JP2008212974A - Rolling mill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling mill with which the occurrence of chattering is effectively suppressed. <P>SOLUTION: A roll chock clamping device A is interposed between a roll chock and a housing, this roll chock clamping device A is provided with a clamping body 1 which is movable back and forth with respect to its base body part a, a spring rigidity means 2 for energizing this clamping body 1 and a vibration control means 3 for damping the vibration of the clamping body 1 and the spring rigidity means 2 and the vibration controlling means 3 are in parallel relationship and respectively linked to the clamping body 1. The roll chock clamping device A is fixed to the housing in the base body part a and the clamping body 1 is pressed against the roll chock by the spring rigidity of the spring rigidity means 2. The clamping body 1 is always pushed by following the vibration of the roll chock and, because the vibration of the roll chock is damped through this clamping body 1 with the vibration controlling mean 3, the vibration damping function is always displayed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for preventing vibration of a rolling mill.

In the rolling of a steel plate or the like, if chattering that is abnormal vibration of a rolling mill occurs, the thickness of the material to be rolled varies. For this reason, many proposals for preventing vibration of a rolling mill have been made conventionally. For example, Patent Documents 1 to 3 are techniques for appropriately maintaining the lubrication conditions of the rolling bite part that causes chattering.
On the other hand, not a countermeasure against the cause of chattering but a study on the structure of a rolling mill for preventing chattering from growing. Chattering is a natural vibration of a rolling mill, and is based on the idea that it is a vibration mode with a work roll having an upside down phase among a plurality of or innumerable natural vibration modes. For example, in Patent Document 4, a dynamic vibration absorber having a spring constant set to a frequency matched to the natural frequency of the rolling mill housing is installed on the housing to prevent vertical vibration of the work roll. Moreover, in patent document 5, it is going to prevent a vertical vibration by attaching a damper between the upper and lower work rolls of a rolling mill.

  By the way, the up-down anti-phase vibration mode of the work roll is a vertical vibration phenomenon, but when an actual chattering phenomenon occurs, vibrations in the horizontal direction as well as the vertical are coupled. In general, the vibration of a three-dimensional structure is coupled with the entire structure to form a vibration mode. If it is difficult to suppress the vibration of the part of interest, it is possible to change the natural frequency and damping ratio of the vibration mode by controlling the vibration in any direction of another part of the coupling, As a result, it is possible to suppress the vibration of the site of interest. The same concept can be applied to chattering of a rolling mill. The above-mentioned Patent Document 4 is based on such a concept. For example, Patent Document 6 discloses a concept of reducing the horizontal vibration of the roll chock in order to suppress chattering that is vertical vibration. . According to the idea of this patent document 6, it is possible to expand the installation range when devising a chattering suppression device, and the degree of freedom in device development increases.

  On the other hand, a roll chock clamping device is known as a roll chock pressing device. The roll exchange work of the rolling mill is an operation for taking out a roll unit (unit consisting of a work roll or a backup roll, a bearing and a roll chock (bearing box)) from the rolling mill housing and replacing it with a new one. In addition, a gap (play) is provided between the roll unit and the housing (sliding surfaces of both). Since the roll unit moves between the gaps during rolling, a roll chock clamp device is generally used in which a wedge-shaped liner is inserted or a linear cylinder that fills the gap is provided. For example, Patent Documents 7 to 10 show such roll chock clamp devices.

Japanese Patent Laid-Open No. 52-81054 JP 57-156807 A Japanese Unexamined Patent Publication No. 60-18219 Japanese Patent Laid-Open No. 5-104117 JP-A-9-174122 JP 2001-137915 A JP-A-61-129208 JP-A-8-174209 Japanese Utility Model Publication No. 63-80006 Japanese Patent Laid-Open No. 2001-340907

The technology for properly maintaining the lubrication conditions as shown in Patent Documents 1 to 3 has complicated factors such as rolling load, deformation resistance of the material to be rolled, deformation and friction of the roll, concentration of rolling oil, kinematic viscosity, temperature, and the like. Because of this, it is extremely difficult to always maintain a proper state in operations that change from day to day.
The technique of attaching a dynamic vibration absorber to a rolling mill as shown in Patent Document 4 and the technique of connecting the upper and lower work rolls as shown in Patent Document 5 with a damper directly attenuate the vertical vibration of the work roll. Although it is aimed, since the apparatus is complicated and large-scale, it hinders the roll exchanging work that frequently occurs in the actual operation, which is not realistic.

On the other hand, roll chock clamping devices as shown in Patent Documents 7 to 10 are expected to prevent chattering because the roll chock is fixed in the horizontal direction with respect to the housing. The function of the roll chock clamp device is to give a strong spring rigidity between the roll chock and the housing, and this spring rigidity is necessary to realize a state where the roll does not move relative to the housing in order to improve rolling accuracy. is there. However, strengthening the spring stiffness only changes the natural frequency of the rolling mill to some extent, and the effect of controlling chattering cannot be expected. In fact, according to the investigations and studies by the present inventors on the actual machine, no significant difference was found in the occurrence probability of chattering between the rolling mill equipped with the roll chock clamp device and the rolling mill not equipped.
Further, as described later, the technique disclosed in Patent Document 6 has been found by the inventors to have a chattering suppression function that does not sufficiently perform.
Accordingly, an object of the present invention is to provide a rolling mill that can solve such problems of the prior art and can effectively suppress the occurrence of chattering.

