JPH02137603A - Rolling mill for shape control - Google Patents

Abstract

PURPOSE:To facilitate flatness control for a rolled stock and to reduce the number of rolls by supporting a work roll by a intermediate and horizontal rolls, supporting the intermediate roll by segmented reinforcing rolls, and advancing and retreating the reinforcing rolls. CONSTITUTION:At least one of work rolls 1, 2 is supported by an intermediate roll 3 and segmented reinforcing rolls 5. A tangential force acting on the roll 1 is supported by strip segmented rolls 7 through a horizontal supporting roll 6. The rolls 5 are supported by bearing boxes 22 through rolling bearings 21 and the boxes 22 are supported by wedges 24, 25 in a supporting beam 9A. The wedge 24 drives a worm wheel 28 by use of a motor 26 to advance and retract the rolls 5 against an intermediate roll 4. The rolls 5 slant in accordance with deflection of the roll 4 to adjust their contacting faces. Hence, a thin stock or a hard stock is rolled by work rolls of a small diameter.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a shape control rolling mill that rolls a plate material evenly, and in particular, shape control rolling using small diameter work rolls suitable for rolling thin or hard materials. Regarding machines.

[Conventional technology]

A rolling mill using conventional small-diameter work rolls was developed in Japanese Patent Application Laid-open No. 1983-
As described in No. 42103 and Japanese Unexamined Patent Publication No. 60-6206, each work roll is supported by two intermediate rolls, and these two intermediate rolls are supported by at least three rows of divided rolls. Reinforcement I: Supported with '7-ru.

Since such rolling mills use small diameter work rolls,
It is possible to suppress the increase in rolling load, and it is possible to roll thin or hard materials. These rolling mills are called cluster mills because one work roll is supported by a large number of roll groups as described above.

In the rolling mill described in JP-A-59-42013, etc., a large number of divided reinforcing rolls are configured to be movable in the direction of the rolled material by rotating an eccentric sleeve. This type of rolling mill is advantageous in rolling the plate while maintaining its flatness well since the reduction amount w1 can be adjusted, and this type of rolling mill is called a shape control rolling mill.

Furthermore, in the rolling mill described in JP-A No. 60-6205, the split reinforcing rolls in each row are arranged alternately with respect to the split reinforcing rolls in the adjacent row, and the shape of each split roll is drum-shaped. Roll marks caused by contact between the split reinforcing roll and the intermediate roll are reduced.

On the other hand, as shape control rolling machines that do not use small-diameter work rolls, Japanese Patent Application Laid-Open Nos. 60-60 13040993 and 60-130
No. 410 describes a four-high rolling mill in which the reinforcing roll supporting one of the work rolls is a split roll so that the rolling reduction can be adjusted.

[Problem to be solved by the invention]

However, JP-A-59-42103 and JP-A-6
A rolling mill using a conventional small-diameter work roll described in No. 0-6206, etc. is called an "R class mill".
Too many rolls are required to support the working rolls of books. That is, at least two intermediate rolls and three rows of split reinforcing rolls are required. The reason is as follows. In other words, in this type of raster mill, as mentioned above, a thin and hard material is rolled, so a work roll with an extremely small diameter is used, or a work roll with such a small diameter is used to transmit driving power. Due to the low torsional stiffness, the intermediate rolls are usually driven and power is transmitted to the work rolls by frictional force.

Therefore, a tangential force is applied to the work roll in the horizontal direction, causing the roll to deflect in this direction. To prevent this, at least two intermediate rolls are required, and at least three rows of split reinforcing rolls are required to support the two intermediate rolls, resulting in a large number of roll groups.

Therefore, conventional rolling mills require a large number of rolls;
There were problems such as increased equipment costs and poor maintainability.

Also, JP-A-60-130409 and 6013041
In the shape control rolling mill described in No. 0, the work rolls are directly supported by split rolls, and the structure is simple, but it has the following drawbacks. That is, since the split reinforcing roll is brought into direct contact with the work roll, when the split roll is moved back and forth relative to the work roll to correct the shape, discrepancies such as placement will inevitably occur between adjacent split rolls. Streaks or roll marks appear on the work roll, degrading the quality of the product. Further, the target is a work roll that is not small in diameter, and if the work roll is made small in diameter, it will bend in the horizontal direction for the reasons mentioned above. Therefore, it is not suitable for rolling thin or hard materials.

An object of the present invention is to provide a shape control rolling machine that is capable of rolling thin or hard materials using small-diameter work rolls, and that reduces the number of rolls used as much as possible while controlling the shape of the plate to make it more flat. That's true.

