TW202345991A - Rolling mill, cold rolling method, and method for producing steel sheet - Google Patents

Abstract

A cold tandem rolling mill 1 (rolling mill) comprises a plurality of stands 3 to 6 for rolling a steel sheet 2 (material to be rolled). At least one stand 3 among the plurality of stands 3 to 6 comprises: at least one pair of work rolls 10 (rolling rolls); a work roll chock 20 (roll chock) that supports the work roll 10 rotatably; and a work roll chock liner 30 (roll chock liner) having a first liner plate 36 attached to the work roll chock 20, a second liner plate 38 layered on the first liner plate 36 in a rolling direction X, and an elastic member 37 interposed between the first liner plate 36 and the second liner plate 38.

Description

Rolling mill, cold rolling method and steel plate manufacturing method

The present invention relates to a rolling mill, a cold rolling method and a steel plate manufacturing method.

For example, in production lines such as cold-rolled steel plates, vibrations may sometimes occur due to various factors during the cold-rolling process. The thickness of the steel plate used as the material to be rolled may fluctuate periodically due to this vibration. Therefore, it is important to suppress the vibration when vibration occurs so that it does not affect the material to be rolled.

For example, Patent Document 1 discloses a cold rolling equipment and a cold rolling method that can suppress chattering (vibration) in the horizontal direction due to rolling oil supplied to a stand of a rolling mill. [Prior art documents] [Patent Document]

Patent Document 1: Japanese Patent No. 7020530

[Problem to be solved by the invention] In addition, in this type of rolling mill, for example, in addition to the conventional method of suppressing vibration caused by rolling oil, a method of isolating vibration by installing a liner on a roll chock included in the frame has been proposed. A method of using elastic members such as rubber to suppress vibration during rolling.

However, in a structure in which an elastic member is laminated on a pad attached to the roll chock in the rolling direction, the exposed surface of the elastic member on the opposite side to the roll chock is worn, making it difficult to use industrially.

The present invention was made in view of the above problems, and an object thereof is to provide a rolling mill, a cold rolling method, and a steel plate manufacturing method that can suppress vibration during rolling while suppressing wear of the lining of the roll chock. [Means to solve the problem]

The rolling mill of the present invention is a rolling mill including a plurality of stands for rolling a rolling target material. At least one of the plurality of stands includes: at least a pair of rolling rollers; and a roller chock that can rotate. and a roll chock pad having: a first lining plate installed on the roll chock; and a second lining plate positioned relative to the first lining plate. The layers are laminated in the rolling direction; and an elastic member is sandwiched between the first lining plate and the second lining plate.

Preferably, the roller chock pad including the first lining plate, the second lining plate and the elastic member is provided in the plurality of frames.

Preferably, the first lining plate is fastened to the roller chock via a fastener penetrating in the rolling direction, and the second lining plate and the elastic member are provided with a hole for receiving the fastener. The opening of the head.

The cold rolling method of the present invention includes the step of cold rolling a material to be rolled using the rolling mill.

The steel plate manufacturing method of the present invention includes the step of manufacturing a steel plate as a rolling target material using the cold rolling method. [Effects of the invention]

According to the present invention, by sandwiching and disposing the elastic member between the first lining plate and the second lining plate laminated in the rolling direction, it is possible to suppress the elastic member from being exposed on the side opposite to the roll chock and causing wear. Thereby, it is possible to provide a rolling mill, a cold rolling method, and a steel plate manufacturing method that can suppress vibration during rolling while suppressing wear of the lining of the roll chock.

Hereinafter, exemplary embodiments of the present invention are disclosed. The structure of the embodiment shown below and the functions and effects brought by the structure are examples. The present invention can also be realized by a structure other than the structure disclosed in the following embodiments. In addition, according to the present invention, at least one of various effects (including derivative effects) obtained by utilizing the structure can be obtained.

In this manual, serial numbers are only used to distinguish parts, components, locations, positions, directions, etc., and do not indicate order or priority.

[Embodiment] FIG. 1 is an exemplary and schematic structural diagram of the tandem cold rolling mill 1 according to the embodiment. The continuous cold rolling mill 1 is an example of a rolling mill. In the following description, the steel plate 2 is cited as an example as the rolling target material rolled by the cold tandem rolling mill 1, but it is not limited to this example, and it can also be applied to an aluminum plate or other metal plate. The steel plate 2 is, for example, an electromagnetic steel plate, a stainless steel plate, a high carbon steel plate, or other steel types that are generally prone to vibration.

