JPH044910A - Roll for rolling mill - Google Patents

Abstract

PURPOSE:To adjust parts where are deformed in recessed shape due to rolling reaction force and to correct the shape of rolled stock which is deformed along the shape of roll by providing plural bearings to slide freely in the axial direction in a hollow-like roll and moving the bearings in the axial direction of roll. CONSTITUTION:Using the roll 28 for rolling mill, hollow-like parts 18, 19, 20 are arbitrarily provided by moving the position of the bearings 15, 16 to optional positions and the places of parts 18, 19, 20 are deformed into a recessed shape. As a result, the rolled stock 29 can be rolled into a projecting shape. Then, the rolled stock 29 can be rolled into a flat shape by controlling the movement of the bearings 15, 16.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application> The present invention relates to a rolling mill roll used in a rolling mill.

<Prior art> The cross-sectional shape of the rolled material 1 rolled by a rolling mill is
As shown in Fig. 6, the shapes are roughly divided into drum-shaped tal, drum-shaped (bl), and complicated shape (cl).The most ideal shape of the rolled material 1 is a perfect rectangular shape (flat shape).

When rolling is carried out in a normal rolling mill, the roll is deflected by the rolling reaction force, resulting in a drum-shaped rolled material 1 shown in Fig. 16 (al).If this is anticipated and the roll crown is slightly bulged, the roll will be flat. It seems likely that a rolled material 1 with a shape can be obtained, but the conditions are within a very narrow range, and the rolled material 1 tends to have a concave shape at the center of the plate, like the drum shape shown in FIG. 16fb).

Moreover, rolled materials with complex-shaped irregularities as shown in FIG. 16 (tel) are also likely to occur. The amount of unevenness is usually ±5 μm or less, and this amount greatly affects the shape of the rolled material 1.

FIGS. 17(al) and 17(b) show a front view and a cross-sectional side view of a rolling mill that is capable of controlling the amount of roll crown.

Work roll 2 and intermediate roll 3 are placed above and below with the rolled material l in between.
and a backup roll 4 are provided. A taper @ TL is formed at one end of the intermediate roll 3, and the upper and lower intermediate rolls 3 are arranged with the taper part TL reversed left and right.

According to this rolling mill, the work roll 2 is
However, since the end of the intermediate roll 3 is formed with a double taper (TL), the end of the work roll 2 is bent in the direction of the intermediate roll 3, and as a result, the center of the four rolls forms a convex crown. do. The amount of crown can be adjusted in seconds by shifting the intermediate roll 3 in the axial direction and changing the length of the contact between the tapered portion TL and the work roll 2.

On the other hand, when the rolled material 5 is narrowed and rolled in a rolling mill in which a work roll 6 and a backup roll 7 are disposed above and below (see Fig. 18), the work roll 6 is deflected due to the rolling reaction force, and the rolled material 5311 part As a result of the drop phenomenon, as shown in FIG.
A so-called edge drop occurs, resulting in a smaller t.

This edge drop phenomenon is an unavoidable problem in the rolling mill shown in FIG. 18 because the edges of the rolled material 5 become free. In the case of hot rolling of thick plates, a method is used in which both ends of the rolled material 5 are rolled in advance using a vertical rolling mill called an edge mill, and both ends are bulged to account for the reduction in plate thickness before rolling. I'm picking it up. However, in the case of thin plate cold rolling, the plate thickness is as thin as 01 to 02 -, and the plate width is 1000 to 20 mm.
Since it is wide at 00m, buckling is likely to occur, making method B ineffective.

Therefore, as a countermeasure against this edge drop, a rolling mill shown in FIG. 17 is used. By using this rolling mill, the deflection of the work roll 2 due to the rolling reaction force is absorbed by the tapered portion TL of the intermediate roll 3, and the work roll 2 becomes concave. As a result, both ends of the rolled material 5 are deformed into a convex shape, and the amount of edge drop is reduced.

<Problems to be Solved by the Invention> By performing rolling with the rolling mill shown in FIG. 17, it is possible to straighten the rolled material 1 shown in FIG. 16 (alibl) and reduce the amount of edge drop. 16th
It is difficult to straighten the rolled material 1 which has irregularities of complicated shape as shown in Fig. Since the NTL is reversed from left to right, the rolled material 5 inevitably has a twisted shape at both ends be, as shown in FIG. Scrap processing is required.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a roll for a rolling mill having shape controllability capable of correcting even a rolled material having a complicated shape into a flat rolled material. Another object of the present invention is to provide a rolling mill orifice that can reduce the amount of edge drop without requiring correction by post-processing.