  Patent Document 6 shows that a damper device or a rigid pressing device is installed between the roll chock and the housing in the horizontal direction as the vibration control means. It was found that the vibration control means cannot perform an appropriate chattering suppression function. The reason for this is that in the damping means (for example, a damper device) of Patent Document 6, the damper works effectively for the first peak of vibration, but after the damper is pushed away, it plays between the roll chock and the damper. This is because the damper function cannot be exhibited. Needless to say, for example, when pressure in the choc pressing direction is generated in a hydraulic cylinder (damper) as shown in FIG. 9 of Patent Document 6, it is the same as that of hydraulic oil being enclosed, Does not work. In other words, the mechanism of Patent Document 6 can perform only one function of a damper function or a pressing function.

Therefore, as a result of repeated studies to solve such problems of the conventional technology, the spring stiffness means that functions as a spring stiffness element between the roll chock and the housing, and the vibration damping that also functions as a vibration damping element. It has been found that by providing a roll chock clamp device provided with the means in parallel, a very excellent chattering suppressing effect can be obtained.
The present invention has been made on the basis of such knowledge and has the following gist.

[1] A rolling mill in which a roll chock clamping device (A) is interposed between the roll chock and the housing, and the roll chock clamping device (A) restrains the roll chock with respect to the housing in the horizontal direction,
The roll chock clamp device (A) includes a clamp body (1) capable of advancing and retreating with respect to the base portion (a), spring stiffness means (2) for biasing the clamp body (1) with spring stiffness, A damping means (3) for attenuating the vibration of the clamp body (1), and the spring rigidity means (2) and the damping means (3) are linked in parallel with each other with the clamp body (1). And
In the roll chock clamp device (A), the base portion (a) is fixed to one member of the roll chock and the housing, and the clamp body (1) is spring rigid means with respect to the other member. A rolling mill characterized by being pressed with the spring rigidity of (2).
[2] The rolling mill according to [1], wherein the roll chock clamping device (A) is interposed between one or both sides of the work roll chock and / or the backup roll chock and the housing.

[3] The backup roll chock has a pair of arm portions, a work roll chock is disposed between the pair of arm portions, and a roll chock clamp device (A ₁ ) is interposed between the work roll chock and the arm portion of the backup roll chock. A rolling mill in which the work roll chock is restrained against the backup roll chock in the horizontal direction by the roll chock clamping device (A ₁ ),
The roll chock clamp device (A ₁ ) includes a clamp body (1) capable of moving forward and backward with respect to the base portion (a), spring stiffness means (2) for biasing the clamp body (1) with spring stiffness, A damping means (3) for attenuating the vibration of the clamp body (1), and the spring rigidity means (2) and the damping means (3) are arranged in parallel with each other with the clamp body (1). Work together
In the roll chock clamp device (A ₁ ), the base body (a) is fixed to one member of the work roll chock and the backup roll chock, and the clamp body (1) is fixed to the other member. A rolling mill that is pressed by the spring stiffness of the spring stiffness means (2).

[4] The rolling mill according to [3], wherein the roll chock clamping device (A ₁ ) is interposed between one or both sides of the work roll chock and the arm portion of the backup roll chock.
[5] In the rolling mill of the above [3] or [4], a roll chock clamp device (A ₂ ) is further interposed between the backup roll chock and the housing, and the backup roll chock is horizontally moved by the roll chock clamp device (A ₂ ). A rolling machine that restrains the housing with
The roll chock clamp device (A ₂ ) includes a clamp body (1) capable of moving forward and backward with respect to the base body portion (a), spring stiffness means (2) for biasing the clamp body (1) with spring stiffness, A damping means (3) for attenuating the vibration of the clamp body (1), and the spring rigidity means (2) and the damping means (3) are arranged in parallel with each other with the clamp body (1). Work together
In the roll chock clamp device (A ₂ ), the base body (a) is fixed to one member of the backup roll chock and the housing, and the clamp body (1) is a spring with respect to the other member. A rolling mill that is pressed by the spring rigidity of the rigid means (2).

[6] The backup roll chock has a pair of arm portions, a work roll chock is disposed between the pair of arm portions, a roll chock clamp device (A ₂ ) is interposed between the backup roll chock and the housing, and the roll chock clamp device According to (A ₂ ), a rolling mill in which the backup roll chock is constrained to the housing in the horizontal direction,
The roll chock clamp device (A ₂ ) includes a clamp body (1) capable of moving forward and backward with respect to the base body portion (a), spring stiffness means (2) for biasing the clamp body (1) with spring stiffness, A damping means (3) for attenuating the vibration of the clamp body (1), and the spring rigidity means (2) and the damping means (3) are arranged in parallel with each other with the clamp body (1). Work together
In the roll chock clamp device (A ₂ ), the base body (a) is fixed to one member of the backup roll chock and the housing, and the clamp body (1) is a spring with respect to the other member. A rolling mill that is pressed by the spring rigidity of the rigid means (2).

