JPS61140307A - Rolling mill - Google Patents

Abstract

PURPOSE:To adjust optionally the direction and amount of the offset of a work roll by providing a device for moving work rolls in the advancing direction of a rolling stock, in a rolling mill equipped with respective pairs of work rolls and backup rolls. CONSTITUTION:Roll chocks 3, 4 for supporting freely rotatably respective upper and lower work rolls 1, 2, are inserted in-between blocks 6, 6, fixed to the window-parts of housings 5, vertically movably and movably in the parallel direction to the advancing direction of a rolling stock. Backup rolls 7, 8 are arranged at the upper and lower sides of rolls 1, 2; and roll chocks 9, 10, for supporting them freely rotatably, are supported vertically movably by said window parts. Hydraulic pistons 11, 12 capable of advancing and retreating parallelly to the advancing direction of rolling stock, are fitted to the insides of blocks 6, 6, to form an offset adjusting device. In case of changing the amount of offset, the chocks 3, 4 are pushed parallelly to the advancing direction of rolling stock, by separating the rolls 1, 2 and 7, 8 from each other and advancing and retreating the pistons 11, 12 to both sides.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a rolling mill in which the offset direction and offset acid of work rolls can be arbitrarily changed.

[Prior Art] Generally, in a multi-high rolling mill, rolls such as work rolls and backup rolls are arranged in rows approximately parallel to each other on a perpendicular line, and the offset direction and offset amount of the work rolls with respect to the backup rolls cannot be changed. .

[Problem to be Solved by the Invention 1] However, depending on the rolling conditions, there are cases where it is desired to arbitrarily change the offset direction and offset amount, and in the case of reverse rolling, the offset direction cannot be changed, and depending on the rolling direction. Because the work rolls sag, it is not possible to obtain rolled material with good precision.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a rolling mill in which the offset direction and offset amount can be arbitrarily changed.

[Means for Solving the Problems] The present invention provides a device for offsetting the work roll with respect to the backup roll in a direction parallel to the rolling direction of the rolled material in a rolling mill equipped with a pair of upper and lower work rolls and a backup roll. In addition, an intermediate roll is provided between the upper and lower work rolls and the upper and lower back-up rolls, or both, and which can be inclined with respect to each of the rolls when viewed from above.

[Function] Therefore, in the present invention, rolling is performed with the work roll offset to a predetermined position, and in addition, rolling is performed with the intermediate roll being inclined with respect to the other rolls when viewed in plan.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention, in which a pair of upper and lower work rolls 1 and 2 are rotatably supported by upper and lower work roll chocks 3 and 4, respectively, and the upper and lower work rolls 1 and 2 are arranged in a rolling mill housing 5. At the same time, the upper and lower work roll chocks 3 and 4 are fitted between the blocks 6 and 6 fixed to the window part of the rolling mill housing 5 so that they can be raised and lowered and moved in a direction parallel to the direction in which the rolled material is traveling. Above and below the upper and lower work rolls 1 and 2, the upper and lower work rolls 1
．． Upper and lower backup rolls 1 and 8 to back up 2
The upper and lower backup roll chocks 9.10, which rotatably support the upper and lower backup rolls 1.8, are supported by the window portion of the rolling mill housing 5 so as to be movable up and down.

Hydraulic pistons 9.10 are installed at the top and bottom of the block 6 for both roll balancing and roll bending.
The upper and lower ends of the hydraulic pistons 9 and 10 are fitted together so that they can be raised and lowered, and the upper and lower ends of the hydraulic pistons 9 and 10 are connected to the collars 3a and 3a of the upper and lower work roll chocks 3 and 4, respectively.
4a, and fitted inside the block 6 with hydraulic pistons 11 and 12 that can move forward and backward in a direction parallel to the direction in which the rolled material travels to form an offset adjustment device. 12 is brought into contact with the side of the upper and lower work roll chocks 3.4.

In the figure, S is the offset amount of the upper and lower work rolls 1.2 with respect to the upper and lower backup rolls 7.8.

When changing the offset ff1s, use appropriate means to change the upper and lower work rolls 1.2 and upper and lower backup rolls 7.8.
is released, and the left and right hydraulic pistons 11.12 in FIG. Adjusting the offset amount S in step 2 = Also, when changing the offset direction from the state shown in Fig. 1 to the opposite side, adjust the hydraulic piston 11° 12 on the right side of Fig. 1.
, and push the upper and lower work roll chocks 3.4 to the left in the figure, thereby moving the center of the upper and lower work rolls 1.2 to the left of the vertical line. At this time, the left hydraulic piston 11.42 is connected to the upper and lower work roll chocks 3.
, 4 leaves work after being pushed.

In this way, by arbitrarily changing the offset direction and the amount of offlet, it is possible to carry out optimal rolling according to the rolling conditions, and the upper and lower work rolls 1.2 do not shake even in the case of Ribagos rolling. ” Figure 2 shows another embodiment of Mizumoto!, which differs from the previous embodiment in that an intermediate roll 13 is inserted between the upper work roll 1 and the upper backup roll 1, and the intermediate roll 13 is The point is that the upper work roll 1 can be tilted relative to the upper work rolls 1 and other rolls.

With such a configuration, the plate crown shape of the rolled material can be controlled by the inclination of the intermediate roll, and the lateral shift of the upper work roll due to the inclination of the intermediate roll can be prevented by the hydraulic piston 11.
This can be prevented by The intermediate roll is not between upper work roll 1 and upper backup roll 1, but between lower work roll 2
It may be provided only between the upper and lower backup rolls 8, or between the upper and lower work rolls 1.2 and the upper and lower backup rolls 7.8.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] According to the rolling mill of the present invention, since an offset adjustment device is provided that moves the work roll in the rolling material progressing direction, the offset direction and offset amount of the work roll can be arbitrarily adjusted. Therefore, it is possible to perform optimal rolling according to the rolling conditions, and moreover, it is possible to achieve various excellent effects, such as being able to obtain rolled material with high accuracy by eliminating the raft between the work roll chock and the rolling machine housing during reverse rolling. .

[Brief explanation of drawings]

@ Figure 1 is an explanatory diagram of one embodiment of the rolling mill of the present invention, and Figure 2 is an explanatory diagram of another embodiment of the rolling mill of the present invention. In the figure, 1 is the upper work roll, 2 is the lower work roll, 3 is the upper work roll chock, 4 is the lower work roll chock,
6 is a block, 7 is an upper backup roll, and 8 is a lower backup roll. 9 is an upper backup roll chock, 10 is a lower backup roll chock, 11 is a fluid pressure cylinder, 12 is a fluid pressure cylinder, and 13 is an intermediate roll. Patent application Hitoshi Kawajima Harima Heavy Industries Co., Ltd. 'Mihantori' Figure 1 Figure 2

Claims (1)

[Claims] 1) A rolling mill equipped with a pair of upper and lower work rolls and a backup roll, characterized in that a device is provided for offsetting the work roll with respect to the backup roll in a direction parallel to the rolling material progress direction. rolling mill. 2) In a rolling mill equipped with a pair of upper and lower work rolls and a backup roll, a device is provided that offsets the work roll in a direction parallel to the rolling material progressing direction with respect to the backup roll, and the upper work roll and the upper backup roll are Between the lower work roll and the lower backup roll, or between the upper and lower work rolls and the upper and lower backup rolls, an intermediate roll that can be inclined with respect to each of the rolls in plan view is provided. A rolling mill characterized by the following: