JP2007160369A - Wiping device of multistage rolling mill, and its operation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiping device of a multistage rolling mill, which wiping device does not cause slip scratches on rolled materials even when a rolling speed is changed, and does not move the rolled materials zigzag by the trouble of wiping rolls, and does not lower a wiping effect by damaging the edge pass portion of the rolled material, and further to provide its operation method. <P>SOLUTION: The wiping device of the multistage rolling mill wipes off and removes the rolling oil existing on a rolled material 1 after rolling the rolled material 1 while supplying the rolling oil thereon. Pinch roller type second wiping devices 6, 6a, which are composed of a pair of rollers 7, 7a arranged so as to oppose to the upper and lower surfaces of the rolled material 1, are arranged between the multistage rolling mill 4 and first wiping devices 5, 5a. In addition, a pair of the rollers 7, 7a of the second wiping devices 6, 6a are configured so as to have a double layer structure having an inner layer made of small inertia material and a metallic outer cylinder for covering the outside periphery of the inner layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiping apparatus for a multi-stage rolling mill and a method for operating the wiping apparatus that winds the rolled material while removing the rolled oil on the rolled material after applying the rolling oil to a rolled material such as a cold rolled rope.

  When rolling a rolled material such as a steel strip, rolling oil is supplied to the roll bite portion. And since a part of this rolling oil remains adhering to the steel strip surface, if the steel strip is wound up as it is, a skid will occur in the steel strip. Moreover, since the said rolling oil remains attached and is not collect | recovered, it becomes a factor which worsens the basic unit of rolling oil.

  For this reason, a wiping device for wiping and removing rolling oil and cooling water adhering to the steel strip surface is usually provided on the entry / exit side of the reverse rolling mill and the exit side of the tandem rolling mill. Examples of the wiping device generally used include a roll type wiping device and a pad type wiping device.

  The roll-type wiping device presses the wiping rolls provided opposite to the upper and lower sides of the steel strip to be conveyed against the surface of the steel strip to sandwich the steel strip, and the upper and lower wiping rolls according to the rolling speed of the steel strip. Is used to wipe off the rolling oil and the like on the surface of the steel strip.

  Such a roll-type wiping means according to a conventional example will be described with reference to FIG. 7 which is an explanatory view showing an outline of a so-called roll leveler type wiper. The roll leveler type wiper 35 according to the conventional example includes a single metal small-diameter roll 32 brought into contact with the lower surface of the rolled steel strip 31, and two metal small-diameter rolls brought into contact with the upper surface of the rolled steel strip 31. 33, 34 are arranged in a zigzag pattern in the longitudinal direction of the rolled steel strip 31, and include backup rolls 32a, 33a, 34a for preventing deformation of the rolls 32, 33, 34 (see Patent Document 1). ).

  In the roll leveler type wiper 35, when the thickness of the steel strip 31 is reduced, the tension applied to the steel strip 31 is reduced, so that the contact pressure on the roll surface is reduced and the wiping performance is deteriorated. Slip occurs between 32, 33, 34 and the steel strip 31, and scratches occur on both. In order to maintain a good wiping state, it is necessary to limit the steel strip rolling speed.

  In addition, the pad type wiping means wipes off the rolling oil adhering to the steel strip surface while rubbing the pad, so it is easier to scratch the steel strip than the roll type, and is used for steel strips with strict surface quality. There is a problem that you can not.

A conventional wiping means proposed to improve the problems of the roll type and pad type will be described below with reference to FIG. 8 which is a schematic diagram showing the embodiment. In this wiping method, a roll leveler type wiper 45 and a pinch roll type wiper 47 are arranged in series in a cold rolling line, and a rolled steel strip 41 having a thickness of 1 mm or more is passed through the roll leveler type wiper 45. The rolled steel strip 41 having a thickness of less than 1 mm is a rolling oil wiping method in the rolled steel strip 41 that is passed through the pinch roll type wiper 47 (see Patent Document 2).
Japanese Patent Laid-Open No. 61-140318 Japanese Patent Laid-Open No. 5-76992

  According to the wiping method according to the conventional example, since the roll leveler type wiper 45 and the pinch roll type wiper 47 are arranged in series, the rolled steel strip 41 having a thickness of 1 mm or more passes through the roll leveler type wiper 45. It is described that a rolled steel strip having a thickness of less than 1 mm is passed through the pinch roll type wiper 47 so that the rolling steel strip 41 of all thicknesses can be rolled at high speed and good wiping can be achieved. .

