JPH10113856A - Brush device for grinding front and rear sides of steel strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily cope with the variation of steel strip widths and to also easily reflect the kind and the manufacturing conditions of steel strips, the manufacturing conditions in the upstream process or the surface observation results after grinding on the brush operation conditions. SOLUTION: This brush device grinds, by means of rotary brushes, the front and rear sides of a steel strip which is transported between the rotary brushes which are relatively disposed on upper and lower sides. The upper and lower brushes 11 and 12 are divided in a plurality of brushes, and there is provided a moving and position fixing mechanism which moves respective divided brushes 11a to 11d and 12a to 12d in an axial direction independently or sychronistically and fixes them at a predetermined position. There is provided an approaching and separating mechanism which moves at least one brush 11 or 12 relative the other brush 12 or 11 to let it approach or separate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush device installed in a pickling line facility for grinding the front and back surfaces of a steel strip.

[0002]

2. Description of the Related Art A brush device is provided for the purpose of removing a thin layer on a surface such as an oxide scale generated on the surface of a steel strip or changing the surface state. As shown in FIG. 5, this brush device presses the brushes 1a and 1b, which are vertically arranged relative to each other, against the steel strip 2 at a constant pressure while rotating them. It could not respond to change in detail.

[0003] For example, in the case of an pickling line, materials having different sheet widths from a wide steel strip 2 as shown in FIG. 5A to a narrow steel strip 2 as shown in FIG. Although the brush is continuously conveyed, the width of the brush is made according to the maximum width of the applicable steel strip. Further, the grinding location at the position in the width direction of the coil varies depending on the type of steel, the manufacturing conditions in the upper process, and even within a single coil, but the conventional brush device could not precisely meet these requirements. Similarly, the use conditions of the brush can roughly correspond to the number of rotations, the rotation direction, the pressing force, and the like of the brush, but cannot correspond finely.

[0004]

As described above, the conventional brush device has not been able to cope with changes in the manufacturing conditions and conditions of the steel strip in detail, and therefore has the following problems. Was. Since the brush width is manufactured according to the maximum width of the applied steel strip as shown in FIG. 5, it cannot cope with a change in the width of the steel strip. Therefore, when grinding the largest wide steel strip, it is good,
When grinding narrow steel strips, the brush works effectively only on the steel strip, so the parts outside the steel strip are worn only by the brushes contacting each other. As the running cost of the brush increases,
Grinding could not be concentrated on the required width direction position, and the grinding effect was small.

[0005] Since it was difficult to reflect the steel type of the steel strip, the manufacturing conditions, the manufacturing conditions of the above processes, and the surface observation results after grinding in the brush operating conditions, it was inevitable that the brush conditions be compatible with all materials. The grinding effect was small due to unnecessary grinding. Therefore, there are problems such as a decrease in line speed, a decrease in yield, and an increase in running cost of the brush. In addition, since there is no reflection from the surface observation results, there is a problem that the surface quality of the steel strip is deteriorated.

The present invention has been made in view of the above-mentioned conventional problems, and can easily cope with a change in the width of a steel strip. It is an object of the present invention to provide a brush device that can easily reflect a later surface observation result in a brush operating condition.

[0007]

In order to achieve the above-mentioned object, a brush device for grinding the front and back surfaces of a steel strip according to the present invention divides a plurality of brushes which are vertically arranged relative to each other, and divides the divided brushes respectively. The brushes can be moved separately or synchronously in the axial direction, and can be fixed at a predetermined position, and at least one of the brushes can be moved toward and away from the other brush. By moving the divided brushes in the axial direction and changing the distance between the upper and lower brushes, it is possible to cope with the width of the steel strip and the grinding position, as well as the steel type of the steel strip, the manufacturing conditions, and the manufacturing of the upper process. The conditions and the surface observation results after grinding can be reflected in the brush operating conditions.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A brush device for grinding front and back surfaces of a steel strip according to the present invention is a brush device for grinding front and back surfaces of a steel strip conveyed therebetween by rotating brushes arranged vertically one above the other. Each of the brushes is divided into a plurality of parts, and these divided brushes are individually or synchronously moved in the axial direction, and a moving and position fixing mechanism for fixing at a predetermined position, and at least one of the brushes with respect to the other brush. And a contact / separation moving mechanism for moving the contact / separation.

