JPH10249434A - Device for rolling metallic strip and method for coiling metallic strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent fluttering and air entrapment efficiently at the time of coiling metallic strip. SOLUTION: This rolling mill is constituted so that two sets of coiling reels 2, 3 alternately execute coiling and uncoiling and the rolling mill passes metallic strip 4 to manufacture ultra thin metallic strip 4. In this case, on the strip passing route from deflector roll 7 to coiling reel 2, 3, a support roll 8 is arranged which contacts the metallic strip 4 from lower part with a constant pressing force, and at the same time a touch roll 9 is arranged to press the coiling point M of coil 4a with a prescribed pressing force, and support roll 8 and touch roll 9 are mounted on the same arm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal strip in which a rolling mill is arranged between two winding reels, and these winding reels are alternately wound and unwound to pass a metal strip through a rolling mill. The present invention relates to a sheet rolling device and a method for winding a metal strip.

[0002]

2. Description of the Related Art Rolling of an extremely thin metal strip is performed by alternately winding and rewinding two take-up reels and passing the metal strip through a rolling mill. It is performed by reducing the wall thickness by repeating the reduction. The ultra-thin metal strip thus manufactured is employed, for example, as a disc spring material for a keyboard switch or a metal carrier material.

FIG. 17 is a schematic view showing a conventional metal foil rolling apparatus. As shown in the figure, a multi-high rolling mill 101 such as a Sendzimir mill is employed for rolling an extremely thin metal strip, and the Sendzimir mill 101 is disposed between two take-up reels 102 and 103. That is, by winding and rewinding these two winding reels 102 and 103 alternately and passing the metal strip through the Sendzimir mill 101, the reduction of the metal strip is repeated to reduce the thickness. With the reduction, the rolling of the extremely thin metal strip 104 is performed. At the outlet side of the Sendzimir mill 101, rolling oil is supplied from an oil supply device (not shown).

[0004] Sendzimir mill 101 and each take-up reel 10
2 and 103, a squeezing roll 105 that performs oil draining of the metal band plate 104 in order from the front side to the rear side in the winding direction of the metal band plate 104, and a passing direction of the metal band plate 104. A deflector roll 106 to be changed is arranged.

Japanese Patent Publication No. 54-30938 (hereinafter referred to as "Cited Example 1") discloses "a method and an apparatus for temper rolling a stainless steel strip" as a technique relating to rolling of such a metal strip. The invention has been reported. The gist of the present invention is that "a steel strip has a yield stress of 0.32-0.6.
A dry pass is performed by a temper rolling mill while applying a five-fold rolling tension, and a constant pressing force is applied to the surface of the steel strip after the dry scan pass by a roll movable between a deflector roll and a take-up reel. In particular, the anti-wrinkle roll is pressed against the surface of the steel strip between the deflector roll and the take-up reel, and according to the present invention,
It is possible to prevent wrinkles from occurring in the steel strip.

[0006] Japanese Patent Application Laid-Open No. 1-245917 (hereinafter referred to as "Cited Example 2") reports an invention relating to a "winding method of a foil strip". The gist of the present invention is:
In the method for winding a rolled foil strip, the joint between the wound foil coil and the foil strip to be wound or the vicinity of the upstream side of the joint is wound while being pressed against a pressing roll. Specifically, a pressing roll is pressed against the surface of the foil winding coil. According to the present invention, vertical wrinkles at the time of winding, which is the biggest obstacle in the production of rolled foils of 0.1 mm or less, can be easily removed. Thus, the product yield can be significantly improved.

[0007]

The invention relating to the "temper rolling method and apparatus for stainless steel strip" of the cited reference 1 and the invention relating to the "winding method of the foil strip" of the cited reference 2 are described. The main aim is to prevent wrinkles from occurring in the steel strip or foil strip, and when winding the coil on the take-up reel, the oil is drained from the rolling oil, the occurrence of fluttering (vibration) due to high-speed threading, and No consideration was given to air entrapment in the coil. Therefore,
Rolling oil remains on the surface of the metal strip wound up as a coil, and it takes a long time to clean it, and when it is passed at high speed, fluttering occurs between the deflector roll and the take-up reel. Or the air was further entrained, resulting in coil misalignment.

