JPH02295609A - Roll wiper - Google Patents

Abstract

PURPOSE:To allow the adjustment of the pressing force onto wiping rolls so as to meet wiping conditions by freely rotatably mounting cylindrical bodies to the outer side of the eccentric sleeves of respective unit back up rolls so that the rotating angle positions of the eccentric sleeves can be adjusted. CONSTITUTION:If the working point patterns of the back up rolls of the roll wipers to be used under certain wiping conditions are set, the distances between the working points of the respective unit back up rolls 6 can be set at optimum lengths according thereto. The respective unit back up rolls 6 have no deforming materials, such as elastic bodies and, therefore, there are no problems even if such back up roll array 8 is strongly pressed to the wiping rolls 5 by a pressing means 10. Since the cylindrical bodies 13 have the freely rotatable structure, these bodies rotate without slipping with the traveling of a metallic body S. The formation of the working point patterns of any shapes in conformity with setting is possible, and therefore, the adjustment of the pressing force on the wiping rolls 5 to meet the wiping conditions is possible.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention uses wiping to remove rolling oil adhering to a metal strip after cold rolling evenly in the width direction and from the entire surface. This invention relates to a roll wiper equipped with a backup roll row in which a plurality of unit backup rolls are arranged in a straight line, each of which can be arbitrarily adjusted in order to generate an appropriate pressing force on the roll. [Prior Art] Cold rolling of a metal strip is performed by passing a rolled material through a cold rolling mill (hereinafter referred to as a mill). In this cold rolling, rolling oil is generally used for purposes such as cooling the rolling rolls and metal strip, improving the rollability of the metal strip, and removing wear particles generated from the metal strip. Such a cold rolling process will be explained with reference to FIG. 9, which shows one example.
An example of the cold rolling process is the case where a thin metal strip coil is first obtained and then used as a raw material to be rolled into an ultra-thin metal strip.
A metal band S unwound from a metal band coil attached to a reel 1 passes through a deflector roll 2 and enters the housing of a mill main body 3 (the illustrated example is a Sendzimya mill). At this time, rolling oil is sprayed from a rolling oil injection nozzle 3b installed near the rolling roll 3a. The metal strip S cold-rolled by the rolling roll 3a in this manner is passed through the deflector roll 2 and wound onto the reel 1' on the opposite side from the unwinding side. If the rolling rate is insufficient in such a single bus, the metal strip S is run in the opposite direction with the reel 1' side being the upstream unwinding side, and rolling oil is sprayed in the same way as above. Then cold rolling is performed. When cold rolling is performed at a relatively high speed using rolling oil in this way, the rolling oil adhering to the metal strip S may cause sideways slipping when the metal strip S is wound into a coil, making it difficult to wind it up properly. This may have an adverse effect on the subsequent treatment of the metal strip S after cold rolling, and it is uneconomical if the expensive rolling oil carried away by the metal strip S is simply consumed without being sufficiently recovered and utilized. Therefore, the rolling oil that adheres to the metal IFS, passes through the mill body 3, and fulfills its prescribed role is transferred to the wiping device installed on the winding side downstream of the mill body 3 in each running direction of the metal strip S. It is removed and recovered by fi4 or 4'. In addition to being efficient, wiping the rolling oil in this manner is performed evenly across the entire surface of the metal strip S in the width direction to prevent surface flaws and edge creases on the metal strip S in subsequent processes. This is important in order to prevent problems such as deterioration of the shape and deterioration of the product, deterioration in quality during processing after winding, operational troubles, and contamination of the working environment. However, for example, in the case of a normal roll wiper, if the contact pressure of the wiping roll against the metal band S is increased (usually by pressing both ends of the wiping roll shaft) in order to prevent the occurrence of surface flaws due to slipping, the wiping roll Disadvantages: Deflection occurs and the contact pressure at the center in the width direction weakens, making the wiping uneven in the width direction, and