JPH03198907A - Roll and device for preventing meandering of strip - Google Patents

Abstract

PURPOSE:To improve the correcting force of meandering by providing an iron core which a bended part is made bysymmetrically to the center line from the middle part in the width direction of sheet in rolls for preventing meandering and providing plural bearings on the iron core and fitting a rubber sleeve on the outer periphery of the bearings. CONSTITUTION:A device has a pair of rolls which are bent into chevron 3 from the middle of a roll, a travelling strip 1 and a mechanism 6 with which one side of chocks can be turned and then a pair of rolls 2 is opened and closed with a opening and closing mechanism of an air cylinder 4 and electric motor 5, etc., since the rolls 2 have a part, the correcting force of meandering is larger and the alignment of sure directionality is obtained by the turning mechanism 6 at an end of roll, the rolls can contribute to the stable operation of line.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a roll for preventing meandering of a strip and a device thereof.

(Prior Art) Conventionally, as a means for straightening a meandering strip so that it runs straight, there are methods such as (a) roll crown and (b) shown in FIG.
) A roll position correction device using sensors and oil pressure, generally called a steering device, is often used.

In addition, as a special application, the roll may be inclined so that the strip runs from both sides to the center, such as the split support roll of a horizontal louver device for accumulating strips as shown in FIG. 6(C).

Furthermore, Japanese Patent Application Laid-Open No. 158827/1983 discloses a method of correcting the meandering of the strip by blowing gas into the contact area between the strip and the roll.

(Issue 8 to be solved by the invention) All of the conventional techniques have advantages and disadvantages, and the crown has a limit in its corrective power due to the increase in tension at the center of the plate, which can cause scratches on the plate. The steering device requires sensors and a hydraulic system, making it a high-cost device.

In addition, changing the parallelism as with support rolls has a great meandering correction effect, so it is often used to correct roll alignment, etc. However, with split rolls, markings at the roll boundary can be a problem on lines where strip quality is strict. Become.

Furthermore, in the case of this roll, centering force does not always work, and the line must be stopped to correct the alignment.

The present invention provides a strip meandering prevention roll with a large straightening force and reliable directionality, and an apparatus therefor.

(Means for Solving the Problems) The gist of the present invention is to provide an iron core in which bent portions are provided at one or more locations symmetrically with respect to the sheet width direction from the center of the roll. A strip meandering prevention roll comprising a plurality of bearings and a rubber sleeve attached to the outer periphery of the bearings, a strip meandering prevention device comprising an opening/closing mechanism for opening and closing the roll, and one end of the roll rotatable. This is a strip meandering prevention device provided with a rotation mechanism.

That is, the present invention is a device based on the principle of straightening by roll alignment with a large straightening force and reliable directionality, and its main configuration is as shown in FIG. A pair of rolls 2 bent at 3,
It has a mechanism 6 that can rotate one side of the chock, and further the pair of rolls 2 are opened and closed by an opening and closing mechanism such as an air cylinder 4 and an electric motor 5.

A pair of dogleg rolls 2 sandwiching the strip 1 constantly exerts a centering force on the steel plate, and since the rolls are not divided, there is no fear of marking or staining the steel plate.

If a deviation occurs that cannot be corrected by constant centering force, the steel plate can be moved in a direction to correct the deviation using the rotating mechanism 6 while being held in place.

The roll shape of the present invention is not limited to the dogleg shape in which the roll bending portion 3 is located at one central portion as shown in FIG. 2(a);
) and (e), by having a plurality of bent portions 7 in the center or symmetrically, the meandering correction ability can be improved.

Figure 3(a) shows the mechanism for correcting meandering during alignment adjustment using the rotating mechanism at one end of the roll. By moving the rotating mechanism at one end of the roll, the balance of the direction of the force transmitted to the strip can be adjusted in the meandering correction direction. It is to be adjusted to.

In addition, Fig. 3(b) shows the mechanism of constant centering performance that works only by sandwiching a pair of rolls between the strips, but when strip meandering occurs, the range of contact with the main rolls is different for the left and right sides of the strip. For,
The strip corrects the meandering by receiving force from the roll in the direction opposite to the meandering.