In the brush apparatus for grinding the front and back surfaces of a steel strip according to the present invention, when the width of the steel strip or the grinding position is changed, the brushes divided into a plurality of pieces are moved individually or synchronously in the axial direction, and then moved in predetermined directions. It corresponds by fixing at the position. Further, when reflecting the steel type of the steel strip, the manufacturing conditions, the manufacturing conditions in the above process, and the surface observation result after grinding in the brush operating conditions, the distance between the upper and lower brushes is changed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A brush device for grinding the front and back surfaces of a steel strip according to the present invention will be described below with reference to an embodiment shown in FIGS. FIG.
Is an overall schematic diagram of the brush apparatus for grinding the front and back surfaces of the steel strip of the present invention,
2 is an enlarged view of a main part of FIG. 1, FIG. 3 is a side view of FIG. 2, and FIG. 4 is an arrangement diagram of brushes when grinding a steel strip using the steel strip front and back grinding brush device of the present invention. (A) shows a case where a narrow steel strip is ground, and (b) shows a case where only an end is ground.

In FIG. 1 to FIG. 4, reference numerals 11 and 12 denote an upper brush and a lower brush which are arranged to face each other up and down. It is designed to rotate separately. In the brush device of the present invention, the upper brush 11 and the lower brush 12 are both
11d and 12a to 12d.
Upper brush 1 divided into four, 11d and 12a-12d
Each of the lower brush 1 and the lower brush 12 can be individually or synchronously moved in the axial direction by a moving and position fixing mechanism, and can be fixed at a predetermined position.

That is, each of the divided brushes 11a to 11a
For example, a solenoid 13 is embedded in the inner surfaces of the brush 11d and the divided brushes 12a to 12d.
4 is fitted at the base end side. The tip end of the iron piece 14 has a rotating tube 15 or 1 on which the divided brushes 11a to 11d and the divided brushes 12a to 12d respectively fit.
6 through the groove 15a or 16a provided in the rotary tube 1
The iron piece 14 is always urged in the opposite direction to the solenoid 13 by a spring 17 disposed between the solenoid 13 and the rotary pipe 15 or 16.

With the above construction, the divided brushes 11a to 11d and the divided brushes 12a to 12d do not rotate relative to the rotating
It can be moved in the axial direction by being guided by the groove 15a or 15b of 5 or 16.

The tip of the iron piece 14 has a female screw 14a.
As described above, a direction opposite to the solenoid 13 (the rotating pipe 15
The female screw 14a is screwed into a screw shaft 19 rotatably supported via a bearing 18 in the rotary tube 15 or 16 in a state where the female screw 14a is urged in the axial direction (a, 16a). The screw shaft 19 is connected to a motor 21 via, for example, an electromagnetic clutch 20. Accordingly, by turning the electromagnetic clutch 20 on and off, the screw shaft 19 is rotated by the rotating pipe 15 or 16.
, Or rotate integrally with the rotating tube 15 or 16.

When the motor 21 is rotated by, for example, connecting the electromagnetic clutch 20 by the above-described moving and position fixing mechanism, the upper divided brushes 11a to 11d and the lower divided brushes 12a to 12d become the rotating pipe 15 respectively. Groove 1
5a, or guided by the groove 16a of the rotating tube 16, it moves in the axial direction without rotating relative to the rotating tube 15 or 16. At this time, when the screw shaft 19 is provided with a reverse screw at the center in the longitudinal direction as in the present embodiment, the divided brushes 11a, 11b (12a, 1b) on the left side in the drawing are provided.
2b) and the right divided brushes 11c, 11d (12c, 1).
2d) moves toward and away from each other. On the other hand, when the screw shaft 19 has the same screw, the upper divided brushes 11a to 11d and the lower divided brush 12a
To 12d move in the same direction.

When the electromagnetic clutch 20 is disengaged, the screw shaft 19 rotates integrally with the rotary tube 15 or 16, and the upper divided brushes 11a to 11d and the lower divided brushes 12a to 12d.
Reference numeral 12d rotates in a fixed state at a fixed position without moving relative to the rotating pipes 15 or 16, respectively.

