JPH11319947A - Descaling apparatus in roller level - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove scales in a roller reveler in a more excellent method. SOLUTION: In a descaling apparatus, scales peeled from a surface of a work 3 to be straightened in a roller leveler straightening process are removed by generating the fluid flow in the direction of the roll body length by a nozzle device 5 provided between forward and rear straightening rolls 1, 1. The nozzle device 5 is provided with a first nozzle 11 to be directed to either of forward or rear straightening rolls 1, 1, and a second nozzle 12 to be directed toward the other side, and one of the first and second nozzles 11, 12 is for injection, and the other is for suction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scale removing device for a roller leveler which removes scale separated from the surface of a material to be corrected in a roller leveler correcting process by generating a fluid flow in a roll body length direction by a fluid purge.

[0002]

2. Description of the Related Art When a black-scaled material to be corrected is corrected by a roller leveler, the scale peeled off during the correction process is pressed into the material to be corrected by a roll downstream in the correction direction (the direction of movement of the material to be corrected (forward / backward direction)). Thus, there is a problem that flaws occur on the surface of the material to be corrected. In order to prevent such flaws from occurring, various types of roller leveler scale removal techniques have been proposed. For example, the one described in Japanese Patent Publication No. 51-17956 (hereinafter referred to as “prior art 1”) includes a plurality of straightening rollers between straightening rolls before and after a roller leveler along a roll body length direction (width direction of a material to be straightened). The air nozzles are arranged, and the ejection direction of the air nozzles is inclined along the roll body length direction. Then, the air nozzle generates an air flow in the roll body length direction, and the scale separated from the material to be corrected is blown off between the rolls in the roll body length direction to be removed.

[0003] Further, in Japanese Patent Application Laid-Open No. 54-65156 (hereinafter referred to as "prior art 2"), scale suction nozzles are provided before and after a straightening roll, and are formed on the upper and lower surfaces of a material to be straightened. By absorbing dust from the scale, a steel sheet having excellent quality was to be obtained. Further, the one described in Japanese Patent Application Laid-Open No. 4-94816 (hereinafter referred to as “prior art 3”) absorbs a scale suspended by an air blow with an endless belt and takes the scale out.
The scale on the strip plate surface was removed in a dry state.

[0004]

In the "prior art 1", the scale scatters in the gap between the roll and the material to be corrected.
There has been a problem that stagnation and indentation flaws easily occur.
In "Prior Art 2", there is a problem that it is difficult to peel the scale only by the suction force, and it is difficult to completely remove the scale. In "Prior Art 3", it is difficult to completely adsorb the floating scale, and the equipment is large-scale, and it is difficult to arrange the scale in a narrow space between adjacent rolls.

Accordingly, an object of the present invention is to provide a scale removing device for a roller leveler that has solved the above-mentioned problems.

[0006]

In order to achieve the above object, the present invention takes the following measures. That is, the present invention is a roller leveler that removes scale peeled from the surface of a material to be corrected in a roller leveler straightening process by using a nozzle device provided between front and rear straightening rolls to generate a fluid flow in a roll body length direction and remove the scale. In the device, the nozzle device includes a first nozzle pointing to one side of the front and rear straightening rolls, and a second nozzle pointing to the other side, and one of the first and second nozzles is , And the other is used for suction.

It is preferable to provide a switching device for switching the first and second nozzles between jetting and suctioning. The nozzle device further includes a third nozzle pointing toward the center between the front and rear, and the switching device is further configured to switch the third nozzle between ejection and suction.

The roller leveler is configured to be freely rotatable in forward and reverse directions, and the switching device is configured to operate in response to forward and reverse rotation of the roller leveler. The nozzle device,
Further, it is preferable to have a configuration in which a fourth nozzle for ejection is disposed at the end of the roll body length direction and is directed in the roll body length direction. According to the present invention having the above-described structure, the scale generated on the surface of the material to be corrected is blown off and separated by the jet flow from one nozzle, and flows in the roll body length direction, and floats in the air. Since the floating scale is sucked by the other suction nozzle, the problem that the scale scatters and stays in the gap between the roll and the material to be corrected and that the pressing flaw is easily generated is solved.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of a scale removing device in a roller leveler of the present invention. The roller leveler arranges the upper and lower straightening rolls 1 and 2 in a staggered manner, passes the material to be straightened 3 between the upper and lower rolls 1 and 2,
The third level is set. The upper and lower straightening rolls 1 and 2 are each backed up by a backup roll 4. The straightening rolls 1 and 2 are free to rotate forward and backward. That is, the roller leveler is of a reverse type.

[0010] The scale removing device includes a nozzle device 5 for causing the scale formed on the surface of the material to be corrected 3 to be separated and flown by the ejected fluid in the course of correction by the roller leveler, and for sucking the floating scale, and a roll body length direction. And a dust collecting device 6 that collects the scale that has been blown off. The nozzle device 5 is provided on the upper surface side of the material to be straightened 3, and has a pipe-shaped air arranged along the roll body length direction at the center between the rolls 1 and 1 arranged in the straightening direction. It has a header 7. On the underside of this header 7,
Nozzle mounting pipe at predetermined intervals along the roll body length direction
8 are provided at an inclination angle θ in the roll body length direction. A nozzle 10 is detachably attached to the lower end of the nozzle attachment tube 8 via a coupling 9.