[0008] The present invention has been made to solve the above problems, and by combining a support roll and a touch roll, the rolling oil remaining on the surface of the metal strip can be reliably drained, In addition, a metal strip rolling apparatus and a metal strip that can prevent fluttering from occurring even when high-speed threading is performed, and can further prevent air entrapment in the coil and suppress coil winding deviation. An object of the present invention is to provide a winding method.

[0009]

SUMMARY OF THE INVENTION The object of the present invention is to provide a rolling apparatus for a metal strip according to the present invention, in which two winding reels are alternately wound and unwound to pass the metal strip to a rolling mill. It is an apparatus for manufacturing an ultra-thin metal strip by repeatedly rolling down by stripping, and in a metal strip rolling apparatus in which a deflector roll for changing the passing direction of the metal strip in front of each take-up reel is provided. In the passing path from the deflector roll to the take-up reel, a support roll that comes into contact with the metal strip with a certain pressing force from below the metal strip is disposed at the winding portion of the strip coil wound on the take-up reel. A touch roll for holding the take-up point with a constant pressing force is arranged, and the support roll and the touch roll are provided on the same arm.

[0010] Preferably, the arm is provided with an advancing / retreating means for rotating the arm, and the touch roll connects the axis of the take-up reel to a plate contact point of the deflector roll in accordance with the winding of the coil. It retreats on an orbit of an arc having a straight line as a diameter.

Preferably, the pressing force of the touch roll is set to a pressure of 150 kg or less.

Still preferably, at least the vicinity of both ends of the support roll and the touch roll is formed as a suction roll for sucking and removing oil remaining on the surface of the metal strip. A rolling device for a metal strip according to any one of claims 1 to 3.

On the other hand, according to the method for winding a metal strip according to the present invention, an appropriate tension is applied to the metal strip when the ultrathin metal strip rolled down by a rolling mill is wound on a take-up reel. In a winding method of a metal strip that changes a sheet passing direction by a deflector roll, in a threading path from the deflector roll to a take-up reel, a support roll is brought into contact with the metal strip with a constant pressing force from below the metal strip. A support roll and a touch roll equipped on the same arm in accordance with the thickness of the coil as the winding point of the strip coil wound on the winding reel is held down with a constant pressing force by a touch roll. Is set back.

Preferably, a position sensor is provided in the advance / retreat device for rotating and moving the arm, and the position sensor detects the position of the touch roll and calculates the winding diameter of the coil to reduce the pressing force of the touch roll. It is intended to be controlled.

[0015] Preferably, by calculating the winding diameter of the coil and calculating the interference position between the coil and the support roll, the arm is rotated by an advance / retreat device based on the calculated value. The position of the support roll is controlled.

Further, preferably, when the support roll is retracted, the winding speed of the take-up reel is reduced.

According to the present invention, since the support roll is brought into contact with the metal strip from below under a constant pressing force in the passing path from the deflector roll to the take-up roll, wrinkles are generated on the metal strip. Can be prevented. In addition, the winding point of the strip coil wound on the take-up reel is held at a constant pressing force by a touch roll, preventing air from getting into the coil and preventing coil misalignment. Can be suppressed. Furthermore, since the support roll and the touch roll are combined, even when the winding speed of the winding reel is increased and the sheet is passed at a high speed, it is possible to prevent the metal strip from fluttering. Since at least both ends of the support roll and the touch roll are formed as suction rolls, the rolling oil remaining on the surface of the metal strip can be reliably removed by suction.

Further, since the support roll and the touch roll mounted on the same arm are retracted in accordance with the winding thickness of the coil, the pressing force of the support roll and the touch roll can be maintained at a constant level. Even if it is thick, the coil and the support roll do not interfere.

