JPH0780548A - Tension leveler - Google Patents

Abstract

PURPOSE:To recombine many rolls arranged in upper and lower roll units to other constitution of rolls corresponding to the thickness of changed steel strip in a short time with little decrease in productive efficiency of the steel strip. CONSTITUTION:A tension leveler is arranged with an upper traverse on which the upper roll unit is mounted and a lower traverse on which the lower roll unit is mounted in movable states in the direction orthogonally crossing with the passing direction of steel strip 1 in a housing 4. Plural sets of upper and lower traverses 20a, 20b, 21a and 21b mounted with roll units consisting of different constitution of rolls corresponding to the steel strip to be passed are linked with each other having a specific distance between them in the direction orthogonally crossing with the passing direction in the housing. A selected set of traverses among plural sets of upper and lower traverses is positioned at the specific position in the housing by a positioning means 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension leveler suitable for a process line for continuously producing strips having a widely varied thickness.

[0002]

2. Description of the Related Art As shown in FIG. 7, a tension leveler is used for a strip 1 such as a cold-rolled steel sheet which is rolled by a cold rolling mill. Shape defects such as partial elongation such as elongation 3
It is a device that extends and corrects the strip 1 by applying a bending force from above and below.

As a conventional tension leveler, for example, as described in Japanese Examined Patent Publication No. 4-9604, an optimum bending for continuously applying forward bending and reverse bending to strips respectively passed through a housing. The upper roll unit and the lower roll unit having a roll configuration that gives force are arranged so that the intermesh of each is adjustable, and the band plate is passed between these upper roll unit and lower roll unit to form the shape of the band plate. I am trying to correct it.

By the way, when the thickness of the strip passed through the tension leveler is changed, the rolls arranged in the upper roll unit and the lower roll unit are always provided with the optimum bending force. Must be recombined into another roll to be added. That is, the distortion of the outer surface of the strip caused by the bending force applied by the upper roll unit and the lower roll unit is set to be smaller as the thickness of the strip becomes thinner, and set to be larger as the thickness of the strip 1 becomes thicker. Therefore, for example, a thin strip (having a thickness of 0.08 mm or less) and a thick strip (having a thickness of 0.
If the same amount of strain is applied to (15 mm or more), a large-diameter roll capable of small repetitive bending is applied to a thick strip, and a large repetitive bending is applied to a thin strip. It is necessary to select small diameter rolls and combine them.

As described above, when the upper roll unit and the lower roll unit are recombined, it has been conventionally performed as shown in FIG.
As shown in FIG. 1, first, an upper traverse 5 having a predetermined roll structure and detachably held on the upper part of the housing 4, and an upper traverse 5 having a predetermined roll structure and detachably held on the lower part of the housing 4. The lower traverse 6 and the lower traverse 6 are detached from the housing 4 by removing the keeper plate, the spacer 26 is sandwiched between the upper and lower traverses 5 and 6 to release the upper cylinder 7 and the lower cylinder from the housing 4, and the upper and lower traverse 5 , 6 are mounted on rails 11a and 11b extending in the orthogonal direction of the entrance and exit bride rolls. Then, the rod 13a of the traverse cylinder 13 arranged below the device and connected to the lower traverse 6 via the connecting frame 12 is moved forward to move the wheels 5a and 6a while rolling the wheels 5a and 6a. Are moved from inside the housing 4 to the outside. further,
The wires 14 are engaged with the upper and lower traverses 5 and 6 respectively and transferred to another place, and new upper and lower traverses 5 and 6 (a roll unit capable of performing normal shape correction on a strip having a changed plate thickness is incorporated. Traverse)) rail 11
It is generally configured to be mounted on a and 11b, and to incorporate a new vertical traverse in the housing 4 by the operation reverse to the above-mentioned operation.

[0006]

However, in the above-mentioned conventional tension leveler, when the thickness of the strip is changed, the housing 4 is moved to the upper and lower roll units (the upper traverse 5 and the lower traverse 6). Since the rolls are recombined after pulling out the rolls, it is necessary to stop the continuous production of the strips, and there is a problem that a lot of time and labor are spent on recombining the new rolls. .

The present invention has been made by paying attention to the unsolved problem of the above-mentioned conventional example, and a large number of rolls arranged in the upper and lower roll units are changed to have different strip plate thicknesses. It is an object of the present invention to provide a tension leveler that can be recombined into a roll having a corresponding other roll structure in a short time and that does not significantly reduce the strip plate production efficiency.

