JPS6032882Y2 - rolling mill - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rolling mill equipped with a mechanism for controlling the shape of a rolled material.

In recent years, in order to control the thickness shape of rolled material in the width direction,
Although various methods of bending work rolls in four-high rolling mills have been widely used, conventional roll bending methods have had a limited ability to control the shape of rolled material.

In other words, the shape is good (particularly the thickness change is small in the width direction)
In order to obtain rolled products, it is important to minimize the deformation of work rolls due to rolling loads, etc., and to increase the correction ability by roll bending. There is only a bending device, so the amount of crown correction of the roll is small, and only a simple parabolic shape is corrected.
This was enough to correct the shape of simple selvage and middle elongation.

Further, the effect was small on narrow plates with a roll body length of 1n or less, and a good shape correction effect could not be obtained.

Therefore, as shown in FIGS. 1 and 2, the upper and lower work rolls a
, a, for example, the upper work roll a is set to have a smaller diameter, and the upper work roll a is appropriately shifted downstream in the rolling line direction with respect to the upper and lower backing rolls b, b, and the upper work roll a and the upper work roll a are A multi-high rolling mill has been devised in which an intermediate roll C is disposed between a backing roll b and a horizontal bending device d for horizontally bending the upper work roll a.

This rolling mill controls the shape of the rolled material e by utilizing the deflection of the upper work roll a in the rolling direction during rolling.
Above this, a horizontal bending device d adjusts the amount of deflection of the work roll a.
is a presser roll f having approximately the same length as the upper work roll a.
, a split back roll g made up of a plurality of rolls arranged in series at arbitrary intervals in the axial direction, a large number of supports disposed at both ends of the split back roll g and between each roll, and a housing L.
A beam j fixed between the beam j, a wedge provided on the support side of the beam j, a wedge 1 slidably fitted between the wedge and the support, and one end attached to the wedge. A single-shaped arm 0 is connected to the arm 0 through a link m, and its intermediate part is pivotally connected to the bracket n of the beam j, and a cylinder p whose head side is attached to the beam j and whose rond side is connected to the other end of the arm 0. The horizontal displacement of the split backing roll g in the horizontal bending device d is transmitted to the upper work roll a via the presser roll f to adjust the deflection of the upper work roll a, and the horizontal displacement at this time is The shape of the rolled material e is controlled by the displacement in the vertical direction, and when the divided hold roll g is strongly pressed against the presser roll f, the upper and lower work rolls a, a
As the gap decreases, the thickness of the rolled material e in that area decreases, and conversely, when the pressing force of the split backing rolls g is weakened, the thickness of the rolled material e in that area increases.

According to the multi-high rolling mill having the above-mentioned shape control function, the horizontal bending of the work roll can be made large, and therefore the amount of vertically calculated crown can be increased, so the shape control ability can be increased, and the rolling force can be reduced and the rolling power can be increased. On the other hand, since the horizontal bending device d is equipped with a wedge and a mechanism is provided to press the divided hold roll g by m, a large beam j is required to receive the reaction force. was required between the housings i, and it was not easy to assemble and rearrange the presser roll f and the split backing roll g.

The present invention was developed in view of these circumstances, and includes at least one work roll that is appropriately shifted in the direction of the rolling line with respect to the rolling line that connects the axes of the upper and lower hold-down rolls, and that the work roll is In a rolling mill that controls the shape of a rolled material by deflecting it in the horizontal direction, a shaft is inserted between a roll shell and a shaft that is loosely inserted into the shell and supported at both ends of the shell in a sealed state via bearings. The flexible crown roll is divided into two in the direction to form a pressure chamber and a non-pressure chamber, and the roll shell can be freely bent by adjusting the supply of pressure oil to the pressure chamber. Arranged on the roll shifting side, the flexible crown roll is brought into contact with the shifting work roll via a presser roll, and the respective shaft ends of the flexible crown roll, the presser roll, and the shifting work roll are placed in the same shaft box. This relates to a rolling mill characterized in that it is supported.

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

As shown in FIG.
Upper work roll 1 with a smaller diameter, the upper work roll 1
, an upper backing roll 3 that supports the lower work roll 1 , a lower backing roll 4 that supports the lower work roll 2 , and between the upper work roll 1 and the upper backing roll 3 An intermediate roll 5 having approximately the same diameter as the lower work roll 2 is provided, and the intermediate roll 5 is appropriately shifted (offset) in the downstream direction of the rolling line with respect to the reduction line connecting the centers of the upper and lower backing rolls 3 and 4. ) In the 5-high rolling mill equipped with
A flexible crown roll 7 is disposed on the shifting side of the upper work roll 1 via a presser roll 6, and each shaft end of the flexible crown roll 7, presser roll 6, and upper work roll 1 is connected to a housing 9°9 ( Axle box 10, 1 attached to the axle box (see Fig. 6)
0 is integrally supported.

That is, as shown in FIG. 7, the shaft end of the upper work roll 1 is supported by the shaft box 10 via a bearing 25, and the shaft end of the presser roll 6 is supported by the shaft box 10 through a bearing 26 and the shaft box 27 that holds the bearing 26. The shaft end of the flexible crown roll 7 is directly supported by the shaft box 10 so as to be movable in the rolling line direction.

