JPS63104710A - Bearing box for backup roll of rolling mill - Google Patents

Abstract

PURPOSE:To provide a backup roll bending function to the rolling load itself without requiring an additive bending load generator by providing beams extending to load transmission parts of mutual bearing boxes to the bearing boxes so as to receive the load from the other sides. CONSTITUTION:The rolling load of the backup roll 1 is supported by bearings 2 and is transmitted, on both the operation side and driving side, to a housing via rocker plates 7 from the respective load transmission parts 4 on the lower side thereof. The rocker plates 7 and height adjusters 6 are brought into contact with each other by the height adjusters 6. The contact of the load transmission parts 4 and the rocker plates 7 is prohibited to transmit the rolling load on; for example, the operation side, via the adjuster 6 to the plate 7 on the driving side on the opposite side through the beam 5. The ratio of the load to be transmitted to the plate 7 of the other side is changed by adjusting the height of the adjuster 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cold rolling mill, and particularly to a shape control mill suitable for skin pass rolling which requires a good shape.

[Conventional technology]

The conventional reinforcing roll bending method is shown in "Recent Advances in Plate Rolling and Rolling Mills" (1982), p. 150, Figure 3.28, Japan Iron and Steel Institute. As is clear here, there is no example in which the rolling load itself is used as a means for applying reinforcing roll bending; in all cases, a load generating device such as a hydraulic cylinder is used to generate the bending load.

[Problem that the invention seeks to solve]

All of the above conventional techniques require an additional bending load generator for reinforcing roll bending.An object of the present invention is to eliminate the need for an additional bending load generator, and the rolling load itself has the reinforcing roll bending function. The purpose is to do so.

Rolling mills that incorporate intermediate rolls are already well-established as rolling mills that perform shape control, but rolling mills with even better shape
In order to provide a rolling mill product with excellent flatness, it is necessary to apply a bending moment to the stiffest reinforcing roll and perform ideal quadratic bending adjustment.

However, in order to perform reinforcing roll bending on a conventional rolling mill, it is necessary not only to extend the reinforcing rolls but also to install large-diameter hydraulic cylinders, bending beams, etc. to generate bending loads, which is not necessary if the equipment is not new. was virtually impossible.

[Means for solving problems]

The above objective is achieved by configuring a bearing part that can transmit a moment load to the bearing box, extending a beam from the bearing box to generate a moment, and receiving the load from the opposite side reduction screw. Ru.

[Effect]

According to this bearing structure, a moment due to a simple rolling load and a moment opposite to the moment due to the rolling load generated by the beam are generated on the reinforcing roll, and since the moment due to the beam can be variably adjusted, the reinforcing roll Since the axial deflection of the (intermediate roll) is variable even with a constant rolling load, it is possible to control the shape of the rolling mill via the work roll (intermediate roll).

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is an assembly diagram of a reinforcing roll employing the present invention. The reinforcing roll 1 is provided with a bearing 2, which is used even when no bending is required, and a bending bearing 3, which is used for reinforcing roll bending, on the operating side and the driving side, respectively. In the case without conventional reinforced roll bending, the rolling load transmitted from the roll barrel shown by the arrow is supported by the bearing 2, and is transmitted to the housing via the rocker pre-door from the load transmission section 4 located below both on the operation side and the drive side. be done. By the way, the height adjustment device 6 allows the rocker plate 7 to be in contact with the height adjustment device 6, and further.

If the load transmission part 4 and the rocker plate 7 are prevented from contacting each other, for example, the operating side bearing 2 and the bending bearing 3
The rolling load received at is passed through the beam 5 to the rocker plate 7 on the opposite side, that is, the drive side, at a height of ig! III device 6
transmitted via. By adjusting the height of the height adjustment device 6, the load transmitted from the operating side bearing 2 to the operating side rocker plate 7 and the driving side rocker plate 7 can be adjusted.
You can change the ratio of the load transferred to the These relationships are shown in Figure 2, where (a) shows the bending moment applied to the roll, and (b) shows the roll axis displacement.A shows the state without reinforcing roll bending.

That is, there is a gap between the height adjustment device 6 and the rocker plate 7, and the gap changes from B to C as the height adjustment device 6 is made higher, which indicates a case where no load is transmitted. As a result, the axial deflection of the reinforcing roll 1 can be variably controlled by adjusting the height adjusting device 6.

Figure 3 shows an artificial rolling mill using the reinforcing roll bearing box of the present invention. This figure shows an example in which it is used only for the lower reinforcing roll, but it can also be used only for the upper reinforcing roll. , both the upper and lower reinforcing rolls may be used.

According to this embodiment, reinforcing roll bending can be added without requiring an additional load generation mechanism.

In other words, work roll bending is effective at the plate edges;
While intermediate roll bending is effective in controlling the shape of the 174-width portion from the edge of the board, the bending of the present invention is effective in controlling the center portion of the board.

It is true that the result is small since it affects the rolling mill via intermediate rolls and work rolls, but it is a necessary means to obtain a truly flat shape.

〔Effect of the invention〕

According to the invention, variable reinforcing roll bending can be performed without additional load generating devices. This roll bending effect applies a parabolic bending moment to the reinforcing roll, so the shape of the product can be controlled smoothly, and the shape can be controlled over the entire width of the rolled material, regardless of the width.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a detailed explanatory diagram of the present invention, and FIG. 3 is a diagram showing an example of a rolling mill employing the present invention. DESCRIPTION OF SYMBOLS 1... Reinforcement roll, 2... Bearing, 3... Bending bearing, 4... Load transmission part, 5... Beam, 6...
Height adjustment device, 7...rocker plate.

Claims (1)

[Claims] 1. In a reinforcing roll bearing box provided with bearing boxes at both ends that transmit the load from the barrel portion to the housing, each of the bearing boxes has a beam extending to the load transmitting portion of the mutual bearing box. A reinforcing roll bearing box for a rolling mill, characterized in that it has a reinforcing roll bearing box for a rolling mill. 2. A patent characterized in that a height adjustment device is provided at the tip of the beam, and the ratio of the load transmitted directly from the load transmission section to the bearing and the load transmitted via the beam can be changed. A reinforcing roll bearing box for a rolling mill according to claim 1.