[0019]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic view showing one embodiment of a metal strip rolling apparatus according to the present invention. As shown in the figure, in a metal strip rolling apparatus 1 of the present embodiment, two take-up reels 2 and 3 are arranged at an interval of, for example, about 8 m.
A rolling mill 5 for rolling the metal strip 4 is disposed at the center between the three. In the present embodiment, a multi-high rolling mill such as a Sendzimir mill is used as the rolling mill 5. The Sendzimir mill 5 has, for example, a rolling speed of 300 mpm, a maximum rolling load of 60 t, a work roll diameter of 30 mm, an intermediate roll diameter of 70 mm, and a backup roll diameter of 1 mm.
It is set to 60 mm.

That is, these two take-up reels 2, 3
Are alternately wound and unwound, and the metal strip is passed through the Sendzimir mill 5 so that the thickness of the metal strip is reduced, whereby the extremely thin metal strip 4 is rolled. Things. At the outlet side of the Sendzimir mill 5, an oil supply device (not shown) for spraying rolling oil from above to form an oil film on the front and back surfaces of the metal strip 4 is provided.

Further, between the Sendzimir mill 5 and each of the take-up reels 2 and 3, the metal strip 4 is arranged in order from the front side to the rear side in the winding direction (rolling direction) of each take-up reel 2 and 3. Roll 6 for removing oil from rolling oil
And a deflector roll 7 for changing the direction in which the metal strip 4 passes. Further, between the squeezing roll 6 and the deflector roll 7, a thickness gauge, a shape control roll and the like (not shown) are arranged as required. In the present embodiment, a squeeze roll 6 that squeezes oil by contacting a two-stage upper surface and a one-stage lower surface roll with the front and back surfaces of the metal strip 4 is employed as the oil draining device, but is not limited thereto. Instead, for example, an air wiper that changes the number of rolls of a squeeze roll, or blows air to perform oil removal, or a rubber wiper that contacts rubber to perform oil removal may be used.

As shown in FIG. 2, a support roll 8 is disposed on each of the passing paths from each of the deflector rolls 7 to each of the winding rolls 2 and 3. Each support roll 8 is configured to contact the metal strip 4 with a constant pressing force from below. Also, take-up reel 2,
The metal strip 4 is wound on the strip 3 as a strip coil 4a, and a touch roll 9 that presses the winding point M with a constant pressing force is arranged at a winding portion of the coil 4a.

As shown in FIGS. 3 and 4, the support roll 8 and the touch roll 9 are mounted on the same arm 10. This arm 10 is mounted on take-up reels 2, 3
A rotating shaft 12 supported by a fixed frame 11 is attached to an upper end portion of the rotating shaft 12 so as to rotate around the rotating shaft 12. A touch roll 9 is pivotally supported at the lower end of the arm 10 so as to face the take-up reels 2 and 3, and a support roll 8 is pivotally supported at a middle portion thereof so as to face the take-up reels 2 and 3. An advancing / retracting device 13 for rotating the arm 10 is attached to the back side of the support roll 8.

In the present embodiment, for example, a hydraulic cylinder device is used as the reciprocating device 13. However, the present invention is not limited to this, and the arm 10 can be rotated and the support roll 8 and the touch roll Other mechanical or electric actuators may be employed as long as a constant pressing force can be applied to the actuator 9. Here, the pressing force of the support roll 8 is a pressure that can prevent generation of wrinkles and fluttering on the metal strip 4,
In addition, the pressure is set to such an extent that slip on the deflector roll 7 can be prevented. The pressing force of the touch roll 9 is set to 150 kg or less in order to prevent the occurrence of winding disorder and wrinkles due to roll flaws and defective shape of the metal strip 4 (defectiveness such as crown and taper). Since these pressing forces are applied by the above-mentioned advance / retreat device 13,
It is necessary to design the bending angle of the arm 10 so as to obtain a desired pressing force.

As shown in FIG. 5 and FIG. 6, the retracting means 13 provided on the arm 10 is reduced in length in accordance with the winding of the coil 4a, so that the touch roll 9 can take up the take-up reels 2, 3. Is moved backward on a trajectory of an arc R having a diameter of a straight line L connecting the axis of the shaft and the deflector roll 7 to the plate contact point. When the touch roll 9 moves backward on the trajectory of the arc R, the support roll 8 is disposed on the same arm 10, so that the support roll 8 also retreats in an arc centered on the contact point of the deflector roll 7. become. In FIG. 5, reference numeral 14 denotes a support frame for the take-up reels 2 and 3, and a base end of the support frame 14 is supported by a rotating shaft 15.
The take-up reels 2 and 3 are pivotally supported at the distal end thereof. The support frame 14 is provided with a support lift cylinder device 16 for rotating the support frame 14 about the rotation shaft 15 as a fulcrum.