[7] The rolling mill according to [5] or [6], wherein the roll chock clamping device (A ₂ ) is interposed between one side or both sides of the backup roll chock and the housing.
[8] The rolling mill according to any one of [1] to [7], wherein the vibration damping means (3) includes a damper (3a).
[9] In the rolling mill of the above [8], the clamp body (1) is composed of a clamp piston (1a) capable of moving back and forth with respect to the base body (a), and the spring rigidity means (2) is fluid pressure, magnetic force, elasticity. It comprises an urging mechanism (2a) for urging the clamp piston (1a) by an urging action of at least one of the elastic forces of the body, and the vibration damping means (3) has the base part (a) and the clamp piston ( A rolling mill comprising a damper (3a) connecting between 1a).
[10] In the rolling mill according to [9], the damper (3a) includes a cylinder chamber (4) formed in the clamp piston (1a), and a piston disposed in the cylinder chamber (4) so as to be able to advance and retract. (5) and a piston rod (6) for connecting the piston (5) to the base body (a) through an insertion hole penetrating from the cylinder chamber (4) to the rear end of the clamp piston (1a). Rolling mill.

In the rolling mill of the present invention, the clamp body (1) constituting the roll chock clamp device (A), (A ₁ ), (A ₂ ) vibrates in the horizontal direction by the biasing action of the spring rigidity means (2). Following the displacement of the roll chock or the housing, it is always pressed against the roll chock, and the vibration damping means (3) attenuates the vibration of the roll chock through such a clamp body (1), so its vibration damping function is always effective. Can be demonstrated. For this reason, horizontal vibration of the roll is effectively suppressed, and chattering in which horizontal and vertical vibrations are coupled can be effectively suppressed. As a result, the rolling operation can be performed without considering the bite lubrication conditions for suppressing chattering. For example, the restriction of the rolling speed can be released, and the rolling / passing can be performed at the capacity limit of the rolling mill motor. A board becomes possible and productivity can be improved dramatically.

FIG. 1 is a conceptual diagram showing an embodiment of a rolling mill according to the present invention. In the figure, 7 is a housing, 8x and 8y are upper and lower work rolls, 10x and 10y are those roll chock (work roll chock), 9x and 9y are upper and lower backup rolls, 11x and 11y are those roll chock (backup roll chock), and A is a roll chock. It is a clamping device. In the following description, for convenience of explanation, the upper and lower work rolls 8x and 8y are “work roll 8”, the roll chock 10x and 10y are “roll chock 10”, and the upper and lower backup rolls 9x and 9y are “backup roll 9”. The roll chock 11x and 11y may be referred to as “roll chock 11”, respectively.
In this embodiment, a roll chock clamp device A is interposed between the roll chock 10x, 10y supporting both ends of the upper and lower work rolls 8x, 8y and the housing 7, and the roll chock clamp device A allows the roll chock 10x, 10y to be horizontally aligned. The housing 7 is restrained.

Each roll chock clamp device A has a clamp body 1 that can be moved back and forth with respect to the base portion a (device main body), a spring stiffness means 2 that biases the clamp body 1 with spring stiffness, It has damping means 3 (vibration damping means) for damping the vibration. The spring rigidity means 2 and the vibration damping means 3 are linked to the clamp body 1 so as to perform the above functions in a parallel relationship. That is, between the base part a and the clamp body 1, the spring rigidity means 2 urges the clamp body 1 to press it against the roll chocks 10x and 10y, and the vibration damping means 3 follows the roll chocks 10x and 10y and vibrates (displaces). ) To suppress the clamp body 1.
In each roll chock clamp device A, the base portion a is fixed to the housing 7, and the clamp body 1 is pressed against the roll chocks 10 x and 10 y by the spring stiffness of the spring stiffness means 2.

The spring rigidity means 2 may be any means as long as it can urge the clamp body 1 with its spring rigidity and press the clamp body 1 against the roll chock 10x, 10y. Usually, hydraulic pressure or gas pressure (pneumatic pressure or the like) is used. A biasing mechanism that biases the clamp body 1 by at least one biasing action of fluid pressure such as magnetism, magnetic force by a magnet, or elastic force by an elastic body such as a coil spring or a disc spring is used. The urging mechanism by the fluid pressure is substantially composed of a hydraulic cylinder mechanism, a pneumatic cylinder mechanism and the like. Further, as the urging mechanism, for example, a ball screw type conductive cylinder mechanism or the like may be used.
The damping means 3 attenuates the vibrations of the roll chocks 10x and 10y against which the clamp body 1 is pressed by the spring rigidity means 2 via the clamp body 1, and any means can be used as long as it can exhibit such a function. Normally, a damper (for example, a hydraulic damper, a friction damper, an MR damper (magnetoviscous fluid damper), an ER damper (electrorheological fluid damper), a lead damper, etc.) is used.

