JP3064141B2 - Plate rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet rolling mill for reducing the thickness of a sheet material or a strip material by rolling to obtain a sheet product or a strip product having a predetermined thickness.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory view of an example of a sheet rolling mill described in Japanese Patent Application No. 03-230450 previously filed by the applicant of the present application, wherein (A) is an overall explanatory view, and (B) is an explanatory view. FIG. 4 is a plan view showing the arrangement of divided reinforcing rolls. For example, the upper roll assembly is a divided reinforcing roll divided into three or more in the axial direction (seven in the example of FIG. 3), 2A to 2C, 3A to 3D, 4A to 4
C is a mechanism for supporting the work roll 1, and each of the divided reinforcing rolls (2A,..., 4C) is independently provided with a load detecting device 5 to 7 and an independent divided reinforcing roll pressing device 8 to
10 are provided.

FIG. 3 shows axially 3A, 2A and 4A, 3B,
This is an example of a divided reinforcing roll divided into 7 into 2B and 4B, 3C, 2C, 4C, and 3D, but the number of divisions may be 3 or more. FIG. 3 shows an example in which split reinforcing rolls are used for both the upper roll assemblies 1 to 10 and the lower roll assemblies 1 ′ to 10 ′, but the split reinforcing rolls are used for one of the upper and lower roll assemblies. It may be. In the drawing, reference numeral 12 denotes a rolling mill housing, and reference numeral 13 denotes a rolled material.

[0004] For example, in a conventional rolling mill for controlling the crown and shape of a roll, which detects the thickness and the shape of the sheet on the discharge side of the rolling mill and adjusts the deflection of the work roll based on the detected thickness, an abnormality occurs in the crown and shape of the rolling mill. In this case, the adjustment of the bending shape of the work roll is started after a portion having an abnormality in the sheet crown / shape leaves the rolling mill and reaches the sheet thickness measuring device or the sheet shape measuring device. For this reason, there is a problem that it takes a long time until the adjustment of the deflection of the work roll is completed, and the rolled material that has passed through the rolling mill during this time lag has not corrected the sheet crown shape. Further, there is a problem that the accuracy of adjusting the deflection of the work roll is insufficient with the conventional methods such as a work roll bender and an intermediate roll bender.

[0005] In the plate rolling mill shown in FIG. 3, based on a load detected by a load detecting device provided independently for each of the divided reinforcing rolls, a dedicated split reinforcing roll reduction provided independently for the divided reinforcing rolls is used. The device adjusts the load of the divided reinforcing roll to adjust the deflection of the work roll 1. Therefore, FIG.
According to the rolling mill, when an abnormality of the sheet crown / shape occurs, the abnormality of the sheet crown / shape is detected at the same time when the tip of the abnormal part passes through the work roll, and therefore, the deflection of the work roll is immediately adjusted, and It can be adjusted with high accuracy. Therefore, when the sheet rolling mill shown in FIG. 3 is used, the control accuracy of the sheet crown and shape of the rolled material is remarkably improved.

However, in the plate rolling mill shown in FIG. 3, since a large number of divided reinforcing rolls are directly attached to the rolling mill housing, maintenance work such as replacement of the divided reinforcing rolls is complicated and takes a long time. There is a problem that the rolling operation cannot be performed. Also, for example, when rolling a thin rolled material next to a thick rolled material, using each split reinforcement roll rolling down device,
In the case of a thick rolled material, each split reinforcing roll is largely retracted, and in the case of a thin rolled material, each split reinforcing roll is greatly advanced, but the contact point between each split reinforcing roll and the work roll 1 is Since the sheet thickness of the rolled material 13 changes greatly when the reinforcing roll is largely retracted and when it is greatly advanced, and therefore, when the moving distance between the forward and backward movements of each split reinforcing roll is large, the split reinforcing is performed. There is a problem that the roll is easily damaged by excessive force. Also,
The plate mill of FIG. 3 requires a special mill housing 12,
There is a problem that the stand of the existing rolling mill cannot be used.

