JPS633705Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a brushing device for descaling, degreasing, etc. on the surface of a metal strip such as a steel body, and in particular prevents uneven wear of the brushing roll and extends its useful life. The present invention relates to a metal band brushing device which is improved and also facilitates the work of replacing the rolls.

Generally, scale (oxide film) generated on the surface of a hot-rolled metal strip must be removed in order to carry out the next step of cold rolling. Pickling is commonly used as a descaling process for this purpose, but in order to improve production efficiency, it is effective to brush the surface of the metal strip with a brushing roll before pickling. It has been known.

Furthermore, oil such as rolling oil is attached to the surface of a cold-rolled metal strip, and the method using the brushing roll described above is also effective in removing this oil.

When this brushing is performed, the brushing roll is not worn uniformly over the entire length of the roll. Of course, the parts of the brushing roll that do not come into contact with the metal band are hardly worn, but even in the parts of the brushing roll that come into contact with the metal band, especially the parts that contact the left and right edges of the metal band. If such local wear (uneven wear) occurs, it becomes impossible to uniformly brush the metal band, and the above-mentioned effects of brushing are significantly reduced. Therefore, line work has to be interrupted and brushing rolls have to be replaced frequently.

The present invention has been developed in view of the above circumstances, and provides a metal band brushing device that prevents uneven wear of brushing rolls, improves their useful life, and facilitates the work of replacing the rolls. It is something to do.

The metal strip brushing device of the present invention comprises a plurality of brushes arranged in the width direction of the metal strip, each of which has a roll body length shorter than the width of the metal strip, and whose total length is greater than the width of the metal strip. Unit brushing rolls consisting of brushing rolls are installed at multiple locations along the metal strip transfer line at appropriate intervals, and each of the multiple brushing rolls constituting each unit brushing roll is is characterized in that it includes a drive device for shifting the metal strip in the width direction independently of each other, and a pressing force adjustment device against the surface of the metal strip.

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic front view showing a part of a brushing device according to the present invention (hereinafter referred to as the present device).

In the figure, 1 is a back-up roll, which is supported by an upper shaft 3 which is supported by a bearing 2 fixed in a fixed position. The backup roll 1
is formed so that its roll length is longer than the maximum width of the metal strip to be processed, and is fed in a direction perpendicular to its axis (in the figure, perpendicular to the plane of the paper). A metal band (not shown) is backed up from above.

A plurality of brushing rolls are arranged below the back-up roll 1 to brush the lower surface of the metal strip, but in the figure, only one brushing roll A is shown. It is shown. The brushing roll A is a roll in which a large number of hair-like bodies are radially planted on the outer peripheral surface of the roll body. The roll is a short roll having a body length shorter than the width dimension of the metal strip, and a unit brushing roll is constructed by arranging a plurality of short rolls as a set in the width direction of the metal strip. In Fig. 2, a unit brushing roll is composed of two brushing rolls A ₁ , A ₁ , and in Fig. 3, three brushing rolls A ₂ , A ₂ ,
This shows an example of a unit brushing roll made up of _A2 . Each brushing roll A ₁ , A ₁ ,
A ₂ , A ₂ , and A ₂ are shifted and driven in the width direction of the metal strip (roll axis direction) according to the width dimension of the metal strip, as shown by a solid line or a broken line.

Each unit brushing roll is such that the sum of the trunk lengths of the plural short brushing rolls constituting it is larger than the width dimension of the metal strip, and thereby the surface of the metal strip is coated from one edge to the other. There is continuous contact throughout the entire width up to the other edge.
Furthermore, since the metal strips are threaded in different widths depending on the product specifications, even when the widest metal strip is threaded, brushing can be done over the entire width. , a short brushing roll A constituting a unit brushing roll
It is a good idea to decide on the length and number of pieces.

The unit brushing rolls made up of the plurality of short brushing rolls are installed at a plurality of locations along the metal strip transfer line at appropriate intervals.

