JPH0673695B2 - Metal band surface brushing method and brushing apparatus - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a brushing method and an apparatus for removing deposits such as scales and fats and oils on the surface of metal strips.

[Conventional technology]

In the pickling treatment step of removing the surface scale when introducing the hot-rolled steel strip into the cold rolling step, the surface of the steel strip is often subjected to a brushing treatment in order to enhance the pickling efficiency. Further, the brushing treatment is also widely used as a means for removing rolling oil and other surface contaminants adhering to the surface of the steel strip. As shown in FIG. 8, the brushing process is performed by using a brush roll (10) having brushes (12) densely planted radially around the peripheral surface of the roll base (11) as shown in FIG. By arranging in the width direction (direction orthogonal to the steel strip transfer direction a) and continuously transferring the steel strip (s), the brush is brought into sliding contact with the steel strip surface while the brush roll (10) is rotating. Done. In addition, the steel strip (s) that is continuously transferred is usually accompanied by meandering (displacement in the direction of arrow e), and the width dimension of the steel strip (s) varies widely depending on the product specifications. As the roll (10), a roll having a sufficient length to cope with meandering of the steel strip and change in width dimension is used.

The brush of the brush roll (10) is worn out by repeating the brushing process. The wear does not occur uniformly over the entire length of the brush roll, and as shown in Fig. 8, the wear (D,
D) is particularly easy to proceed. This is because the brushes near the edge are repeatedly subjected to vigorous sliding contact and collision with the edge end face and the edge corners, as the brush roll rotates at high speed during the brushing process. When the local wear of the brush occurs, the long brush roll 1 is liable to be used due to the local wear of the other parts, although other parts are in a usable state.
The books have to be scrapped, forcing a significant waste.

As a countermeasure against this, the present applicant divides a long brush roll into a plurality of parts, and for example, as shown in FIG. 7, three short size brush rolls (10A) (10A) (10B) are set as one set of steel. A brushing device having a structure arranged in the width direction of the band (s) is provided (Jitsuko Sho 63-3705).

[Problems to be Solved by the Invention]

Side brush roll (10A) that is liable to cause uneven wear due to the split structure of the brush roll (10) as described above
(10A) can be replaced separately with the intermediate brush roll (10B), and the intermediate brush roll (10B) has less wear.
Since it can be used as it is, the economical waste as in the case of using the conventional long-length integral structure brush roll of FIG. 6 is eliminated. However, the side brush rolls (10A) (10A) are liable to have uneven wear (D), and their service life is short.

The present invention has been made for the purpose of minimizing local wear of side brush rolls in brushing using the above-mentioned split type brush rolls, improving their service life, and reducing roll maintenance. .

[Means for Solving the Problems]

The metal strip surface brushing method of the present invention covers the entire plate width of the metal strip with a plurality of short brush rolls having a body length shorter than the width dimension of the metal strip, and the sum of which is larger than the width dimension of the metal strip. In the brushing method of the surface of the metal strip in which the brush roll is slidably contacted with the surface of the metal strip that is continuously transported in a direction opposite to the transport direction in the brushing method of the metal strip that is located in the left and right edge portions of the metal strip. The brush roll (hereinafter referred to as the "side brush roll") should be slid into sliding contact with the metal strip by inclining it so that the angle θ (Fig. 4) of the roll axis with respect to the metal strip transfer direction becomes θ <90 °. It has a feature.

The brushing device of the present invention for performing the brushing is such that each of the short brush rolls is connected to the rotation driving device and is arranged in the width direction so as to cover the entire plate width of the metal strip. The brush roll has an angle θ (Fig. 4) of the roll axis with respect to the transfer direction of the metal strip,
The feature is that they are tilted so that θ <90 °.

[Action]

As shown in FIGS. 6 and 7, in the conventional brushing performed by disposing the brush rolls in the direction (θ = 90 °) orthogonal to the transfer direction of the metal strip, the brush of the edge portion of the metal strip is significantly biased. The abrasion is caused because the brush passes through the edge portion in the direction opposite to the transport direction of the metal strip while rubbing the corner portion and the end surface of the edge portion.

Unlike this, side brush roll (10A) (10A)
In the direction inclined with respect to the transfer direction of the metal strip ((Fig. 4,
In the present invention in which brushing is performed by arranging at θ <90 °), the brush of the edge portion of the side brush rolls (10A) (10A) is indicated by the arrow C attached to the brush roll (10A) in the figure. , It passes through the edge part in the direction of protruding from the inside of the metal strip (inside the plate surface) to the outside, so there is almost no brush rubbing or collision with the corner part or end face of the edge as in the case of θ = 90 °, so the edge is Occurrence and progress of uneven wear of the brush near the portion are suppressed and prevented.

