JPS6355364B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-high rolling mill having a function of controlling the shape of rolled material.

In order to obtain a rolled product with a good shape and little change in thickness, especially in the width direction, it is necessary to minimize the deformation of the work rolls due to rolling loads, etc., and to increase the correction ability by roll bending. is important.

However, conventional multi-high rolling mills are only equipped with a roll bending device in the vertical direction, so the amount of crown correction of the rolls is small and only a simple parabolic shape is corrected. The ear elongation and middle elongation shape could be corrected.

Therefore, recently, in multi-high rolling mills, work rolls (if intermediate rolls are provided, intermediate rolls can be used)
by appropriately shifting the work roll in the direction along the rolling line with respect to the back-up roll, so that the work roll is bent so as to escape in the shifting direction during rolling,
A lateral back-up roll is provided at a position separated by a predetermined distance in the direction in which the work rolls are displaced from the work rolls, which are displaced appropriately in the direction along the rolling line, and the workpiece is provided in a manner appropriately displaced in the direction along the rolling line. An intermediate lateral roll is provided between the roll and the lateral back-up roll so as to be in contact with both of these rolls, and the lateral back-up roll is moved toward the work roll provided with an appropriate shift in the direction along the rolling line, thereby rolling the work roll. It has been considered that the shape of the rolled material can be controlled by adjusting the deflection, and in this way it is possible to give the work roll a deflection other than a simple parabola, making it possible to control the shape of a wide range of rolled materials. There are some advantages.

However, such an advantage can only be achieved when the axis of the lateral intermediate roll is located at an appropriate position, that is, when it is located on the line connecting each axis of the work roll and the lateral back-up roll. is not in the correct position,
Work roll deflection cannot be adjusted accurately.

In view of the above, the present invention allows the axial center of the lateral intermediate roll to move to an appropriate position even if the diameter of the work roll increases or decreases and the axial center of the work roll or intermediate roll changes. It is possible to position the axial center of the lateral intermediate roll on the line connecting the axial center and the axial center of the lateral back-up roll, making it possible to accurately adjust the deflection of the work roll and controlling the shape of a wide range of rolled materials. This was made in order to provide a multi-high rolling mill in which the work roll or the intermediate roll is appropriately shifted in the direction along the rolling line with respect to the back-up roll, and the work roll or the intermediate roll is appropriately shifted in the direction along the rolling line. A lateral back-up roll is provided at a position separated by a predetermined distance in the direction in which the roll is shifted, and a lateral back-up roll is provided between the roll that is appropriately shifted in the direction along the rolling line and the lateral back-up roll so as to be in contact with both of these rolls. In a multi-high rolling mill with a shape control function provided with lateral intermediate rolls, guides are provided at both ends of the rolls, which are appropriately shifted in the direction along the rolling line, to guide the blocks in the circumferential direction around the axis of the rolls. The lateral intermediate roll is supported by an arm which is provided with an axle box having a section, and which is provided on an arm body so that the block can be moved in a direction toward and away from the guide section, and the arm body is attached to a lateral back-up roll shaft. The gist of the present invention is a multi-high rolling mill having a shape control function, characterized in that the arm is equipped with a device for rotating the arm around the axis of a lateral back-up roll.

Embodiments of the present invention will be described below with reference to the drawings.

1 is an upper work roll, 3 is an upper back up roll that supports the upper work roll 1, and 4 is a lower back up roll. , 4 is provided so that its axis is located at a distance α in the downstream direction of the rolling line P (the flow direction of the rolled material is indicated by A) from the rolling line F connecting the axes of the lower work rolls 2 and 4. An intermediate roll 5 is provided between the lower back up roll 4 and in contact with both of these rolls. When the rolled material is rolled in this state, the lower work roll 2 is bent so as to escape downstream along the rolling line.

In order to perform shape control using this deflection,
A lateral back up roll 10 is provided at a certain distance downstream from the lower work roll 2, and a lateral intermediate roll having the same length as the lower work roll 2 is provided between the lower work roll 2 and the lateral back up roll 10. 11 is provided so as to be in contact with both of these rolls.

The lateral back-up roll 10 is formed by dividing the trunk section in the axial direction, and includes a plurality of rolls 12.
are fixed to a shaft 13 at intervals, the shaft 13 is supported by a bearing member (saddle) 14, and the bearing member 14 is fixed to a support member 15 fixed to a housing 16.
A hydraulic cylinder 17 is disposed on the beam 18 so as to be movable in the direction along the rolling line P, and moves the bearing member 14 toward the lower work roll 2 to adjust the deflection of the lower work roll 2. Both ends of beam 18 are connected to housing 16.