The brushing roll A is supported by a roll shaft 4 which is supported by bearings 5, 5.
The roll shaft 4 is connected via a universal joint 6 to a rotating shaft 7 that is directly connected to a rotational drive source (not shown). The rotational motion generated by the rotational drive source is transmitted to the roll shaft 4 and rotates the brushing roll A supported by the roll shaft 4. 6
is interposed, so even if the axis of the roll shaft 4 and the axis of the rotary shaft 7 do not match, or even if the relative positions of both shafts change, the rotational movement can be carried out smoothly on the roll shaft. 4 will be transmitted.

Bearings 5, 5 that pivotally support the roll shaft 4 are connected to one ends of L-shaped levers 9, 9, respectively, via connecting rods 8, 8, and the other ends of the levers 9, 9 are connected together. It is connected to a hydraulic cylinder 11 by a member 10. Since the levers 9, 9 are designed to rotate around the fulcrums 9a, 9a, the advancing and retracting movement of the roll of the hydraulic cylinder 11 is transmitted with its direction changed, and is transmitted by the roll shaft 4. The supported brushing roll A is capable of vertical movement. Therefore, by applying a predetermined pressure to the hydraulic cylinder 11 and advancing the rod, the brushing roll A is pressed against the metal strip backed up by the backup roll 1. The pressing force of the brushing roll against the metal strip can be adjusted by rotating the rams 9, 9 about the fulcrums 9a, 9a using the hydraulic cylinder 11. When replacing the brushing roll A, it goes without saying that the rod of the hydraulic cylinder 11 must be retracted to separate the brushing roll A from the metal band.

Support stands 12, 12 that support the rams 9, 9, and a support stand 13 that supports the hydraulic cylinder 11 are mounted and fixed on a truck 14. Casters 15, 15 are attached to the bottom of the trolley 14, so that it can move freely on a track 16 laid in the axial direction of each roll. Therefore, by moving the cart 14 on the track 16, the brushing roll A can be easily shifted in the width direction of the metal strip. Although not shown, it goes without saying that a braking mechanism for stopping the truck 14 at a desired position is also provided.

In the brushing process of the metal strip by the above-mentioned brushing device, when the brushing rolls are in a state with little uneven wear after they have been used for a while, in the example of Fig. 2, two brushing rolls A ₁ are used as shown in the figure. , Align the outer edges of A ₁ so that they almost match the left and right edges of the metal strip, and then
When brushing begins on the surface of the metal strip, the wear of the brushes in areas where brush wear is likely to occur, especially in the areas that contact the left and right edges of the metal band, progresses, and if left as is, the brushing effect on the edges of the metal band will be insufficient. When this occurs, as shown in Fig. 4, by shifting and driving the brushing rolls A ₁ and A ₁ outward in the width direction of the metal strip, the unevenly worn portion d of the brush b is removed. What is necessary is to retract the metal band to the outside of the edge and make the part with less uneven wear newly correspond to the edge part. When the metal strip is changed from a narrow width S ₁ to a wide width S ₂ or vice versa, the above positional relationship with respect to the metal strip surface is maintained according to the change in width dimension. What is necessary is to shift and drive the brushing rolls A ₁ and A ₁ in the axial direction.

Furthermore, it is well known that metal strips meander in the axial direction due to various reasons while running, that is, run in a state where the metal strip is deviated to the right or left of the line center. When the metal strip meanderes, its end protrudes outside the brushing roll and that part remains unbrushed. The above-mentioned inconvenience can be avoided by a simple measure of shifting and driving one of the brushing rolls A ₁ and A ₁ according to the width.

As shown in Figure 3, three brushing rolls
Even when a unit brushing roll is made up of A ₂ , A ₂ , and A ₂ , each brushing roll is changed in the same way as described above depending on the progress of wear of each brushing roll or the meandering of the metal band. A single roll shift drive is performed.

Note that metal strips are not necessarily completely flat in the width direction, and the shape of the edges (curvature, etc.) is generally different between the right and left sides.
Even if the metal strip has such a shape, the pressing force on the surface of the metal strip of each brushing roll A ₁ , A ₁ , A ₂ , A ₂ , A ₂ constituting the unit brushing roll is By making individual adjustments according to the planar shape of the metal strip, it is possible to achieve an even and uniform brushing effect.