Means for Solving the Problems> To achieve the above object, a roll for a rolling mill according to the first invention has a roll support shaft that supports a plurality of bearings slidably in the axial direction, and The present invention is characterized in that it includes a bearing driving means that supports the bearing so as to be slidable in the axial direction around the circumference and causes the bearing to slide in the axial direction.

Further, in the rolling mill roll ζ of the second invention for achieving the above object, hollow portions are formed at both ends of the roll, and bearings are supported in the respective hollow portions so as to be slidable in the axial direction of the roll. and a bearing driving means for sliding the bearing in the axial direction. In the rolling mill roll according to the first invention, the bearing driving means moves the bearing in any direction in the axial direction of the roll. By moving the roll to the position, the hollow portion is deformed into a concave shape by the rolling reaction force, and this deformation is transmitted to the rolled material, so that the rolled material deformed along the roll shape is corrected into an arbitrary shape.

In the rolling mill roll according to the second invention, the bearings are moved to arbitrary positions in the hollow parts at both ends of the roll by the bearing driving means, so that the hollow parts can be positioned at the ends of the rolled material regardless of the width of the roll. , the hollow portion is deformed into a concave shape by the rolling reaction force, and this deformation is transmitted to the end of the rolled material, so that the rolled material deformed along the roll shape is corrected into an arbitrary shape.

Embodiment Fig. 1 shows a cross section of the right half of a roll for a rolling mill according to an embodiment of the first invention, and Fig. 2 shows a view taken along the line I-II in Fig. 1. . The roll of this embodiment is symmetrical, so only the right half is shown in FIG. 1, and the left half is omitted.

A coal chock 2 is supported on a rolling mill harassing 11 so as to be vertically movable, and a roll support shaft 13 is rotatably supported on a coal chock 12. Roll Chiwock 1
A hollow spout 14 is rotatably supported in the roller 2, and a roll support shaft 13 is disposed at the axis of the hollow roll 14. Bearings 15 and 16 are provided on the roll support shaft 13.
The inner rings 15a and 16a of the bearing 15. are fitted together so as to be movable in the axial direction. The outer #115b216b of #16 is fitted to the inner circumference of the roll 14 so as to be slidable in the axial direction. Bearing 15°1
The rotation of the inner rings 15a, 16a of the bearings 15, 16 is fixed via a key 17, and the outer rings 15b, 16b+ of the bearings 15, 16 are fitted with the inner circumference of the wheel 14 through a gap of about 0.05a. There is.

By changing the axial positions of the bearings 15, 16, the hollow portions 18, 19, 20 within the roll 14 can be set arbitrarily.

On the other hand, a pedestal 21 is fixed to the rollner 3 hook 12, and the pedestal 21 is provided with hydraulic cylinders 22 and 23 as bearing driving means corresponding to the bearings 15 and 16, respectively, and the cylinder rods of each hydraulic cylinder 22 and 23 are drive plate 24
°25 is fixed. One end of four rods 26 is fixed to the drive plate 24, and the rods 26 pass through the drive plate 25 and the roll lock 12, and the other ends are fixed to the bearing 15. Further, one ends of four rods 27 are fixed to the drive plate 25, and the rods 27 pass through the roll nut 12 and the bearing 15, and the other ends are fixed to the bearing 16. That is, the driving of the hydraulic cylinder 22 causes the bearing 15 to move in the axial direction via the drive plate 24 and the rod 26, and the drive of the hydraulic cylinder 23 causes the bearing 16 to move in the axial direction via the drive plate 25 and the rod 27. .

Note that the bearing driving means is not limited to the hydraulic cylinders 22 and 23, and it is also possible to use a communication mechanism such as a combination of a motor and gears.

The rolling mill roll 2 described above based on FIGS. 3 to 5
The effect when 8 is used as a work roll will be explained.

The state shown in FIG. 3 181 is the position where the hydraulic cylinder 23 is driven to move the bearings 16 toward the center so that they come into close contact with each other, and the hydraulic cylinder 22 is driven to move the bearings 15 to a position where both ends of the rolled material 290 are pressurized. It is being moved to . When rolling is carried out in this state, the hollow portion 19 becomes concave due to the rolling reaction force 9, and the portion opposite the portion 19 of the rolled material 29 becomes convex, as shown in Fig. 3 fb). and rolled. This is suitable for straightening the rolling shown in FIG. 16(C).