the rolling oil removal effect is poor.Also, the contact pressure at both ends increases, making the metal strip easily deformed. was there. In addition, in the case of a rubber hose wiper, the contact between the rubber hose and the metal band is good, and the rolling oil removal effect is excellent, but since the rubber hose is simply fixed or does not rotate, surface flaws are likely to occur on the metal band, and the rubber hose The disadvantage was that it required frequent replacement. Wiping the rolling oil evenly and without any other defects becomes extremely difficult as the thinner the metal strip is cold-rolled at high speed, and various methods and devices have been proposed and implemented for some time. However, each had advantages and disadvantages. Recently, a roll wiper has been developed which is equipped with two backup roll rows in which short rolls are consecutively arranged behind each wiping roll arranged above and below the passing path of a cold-rolled metal strip. Disclosed (Japanese Unexamined Patent Publication No. 63-30931
(See No. 7). This product uses short backup rolls (referred to here as unit backup rolls) in the form of a regular backup roll divided into multiple pieces in the roll body length direction, and this unit backup roll is Since the length is short, the roll diameter can be made small, and each unit backup roll is equipped with an elastic member as a suppressing means to press it toward the wiping roll, and the pressing force at the center of the backup roll row is reduced. The idea was to wipe the rolling oil evenly in the width direction of the metal strip and evenly over the entire surface by adjusting it strongly and weakly at both ends. However, since the pressing force generated by such an elastic member is proportional to the amount of displacement applied to the elastic member, for example, when using a spring as the elastic member, it is necessary to prepare springs with different spring constants in stages. Therefore, it is necessary to prepare a large number of springs with a spring constant that generates a different appropriate pressing force at each predetermined position in the width direction of the wiping roll. Even if a large number of springs are prepared, if the pressing force at a certain position in the width direction of the wiping roll is not optimal, it is difficult to appropriately adjust the pressing force at that position each time.
Even if it were possible to adjust it, it would be practically difficult to readjust the pressing force of each unit backup roll without stopping the operation, and furthermore, it would be difficult to readjust the pressing force of each unit backup roll without stopping the operation. Even if the pressing force could be adjusted to just the right amount, there was a drawback that the rolling oil could not be removed evenly when wiping was performed under different conditions in that state. Therefore, accidents due to poor wiping, and quality deterioration due to poor shape of the coil, especially when the cold-rolled metal strip is thin and coiled without using a mount, continued to occur.

[Problem to be solved by the invention]

The present invention eliminates the drawbacks of the prior art and allows the pressing force of each unit backup roll to be arbitrarily selected from a continuous variation, thereby ensuring that the metal strip remains adhered to the surface of the metal strip during wiping under any conditions. In order to achieve the best wiping of the rolling oil evenly over the entire width and evenly over the entire surface, the pressing force of each unit backup roll against the wiping roll can be appropriately generated according to its position in the width direction of the wiping roll. The objective is to configure a roll wiper that can be adjusted to [Means for Solving the Problem] As a result of various studies, the inventors of the present invention have developed a method in which a cylindrical body is rotatably attached to the outer periphery of an eccentric sleeve whose rotational angle position is adjustable and which is fitted onto and fixed to the backup roll shaft. By configuring each unit backup roll, the fixed position of the eccentric sleeve can be changed by rotation, so that the length from the axis of the backup roll shaft to the circumferential edge of the cylindrical body, which is the point of application of the pressing force, can be adjusted arbitrarily and continuously. It has been found that the above problem can be solved by making it possible to arbitrarily form a pattern of application points in which the application point positions of each unit backup roll are connected in the roll width direction. The present invention was completed.

