RU2391167C1 - Method and device for winding metal strips onto holder - Google Patents

Abstract

FIELD: mechanics. ^ SUBSTANCE: invention relates to method and device for winding of metal strips onto holder arranged in coiler shaft, to which strip is delivered by feeding device having upper and lower feeding rollers, besides there is a table provided for direction under the strip, and over the strip there is a rotary changing device for strip and rotary cover of shaft adjacent to it and passing almost to winding holder. In method longitudinal pulling force applied to metal strip for control of its motion is identified with the help of tension measurement mechanism installed in shaft and pressed from top into strip, and measurement signal is delivered to controller of feeding device. In device for winding changing device of strip is arranged in the form of tension measurement mechanism pressed from top into strip and is equipped with changing device frame, having lever with roller on front end installed with the possibility of rotation, besides between body and roller lever there is a dynamometre arranged, which is connected to controller by signal. ^ EFFECT: due to measurement of strip tension in coiler shaft, feeding device is adjusted so that strip travel makes its winding into roll with straight edges possible. ^ 12 cl, 4 dwg

Description

The invention relates to a method and apparatus for winding metal strips on a mandrel located in a winder shaft, to which the strip is fed by a feeding device having an upper and lower feed rollers, for which a table is provided under the metal strip, and above it is a transfer device for the strip and almost adjacent to the mandrel rotary shaft cover.

The feeding device known from DE 19520709 A1 has a stationary lower roll and an upper roll which is adjustable with respect to it. The adjustable upper roll is supported in a frame moved by the hydraulic cylinder, formed by two opposite wings, which in the area of their common axis of swing are connected by a base supported in the frame on both sides. The wings of this feeding device are regulated by individually loaded hydraulic cylinders, and the base connecting the wings is made as a torsion spring.

Due to the introduction of different adjusting forces with a relatively small difference in the forces in the hydraulic cylinders, it is possible to obtain different angles of rotation of the wings, and thereby an adjustable upper roll. Due to its turns, it is possible to influence the pulling force of the strip created by the feed device and thus establish the distribution of the pulling force.

A measuring roller is known from DE 19704447 A1 for measuring the flatness of a stretched rolled strip in hot rolling mills. One or more of these measuring rollers, which are pressed against the rolled strip from below, can be placed between the stands of the finishing rolling mill, and / or behind the latter in the direction of rolling by the stand of the finishing rolling mill, and / or in front of the feeding device for the coiler, and / or between the feeding device and a coiler. With the measuring roller located between the feeding device and the coiler, the measurement value obtained for measuring the rotation of the feeding device can be used and thus the strip travel when winding on the mandrel.

Thanks to DE 19953524 A1, a loop former is known which can measure the wedge-shaped width of a strip using the longitudinal tension present in it. For this, the looper has a roller supported on both sides in the corresponding pivoting levers. Both levers with a hinge are divided into a shaft lever and a roller lever and are connected with the looper shaft. The hinge transfers the force exerted by the tape to the looping machine’s roller located below the strip below the force to the dynamometers located on the pivoting levers. This force is correlated with the longitudinal tension, so that it can be calculated from these measured forces. To prevent the lifting of the roller lever by a dynamometer, the shaft lever and the roller lever are connected to each other by a holding element. Due to either the total longitudinal tension or the calculated fraction of the wedge, it is possible to adjust the input and output devices, made, for example, as stands or feeding devices, according to the rotation frequency or the installation angle of the rolls.

The basis of the invention is to improve the method and device of these types in order to provide an improved measurement of the tension of the metal strip in the shaft of the coiler, which should be used so that the feed device regulates the course of the strip so that a straight edge of the roll can be provided.

According to the invention, this problem is solved due to the fact that the longitudinal pulling force applied to the metal strip to control its movement is determined using a winder located in the shaft and pressed into the strip from the top to measure its tension, and the measuring signal is fed to the regulator of the feed device. By turning from above onto the strip according to the invention of the mechanism for determining the longitudinal tension, it is possible, in particular, to maintain the optimum angle of girth at the end of the strip. When turning the mechanism from below, this would not be possible, since in this case the angle of coverage would be greatly limited by the necessary transfer device for the strip, including the shaft cover, and would be so small that precise measurement would not be possible at the end of the strip. However, the measurement at the end of the strip is especially important, since here the direction of the strip is extremely difficult due to the lack of tension in the group of stepwise arranged finishing stands of the rolling mill.