In the rolling mill of the present invention, the roll chock clamping device A may be provided between the roll chock 10 of the work roll 8 and the housing 7, or between the roll chock 11 of the backup roll 9 and the housing 7, or may be provided on both. Good. In this case, the roll chock clamp device A may be provided between both sides of the roll chock and the housing 7 as in the embodiment of FIG. 1, or may be provided between one side of the roll chock and the housing 7.
FIG. 2 is a conceptual diagram showing another embodiment of the rolling mill according to the present invention. The roll chock clamping device A includes not only the roll chock 10x, 10y of the work rolls 8x, 8y and the housing 7, but also the backup rolls 9x, 9y. The roll chock 11x, 11y and the housing 7 are also provided.
In addition, since the structure of each roll chock clamp apparatus A is the same as embodiment of FIG. 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

FIG. 3 is a conceptual diagram showing another embodiment of the rolling mill of the present invention, in which a roll chock clamp device A is provided only between one side of each roll chock 10x, 10y, 11x, 11y and the housing 7. In this case, the other side surface of each roll chock 10x, 10y, 11x, 11y is pressed against the main body of the housing 7 or a member integral therewith by the spring stiffness means 2 of the roll chock clamp device A. In the present embodiment, the other side surface of each roll chock 10x, 10y, 11x, 11y is pressed against a cylinder block 70 (a block incorporating a cylinder device such as a roll lifter) fixed to the main body of the housing 7. Yes.
In addition, since the structure of each roll chock clamp apparatus A is the same as embodiment of FIG. 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

In the rolling mill according to the present invention, the roll chock clamp device A may be configured such that the base body portion a is fixed to the roll chock and the clamp body 1 is pressed against the housing 7 by the spring stiffness of the spring stiffness means 2. . FIG. 4 is a conceptual diagram showing an embodiment of such a rolling mill. The base portion a of the roll chock clamp device A is fixed to the roll chocks 10x and 10y, and the clamp body 1 is spring-stiff with respect to the housing 7. It is pressed by the spring rigidity of the means 2. The same configuration may be applied to the roll chock clamp device A provided between the roll chock 11x, 11y and the housing 7.
In addition, since the other structure of each roll chock clamp apparatus A is the same as embodiment of FIG. 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

Further, the base portion a of the roll chock clamp device A may be directly fixed to the roll chock or the main body of the housing 7 or may be fixed via a liner or a block provided on the roll chock or the main body of the housing 7. May be. FIG. 5 is a conceptual diagram showing an embodiment in which the base portion a of the roll chock clamp device A is fixed to the housing 7 via a liner or a block, and the roll chock clamp provided between one side of the roll chock 10x, 10y and the housing 7 is shown. In the apparatus A, the base part a is fixed to the housing 7 via the liner 12. On the other hand, in the roll chock clamp apparatus A provided between the other side of the roll chocks 10 x and 10 y and the housing 7, the base part a has a block 13. Via the housing 7. The same configuration may be applied to the roll chock clamp device A provided between the roll chock 11x, 11y and the housing 7.
In addition, since the other structure of the roll chock clamp apparatus A is the same as embodiment of FIG. 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In the roll chock clamp apparatus A of each embodiment described above, the spring stiffness means 2 and the vibration damping means 3 are linked with the clamp body 1 in parallel, and the roll chock 10 or 11 (hereinafter “roll chock 10” is connected via the clamp body 1. ) Will be damped appropriately. That is, the clamp body 1 follows the displacement of the roll chock 10 that vibrates in the horizontal direction by the biasing action of the spring rigidity means 2, and the tip thereof is always pressed against the roll chock 10 or the housing 7. Since the vibration damping means 3 attenuates the vibration of the roll chock 10 through the clamp body 1 that follows the roll chock 10 in this way, it can always exert a vibration damping function, and therefore horizontal vibration of the roll is effective. Chattering in which horizontal and vertical vibrations are coupled is effectively suppressed.

Next, more specific embodiment of the roll chock clamp apparatus A with which the rolling mill of this invention is provided is described.
6 and 7 show an embodiment of a roll chock clamp device A, FIG. 6 is a longitudinal sectional view of the roll chock clamp device A, and FIG. 7 is a longitudinal sectional view partially showing a damper.
In the roll chock clamp apparatus A of this embodiment, the clamp body 1 shown in the conceptual diagram (FIGS. 1 to 5) is composed of a clamp piston 1a that can be moved back and forth with respect to the base portion a, and the spring stiffness means 2 is also used. Is constituted by an urging mechanism 2a for urging the clamp piston 1a by an urging action of hydraulic pressure, and the vibration damping means 3 is constituted by a damper 3a for connecting the base portion a and the clamp piston 1a. .

