JPH074610B2 - Side guide of hot continuous rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a device which is a side guide provided on the rolling mill entrance side of a subsequent stage of a hot continuous rolling mill and which can prevent the tail end of a material to be rolled from being narrowed. In particular, the present invention relates to a side guide suitable for a hot continuous finishing mill.

<Prior Art> In a continuous hot rolling mill, particularly in a post-stage rolling mill of a hot continuous finish rolling mill, since the material to be rolled (hereinafter referred to as a steel plate) has a small thickness, it is possible to use a rolling mill between two continuous rolling mills. After the tail end of the steel plate passes through the former rolling mill, the steel plate moves in the axial direction of the work roll in the latter rolling mill (hereinafter referred to as meandering), and its tail end makes strong contact with the side guides and the work roll is folded as it is. Accidents called so-called narrowing often occur when the user is caught in the car.

As a conventional meandering prevention means, one-side reduction control is performed to adjust the work rolls of the rolling mill to the left and right respectively (for example, JP-A-59-45011). In addition, JP-A-58-173009
There is proposed a method in which the looper roll is inclined in a horizontal plane as in JP-A-57-102407 and a looper roll having a middle-high crown shape as in JP-A-57-102407.

<Problems to be Solved by the Invention> However, the above-described single reduction control is effective in the state where the steel sheet is present in the pre-rolling mill and tension is applied to the steel sheet, but the tail end of the steel sheet is subjected to pre-rolling. After slipping out of the machine, it is in a tensionless state, so there is a drawback that its effect cannot be fully exerted. Similarly, controlling the meandering with a looper roll is not effective in a tensionless state.

The present invention has been made for the purpose of eliminating the above-mentioned drawbacks, and means for extremely effectively preventing the meandering of steel sheets even after slipping through the front-stage rolling mills of two rolling mills whose tail ends are adjacent to each other is provided. It was developed.

<Means for Solving Problems> The present invention relates to a side guide provided on the entrance side of a post-rolling mill of a hot continuous finish rolling mill, which is inside the opposite left and right guide frames and of the post-rolling mill. At a position close to the work roll, a cantilevered fixed lower pinch roll and a liftable upper pinch roll are provided on the guide frame, respectively, and the trailing edge signal of the material to be rolled in the rolling mill immediately before the side guide or Based on the trailing edge prediction signal,
By holding both side edges of the material to be rolled by lowering the upper pinch roll, it relates to a side guide of a hot continuous rolling mill characterized by preventing narrowing of the tail end of the material to be rolled, The above-mentioned side guide relates to the side guide of the hot continuous rolling mill in which the inner ends of the pinch rolls are installed so as to be inclined in the plate traveling direction in a horizontal plane.

<Operation> In the present invention, by providing pinch rolls inside the pair of left and right side guides provided on the entrance side of the rolling mill and whose width is adjusted according to the steel plate width, and further at positions close to the work rolls of the rolling mill, It is possible to apply tension to the steel plate until the tail end of the steel plate reaches the vicinity of the work roll.

Further, by installing the pair of left and right pinch rolls so that the inner ends thereof are inclined in the traveling direction of the steel sheet, it is possible to center the steel sheet itself.

<Examples> Next, the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an entire side guide device according to the present invention. FIG. 2 is a plan view of the present invention showing a half from the center of the line, but the side guide device of the present invention is symmetrical with respect to the center of the line. In FIGS. 1 and 2, 16 is a work roll of a rolling mill, 17 is a housing, 18 is a wiper for draining cooling water for cooling the work roll 16, and 19 is a cooling water header for cooling the work roll 16. The side guide device 1 is installed on the entrance side of the rolling mill configured as described above.

The side guide device 1 is provided on the main body frame 2 that moves closer to and away from the rolling mill on the shift rail 13 according to the operation of the cylinder 14, and is provided on the main body frame 2, and extends in the width direction of the steel plate S along the guide 11. It is composed of a pair of guide frames 3 that are movably provided, a guide side plate 4 that is vertically fixed as a member of the guide frame 3, and a center guide 15 that supports a steel plate S from below.

A vertical guide roller (not shown) that is rotatable is attached to the guide side plate 4 as needed.

The side guide device 1 is close to the work roll 16 as shown in the drawing while the rolling mill is in operation, and it is possible to move the cylinder 14 backward by operating the cylinder 14 as required for roll rearrangement and other purposes.

The distance between the two guide frames 3 is adjusted by engaging the screw shaft 12 arranged along the guide 11 with the guide frame 3 via a nut (not shown) and rotating the screw shaft in a desired direction. It can be carried out.

In the present invention, the pinch roll device 20 is provided at a position close to the work roll 16 of the side guide device 1 thus configured.

Details of the pinch roll device 20 will be described below with reference to FIGS. 3 is a side view, FIG. 4 is a vertical section, and FIG. 5 is a plan view.