According to the invention, it is proposed to determine the existing wedge-shaped distribution of tension, due to the longitudinal tension of the strip in width, by the measured forces on the supports of the mechanism for determining the tension of the strip, which is pressed into the metal strip at a certain angle of girth.

To this end, according to a preferred embodiment of the invention, a girth angle is used to directly or indirectly measure the force on the support, produced by pressing a roller into the metal strip by a mechanism for determining longitudinal tension. The girth angle provides the transfer of force from the metal strip to the roller and from it to the dynamometer built into the mechanism.

To actuate the mechanism for determining the tension, at least one cylinder is required, and according to the invention, a working oscillating cylinder with stroke control acting on the pivot arm located on the rear sides. Alternatively, two swing cylinders may be used. Another possibility for actuating the above mechanism is that it is mounted in a U-shaped frame, which is affected by a cylinder located on the axis of symmetry of the frame.

It is recommended that the girth angle be kept approximately constant by adjusting the immersion depth of the roller. The angle of coverage depends on the stroke of the swinging cylinder or cylinders and on the diameter of the wound roll. In order to maintain the optimum grip angle during the entire winding process, the stroke of at least one swinging cylinder can be adjusted. The set value during winding can be calculated depending on the instant diameter of the roll, the optimal angle of girth and geometric data. To register the course, you can install a displacement meter in the rotary cylinder or on it; alternatively, a swivel strip tension measuring mechanism can be equipped with a goniometer so that the stroke of the swinging cylinder can be calculated. The instant roll diameter can be determined from the measured speed of the mandrel and the thickness of the metal strip. Alternatively, a direct measurement of the diameter of the roll is also proposed, for example, by laser-optical means.

According to a further preferred embodiment of the invention, the roller of the mechanism for measuring the strip tension before turning is accelerated to the speed of the strip. Since the roller rotates onto the strip during winding, due to the preliminary acceleration, damage to the metal strip can be eliminated if the subsequent acceleration is necessary otherwise. The roller drive may be mechanical and / or electric and / or hydraulic.

A device for solving the problem underlying the invention, in particular for implementing the method, differs according to the invention in that the transfer switchgear for the strip is designed as a mechanism for measuring its tension that rotates from above onto the strip and is equipped with a housing that has a pivotable roller arm at the front end, and between the housing of the transfer device and the roller lever is a dynamometer, which is connected to the regulator of the feed device by signal. The tension measuring mechanism according to the invention thereby simultaneously fulfills the classical function of an arrow for a strip. From a non-working position, i.e. elevated standby position, the whole mechanism rotates counterclockwise down to the working one, i.e. immersed in a metal strip position, and directs it to the winding mandrel while simultaneously activated measurement.

The function of the tension measuring mechanism as an arrow of the tape is preferably supported by the fact that at least the front of the table feeding device adjacent to the lower roller under the metal strip is designed as a rotary table. It rotates around the axis of the lower feed roller counterclockwise.

According to a preferred embodiment of the invention, the housing of the transfer device connects the rear and front levers of the belt tension measuring mechanism. If there is only one cylinder that would be located at the rear, on the drive side, the housing of the transfer mechanism, as a connection between the rotary lever on the drive side and the rotary lever on the control side, receives a torsional load, which occurs due to the unilateral action of the mechanism, driven by only one swinging cylinder on the rear, respectively drive side.

If the drive roller of the transfer device is preferably located on the rotation axis of the tension measuring mechanism remote from the lever receiving the drive roller, the metal strip can be protected from damage if it is guided by the adjoining shaft of the winder along the path from the lower roller of the feed device to its next roller.

An embodiment of the invention provides that a tension measuring mechanism with a roller lever on the opposite side of the winding mandrel is integrated into the top shaft cover. With this arrangement, a combination of the tension measuring mechanism and the shaft cover takes place. The front roller of the mechanism would be adjacent to the shaft cover, reaching the first pressure roller of the winding mandrel, and the free space to the top roller of the feed device would be filled with a conventional transfer device.