However, in the pinch roll type wiper 47, in order to wipe the rolling oil by sandwiching the rolled material between the rolls, the contact between the rolled material and the roll cannot be avoided, and slip scratches occur, It has the following problems.
(1) Generation of slip damage on rolled material and roller surface during acceleration / deceleration (2) Generation of meandering of rolled material due to occurrence of axial linear pressure difference of resin-based roll (3) Decrease in wiping effect due to damage of resin-based roll through edge of rolled material

  The above three problems will be described in detail below. First, the problem of item (1) is that when the rolling material rolling speed is increased or decreased during rolling, the pinch roll does not follow the rolling material speed and slip occurs, causing slip scratches on the rolling material and the roller surface. It is a problem. Such a scratched steel strip may itself be a defective product, or may not be plated with a scratched portion during secondary processing, and may become a defect. In addition, if the scratches given to the roller surface are large, it is transferred to the steel strip during rolling and causes similar quality problems.

  Further, a resin roller is often used as the pinch roll type wiper roller. The purpose of adopting such a resin-based roller is to reduce the change in the friction coefficient of the roller surface before and after the application of rolling oil, or to form a porous resin roller to evacuate the roller and remove the rolling oil by suction. However, it has the following problems. That is, as a problem of the item (2), a roll diameter difference is generated in the axial direction due to swelling and wear, resulting in an axial linear pressure difference between the two rolls.

  Furthermore, this resin-based roll has the problem of the item (3) that when the width of the rolled material is narrow, the oil film at that portion becomes thick due to damage at the edge passing portion, and the wiping effect at the finish wiper is obtained. There is a problem that decreases.

  Therefore, the object of the present invention is to prevent the rolling material from slipping even if the rolling speed is increased or decreased, and to cause the rolling material to meander due to a failure of the wiping roll, or to damage the rolling material edge passing portion. An object of the present invention is to provide a wiping apparatus for a multi-high rolling mill and an operation method thereof without reducing the effect.

  In order to achieve the above object, the means employed by the wiping device of the multi-high rolling mill according to claim 1 of the present invention is to remove the rolling oil on the rolled material after rolling the rolled material while applying the rolling oil. A wiping device for a multi-high rolling mill that winds while rolling, and a pair of rollers arranged between the multi-high rolling mill and the first wiping device for removing rolling oil so as to be opposed to each other above and below the rolled material. A pinch roller type second wiping device is provided, and the pair of rollers of the second wiping device has a multilayer structure including an inner layer made of a low inertia material and a metal outer cylinder covering the outer periphery thereof. It is characterized by.

  The means employed by the wiping device of the multi-high rolling mill according to claim 2 of the present invention is the wiping device of the multi-high rolling mill according to claim 1, wherein the second wiping device controls the pressure between the rolling material and the roller. A roller pressure adjusting means for adjusting is provided.

  The means employed by the wiping device of the multi-high rolling mill according to claim 3 of the present invention is the low-inertia material constituting the roller of the second wiping device in the wiping device of the multi-high rolling mill according to claim 1 or 2. Is a fiber-reinforced composite material.

According to the operation method of the wiping device of the multi-high rolling mill according to claim 4 of the present invention, in the operation method of the wiping device of the multi-high rolling mill according to claim 2, the roller pressure adjusting means obtains from the Hertz formula. The maximum roller contact surface pressure P _m [MPa] of the following formula (1) is adjusted so as to be 10 MPa or less.
P _m = 4.099 × √ {qE (r ₁ + r ₂ ) / r ₁ r ₂ } (1)
Where q: linear load per unit length of roller [kgf / mm],
E: Longitudinal elastic modulus of the roller [kgf / mm ² ],
r ₁ , r ₂ : radius of each pinch roller [mm]

  According to the wiping device for a multi-high rolling mill according to claim 1 of the present invention, after rolling the rolled material while applying the rolling oil, the wiping device for the multi-high rolling mill that winds up while removing the rolling oil on the rolled material. A second wiping device comprising a pair of rollers arranged vertically opposite to the rolled material is provided between the multi-high rolling mill and a first wiping device for removing rolling oil. It is.