Details of the flexible crown roll 7 are as shown in FIGS. 4 and 5.

That is, the flexible crown roll 7 has a hollow shell 11
A shaft 12 shaped to maintain a required space between the shell 11 and the inner circumferential surface of the shell 11 is loosely inserted therein.
A sealing member 13.13 is provided in the axial direction at the circumferentially opposing portion of the shaft 12 to divide the space into two in an arc shape.
A pressure chamber 16 is formed by opening through the shaft 12, and a drain channel 18 connected to a drain tank 17 is connected to the shaft 12 in the other space.
is opened to form a non-pressure chamber 19, and an oil pressure detection passage 21 is opened in the pressure chamber 16 to be connected to an oil pressure gauge 20. A spherical bearing 22 and a seal ring 23 are respectively installed between the surfaces,
Furthermore, as shown in FIG. 7, each end of the shaft 12 is equipped with a bending cylinder 24 or a filler, and in use, as shown in FIG.
The position of the shaft 12 is kept fixed so that it faces the presser roll 6 side.

In the figure, 8 is a spacer for holding the position of the sealing member 13.

In the rolling mill having the above configuration, when it is necessary to horizontally bend the upper work roll 1 in order to control the shape of the rolled material, the hydraulic pump 14 is driven to supply pressure oil through the flow path 15 to the flexible crown roll. It is supplied to the pressure chamber 16 in 7.

Due to this supply of pressure oil, the shell 11 located on the pressure chamber 16 side expands and bends toward the presser roll 6 side, and this deflection is transmitted to the upper work roll 1 via the presser roll 6. , a conventional reaction force receiver can eliminate the need for a large beam.

The deflection of the above-mentioned flexible crown roll 7 can be adjusted by increasing or decreasing the amount of pressure oil supplied to the pressure chamber 16, and since such oil pressure can be detected by the oil pressure gauge 20, the deflection of the above-mentioned roll 7 can be controlled with precision. Furthermore, by making full use of the bending cylinder 24, a flexible bending shape can be obtained.

Therefore, the upper work roll 1 is
By adjusting the horizontal deflection of each part, the shape of the rolled material can be controlled over a wide range and with high precision.

Further, in the present invention, each shaft portion of the upper work roll 1, presser roll 6, and flexible crown roll 7 is mounted on one bearing 10.
Since the rollers are integrally supported by the rollers, each roll can be easily attached and detached.

The present invention is a general rolling mill in which the shape of the rolled material is controlled by offsetting one or both of the work rolls in the direction of the rolling line with respect to the rolling line connecting the upper and lower hold-down rolls and deflecting them in the horizontal direction. It goes without saying that various changes can be made without departing from the gist of the present invention.

As described above, according to the present invention, in a rolling mill in which the upper and lower hold-down rolls are offset in the rolling line direction with respect to the rolling line and deflected in the horizontal direction, a hydraulic pressure is applied to the offset side of the work roll. A flexible crown roll that can be bent to any shape is provided, and its shaft end is supported in the same shaft box as the work roll.
The large bending force conventionally required when bending work rolls:
The force receiver eliminates the need for a beam and exhibits excellent effects such as being easy to attach and detach.

[Brief explanation of drawings]

Fig. 1 is a side view of a conventional rolling mill, Fig. 2 is a view taken in the direction of the ■ arrow in Fig. 1, Fig. 3 is a side view of the rolling mill of the present invention, and Fig. 4 is a side view of the rolling mill of the present invention. A vertical sectional view of the flexible crown roll, FIG. 5 is a view taken along the ■-■ arrow in FIG. 4, FIG. 6 is a plan view showing the operating state of the rolling mill of the present invention, and FIG. 7 is an explanation of the integral shaft box part It is a diagram. 1.2... Work roll, 3, 4... Pre-low'/L/, 5... Intermediate roll, 6...
・Presser roll, 7◆・・・Flexible crown roll, 9
...Housing, 10...Axle box, 11
...Shell, 12...Axis, 13...
... Seal member, 16 ... Pressure chamber, 19 ...
...Non-pressure chamber.

Claims (1)

[Scope of utility model registration request] At least one of the work rolls is provided to be appropriately shifted in the rolling line direction with respect to the reduction line connecting the axes of the upper and lower hold-down rolls, and the work roll is deflected in the horizontal direction to control the shape of the rolled material. In a rolling mill configured as follows,
A pressure chamber and a non-pressure chamber are formed by dividing the space between the roll shell and a shaft loosely inserted into the shell and supporting both ends of the shell in a sealed state through bearings in the circumferential direction, and A flexible crown roll that can freely deflect the roll shell by adjusting the supply of pressure oil into the pressure chamber is disposed on the shifting side of the work roll, and the flexible crown roll is attached to the shifting work roll via a presser roll. A rolling mill characterized in that the shaft end portions of the flexible crown roll, presser roll, and shifting work roll are supported by the same shaft box.