Further, as shown in FIG. 7, the support roll 8 and the touch roll 9 have at least a range near both ends except for a center portion thereof for sucking and removing rolling oil remaining on the surface of the metal strip 4. Is formed as a suction roll 17. As shown in FIG. 8, the suction roll 17 is formed by uniformly stacking compressed fibers 17b such as a nonwoven fabric around a pipe 17a having a large number of through holes. By contacting the surface of the edge portion 4 with the surface of the edge portion, the oil pool at the edge portion is adsorbed by the capillary action in the gap between the fibers, and the inside of the porous pipe 17a is evacuated by a vacuum pump (not shown) to thereby remove the oil. Is collected and removed.

As described above, in the support roll 8 and the touch roll 9, the surface adsorption range of the rolling oil is divided because the oil pool easily occurs particularly at the edge of the metal strip 4, and the rolling remaining on the portion is particularly difficult. This is because the oil is adsorbed and removed. Therefore, in the present embodiment, at least the area near both ends of the support roll 8 and the touch roll 9 is formed as the suction roll 17, but is not limited to this, and the entire roll may be formed as the suction roll.

Next, a method of winding a metal strip according to the present invention, which is performed by using the metal strip rolling apparatus 1 configured as described above, will be described. That is, as shown in FIGS. 1 and 2, the winding method according to the present embodiment uses the winding reel 2,
When the ultrathin metal strips 4 pressed down by the Sendzimir mill 5 are alternately wound on the metal strips 3, an appropriate tension is applied to the metal strips 4, and the passing path to the take-up reels 2, 3 via the deflector roll 7. In, the support roll 8 is brought into contact with the metal strip 4 from below under a constant pressing force. Further, with the contact of the support roll 8, at the winding portion of the strip coil 4 a wound on the winding reels 2 and 3, the winding point M is pressed by the touch roll 9 with a constant pressing force.

From the deflector roll 7 to the take-up reels 2, 3
The reason why the support roll is pressed into contact with the metal strip 4 in the pass-through path leading to is to prevent the metal strip 4 from wrinkling. On the other hand, pressing the winding point M of the winding reels 2 and 3 by the touch roll 9 is performed by the coil 4a.
This is for preventing the air from getting into the coil 4a and suppressing the winding deviation of the coil 4a.

As described above, in addition to assisting the winding operation of the take-up reels 2 and 3 with the touch roll 9, the use of the support roll 8 together increases the winding speed of the take-up reels 2 and 3. This is because the fluttering of the metal strip 4 can be extremely effectively prevented in the case of high-speed passing.
Only by combining the functions of the support roll 8 and the touch roll 9 can high-speed rolling be supported.
FIG. 9 is an explanatory diagram showing the fluttering prevention effect when the support roll and the touch roll are used together. As shown in the figure, when the support roll is not provided or only the support roll is provided, the plate vibration width greatly exceeds the coil winding turbulence limit, whereas the support roll and the touch roll are used together Indicates that even when the winding speed is increased, the plate vibration width is below the coil winding turbulence limit.

FIG. 10 is an explanatory view showing the state of breakage of the metal strip depending on the presence or absence of the support roll. As shown in the figure, when the support roll is not provided, if the winding speed is increased, the metal strip is broken. It can be seen that the strip does not break. That is, if the support roll and the touch roll are used together, the fluttering of the metal strip 4 can be reliably prevented.

FIG. 11 is an explanatory view showing the pressing force required for the touch roll. As described above, the pressing force of the touch roll is set to 150 kg or less. This is because, as shown in FIG.
If the coiling weight is more than 1 kg, the coil 4a may be pressed or distorted.
It is set to 50 kg or less.