[0008]

A tension leveler according to the present invention comprises an upper traverse having an upper roll unit and a lower traverse having a lower roll unit, which are movable in a housing in a direction orthogonal to the direction of passage of a strip. In the tension leveler that corrects the shape of the strip by arranging the strips and passing the strip between the upper roll unit and the lower roll unit, rolls having different roll configurations corresponding to the strip to be threaded. A plurality of sets of upper traverses and lower traverses equipped with units are connected to each other at a predetermined interval in a direction orthogonal to the plate passing direction of the housing, and a selected one of the plurality of upper traverses and lower traverses is connected. A device comprising a positioning means for positioning the housing at a predetermined position.

[0009]

According to the present invention configured as described above, even when the thickness of the strip is changed, the roll unit having the roll configuration for the thickness before the change is mounted. After uncoupling the upper traverse and lower traverse sets from the housing, the roll unit with the changed roll thickness is installed from the multiple upper traverse and lower traverse sets that are connected. Since one set of the upper and lower traverses can be positioned and incorporated in the housing by the positioning means, the time required for recombining a large number of rolls corresponding to the change in the plate thickness of the strip plate can be significantly reduced.

Further, the production efficiency of the strips which are continuously produced while changing the sheet thickness does not decrease so much.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. The same components as those shown in FIGS. 7 and 8 are designated by the same reference numerals, and the description thereof will be omitted. In the tension leveler of this embodiment, as shown in FIG. 2, two sets of upper and lower traverses 20a, 20b and 21a, 21b each equipped with a roll unit are provided by extending an entrance side bridle roll 9 and an exit side bridle roll 10. They are connected to each other at a predetermined interval in the direction orthogonal to the direction.

The upper roll units mounted on the upper traverses 20a and 21a are, as shown in FIG. 1, arranged so as to sandwich the non-drive type work roll units 22a and 22b facing each other from the upper side of the strip plate 1. Non-drive type deflector roll units 22c, 22 installed
It is composed of d and 22e. Lower traverse 20
The lower roll units mounted on b and 21b are work roll units 23a that face the deflector roll units 22c, 22d, and 22e with the strip 1 interposed therebetween.
23b and 23c, and deflector roll units 23d and 23e arranged between them.

The upper traverse units 20a, 2
The cylinder 1 is detachably held on the upper part of the housing 4 by the cylinder 7. On the other hand, the lower traverse 20b,
Each roll of the lower roll unit mounted on 21b is
They are fixed to independent support frames 24a to 24e, respectively, and are supported so as to be able to move up and down by intermesh adjusting devices 25a to 25e having motor-driven jacks attached to the bottoms of the lower traverses 20b and 21b.
The lower traverses 20b and 21b are supported in a lower cylinder 8 of the housing 4 so as to be able to move up and down in the housing 4, and further via a positioning spacer 16 projecting from the facing surface of the upper traverse 8 and the lower traverse 9. It is detachably held by the upper traverses 20a and 21a.

Then, two sets of upper and lower traverses 20a, 2
The work roll unit of the upper and lower traverses 20a, 20b of one set of 0b and 21a, 21b is provided with a roll diameter selected so that the shape of the thin strip 1 can be corrected to a small diameter. In order to prevent the work rolls from popping out, the work rolls are attached to the upper and lower traverses at a predetermined angle. The work roll unit of the other pair of upper and lower traverses 21a and 21b is provided with a large roll diameter that can correct the shape of the thick strip 1.

That is, as a concrete roll constitution,
When the work rolls 27 and 28 have a small diameter, the backup rolls 29 and 30 and the intermediate rolls 31 and 32 are attached to the upper and lower traverses (FIGS. 4 and 5).
reference). Further, when the diameter of the work roll 33 is large to some extent, only the backup roll 34 is used (see FIG. 6).

Two pairs of upper and lower traverses 20a, 20a
b and 21a, 21b are fixed to each other at their side portions by a connecting member 35, and when the connected state with the housing 4 is released, that is, when the keeper plate 17 connected with the housing 4 is removed. Are configured to move integrally. And each upper traverse 2
Wheels 20c and 21c are provided on the wheels 0a and 21a, and these wheels 20c and 21c are on the upper rail 11a.
It is designed to be rollably mounted on top. In addition, the wheels 20d, 21d are also attached to the lower traverses 20b, 21b.
The wheels 20d and 21d are rotatably mounted on the lower rail 11b.

A connecting frame 36 is fixed vertically downward to the connecting member 35, and a lower end portion of the connecting frame 36 is a traverse cylinder 37 (positioning means) connected to a fixed system in an intermediate trunnion form. Is hinged to the tip of the rod 37a. Further, reference numeral 38 in the drawing is an intermesh setting motor for setting the amount of elevation of the intermesh devices 25a to 25e, and reference numeral 39 in the drawing is a position detector for detecting the current position of the intermesh devices 25a to 25e. By sending a position signal from the position detector 39 to a control device (not shown), drive control of the intermesh devices 25a to 25e is automatically performed.