  At the same time, since the roller of the second wiping device has a multi-layer structure having an inner layer made of a low inertia material and a metal outer cylinder covering the outer periphery thereof, the followability to the rolling speed is improved and the slip of the rolled material is improved. Scratch generation can be reduced. In addition, the meandering of the rolled material due to the occurrence of the axial linear pressure difference, which is a drawback of the resin roller, can be prevented. Furthermore, it is possible to prevent damage to the rolling material edge passing portion and to prevent a reduction in the wiping effect.

  On the other hand, according to the wiping device of the multi-high rolling mill according to claim 2 of the present invention, the second wiping device includes roller pressure adjusting means for adjusting the pressure between the rolling material and the roller. By adjusting the gap between the roller and the rolled material so as to be in a fluid lubrication state by the pressure adjusting means, there is no risk of scratching the rolled material.

  Further, according to the wiping device of the multi-high rolling mill according to claim 3 of the present invention, since the low inertia material constituting the roller of the second wiping device is a fiber reinforced composite material, it depends on the physical characteristics of the reinforced fiber. Further, it is possible to prevent the occurrence of the axial linear pressure difference accompanying the expansion and wear of the roller, which is a drawback of the resin-based roller. In addition, since the outer layer of the roller has a multi-layered structure made of a metal outer cylinder, it is possible to prevent the roller surface from being damaged by passing through the rolled material edge.

According to the operation method of the wiping device of the multi-high rolling mill according to claim 4 of the present invention, the maximum roller contact surface pressure P _m [MPa] of the following expression (1) obtained from the Hertz formula by the roller pressure adjusting means. However, since it is adjusted and operated so as to be 10 MPa or less, the rolling material and the roller are maintained in a fluid-lubricated state in which an oil film is interposed, and there is no possibility of causing roller contact damage to the rolling material.
P _m = 4.099 × √ {qE (r ₁ + r ₂ ) / r ₁ r ₂ } (1)
Where q: linear load per unit length of roller [kgf / mm],
E: Longitudinal elastic modulus of the roller [kgf / mm ² ],
r ₁ , r ₂ : radius of each pinch roller [mm]

  First, the outline | summary of the wiping apparatus of the multistage rolling mill which concerns on Embodiment 1 of this invention is demonstrated below using FIG. 1 which is the whole block diagram of rolling equipment.

  FIG. 1 shows the overall configuration of a reverse multi-high rolling mill capable of transporting the rolled material 1 in either the left or right direction in the drawing, and reference numeral 4 denotes the multi-high rolling mill. That is, when the rolled material 1 is unwound from the take-up reel 3a and conveyed rightward in the drawing and rolled while being taken up by the take-up reel 3, it is introduced into the multi-stage rolling mill 4 via the deflector roll 2a. Then, the rolling process is performed while the rolling oil is applied.

  Then, the rolling oil adhering to the rolled material 1 is removed as a pretreatment by the second wiping device 6, and the rolling oil remaining on the rolled material 1 is further removed by the first wiping device 5. Is done. At this time, the rolling oil removing means such as the rollers of the first wiping device 5a and the second wiping device 6a upstream of the multi-high rolling mill 4 avoids contact with the rolling material 1 and rolls as described later. The material 1 is adjusted so as not to have any action.

  Conversely, when the rolled material 1 is unwound from the take-up reel 3 and rolled while being conveyed in the left direction in the drawing by the take-up reel 3a, it is rolled by the multi-stage rolling mill 4 via the deflector roll 2. After being rolled with oil, the rolling oil adhering to the rolled material 1 is removed as a pretreatment by the second wiping device 6a, and the rolling remaining on the rolled material 1 is further removed by the first wiping device 5a. Oil is fully removed.

  At this time, the rolling oil removing means such as the rollers of the first wiping device 5 and the second wiping device 6 on the upstream side of the multi-high rolling mill 4 avoids contact with the rolled material 1 in the same manner as described above. It is adjusted so as not to have any effect on 1. For the first wiping devices 5 and 5a, a roll leveler type wiper or a pad type wiper for removing the rolling oil applied to the rolled material 1 in earnest can be used.