The pressing force of the touch roll 9 is, as shown in FIG. 12, provided with a position sensor (not shown) on an advance / retreat device 13 for rotating the arm 10 in advance. 9 (ST1), and calculates the winding diameter of the coil 4a (ST1).
2) Control is performed based on these values.

Further, the support roll 8 and the touch roll 9 mounted on the same arm 10 are retracted in accordance with the thickening of the coil 4a to prevent interference with the coil 4a. This retreating operation shortens the reciprocating device 13 and moves the
Is pivoted rearward, specifically, as shown in FIG. As shown, the coil 4a
Is calculated (ST11), and the interference position between the coil 4a and the support roll 8 is calculated (S11).
T12) The arm 10 is rotated by the advance / retreat device 13 based on the calculated value (ST13) to control the retreat position of the support roll 8 (ST1).
4).

When the support roll 8 is retracted together with the touch roll 9, the winding speed of the winding reels 2, 3 is reduced. This is because if the winding speed is not reduced, the contact effect of only the touch roll 9 works and the contact effect of the support roll 8 cannot be expected. FIG.
As shown in FIG. 4, if only the contact effect of the touch roll acts, the plate vibration width exceeds the allowable value. For example, when the support roll and the touch roll are retracted at the winding speed of A to prevent interference, It is preferable that the winding speed is reduced to the range of B and the winding is performed.

At this time, as shown in FIG. 15, the thrust F of the advance / retreat device when the support roll 8 retreats is represented by α being the angle of the support roll 8 before retreat, and δ being the angle of the support roll 8 after retreat. Then, cosδ / cos (δ +
It is preferable to decrease at the ratio represented by α).

Thus, according to the present embodiment, the support roll 8 is brought into contact with the metal strip 4 from below under a constant pressing force in the passing path from the deflector roll 7 to the winding rolls 2 and 3. In addition, it is possible to prevent wrinkles from being generated in the metal strip 4.

In the winding portion of the strip coil 4a wound on the winding reels 2, 3, the winding point M is held down by the touch roll 9 with a constant pressing force.
It is possible to prevent air from being caught in the coil 4a and suppress the winding deviation of the coil 4a. This is because, as shown in FIG. 16, air entrainment occurs at position 1 and comes into contact with the end face of the coil 4a first, so that the effect of preventing fluttering is small. Contact point before it is applied, a bending stress in the direction opposite to the winding direction is applied, and the metal strip plate breaks, the touch roll rises,
The reason for this is that although the effect of preventing the winding displacement is reduced, at the position 2, the winding point M is held down, so that air entrainment and fluttering can be effectively prevented.

Further, since the support roll 8 and the touch roll 9 are used in combination, even if the winding speed of the winding reels 2 and 3 is increased and high-speed passing is performed, fluttering occurs on the metal strip 4. Can be effectively prevented. Since at least both ends of the support roll 8 and the touch roll 9 are formed as the suction rolls 17, the rolling oil remaining as an oil pool on the surface of the edge of the metal strip 4 can be reliably removed by suction. Things.

[0040]

As described above, according to the present invention, the support roll is brought into contact with the metal strip with a constant pressing force from below the metal strip in the passing path from the deflector roll to the take-up roll. Wrinkles can be prevented from being generated on the band plate, and the winding part of the band plate coil is held down with a constant pressing force by the touch roll. Can be suppressed. Further, since the support roll and the touch roll are used together, even when high-speed sheet passing is performed, occurrence of fluttering can be prevented. Furthermore, since at least both ends of the support roll and the touch roll are formed as suction rolls, an excellent effect that the rolling oil remaining on the surface of the metal strip can be reliably removed by suction is exerted.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a metal strip rolling apparatus according to the present invention.

FIG. 2 is a schematic view showing a main part of the rolling device of the present embodiment.

FIG. 3 is a front view showing a structure of a deflector roll, a support roll, and a touch roll in the embodiment.

FIG. 4 is a side view showing a structure of a support roll and a touch roll arranged on the same arm in the embodiment.

FIG. 5 is a schematic diagram illustrating a movement trajectory of a touch roll according to the embodiment.

FIG. 6 is a schematic diagram illustrating a movement trajectory of a touch roll according to the embodiment.