[Means to solve the problem]

The above purpose is to
at least one work roll is supported by one intermediate roll and horizontally supported by a horizontal support roll, and the intermediate roll is supported by a large number of divided reinforcing rolls,
Moreover, this is achieved by configuring at least one of these divided reinforcing rolls to be able to move forward and backward with respect to the intermediate roll. The number of rows of split reinforcing rolls is 1 or 2.

[Effect]

In the present invention configured in this way, the small-diameter work roll is supported in the horizontal direction by the horizontal support roll, and the tangential force caused by driving the intermediate roll is maintained. Therefore, only one intermediate roll is required to support the work roll. When the plate width is narrow, the body length of the work roll may be short, so horizontal deflection becomes slight, and the horizontal support roll may be omitted, and only one intermediate roll is required. Also, the intermediate roll may be supported by a large number of split reinforcing rolls, or since there is only one intermediate roll, there may be one or two rows of split reinforcing rolls, and some of these split reinforcing rolls may be moved forward and backward in the direction of the intermediate roll. hand,
By controlling the deflection curve of the intermediate rolls and ultimately of the work rolls, the flatness of the rolled material can be well controlled.

Furthermore, since the work roll is not directly supported by the split reinforcing rolls, the work rolls are not streaked by the split rolls, and the quality of the product can be improved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3C.

In FIG. 1, the shape control rolling mill of this embodiment has a pair of upper and lower small-diameter work rolls 1.2.
Accordingly, the rolled material 3 moving in the direction of the arrow is rolled. The present invention is implemented on the upper work roll 1 of the work rolls 1 and 2.

That is, the rolling load applied to the upper work roll 1 is supported by one intermediate roll 4 and a large number of divided reinforcing rolls 5 arranged in one row. Furthermore, since the rolling power is applied by driving the intermediate roll 4, a tangential force directed leftward in the figure is applied to the work roll 1. This tangential force is supported by the hybrid dividing roll 7 via the small diameter horizontal support roll 6. The hybrid dividing roll 7 is supported by a bearing stand 8, which is connected to a stand 9.
It is supported by a horizontal support beam 10 extending over the

The upper work roll 1 is supported by a bearing box 11, and the bearing box 11 is lifted upward by a cylinder 13 built into the project block 12, and this force is also transmitted to the intermediate roll 3. The intermediate roll 3 is supported by a bearing box 14.

Further, as shown in FIG. 2, the intermediate roll 3 is connected to a motor (not shown) via a spindle 15 and is driven.

On the other hand, in this embodiment, five divided reinforcing rolls 5 are provided for one intermediate roll 4, as shown in FIG.

The divided reinforcing rolls 5 are each supported by a bearing box 22 via a rolling bearing 21 on a shaft 20, and the bearing box 22 is connected to the saddle portion 2.
3, and the surface shape of the saddle portion 23 is a shape that can be tilted at least in the axial direction of the shaft 20, such as a cylindrical surface or a spherical surface. The bearing box 22, except for both sides, is located on the saddle 23 and supported in the upper support beam 9A of the stand 1 by two wedges 24, 25 inserted in opposite directions.

The upper wedge 24 is moved in and out to the left and right by driving a worm wheel 28 in the case 27 by a motor 26, thereby rotating a screw 29. That is, this operation causes the divided roller 5 to move forward and backward relative to the intermediate roll 4.

On the other hand, the wedges 24 and 25 are not installed on the split reinforcing rolls 5 at both ends, and liners 30 are provided instead, and the positions of these two rolls 5 are used as reference points when adjusting the forward and backward movement of the split reinforcing rolls 5, which will be described later. Ru.

Further, the bearing box 22 is lifted upward by a rod 32 via a pin 31, and the rod 32 is supported on the stand 9 by a spring 33 and a washer 34.

Adjustment of the advance and retreat of the split reinforcing roll 5 with respect to the intermediate roll 4 is as follows:
This is carried out as shown in FIGS. 3A to 3C.

FIG. 3A shows an example in which the central roll 5 is retracted with respect to the intermediate roll 4 so as to form a convex shape with respect to the split reinforcing rolls 5 at both ends shown in a satin pattern. FIG. 3B shows an example in which the concave curve is controlled, and FIG. 3C shows an example in which the quarter portion is adjusted. As a result, the middle elongation can be corrected in the example shown in FIG. 3A, the edge elongation can be corrected in the example shown in FIG. 3B, and the quarter elongation can be corrected in the example shown in FIG. 3C. In this manner, in this embodiment, the flatness of the rolled material 3 can be controlled to be corrected by adjusting the forward and backward movement of the split reinforcing rolls 5.