  On the other hand, the second wiping devices 6 and 6a are located between the multi-high rolling mill 4, the first wiping device 5, the multi-high rolling mill 4 and the first wiping device 5a, respectively. The pinch roller type wiping device is preferably composed of a pair of rollers 7 and 7a disposed opposite to each other.

  The second wiping devices 6 and 6a complement the rolling oil removing function as a pretreatment of the first wiping devices 5 and 5a. Accordingly, it is an object to reduce the burden on the first wiping devices 5 and 5a and improve the oil draining effect.

  That is, when the second wiping devices 6 and 6a are not provided, the rolling oil remaining on the rolled material must be removed only by the first wiping devices 5 and 5a. The first wiping device The burden on 5 and 5a becomes very large, and the rolling oil that could not be removed remains on the rolled material.

  On the other hand, if the rolling oil can be roughly removed by the second wiping devices 6 and 6a, not only the burden on the first wiping devices 5 and 5a is reduced, but the rolling oil is not completely removed. Can be solved on the rolled material 1.

  In the case of the reverse rolling mill shown in FIG. 1, the first wiping devices 5 and 5a and the second wiping devices 6 and 6a are provided on both sides of the multi-stage rolling mill 4 for bidirectional rolling. However, in the case of the wiping device of the multi-high rolling mill 4 for only one-way rolling, it is sufficient to provide only the wiping device on the downstream side of the multi-high rolling mill 4 in the rolling material transport direction.

  Next, about the wiping apparatus of the multi-high rolling mill according to Embodiment 1 of the present invention and the operation method thereof, FIG. 2 showing a schematic vertical section of the pinch roller type wiping apparatus, and a schematic view taken along line AA in FIG. This will be described below with reference to FIG.

  This pinch roller type wiping device 10 has a pair of rollers 11 arranged facing the upper and lower sides of the rolled material 1, and the rollers 11 are upper rollers 11 a and lower rollers 11 b which are free rollers having no driving source. It consists of The lower roller 11a is fixed to the lower frame 12b via a bearing 13b.

  The lower frame 12b is configured so that the shaft 14 attached to the gantry 16 can slide up and down, and the shaft 14 is arranged so that the roller surface of the lower roller 11b is slightly lower than the pass line of the rolled material. It is fixed by the attached stopper 15b.

  On the other hand, the upper roller 11a is attached to the bearing 13a, and is fixed to the upper frame 12a via a roller pressure adjusting means 17a described later. Similarly to the lower frame 12b, the upper frame 12a is configured to be able to slide the shaft 14 up and down, and is fixed to an appropriate height by a stopper 15a.

  The upper frame 12a may be lifted above the height positioned by the stopper 15a by its own weight by the roller opening / closing means 17b having one end fixed to the lower frame 12b and the other end fixed to the upper frame 12a. It is configured as possible.

  Further, one end of roller pressure adjusting means 17a is fixed to the upper frame 12a, and the other end of the roller pressure adjusting means 17a is fixed to the bearing 13a of the upper roller 11a. A hydraulic cylinder or an air cylinder can be applied to the roller opening / closing means 17b and the roller pressure adjusting means 17a.

  That is, by lifting the upper frame 12a by the roller opening / closing means 17b, the roller between the upper roller 11a and the lower roller 11b can be opened and closed. When the roller opening / closing means 17b is opened, the upper roller 11a is lifted, and the upper and lower rollers 11a and 11b are retracted from the pass line and do not contact the rolled material 1. When the rolled material 1 is passed through or the wiping device 10 is not used, such an open state is set. At the time of wiping, the upper and lower rollers 11a and 11b are closed before starting rolling.

And the operating method of the wiping apparatus 10 of the multi-high rolling mill according to the present invention is such that the maximum roller contact surface pressure P _m [MPa] of the following formula (1) obtained from the Hertz formula by the roller pressure adjusting means 17a. However, it is preferable to adjust and operate so as to be 10 MPa or less. If the maximum roller contact surface pressure P _m or less 10 MPa, rolled material and the roller are held in interposed fluid lubrication state of the oil film, because fear of generating roller contact scratches on the rolled material is eliminated.