FIG. 7 is a schematic front view showing a structure of a support roll and a touch roll in the embodiment.

FIG. 8 is a side sectional view showing a structure of a suction roll in the present embodiment.

FIG. 9 is a conceptual explanatory diagram showing a fluttering prevention effect when a support roll and a touch roll are used together in the present embodiment.

FIG. 10 is an explanatory view showing a breaking state of a metal strip depending on the presence or absence of a support roll in the present embodiment.

FIG. 11 is an explanatory diagram showing a pressing force required for a touch roll in the present embodiment.

FIG. 12 is an explanatory diagram illustrating a method of controlling a pressing force of a touch roll in the present embodiment.

FIG. 13 is an explanatory diagram showing a support roll position control method in the present embodiment.

FIG. 14 is an explanatory diagram showing a method of reducing the winding speed when the support roll is retracted in the present embodiment.

FIG. 15 is an explanatory diagram showing a method of reducing the thrust of the advance / retreat device when the support roll is retracted in the present embodiment.

FIG. 16 is an explanatory diagram showing an optimal position of a touch roll in the present embodiment.

FIG. 17 is a schematic view showing a conventional metal strip rolling apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolling device 2, 3 Take-up reel 4 Metal strip 4a Coil 5 Rolling machine 7 Deflector roll 8 Support roll 9 Touch roll 10 Arm 13 Advance / retreat device 17 Suction roll

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yoshihiro Fujii 3434 Shimada, Hikari-shi, Yamaguchi Prefecture Nippon Steel Corporation Hikari Works (72) Inventor Shuji Nagasaki 3434 Shimada, Hikari-shi, Hikari-shi, Yamaguchi New Japan Inside Hikari Steel Works, Ltd.

Claims (8)

[Claims] An apparatus for manufacturing an ultra-thin metal strip by repeatedly rolling down two winding reels by alternately winding and rewinding them and passing the metal strip through a rolling mill. In a metal strip rolling device in which a deflector roll for changing the direction of passing of the metal strip is disposed in front of the take-up reel, the metal strip is fixed from below to the pass of the deflector roll to the take-up reel. In addition to disposing a support roll that comes into contact with the pressing force of the above, a touch roll that presses the winding point with a constant pressing force at the winding portion of the strip coil wound on the winding reel is arranged, and these support roll and A rolling device for a metal strip, wherein a touch roll is provided on the same arm. 2. The arm has an advancing / retreating means for rotating the arm, and the touch roll is a straight line connecting the axis of the take-up reel and the plate contact point of the deflector roll in accordance with the winding of the coil. The rolling device for a metal strip according to claim 1, wherein the rolling device retreats on an orbit of an arc having a diameter of. 3. The pressing force of the touch roll is 150 k.
The pressure is set to be equal to or less than g.
2. A rolling device for a metal strip according to claim 1. 4. The support roll and the touch roll at least near both ends thereof are formed as suction rolls for sucking and removing oil remaining on the surface of the metal strip. 2. A rolling device for a metal strip according to claim 1. 5. Winding an ultra-thin metal strip rolled down by a rolling mill on a take-up reel by applying an appropriate tension to the metal strip and changing the passing direction by a deflector roll. In a method, a support roll is brought into contact with a metal strip from below the metal strip with a constant pressing force in a threading path from the deflector roll to a take-up reel, and a winding section of a strip coil wound around the take-up reel. Then, the take-up point is held down with a constant pressing force by a touch roll, and the support roll and the touch roll mounted on the same arm are retracted in accordance with the winding of the coil. Winding method. 6. An advance / retreat device for rotating and moving an arm is provided with a position sensor. The position sensor detects the position of the touch roll and calculates the winding diameter of the coil to control the pressing force of the touch roll. The method for winding a metal strip according to claim 5, wherein: 7. A method for calculating a winding diameter of a coil,
Calculate the interference position between this coil and the support roll,
7. The method according to claim 5, wherein the position of the support roll is controlled by rotating the arm by an advance / retreat device based on the calculated value. 8. The method for winding a metal strip according to claim 5, wherein the winding speed of the winding reel is reduced when the support roll is retracted.