JPS6019764Y2 - Tension distribution adjustment device in rolling mill - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a method for improving the tension distribution in a rolling mill in order to correct the shape defects of a rolled material that occur during the rolling process and obtain a rolled material as flat as possible. This invention relates to an adjustment device.

More specifically, a roll divided along the width direction of the rolled material is rotatably supported on the conveyance path on the exit side of the rolling roll, and each roll is moved up and down freely and in the width direction of the rolled material. The rolls are supported freely, and furthermore, each roll is tiltably supported, and a bending moment is applied to the rolled material while tilting the rolls to impart a widthwise distribution to the longitudinal tension of the rolled material. The present invention relates to a tension distribution adjusting device in a rolling mill that is capable of correcting shape defects that occur in rolled materials having a thickness and width of .

[Conventional technology]

Generally, the rolled material after passing through the rolling rolls is not necessarily rolled uniformly, and often exhibits an elongated state as shown in FIG. 1 or an elongated state as shown in FIG. 2 (elongated end state).

Therefore, conventional rolling mills have been equipped with various shape control devices to correct the average degree of rolling, that is, the shape defects.

Conventionally, a roll bending device has been adopted as the most common shape control device.

This roll bending device applies a bending moment to both ends of a work roll or a backing roll during rolling to control the shape over the length of the roll body to obtain a rolled material having the required flatness.

[Problem that the invention attempts to solve]

However, with this roll bending equipment, as the diameter of the roll increases, it is not easy to bend it, and since the diameter of the backing roll is particularly large, a considerably large equipment is required just for the bending equipment. Moreover, there were problems in that bending only the work rolls was effective only near the ends of the rolling mill, and was not effective for rolling in the middle.

On the other hand, a method that utilizes the tension distribution of a rolled material is generally known as a method that can control the shape of a rolled material without bending the work roll or the roll itself, such as a backing roll, as in a roll bending device. .

This method applies displacement in the vertical direction by partially pushing up the rolled material from below before or after passing through the rolling rolls, controls the tension distribution in the width direction of the rolled material, and corrects the distribution of reduction in the width direction of the rolled material. That is.

This method has the advantage that the load required to displace the rolled material in the vertical direction is smaller than that required for bending in the roll bending process.

Therefore, the present inventor obtained the above knowledge in view of the above-mentioned problems in shape control using the conventional roll bending device, and came up with the present invention.

[Purpose of invention]

The purpose of the present invention is to provide a device that corrects shape defects while controlling the widthwise distribution of tension in the rolled material by displacing the rolled material in the vertical direction before or after passing through the rolling rolls. An object of the present invention is to provide a tension distribution adjusting device in a rolling mill that can apply as wide a variety of vertical displacements as possible to a rolled material.

Another object of the present invention is to provide a tension distribution adjusting device in a rolling mill that can correct shape defects that occur on rolled materials of any thickness and width.

Furthermore, the purpose of the present invention is to have a simple structure and easy control, and to adjust tension distribution in rolled materials, which is suitable for automatically correcting shape defects on rolled materials by remote control. It provides equipment.

[Summary of the idea]

In order to achieve the above object, the present invention includes a guide beam which is rotatably supported along the width direction of the rolled material from the entry side to the exit side of the rolling roll, and a guide beam which is rotatably supported on the guide beam. A set of left and right slide arms whose base end portions are fitted so as to be slidable only in the longitudinal direction and whose tip portions extend in the moving direction of the rolled material; a roll support beam that pivotally supports one end of a rolled material supporting roll divided in the width direction of the rolled material and supports the other end via a roll tilting operation means;
A beam rotating means is connected to the guide beam and rotates the guide beam to move the roll in a direction perpendicular to the rolled material.

〔Example〕

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a diagram showing the basic principle of the present invention, Figure 4 is a partially cutaway front view of the device of the present invention, Figure 5 is a sectional view taken along line A-A in Figure 4, and Figure 6 is Figure 5B. -B sectional view and FIG. 7 are diagrams showing a bent state of the rolled material.

1 is a housing of a rolling mill, and inside the housing,
A pair of rolling rolls 2 with their respective axes horizontal and positioned in parallel with a gap substantially equal to the thickness of the rolled material, which will be described later.
a, 2 b are provided.

Above and below these rolling rolls 2a and 2b, backup rolls 3a and 3b are further provided so as to rotate while contacting the rolling rolls 2at2b.

On the other hand, a pair of pinch rolls 4a and 4b are provided outside the housing 1 of the rolling mill, and the axes of the rolls are parallel to each other, and the pinch rolls 4a and 4b are arranged vertically with a slight gap between them.

The pinch rolls 4a and 4b are for suppressing the vibrations of the rolled material that often occur when vertical displacement is applied to the rolled material using the device of the present invention, which will be described later. The structure is such that noise caused by vibration is reduced as much as possible.