In the multi-high rolling mill configured as described above, an axle box 21 is provided at both ends of the lower work roll 2 with a stepped portion 20 having a curved guide surface 19 with the axial center position of the lower work roll 2 as the radial center. A block 22 is provided and has a curved surface adapted to the guide surface 19.
a groove 23 that guides the lower work roll 2 in a direction toward and away from the axis of the lower work roll 2, and a lateral intermediate roll 11.
The arm body 2 is provided with a groove 25 for guiding the axle box 24 in a direction toward and away from the axis of the lower work roll 2.
6 are attached to both shaft ends of the lateral backup roll 10, the block 22 is fitted into the groove 23 with its curved surface facing the step 20, and the spring presses the block 22 against the step 20. 27 and a connecting member 28 for preventing the block 22 from falling out of the groove 23 is provided at a required position. Further, a fluid pressure cylinder 29 for rotating the arm body 26 about the axis of the lateral backup roll 10 is provided on the beam 18. The groove 25 that guides the shaft box 24 of the lateral intermediate roll 11 is
When the block 22 is pressed against the stepped portion, the lower work roll 2 and the lateral back up roll 1
The lateral intermediate roll 11 is provided so that its axis can be positioned on a line 30 connecting the respective axes of 0.

By making the arm main body 26 support the block 22 as described above, the arm 31
form.

In order to control the shape of the rolled material, a lateral intermediate roll 11 and a lateral back up roll 10 are used.
When setting the arm body 26 to the state shown in FIG. It moves in a direction approaching the roll 2 and brings the lateral intermediate roll 11 into contact with the lower work roll 2.
At this time, the block 22 is pressed against the guide surface 19 by the force of the spring 27, and the axial center of the lateral intermediate roll 11 comes to be located on the line 30 connecting the respective axes of the lower work roll 2 and the lateral back-up roll 10. .

When controlling the shape of the rolled material, the pressing force of the lateral intermediate roll 11 is adjusted via the lateral back-up roll 10 by operating the fluid pressure cylinder 17, and the horizontal deflection of the lower work roll 2 is adjusted. At this time, if the lateral back up roll 10 is strongly pressed against the lateral intermediate roll 11, the gap between the upper and lower work rolls 1 and 2 in that area will be reduced, and conversely, if the pressing force of the lateral back up roll 10 is weakened, the plate thickness will be reduced in that area. acts to increase.

In the above-mentioned embodiment, the lateral intermediate roll is pivotally supported on the arm body, but the lateral intermediate roll may be pivotally supported on the block, and in the above embodiment, the lower work roll is supported in the direction along the rolling line. Although an example is shown in which the intermediate rolls are staggered, it is also possible to implement the intermediate roll with a similar configuration, and the guide surface of the guide portion (step portion 20 in the example) provided on the axle box may be As long as it can be guided in the circumferential direction around the roll axis, it does not necessarily have to be a continuous curved surface, and it can also be implemented as a 4-high rolling mill that does not use intermediate rolls. Of course, various changes can be made without departing from the gist of the invention.

Since the present invention has the above-described configuration, it can achieve the following excellent effects.

(i) The lateral intermediate roll can always be held in the proper position, and even if the diameter of the work roll or intermediate roll increases or decreases and the axial center position changes, the axial center of the lateral intermediate roll will automatically remain in the proper position accordingly. Since the rolls are displaced, it is not necessary to adjust the position of the lateral intermediate rolls.

(ii) Since the lateral intermediate roll can always be held in an appropriate position, the amount of deflection of the work roll can be adjusted accurately, and the ability to control the shape of the rolled material can be increased.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is a partial sectional view showing the main part of the present invention, FIG. 3 is a view taken in the direction of the - arrow in FIG. 2, and FIG. 4 is a view taken in the direction shown in the - arrow of FIG. 1...Upper work roll, 2...Lower work roll, 3
... Upper back up roll, 4... Lower back up roll, 5... Intermediate roll, 10... Lateral back up roll, 11... Lateral intermediate roll, 17,
29...Fluid pressure cylinder, 19...Guide surface, 21,
24...Axle box, 22...Block, 26...Arm body, 27...Spring, 31...Arm.

Claims (1)

[Claims] 1. A work roll or an intermediate roll is provided so as to be appropriately shifted in the direction along the rolling line with respect to the back-up roll, and a position is a predetermined distance away from the roll provided so as to be appropriately shifted in the direction along the rolling line in the direction in which the roll is shifted. A multi-stage rolling mill having a shape control function, in which a lateral back-up roll is provided on the rolling line, and a lateral intermediate roll is provided between the roll provided with an appropriate shift in the direction along the rolling line and the lateral back-up roll so as to be in contact with both of these rolls. In the rolling machine, axle boxes are provided at both ends of the rolls, which are appropriately shifted in the direction along the rolling line, and are provided with guide portions for guiding the blocks in the circumferential direction around the axis of the rolls. The lateral intermediate roll is supported by an arm provided on the arm body so as to be movable toward and away from the guide portion, and the arm body is attached to the lateral backup roll shaft, and the arm is centered on the axis of the lateral backup roll. A multi-high rolling mill having a shape control function, characterized in that it is equipped with a device that rotates the rolling mill.