JPH02235510A - Device for correcting shape in multi roll mill - Google Patents

Abstract

PURPOSE:To remarkably effectively correct a shape and to uniformly control the shape by forming each pair of 1st intermediate rolls in contact with each work roll in a special shape and providing a driving means to shift each 1st intermediate roll respectively independently in a lateral direction. CONSTITUTION:Each pair of 1st intermediate rolls 12 in contact with each work roll 11 is formed in the contour shape of sine curve. In correcting the shape of a rolled stock, the 1st intermediate roll 12 in direct contact with a pair of work rolls 11 is shifted by a driving means 15 in a lateral direction. Then, since the 1st intermediate roll 12 has a contour shape of a sine curve, the shape can be controlled uniformly over the full width of the rolled stock. Besides, since the 1st intermediate roll 12 in direct contact with the work roll 11 is controlled, a relaxation action such as in a backup roll crown regulation system is short and the effect is large.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a shape modification device for a multi-high rolling mill. (Prior art) A shape modification device for a multi-high rolling mill that rolls thin steel plates, etc.
Conventionally, there are three types: backup roll crown adjustment type, intermediate roll lateral adjustment type, and intermediate roll pending type.

As shown in FIG. 7, the backup roll crown adjustment type backs up a pair of upper and lower work rolls 2 that directly contact the rolled material 1 with a backup roll 5 via a first intermediate roll 3 and a second intermediate roll 4. In the multi-high rolling mill, the backup roll 5 is divided into a plurality of parts in the lateral direction, and the roll gap between the pair of work rolls 2 is controlled by dividing the backup roll 5 into a plurality of parts in the lateral direction and moving the divided bearings in and out of each roll gap direction. As shown in Fig. 8, the intermediate roll lateral adjustment type uses a first intermediate roll 3 with a taper relief 3a attached to one end in the lateral direction. The shape is corrected by shifting the roll 3 in the lateral direction and controlling the position of the taper relief 3a relative to the rolled material 1.

Furthermore, as shown in FIG. 9, in the intermediate roll pending type, a bending moment is applied to the first intermediate roll 3 by a hydraulic cylinder 6, etc., and the roll gap is controlled through the deflection of the first intermediate roll 3, thereby changing the shape. This is to correct.

(Problems to be Solved by the Invention) Among the conventional shape modification devices, the backup roll crown adjustable type is an actuator with the highest degree of freedom;
Since the backup roll 5 that is farthest from the work roll 2 is controlled, its influence is alleviated while passing through the intermediate rolls 3 and 4, and it cannot be said that it has a sufficient degree of freedom. That is, when looking at the transmission of pressure to the backup roll 5 during rolling, it becomes as shown in FIG. Therefore,
There is a disadvantage that the pressure is greatly relieved by the intermediate roll 3.4.

In addition, in the intermediate roll lateral adjustment type, the first intermediate roll 3 in contact with the work roll 2 is controlled, so the effect is great, but it has the disadvantage that only the ends of the rolled material 10 in the width direction can be corrected. be.

Furthermore, the intermediate roll pending type also has the disadvantage that, like the intermediate roll lateral adjustment type, it only affects the ends in the width direction of the rolled material l. In particular, in the case of a multi-high rolling mill, since the roll length/roll diameter is large, this tendency is stronger than that of a four-high rolling mill.

SUMMARY OF THE INVENTION In view of these conventional drawbacks, it is an object of the present invention to provide a rolled material with a large shape modification effect and to be able to control the shape uniformly over the entire width of the rolled material.

(Means for Solving the Problems) As a means for solving the problem, the present invention includes a pair of work rolls 11 that directly contact the rolled material 10, and each work roll l1 is connected to a plurality of intermediate rolls 12. In a multi-high rolling mill that is backed up by a backup roll 14 via a work roll 13, each pair of first and intermediate rolls 12 in contact with each work roll 11 is formed into a sin curve outline shape, and each of these first intermediate rolls 12 is Drive means l for independently shifting the rolls 12 in the lateral direction
5.

(Function) When modifying the shape of the rolled material 10, the first intermediate roll 12 that is in direct contact with the pair of work rolls 11 is driven 1,000 steps.
5 to shift in the lateral direction. Then, since each first intermediate roll 12 has a sin curved contour shape, it is possible to uniformly control the shape over the entire width of the rolled material 10. Furthermore, since the first intermediate roll 12 that is in direct contact with the work roll 11 is controlled, there is no relaxation effect as in the case of bank-up roll crown adjustment 2, and the effect is great.

