JPS5835003A - Multistages rolling mill having shape control function - Google Patents

Abstract

PURPOSE:To improve shape control functions by effective application of the displacement of press rolls to work rolls in multistages rolling mills having shape control functions by providing the projecting shape crown corresponding to split rolls to the press rolls. CONSTITUTION:In the stage of rolling, a lower work roll 5 is offset in a rolling direction and pressure oil is supplied to cylinders 9-1-9-7 to project piston rods 8-1-8-7 individually by arbitrary extents and to move supporting plates 10-1- 10-7 by arbitrary extents, thereby pressing split rolls 14-1-14-6 to a press roll 15 and giving desired horizontal bending to the roll 15. Then, the roll 5 displaces in a horizontal direction and displaces in a vertical direction as well simultaneously, whereby the roll crown in changed and the shape of a rolled material S is controlled freely.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-high rolling mill equipped with a mechanism for controlling the shape of rolled material.

In recent years, in order to control the thickness shape of rolled material in the width direction,
Although various methods for bending work rolls in four-high rolling mills have been developed and implemented, conventional roll bending methods have had limitations in their ability to control the shape of rolled materials.

That is, in order to obtain a rolled product with a good shape and little change in thickness, especially in the thickness direction, deformation of the work roll due to rolling load etc. should be minimized < L, and the correction ability by roll bending should be increased. This is very important.

Conventional four-high rolling mills only have a vertical roll bedding device, so the amount of crown correction of the rolls is small and only a simple parabolic leg shape is corrected. It was possible to correct the shape of the ears and the inside. In addition, the effect was small on narrow plates of less than % of the roll axis length, and a good shape correction effect could not be obtained.

Therefore, in order to eliminate the above-mentioned drawbacks, one of the upper and lower work rolls is made smaller in diameter than the other, the small-diameter work roll is offset in the rolling direction with respect to the other work roll, and the small-diameter work roll is A multi-roll mill was proposed in which horizontal bending is applied by split rolls via a presser roll parallel to the work roll, and this horizontal bending corrects the roll crown in the vertical direction of the work roll. Since the roll is a split roll, when the presser roll is pressed, the force applied locally is dispersed and the sensitive partial pressure is not transmitted to the work roll because it is via the presser roll. This was done with the purpose of improving the shape control function by greatly and arbitrarily changing the roll crown in the vertical direction of the work roll, and one work roll of the upper and lower work rolls has a smaller diameter than the other work roll. the small diameter work roll is offset in the rolling direction with respect to the other work roll, and a presser roll, a dividing roll, and a horizontal bending device are arranged parallel to the small diameter work roll on the offset side of the small diameter work roll. This rolling mill is characterized in that a convex crown is provided on the outer periphery of the portion of the presser roll that contacts the divided rolls.

Hereinafter, embodiments of the present invention will be described and explained with reference to the drawings.

The upper work roll (
3) When placing the
All intermediate rolls (4) are placed above the upper work roll (
3) and the intermediate roll (4), the upper work roll (3)
A lower work roll (5 inches) having a diameter smaller than that of the lower work roll (3) is provided, and the lower work roll is offset in the rolling direction from the upper work roll (3).

Place the casing (7) inside the clamp (6) of the rolling mill.
) and attach the piston/rod (8) to the caning (7).
-1) (8-z)...(8-7) is a fluid pressure cylinder (9) that can move forward and backward in the rolling mill lie/direction.
-01(9-z)...(9-?) are arranged in multiple sets at required intervals in the rolling mill width direction, and on the tip side of the casing (7),
Piston rod (8-+) (8-2)...(8-
(10-1) (10-2)...
(10-7').

Support play) (10-s) (10-2)...(
10-7) and the number of fluid pressure cylinders (9-+) (9
-z )...(9-7) is the same as the number of pairs, and each supporting play)(10-+)(10-2)...(10-7
) are the corresponding fluid pressure cylinders (9-+) (9-
2) It can be slid by (9-7).