The state shown in Fig. 4 fat is the hydraulic shredder 22°23
is driven to move the bearings 15 and 16 toward the center so that all the bearings 15 and 16 are brought into close contact with each other at the center, so that the hollow portions 18 are located at both ends of the rolled material 29.

When rolling is carried out in this state, the hollow portions 18 on both ends become concave due to the rolling reaction force, and as shown in FIG. It is rolled into a shape.

This is suitable for straightening the rolling shown in FIG. 16 fat.

In the state shown in FIG. 5(a), the hydraulic cylinders 22 and 23
The bearings 15 and 16 are brought into close contact with each other by driving the rolled material 2.
Both ends of the rolled material 29 are moved to a pressurizing position so that a hollow portion 20 is located in the center of the rolled material 29.

When rolling is carried out in this state, the hollow part 20 at the center becomes concave due to the rolling reaction force, and as shown in FIG. Be rolled into a shape.

This can be applied to the rolling straightening shown in FIG. 16(b).

By using the rolling mill roll 28 described above, the bearing 15
, 16 to an arbitrary position to form hollow part 1.
8, 19, and 20 can be provided arbitrarily, and the rolling reaction force deforms the portions 18, 19, and 20 into a concave shape, and as a result, the rolled material 29 can be rolled into a convex shape. Therefore, by controlling the movement of the bearings 15 and 16, the rolled material 29 of any shape can be rolled into a flat shape.

In the above embodiment, an example was explained in which the rolling mill roll 28 was used as a work roll, but as shown in FIG. As shown in FIG. 7, it is also possible to use it as the middle +m roll of a large roll type rolling mill equipped with a work roll 30 and a backup roll 31.

Next, a rolling mill roll according to the second invention will be explained based on FIGS. 8 and 9.

FIG. 8 shows a cross section of the right half of a roll for a rolling mill according to an embodiment of the second invention, and FIG. 9 shows an enlarged view of the bearing. Incidentally, since the roll of the embodiment is symmetrical, only the right half is shown in FIG. 8, and the left half is omitted.

A roll chock 52 is supported in a housing 51 of the rolling mill so as to be movable up and down, and a roll 53 is supported on the roll chock 52.
is rotatably supported. Hollow holes 54 are formed at both ends of the roll 53, and bearings 55 are fitted into each hollow portion 54 so as to be slidable in the axial direction.

By changing the axial position of the bearing 55, the hollow portion 54
The hollow portion 56 inside can be set arbitrarily.

On the other hand, a pedestal 57 is fixed to the roll chock 12 , a hydraulic cylinder 58 as a bearing driving means is provided on the pedestal 57 , and a cylinder rod 59 of the hydraulic cylinder 58 is fixed to the bearing 55 . In other words, the bearing 55 is moved in the axial direction by driving the hydraulic cylinder 58.

The detailed structure of the bearing 55 will be explained based on FIG. 9.

Two bearing members 61 are fitted to the tip of the cylinder rod 59 via a spacer 60 having a diameter smaller than 1, and the bearing members 61 are fixed to the cylinder rod 59 by set screws 62 and 63.

As the bearing 55, a hollow portion 6 is provided in the spacer 60.
4).

In addition, as shown in FIG. 10, it is also possible to fit two sets of bearings 55 into the hollow part, connect a hydraulic cylinder 58 to each bearing 55, and set the state of the hollow part 56 arbitrarily. be.

The operation when the above-mentioned rolling mill roll 65 is used as a work roll will be explained based on FIGS. 11 to 13.

In the state shown in FIG. 11, the hydraulic cylinder 58 is driven to move the bearing 55 toward the end of the hollow portion 54, and the hollow portion 56 is formed at a position facing both ends of the rolled material 66. There is. When rolling is performed in this state, the hollow portion 56 becomes concave due to the rolling reaction force, and the rolled material 66 is rolled with both ends convex, thereby reducing edge drop.

The state shown in FIG. 12 is a case where the plate width of the rolled material 66 is wider than that shown in FIG. 11 (the plate width changes from B to above). The hydraulic cylinder 58 is driven to move the bearing 55 toward the axial center of the hollow portion 54, thereby forming a hollow portion 56 on the end side at a position facing both ends of the rolled material 66. When rolling is performed in this state, the rolled material 66 is
(Both ends are convex and compressed, reducing edge drop.

