JPS61189809A - Rolling-mill equipment - Google Patents

Abstract

PURPOSE:To prevent the warp of a small-diam. work roll and to display the effect of high rolling-reduction rolling, by moving the work roll in the rolling direction in accordance with the signals of plural detectors used for detecting the horizontal displacement of the small-diam. work roll of a mill. CONSTITUTION:In a rolling mill formed by engaging roll chocks 4, for supporting a small-diam. work roll 1, vertically movably with guide blocks 5a, 5b; plural noncontact-type displacement meters 9a, 9b for detecting the horizontal displacement of the roll 1, are disposed on supporting beams 8a, 8b bridged between the guide blocks 5a, 5b. The displacement of each detecting part of the roll 1 is computed by a comparison computer 10 based on the signals outputted from these detectors 9a, 9b to obtain the horizontal displacement of the whole body by adding the computed values together by an adder 11. This displacement is compared with the signal, outputted from a displacement setter 13, by a controller 12, to transmit a driving command to a servovalve 7 in order to properly move the roll 1 in the direction of a rolling line by controlling cylinders 6a, 6b.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a rolling device.

[Conventional technology]

Generally, when rolling a plate using small diameter work rolls,
It is known that extremely high rolling reduction rates can be obtained. However, for example, work roll diameter Dw-80φ, plate width L=i
When ooo= and L/Dw: about 12.5, the work roll tends to bend in the horizontal direction, making it difficult to achieve dimensional accuracy.

The reason for this is that the transmission torque of the work roll is small and the work roll is not driven, but instead is driven by a stand-up roll or an intermediate roll, so the work roll is pushed horizontally by the torque component, and furthermore, the tension applied to the plate material is This is also because the differential force of is applied to the work roll.

Therefore, in order to prevent the small-diameter work roll from bending in the horizontal direction, a multistage cluster type rolling mill, typified by the Sendzimer rolling mill, has been developed.

[Problem that the invention seeks to solve]

However, in the case of such a cluster-type rolling mill, since a large number of divided rolls are used, there is a lot of heat generated between the rolls, and the rolls must be replaced frequently.In addition, roll marks are transferred to the plate material, resulting in a problem of quality deterioration. Ta.

The present invention provides a rolling device that can prevent horizontal bending of small-diameter work rolls and fully utilize the effects of small-diameter work rolls without using a large number of rolls like a multistage cluster type rolling mill. That is.

[Failure to solve the problem]

The present invention provides a rolling mill equipped with small diameter work rolls.
A plurality of detectors for detecting horizontal displacement of the work roll are arranged along the work roll, and the work roll is configured to be moved in the rolling line direction based on signals from the detectors. .

[For production]

Therefore, the position of the work roll is adjusted so that the work roll displacement signal detected by the detector has a predetermined value.

〔Example〕

First, the basic principle of the rolling machine of the present invention will be explained.0 The fact that the work roll bends horizontally means that a horizontal force is acting on the work roll, and if this horizontal force does not act on the work roll, the work roll will bend horizontally. Considering that the roll does not bend, the inventors of the present invention considered the balance of forces as shown in Fig. 3, and connected the work roll (11tl+) to the upper and lower backing rolls (2) (2
By offsetting the plate material (3) toward the exit side in the rolling line direction with respect to the rolling line connecting 1, and selecting the amount of offset, the horizontal component force F1 of the rolling force, the horizontal force F2 due to torque, and the horizontal force F2 due to tension are calculated. We find that there exists a point where , is in equilibrium. These relationships are: F+ + 2Ft + F3 = 0...
・(1) However, I+=offset amount P: rolling force R+7 d: equivalent radius (=-) RJ: radius of backing roll (2) r: radius of work roll (1) T: torque T,: forward tension T , : Can be replaced as backward tension. In the above formula (ii), the values other than the offset amount 6 are determined from the rolling conditions, so
If only the offset amount e is selected, the work roll (1)
does not bend horizontally.

Next, a specific example will be explained. As shown in Figures 1 and 2, upper and lower small diameter work rolls m
Both ends of the axle box (41 (4) in the rolling line direction of (1) are fixed and supported by guide blocks [5α) (5b) so as to be able to rise and fall, and a hydraulic cylinder (6α) is attached to the guide blocks (5α) (5b). ) (66) and connect the cylinder (
6α) and (6b) are configured to be pressed together from the horizontal direction by an electro-hydraulic servo valve (7). Also, work roll (1) fi+
Guide block (5α) (5LL) located on the exit side
) and between (5b) (5b) support beams (a, ) (a
b), and then each support beam (8α) (8b)
A plurality of non-contact displacement meters (9cL) (9b) for detecting the horizontal displacement of the work rolls (1) (1) are installed facing each other in the line direction along the work rolls (1)+11.

In addition, Ql is the displacement meter (
9α) (9b) Comparison calculation unit that calculates the difference between the signals, OD adds the signals from each calculation unit α1 and calculates the work roll +11
(No. 11 is an adder that calculates the displacement in the water erosion direction, and α is a controller that compares the signal from the adder 0υ and the signal from the displacement setter a3 and sends a drive command to the servo valve (7) if there is a difference. It is.

In a state where the initial offset position of the work roll (11 (11) is set and the position is held by the cylinder (6cz) (6b), the work roll +11 is set by rolling.
When (1) bends in the horizontal direction, the displacement of each part is measured by a displacement meter (9α)
(9b), and then the adder (Iυ
is determined as the overall horizontal displacement. Then,
The signal from the adder αυ and the signal from setting 3Q3 are compared in the controller α, and if there is a difference, a drive signal is sent to the servo valve (7) and the offset position of the work roll +11 (1) is corrected. . Note that this modification command is integrally controlled by the controller α2 so that the above-mentioned equation (11) is satisfied.

〔Effect of the invention〕

As explained above, the rolling apparatus of the present invention has the advantage of being able to prevent horizontal bending of small-diameter work rolls without using a large number of rolls unlike a multistage cluster type rolling mill. It can have a great effect.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a rolling apparatus of the present invention, FIG. 2 is a view taken along the line ■-■ in FIG. 1, and FIG. 3 is an explanatory diagram of the principle of the present invention. +11 is the work roll, (5G) (56) is the guide block, (6α) (6b) is the cylinder, (7) is the servo valve, (9α) (9b) is the non-contact displacement meter, (II is the comparison calculator , αυ is an adder, α2 is a controller, and αυ is a displacement setter.

Claims (1)

[Claims] 1) In a rolling mill equipped with small-diameter work rolls, a plurality of detectors for detecting horizontal displacement of the work rolls are arranged along the work rolls, and the work rolls are rolled based on signals from the detectors. A rolling device characterized in that it is configured to be movable in a line direction.