The following features and details of the invention arise from the claims and the following description of an embodiment of the invention presented in the drawings. Showing:

- figure 1, in a schematic representation of a side view of a traditional, corresponding to the prior art mine winder;

- figure 2, in a schematic view, a side view of the winder shaft with a mechanism for measuring its tension, rotating at the top into a metal strip, simultaneously performing the function of a transfer switchgear for the strip and in an inoperative position raised above the strip;

- figure 3, the object of figure 2 with the tension measuring mechanism turned to the measuring or working position shortly before the end of the winding process;

- figure 4, a fragment of a section through the roller of the transfer device installed in the tension measuring mechanism.

The winder shaft 1 shown in FIG. 1 in a traditional embodiment adjoins a rolling mill or a group of stepwise arranged stands of a finishing mill for winding a rolled metal strip 2 onto a mandrel 3 into a bay or a roll 4 (see FIG. 3). The strip is fed to the mandrel 3 by a feed mechanism, from which only the upper and lower feed rollers 5, 6 are shown here. From the lower roller 6 to the mandrel 3, the table 7 adjoins the strip from the bottom. The beginning or end of the strip thus supplied is received by the first interacting with the mandrel 3 a pressure roller 8 or several such rollers distributed around the circumference.

Above the metal strip is a transfer device 9, which is in the standby position adjacent to the feed roller 5. The transfer device 9 is rotated by a cylinder 10, which with its rod acts on the pivot arm of the transfer device 9. The winder shaft 1 is closed from above by a cover 11 extending from the transfer device 9 to mandrels 3. To rotate the cover 11, a cylinder 12 is attached to it.

In the exemplary embodiment of the winder shaft 1 shown in FIGS. 2, 3, the details matching the above shaft variant are marked with the same reference numerals. An important difference here is that the strip tension measuring mechanism 13 simultaneously functions as a strip transfer device. This mechanism consists of a pivoting lever 14 located on the rear or on the drive side and a front lever 14, of which only the first is shown in FIG. Both levers 14 are interconnected by the torsion-sensing case 15 of the transfer device (see Fig. 4). In addition, it has a roller lever 16, at the front end of which there is a drive roller 17. The lever 16 is rotated in the hinge 18. To eliminate tipping due to gravity, the lever 16 is held in position by the element 19.

As soon as the tension measuring mechanism 13 turns on top of the metal strip 2 and is pressed into it by its roller 17 to form a girth angle, a force begins to act through the roller 17, which loads the lever 16 clockwise. However, the rotation of the lever in this direction is prevented by the holding element 19, made in the form of a dynamometer 20, which rather provides support for the lever 16, determines the force produced by the support in the axis 21 and how the measuring signal transfers it to the controller 22 of the feeding device (see Fig. 3). The feeding device according to the measurement results can, for example, by turning the upper and / or lower roller 5, 6 or parallel rotation of both rollers, or by setting different closing forces on the drive and control side, provide a mandrel 3 of roll 4 with straight edges.

The tension measuring mechanism 13 at its rear end in the direction of movement of the strip remote from the roller 17 end is provided with a roller 23 of the transfer device provided on its axis of rotation, as shown in FIG. 2, 3 in the form of a cross-section in the area of the pivot arm 14 through the pin of the roller 23. Here, the winder shaft 1 is also closed from above by the cover 12 turning by the cylinder 12. The table 7 guides the metal strip 2 and extends from the lower roller 6 to the mandrel 3, at least at its front end, it has a rotary table 24 that moves counterclockwise around the axis of the lower roller 6 of the feed device.

Figure 3, which shows the working position shortly before the end of the winding process of the roll 4 from the metal strip 2, allows you to see, on the one hand, the angle of circumference, which the strip 2 forms due to the pressing of the roller 17 of the tension measuring mechanism 13 into it. On the other hand, the dashed lines show various measuring or control signals 25, 26 which are introduced into or out of the regulator 22 to the means for turning the upper and lower rollers 5, 6 (see dashed lines 26). The parameters important for determining and, if necessary, keeping constant the optimal angle of girth during the entire winding process are set, for example, by measuring the stroke of the swinging cylinder or the stroke of the swinging cylinders 10 of the tension measuring mechanism 13, and the cylinder / cylinders are equipped with displacement meters, as well as measurements of the rotation angles of the mechanism 13 and the instantaneous diameter of the roll 4. This diameter can be calculated by the measured number of revolutions of the mandrel 3 (see the dashed line 25 emanating from it) and the thickness of the strip. Additionally, it is possible to directly measure the diameter of the roll 4 using laser-optical means 27.

