JPH0373259A - Maintenance cleaning device for roll - Google Patents

Abstract

PURPOSE:To securely restrain the partial wear of a roll over a long period of time by providing controllers which change the push-pressing force of a grindstone against the surface of the roll during the movement period of the grindstone. CONSTITUTION:The care of a roll 11 is conducted by moving in the rotation shaft direction of the roll 11 a grindstone 12 which push-presses the surface of the roll 11 and at the same time, is movable in the rotation shaft direction of the roll 11, by means of a drive means such as a chain 16 connected to the grindstone 12, or the like. The partial wear amount of the roll 11 surface with regard to the rotation shaft direction of the roll 11 is measured by means of a meter, for example, a non-contact type displacement meter 20 or the like before the care of the roll 11 is conducted, and in order to conduct grinding according to this measured partial wear amount, the grinding amount of the grindstone 12, that is, the push-pressing force of the grindstone 12 is changed by using controllers 18a, 18b in accordance with the wear amount of the roll 11 surface confronting the grindstone 12, that is, in accordance with the movement position of the grindstone 12. As a result, unevenness generated at the roll 11 surface can be leveled to a uniform surface.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a roll care device using a grindstone polishing method. More specifically, the present invention relates to a roll care device for a conductor roll used in a vertical plating cell, for example, when electroplating cold rolled steel sheets.

(Prior Art) In the manufacturing process of steel sheets, various rolls are used depending on the process6.For example, in the plating equipment of an electroplating line, a rubber-lined zinc roll is provided at the bottom of a vertical cell. , a hold-down roll and a chrome-plated conductor roll are provided above the vertical cell, and the current is supplied from this conductor roll. In the tank, anode electrodes are hung facing each other on both sides of the strip.

By the way, the roll profile of the conductor roll in the vertical plating cell of such an electric plating line is as follows:
This has become an important factor in operations. That is, uneven wear occurs on the surface of the conductor roll due to arc spots generated upon contact with the strip, adhered impurities, and the like. This uneven wear of the conductor roll induces meandering of the strip, warping in the width direction, etc., making it difficult to maintain a normal positional relationship with the edge mask, and furthermore causing wrapping of the plating solution and indentation flaws.

Therefore, in order to remove impurities and arc spots adhering to the surface of the conductor roll, a guide shaft that is installed below the conductor roll in the direction of the roll rotation axis is constantly reciprocated by a drive means such as a chain during operation. A roll polishing device was installed that had a grindstone that polished the surface of the conductor roll while moving. In this roll polishing device, the grindstone is installed on a chain that is moved in the direction of the roll rotation axis by an electric motor via a sprocket, and has a structure that allows it to perform reciprocating motion in the roll rotation axis direction to polish the roll. ing.

In addition, in order to polish the surface of the conductor roll, it is necessary to press the grindstone against the surface of the conductor roll. For this purpose, a counterweight is provided on the lever of the guide shaft, and the action of this counterweight allows the grinding wheel to be pressed against the surface of the conductor roll. The structure was such that the grindstone was pressed against the surface of the conductor roll.

However, with this device, the amount of counterweight cannot be changed during operation, so the pressing force is constant, and the worn roll shape is uniformly applied to both areas where uneven wear has occurred and areas where no uneven wear has occurred. Since the polishing is performed according to the angle of wear, uneven wear cannot be eliminated, and the above-mentioned problems caused by uneven wear cannot be eliminated.

Therefore, various proposals have been made to solve such problems. For example, (1) a roll care device t has a structure in which a vehicle body having a scraper blade is held at the tip of a pusher, a spring is provided inside the pusher, and the scraper blade is constantly pressed against the roll surface by the action of the spring; Showa 5
9-133666 Publication), ■ A roll care device having a structure in which the hand support device is moved in the roll axis direction and the hand support device attached to the tip of the hand support device is pressed against the roll surface by a pressing cylinder (Utility Model No. 61 Furthermore, Japanese Utility Model Application No. 63-39178 discloses a roll care device having a structure including a polishing roll formed by laminating a large number of polishing plates and a wiper roll equipped with a flexible cleaning member. be.