(Example) Hereinafter, the present invention will be described in detail with reference to the illustrated example.
The figure is a perspective view showing the concept of the present invention, FIG. 2 is a front view of the intermediate roll, FIG. 3 is a front sectional view of the drive section of the intermediate roll, and FIG. 4 is a sectional view of the same plane. In FIG. 1, 10 is a rolled material, and 11 is a pair of work rolls that directly contact and roll the rolled material 10. On the outside of each work roll 11,
Two first intermediate rolls 12, three second intermediate rolls 13
, and four backup rolls 14 are arranged so as to sequentially rotate in contact with the inner roll. 1st
The intermediate roll 12 is formed into a sinusoidal contour shape, for example, as shown in FIG. It is linked to 15. As shown in FIGS. 3 and 4, the driving means 15 is constituted by a hydraulic cylinder l6, which is attached to a support plate 19 fixed to the working side of the roll cover 17 via a spacer l8. ing. Hydraulic cylinder. da16
The piston rond 20 projects inward from the support plate l9,
A bearing case 23 is connected to the projecting end via a joint 21, a pin 21', and a joint 22, and a small-diameter shaft portion 24 is formed at one end of the first intermediate roll 12 within this bearing case 23.
are fitted and connected via a double row cylindrical roller bearing 25 and a thrust corner bearing 26 so as to be relatively rotatable.

In the above configuration, when correcting the shape of the rolled material 10, the hydraulic cylinder 16 is expanded and contracted, and the work roll 11 is
Shift the first intermediate roll l2 in contact with the lateral direction. Then, each first intermediate roll 12 receives a sine force. - Because of the curved contour shape, the shape can be controlled uniformly over the entire width of the rolled material 10, and since the control is performed by shifting the first intermediate roll 12, the correction effect is great. Note that, since the first intermediate roll 12 is rotatable relative to the hydraulic cylinder 16, it rotates around the axis even when a shift operation is performed.

FIG. 5 shows a specific contour shape of the four first intermediate rolls l2. In this case, among the four first intermediate rolls 12,
A roll is y+=-cosθ, Ball is y2=cos
The θ and C rolls are polished so that y3=cos2θ, and the [)o-rolls are polished so that y, -cos2θ, respectively.

With this configuration, the roll gap between the pair of work rolls 11 is the same as that of the four first intermediate rolls 12, that is, A-
It can be thought of as the complement (multiplyed by -1) of the sum of the D-roll contours, and is expressed by the following equation.

y=(V++)'z+)'go+y
4) Also, shifting each of the A-D rolls in the lateral direction is equivalent to adding a phase difference in the θ direction. Now, assuming the control condition of ``maintaining symmetry between the working side and the driving side,'' rolls A and B and rolls C and D are each θ=0.
Assuming that the phase is shifted in the opposite direction by the same amount around the point .degree., the roll gap y is calculated by the following formula.

y=-(-cos(θ+α) + cos(θ−α)
+ cos (2θ+β) − cos (2θ−β
)) Substituting numerical values for α and β in the above formula and calculating specifically,
As shown in Figure 6. Therefore, as is clear from FIG. 6, by shifting each first intermediate roll 12 in the lateral direction, it is possible to create a variety of shapes including composite shapes.

Note that the present invention is applicable to both a 12-high rolling mill and a 20-high rolling mill.

The drive means 15 may be of a screw type.

(Effects of the Invention) According to the present invention, each pair of first intermediate rolls 12 in contact with each work roll 11 is formed into a sinusoidal contour shape, and each of these first intermediate rolls 12 is independently lateralized. Since the driving means qω is provided for shifting in the direction, the shape modification effect is greater than that of the conventional backup roll crown adjustment type, and moreover, it is possible to control the shape evenly over the entire width of the rolled material 10. .

[Brief explanation of the drawing]

1 to 6 show one embodiment of the present invention, FIG. 1 is a perspective view showing the concept of the present invention, FIG. 2 is a front view of the intermediate roll, and FIG. 3 is a drive section of the intermediate roll. 4 is a sectional view of the same plane, FIG. 5 is an explanatory diagram of the specific shape of each intermediate roll, FIG. 6 is a diagram showing changes in the roll gap depending on the intermediate roll position, and FIGS. 7 and 8. The figure is a front view showing a conventional example, FIG. 9 is a side view of the same, and FIG. 10 is an explanatory diagram of pressure transmission. 10... Rolled material, 11... Work roll, 12...
・First intermediate roll, 13...Second intermediate roll, 14・
... Backup roll, 15... Drive means, 16.
...Hydraulic cylinder. -5'l D roll Is 5 Fig. Dan1k 3rd t2l Fig. 4

Claims (1)

[Claims] (1) Equipped with a pair of work rolls (11) in direct contact with the rolled material (10), each work roll (11) is connected to a backup roll (14) via a plurality of intermediate rolls (12) and (13). In a multi-high rolling mill configured to back up, each pair of first intermediate rolls (12) in contact with each work roll (11) is formed into a sin curve outline shape, and each of these first intermediate rolls (12)
1. A shape modification device for a multi-high rolling mill, characterized in that a drive means (15) is provided for shifting each independently in a lateral direction.