[0007]

According to the present invention, at least one of the upper and lower roll assemblies exemplified in FIG. 3 has a mechanism for supporting a work roll by a divided reinforcing roll divided into three or more in the axial direction. In a plate rolling mill provided with an independent load detection device and a split reinforcing roll pressing device for each split reinforcing roll, the stand of the existing rolling mill can be used, and maintenance work such as replacing the split reinforcing roll is easy. In addition, sufficient maintenance can be performed without stopping the rolling work for a long time, and excessive force acts on the split reinforcing roll pressing device etc. because the moving distance between the advance and retreat of each split reinforcing roll is small. It is an object to provide a plate rolling mill that requires less work.

[0008]

FIG. 1 is an explanatory view of an example of a sheet rolling mill according to the present invention, (A) is an explanatory view of a front view, and (B) is an explanatory view.
Are the split reinforcing rolls (2A, 2B, 2C, 3A, 3B, 3
FIG. 3C is an explanatory plan view showing an example of the arrangement of the work rolls (1) and (3D).

According to the present invention, at least one of the upper and lower roll assemblies (the upper and lower roll assemblies in FIG. 1) is divided into three or more (in FIG. 1, seven in FIG. 1) divided reinforcing rolls 2A and 2B. , 2C, 3A, 3B,
A mechanism for supporting the work roll 1 by 3C and 3D,
Independent load detection device 5 for each divided reinforcing roll, for example, 2C
C and a split reinforcing roll pressing device 8C are arranged. For example, the split reinforcing roll 3D is provided with an independent load detecting device 6D and a split reinforcing roll pressing device 9D.

In the present invention, for example, the split reinforcing roll unit U2c including the split reinforcing roll 2C, the load detecting device 5C, and the split reinforcing roll pressing device 8C includes, for example, the split reinforcing roll 3D, the load detecting device 6D, and the split reinforcing roll pressing device. The split reinforcing roll unit U3D made of 9D is disposed on a common inner housing 11, and the inner housing 11 is a mill pressure reducing device 14 provided on a mill housing 12.
Thereby, it is formed so as to be movable (elevated and lowered) in the rolling direction.

That is, according to the present invention, each of the divided reinforcing roll units U2A, U2B, U2C, U3A, U3B, U3C, U comprising a divided reinforcing roll, a load detecting device and a divided reinforcing roll pressing device.
Each of the 3Ds is mounted on a common inner housing 11, and the inner housing 11 is a mill housing 1
2 and move up and down.

Each of the divided reinforcing roll units U2A,..., U3D and the inner housing 11 is held, for example, by two, and two sets of the upper roll assembly shown in FIG. The other set can be used as a spare roll assembly to perform maintenance work such as replacing the split reinforcing roll without being attached to the mill housing 12. Replacement becomes easy. In addition, if the roll assembly used for rolling is replaced with a spare roll assembly for which maintenance work has been completed, the rolling work using a well-maintained roll assembly can be performed without stopping the rolling work for a long time. Work is always possible. According to the present invention, the stand of the existing rolling mill can be used.

Further, as described above, when the thickness of the rolled material 13 changes greatly, the prior art method of adjusting the position of the divided reinforcing rolls only by the divided reinforcing roll rolling-down device alone uses the reaction force from the work roll 1. The direction and the operating direction of the split reinforcing roll pressing device do not match, and the split reinforcing roll pressing device receives a large thrust force. In order to avoid damage to the equipment due to such thrust force, in the sheet rolling mill of the present invention, the split reinforcing roll unit is connected to the inner housing 1.
1 and the entire inner housing 11 can be displaced in the plate thickness reduction direction by a reduction device 14 arranged in a mill housing 12. By doing so, the individual reduction amount of the divided reinforcing rolls can be minimized, and the above-described problem of the thrust force can be solved. In addition, the precision of the divided reinforcing roll reduction mechanism can be easily improved. .