(Problems to be Solved by the Invention) However, these proposals have the following problems. That is, it is difficult to finely adjust the pressing force of the grindstone that polishes the roll surface, so uneven wear cannot be eliminated.

Furthermore, the device shown in (2) above moves a cart incorporating a pressing cylinder in the direction of the rotation axis of the roll, and can secure a sufficient working space, such as around the trunk of an LF roll. Although it is effective when used in a location, the device has an extremely large structure, and there are restrictions on installation space for conductor rolls used in locations where a large number of Metsuki cells are located close to each other. , and roll clean water (also used as grinding fluid)
It is not easy to realize this, as there are problems such as the amount of energy required for the equipment.

In other words, conventional roll care devices cannot reliably care for the surface of a roll, such as a conductor roll.

SUMMARY OF THE INVENTION An object of the present invention is to provide a roll care device that can solve the above problems.

(Means for Solving Problem 811) The present inventor has solved the aforementioned problems, namely (a) the inability to eliminate uneven roll wear, and (b)
In order to solve the problem that the device is large and difficult to apply as a conductor roll care device, various studies were conducted. As a result, ■ In order to solve the problem (a) above, the amount of wear in the direction of the rotational axis of the roll should be measured in advance before polishing, and the amount of polishing of the grindstone should be changed accordingly while polishing. We also found that it is effective to support the grindstone in a simpler structure rather than installing it via a cart. Therefore, based on these findings (1) and (2), the present inventor conducted further studies and completed the present invention.

Here, the gist of the present invention is a roll maintenance device using a grinding wheel force type, which includes (i) a grinding wheel that is pressed against the surface of a roll and is movable in the direction of the rotational axis of the roll; , (ii) a device connected to the grindstone to move the grindstone in the direction of the rotation axis of the roll;
i) A control device for changing the pressing force of the grindstone against the roll surface during the movement period of the grindstone.

(Function) In the present invention, a grindstone that is pressed against the surface of a roll and is movable in the direction of the rotation axis of the roll is moved in the direction of the rotation axis of the roll by a driving means such as a chain connected to the grindstone. Care for the roll by pressing it.

At this time, uneven wear occurs on a part of the surface of the roll in the direction of the rotational axis of the roll, so if you press the grindstone against the roll surface with a constant pressure and perform polishing, uneven wear will occur. Since both the parts that are worn and the parts that are not are polished uniformly, uneven wear cannot be eliminated and abnormal wear is induced. Therefore, in the present invention, before cleaning the roll, , the amount of uneven wear on the roll surface in the direction of the rotational axis of the roll is measured using, for example, a non-contact displacement meter, etc., and in order to perform polishing according to the measured amount of uneven wear, a grinding wheel facing the grinding wheel is used. The amount of polishing of the grindstone, that is, the pressing force of the grindstone, is changed using a control device according to the amount of wear on the roll surface, that is, according to the moving position of the grindstone.

With such II, the unevenness occurring on the roll surface can be smoothed out to form a uniform surface, and uneven wear can be reliably eliminated.

(Examples) Further, the present invention will be described based on Examples thereof, but these are merely illustrative of the present invention, and the present invention is not limited thereby.

Example 1 FIG. 1 is a schematic cross-sectional view showing a Metsuki cell using a roll care device according to the present invention, and FIG. 2 is a schematic cross-sectional view schematically showing a grinding wheel drive system of the roll care device according to the present invention. It is an explanatory diagram. Note that in Examples 2 and 3, which will be described later, the application site of the device according to the present invention to the Metsuki cell and the configuration of the grindstone drive system are the same, so they will be described together here.

In FIG. 1, as mentioned above, the zinc roll 2 and the electrode 5 are provided in the vertical cell 1, and the vertical cell l
A conductor roll 3 is provided above the edge mask. Then, the steel plate is sent into a vertical cell 1 while being passed around a conductor roll 3 and a zinc roll 2, respectively, and electroplated.