As shown in FIG. 1 , the continuous cold rolling mill 1 includes, for example, a plurality of stands 3 to 6 for cold rolling the steel plate 2 . The plurality of stands 3 to 6 are arranged along the rolling direction X (transportation direction) of the steel plate 2 . The number of racks 3 to 6 is not limited to four. For example, it may be one, two, three, or five or more.

Each of the plurality of frames 3 to 6 has a pair of work rolls 10 , a pair of intermediate rolls 11 , and a pair of backup rolls 12 . The work roll 10, the intermediate roll 11, and the back-up roll 12 are arranged in the up-and-down direction intersecting the rolling direction X. Each of the stands 3 to 6 is a so-called 6Hi type rolling stand in which an intermediate roll 11 is provided between the work roll 10 and the backup roll 12 .

In the tandem cold rolling mill 1, a tension roll, a deflector roll (not shown), a plate thickness gauge, a shape gauge, etc., which are not shown, are suitably provided between adjacent stands 3 to 6. The structure of the tandem cold rolling mill 1 or the conveyance device of the steel plate 2 are not particularly limited, and known techniques can be appropriately applied.

FIG. 2 is an exemplary and schematic structural diagram of the stand 3 of the tandem cold rolling mill 1 according to the embodiment. As shown in Figure 2, the frame 3 further has, for example, a work roll chock 20, a work roll chock pad 30, an intermediate roll chock 21, an intermediate roll chock pad 31, a back-up roll chock 22, and a back-up roll chock. Liner 32, mill housing 40, etc.

The work roll chocks 20 are provided at both ends of the pair of work rolls 10 in the axial direction (the direction perpendicular to the paper surface of FIG. 2 ). The work roll chock 20 supports the work roll 10 so as to be rotatable about an axis extending in the direction vertical to the paper surface of FIG. 2 . In addition, recessed portions 20 a that are recessed toward the center side (the work roll 10 side) in the rolling direction X are provided at both ends of the work roll chock 20 in the rolling direction X. A work roll chock pad 30 to be described later is arranged in this recessed portion 20a. In this embodiment, the work roll 10 is an example of a roll roll, the work roll chock 20 is an example of a roll chock, and the work roll chock pad 30 is an example of a roll chock pad.

The intermediate roller bearing seats 21 are provided at both ends of the pair of intermediate rollers 11 in the axial direction (the direction perpendicular to the paper surface of FIG. 2 ). The intermediate roller chock 21 supports the intermediate roller 11 so as to be rotatable about the axis. In addition, recessed portions 21 a recessed toward the center side (intermediate roll 11 side) in the rolling direction X are provided at both ends of the intermediate roll chock 21 in the rolling direction X. The intermediate roller chock pad 31 is arranged in the recessed portion 21a.

The backup roller chocks 22 are provided at both ends of the pair of backup rollers 12 in the axial direction (the direction perpendicular to the paper surface of FIG. 2 ). The backup roller chock 22 supports the backup roller 12 so as to be rotatable about the axis. In addition, recessed portions 22 a that are recessed toward the center side (the backup roll 12 side) in the rolling direction X are provided at both ends of the backup roll chock 22 in the rolling direction X. The backup roller chock pad 32 is arranged in the recessed portion 22a.

The rolling mill stand 40 has a pair of side walls 40a and 40b arranged on both sides in the rolling direction X with respect to the work roll chock 20, the intermediate roll chock 21, and the backup roll chock 22. A slight gap is provided between the pair of side walls 40a, 40b and the work roll chock 20, or the intermediate roll chock 21, and the back-up roll chock 22 to facilitate the replacement of each roll chock 20, 21, 22. .

In addition, the rolling mill stand 40 is provided with a plurality of project blocks 41 protruding from the pair of side walls 40 a and 40 b toward the center side (the work roll 10 side) in the rolling direction X. The project block 41 has, for example, a project block pad that is in contact with the work roll chock pad 30 , and absorbs looseness (clearance) between the rolling mill stand 40 and the work roll chock 20 .

For example, the item blocks 41 may be respectively provided between the rolling mill stand 40 and the intermediate roll chock 21 and between the rolling mill stand 40 and the backup roll chock 22 .

FIG. 3 is an enlarged view of the work roll chock pad 30 of FIG. 2 . As shown in FIG. 3 , the work roll chock pad 30 includes, for example, a first lining plate 36 , a second lining plate 38 and an elastic member 37 . The elastic member 37 and the second lining plate 38 are laminated in the rolling direction X with respect to the first lining plate 36 .