The female screw 14 of the iron piece 14
a is screwed into the screw shaft 19, the solenoid 13 is energized to force the iron piece 14 against the urging force of the spring 17,
3 is released when it is adsorbed on the surface 3. Therefore, with respect to the divided brush in which the female screw 14a and the screw shaft 19 are released from each other, even if the electromagnetic clutch 20 is connected and the motor 21 is rotated, the groove 15 of the rotary pipe 15 or 16 is not rotated.
a or 16a does not move in the axial direction.

Reference numerals 22 and 23 denote, for example, hydraulic cylinders, which are contacting / separating moving mechanisms, which are used to reflect the steel type of the steel strip, the manufacturing conditions, the manufacturing conditions in the upper steps, and the surface observation results after grinding in the brush operating conditions. The upper brush 11 is moved toward and away from the lower brush 12 and the lower brush 12 is moved toward and away from the upper brush 11 along a guide not shown.

The brush apparatus for grinding the front and back surfaces of a steel strip according to the present invention has the above-described configuration. Next, a method of grinding the front and back surfaces of the steel strip 2 conveyed through the pickling line using this brush apparatus will be described. I do. The steel type of the steel strip 2 transported on the pickling line is as follows:
For example, a low carbon steel strip, a high carbon steel strip, and an ultra low carbon steel strip have a maximum width of 1600 mm and a minimum of 600 mm, and a maximum thickness of 7.0 mm and a minimum of 1.2 mm. And
In the brush device of the present invention used for grinding, the width of the center divided brushes 11b, 11c, 12b, 12c is 300 mm,
A nylon brush containing abrasive grains having a width of 500 mm and an outer diameter of 400 mm is used for the divided brushes 11a, 11d and 12a, 12d on both sides, and is rotated in a direction opposite to the conveying direction of the upper and lower steel strips 2 at a rotation speed of 600 rpm. Is the base. Also,
The pressing force per unit width is based on 5 kg / cm.

For example, the steel strip 2 has a maximum width (1600 mm)
In this case, as shown in FIG. 1, the divided brushes 11a to 11d constituting the upper brush 11 and the divided brushes 12a to 12d constituting the lower brush 12 are collected and ground at the center.

Next, the steel strip 2 to be ground has a narrow width (600 m).
4 (a), the outer divided brushes 11a, 11d and 12a, 12d are moved outward and ground as shown in FIG. 4 (a). On this move,
First, the inner divided brushes 11b, 11c and 12c
By energizing only the solenoid 13 embedded in the solenoids b and 12c, the iron pieces 14 of the divided brushes 11b and 11c and 12b and 12c are attracted to the solenoid 13, and the screwing between the female screw 14a and the screw shaft 19 is released. In this state, the electromagnetic clutch 2
0 and the motor 21 is rotated, the solenoid 1
The divided brushes 11a, 11d and 12a, 12d located outside the iron piece 14 on which the iron piece 14 is not adsorbed are the iron pieces 14
The female screw 14a and the screw shaft 19 are moved in the direction in which they are separated from each other.

At this time, as shown in FIG. 4A, upper and lower divided brushes 11a and 12a and 11d and 12d
When the separation distance between the upper divided brushes 11a, 11d and the lower divided brushes 12a, 12d is changed to prevent the brushes from coming into contact with each other and to prevent brush wear and power loss, the motor of the upper brush 11 The rotation speed of the lower brush 12 and the rotation speed of the motor 21 of the lower brush 12 are changed, and the divided brushes 11a and 11d of the upper brush 11 located outside are changed.
The upper and lower divided brushes 11b, 11c and 1
As in the case of 2b and 12c, the screwing between the female screw 14a and the screw shaft 19 is released, and when the lower divided brushes 12a and 12d positioned outside by a predetermined distance are separated from each other, the upper divided brush positioned outside is separated. After stopping the energization of the solenoids 13a and 11d and screwing the female screw 14a and the screw shaft 19, the upper motor 21 may be rotated.

Next, when grinding only 300 mm on both sides of the steel strip 2 having a width of, for example, 1200 mm depending on the type of the steel strip 2 or the polishing result of the surface, FIG.
(B) As shown in FIG.
b, 11c and 12b, 12c are used on both sides of the steel strip 2. When moving from the state shown in FIG. 4A to the state shown in FIG.
, The upper divided brushes 11a to 11d and the lower divided brushes 12a to 12d may be moved in directions separating from both sides.