P _m = 4.099 × √ {qE (r ₁ + r ₂ ) / r ₁ r ₂ } (1)
Where q: linear load per unit length of roller [kgf / mm],
E: Longitudinal elastic modulus of the roller [kgf / mm ² ],
r ₁ , r ₂ : radius of each pinch roller [mm]
In the above formula (1), the symbol √ indicates the square root of the formula in parentheses indicated by {}. The value of q can be obtained by converting from the working pressure of the fluid that drives the roller pressure adjusting means 17a.

  Next, the action of fluid lubrication will be described below with reference to FIG. 4, which is a conceptual diagram showing the X half upper surface of FIG. 3 in an enlarged manner. FIG. 4 shows only the upper half surface from the center of the thickness of the rolled material 1 indicated by the alternate long and short dash line, and shows a fluid lubrication state in which an oil film 20 is formed between the rolled material 1 and the upper roller 11a. ing.

That is, now, assuming that the roller surface roughness is Ra ₁ and the rolled material surface roughness is Ra ₂ , the following equation (2) is established between the oil film thickness D formed by the rolled material 1 and the upper roller 11a. The relationship is established.
D> Ra ₁ + Ra ₂ (2)

In such a fluid lubrication state, since the oil film thickness D is larger than the sum of the roller surface roughness Ra ₁ and the rolled material surface roughness Ra ₂ , the upper roller 11 a contacts the rolled material 1 and is damaged. There is nothing. Similarly, since the relationship of the formula (2) is established between the lower roller 11b and the rolled material 1, the lower roller 11b does not come into contact with the rolled material 1 to be damaged.

  In this case, the rollers 11a and 11b are multi-layers composed of an inner layer S2 made of a low inertia material and a metal outer cylinder S1 covering the outer periphery thereof as shown in FIG. 5 which is a schematic sectional view showing a roller section. What consists of a structure is preferable. Further, the low inertia material is preferably a fiber reinforced composite material in which reinforcing fibers such as carbon fibers and glass fibers are bonded with a resin.

  Incidentally, since the metal roller used for a normal rolling apparatus is comprised from metals, such as hollow carbon steel, in the center part, it becomes a great weight. As a result, since inertia increases, it has the fault that it cannot follow the change of rolling speed.

  On the other hand, the resin roller has a two-layer structure in which S1 is a resin outer cylinder and S2 is made of a metal such as carbon steel. However, since the shaft portion (not shown) also uses a metal such as carbon steel, a considerable weight is required. It will have. As a result, like the metal roller, the inertia is increased as a result, and there is a drawback that it cannot follow the change in rolling speed.

  As described above, the wiping device for a multi-high rolling mill according to the present invention has a multi-layer structure in which the roller is composed of an inner layer S2 made of a low inertia material and a metal outer cylinder S1 covering the outer periphery thereof. The weight of the roller can be reduced, and as a result, a change in the rolling speed of the rolled material can be followed by employing a low inertia roller configuration.

  Next, about the wiping device of the multi-high rolling mill according to Embodiment 2 of the present invention, the overall configuration diagram showing that the arrangement of the clipping roller attached to the multi-high rolling mill is changed and diverted as the second wiping device This will be described below with reference to FIG. Note that the second embodiment of the present invention differs from the first embodiment in that the second wiping device is not an independent device as shown in FIG. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and different points will be described below.

  That is, the wiping device of the multi-high rolling mill according to Embodiment 2 of the present invention changes the roller arrangement of the clipping roller 21 for removing wrinkles of the rolled material attached to the multi-high rolling mill 4 shown in FIG. And it is comprised as the pinch roller 11 which consists of a pair of upper and lower rollers 11a and 11b as shown in FIG.6 (b).

  Further, as described with reference to FIGS. 2 and 3, roller opening / closing means for opening / closing the upper and lower rollers 11a, 11b, and roller pressure adjusting means for adjusting the contact surface pressure between the upper and lower rollers 11a, 11b. Can be attached to the multi-high rolling mill 4.