A roll care device 4 according to the present invention is installed on the lower surface of the conductor roll 3, and polishes the surface of the conductor roll 3.

Further, as shown in FIG. 2, the grindstone 6 connected to the chain 7 can be reciprocated in the direction of the arrow in FIG. Furthermore, as will be described later, 10 detects the amount of rotation of the sprocket 8.
This is a detection device that detects the moving position of the grindstone 6.

Next, the configuration of the apparatus according to the present invention will be explained in more detail using FIGS. 3(a) to 3(C).

Figure 3(a), Figure 3(b) and Figure 3(c)! !
, a schematic perspective view showing one embodiment of the device according to the present invention, a schematic cross-sectional view taken along the line A-A in FIG. In addition, in the embodiment shown below, the roll to be maintained is a conductive crawler IH provided in the continuous plating processing line of the stripper, hereinafter simply referred to as "roll 11". ) is used. Further, for convenience of explanation, the roll 11 is shown in a transparent state in FIG. 3(a).

In FIG. 3(a), reference numeral 12 denotes a grindstone for polishing the surface of the roll 11, and is fixed to a grindstone holder 13 below the grindstone by, for example, a presser plate.

A chain 16 is connected to this grindstone holder 7-13. The chain 16 is driven by the sprockets 17a to 1 using the grindstone drive system shown in FIG.
The rotating operation of the electric motor 15 is controlled by the grinding wheel holder 13 via 7d.
Finally, the grindstone 12 is moved back and forth in the direction of the rotation axis of the roll 11.

The whetstone holder 13 that holds the whetstone 12 fixedly holds the whetstone 12.
A grindstone support guide 14 that guides the movement of the roll 11 in the direction of the rotation axis and that passes through the chain 16 connected to the grindstone holder 13 extends for a length equal to or longer than the length of the roll 11 to be cleaned in the direction of the rotation axis, It is provided. That is, the support guide 14 is a U-shaped channel member, as shown in FIG. 3(b).
It has a structure in which the whetstone holder 13 slides inside it. In addition, FIG. 3(a) shows a state in which a part of the grindstone holder 13 is cut for convenience of explanation.

As shown in FIG. 3(a), this grindstone support guide 14 has cylinders 18 at both ends of its bottom.
a and 18b. The cylinders 18a and 18b adjust the pressing force of the cylinders based on a signal output according to the moving position of the grindstone 12 detected by the position detector 10 described above, and move the grindstone 12 in the direction of the rotation axis of the roll 11. The structure allows the pressing force on the roll surface to be changed as appropriate. The installation positions of the cylinders 18a and 18b with respect to the grindstone support guide 14 are not particularly limited, and it goes without saying that they may be installed at positions where the pressing force of the grindstone 12 against the surface of the roll 11 can be changed. Furthermore, in this example, the number of cylinders installed is two;
The invention is not particularly limited to this, and three or more may be installed at appropriate positions depending on the rigidity of the grindstone support guide 14, for example.

In addition, in FIG. 3(C), 2o is a displacement meter (distance meter) capable of detecting a change in the distance between the roll 11 and the grindstone 12 (or the grindstone holder 13). in particular,
An example is an optical non-contact displacement meter using a laser.

Next, the operation of the apparatus of this embodiment will be explained.

First, during non-operation periods such as during setup changes or maintenance stops, the displacement meter 20 shown in FIG.
For example, the distance between the grindstone 2o and the roll 11 is measured in the direction of the rotation axis, and the uneven wear amount of the roll 11, that is, the roll profile is measured. Note that this roll profile measurement is performed by returning the cylinders 18a and 18b so that the grindstone 12 does not interfere with the roll 11 and keeping the distance between the grindstone holder 13 and the roll 11 constant, as shown in FIG. 3(a). Rotate the electric motor 41115 to attach the whetstone holder 13
may be moved back and forth and measured using the displacement meter 20.