Next, the usage mode of the tension leveler of this embodiment when the strip thickness is changed from the thin one to the thick one in the continuous production of the strip 1 will be described with reference to FIGS. 2 and 3. . First, as shown in FIG. 2, the upper and lower traverses 20a and 20b that have been used to correct the shape of the thin strip 1 are released from the housing 4 by removing the keeper plate 17, and the spacer 26 is provided between the upper and lower traverses 20a and 20b. The upper and lower traverses 20a, 2 at the same time when sandwiched
The 0b wheels 20c and 20d are placed on the rails 11a and 11b. At that time, another pair of upper and lower traverses 21a,
The wheels 21c and 21d of 21b are automatically rails 11a,
It is placed on 11b.

Next, the rod 3 of the traverse cylinder 37
7a is retracted so that wheels 20c, 20d, 21c, 2
The two sets of upper and lower traverses 20a, 20b, 21a, 21b are moved to the right side of the drawing while rolling 1d on the rails 11a, 11b. When the other set of upper and lower traverses 21a and 21b is arranged in the housing 4, the retracting operation of the rod 37a of the traverse cylinder 37 is stopped (see FIG. 3).

While mounting the keeper plate 17 connecting the upper and lower traverses 21a and 21b and the housing 4, the spacer 26 between them is removed. As a result, another set of upper and lower traverses 21a and 21b in which each roll is selected to have a roll diameter capable of correcting the shape of the thick strip 1 is incorporated in the housing 4. Therefore, when the strip plate 1 is changed from a thin one to a thick one, the tension leveler of this embodiment has one set of upper and lower traverses 20a, 20b in which the rolls for the thin strip 1 are arranged. The traverse cylinder 37 after releasing the
Drive the two sets of upper and lower traverses 20a, 20b,
21a and 21b are moved at the same time, and the other set of upper and lower traverses 21a in which the rolls for the thick strip 1 are arranged,
Since 21b can be arranged and incorporated in the housing 4, a large number of rolls corresponding to the changed plate thickness of the strip plate 1 can be recombined in a short time, and the production efficiency of the strip plate is significantly reduced. There is nothing to do.

In the present embodiment, the tension leveler provided with the two sets of upper and lower traverses 20a, 20b, 21a, 21b has been described, but the present invention is not limited to this, and the strip 1 has three types. At least three pairs of upper and lower traverses may be connected to each other as long as they are manufactured continuously by changing the plate thickness.

[0022]

As described above, according to the present invention, the roll structure corresponding to the plate thickness before and after the change can be applied so that the optimum bending force can be applied to the changed plate thickness of the strip. A plurality of sets of upper and lower traverses are connected at a predetermined interval in a direction orthogonal to the plate passing direction of the housing, and one set selected from among the plurality of sets of upper and lower traverses is positioned by the positioning means. Since the structure is positioned at a predetermined position in the housing, many rolls corresponding to the changed strip thickness can be recombined in a short time, and as a result, continuous production can be performed while changing the strip thickness. It does not significantly reduce the production efficiency of the strip. .

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an internal structure of a tension leveler of the present invention.

FIG. 2 is a schematic configuration diagram showing an example in which two sets of upper and lower traverses are provided.

FIG. 3 is a schematic configuration diagram showing a state in which one set of upper and lower traverses in FIG. 2 is assembled and moved while another set of upper and lower traverses is assembled.

FIG. 4 is a view showing the constituent members of the first embodiment of the work roll unit used in the present invention.

FIG. 5 is a view showing constituent members of a second embodiment of the work roll unit used in the present invention.

FIG. 6 is a view showing constituent members of a third embodiment of the work roll unit used in the present invention.

FIG. 7 is an explanatory diagram showing a defective shape of the strip plate.

FIG. 8 is a schematic configuration diagram illustrating a rear traverse recombination operation in a conventional tension leveler.

[Explanation of symbols]

 1 strip 4 housing 20a, 21a upper traverse 20b, 21b lower traverse 22a, 22b work roll unit 22c, 22d, 22e deflector roll unit 23a, 23b, 23c work roll unit 22d, 22e deflector roll unit 35 connecting member 36 connecting frame 37 Traverse cylinder 37a rod

Claims (1)

[Claims] 1. An upper traverse equipped with an upper roll unit and a lower traverse equipped with a lower roll unit, which are movable in a direction orthogonal to a strip passing direction, are provided in a housing, and the upper roll unit and the lower roll are installed. In a tension leveler that corrects the shape of the strips by passing the strips between the roll units, a plurality of sets of upper traverses and lowers equipped with roll units having different roll configurations corresponding to the strips to be passed. Positioning means for connecting the traverses at a predetermined interval in a direction orthogonal to the plate passing direction of the housing and for positioning a selected one of the plurality of upper traverses and the lower traverse at a predetermined position in the housing. A tension leveler characterized by having.