The first lining plate 36 is configured in a rectangular plate shape extending along the bottom of the recess 20 a of the work roll chock 20 . The first lining plate 36 is provided with an opening 36 a through which the shaft portion 50 b of the fastener 50 penetrates in the rolling direction X. The fastener 50 is a fixing member such as a bolt or a screw, and fixes the work roll chock pad 30 and the work roll chock 20 . The first lining plate 36 and the second lining plate 38 include, for example, metal materials.

In this embodiment, the thickness W1 of the first lining plate 36 is set to be thicker than the thickness W2 of the second lining plate 38 or the thickness of the elastic member 37 . Specifically, the thickness W1 of the first lining plate 36 is set to about half of the entire thickness of the work roll chock lining 30 , thereby ensuring the rigidity or strength required for fastening with the fastener 50 . In this embodiment, the thickness of the elastic member 37 is set to be substantially the same as the thickness W2 of the second liner 38 .

The second lining plate 38 is located on the side of the first lining plate 36 opposite to the work roll chock 20 in the rolling direction X. The second lining plate 38 is configured in a rectangular plate shape extending along the first lining plate 36 . The second backing plate 38 is provided with an opening 38 a for accommodating the head 50 a of the fastener 50 . The opening 38a is configured as a circular hole (a relief hole) that is larger than the head 50a of the fastener 50, for example.

The elastic member 37 is, for example, anti-vibration rubber, and is located between the first lining plate 36 and the second lining plate 38 in the rolling direction X. The elastic member 37 is configured in a rectangular plate shape extending along the first lining plate 36 , and is then fixed to the first lining plate 36 and the second lining plate 38 , for example. The elastic member 37 can absorb vibration along the rolling direction X by elastically deforming between the first lining plate 36 and the second lining plate 38 .

In addition, the elastic member 37 is provided with an opening 37 a for accommodating the head 50 a of the fastener 50 . The opening 37a is configured, for example, as a circular hole (a relief hole) that is slightly larger than the head 50a of the fastener 50, and is aligned with the opening 38a of the second lining plate 38 in the rolling direction X. In this embodiment, the fastener 50 does not fasten the entire work roll chock lining 30 , but only fastens the first lining plate 36 , thereby utilizing the elastic force of the elastic member 37 to restrain the fastener 50 The tightening is loose.

In this embodiment, the combined thickness of the elastic member 37 and the second lining plate 38 is set to be thicker than the thickness of the head 50 a of the fastener 50 . That is, the thickness of the elastic member 37 and the second backing plate 38 is set to such a thickness that the head 50a of the fastener 50 does not protrude in the rolling direction X from the openings 37a and 38a.

In addition, in this embodiment, the case where the first lining plate 36, the second lining plate 38 and the elastic member 37 are provided in the work roll chock lining 30 is illustrated, but it is not limited to this example and may be provided in the work roll chock lining 30. The intermediate roller chock pad 31 or the backup roller chock pad 32 shown in FIG. 2 . In other words, as long as the first lining plate 36, the second lining plate 38 and the elastic member 37 are provided in at least one of the work roll chock pad 30, the intermediate roll chock pad 31 and the backup roll chock pad 32. Can.

In addition, in this embodiment, the first lining plate 36, the second lining plate 38, and the elastic member 37 are also provided in the other frames 4 to 6 other than the frame 3, for example, the work roll chock pad 30. The structures of the other racks 4 to 6 are substantially the same as the structure of the rack 3 . The number of the frames 3 to 6 provided with the first lining plate 36, the second lining plate 38 and the elastic member 37 is not limited to four, for example, it can be one, two or three.

As described above, in this embodiment, the cold continuous rolling mill 1 (rolling mill) includes a plurality of stands 3 to 6 for rolling the steel plate 2 (rolling target material). Among the plurality of stands 3 to 6 At least one frame 3 includes: at least one pair of work rolls 10 (roller rolls); work roll chocks 20 (roller chocks) rotatably supporting the work rolls 10; and work roll chock pads 30 (roller chock pads) Pad), the work roll chock pad 30 (roller chock pad) has: a first lining plate 36, installed on the work roll chock 20; a second lining plate 38, relative to the first lining plate 36 on the roller The layers are laminated in the rolling direction X; and the elastic member 37 is sandwiched between the first lining plate 36 and the second lining plate 38 .

According to this structure, for example, by sandwiching and disposing the elastic member 37 between the first lining plate 36 and the second lining plate 38 laminated in the rolling direction X, it is possible to suppress the elastic member 37 from interfering with the work roll chock 20 The opposite side (the project block 41 side of the rolling mill stand 40) is exposed and worn. Thereby, it is possible to provide the tandem cold rolling mill 1 , the cold rolling method, and the manufacturing method of the steel plate 2 that can suppress the wear of the work roll chock pad 30 and suppress the vibration during the rolling process.