By the way, by adjusting the advance and retreat of the split reinforcing roll 5 with respect to the intermediate roll 4 as described above, the intermediate roll 4 is bent in various curved shapes corresponding to the adjustment. At this time, in this example,
As mentioned above, since the saddle portion 23 of the bearing box 22 is shaped to be able to tilt at least in the axial direction, the split reinforcing roll 5 tilts in accordance with the deflection of the intermediate roll 4, and the contact surface is adjusted to fit smoothly. be adjusted. This makes it possible to prevent roll flaws from occurring due to the split roll 5 coming into contact with the intermediate roll 4.

In order to enable the split reinforcing roll 5 to tilt, the curved shape of the saddle portion 23 is stopped, that is, its surface is made flat, and instead of the bearing 21, a self-aligning type rolling bearing such as a spherical rolling bearing is used. You can.

The above is the explanation for the upper work roll 1 side, but for the lower work roll 2, there is one intermediate roll 4 that supports the rolling load.
0. Providing a horizontal support roll 41, a short body split roll 42, a bearing stand 43, and a horizontal support beam 44 to support the driving tangential force; providing a bearing box 45, a project block 46, and a cylinder 47 for the work roll 2; , the provision of a bearing box 48 and a spindle 49 for the intermediate roll 40 is the same as that for the upper work roll 1.

However, the intermediate roll 40 is supported by one solid, integral reinforcing roll 50.

This reinforcing roll 50 is supported by a bearing box 51.
1 is raised and lowered by a hydraulic lowering device consisting of a cylinder 52 and a piston 53, and controls the plate pressure of the rolled material 3.

As described above, in this embodiment, since the small-diameter work roll 1 is supported in the horizontal direction, only one intermediate roll 4 is required, and only one row of split reinforcing rolls 5 that can advance and retreat from the intermediate roll 4 is arranged. , it is possible to control the flatness of the rolled material. That is, the number of rolls used can be significantly reduced compared to conventional devices.

In addition, when there are many rows of split reinforcing rolls that move forward and backward relative to the intermediate roll, it is difficult to precisely adjust all the split rolls, and errors in contact between each roll occur, deteriorating accuracy. In this embodiment, the number of divided reinforcing rolls 5 that move forward and backward with respect to the intermediate roll 4 is only one row.
Flatness Shape Control 2 The number of objects to be controlled, that is, rolls 5, is small, accurate forward and backward adjustment is possible, and rolled material with good flatness can be produced.

Another embodiment of the present invention will be described with reference to FIG.

In this embodiment, the vertical work 1':! - This is an example in which both rolls 1 and 2 are supported by split reinforcing rolls, and in the figure, the split reinforcing roll for lower work roll 2 has the same structure as split reinforcing roll 5, and a subscript A is added to the number 5. , and components related to the split reinforcing roll 5A are similarly given the subscript A.

In general, it is not necessary to provide separate work rolls 5, 5A for each of the lower work rolls 1.2 and to perform the control as shown in FIGS. 3A to 3C; Although it is possible to sufficiently control the flatness correction of the rolled material 3 by performing it only on one side as shown in FIG. It is sufficient to control both the upper and lower work rolls 1°2.

Still another embodiment of the present invention will be described with reference to FIG. In this embodiment, the present invention is implemented using only the upper work roll 2 as a small-diameter roll, and the lower work roll 60 is an example of a 5-high rolling mill using a normal large-diameter roll, and the stand 61 is also shaped accordingly. ing.

Naturally, in this embodiment, the rolling load is larger than when using small diameter work rolls on both sides as in the embodiment shown in FIG. There is an advantage that the structure is simplified since no rolls are required.

Still another embodiment of the present invention will be described with reference to FIG. In this embodiment, the split reinforcing roll supporting the intermediate roll 4A is
Make two rows of rolls 5B and 11-roll 5C, and middle roll 4A.
A small-diameter intermediate roll is used. The split reinforcing rolls 5B, 5C are supported by a common bearing box 70, and the bearing box 70 is supported on the upper support beam 72 of the stand 71 by wedges 24, 25, similar to the bearing box 22 of the first embodiment. .

In a rolling mill that uses small-diameter work rolls, tangential force is also applied to the intermediate roll to drive the intermediate roll, but if two rows of split reinforcing rolls 5B and 5C are used as in this embodiment, the tangential force will cause the intermediate roll to The bending deformation occurring in the intermediate roll 4A can be prevented, and therefore the intermediate roll 4A can be made thinner. By making the intermediate roll 4A thinner in this way, the third A
Split reinforcing rolls 5B, 5 as shown in Figures to Figure 3C
The deformation control of the intermediate roll shaft by advancing and retracting C can be carried out to a greater extent, and the shape control ability can be improved.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments and can be modified in various ways within the spirit thereof. Some possible variations will be explained below.