The rolled material 5 is introduced into the housing 1 as indicated by the arrow in FIG.
After being rolled to a predetermined thickness by
It is configured to be carried out, further passed between pinch rolls 4a and 4b, and sent to a winding device (not shown).

In the above configuration, when the rolling process is performed, the rolling roll 2
As described above, the rolled material 5 after passing through the av2b has an uneven rolling state as shown in FIG. 1 or FIG. 2, that is, a defective shape.

Therefore, in the present invention, rolls 6 that are appropriately divided along the width direction of the rolled material 5 are provided below the rolled material 5 on the exit side of the rolling rolls 2a and 2b.

In particular, the illustrated example is configured to correct the middle elongation and ear waves (edge elongation) among various shape defects that occur on the rolled material, and the rolled material is placed under the rolled material on the exit side of the rolling roll. The rolls 6a and 6b are equally divided into two along the width direction, and are provided symmetrically from the center of the path of the rolled material.
The number and arrangement of the rolls are not limited to these, but may be divided into an appropriate number depending on the shape defect of the rolled material to be corrected.

The rolls 6a and 6b are rotatably supported at both ends of a roll support frame 9at9b via roller bearings 8 and the like with shafts 7 protruding from both ends thereof.

Brackets 1 are provided at both ends of the roll support frames 9a and 9b, respectively.
0a, lla, 10b, and llb are provided in a downwardly protruding manner, and the brackets 10a and 10b located particularly on the path center A side stand up from one end of the roll support beams 12a and 12b that are horizontally suspended below the rolls 6a and 6b, respectively. It is pivotally mounted on protruding brackets 13a, 13b by pins 14a, 14b.

Further, the brackets lla and llb provided at the other ends of the roll support frames 9a and 9b are connected to slide arms 15, which will be described later.
A hydraulic cylinder 16a, which is a roll tilting operation means, is provided on the side surface of the tip of the rollers a and 15b.

The piston rods 16b are pivotally connected to the tips of the piston rods 17a and 17b via connecting members 18a and 18b each having a U-shaped cross section.

Support frames 19a and 19b constituting the housing 1 of the rolling mill are provided on both sides of the conveyance path after passing through the rolling rolls, and brackets 20a and 20b that protrude toward the path center A are provided on these support frames 19at and 19b. ing.

On these brackets 20a, 20b are pedestals 21a,
21b is mounted and fixed, a hollow guide beam 22 is horizontally suspended between these frames 21a*21b, and bearings 23a,
It is rotatably supported via 23b.

Further, threaded rods 24a, 24b with threads carved oppositely to each other are installed in the guide beam 22, supported by bearings X, y, and sprockets 25a, 25b are mounted at one end of the threaded rods 24a, 24b. It is fixed and connected to a drive means (not shown) via a chain or the like.

Rotating hydraulic cylinders 26a, 26b, which serve as beam rotation means, are rotatably pivoted around shafts 27a, 27b as fulcrums on the side surfaces of the frames 21a, 21b, and their piston rods 28a
, 28b, one end of which is connected to the guide beam 22.
The tips of drive arms 29a and 29b are pivotally fixed to the drive arms 29a and 29b.

Further, the guide beam 22 passes through holes 30a*30b provided at the base end portions of the slide arms 15a and 15b that respectively protrude in the conveyance direction of the rolled material 5, and passes through the holes 30a*30b provided in the respective holes 30a and 30b. The screwing members 31a, 3 protruding from the
1b is threadedly connected to a screw rod 24 inserted into the shaft 22 through guide slots 32a and 32b formed along the longitudinal direction on the lower surface of the guide beam 22.

Next, the operation of the device of the present invention having the above configuration will be explained in detail.

As mentioned above, the rolled material 5 after passing between the rolling rolls 2a*2b often has an elongated state as shown in FIG. 1 or an ear wave (i.e., elongated end state) as shown in FIG. This results in defective shapes.

In the present invention, such a shape defect in the rolled material 5 can be corrected by displacing the rolled material 5 in the vertical direction after passing through the rolling rolls 2a and 2b at individual points along the width direction of the rolled material 5. Correct by varying tension.

Specifically, when the middle elongation state as shown in FIG.
Apply a vertical displacement that gradually increases, and conversely, if an ear wave condition as shown in FIG. 2 occurs, apply a vertical displacement that increases sequentially from both ends of the rolled material 5 toward the center. All you have to do is give.

Therefore, when the rolled material 5 is in an elongated state, the threaded rod 24 is rotated in a desired direction via the sprockets 25a and 25b, and the rotating arms 15a and 15b are moved along the guide beam 22. The positions of the rolls 6a and 6b in the width direction are determined according to the width of the rolled material 5 to be transported.

Next, the tilting hydraulic cylinders 16a, 16b are driven to increase the amount of protrusion of the piston rods 17a, 17b, and the rolls 6av6b are moved to the shaft 14a.

14b as a fulcrum, it is tilted gradually downward toward the path center A, and at the same time, the rotating hydraulic cylinder 26a
, 26b to drive its piston rod 28a,
The amount of protrusion of the roll 6at6b is reduced, and the roll 6at6b is raised while being rotated as a whole using the guide beam 22 as a fulcrum.

In this way, the rolled material 5 is pushed upward while being bent along the upper surfaces of the rolls 6a, 6b as shown by the imaginary lines in FIG.

As a result, the vertical displacement of the rolled material 5 along the width direction gradually increases from the center toward both ends, and the tension increases from the center toward both ends as shown in FIG. will be corrected.

On the other hand, if an ear wave (edge elongation state) occurs as shown in FIG.
After determining the widthwise position of the hydraulic cylinders 16a, 1
6b is driven to reduce the amount of protrusion of the piston rods 17a, 17b, and the rolls 6a, 6b are moved to the pins 14a, 1.
4b as a fulcrum, it is tilted gradually from the center toward both ends.

At the same time, the hydraulic cylinders 26 a and 26 b are driven to reduce the amount of protrusion of the respective piston rods 28 at 28 b, and the guide beam 22 is rotated clockwise in FIG. Rotate around the center and raise the entire body.

In this way, the rolled material 5 gradually lowers along the upper surfaces of the rolls 6a and 6b from the center toward both ends, contrary to the imaginary line in FIG. 4, and bends into a so-called bent state. I am pushed upwards.

As a result, the displacement in the vertical direction along the width direction of the rolled material 5 gradually increases from both ends toward the center, and the tension increases from both ends toward the center, correcting the ear wave condition. .

The above operation is performed by converting plate shape and plate width signals detected by plate shape and plate width detection means (not shown) provided behind the rolling rolls 2a and 2b into correction signals via an arithmetic circuit, etc. Each hydraulic cylinder 1 according to the correction signal
6a, 16b, 26a, 26b and sprocket 25
This is done automatically by appropriately operating the a, 25 and b.

The above explanation is merely an example of shape control using the device of the present invention, and in short, when it is desired to increase or decrease the tension uniformly along the width direction of the rolled material 5, the hydraulic cylinder 26 is used.
It is sufficient to rotate the guide beam 22 by driving the hydraulic cylinders 16a and 26b, and if it is desired to vary the tension of the rolled material 5 individually along the width direction, the hydraulic cylinders 16a and 16b can be used to rotate the guide beam 22.
The rolls 6a and 6b can be tilted by driving the sprocket 6b, and by adding movement of the rolls 6a and 6b in the sheet width direction by rotationally driving the sprockets 25a and 25b to these operations, any thickness can be achieved. This makes it possible to control the shape and width of the rolled material.

[Effect of idea]

As is clear from the above, the present invention provides the following effects.

(1) A roll divided in the width direction of the rolled material is moved in a direction perpendicular to the rolled material by rotation of a guide beam, and moved in the width direction of the rolled material by sliding a slide arm along the guide beam, and Since the roll tilting operation means on the slide arm is used for tilting, the entire structure is consolidated based on the guide beam, and the structure can be simplified to some extent.

(2) Since the rolls can be moved arbitrarily as described above, it is possible to correct defects in shape that occur on rolled materials of any thickness and width.

(3) Since the structure is simple, it is not only easy to control with high precision, but also easy to manufacture and maintain, and can be manufactured at low cost.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Figures 1 and 2 are diagrams showing defective shapes of rolled material, Figure 3 is a diagram of the principle of the invention, and Figure 4 is an illustration of the apparatus of the invention. 5 is a sectional view taken along the line AA in FIG. 4, FIG. 6 is a sectional view taken along the line BB in FIG. 5, and FIG. 7 is a view showing the rolled material in a bent state. In the drawings, 2a and 2b are rolling rolls, 5 is a rolled material, and 6.
6a, 6b are rolls, 12a, 12b are roll support beams, 15a, 15b are slide arms, 16a, 16b
22 is a guide beam, and 26a and 26b are rotating hydraulic cylinders that are beam rotation means.

Claims (1)

[Scope of utility model registration request] A guide beam is provided along the width direction of the rolled material from the input side to the output side of the rolling roll, and is rotatably supported, and a base end is slidable only in the longitudinal direction on the guide beam. a pair of left and right slide arms that are fitted and whose tips extend in the moving direction of the rolled material, and a rolled material that is provided at the tips of these slide arms and divided in the width direction of the rolled material; a roll support beam that pivotally supports one end of the support roll and supports the other end via a roll tilting operation means; and a roll support beam that is connected to the guide beam and rotates the guide beam to move the roll in a direction perpendicular to the rolled material. 1. A tension distribution adjusting device in a rolling mill, comprising a beam rotating means for moving the tension distribution device.