The above description is based on the change of the width of the steel strip 2 and the change of the grinding position.
This is the description of the case of moving the 12d, but the case of making the operation conditions of the brush correspond will now be described. The operating conditions of the brush are the pressing force against the steel strip 2 and the number of rotations, and the number of rotations is the number of rotations in a broad sense including the direction of rotation.

The pressing force directly affects the grinding result and the running cost, and the rod of the hydraulic cylinder 22 or 23 is moved back and forth based on the steel type, manufacturing conditions in the upper process, and surface observation results before and after the grinding. To change the pressing force. The number of revolutions is also changed based on the type of steel, the manufacturing conditions in the above process, and the results of surface observation before and after grinding. At this time, since the pressing force and the number of rotations are correlated, the conditions are not independently set, but the two conditions are selected simultaneously.

For example, as a result of surface observation, if the front surface has good descalability but the back surface has poor descalability, the pressing force of the lower brush 12 is reduced by 5 kg by projecting the rod of the lower hydraulic cylinder 23. / Cm to 7 kg / cm. If there is a descaling width direction characteristic in the coil length direction, the position of the divided brush is changed in the coil as described above. For example, the descaling at the center of the width of the steel strip 2 is poor at the leading end 20 m and the trailing end 15 m of the coil, and the descaling at both sides of the steel strip 2 is poor at the center in the longitudinal direction of the coil. At 20m,
The divided brushes are arranged as shown in FIG.
Pressing pressure per unit length of brush roll is 7 ~ 8k
Descale intensively as g / cm. Then, at the center, the divided brushes are arranged as shown in FIG.
Further, at the rear end, the divided brush is moved again to a position as shown in FIG.

The mechanism for moving the divided brushes is not limited to this embodiment, but may be a mechanism for moving each divided brush by an actuator. Also, the mechanism for moving the upper and lower brushes in and out of contact is not limited to the hydraulic cylinder, but may be an appropriate mechanism such as a screw jack. Further, in this embodiment, the upper and lower brushes can be moved up and down, but only one of the brushes may be moved toward and away from the other.

[0028]

As described above, according to the brush apparatus for grinding the front and back surfaces of a steel strip according to the present invention, it is possible to easily cope with a change in the width of the steel strip, and at the same time, the steel type of the steel strip, the production conditions, and the production of the upper process. The conditions and the results of surface observation after grinding can be easily reflected in the brush operating conditions, so that grinding can be performed under optimum conditions and using only necessary brushes. Therefore, a grinding effect factory can be achieved while reducing the brush wear, and the brush replacement frequency is reduced due to the reduced brush wear.
Work efficiency also improves.

[Brief description of the drawings]

FIG. 1 is an overall schematic view of a brush device for grinding a front and back surface of a steel strip according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a view as seen from a side direction of FIG. 2;

FIGS. 4A and 4B are arrangement diagrams of brushes when a steel strip is ground using the brush apparatus for grinding front and rear surfaces of a steel strip according to the present invention, wherein FIG. 4A illustrates a case where a narrow steel strip is ground, and FIG. The case where only the end is ground is shown.

5A and 5B are schematic views of a conventional brush device, in which FIG. 5A shows a state in which a wide steel strip is ground, and FIG. 5B shows a state in which a narrow steel strip is ground.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Upper brush 12 Lower brush 13 Solenoid 14 Iron piece 14a Female screw 15 Rotating tube 16 Rotating tube 17 Spring 19 Screw shaft 20 Electromagnetic clutch 21 Motor 22 Hydraulic cylinder 23 Hydraulic cylinder

Claims (1)

[Claims] 1. A brush device for grinding the front and back surfaces of a steel strip conveyed between them by rotating brushes vertically arranged relative to each other, wherein the upper and lower brushes are each divided into a plurality of brushes, and each of the divided brushes is a shaft. A moving and position fixing mechanism for moving the brushes separately or in synchronism with each other and for fixing at a predetermined position, and a contact / separation moving mechanism for moving at least one of the brushes toward and away from the other brush. Brush device for grinding the front and back of steel strip.