Hereinafter, the roll wiper according to the present invention will be explained in detail with reference to the drawings. FIG. 1 is an overall schematic front view of an example of a roll wiper according to the present invention, FIG. 2 is an explanatory side view showing the roll arrangement of FIG. 1, and FIG. 3 is a structure of an example of a unit backup roll ( A) is a front cross-sectional view, (opening) is a cross-sectional view taken along the line A-A in (A), Fig. 4 is an explanatory diagram of the relationship between the rotation angle position of the eccentric sleeve and the distance between the points of action, and Fig. 5 is a backup A front explanatory view showing an example of a state in which the position of the point of action of each unit backup roll changes in the row direction of the roll row, FIG. 6 (A),
(A) and (C) are explanatory diagrams of the relationship between the distance between the backup roll axis and the point of action and the rotational angular position of the eccentric sleeve. Fig. 7 (A), (A) and (C) are different An explanatory diagram of a combination example when an eccentric sleeve with an eccentric amount is used,
FIGS. 8A and 8B are explanatory side views showing an example of a roll arrangement other than that shown in FIG. 2 in a roll wiper according to the present invention. As an example of the roll wiper according to the present invention is shown in FIG. 1 and FIG. A pair of wiping rolls 5 arranged in
At least one row (one row in Figures 2 and 8 (a), two rows in Figure 8 (opening)) arranged in the rear direction for each row of a plurality of short units of length. A backup roll row 8 in which backup rolls 6 are linearly arranged on a backup roll shaft 7 is attached directly to a roll chock or roll frame and indirectly to a frame 9.
Pressing means 10, such as the illustrated hydraulic cylinder or electric screw, press the backup roll row 8 toward the wiping roll 5 at both ends thereof. 10'
It is almost the same as the conventional technology. As for the roll arrangement in the present invention, the backup roll row 8 may be arranged so as to directly press the wiping roll 5 as shown in FIG.
If the wiping roll 5 is arranged so as to be indirectly pressed through the intermediate roll 11 installed between the wiping roll 5 and the backup roll row 8 as shown in FIG.
This is preferable because it reduces the possibility that marks (difference in gloss) from the unit backup roll 6 will be left on the unit backup roll 6. The wiping roll 5 and intermediate roll l1 are mounted so as to be rotatable while receiving radial load and thrust load by a wiping roll chock 5a and an intermediate roll chock 11a each having a built-in bearing. Axis 7 is backup roll frame 8a
It can either be completely fixed to the shaft, or it can be attached so that only the shaft rotation angle position can be adjusted as explained later. This backup roll shaft 7 is connected to a suppressing means 10. which is connected to a pack-up roll frame 8a. 10' moves vertically within the frame 9 along with the movement of the backup roll frame 8a. An important feature of the present invention is that the axis 01 of the pack-up roll shaft 7 of the unit backup roll 6 and the unit pack-up roll 6 are aligned with the intermediate roll 11 or the wiping roll 5 (if the intermediate roll 11 is not installed). ) to which the pressing force is applied (referred to as the point of application in the present invention). The mechanism consists in making it possible to arbitrarily adjust the distance to produce optimal suppression by appropriately selecting the distance. That is, each unit backup roll 6 includes a fixed backup roll shaft 7 as shown in FIG. 3, an eccentric sleeve 12 whose rotational angle position is adjustable and which is fitted onto and fixed to the backup roll shaft 7, and this eccentric sleeve. 12
It mainly consists of a cylindrical body 13 rotatably mounted on the outer periphery of the cylinder. this. The eccentric sleeve 12 preferably has the following structure in order to facilitate attachment to the backup roll shaft 7 and adjustment of the rotational angle position. In other words, Figure 3 (a)
As shown in the figure, it consists of a cylindrical inner sleeve 12a with a uniform wall thickness and an outer sleeve 12b, which is the outer part of the inner sleeve 12a. The inner sleeve 1 is eccentric.
2g is fixed to the backup roll shaft 7 with a key 12c, and an outer sleeve 12b is attached to the outside of the key 12c.