In addition, in this embodiment, the work roll chock pad 30 including the first lining plate 36, the second lining plate 38 and the elastic member 37 is provided in the plurality of frames 3 to 6.

According to this structure, for example, the elastic member 37 provided in the work roll chock pads 30 of the plurality of stands 3 to 6 can suppress vibration during the rolling process, and thus the thickness of the steel plate 2 can be suppressed more reliably. Periodically fluctuates due to vibration during rolling.

In addition, in this embodiment, the first lining plate 36 is fastened to the work roll chock 20 via the fastener 50 penetrating in the rolling direction X, and the second lining plate 38 and the elastic member 37 are provided with the receiving fastener 50 The opening 38a and the opening 37a of the head 50a.

According to this structure, for example, instead of tightening the entire work roll chock lining 30 , only the first lining plate 36 can be tightened. Therefore, the elastic force of the elastic member 37 can be used to suppress the tightening of the fastener 50 . Firmly loose.

The embodiments of the present invention have been illustrated above. However, the embodiments are merely examples and are not intended to limit the scope of the invention. The embodiments described above can be implemented in various other forms, and various omissions, substitutions, combinations, and changes can be made without departing from the spirit of the invention. In addition, each structure or shape and other specifications (structure, or type, direction, form, size, length, width, thickness, height, quantity, arrangement, position, material, etc.) can be appropriately changed and implemented. [Industrial availability]

According to the present invention, it is possible to provide a rolling mill, a cold rolling method, and a steel plate manufacturing method that can suppress vibration during the rolling process while suppressing wear of the lining of the roll chock.

1: Cold continuous rolling mill (roller mill) 2: Steel plate (rolling material) 3～6:Rack 10: Work roll (roller roll) 11: Intermediate roller 12: Support roller 20: Work roll bearing seat (roller bearing seat) 20a, 21a, 22a: concave part 21: Intermediate roller bearing seat (roller bearing seat) 22: Back-up roller bearing seat (roller bearing seat) 30: Work roll chock lining (roller chock lining) 31: Intermediate roller bearing seat lining 32: Back-up roller bearing seat lining 36: First liner 36a, 37a, 38a: opening 37: Elastic component 38:Second liner 40:Rolling mill stand 40a, 40b: side wall 41: Project block 50: Fasteners 50a:Head 50b: Shaft W1: Thickness of the first lining plate W2: Thickness of the second lining plate X:Rolling direction

FIG. 1 is an exemplary and schematic structural diagram of the rolling mill according to the embodiment. FIG. 2 is an exemplary and schematic cross-sectional view of the frame of the rolling mill according to the embodiment. FIG. 3 is an enlarged view of the roller chock pad of FIG. 2 .

3:Rack

10: Work roll (roller roll)

11: Intermediate roller

12: Support roller

20: Work roll bearing seat (roller bearing seat)

20a, 21a, 22a: concave part

21: Intermediate roller bearing seat (roller bearing seat)

22: Back-up roller bearing seat (roller bearing seat)

30: Work roll chock lining (roller chock lining)

31: Intermediate roller bearing seat lining

32: Back-up roller bearing seat lining

40:Rolling mill stand

40a, 40b: side wall

41: Project block

Claims (6)

A rolling mill includes a plurality of frames for rolling a rolling object material, At least one rack among the plurality of racks includes: at least one pair of rollers; a roll chock rotatably supporting the roll roll; and Roller chock pads with: The first lining plate is installed on the roller bearing seat; a second lining plate laminated in the rolling direction with respect to the first lining plate; and An elastic member is clamped between the first lining plate and the second lining plate. The rolling mill according to claim 1, wherein the roll chock pad including the first lining plate, the second lining plate and the elastic member is provided in the plurality of frames. The rolling mill according to claim 1, wherein the first lining plate is fastened to the roll chock via a fastener penetrating in the rolling direction, The second backing plate and the elastic member are provided with an opening for receiving the head of the fastener. The rolling mill according to claim 2, wherein the first lining plate is fastened to the roll chock via a fastener penetrating in the rolling direction, The second backing plate and the elastic member are provided with an opening for receiving the head of the fastener. A cold rolling method includes the step of cold rolling a rolling target material using the rolling mill according to claim 1. A steel plate manufacturing method including the step of manufacturing a steel plate as a rolling target material using the cold rolling method according to claim 5.