JPH04333313A - Device of variation of on-line roll crown - Google Patents

Abstract

PURPOSE:To prevent rolls from being injured and surface wrinkles from being generated on rolled materials by dividing backup rolls in the direction of a roll shaft, providing spherical bearings on both ends of each roll shaft and sheathing an eccentric ring. CONSTITUTION:When the eccentric ring 5 is rotated, an eccentric amount e is reduced, a backup roll shaft core 1 moves up. The backup roll 4 on the left side inclines right upward and the right side backup roll 4 inclines left upward. At that time, the inner ring of the spherical bearing 51 rotates along the spherical surface. The outer ring of the spherical bearing 51 changes as small as the backup roll inclines, the outer ring can slide structurally in an eccentric ring 5 in the horizontal direction by the change of the distance between the bearings.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to roll crown control of a rolling mill or a leveler, and the present invention relates to an online roll crown that allows the amount of roll crown to be arbitrarily changed online when the shape of a plate material is strictly required. Regarding variable devices.

0002

[Prior art] In cold rolling of thin sheets, in order to obtain a good sheet shape, it is necessary to roll with a roll having a roll crown that corresponds to the shape of the original sheet. To get a roll crown of
It is necessary to quickly set the roll crown amount online. Further, in cold leveling of a thin plate, in order to obtain a good plate shape, it is necessary to distribute intermesh setting values in the width direction of the plate according to the distribution of yield points in the width direction of the plate.

As a conventional method for setting roll crown in a rolling mill, there is a roll crown adjusting device for a rolling mill described in Japanese Patent Application Laid-Open No. 1-181910. This is shown in Figure 6.
and shown in FIG.

This roll crown adjustment device includes a work roll 60, an intermediate roll 61 that supports the work roll 60, and a divided backup roll 6 that supports the intermediate roll 61 and is divided into a plurality of parts along the axial direction.
A crown adjustment mechanism in which a roll group consisting of 2 is arranged above or below the passing surface of the material to be rolled 1 or either above or below, and the divided backup rolls 62 are eccentrically centered on all or part of the divided backup rolls 62. The rolling mill is equipped with a drive device for the crown adjustment mechanism on the support frame of the split backup roll 62, and a means for detecting the amount of eccentricity of the split backup roll 62 on the drive device side.

[0005]

However, as shown in FIGS. 6 and 7, the roll crown adjustment device of the rolling mill is capable of changing the position of the axis of the roll shaft 63 of the divided backup roll 62, The inclination of the divided backup roll 62 cannot be changed. Therefore, as shown in FIG. 5(b), each divided backup roll 62
When applied to a rolling mill where steps δ1, δ2, and δ3 occur between the end faces, there is a problem in that the material to be rolled gets scratched due to scratches in the intermediate rolls and work rolls. When applied to the back-up roll, the intermediate roll did not touch the surface of the backup roll, making it impossible to apply due to the strength.

SUMMARY OF THE INVENTION An object of the present invention is to provide a roll crown variable device that does not create a level difference between the end faces of each divided backup roll when the axial center position of the divided backup roll is changed.

[0007]

[Means for Solving the Problems] In order to achieve the object, the online roll crown variable device of the present invention has the following features: - In the online roll crown variable device of a rolling mill or leveler having a crawl roll and a backup roll, the backup roll is moved in the roll axis direction. At both ends of the roll axis of each backup roll,
A rotatable spherical bearing is provided so that the backup roll can be tilted, an eccentric ring having an outer circle eccentric to the roll axis is fitted onto the spherical bearing, and the eccentric ring is rotated by a fixed bearing. It is characterized by being freely installed.

[0008]

[Operation] With the above structure, the divided backup roll can be tilted in a shape that almost follows the desired crown shape, and unlike the conventional parallel movement method,
There is no difference in level between the divided backup rolls.

[0009] Therefore, there is no contact between the backup roll and the intermediate roll or work roll, and a uniform and small contact surface can be obtained.

Furthermore, since the eccentric ring is fitted onto the spherical bearing for the backup roll, the variable crown device can be made compact.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a roll configuration diagram of a six-stage straightening roll of a tension leveler showing an embodiment of the present invention. Also,
FIG. 2 is a conceptual diagram showing a cross section taken along line A-A in FIG. 1, and shows a state in which three backup rolls, two intermediate rolls, and one work roll are stacked, respectively.