2d (therefore, eccentric sleeve 1
2 is entirely fixed to the pack-up roll shaft 7). A bearing structure is used to rotatably attach the cylindrical body 13 to the outer periphery of the eccentric sleeve 12, but since a large load is applied to the unit backup roll 6 in the radial direction, a cylindrical double bearing structure is preferable. In the example shown in FIG. 3, the inner race 14 is attached to the outer sleeve 12 of the eccentric sleeve 12.
In order to increase the load capacity, cylindrical rollers 15 are arranged in two rows, and a cylindrical body 13 as a outer race is attached to the outer side of the rollers 15. In addition to the example illustrated above, a ready-made roller bearing may be used and the cylindrical body 13 may be attached to its outer race. Cylindrical body 1 of unit backup roll 6 having such structure
3 is an eccentric sleeve as shown in Figure 3 (opening)? The eccentric sleeve 12 rotates around the axis 01 of a temporary hollow cylindrical body whose outer circumferential surface is the outer circumferential surface of the eccentric sleeve 12 (hereinafter simply referred to as the axis of the eccentric sleeve 12). The backup roll shaft 7 of this backup roll 6 is fixed at a predetermined position by a backup roll frame 8a that moves up and down within the frame 9, and since the eccentric sleeve 12 is also fixed to the backup roll shaft 7, the axis center is 0. (2) is also fixed in position, so the cylindrical body 13 rotates without any eccentric movement. Therefore, if the position of the point of action P is determined on the outer circumference of the cylinder 13 as shown in FIG. 4, the position of the point of action P will not change even if the cylinder 13 rotates, so the axis The distance to P, that is, the distance between the points of action Q, is constant. The distance lIaQ between the points of action is determined by the positional relationship between the eccentric sleeve 12 and the point of action P, that is, if Q is the intersection of the straight line connecting the axis 08 and the point of action P with the outer periphery of the eccentric sleeve 12 as shown in FIG. The intersection point Q differs depending on which point on the outer periphery of the eccentric sleeve 12 is positioned to fix the eccentric sleeve 12 to the backup roll shaft 7. Fourth now?
As shown in the figure, of the two points where the straight line IIAL connecting the axis O■ of the backup roll shaft 7 and the axis 02 of the eccentric sleeve 12 intersects the outer periphery of the eccentric sleeve 12, the axis 01 side of the backup roll shaft 7 is R1, and the axis 02 side of the eccentric sleeve 12 is R2, and by rotating the straight line 0R2 clockwise and in the opposite direction from the position where it overlaps with 02P, a certain point on the outer periphery of the eccentric sleeve 12 is brought to the above Q position. The rotation angle θ when the eccentric sleeve 12 is positioned indicates the positional relationship between the eccentric sleeve 12 and the point of action P (this is referred to as the rotation angle position of the eccentric sleeve 12). The distance between the points of action Ω is the 6th
As shown in Figures (A), (C), and (C), when the rotation angle θ is 0° (RX is at the position of Q ffi!), the maximum value ρ. From there, as the rotation angle θ increases, the distance between the points of action @Q becomes smaller, and when the rotation angle θ is 180° (the position where Rx is Q), the distance between the points of action 111Q becomes the minimum value Q2. Furthermore, as the rotation angle θ increases, the distance between the points of action Ω gradually increases, following the reverse of the above. By selecting the rotation angle θ in this manner, the distance between the points of action can be set to an arbitrary length between the maximum value ρ1 and the minimum value Q. Adjustment of the rotation angle position of the eccentric sleeve 12 is as follows:
In the case of the unit backup roll 6 shown in FIG. 3, the sleeve stopper 12d is removed, the rotation of the outer sleeve 12b is adjusted in advance, and then it is fixed again with the sleeve stopper 12d. A plurality of such unit backup rolls 6 are arranged linearly in the roll trunk length direction to constitute a backup roll row 8. This arrangement is usually carried out by attaching one long backup roll shaft 7 in common, as shown in FIG. 5, but in other embodiments, for example, each unit backup roll 6 is attached to a small frame. These small frames are attached to each independent backup roll shaft and arranged in a straight line with long frames fixed in the width direction (#4 not shown), and each unit backup roll 6 can be independently and freely arranged. Eccentric sleeve 1