In addition, although the above embodiment shows the case where the number of brushing rolls is up to 3, the number of brushing rolls is 4.
It goes without saying that the present invention can be easily applied to cases where there are more than one person.

Further, the brushing roll and backing roll may be arranged upside down, but even in that case, the basic idea of the present invention can be applied as is.

As described in detail above, the brushing device of the present invention uses a plurality of brushing rolls with short body lengths instead of a conventional uniaxial roll having a body length longer than the width of the metal strip. A unit brushing roll is made up of one set of single rolls, and each of the one set of short brushing rolls constituting each unit brushing roll has a shifting mechanism in the width direction of the metal band and a shift mechanism for the metal band surface. Since the structure has a pressing force adjustment mechanism, (i) the short brushing rolls constituting the unit brushing rolls can be adjusted depending on the width of the metal band and the uneven wear of the brushes in the part that contacts the edges; By shifting and driving the metal strip in the width direction of the metal strip, it is possible to always obtain a uniform brushing effect over the entire width of the metal strip, regardless of changes in the width dimension of the metal strip or uneven wear of the brush. can.

(ii) In the case of conventional uniaxial brushing rolls, if the brushes in the part that contacts the edge of the metal strip wear unevenly, even if the remaining brushes over a wide area are still usable, The brushing roll must be replaced with a new one, but in the device of the present invention, the unevenly worn part is shifted to the outside of the edge of the metal band by the shift drive of the brushing roll, and the part with less unevenly worn is brought into contact with the edge. , you can continue brushing. Therefore, effects such as efficient use of the brushing roll, thereby reducing roll cost, and reduction in the frequency of brushing roll replacement, thereby improving the productivity of the brushing line, can be obtained.

(iii) In the case of a conventional uniaxial brushing roll, a long body length that can accommodate the meandering of the metal strip is required, and even though it has such a long body length, it does not come into contact with the edge of the metal strip as described above. However, with the device of the present invention, the meandering of the metal strip can be dealt with by shifting and driving the short brushing roll, so the above-mentioned waste is completely eliminated. do not have.

(iv) The brushing roll has different brushes in each part, such as the part that contacts the central part of the metal strip and the part that contacts both sides of the metal strip, or the part that contacts one edge and the part that contacts the other edge. Although the rate of wear differs, in the device of the present invention, each unit brushing roll is composed of a plurality of short brushing rolls, so they can be replaced individually depending on the degree of wear. Therefore, there is no waste like in conventional uniaxial rolls.

(v) If the metal strip is curved in the width direction or there is a difference in the curvature of the left and right edges, the metal strips of each of the multiple brushing rolls constituting the unit brushing roll should be The pressing force against the surface can be adjusted individually according to the deformation of the metal strip, the shape of the edges, etc. Therefore, compared to the conventional uniaxial roll structure, the pressure force applied to the surface can be adjusted evenly over the entire width of the metal strip. A uniform brushing effect can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing a part of the proposed device;
Fig. 2 is a schematic plan view of the main parts of the proposed device when there are two brushing rolls, Fig. 3 is a schematic plan view of the main parts of the proposed apparatus when there are three brushing rolls, and Fig. 4 The figure is an explanatory diagram of main parts showing an example of occurrence of uneven wear of the brushing roll and shift drive of the brushing roll in response to the uneven wear. A, A ₁ , A ₂ : Brushing roll, S ₁ , S ₂ :
Metal band, 1: Backup roll, 14: Trolley,
15: Caster, 16: Orbit.

Claims (1)

[Scope of utility model registration request] A unit brushing unit consisting of a plurality of brushing rolls arranged in the width direction of the metal strip, each roll body length being shorter than the width dimension of the metal strip, and the sum of the body lengths being greater than the width dimension of the metal strip. The rolls are installed at multiple locations along the metal strip transfer line at appropriate intervals, and each of the multiple brushing rolls constituting each unit brushing roll is
A metal band brushing device characterized by comprising a drive device for shifting the metal band in the width direction of the metal band independently of each other, and a pressing force adjustment device against the surface of the metal band.