In the figure, 1 is a plate material to be straightened, 2 is a work roll, 3 is an intermediate roll, 4 is a backup roll for roll setting, and 49 is a fixed backup roll. Reference numeral 5 denotes an eccentric ring having an outer circle with a rotation center C2 eccentric to the axis C1 of the backup roll 4. Although not shown in FIG. 2, the eccentric ring 5 is rotatably supported within a fixed bearing of the upper rigid frame. Further, the amount of eccentricity between the rotation centers C1 and C2 is e.

8-1, 8-2 are swing link levers for rotating the eccentric ring 5, 52 are swing link levers 8-1,
A roller cam provided at the tip of the ring 8-2 engages with a groove provided in the eccentric ring 5.

54 is a link mechanism for swinging the swing link levers 8-1 and 8-2, and 9 is a drive cylinder for driving the link mechanism.

Reference numeral 53 denotes an intermediate swing link lever, which serves to swing the swing link levers 8-1 and 8-2, which rotate the eccentric ring 5, in opposite directions.

C3. C4. C5 is each swing link lever 8
-1, 8-2, 53 are the swing centers. The distances from the swinging center of each swinging link lever to the roller cam center or from the swinging center to the connection center are made equal, resulting in a lever ratio of 1:1.

Further, the length of the swing link lever 8-1 is twice that of the other two swing link levers 8-2 and 53. As a result, the swing link levers 8-1 and 8-2
The distance traveled by the tip of can be made equal.

Reference numeral 55 is a connecting link that connects the swing link levers 8-1 and 53, and 56 is a link that connects the swing link lever 8-2 and the cylinder 9.

As shown in FIG. 2, this eccentric ring and link mechanism 9
The operation will be explained below.

When pushed in the direction of the arrow by the drive cylinder 9, the connecting link 56 moves to the left, and the link lever 8-2
is swung counterclockwise, and the intermediate link lever 53 is swung clockwise. The connecting link 55 moves rightward, and the link lever 8-1 swings clockwise. The roller cam 52 of the link lever 8-1 rotates the left eccentric ring 5 counterclockwise, and the left backup roll 4 rotates around the eccentric ring rotation center C2 as shown by the arrow. C1 rotates, moves to the lower right, presses the intermediate roll 3, and presses the intermediate roll 3.
presses work roll 2.

Similarly, the roller cam 52 of the link lever 8-2 rotates the right eccentric ring 5 clockwise, and the right backup roll 4 accordingly rotates around the eccentric ring rotation center C2 as shown by the arrow. The backup roll axis C1 rotates and moves to the lower right to press the intermediate roll 3, and the intermediate roll 3 presses the work roll 2.

FIG. 3 is a partially enlarged view of FIG. 2, and FIG. 4 is a cross-sectional view taken along line BB in FIG.

The spherical bearing 51 supporting the roll shaft 6 of the backup roll 4 and the eccentric ring 5 fitted on the outside thereof will be explained below with reference to FIGS. 3 and 4.

In the figure, 4 is a backup roll, and 6 is a backup roll.
51 is a spherical bearing supporting the backup roll shaft 6, and 5 is an eccentric ring made of a spherical bearing.

The eccentric ring 5 is eccentric by the backup roll axes C1 and e, and has a circular outer shape centered on the rotation center C2. A fixed bearing 7 has a circular hole that fits into the outer shape of the eccentric ring 5, and allows the eccentric ring 5 to rotate within the hole. A roller cam 52 engages with a groove provided in the eccentric ring 5 to rotate the eccentric ring 5. The roller cam 52 is rotatably attached to the tip of the swing link lever 8-1. The swing link lever 8-1 swings around a swing center C3. 50 is an upper fixed frame that supports the fixed bearing 7.