(Embodiment) An embodiment of the present invention will be described with reference to FIG. 4, taking a dogleg roll as an example.

It is assumed that the pair of dogleg rolls 8 sandwiching the strip 19, which progresses from top to bottom in FIG. 4, are rotated by a drive motor or non-drive by rotational torque from a steel plate.

The dogleg roll 8 has a plurality of bearings 11 built in between the iron core 10 and the roll surface material, which is numerically rubber 9.
are fixed at both shaft ends 13,14.

The iron core IO has a dogleg-shaped inclination angle of 18, but this angle is 0.
．． It is reasonable to select a value in the range of 3@ to 2@ from the viewpoint of the meandering correction effect, the durability of the rubber 9 which is subjected to tensile and compressive loads with each rotation of the roll, and the occurrence of throttling due to excessive centering effect. You can say it's a place.

In addition, by installing multiple roll bending parts symmetrically on the left and right as necessary, the tension and compression load on the rubber 9 can be reduced.
Its durability can be improved (see FIGS. 2(b) and (c)).

Further, both shaft ends 13.14 of the iron core 10 are attached to chocks 12.17 for opening and closing the rolls, and another chock 17 is installed inside the chock 17 so that the inner side can be shifted in a plane parallel to the strip. Equipped with 15 chocks. The chock 15 can be shifted by a jack 1B mounted on the chock 17.

The roll layout when the strip meandering prevention device of the present invention is installed in a continuous annealing line is shown in FIG. 5(a).
Operate the steering device 21 on the upstream side of the line,
Downstream deflector with and without this device 20 when tested by forcibly moving the pass line of the strip 23
The state of meandering propagation to the roll 22 is shown in Figure 5 (b).
), (e) and (d).

From Figure 5, the alignment with constant centering is about 2
0% improvement, when operating roll alignment, about 4
It shows that it has a meandering prevention effect of 0% and can contribute to stable line operation.

The apparatus of the present invention can be applied not only to continuous annealing lines but also to all thin plate coil threading lines.

(Effects of the Invention) Since the roll of the present invention has a bent portion, it has a large meandering correction force, and the rotating mechanism at one end of the roll allows roll alignment with reliable directionality to be obtained, contributing to stable operation of the line.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the strip meandering prevention device of the present invention, FIG. 2(a) is a plan view of the meandering prevention roll of the present invention,
FIG. 2(b) is a plan view of a meandering prevention roll of another example of the present invention, FIG. 2(e) is a plan view of a meandering prevention roll of still another example of the present invention, and FIG. ) is an explanatory diagram showing a mechanism for correcting meandering by having a rotating mechanism of the device of the present invention;
Figure (b) is an explanatory diagram showing the mechanism of constant centering performance, Figure 4 is a sectional view of the strip meandering prevention device of the present invention, and Figure 5 (a) is a roll when the device of the present invention is installed in a continuous annealing line. Explanatory diagram showing the layout, Fig. 5 (b
) is an explanatory diagram showing the meandering propagation state without the device of the present invention, Figures 5(c) and (a), @ are explanatory diagrams showing the constant centering effect when the device of the present invention is installed, and Figure 5( d)
, (1'), (o) are explanatory diagrams showing the effect of adjusting the rotation mechanism when the device of the present invention is installed, and Fig. 6 (a)
), (b) and (C) are explanatory diagrams showing conventional meandering prevention devices, (a) is a crown roll diagram,
(b) is a diagram of a steering device, and (C) is a diagram of a split type support roll. Figure 1

Claims (1)

[Claims] 1. An iron core having one or more bent portions symmetrically in the sheet width direction from the center of the roll, a plurality of bearings provided on the iron core, and an outer periphery of the bearing. A meandering prevention roll made of a strip with a rubber sleeve attached to it. 2. An iron core is provided with one or more bent portions symmetrically in the sheet width direction from the center of the roll, a plurality of bearings are provided on the iron core, and a rubber sleeve is attached to the outer periphery of the bearing. A strip meandering prevention device comprising a strip meandering prevention roll and an opening/closing mechanism for opening and closing the roll. 3. The strip meandering prevention device according to claim 2, which is provided with a rotation mechanism that is rotatable around one end of the roll.