The lower pinch roll 21 is rotatably mounted on a shaft 24 fixed to the pinch roll housing 23 in a cantilever manner via a bearing 27 and with its upper end aligned with the pass line PL.
Further, the upper pinch roll 22 is rotatably attached to a shaft 26 fixed to a holding block 25 in a cantilever manner. The holding block 25 can be moved up and down in the frame 23 'of the pinch roll housing 23 by the operation of the cylinder 28 and is guided by the guide surfaces 23a and 23b of the frame 23' as shown in FIG. The roll 22 can be raised and lowered while maintaining an accurate posture.

As shown in FIG. 3, the apron 3a attached to the guide frame 3 does not interfere with the lower pinch roll 21 and the upper guide plate 4a of the guide side plate 4 interferes with the lifting and lowering of the upper pinch roll 22. Each of them has a cutout so that it does not come out.

Further, as shown in FIG. 5, the guide side plate 4 is provided with a window 4b for mounting the pinch roll 20. In addition, the rolling mill side 4a 'of the upper guide plate 4a of the guide side plate 4 is higher on the pinch roll side than the lower end of the raised position (shown by the chain line in FIG. 3) of the upper pinch roll 22 so that the tip of the steel plate S can be sufficiently guided. I am doing it.

The pinch roll device 20 is configured as described above, and the pinch roll housing 23 is fixed to the guide side plate 4 by the bolt 29.
Fixed to.

Next, the use of the pinch roll device 20 will be described. The upper pinch roll 22 is on standby in the above-described raised position, and in this state, the tip of the steel plate S is guided to the work roll 16 to start rolling, On the way, meandering control is performed by one-side rolling down control or the like. After that, it is detected that the tail end of the steel sheet has slipped out of the rolling mill just before the side guide 1, for example, by a load cell (not shown) for measuring the rolling load of the rolling mill, and the cylinder 28 is detected by this slip-out signal. It is operated to lower the upper pinch roll 22 and hold both side edges of the steel plate. By restraining the steel plate S with the upper and lower pinch rolls 21 and 22 in this manner, the tail end of the steel plate S is moved upward and downward.
2 until the end of the steel plate S is the work roll 1
It is possible to apply tension to the steel plate S up to the vicinity of 6, and the meandering control can be continued. The upper pinch roll 22 may raise the work roll 16 when the tail end of the steel plate slips out.

Although the trailing slip signal of the rolling mill just before the side guide 1 is used in the above description, the trailing slip prediction signal of the immediately preceding rolling mill based on the tracking of the tail end of the steel plate S may be used. Further, in this case, instead of issuing the descending command to the upper pinch roll 22 at the same time as slipping out of the tail, the command may be issued earlier with some allowance for the descending required time.

This pinch roll device 20 can exert its effect sufficiently even if it is provided at a right angle to the center of the line.
As shown in the figure, the opposing roll tips can be inclined by θ in the traveling direction of the steel plate in the horizontal plane to further improve the effect. By inclining the pinch rolls in the horizontal plane in this manner, a tensile force is applied to both side ends of the steel sheet, so that the steel sheet itself has a centering function. It is preferable that θ be in the range of 2 ° to 10 °.

<Effects of the Invention> By carrying out the present invention, even at the tail end of the material to be rolled, the tension can be maintained almost to the end, so that the meandering control can be carried out effectively in its entirety and an accident due to narrowing can be prevented. It was possible to greatly reduce it, and it was possible to contribute to the improvement of the yield and the operating rate.

[Brief description of drawings]

FIG. 1 is a side view showing an outline of a side guide of the present invention, and FIG. 2 is a similar plan view. 3 to 5 are detailed views of the pinch roll device used in the present invention, and FIG. 3 is a side view,
FIG. 4 is a vertical sectional view and FIG. 5 is a plan view. FIG. 6 is a plan view showing the relationship with the side edge of the material to be rolled when the pinch roll is tilted in the horizontal plane. 1 …… Side guide device, 3 …… Guide frame, 16 ……
Work roll, 21 …… Lower pinch roll, 22 …… Upper pinch roll, S …… Rolled material

Claims (2)

[Claims] 1. A side guide provided on the entrance side of a post-rolling mill of a hot continuous finish rolling mill, at a position inside opposite guide frames on the left and right sides and close to the work rolls of the post-rolling mill. The guide frame is provided with a cantilevered fixed lower pinch roll and an upper pinch roll that can be raised and lowered, based on the trailing edge signal or trailing edge prediction signal of the material to be rolled in the rolling mill immediately before the side guide,
A side guide for a hot continuous rolling mill, characterized in that the upper pinch roll is lowered to hold both side edges of the material to be rolled to prevent narrowing of the tail end of the material to be rolled. 2. A side guide for a hot continuous rolling mill according to claim 1, wherein each of the pinch rolls is installed with its inner end inclined in the horizontal direction of the steel sheet in a horizontal plane.