geometric parameters of the deformation cell 7 are determined in real time, and accordingly, the geometric parameters of the rolling stock. After processing the received information, if necessary, appropriate control signals are issued to the cage devices, which regulate the solution of the rolls and control the bending and anti-bending of the rolls, in order to obtain rolled products with the necessary parameters in terms of thickness and flatness.

Thus, the use of a device for measuring the center of metal deformation in the rolling cage, made according to the formula of the useful model, will allow to increase the accuracy of the measurement

From the center of deformation of the metal between the rolls of the rolling mill directly during rolling, due to the increase in the number of measurement zones, and thereby improve the quality of the rolling metal in terms of thickness and flatness.

Claims (1)

USEFUL MODEL FORMULA A device for measuring the center of deformation of the metal between the rolls of the rolling cage, containing upper and lower probes, which are oppositely located relative to the center of deformation and movably installed on the supporting structure next to the cage, as well as displacement sensors articulated with the aforementioned probes, connected to the automatic thickness control system metal, which is characterized by the fact that it is equipped with additional upper and lower probes, while one of the upper and lower probes is located in the center of each barrel of the roll and at least one probe is installed along the barrel of the roll at an equal distance on each side of each central probe, except moreover, a roller is fixed at the end of each probe with the possibility of constant contact with the surface of the barrels of the upper and lower rolls.