JPS6138714A - Tension leveler - Google Patents

Abstract

PURPOSE:To prevent the generation of chatter-mark defects by forming a tension leveler only by tension leveling units, having each a work roll at the under side of a strip and pushing the strip upward. CONSTITUTION:Plural sets of tension leveling units 10, 11 are arranged, each unit is constituted of a work roll 2 for pressing a strip 1 from its under side, intermediate rolls 3a, b for holding a reaction acting on the roll 2, backup rolls 4a, b, c for holding the reactions acting on the rolls 3a, b and a pair of deflector rolls 5a, b for holding the strip 1 pressed by the work roll 2. The strip 1 is passed through them so as to press both sides of the strip 1 against the leveling 10, 11 respetively.

Description

[Detailed Description of the Invention] The invention relates to a tension repeller for straightening the shape of a material to be straightened, such as a metal IJ knob.

1-7: Cold rolled steel plate, stainless steel plate rolled by a rolling mill,
In strips such as aluminum plates, a tension repeller is used to correct formation defects such as warping, partial elongation, and distortion that occur during rolling. Is this tension repeller passed between strips of kerol with full tension applied and bent 5 times? Conventionally, tension repellers such as the one shown below have been commonly used. That is, a work roll that faces up and down the material to be straightened from one side of the material to be straightened, an intermediate roll that receives a reaction force applied to the work roll, a backup roll that receives a reaction force r applied to the intermediate roll, and the material to be straightened. A plurality of tension leveler units each consisting of a pair of deflector rolls and η) provided on the other side of the The tension leveler units are arranged alternately upward and downward so that pressure by the work rolls is applied alternately from the upper and lower surfaces of the material to be straightened.

FIG. 1 is a side view showing the arrangement of one example of the conventional tension repeller as mentioned above, in which the strip 1, which is the material to be straightened, is tensioned by a priddle roll (not shown), and is moved in the direction of the arrow shown in the figure. Move to multiple tension repeller units) 10°11? It passes through and the shape is completely corrected. In the tension leveler unit 10, the work roll 2 presses the strip from the lower surface and bends the strip with a large processing curvature between it and the deflector rolls 5a and 5b. The work roll 2 produces pressing sound from the upper surface of the strip 1 in the primary tension leveler unit 11 and from the lower surface in the next tension leveler unit 10 (multiple tension leveler units)10. II is thus arranged alternately upward and downward.

The defective shape of the strip 1 is corrected by the repeated bending process using the plurality of work rolls 2, but the diameter of the work rolls 2 gradually increases in the direction of movement of the IJ tube 1. The residual stress in the strip 1 after straightening is reduced by gradually reducing the processing curvature.

The work roll 2 is supported by two intermediate rolls 3a, 3b, and the intermediate rolls 3a, 3b are supported by three backup rolls 4a, 4b, 4c. All of these are for reinforcing the small diameter work roll 2. The deflector rolls 5a and 5b receive the strip 1 on the opposite side from the work roll 2, and prevent the adjustment of each work roll 2 from affecting other rolls. and easy to operate.

Note that the work roll 2 and intermediate rolls 3a and 3b.

Backup roll 4a, 4b, 4cl'! , supported by a roll bearing 6 and a roll bearing support fitting 7.

Deflector rolls 5a and 5b have deflector roll bearings 8
It is supported by

By straightening the strip using the tension repeller as described above, a strip product with an excellent shape can be obtained. However, when one strip is lowered with this tension repeller, a very faint clouding in the form of tatami lines called chatta marks may sometimes occur on the strip surface, and these chatta marks reduce the commercial value of the strip. often decreases.

Is the invention such a chatter mark defect? The purpose is to provide a tension repeller tm that does not occur.

In order to achieve all of these objects, the present invention provides a work roll that presses the material to be straightened from the lower side of the material to be straightened, an intermediate roll that receives a reaction force applied to the work roll, and a reaction force applied to the intermediate roll. A backup roll that receives the above material, and a material to be straightened that is provided above the material to be straightened and is pressed by the work roll? A plurality of tension leveler units constituted by a pair of deflector rolls are arranged, and the material to be straightened is arranged such that the front and back surfaces of the material to be straightened are alternately pressed upward by the plurality of tension leveler units. The tension leveler unit is arranged so that the tension leveler unit can pass through the tension leveler unit.

The following is a configuration of the present invention based on the 7C embodiment shown in the drawings.
This will be explained in more detail. FIG. 2(a) is a side view showing the arrangement of one embodiment of the tension leveler of the present invention, and FIG. 2(a) is a side view showing the arrangement of another embodiment. Are the same symbols in these drawings as in Figure 1 above? Herein, the π parts are the same or corresponding parts.

In FIG. 2(a), the tension leveler unit 10, helper rolls 12a and 12b, and tension leveler unit 1 are arranged along the passage path of the straightening material strip 1.
0 is arranged. The strip 1 is tensioned by a tensioning means such as a priddle roll (not shown),
1st tension leveler unit) 10k, passing L7
After c, the direction is reversed by the helper rolls 12a and 12b, and further passes through the second tension leveler unit 10.