Based on the roll profile measured in this way, an appropriate amount of polishing in the direction of the rotation axis of the roll 11, that is, an amount of polishing that can eliminate uneven wear, is applied to several zones in the direction of the rotation axis of the roll 11. Set them separately.

Then, the pressing forces of the cylinders 18a and 18b that can achieve the polishing amount set in these several zones are also set. Note that the appropriate pressing force for the cylinders 18a and 18b at this time may be determined by checking in advance.

When the electric motor 15 is operated, the chain 16 rotates via the four sprockets 17a to 17d.
The grindstone holder 13 connected to the grindstone holder 13 also moves back and forth.

In this way, the grindstone 12 performs reciprocating motion on the lower surface of the roll 11.

At this time, the position of the grindstone 12 in the direction of the rotational axis of the roll 11 is detected by the position detector 10, and the position of the grindstone 12 in the rotational axis direction of the roll 11 is detected by calculation to determine which of the several zones it corresponds to, and the cylinders 18a and 18b set for this zone are determined. By making the pressing force variable, optimal polishing can be performed according to the amount of uneven wear in each zone, and uneven wear occurring on the surface of the roll 11 can be reliably eliminated.

In addition, in this embodiment described in detail above, the grindstone support guide 14, cylinders 18a and 18b, and position detector 1o are used as a "control device that changes the pressing force of the grindstone according to the moving position of the grindstone". However, the present invention is not limited to this method.

Therefore, other embodiments will be described below.

Embodiment 2 FIG. 4(a) is a schematic sectional view of another embodiment in which a roll care device according to the present invention is installed at the lower part of the roll 11, and FIG. FIG. 4(C) is a schematic perspective view of an example roll care device, FIG. 4(I))
It is a schematic cross-sectional view showing the A-A cross section in the grindstone 1.
Further, FIG. 4(d) is a schematic cross-sectional view showing the grinding wheel support guide 14 in an enlarged manner.

In FIGS. 4(a) and 4(d), the whetstone 12 is supported by a whetstone holder 13, and the whetstone holder 13 is supported by a whetstone support guide 14 having a different cross-sectional shape from that of the first embodiment. , direction of the rotation axis of the roll 11 (Fig. 4 (
It is installed so as to be movable in the direction perpendicular to the plane of the paper in a).

Note that the grindstone holder 13 is similar to the first embodiment as shown in FIG.
As shown in (b), the chain 16, the electric motor 15
, are movably installed by sprocket wheels 17a to 17c.

In this embodiment, the grindstone support guide 14 is shown in FIG.
As shown in b), it is supported by bearings 23a and 23b, and at one end of the grindstone support guide 14 there is a weight 22 (counterweight) for pressing the grindstone 12 onto the surface of the roll 11, and a weight lever 21. and a cylinder 24 are installed. That is, as shown in FIG. 4(C), the grindstone support guide 14 supported by the bearings 23a and 23b rotates around the penetrating portion of the chain 16 due to the action of the weight 22, and the grindstone support guide 14 is supported by the bearings 23a and 23b. The structure is such that a grindstone 12 provided at the tip of the grindstone 13 is pressed onto the surface of the roll 11.

As shown in FIG. 4(C), below the end of the weight lever 21, by pushing down this lever 21, a grindstone support guide I4 is rotated, and the grindstone 12 is rotated.
A pressing cylinder 24 that can change the pressing force against the roll 11 is provided. That is, in the first embodiment, the pressing force of the grinding wheel 12 is changed by the cylinders 18a and 18b that push the grinding wheel support guide 4, but in this embodiment, the pressing force of the grinding wheel 12 is changed by the cylinder 24 that pushes down the weight lever 21. This causes the pressure to change. By setting fl like this,
This is more suitable because it is possible to reduce the load on the cylinder, and to achieve the cylinder entry/exit positions set in several zones as described above in a short time.

It should be noted that the configuration of this embodiment other than the above is the same as the roll care device of embodiment 1, and has completely the same effects, so further explanation will be omitted.