It may also be possible to adjust the rotational angle position in step 2, that is, the distance Ω between the points of action. Such a point of action pattern of the backup roll row 8, that is, each unit pack up row? In general, it is appropriate for the distribution of the distance Ω between the points of action 6 in the roll row direction (width direction of the metal strip) to have a parabolic pattern with the center protruding toward the wiping roll 5 side, as shown in FIG. be. The details of the application point pattern are selected according to the wiping conditions at the location. Each of the unit backup rolls 6 constituting such a backup roll row 8 does not necessarily have the same eccentricity (distance between 010■), and the action at the position arranged in the backup roll row 8 As long as the adjustment range of the point-to-point distance 2 is adjustable, some or all of the unit backup rolls 6 may have different eccentricities as shown in FIG. It may be the same thing. The reason is that the distance between the points of action is Jll for each unit backup roll 6! This is because Q can still be adjusted to any value. In the present invention, wiping in the same operation is achieved by rotating the entire eccentric sleeve 12 by a small angle while keeping the rotational angular positional relationship of the eccentric sleeve 12 between the unit backup rolls 6, which have previously formed a certain application point pattern, unchanged. In order to make it easier to correct the condition or adjust to new wiping conditions, the backup roll axis 7
It is preferable to use one long roll shaft, fix the shaft rotation angle position so as to be adjustable, and configure the shaft end to be rotatable by minute angles by a transmission device such as a gear. The manner of fixing this backup roll shaft 7 is as follows:
An easy way to do this is to make the fixation level a little weaker and use strong power to rotate it when necessary, or, for example, to completely fix it by tightening it, but when necessary, loosen it, rotate it, adjust it, and then fix it back to its original state. It shows the structure etc.
[Operation] Once the application point pattern of the backup roll of the roll wiper used under a certain wiping condition is set, the distance g between the application points of each unit backup roll 6 is adjusted accordingly. This is done by adjusting the rotation angle θ of the eccentric sleeve 12 as described above, but since this rotation angle θ can be changed continuously, it can be adjusted to any rotation angle θ, so that each The distance Ω between the points of action of each unit backup roll 6 can be set to the optimum length. Even if such a pack-up roll row 8 is strongly pressed against the wiping roll 5 or the intermediate roll 1l by the pressing means 10, there is no problem since each unit backup roll 6 does not have a deformable material such as an elastic body. Since the body 13 has a rotatable structure, it rotates with respect to the running of the metal band S without slipping. In addition, when a common long roll shaft is used as the backup roll shaft 7, the rotation angle positional relationship of the eccentric sleeves 12 between the unit backup rolls 6 forming a certain application point pattern can be maintained as is. By slightly rotating this backup roll shaft 7, the application point pattern can also be slightly changed. [Effects of the Invention] The roll wiper according to the present invention described in detail above includes each unit backup roll constituting the backup roll row with a cylindrical body rotatably attached to the outside of an eccentric sleeve, and the eccentric sleeve is rotated at a rotation angle. By making the structure adjustable in position, the following effects can be obtained, and its industrial value is extremely large. (b) Since any shape of the application point pattern can be formed as set, it is possible to adjust the pressing force on the wiping roll to suit the wiping conditions exactly. (mouth) The pressing force can be finely adjusted even during operation. (c) Since a high pressing force can be generated, slippage between the wiping roll and the metal strip can be prevented. (2) Therefore, wiping of rolling oil can be carried out evenly and efficiently in the width direction of the metal strip and over the entire surface without causing surface flaws on the metal strip or deforming both ends. do not have.