  And while changing the rolling material 1 conveyance direction to the right direction like FIG.6 (b) from the original drawing left direction shown to Fig.6 (a), the 1st wiping apparatus 5a is a multistage rolling mill. 4 is rearranged on the downstream side.

  The pinch roller type | mold arrange | positioned facing the upper and lower sides of the said rolling material 1 between the rolling part of the said multi-high rolling mill 4, and the 1st wiping apparatus 5a which removes rolling oil by aiming at such correspondence. The second wiping device can be attached to the multi-stage rolling mill 4 and the wiping device and the operation method thereof according to the present invention can be implemented using an existing rolling device.

  As described above, according to the wiping device for a multi-high rolling mill and the operation method thereof according to the present invention, the rolled material is disposed so as to face the upper and lower sides between the multi-high rolling mill and the first wiping device for removing rolling oil. Since the second wiping device comprising a pair of rollers is provided, and the roller of the second wiping device has a multi-layer structure having an inner layer made of a low inertia material and a metal outer cylinder covering the outer periphery thereof, The followability to the rolling speed is improved, and the occurrence of slip damage on the rolled material can be mitigated.

  In addition, the low inertia material is made of a fiber reinforced material reinforced with carbon fiber, glass fiber, or the like, so that the inertia associated with the weight reduction of the roller can be reduced, and the outer diameter can be made by using a metal outer cylinder. Therefore, the meandering of the rolled material due to the occurrence of the axial linear pressure difference, which is a drawback of the resin-based roller, can be prevented.

In addition, since the second wiping device includes roller pressure adjusting means for adjusting the pressure between the rolling material and the roller, the maximum roller contact surface pressure of the above-described formula (1) is adjusted by the roller pressure adjusting means. by P _m is operated adjusted to less 10 MPa, rolled material and the roller are held in interposed fluid lubrication state of the oil film, there is no possibility of generating roller contact scratches on the rolled material.
<Example>

  Next, using the same rolling line as shown in FIG. 1, the rollers of the second wiping device are sequentially replaced with the multi-layered roller, the metal roller and the resin roller according to the present invention, and the following common conditions are satisfied. The test results of the rolling test of the rolled material will be described.

Common conditions -Rolling machine: Work roll drum length 650 mm 12-high rolling mill-Rolled material: Stainless steel with a thickness of 0.05 mm and a width of 550 mm-Rolling speed: 200 to 300 m / min.

  In the above test, the case where the roller according to the present invention in which the carbon fiber reinforced resin is configured as a low inertia material is used as the second wiping device roller is Embodiments 1 and 2, as the second wiping device roller. The case where a metal roller or a resin roller is used is referred to as Comparative Examples-1 to 4, and the results of confirming the presence or absence of scratches on the rolled material and the roller, the meandering of the rolled material, and the presence or absence of damage passing through the rolled material are shown. It is shown in 1.

Example -1 is the result of rolling test up roller contact pressure P _m calculated by the formula (1) as a fluid lubrication state of 8 MPa, examples -2 the maximum roller contact surface pressure P _m The result of a rolling test as a boundary lubrication state of 12 MPa is shown.

And, among these examples using the roller according to the present invention constructed of carbon fiber reinforced resin as a low inertia material, in the embodiment-1 up roller contact pressure P _m is below a fluid lubrication state 10MPa In all the evaluation items, no particular failure was observed. On the other hand, in Example-2 which was subjected to a rolling test as a boundary lubrication state of 10 MPa or more, occurrence of contact scratches on the rolled material due to metal contact between the roller and the rolled material was observed.

  Next, in Comparative Examples-1 and 2 using a metal roller, although the rolled material meandering due to the swelling of the roller and the rolling material edge passing damage due to insufficient surface hardness did not occur, regardless of the magnitude of the roller contact surface pressure Slip damage occurred on the surface of the rolled material. This is because the metal roller is heavy, resulting in an increase in inertia and failure to follow the transport conditions of the accelerated and decelerated rolled material.

  Furthermore, in Comparative Examples 3 and 4 using a resin roller, the linear pressure difference in the axial direction is generated due to swelling of the resin portion, resulting in meandering of the rolled material and edge passing damage due to the rolled material occurring on the roller surface. did.