In any case, it is possible to have a measuring signal in the form of the result of measuring the tension of the strip for controlling the feeding device. An alternative in the described embodiment may be the combination of “a mechanism for measuring the tension of the strip - transfer device for the strip” or “mechanism - the cover of the shaft. The mechanism 13 shown in FIGS. 2, 3 with its roller 17 directed from the mandrel 3 could be integrated into the shaft cover, which is reflected by line AA in FIG. 2. The free space from the front roller 5 to the mechanism 13 could then (with this option) be filled or blocked by a conventional transfer device 9 for the strip (see figure 1).

LIST OF MAIN POSITIONS

1 - winder shaft

2 - metal strip

3 - winding mandrel

4 - bay / roll

5 - upper feed roller

6 - lower feed roller

7 - table (guide table)

8 - pressure roller

9 - transfer device for the strip

10 - cylinder

11 - shaft cover

12 - cylinder

13 - strip tension measuring mechanism

14 - rotary lever

15 - housing transfer device

16 - roller lever

17 - roller

18 - hinge

19 - holding element

20 - dynamometer

21 - axis of the dynamometer

22 - feed controller

23 - roller transfer device

24 - rotary table

25 - measuring signal

26 - measuring signal

27 - laser-optical measuring tool

Claims (12)

1. The method of winding metal strips (2) on a mandrel (3) located in the winder shaft (1), to which the metal strip is fed by a feeding device consisting of upper and lower feeding rollers (5, 6), and for the direction of the strip (2) a table (7) is placed under it, and above it is a transfer device for the strip and a rotary shaft cover adjacent to it and extending almost to the winding mandrel (3), characterized in that the longitudinal pulling force applied to the metal strip (2) for control its movement is determined with p By the power of the mechanism (13) located in the shaft (1) and pressed from above into the strip of the mechanism (13), the measuring signal is fed to the feed device regulator (22). 2. The method according to claim 1, characterized in that the wedge-shaped distribution of the pulling force is determined by the measured forces on the bearings of the mechanism (13) for measuring the strip tension. 3. The method according to claim 1 or 2, characterized in that for direct or indirect measurement of the forces on the supports of the mechanism (13), use the girth angle produced by the roller (17), immersed when the mechanism (13) for measuring the tension of the strip is turned into a metal strip ( 2). 4. The method according to claim 3, characterized in that the girth angle is maintained approximately constant to control the immersion depth of the roller (17). 5. The method according to claim 3, characterized in that the roller (17) before the rotation of the mechanism (13) is accelerated to the speed of the strip (2). 6. A device for winding a metal strip (2) on a mandrel (3) located in the winder shaft (1), to which the strip is fed by a feeding device having upper and lower rollers (5, 6), and for direction under the metal strip (2) a table (7) is provided, and above it there is a strip transfer device and a shaft cover (11) adjacent to it and extending almost to the winding mandrel, characterized in that the transfer device is made in the form of a mechanism installed with the possibility of rotation from above into a metal strip (2) (13) measuring tension and s fitted with a housing (15) of a transfer device having a roller lever (16) mounted rotatably and bearing a roller (17) at its front end, and a dynamometer (20) located between the housing (15) and the roller lever (16), which the signal is connected to the controller (22) of the feeding device. 7. The device according to claim 6, characterized in that the housing (15) of the transfer device connects the rear and front rotary levers (14) of the tension measuring mechanism (13). 8. The device according to claim 7, characterized in that on the rear side of the swing arm (14) there is at least one swinging cylinder (10) with an adjustable stroke. 9. The device according to one of claims 6 to 8, characterized in that the roller (17) located on the lever (14) is driven. 10. The device according to claim 6, characterized in that the drive roller (23) of the transfer device is located on the axis of rotation of the mechanism (13) remote from the roller arm (16). 11. The device according to claim 6, characterized in that at least the front portion adjacent to the lower feed roller (6) under the metal strip (2) of the table (7) is made in the form of a rotary table (24). 12. The device according to claim 6 or 7, characterized in that the tension measuring mechanism (13) with the roller lever (16) on the opposite side of the winding mandrel (3) is integrated into the top cover (11) of the shaft.

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