The base portion a of the roll chock clamp device A includes a cylinder 14 whose tip is open, and the clamp piston 1a is held in the cylinder 14 of the base portion a so as to be able to advance and retreat. The clamp piston 1a is slidably inserted into the cylinder 14 in the latter half portion. The clamp piston 1a is composed of a main body 100 and members 101 and 102 connected to the rear side thereof so as to have a structure in which the damper 3a is accommodated therein.
The urging mechanism 2a includes a cylinder chamber 140 which is a cylinder internal space facing the rear end of the clamp piston 1a, an oil liquid passage 15 for supplying hydraulic oil to the cylinder chamber 140, and the like. 15 is connected to a hydraulic pressure source (not shown). Such an urging mechanism 2a urges the clamp piston 1a by hydraulic pressure.

  The damper 3a is constituted by a hydraulic damper, and as shown in FIG. 7, a cylinder chamber 4 formed in the clamp piston 1a, a piston 5 disposed in the cylinder chamber 4 so as to be able to advance and retreat, and the piston And a piston rod 6 that couples 5 to the base portion a (cylinder 14). An insertion hole 16 penetrates from the cylinder chamber 4 to the rear end of the clamp piston 1 a, and the piston rod 6 fixed at one end to the piston 5 is inserted into the insertion hole 16, and the other end is at the cylinder 14. The piston 5 is connected to the base part a by being fixed to the inner bottom part.

An appropriate gap is provided between the piston 5 and the inner peripheral surface of the cylinder chamber 4, and this constitutes a passage 17 for moving the hydraulic oil as the piston 5 moves. The cylinder chamber 4 is filled and filled with hydraulic oil, and both sides (front and rear in the moving direction) of the piston 5 in the cylinder chamber 4 constitute oil liquid chambers 40a and 40b, respectively. 40 b communicates with the passage 17.
According to such a damper 3a, the vibration of the roll chock 10 or 11 is transmitted to the clamp piston 1a. For example, when the clamp piston 1a is displaced (moved) in the direction of the arrow k in the figure, the inside of the oil chamber 40a becomes high pressure. The hydraulic oil in the oil liquid chamber 40 a flows into the oil liquid chamber 40 b through the passage 17. In this way, a hydraulic resistance force is generated when the hydraulic oil passes through the passage 17, and the relative displacement of the piston 5 in the cylinder chamber 4 accompanying the displacement (movement) of the clamp piston 1 a is buffered by this hydraulic resistance force. The

In the roll chock clamp apparatus A as described above, the base portion a (cylinder 14 or the like) is fixed to the housing 7 so that the clamp piston 1a can advance and retract horizontally with respect to the roll chock direction. The urging mechanism 2a urges the clamp piston 1a by applying a certain hydraulic pressure, and the urged clamp piston 1a projects from the inner side surface of the housing, and the front end surface of the clamp piston 1a is a roll chock. 10 or 11 (hereinafter, described as an example of “roll chock 10”).
In the other drawings, reference numerals 18 and 19 denote seal members, and reference numeral 20 denotes a fixing member that is attached to the inner surface of the housing 7 and fixes the roll chock clamp device A.

  According to such a roll chock clamp device A, the biasing mechanism 2a as the spring rigidity means and the damper 3a as the vibration damping means are linked to the clamp piston 1a in a parallel relationship, and the roll chock 10 is connected via the clamp piston 1a. Damping vibration appropriately. In other words, the clamp piston 1 a follows the displacement of the roll chock 10 that vibrates in the horizontal direction by the biasing action of the biasing mechanism 2 a, and its tip is always pressed against the roll chock 10. Since the damper 3a attenuates the vibration of the roll chock 10 via the clamp piston 1a that follows the roll chock 10 in this way, it can always exhibit a vibration damping function, and thus effectively suppress the horizontal vibration of the roll. In addition, chattering in which horizontal and vertical vibrations are coupled is effectively suppressed.

In the roll chock clamp device A having the clamp piston 1a as shown in FIG. 6, the biasing means 2a can be of various types including the hydraulic system as in the above embodiment. (E.g., hydraulic pressure, gas pressure, etc.), one that biases the clamp piston 1a by at least one biasing action among a magnetic force by a magnet and an elastic force by an elastic body (for example, a coil spring, a disc spring, etc.) is used. Can do.
FIG. 8 is a longitudinal sectional view showing another embodiment of the roll chock clamp device A, and includes a biasing mechanism 2a that biases the clamp piston 1a by a pneumatic biasing action. The urging mechanism 2a includes a cylinder chamber 140 that is a cylinder internal space facing the rear end of the clamp piston 1a, a gas passage 21 that supplies the working air to the cylinder chamber 140, and the like. Do not lead to air pressure source. Such an urging mechanism 2a urges the clamp piston 1a when a constant air pressure is applied.
Since other configurations are the same as those of the embodiment of FIG. 6, the same reference numerals are given, and detailed description thereof is omitted.

FIG. 9 is a longitudinal sectional view showing another embodiment of the roll chock clamp apparatus A, and includes a biasing mechanism 2a for biasing the clamp piston 1a by a biasing action of a magnet. The urging mechanism 2a includes a magnet 22 fixed to the rear end of the clamp piston 1a, and a magnet 23 disposed and fixed on the inner bottom of the cylinder 14 so as to face the magnet 22. The magnet 22 and the magnet 23 have opposite polarities (for example, N poles), and the clamping piston 1a is biased by the biasing action caused by the repulsion of the magnetic force of both the magnets 22 and 23. The In general, the magnet 22 is a permanent magnet and the magnet 23 is an electromagnet, but both the magnets 22 and 23 may be permanent magnets or electromagnets.
Since other configurations are the same as those of the embodiment of FIG. 6, the same reference numerals are given, and detailed description thereof is omitted.

FIG. 10 is a longitudinal sectional view showing another embodiment of the roll chock clamp device A, and includes a biasing mechanism 2a that biases the clamp piston 1a by a biasing action of an elastic force of an elastic body. The urging mechanism 2a is composed of a single-layered or multi-layered disc spring 24 disposed on the inner bottom portion of the cylinder 14, and the clamp piston 1a is urged by the urging action by the elastic force of the disc spring 24. . The piston rod 6 passes through the disc spring 24 and is fixed to the cylinder 14. Note that a coil spring, a leaf spring, or the like may be used as the elastic body.
Since other configurations are the same as those of the embodiment of FIG. 6, the same reference numerals are given, and detailed description thereof is omitted.
Further, as the urging mechanism 2a, for example, a ball screw type conductive cylinder mechanism or the like may be used. In this case, the conductive cylinder, which is a rigid body, also has spring rigidity that can be expanded and contracted to some extent, and by this spring rigidity, it is possible to perform urging that sufficiently follows the displacement (vibration) of the clamp piston 1a.
6 to 10 show an example in which the base part a of the roll chock clamp device A is fixed to the housing 7, the base part a may be fixed to the roll chock side as shown in FIG. In other words, the cylinder 14 and the urging mechanism 2a constituting the base part a are provided in the roll chock.

Further, in the roll chock clamp device A having the clamp piston 1a as shown in FIG. 6, various types of dampers can be used as the damper 3a.
FIG. 11 is a longitudinal sectional view showing an embodiment in which another type of hydraulic damper is used as the damper 3a. The damper 3 a is provided with an orifice 25 that passes through the piston 5 in the axial direction. The hydraulic fluid chambers 40 a and 40 b communicate with each other through the orifice 25, and the hydraulic fluid passes through the orifice 25 as the piston 5 moves. To move. Therefore, the relative displacement of the piston 5 in the cylinder chamber 4 due to the displacement (movement) of the clamp piston 1a is buffered by the hydraulic resistance force when the hydraulic oil passes through the orifice 25.
Since other configurations are the same as those in the embodiment of FIG. 7, the same reference numerals are given, and detailed descriptions thereof are omitted.

In addition, as a hydraulic damper, the thing of appropriate structures, such as the structure which connects the fluid chambers 40a and 40b with the piping provided in the outer side of the cylinder chamber 4, for example, can be used.
FIG. 12 is a longitudinal sectional view showing an embodiment in which a friction damper is used as the damper 3a. In this damper 3a, the piston 5 frictionally slides on the inner wall of the cylinder chamber 4 in the axial direction, and the friction force generated at this time causes the relative movement of the piston 5 in the cylinder chamber 4 due to the displacement (movement) of the clamp piston 1a. The displacement is buffered.
Since other configurations are the same as those of the embodiment of FIG. 7, the same reference numerals are given, and detailed description thereof is omitted.
As the damper 3a, in addition to the above-described hydraulic damper and friction damper, for example, an appropriate type such as an MR damper (magnetic viscous fluid damper), an ER damper (electroviscous fluid damper), or a lead damper can be applied. .

As a form of the roll chock of the rolling mill, a structure in which the roll chock of the work roll is restrained by the roll chock of the backup roll is known, and the present invention may be applied to a rolling mill having such a structure. In this case, the roll chock clamping device A may be provided between the roll chock of the work roll and the roll chock of the backup roll, may be provided between the roll chock of the backup roll and the housing, or may be provided in both of them.
FIG. 13 is a conceptual diagram showing an embodiment of such a rolling mill.
The roll chock 11x of the upper backup roll 9x has a pair of hanging arm parts 110, and a roll chock 10x of the upper work roll 8x is disposed between the pair of arm parts 110, and the roll chock 10x and the arm of the roll chock 11x are arranged. between parts 110 a roll chocks clamping device a ₁ is interposed by the roll chocks clamping device a _1, and so as to restrain relative chocks 11x (arm portions 110 of the pair) the roll chock 10x in the horizontal direction.

Like the roll chock clamp device A shown in FIGS. 1 to 5, the roll chock clamp device A ₁ has a clamp body 1 that can be moved back and forth with respect to the base portion a (device main body), and the clamp body 1 is spring rigid. And a spring stiffness means 2 for urging and a damping means 3 (vibration damping means) for damping the vibration of the clamp body 1. The spring rigidity means 2 and the vibration damping means 3 are linked to the clamp body 1 so as to perform the above functions in a parallel relationship. That is, between the base part a and the clamp body 1, the spring rigidity means 2 urges the clamp body 1 to press it against the roll chock 10x, and the vibration damping means 3 follows the roll chock 10x and vibrates (displaces). Damping 1
Each roll chock clamp device A ₁ has its base part a fixed to the arm part 110 of the upper backup roll 9x, and the clamp body 1 has spring stiffness of the spring stiffness means 2 with respect to the roll chock 10x of the upper work roll 8x. It is pressed by.

Further, in this embodiment, between the upper backup roll 9x the roll chock 11x and the housing 7 is interposed roll chocks clamping device A _2, this roll chocks clamping device A _2, restrains relative to the housing 7 of the roll chock 11x in the horizontal direction I am doing so.
Each roll chock clamp device A ₂ also has a clamp body 1 that can be moved back and forth with respect to the base portion a (device main body), a spring stiffness means 2 that biases the clamp body 1 with spring stiffness, and a clamp body 1. The vibration damping means 3 (vibration damping means) is provided for damping the vibration. The spring rigidity means 2 and the vibration damping means 3 are linked to the clamp body 1 so as to perform the above functions in a parallel relationship. That is, between the base part a and the clamp body 1, the spring rigid means 2 urges the clamp body 1 to press it against the roll chock 11x, and the vibration damping means 3 follows the roll chock 11x and vibrates (displaces). Damping 1
Each roll chock clamp device A ₂ has its base part a fixed to the housing 7, and the clamp body 1 is pressed against the roll chock 11 x (arm part 110) of the upper backup roll 9 x by the spring rigidity of the spring rigidity means 2. It has been.

The functions and more specific embodiments of the roll chock clamp devices A ₁ and A ₂ are the same as those of the roll chock clamp device A of the above-described embodiment. For example, when applying the structure of FIGS. 6 to 10 in the roll chocks clamping device A _1, the base portion a is fixed to the roll chock 10x to the arm portion 110 or opposite thereto of chocks 11x. Also, when applying the structure of FIGS. 6 to 10 in the roll chocks clamping device A _2, its base portion a is fixed to the housing 7 or its opposite chocks 11x.
The above configuration may be applied to the roll chock 10y of the lower work roll 8y and the roll chock 11y of the lower backup roll 9y. In this case, a pair of arm portions extending upward is provided on the roll chock 11y. The roll chock 10y is arranged between the pair of arm portions.
Further, only _one of the roll chock clamping device A ₁ between the roll chock 11 of the backup roll 9 and the roll chock 10 of the work roll 8 and the roll chock clamping device A ₂ between the roll chock 11 of the housing 7 and the backup roll 9 may be provided. Good.
Further, roll chocks clamping device A ₁ and the roll chock clamping device A ₂ may be provided on both sides of the roll chocks as in the embodiment of FIG. 13, respectively, may be provided on one side of the roll chock in the same manner as FIG.

The conceptual diagram which shows one Embodiment of the rolling mill of this invention The conceptual diagram which shows other embodiment of the rolling mill of this invention The conceptual diagram which shows other embodiment of the rolling mill of this invention The conceptual diagram which shows other embodiment of the rolling mill of this invention The conceptual diagram which shows other embodiment of the rolling mill of this invention The longitudinal cross-sectional view which shows one Embodiment of the roll chock clamp apparatus A which the rolling mill of this invention has The longitudinal cross-sectional view which shows the damper of the roll chock clamp apparatus A of FIG. 6 partially The longitudinal cross-sectional view which shows other embodiment of the roll chock clamp apparatus A which the rolling mill of this invention has The longitudinal cross-sectional view which shows other embodiment of the roll chock clamp apparatus A which the rolling mill of this invention has The longitudinal cross-sectional view which shows other embodiment of the roll chock clamp apparatus A which the rolling mill of this invention has The longitudinal cross-sectional view which partially shows other embodiment of the damper which the roll chock clamp apparatus A has The longitudinal cross-sectional view which partially shows other embodiment of the damper which the roll chock clamp apparatus A has The conceptual diagram which shows other embodiment of the rolling mill of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Clamp body 1a Clamp piston 2 Spring rigidity means 2a Energizing mechanism 3 Damping means 3a Damper 4 Cylinder chamber 5 Piston 6 Piston rod 7 Housing 8x Upper work roll 8y Lower work roll 9x Upper backup roll 9y Lower backup roll 10x, 10y, 11x, 11y Roll chock 12 Liner 13 Block 14 Cylinder 15 Oil liquid passage 16 Insertion hole 17 Passage 18, 19 Seal member 20 Fixing member 21 Gas passage 22, 23 Magnet 24 Belleville spring 25 Orifice 40a, 40b Oil liquid chamber 70 Cylinder block 100 Main body 101, 102 member 110 arm part 140 cylinder chamber A, A ₁ , A ₂ roll chock clamp device a base part

Claims (10)

A roll mill in which a roll chock clamp device (A) is interposed between the roll chock and the housing, and the roll chock clamp device (A) restrains the roll chock with respect to the housing in the horizontal direction,
The roll chock clamp device (A) includes a clamp body (1) capable of advancing and retreating with respect to the base portion (a), spring stiffness means (2) for biasing the clamp body (1) with spring stiffness, A damping means (3) for attenuating the vibration of the clamp body (1), and the spring rigidity means (2) and the damping means (3) are linked in parallel with each other with the clamp body (1). And
In the roll chock clamp device (A), the base portion (a) is fixed to one member of the roll chock and the housing, and the clamp body (1) is spring rigid means with respect to the other member. A rolling mill characterized by being pressed with the spring rigidity of (2).   The rolling mill according to claim 1, wherein the roll chock clamping device (A) is interposed between one side or both sides of the work roll chock and / or the backup roll chock and the housing. The backup roll chock has a pair of arm portions, a work roll chock is disposed between the pair of arm portions, a roll chock clamp device (A ₁ ) is interposed between the work roll chock and the arm portion of the backup roll chock, A rolling mill in which a work roll chock is restrained against a backup roll chock in a horizontal direction by a roll chock clamp device (A ₁ ),
The roll chock clamp device (A ₁ ) includes a clamp body (1) capable of moving forward and backward with respect to the base portion (a), spring stiffness means (2) for biasing the clamp body (1) with spring stiffness, A damping means (3) for attenuating the vibration of the clamp body (1), and the spring rigidity means (2) and the damping means (3) are arranged in parallel with each other with the clamp body (1). Work together
In the roll chock clamp device (A ₁ ), the base body (a) is fixed to one member of the work roll chock and the backup roll chock, and the clamp body (1) is fixed to the other member. A rolling mill that is pressed by the spring stiffness of the spring stiffness means (2). The rolling mill according to claim 3, wherein the roll chock clamping device (A ₁ ) is interposed between one or both sides of the work roll chock and the arm part of the backup roll chock. Furthermore, the roll chock clamp device (A ₂ ) is interposed between the backup roll chock and the housing, and the roll chock clamp device (A ₂ ) is a rolling mill that restrains the backup roll chock with respect to the housing in the horizontal direction,
The roll chock clamp device (A ₂ ) includes a clamp body (1) capable of moving forward and backward with respect to the base body portion (a), spring stiffness means (2) for biasing the clamp body (1) with spring stiffness, A damping means (3) for attenuating the vibration of the clamp body (1), and the spring rigidity means (2) and the damping means (3) are arranged in parallel with each other with the clamp body (1). Work together
In the roll chock clamp device (A ₂ ), the base body (a) is fixed to one member of the backup roll chock and the housing, and the clamp body (1) is a spring with respect to the other member. The rolling mill according to claim 3 or 4, wherein the rolling machine is pressed by the spring rigidity of the rigid means (2). The backup roll chock has a pair of arm portions, a work roll chock is disposed between the pair of arm portions, a roll chock clamp device (A ₂ ) is interposed between the backup roll chock and the housing, and the roll chock clamp device (A ₂ ), A rolling mill that restrains the backup roll chock horizontally with respect to the housing,
The roll chock clamp device (A ₂ ) includes a clamp body (1) capable of moving forward and backward with respect to the base body portion (a), spring stiffness means (2) for biasing the clamp body (1) with spring stiffness, A damping means (3) for attenuating the vibration of the clamp body (1), and the spring rigidity means (2) and the damping means (3) are arranged in parallel with each other with the clamp body (1). Work together
In the roll chock clamp device (A ₂ ), the base body (a) is fixed to one member of the backup roll chock and the housing, and the clamp body (1) is a spring with respect to the other member. A rolling mill that is pressed by the spring rigidity of the rigid means (2). Roll chock clamping device (A _2), the rolling mill according to claim 5 or 6, characterized in that interposed between one or both sides and the housing of the backup roll chocks.   The rolling mill according to any one of claims 1 to 7, wherein the vibration damping means (3) comprises a damper (3a).   The clamp body (1) is composed of a clamp piston (1a) capable of moving forward and backward with respect to the base body portion (a), and the spring rigidity means (2) biases at least one of fluid pressure, magnetic force, and elastic force by the elastic body. It comprises an urging mechanism (2a) that urges the clamp piston (1a) by action, and the damping means (3) comprises a damper (3a) for connecting the base portion (a) and the clamp piston (1a). The rolling mill according to claim 8, wherein:   The damper (3a) includes a cylinder chamber (4) formed in the clamp piston (1a), a piston (5) disposed in the cylinder chamber (4) so as to be movable back and forth, and the cylinder chamber (4). The rolling mill according to claim 9, further comprising a piston rod (6) for connecting the piston (5) to the base body (a) through an insertion hole penetrating the rear end of the clamp piston (1a).

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