(1) In the embodiment shown in FIG. 1 etc., the horizontal support roll 6 that supports the horizontal load of the work roll is provided, but
When the plate width is narrow, the body length of the work roll can be shortened, so the horizontal deflection becomes slight, and even without the horizontal support roll 6, the split reinforcing roll 5 is used as shown in FIGS. 3A to 3C. Such control is possible, and the effects of the present invention can be obtained.

(2) In the embodiment shown in FIG. 1 etc., m machines ill! 24
25 was used to adjust the forward and backward movement of the split reinforcing roll 5 with respect to the intermediate roll 4, but this may of course be done using an eccentric shaft such as that conventionally used in cluster mills. Alternatively, a gear reducer may be installed on the two sides of the bearing box 22, or a hydraulic cylinder or the like may be installed.

(3) In the embodiment shown in FIG. 1, the split reinforcing rolls 5 at both ends
was used as a support structure that does not advance or retreat, and this was used as a reference for adjusting the advance or retreat of the other split reinforcing rolls 5.
Two rolls may be fixed and X-standard may be used. Moreover, it goes without saying that all the divided reinforcing rolls 5 may be moved forward and backward.

It should be noted that it is clear that the number of split reinforcing rolls is not limited to five, and may be larger or smaller than this.

(4) In order to further reduce the damage caused by the split reinforcing roll 5 to the intermediate roll 4, the intermediate roll 4 may be given an ellipse by cyclically moving in the axial direction, or the wear of the work roll may be dispersed. Moving the work roll cyclically in the same way is effective in further enhancing the effects of the present application.

〔Effect of the invention〕

According to the present invention, one intermediate roll or one intermediate roll and one horizontal support roll is provided for one work roll, and one or two rows of divided reinforcing rolls that can move forward and backward with respect to this intermediate roll are provided. Because of this arrangement, thin or hard materials can be rolled using small diameter work rolls, and the flatness of the rolled material can be controlled, so the number of rolls used can be significantly reduced. Further, since the work roll is not directly supported by the split reinforcing roll, the quality of the product can be improved.

Furthermore, since the number of rows of split reinforcing rolls that move forward and backward with respect to the intermediate roll can be reduced, the number of objects to be controlled is reduced, and highly accurate forward and backward adjustment is possible, making it possible to produce rolled material with good flatness.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of essential parts of a shape-controlled rolling mill according to an embodiment of the present invention, FIG. 2 is a central vertical cross-sectional view of the rolling mill shown in FIG. 1, and FIG. C is a diagram showing an example of advancing and retreating adjustment of the split reinforcing rolls of the same rolling mill, and FIG. 4 is a longitudinal cross-sectional view of the main part of a shape control rolling mill according to another embodiment of the present invention.
FIG. 5 is a vertical cross-sectional view of a main part of a shape-controlled rolling mill according to still another embodiment of the present invention, and FIG. 6 is a longitudinal cross-sectional view of a main part of a shape-controlled rolling mill according to still another embodiment of the present invention. It is. Explanation of symbols 1.2...Work roll 3...Rolled material 4...Intermediate roll 5; 5A; 5B, 5C...Divided reinforcement roll 6...Horizontal support roll 23...Saddle portion 24. 25... Wedge applicant Hitachi, Ltd. Agent Patent attorney Kasuga Yuki 1.2-m = Work roll 3 - Rolled material 4 - Intermediate roll 5; 5A; 5B, 5C - One-piece reinforcing roll 6- −
-Horizontal support roll 23-m-Saddle section 24.25-11 wedge Fig. 6

Claims (5)

[Claims] (1) At least one of the two work rolls that roll the plate material is supported by one intermediate roll and supported in the horizontal direction by a horizontal support roll, and this intermediate roll is divided into one Supported by a large number of reinforcing rolls in the column,
Moreover, the shape control rolling mill is characterized in that at least one of these divided reinforcing rolls is configured to be able to move forward and backward with respect to the intermediate roll. (2) In the shape control rolling mill according to claim 1, the 2
The book work rolls have approximately the same diameter, and one work roll is supported by the intermediate roll, horizontal support roll, and split reinforcing roll, and the other work roll is supported by one intermediate roll and an integrated reinforcing roll. A shape control rolling mill characterized by: (3) A shape-controlled rolling mill according to claim 1, wherein the split reinforcing roll is supported so as to be tiltable in the axial direction. (4) A shape-controlled rolling mill according to claim 1, characterized in that the number of rows of the split reinforcing rolls is two. (5) Of the two small-diameter work rolls that roll the plate material, at least one small-diameter work roll is supported by one intermediate roll, and this intermediate roll is supported by a large number of divided one or two rows. A shape control rolling mill characterized in that it is supported by reinforcing rolls and is constructed such that at least one of these split reinforcing rolls can move forward and backward relative to the intermediate roll.