In the second plate rolling mill according to the present invention, the inner housing 11 is provided on the sliding contact surface with the mill housing 12, and the resistance of the inner housing 11 to ascending and descending, that is, movement in the rolling direction can be reduced. And a bearing mechanism 15 capable of sufficiently restraining movement in the rolling direction, that is, deflection in the lateral direction.
Are provided to the mill housing 12 via the

By disposing a bearing mechanism 15 between the inner housing 11 and the mill housing 12,
Hysteresis of the entire lowering mechanism of the inner housing 11 can be minimized, and when a mechanism for clamping the inner housing 11 with the bearing mechanism 15 is employed, the reaction force in the rolling direction generated from the divided reinforcing rolls is reduced by the inner force. Not only the housing but also the mill housing 12 shown in FIG. 1 can be shared, whereby the inner housing 11 can be made particularly compact.

FIG. 2 shows an example of a rolling mill having a mechanism in which only the upper roll assembly supports the work roll 1 by divided reinforcing rolls divided in the axial direction. Again,
For example, a split roll unit including a load detecting device for the split reinforcing rolls 2C, 2C and a split reinforcing roll pressing device 2C is also a split roll including, for example, a load detecting device for the split reinforcing rolls 3D, 3D and a split reinforcing roll pressing device for 3D. The units are arranged in a common inner housing 11, and the inner housing 11 is a mill housing 12.
Are arranged to be able to move up and down by a mill pressure reduction device provided in the mill housing 12. Needless to say, the same working effects as those described with reference to FIG.

[0017]

By using the sheet rolling mill of the present invention, it is possible to detect and control the sheet crown and shape during rolling with high precision without time delay, and the sheet crown and shape control accuracy of the rolled sheet is dramatically improved. To improve. The plate rolling mill of the present invention is easy to perform maintenance work such as replacing the split reinforcing rolls, etc., and can perform sufficient maintenance without stopping the rolling work for a long time. There is little possibility that excessive force is applied, and the stand of the existing rolling mill can be used.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an example of a sheet rolling mill according to the present invention.

FIG. 2 is an explanatory view of another example of the sheet rolling mill of the present invention.

FIG. 3 is an explanatory view of a sheet rolling mill according to the preceding invention.

[Explanation of symbols]

1: work roll, 2-4, 2'-4 ', 2A-3D: divided reinforcing roll, 5-7 (5'-7'): load detecting device,
8-10 (8'-10 '), 8C, 9D: split reinforcement roll pressing device, 11: inner housing, 12: mill housing, 13: rolled material, 14: mill pressing device,
15: Bearing mechanism.

Continuation of the front page (72) Inventor Daisuke Fujii 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Division (56) References JP-A-5-50109 (JP, A) JP-A-5-245711 (JP, A) JP-A-5-245505 (JP, A) JP-A-5-76902 (JP, A) JP-A-5-69010 (JP, A) A) JP-A-5-154507 (JP, A) JP-A-5-154506 (JP, A) JP-A-6-262214 (JP, A) JP-A-6-262212 (JP, A) JP-A-6 JP-A-6-262210 (JP, A) JP-A-6-262210 (JP, A) JP-A-6-262209 (JP, A) JP-A-6-262208 (JP, A) JP-A-6-262207 (JP, A) JP-A-2-217107 (JP, A) JP-A-3-174905 (JP, A) JP-A-60-196206 (JP, A) JP-A-60-191608 (JP, A) JP-A-60-196 3909 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 13/14 B21B 29/00 B21B 31/02

Claims (2)

(57) [Claims] 1. A mechanism in which at least one of the upper and lower roll assemblies supports a work roll by divided reinforcing rolls divided into three or more in the axial direction. Each divided reinforcing roll has an independent load detecting device. In a plate rolling mill provided with a split reinforcing roll pressing device, each of the split reinforcing roll units each including a split reinforcing roll, a load detection device, and a split reinforcing roll pressing device is disposed in an inner housing common to each split reinforcing roll unit. A plate rolling mill, wherein the inner housing is disposed so as to be able to move up and down by a mill rolling device provided in the mill housing. 2. The mill according to claim 1, wherein the inner housing is provided on a sliding contact surface with the mill housing through a bearing mechanism capable of reducing the movement resistance of the inner housing when ascending and descending and sufficiently restraining the movement in the rolling direction. The plate rolling mill according to claim 1, wherein the plate rolling machine is disposed in a housing.