When the inclination direction of the side brush roll is opposite to that of the present invention and θ> 90 °, the brush of the edge portion is
Since the brush passes through the edge portion while colliding from the outside of the edge toward the corner or end face of the edge, uneven wear of the brush is promoted rather than the conventional one. Therefore, the side brush rolls must have θ <90 ° on both the left and right sides.

In the present invention, each of the short brush rolls constituting a set of brush rolls, if the horizontal shift drive control in the plate width direction of the metal strip, by changing the width dimension according to the product specifications of the metal strip, Regardless of the meandering of the metal strip due to continuous transfer, reliable brushing can be applied to the entire width of the strip at all times, and by adjusting the pressing force of the brush against the surface of the metal strip, wear of the brush can be prevented. Regardless of the degree, a certain brushing effect can be maintained.

〔Example〕

Hereinafter, the present invention will be described with reference to the drawings illustrating an embodiment. FIG. 1 shows an example of the arrangement of the brush rolls (10) in the present invention. The brush roll (10) in this example has three short brush rolls (10A) (10A) and (10A).
The brush roll (10B) which is configured as a set of B) and is located in the middle of the width direction of the steel strip (s) is the same as that in FIG. 7 with respect to the steel strip transfer direction (arrow a). The side brush rolls (10A) (10A) located on the left and right edges of the steel pair (s) on the other hand are different from those in FIG. 7 in the steel strip transfer direction (a).
They are arranged at an angle θ (Fig. 4) smaller than 90 ° and cover the steel strip (s) as a whole over the entire length in the width direction.

FIG. 2 shows another arrangement of the brush roll (10) of the present invention. The brush roll (10) in this example has 2
One set of side brush rolls (10A) and (10A), each with an inclination angle θ (Fig. 4) smaller than 90 ° with respect to the steel strip transfer direction, and the entire width of the steel strip (s). It is arranged so as to cover.

FIG. 3 is a side view of the brush roll portion (the diagram shows only the side brush roll (10A)). Except that the side brush rolls (10A) are inclined, the backup rolls (70) are arranged on the opposite side of the steel body (s) facing each brush roll, and each brush roll is It is no different from the conventional one that the sliding contact direction of the brush (12) pressed against the surface of the steel strip is rotationally driven in the direction (arrow b) opposite to the steel strip transfer direction (a).

FIG. 4 shows the sliding direction (arrow c) of the brush with respect to the surface of the steel strip (s) for the brush roll having the three-part structure of FIG. That the brush sliding contact direction (arrow c) of the intermediate brush roll (10B) arranged in the direction orthogonal to the steel strip transfer direction (a) is parallel to the steel strip transfer direction in FIG. Needless to say, it is the same, but the brush of the side brush roll (10A), which is inclined at an angle (θ <90 °) with respect to the steel strip transfer direction (a), has a tilt angle ( Corresponding to θ), slidable contact is made from the inside of the steel pair (s) toward the edge side. The figure shows only one side brush roll (10A), but the same applies to the other side brush roll. It is appropriate that the inclination angle (θ) of the side brush rolls (10A) (10A) is approximately 80 to 90 °.

FIG. 5 shows an example of the brushing device of the present invention.
(51) is a carriage, (40) is a rotating device for adjusting the inclination angle (θ) of the brush roll (10A), and (30) is a brush roll pressing force adjusting device for the steel strip surface. The transport direction of the steel pair (not shown) in the figure is the direction perpendicular to the paper surface.

The side brush roll (10A) is supported by bearings (21) (21) attached to the roll shaft (13) of the side brush roll (10A) so as to face the backup roll (70). (22) is a rotary drive shaft connected to a rotary drive source (not shown). The rotary drive shaft (22) is connected to the roll shaft (13) via a universal joint (23), and the rotational movement thereof is transmitted to the side brush roll (10A). The side brush roll (10A) is connected to a pressing force adjusting device (30) via connecting rods (25) (25). The pressing force adjustment device (30)
The hydraulic cylinder (31), the arm (32) connected to the piston rod of the hydraulic cylinder (31), the L-shaped sludge (33) (33), etc., and the L-shaped sludge (33) (33) The support bases (34) (34) fixed on the rotary table (41) are pivotally supported (35) (35) respectively, one end side of which is connected to the arm (32) of the piston rod and the other end. The side is a side brush roll (10A) through a connecting rod (25) (25)
Is connected to the bearing (21) (21). When the piston rod of the hydraulic cylinder (31) is driven back and forth, the forward and backward movement is performed by the side brush roll (10A) via the arm (32), the L-shaped levers (33) (33) and the connecting rods (25) (25). )
Is converted into a vertical motion of the brush, and the pressing force of the brush against the surface of the steel strip is adjusted by adjusting the displacement in the vertical direction.