[Brief explanation of drawings]

FIG. 1 is an overall schematic front view of an example of a roll wiper according to the present invention, FIG. 2 is an explanatory side view showing the roll arrangement of FIG. 1, and FIG. 3 is a structure of an example of a unit backup roll ( A) is a front cross-sectional view, (opening) is a cross-sectional view taken along line A-A in (A), Fig. 4 is an explanatory diagram of the relationship between the rotation angle position of the eccentric sleeve and the distance between the points of action, and Fig. 5 is a backup A front explanatory view showing an example of a state in which the position of the point of action of each unit backup roll changes in the row direction of the roll row, FIG. 6 (A),
(A) and (C) are explanatory diagrams of the relationship between the distance between the backup roll axis and the point of action and the rotational angular position of the eccentric sleeve. Fig. 7 (A), (A) and (C) are different An explanatory diagram of a combination example when an eccentric sleeve with an eccentric amount is used,
FIGS. 8A and 8B are explanatory side views showing an example of a roll arrangement other than that shown in FIG. 2 in the roll wiper according to the present invention, and FIG. 9 is an explanatory view of one example of the rolling process. In the drawings 1, 1'...Reel 2...Deflector roll 3...Mill body 3a...Rolling roll 3b...Rolling oil injection nozzle 4.4'...Wiping Device 5... Wiping roll 5a... Wiping roll chock 6... Unit backup roll 7... Backup roll shaft 8... Backup roll row 8a... Backup roll frame 9... ...Frame 10. 10'... Pressing means l1... Intermediate roll 11a... Intermediate roll chock 12... Eccentric sleeve 12a... Inner sleeve 12b... Outer sleeve 12c... Key 12d ... Sleeve stopper 13 ... Cylindrical body l4 ... Inner race 15 ... Cylindrical roller L ... Straight line a connecting the axis of the backup roll shaft and the axis of the eccentric sleeve. ... Distance between points of action Q0 ... Maximum value of distance between points of action Q2 ... Minimum value of distance between points of action Oe ... Meticulousness of backup roll axis 0, ...
Axial center of eccentric sleeve

Claims (1)

[Claims] 1. A pair of wiping rolls (5) disposed above and below the passageway of the cold-rolled metal strip (S), and a pair of wiping rolls (5) disposed behind each of the wiping rolls (5). At least one short length unit backup roll for each column (
6) is arranged in a straight line, and the backup roll row (8) is connected to the wiping roll (8).
5) in a roll wiper equipped with a pressing means (10) for pressing toward each unit backup roll (6)
includes a backup roll shaft (7), an eccentric sleeve (12) whose rotational angle position is adjustable and which is fitted onto and fixed to the backup roll shaft (7), and a cylindrical body rotatably mounted on the outer periphery of the eccentric sleeve. (13) A roll wiper mainly consisting of. 2. The roll wiper according to claim 1, wherein at least some of the unit backup rolls (6) constituting the backup roll row (8) have eccentric sleeves (12) having the same eccentricity. 3. Claim 1, wherein at least some of the unit backup rolls (6) constituting the backup roll row (8) have different eccentricity amounts of their eccentric sleeves (12).
Roll wiper described in. 4 The unit backup rolls (6) constituting one backup roll row (8) are connected to the backup roll axis (7
4. The roll wiper according to claim 1, wherein the roll wiper has one long backup roll shaft in common. 5. The roll wiper according to claim 4, wherein the one long backup roll shaft (7) is fixed such that the shaft rotation angle position can be adjusted. 6. The roll wiper according to any one of claims 1 to 5, wherein one row of backup roll rows (8) is installed so as to be in direct contact with each wiping roll (5). 7. The roll wiper according to claim 1, wherein two backup roll rows (8) are installed in direct contact with each wiping roll (5). 8 Wiping roll (5) and backup roll row (
8) A roll wiper according to any one of claims 1 to 7, wherein an intermediate roll (11) is installed between the roll wiper and the roll wiper.