Furthermore, the grindstone 1 shown in Example 1 and Example 2
Since there is a simpler supporting means in addition to the second supporting means, this will be briefly described as a third embodiment.

Embodiment 3 FIGS. 5(a) and 5(b) are a top view and a sectional view, respectively, showing the support structure of the whetstone 12 in this embodiment, and the whetstone 12 attached to the whetstone holder 13 is , the grindstone is pressed directly to the roll 1 by the cylinder 25.
It is pressed against the surface of 1. Note that 26 is a stand for mounting the cylinder, and 27 is a sliding base that supports 26 in a slidable manner.

In this way, the grinding wheel 12 may be supported in the first and second embodiments, and by doing so, the grinding wheel 12
The pressing force can be adjusted more finely, and uneven wear can be more reliably eliminated.

Furthermore, the effects of the present invention will be further clarified using data in Examples.

Example 4 First, the amount of uneven wear of the conductor roll 1 and the conductor roll 2 was measured using the apparatus shown in FIGS. 3(a) to 3(C) as described above. The measurement was carried out once every three weeks when the roll was stopped.The measurement results are shown graphically in FIG.

The conductor roll 1 and the conductor roll 2 were then cleaned during operation using the roll cleaning device shown in FIGS. 3(a) to 3(C).

At this time, the roll was maintained by dividing it into three zones in the direction of the roll rotation axis. In this manner, the uneven wear status of the roll was investigated using the 6-month roll.

The results are also shown in FIG.

As is clear from Figure 6, conventionally the maximum was approximately 2.5 m.
It can be seen that the present invention was able to suppress the existing uneven wear to about 0.8 mm over a long period of 6 months.

(Effects of the Invention) As described above in detail, according to the present invention, uneven roll wear could be reliably suppressed over a long period of time.

Therefore, if the roll care device according to the present invention is applied to a conductor roll used in a vertical plating cell when electroplating cold rolled steel sheets, for example, it will be possible to prevent strip meandering, prevent strip warping in the width direction, and prevent plating. The practical significance of the present invention is extremely significant, since it is possible to prevent the liquid from wrapping around the conductor roll, and also to prevent the occurrence of indentation scratches.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view showing a Metsuki cell using a roll care device according to the present invention; Fig. 2 is a schematic explanatory view schematically showing a grindstone drive system of the roll care device according to the present invention; Figure 3(a), Figure 3(b) and Figure 3(C) are respectively schematic perspective views showing the apparatus of the embodiment of the present invention.
A cross-sectional view taken along the line A-A in Figure (a) and a schematic side view showing the vicinity of the grinding wheel 12 in an enlarged manner; Figure 4 (a) shows a situation where a device according to another embodiment of the present invention is installed at the bottom of the roll. FIG. 4(B) is a schematic perspective view of the roll care device of another embodiment; FIG. 4(C) is a sectional view taken along line A-A in FIG. 4(0); FIG. 5(d) is a schematic cross-sectional view showing an enlarged view of the grinding wheel support guide 14; FIGS. Top view and cross-sectional view: and FIG. 6 are graphs showing the results of Examples. 1: Vertical cell 2 Herring roll 3: Conductor roll 4: Roll care device according to the present invention 5: Electrode 6: Grinding wheel 7: Chain 8: Sprocket wheel 9: Electric motor 10: Position detector 11: Conductor roll 12: Grinding wheel 13: Grinding wheel holder 14: Grinding wheel support guide 15: Electric motor 16: Chains 17a to 17d: Subrocket wheels 18a, 18b: Cylinder 20
= Displacement meter 21: Weight lever 22: Weight 23a, 23b: Bearing 24: Pressing cylinder 25: Cylinder 26: Cylinder mounting base 27: Sliding base plate 1

Claims (1)

[Scope of Claims] A roll care device using a grindstone polishing method, comprising: (i) a grindstone that is pressed against the surface of the roll and is movable in the direction of the rotation axis of the roll; (ii) connected to the grindstone. and (iii) a control device that changes the pressing force of the grindstone against the roll surface during the movement period of the grindstone. input device.