The nozzle 10 has a tilt angle に 対 す る with respect to a vertical line.
The first is inclined at the front roll 1 (left side in FIG. 1).
It comprises a nozzle 11, a second nozzle 12 directed to the rear roll 1 (right side in FIG. 1), and a third nozzle 13 directed to the center. The inside of the header 7 and the mounting pipe 8 are provided with a first passage communicating with the first nozzle 11 and a second passage communicating with the second nozzle 12.
The passage is divided into a third passage communicating with the third nozzle 13. The first to third air pipes 14, 15, and 16 are connected to the respective passages, and the first to third valves that can be remotely operated are connected to the respective pipes 14, 15, and 16.
17,18,19 are provided.

Further, the first to third air pipes are connected to a switching device 20 comprising a solenoid valve or the like.
Is connected to a pressurizing device 21 and a depressurizing device 22. The pressurizing device 21 is composed of a compressor or the like, and the nozzle device 5
The depressurizing device 22 includes a vacuum pump or a blower, and sucks air from the nozzle device 5. And this switching device 20
The first to third air pipes 14, 15, 16 can be connected to either the pressurizing device 21 or the depressurizing device 22 so as to be switchable.

Further, the nozzle device 5 has a fourth nozzle 23 disposed at an end in the roll body length direction. This 4th nozzle
23 is arranged at the most upstream side of the air flow by the third nozzle 13 and is connected to the pressurizing device 21. In FIG. 1, when the material to be corrected 3 moves in the direction of the arrow, air is ejected from the second nozzle 12 directed to the biting side (rear side in the correction direction) and the third nozzle directed to the center. The switching device 20 is operated so that air is sucked from the first nozzle 11 which is directed to the exit side (the front side in the correction direction).

The material to be corrected 3 is located on the side opposite to the arrow direction.
When the nozzle moves, the switching device 20 operates so that air is ejected from the first and third nozzles 11 and 13 and air is sucked from the second nozzle 12. The first and second nozzles 1
The ejection and suction of 1, 12 may be reversed with respect to the traveling direction of the material to be corrected 3.

As shown in FIGS. 3A, 3B and 3C, the first and second nozzles 11 and 12 are used for jetting, and the third nozzle 13 is used in accordance with the properties of the scale and the correction conditions. For suction, or the first and second nozzles 11, 12 for suction,
The third nozzle 13 is used for ejection, and one of the first and second nozzles 11 and 12 is used for ejection, and the other is used for suction,
The third nozzle 13 can be used for suction.

In the above embodiment, when the material to be corrected 3 is moving in the direction of the arrow in FIG. 1, air is blown from the first nozzle 11 directed to the outlet roll 1 and the second nozzle is blown. The first to third valves 17, 18, and 19 are operated such that the air of 12 is stopped and the air is sucked from the third nozzle. Furthermore, the operating states of these valves 17, 18, 19 can be set arbitrarily. Further, the nozzle device 5 can be provided on the lower surface side of the material 3 to be corrected.

Further, the first, second and third nozzles 11, 12, 13
Were placed at the same position on the upper header 7, but each nozzle 11,1
The positions of 2, 13 may be shifted. The upper header 7 of the nozzle device 5 is configured to be able to move in the left and right positions depending on the width dimension of the material 3 to be corrected.
In addition, the height of the header 7 can be adjusted according to the type of the material 3 to be corrected. The position of the fourth nozzle 23 is also adjustable.

The present invention is not limited to the above embodiment. For example, the fluid ejected from the nozzle is not limited to air, but may be another fluid. Further, the present invention is not applied only to the reverse type leveler. Further, the inclination angle of the nozzle, the mounting pitch, the shapes of the suction port and the ejection port, etc. are appropriately changed according to the properties of the scale, the correction conditions, and the like.

[0019]

According to the present invention, scale can be effectively removed.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a scale removing device of the present invention.

FIG. 2 is a sectional view of FIG. 1;

FIG. 3 is a drawing of various combinations of suction and ejection of a nozzle device.

[Description of Signs] 3 Material to be corrected 5 Nozzle device 11 1st nozzle 12 2nd nozzle 13 3rd nozzle 20 Switching device 23 4th nozzle

Claims (5)

[Claims] 1. A scale removing device for a roller leveler for removing a scale peeled from a surface of a material to be corrected in a roller leveler correcting process by generating a fluid flow in a roll body length direction by a nozzle device provided between front and rear correcting rolls. In the nozzle device, a first nozzle pointing to one side of the front and rear straightening rolls, and a second nozzle pointing to the other side, one of the first and second nozzles,
A scale remover in a roller leveler that is used for ejection and the other is used for suction. 2. The scale removing device for a roller leveler according to claim 1, further comprising a switching device for switching the first and second nozzles between ejection and suction. 3. The nozzle device further includes a third nozzle pointing toward the center between the front and rear, and the switching device is further configured to switch the third nozzle between ejection and suction. 3. A scale removing device for a roller leveler according to claim 2. 4. The scale removing device for a roller leveler according to claim 3, wherein the roller leveler is configured to be rotatable in forward and reverse directions, and the switching device is configured to operate in accordance with forward and reverse rotations of the roller leveler. 5. The roller leveler according to claim 1, wherein the nozzle device further includes a fourth nozzle for ejection disposed at an end portion in the roll body length direction and directed in the roll body length direction. Descaler.