JPS59101206A - Rolling mill - Google Patents

Abstract

PURPOSE:To provide a rolling mill which can maintain the specified controlling pressure in horizontal bending at all times by constituting said mill wherein a bending roll and split backup rolls for applying horizontal bend on a work roll can be maintained always within the same plane as the plane of the work roll. CONSTITUTION:A horizontal bender consisting of a bending roll 6, split backup rolls 10 and a hydraulic cylinder 13 is provided on the offset side of a work roll 3 offset from a rolling down line in order to apply optional horizontal bend on said work roll 3, in a six-stage rolling mill. Said bending roll 8 and split backup rolls 10 are held always within the same plane as the plane of the roll 3 by fitting slidably journal boxes 9, 11 for said rolls into a guide groove 7 recessed in the extension part of the journal box 6 of the roll 3 in the longitudinal direction thereof. The force obtd. by extending the cylinder 13 is transmitted, via a pressing plate 19 and a support plate 16 holding the shaft 15 of the rolls 19, to the rolls 10 and the roll 8 by the above-mentioned constitution, whereby the roll 3 is deflected freely.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for offsetting the work roll from the reduction line.
,, iRegarding an improvement of a rolling mill equipped with a work roll horizontal bending device on the offset side.

Generally, in this type of rolling mill, there is a bending roll in contact with the work roll on the offset side, a split back roll that gives arbitrary horizontal bending to the bending roll, and a hydraulic cylinder, etc. that presses each split back roll. It constitutes a bending device. In such a rolling mill, for example, when the diameters of the work roll, bending roll, split back roll, etc. are changed, the offset amount of the work roll is It will change.

Therefore, even if the rolling force is the same, the horizontal component force applied to the work roll becomes larger, so it is necessary to change the control force on the horizontal bending device side by one width, that is, it is necessary to adjust the control force each time the diameter of the roll changes. .

The present invention has been made in view of these circumstances, and is intended to provide a rolling mill in which the control force on the horizontal bending device side is always constant even when the diameter of the rolls changes.

Hereinafter, the present invention will be described in detail with reference to the drawings.

Figures 1 and 2 show a six-high rolling mill equipped with a horizontal bending device.
) is a back roll, (3) is a work roll that has been appropriately offset from the rolling down/in position, (4) is a driving intermediate roll placed between the back roll (2) and work roll (3), (
5) is an intermediate roll shaft box.

The axle box (6) of the work roll (3) is formed to extend toward the offset side, and a guide groove (7) along the longitudinal direction is recessed inside the extension part, and a horizontal bending groove is formed in the guide groove (7). The axle box (9) of the bending roll (8) on the apparatus side and the axle box (1]) of the one-piece backing roll αO are slidably fitted.

Also, as shown in Fig. 3, the axle box (5) of the intermediate roll (4)
) (5) In between, there is a beam (5) at the top of the offset side.
At the same time, a wedge groove α having an inclination in the same direction as the pressing direction of the pressing cylinder U described later is recessed at a required interval position on the lower surface of the beam (6), and a wedge groove α is formed in each groove α →. is slidably engaged with the upper end wedge α force of the support plate (4) that supports the shaft (c) between each split backing roll (a) and (g) and on both sides.

A cylinder block (G) equipped with the required number of cylinders α■ is installed between the housings (1) (1) on the offset side, and the support plate (A) is moved in a predetermined direction by the expansion and contraction movement of the cylinders CL■. For pressing, the plate α is movably provided, and the contact surface between the plate 0 and the support plate a6) is configured to be slidable in the vertical direction.

Further, at the lower position on the opposite side of the intermediate roll shaft box (5), there is a cylinder block Q having a cylinder bracket at one end.
The middle part of the cylinder is pivotally connected with a bottle □□□, and the tip of the cylinder rod is provided with a reaction force receiver corresponding to the curved part (C) formed on the opposite side of the work roll shaft box (6). An arm (c) is provided so that the horizontal reaction force of the work roll (3) is received by a rigid shaft box (5), and an intermediate roll (4) is provided on the other end of the cylinder block Q center. ) so that driving force can be obtained by pressing the work roll (3) against the
Install the push cylinder (c). In the figure, (a) is a bush.

In such a configuration, when the cylinder σ is extended, the force is transmitted to the pressing plate α, the support plate (4), the shaft α, the split holding roll, and the bending roll (8), and the work roll ( 3) can be bent freely.

Here, for example, if the work roll (3) is replaced with one of a different diameter, the bending roll (8) and split backing roll αO will be changed to each shaft box (9) by the amount corresponding to the diameter change.
1υ along the guide groove (7) of the work roll axle box (6). Therefore, the work roll (3
) and ) The winding roll (8) and the split backing roll α [phase] are always kept on the same surface. This also applies to the change in diameter of the bending roll (8) or the split backroll αO. However, work role (3)
There is almost no need to change the offset amount.

Furthermore, the support plate αO supporting the split backing roll α0 can slide vertically with respect to the pressing plates α, and the wedge α force at the upper end is applied at a constant angle of inclination to the wedge groove Q4) of the beam (6). The straight line connecting the axes of the work roll (3), bending roll (8), and split back roll αO is as follows: The same inclination angle as originally set can be maintained, so even if the diameter of the roll changes, the control force on the horizontal bending device side does not require any adjustment.

In addition, in the present invention, the horizontal reaction force applied to the work roll (3) is
Since the reaction force is directly received by the axle box (5) which is a rigid body, there is no need to use a special hydraulic force for receiving the reaction force. The cylinder (A) is simply for adjusting the position of the arm (C).

As explained above, according to the present invention, even if the roll diameter changes, there is almost no need to change the offset amount of the work roll, so the control force on the horizontal bending device side is always constant and no adjustment is required. It can produce excellent effects.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway 1-analysis surface view showing the main parts of the rolling mill of the present invention, Fig. 2 is a view taken in the direction of the ■-■ arrow in Fig. 1, and Fig. 6 is a -■-■ diagram in Fig. 1. It is a directional view. (3)... Work roll, (4)... Intermediate roll,
(5) (6)...Axle box, (7)...Guide groove, (
8)...Bending roll, (9)...Axle box, α
O...Split reserve roll, αυ...Axle box, (6)...
・Beam, α■...Cylinder, α→...Slot, α-shaft, (A)...Pa support plate, α force...Wedge, α...
・Press plate. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) In order to appropriately offset the work roll from the reduction line and to apply arbitrary horizontal bending to the work roll, a horizontal bending device consisting of a bending roll, a split backing roll, a pressing mechanism, etc. is installed on the offset side ζ. In the rolling mill equipped with the above-mentioned rolling mill, the axle boxes of the work rolls are formed to extend toward the offset side, a guide groove is provided along the longitudinal direction in the extended part, and the axle boxes of the bending roll and the split backing roll are inserted into the guide grooves. 1. A rolling mill characterized in that a work roll, a hedding roll, and a split hold roll are always held in the same plane by being slidably fitted into each other.