Next, the spherical bearing 51 will be explained in detail. The spherical bearing 51 fits into the backup roll shaft 6 and includes an inner ring having an outer shape of a spherical surface with a radius R centered on the backup roll axis C1, and an eccentric ring 5 having the inner shape of the spherical surface.
It consists of an outer ring that fits over the inner diameter of the

In such a configuration, first, when the eccentric ring 5 rotates, the eccentricity e shown in FIG. 4 decreases on this cross section, and the backup roll axis C1 moves upward. At this time, if the axis of the other party (not shown) remains unchanged, the left backup roll 4 will tilt upward to the right, and the right backup roll 4 will tilt upward to the left. At this time, the inner ring of the spherical bearing 51 rotates along the spherical surface. Note that the distance between the spherical bearings of the outer ring of the spherical bearing 51 changes slightly due to the tilt of the backup roll 4, so the outer ring slides horizontally within the eccentric ring 5 by the amount of change in the distance between the bearings. I'm trying to make it possible.

In this embodiment, the spherical bearing 51 is of a spherical bush type as shown in FIG.
ISB0005 self-aligning roller bearings or self-aligning ball bearings may also be used.

FIG. 5(a) is a conceptual diagram when crown control of the backup roll is performed with the configuration of the present invention.
As is clear from a comparison with the case where the conventional backup rolls are moved in parallel as shown in FIG. 5(b), there is almost no difference in level between the backup rolls. For example, when trying to obtain a crown amount of 2 mm, in the case of the conventional method, (b) in the same figure
The steps δ1, δ2, and δ3 between the rolls shown in the figure are each about 0.
In contrast, in the present invention, only a small step of about 0.04 mm occurs.

[0030]

[Effects of the Invention] As explained above, the present invention has the following remarkable effects.

(2) The divided backup rolls can be tilted in a shape that almost follows the desired crown shape, and there is no difference in level between the divided backup rolls unlike in the conventional parallel movement method. Therefore, the backup roll, intermediate roll, and work roll will not be scratched.

(2) There is no longer a problem that defects on the work roll are transferred to the surface of the material to be rolled, thereby deteriorating the surface quality of the material to be rolled.

■Since the backup roll can reliably touch the intermediate roll, it can also be applied to a tension leveler where there is no contact between the work rolls.

(2) Since the eccentric ring is fitted onto the spherical bearing for the backup roll, the variable crown device can be made compact.

[Brief explanation of drawings]

FIG. 1 shows a tension leveler 6 showing an embodiment of the present invention.
FIG. 3 is a configuration diagram of a corrugated straightening roll.

FIG. 2 is a conceptual diagram showing a cross section taken along the line A-A in FIG. 1, showing a state in which three backup rolls, two intermediate rolls, and one work roll are stacked, respectively.

FIG. 3 is a partially enlarged view of FIG. 2;

FIG. 4 is a diagram showing a cross section taken along the line BB in FIG. 3;

FIG. 5 shows conceptual diagrams when crown control is performed using split backup rolls, (a) is a diagram for the case of the present invention, (a) is a diagram for the case of the present invention;
(b) is a diagram for the conventional technique, and (c) is a diagram for the case without crown control.

FIG. 6 is a front sectional view of a conventional crown adjustment device of a rolling mill.

7 is a diagram showing a cross section taken along the line CC in FIG. 6. FIG.

[Explanation of symbols]

1 Plate material to be straightened (rolled material) 2 Work roll 3 Intermediate roll 4 Backup roll 5 Eccentric ring 6 Backup roll shaft 7 Fixed bearing 8-1 Swing link lever 8-2 Swing link lever 9 Drive cylinder 47 Backup roll shaft 48 Axial core bush 49 Fixed backup roll 50 Fixed frame 51 Spherical bearing 52 Roller cam 53 Intermediate swing link lever 54 Link mechanism 55 Connecting link 56 Connecting link C1 Spherical bearing rotation center (backup roll axis)
C2 Eccentric ring rotation center C3 Swing link lever swing center C4 Swing link lever swing center C5 Swing link lever swing center

Claims (1)

[Claims] Claim 1: In an online roll crown variable device for a rolling mill or leveler having a work roll and a backup roll, the backup roll is divided in the roll axis direction, and a backup roll is installed at both ends of the roll axis of each of the divided backup rolls. A rotatable spherical bearing is provided so as to be tiltable, and an eccentric ring having an outer circle eccentric with respect to the roll axis is fitted onto the spherical bearing.
An online roll crown variable device characterized in that the eccentric ring is rotatably provided on a fixed bearing.