The tension leveler unit 10 has the same structure as shown in FIG. 1 above, and the work roll 2 applies a pressing sound to the strip 1 from the lower side of the strip 1 upward. Since the IJ tube 1 is reversed by the helper rolls 12a and 12b, the back surface 1b of the strip 1 is pressed upward by the work roll 2 in the first tension leveler unit 10, and the second tension leveler unit 10 Strip 1 in leveler unit 10
The surface 1a of is pressed upward by the work roll 2. In this illustrated example, two tension leveler units 10 press the strip 1 once each on the front and back sides. However, the number of tension leveler units is not limited to two, and may be any number of units. It can also be placed.

Figure 2 (b) shows the strip 1 of one Herno 1,000 roll 1.
This is an example of a structure in which the direction is changed by 2.

By using the tension leveler configured as described above to correct the shape of the IJ knob, a straightened strip without chatter marks can be obtained. The reason for this is explained below.

Chattamer dandruff occurs on the surface of the strip 10 of the material to be straightened because the strip 1 is subjected to plastic processing due to bending by the work roll 2? Along with this, when the line speed exceeds a certain level, the vibration of the strip 1 increases, and it is thought that this vibration causes wrinkle-like marks on the surface of the strip 1.

As shown in FIG. 1, in the conventional tension repeller, a work roll 2 is attached to the surface 1a of the strip 1 from the upper side.
Due to pressure? It also has 11 additional tension leveler units. In this tension leveler unit 11,
As shown in the side view of FIG. 3 (a), the work roll 2,
Intermediate rolls 3a, 3b, backup rolls 4a, 4b
.

4C above the strip 1, these rolls are rotatably supported at both ends by roll bearings 6, respectively. The backup rolls 4a, 4b, and 4c may be divided into a plurality of parts in the longitudinal direction, and a bearing 1-W may be provided between them. However, there is always a gap between the bearing 6 and each roll shaft, and for this reason, the axial center position of each roll is not determined within the bearing gap and is in an unstable state. Also, Figure 3 O
As shown by the chain line in the front view of )), the center of each roll in the longitudinal direction is bent due to its own weight. Therefore, when the strip 1 is pressed downward by the work roll 2, each roll, which is unstable and deformed as described above, vibrates while rotating under the upward reaction force, and these vibrations is transmitted to the strip 1, causing the strip 1 to vibrate greatly, causing the chatter mark to occur.

On the other hand, the tension leveler according to the present invention is composed only of a tension leveler unit 10 which is located below the work roll 2 strip 1 and presses the strip upward. Therefore, as shown in FIG. 4, the work roll 2. Intermediate rolls 3a, 3b, backup roll 4a
.

4b and 4c are stable and have almost no deformation.

In other words, even if there is a gap between each roll shaft and the roll bearing 6, the roll axis always settles downward due to its own weight, and the work roll 2, which has the lowest rigidity, will be at both ends even when deformed by the roll's own weight. Supported not only by the roll bearing 6 but also by the more rigid intermediate rolls 3a, 3b, and further supported by the backup rolls 4a, 4b, 4c, there is almost no deformation.For this reason, the rotation of each roll is stable and almost no vibration occurs.Therefore, strip 1 also hardly vibrates.

Chatter dandruff does not occur on the surface of the strip 1.

For the above reasons, if the tension repeller according to the present invention is used, vibration of the material to be straightened can be prevented and a beautiful material to be straightened without chatter marks can be obtained. Another tension leveler unit according to the present invention? Because it is placed vertically rather than horizontally,
It also has the advantage of being able to be installed in a narrow space without requiring the large size of conventional tension repellers. Furthermore, since only the same type of tension leveler is used, manufacturing and assembly are easy.

[Brief explanation of drawings]

Figure 1 is a side view of the arrangement of an example of a conventional tension repeller.
FIGS. 2(a) and 2(b) are side views of the arrangement of an embodiment of the tension leveler of the present invention, and FIG. 3(a) shows the upper part of the tension leveler unit that presses above the material to be straightened. Fig. 3(b) is a side view of the arrangement, and Fig. 4(b) is a front view of the arrangement.
4(a) is a side view of the arrangement showing the lower half of the tension leveler unit that presses the material to be straightened from below, and FIG. 4(b) is a front view of the arrangement. In the drawing, 1 is the strip and 2 is the work roll. 3a and 3b are intermediate rolls. 4a, 4b, and 4c are backup rolls. 5a and 5b are deflector rolls, 6 is a roll bearing, and 7 is a roll bearing support fitting. 8 is a deflector roll bearing;

Claims (1)

[Claims] A work roll that presses the material to be straightened from the lower side of the material to be straightened, an intermediate roll that receives a reaction force applied to the work roll, a backup roll that receives a reaction force applied to the intermediate roll, and an upper part of the material to be straightened. A plurality of tension leveler units each including a pair of deflector rolls provided on the side to receive the material to be straightened and pressed by the work rolls are arranged, and the front and back surfaces of the material to be straightened are alternately aligned with the plurality of tension leveler units. A tension leveler, characterized in that the tension leveler unit is arranged so that the material to be straightened passes through the tension leveler unit while being pressed upward by the tension leveler unit.