The rotating device (40) for adjusting the inclination angle (θ) includes a rotary table (41) on which the brush roll pressing force adjusting device is mounted and a rotary table drive motor (fixed on the carriage (51). 43) consists of The drive motor (43) has a worm gear (44) on its rotating shaft, and the worm gear (4)
4) meshes with a gear (42) formed on the circumferential side surface of the rotary table (41). Gears (42) (42)
The horizontal rotation motion with the table center as the center of rotation is given to the rotary table (41) by the meshing of. By the rotational movement of the rotary table (41), the inclination angle (θ) of the side brush roll (10A) with respect to the steel strip transfer direction (fourth)
(Figure) Increase / decrease adjustment is performed.

The trolley (51) on which the rotary table (41), the table rotation drive motor (43) and the like are disposed can travel on a rail (52) disposed in the width direction of the steel strip and is not shown. The side brush roll (10A) is moved in the steel strip width direction (4th
Shift to arrow d). By this shift drive, the position control of the side guide roll (10A) in the width direction of the steel strip is performed in response to changes in the width dimension of the steel strip and meandering of the steel strip.

Although FIG. 5 shows only one side brush roll (10A), the other side brush roll (10A)
And the intermediate brush roll (10B) is also installed in the line with a similar mechanism. In the intermediate brush roll (10B) that does not require adjustment of the inclination angle (θ) with respect to the steel strip transfer direction, the rotary table (41) and its drive motor (43) may be omitted.

〔The invention's effect〕

According to the present invention, uneven wear of the brush at the steel strip edge portion, which is the main cause of scrapping of the brush roll, is effectively prevented, the service life is improved, the brush roll maintenance is reduced, and the brushing line productivity is improved. Is obtained.

[Brief description of drawings]

1 and 2 are plan views showing examples of arrangement of brush rolls according to the present invention, FIG. 3 is a side view of a brush roll portion, and FIG. 4 is a diagram showing a brush sliding contact direction with respect to a metal strip surface. FIG. 5 is a front view showing an embodiment of a brushing device of the present invention, FIGS. 6 and 7 are plan views showing the shape and arrangement of a conventional brush roll, and FIG. 8 is uneven wear of the conventional brush roll. It is a figure which shows typically. 10: Brush roll, 10A: Side brush roll, 13: Roll shaft, 21: Bearing, 22: Rotary drive shaft, 23: Universal joint, 30: Brush roll pressing force adjustment device, 31: Hydraulic cylinder, 41: Rotary table, Four
2: Gear, 43: Rotary table drive motor, 44: Worm gear, 5
1: trolley, 52: rail, 70: backup roll, S: steel strip

Claims (5)

[Claims] 1. A plurality of short brush rolls having a body length shorter than the width dimension of the metal strip and having a total sum larger than the width dimension of the metal strip so as to cover the entire width of the metal strip. In the brushing method of the metal strip surface in which the brush roll is rotated and slid on the surface of the metal strip to be continuously transferred in the direction opposite to the transfer direction, each brush roll located on the left and right edge portions of the metal strip is
Angle θ of the roll axis with respect to the metal strip transfer direction (Fig. 4)
However, the method for brushing the surface of a metal band is characterized in that the metal band is tilted in the direction of θ <90 ° and is brought into sliding contact with the metal band. 2. The brush roll is shift-driven in the width direction of the metal strip so as to cover the entire plate width of the metal strip in accordance with the meandering of the metal strip or the change in the width dimension of the metal strip. Item 2. The method for brushing the surface of a metal strip according to Item 1. 3. A plate of a metal strip, wherein each of a plurality of short brush rolls having a body length shorter than the width dimension of the metal strip and having a total sum larger than the width dimension of the metal strip is connected to a rotary drive device. In a brushing device that is arranged in the width direction so as to cover the entire width and is in sliding contact with the surface of a continuously transferred metal strip in the direction opposite to the transfer direction, each brush roll ( The "side brush roll" hereinafter is characterized in that the angle θ of the roll axis with respect to the transport direction of the metal strip (Fig. 4) is inclined so that the angle θ is 90 <90 °. . 4. The metal band surface brushing device according to claim 3, wherein each of the side brush rolls has a turning device for adjusting the increase or decrease of the inclination angle θ. 5. Each brush roll has a driving device for shifting in the width direction of the metal band, and a pressing force adjusting device for adjusting the pressing force of the brush against the surface of the metal band. The metal band surface brushing device according to claim 3 or 4.