  As described above, according to the wiping device for a multi-high rolling mill according to the present invention, the rolled material is disposed so as to face the upper and lower sides between the multi-high rolling mill and the first wiping device for removing rolling oil. Since the second wiping device comprising a pair of rollers is provided, and the roller of the second wiping device has a multi-layer structure having an inner layer made of a low inertia material and a metal outer cylinder covering the outer periphery thereof, The followability to the rolling speed is improved, and the occurrence of slip damage on the rolled material can be mitigated. In addition, the meandering of the rolled material due to the occurrence of the axial linear pressure difference, which is a drawback of the resin roller, can be prevented.

Further, according to the operation method of the second wiping device, since the wiping device includes the roller pressure adjusting means for adjusting the pressure between the rolling material and the roller, the roller pressure adjusting means allows the above-described formula ( by up roller contact pressure P _m obtained from 1) is operated to adjust such that the following 10 MPa, rolled material and the roller are held in interposed the like fluid lubrication state of the oil film, the roller contacts the rolled material There is no risk of scratching.

It is a whole lineblock diagram of rolling equipment for explaining an outline of a wiping device of a multi-high rolling mill concerning Embodiment 1 of the present invention. It is a typical standing cross section of the pinch roller type wiping apparatus for demonstrating the wiping apparatus of the multi-high rolling mill which concerns on Embodiment 1 of this invention, and its operating method. It is a typical cross-sectional view which shows the AA arrow of FIG. It is the conceptual diagram which expanded and showed the X half upper surface of FIG. It is sectional drawing which shows the roller cross section of the wiping apparatus of the multistage rolling mill which concerns on Embodiment 1 of this invention. In order to explain the wiping device for a multi-high rolling mill and its operating method according to Embodiment 2 of the present invention, the arrangement of the clipping roller attached to the multi-high rolling mill is changed and used as a second wiping device. FIG. It is explanatory drawing which shows the outline of the roll leveler type wiper which concerns on a prior art example. It is the schematic which shows the Example of the wiping means which concerns on a prior art example.

Explanation of symbols

S1 ... outer cylinder, S2 ... inner layer,
1 ... rolled material,
2, 2a ... deflector roll, 3, 3a ... take-up reel,
4 ... Multi-high rolling mill,
5, 5a ... first wiping device, 6, 6a, 10 ... second wiping device,
7, 7a ... Pinch roller,
11 ... Pinch roller, 11a ... Upper roller, 11b ... Lower roller,
12a ..., upper frame, 12b ... lower frame,
13a, 13b ... bearings, 14 ... shaft,
15a, 15b ... stopper, 16 ... mount,
17a ... roller pressure adjusting means,
17b: Roller opening / closing means,
20 ... oil film, 21 ... clipping roller

Claims (4)

  A wiping apparatus for a multi-high rolling mill that rolls a rolled material while rolling the rolling material and then removes the rolling oil on the rolled material, the first wiping removing the multi-high rolling mill and the rolling oil. A pinch roller type second wiping device comprising a pair of rollers arranged opposite to each other above and below the rolled material is provided between the device and the pair of rollers of the second wiping device has low inertia. A wiping apparatus for a multi-high rolling mill having a multi-layer structure having an inner layer made of a material and a metal outer cylinder covering an outer periphery thereof.   2. The wiping device for a multi-high rolling mill according to claim 1, wherein the second wiping device includes roller pressure adjusting means for adjusting a pressure between the rolling material and the roller.   The wiping device for a multi-stage rolling mill according to claim 1 or 2, wherein the low inertia material constituting the roller of the second wiping device is a fiber reinforced composite material. The operation is performed by adjusting the maximum roller contact surface pressure P _m [MPa] of the following formula (1) obtained from the Hertz formula by the roller pressure adjusting means so as to be 10 MPa or less. The operation method of the wiping apparatus of the multistage rolling mill described in 1.
P _m = 4.099 × √ {qE (r ₁ + r ₂ ) / r ₁ r ₂ } (1)
Where q: linear load per unit length of roller [kgf / mm],
E: Longitudinal elastic modulus of the roller [kgf / mm ² ],
r ₁ , r ₂ : radius of each pinch roller [mm]

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