Supporting grade (10-+) (10-2)...(1
A horizontal U-shaped groove with an open surface facing the lower work roll (5) is provided at the tip of the lower work roll (5), and an axis 0υ parallel to the lower work roll (5) is inserted through the groove to form a groove edge. Axis 0 depending on the part
support play on both sides)
(10-s) At (IO-t), a hydraulic cylinder (
12a) A clamp for gripping the shaft 0υ that opens and closes with (1:zb) (13a) (13b) K pivotably mounted, between each support plate (10-1) (10-2)... (1G-z) Split roll (14-+) (
14-2)...(14-o) is rotatably pivoted.

Lower work roll (5) and split roll (14-,) (1
4-z...('4-6) The center is between the lower work roll (5) and the dividing roll (14-1) (14
-2)...(,14-6) The insert roll (to) located directly on the line Ht connected to the center is illuminated so that it is parallel to the lower work roll (5), and the presser roll's end axis is Attached to the part is an axle box that guides the presser roll 05 so that it cannot move up and down but can move in the same direction as the piston rods (8-1), (8-z), . . . (8-7), Divided roll on the outer peripheral surface of presser roll Q9 (14-1> (14-2
)... At the contact position with (14-6), as shown in Fig. 2, a convex crown is attached so that the diameter is large near the center in the width direction of each divided roll and becomes small when it deviates from the center. .

In the figure, (17-'+) (,17-z)...(
17-y) is piston/rod (8-t) (8-2)
This is a sensor that detects the moving edge of (8-7).

Next, the operation of the present invention will be explained.

During rolling, the lower work roll (5) is rotated toward the rolling direction, and the hydraulic cylinders (A9-1) (9-2)
・・・(9-7) is supplied with pressure oil, and the piston rod (8
-1) (8-2)... (8-t) are individually protruded by an arbitrary amount to support play) ('0-t) (1
0-z)...(10-y)t: Move by an arbitrary amount and support grating (10-1)(10-2)...(1
0-7) divided rolls (14-1) (14-2)
... (14-s) with arbitrary strength and roll OG
to give the desired horizontal opening to the presser roll αG.

When the desired horizontal opening is given to the presser roll Q5, the lower work roll (5) is displaced horizontally and at the same time vertically, changing the roll crown, and thus the rolled material (
The shape of S) can be freely controlled according to the displacement position and displacement amount. This shape control function becomes even better when a work roll bending device is also used.

In the embodiments of the present invention, a case has been described in which the shaft of the split roll is inserted into a horizontal U-shaped groove provided in the support plate and clamped on both sides. The crystal ball offset and pushed by the presser roll may also be used as the upper work roll, and the actuator that presses the presser roll may be replaced with a fluid pressure cylinder. It goes without saying that a wedge or a screw rod may be used, and that various changes may be made without departing from the gist of the invention.

According to the multi-high rolling mill having a shape control function of the present invention, since the presser roll is provided with a convex crown corresponding to the split roll, displacement due to horizontal opening can be effectively applied to the work roll, Therefore, the vertical displacement amount and deflection curve of the work roll can be set largely and freely, and as a result, the shape control function becomes even better than before.

[Brief explanation of drawings]

Fig. 1 is an overall view of the multi-high rolling mill having a shape control function according to the present invention, Fig. 2 is a plan view of the shape control mechanism section of the rolling mill shown in Fig. 1, and Fig. 3 is a 111- in Fig. 1 direction arrow view, 4th
The figure is a view taken in the direction of the -fV arrow in FIG. 2. In the figure, (3) is the upper work roll, (5) is the lower work roll, (8-1) (8-2)... (8-7) is the piston rod, (9-1) (9-x) -(9-7) is a fluid pressure cylinder, (10-1)(10-'z)...(1
0-t) is the support plate, ('4-1)! 14-21・
- (14, -6) indicates a split roll, and αQ indicates a presser roll. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd. Figure 1

Claims (1)

[Claims] 1) One of the workpiece openings of the upper and lower low crawls -
the small diameter work roll is offset in the rolling direction with respect to the other work roll, and on the offset side of the small diameter work roll, a presser roll parallel to the small diameter work roll; Split roll and
1. A multi-high rolling mill having a shape control function, characterized in that a convex crown is provided on the outer periphery of a portion of a presser roll that is in contact with a divided roll, in a rolling mill that is equipped with a device in both the horizontal and horizontal directions.