The state shown in FIG. 13 is a case where the plate width of the rolled material 66 is intermediate between that shown in FIG. 11 and that shown in FIG. 12 (plate width B1.l).

The hydraulic cylinder 58 is driven to move the bearing 55 toward the axial center of the hollow portion 54, and hollow portions 64 of the bearing 55 are formed at positions facing both ends of the rolled material 66. When rolling is performed in this state, the hollow portion 6 is formed due to the rolling reaction force.
4 has a concave shape, and both ends of the rolled material 66 are rolled to have a convex shape, thereby reducing edge drop.

By using the rolling mill roll 65 described above, the bearing 55
Move the position of the hollow part 56.6 to an arbitrary position.
4 can always be opposed to both ends of the rolled material 66 regardless of the plate width B, and the rolling reaction force deforms the portions 56 and 64 into a concave shape, resulting in the both ends of the rolled material 66 becoming convex. It can be rolled into Therefore, by controlling the movement of the bearing 55, edge drops can be reduced regardless of the width of the rolled material.

In the above embodiment, an example was explained in which the rolling mill roll 65 was used as a work roll, but as shown in FIG. As shown in FIG. 15, it is also possible to use it as an intermediate roll in a stride-type rolling mill equipped with a work roll 67 and a backup roll 68. In addition, 69 in FIGS. 14 and 15 is a work roll 67.
The drive motor 70 is a speed reducer.

<Effects of the Invention> The roll for a rolling mill of the present invention has a plurality of bearings slidably provided in the hollow roll in the axial direction, and by moving the bearings to any position in the axial direction of the roll, the rolling reaction force is applied. The shape of the rolled material that is deformed along the roll shape is corrected by adjusting the portion that deforms into a concave shape. As a result, rolled material of any shape can be easily straightened into a flat shape, and quality can be improved.

In addition, the roll for a rolling mill of the present invention has bearings slidably provided in the hollow portions at both ends, and by moving the bearings, the ends of the rolled material are positioned in the hollow portions, and the rolled material is shaped into a concave shape by the rolling reaction force. The deformed portion is made to correspond to the edge of the rolled material, and the amount of edge drop at the end of the rolled material is reduced regardless of the plate width. As a result, it is possible to perform rolling with a small amount of edge drop at all times, improving production efficiency and ensuring stable rolling.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the right half of a roll for a rolling mill according to an embodiment of the first invention, FIG. 2 is a view taken along the line ■-■ in FIG.
3 to 5 are action explanatory views of the rolling mill roll of the first invention; FIGS. 6 and 7 are front views of the rolling mill roll of the first invention when applied to another rolling mill; FIG. 8 is a sectional view of the right half of a roll for a rolling mill according to an embodiment of the second invention;
The figure is an enlarged view of the bearing, FIG. 10 is a sectional view showing another example of the bearing, FIGS. 11 to 13 are explanatory views of the operation of the rolling mill roll of the second invention, and FIGS. 14 and 15. 16 is a front view when the roll for a rolling mill of the second invention is applied to another rolling mill, FIG. 16 is a sectional view showing the shape of a rolled material rolled in a general rolling mill, and FIG. 17 (al, ( bi is a front view and a cross-sectional side view of a rolling mill in which the amount of roll crown can be adjusted by the printing section;
FIG. 8 is a front view of a four-high rolling mill, and a sectional view of a rolled material in which edge drops have occurred compared to FIGS. 19 and 20. In the drawing, 13 is a roll support shaft, 14 is a roll, 15.16 is a bearing, 22.23 is a hydraulic cylinder, 28 is a rolling mill roll, 53 is a roll, 54 is a hollow part, 55 is a bearing, 58 is a hydraulic cylinder , 65 is a roll for a rolling mill.

Claims (2)

[Claims] (1) A plurality of bearings are supported slidably in the axial direction on a roll support shaft, the bearings are supported slidably in the axial direction on the inner periphery of a hollow roll, and the bearings are slidably supported in the axial direction. A roll for a rolling mill, characterized in that it is equipped with a bearing drive means for performing the following steps. (2) Bearing driving means for forming hollow portions at both ends of the roll, supporting bearings in the respective hollow portions so as to be slidable in the axial direction of the roll, and causing the bearings to slide in the axial direction. A roll for a rolling mill characterized by the following features: