JPH1076301A - Roll shift type rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll shift type rolling mill with which a sheet crown is controllable in a wide range and an edge drop is prevented. SOLUTION: Upper and lower tapered work rolls 12 which have tapering tapered parts 13 in the end parts of the opposite sides each other and the wholes of which are slender cylindrical shapes and upper and lower support rolls 14 with which the rolling reaction force of a rolled stock is supported by bringing into contact with the work rolls and which have crowns provided with the convex part and concave part which are continued in point symmetry each other are provided. The tapered work rolls 12 and support rolls 14 are respectively shiftable in their axial directions. By shifting the support rolls 14, the sheet crown of the rolled stock is controlled through the work rolls 12 by the crowns of the support rolls 14 and, by shifting the tapered work rolls 12, the edge drop in the edge parts of the rolled stock is prevented with the tapered parts of the work rolls 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll-shift type rolling mill for rolling a sheet material by shifting upper and lower work rolls alternately in an axial direction.

[0002]

2. Description of the Related Art In order to obtain a flat plate product by controlling the rolling shape of a rolled plate, various rolling means have been conventionally proposed and implemented as schematically shown in FIG. FIG. 3 (A)
"Shape Controlled Rolling Method" (JP-B-60-51921)
Moves the upper and lower work rolls 1 (work rolls)
Is moved in accordance with the width of the work roll to position both edges of the rolled plate 2 in the tapered grinding area 1a of each of the upper and lower work rolls, and a phenomenon that both ends become thinner (edge drop).
Can be prevented. In this figure, reference numeral 3 denotes a backup roll (copy roll).

A roll-shift type rolling mill shown in FIG. 3B (Japanese Patent Publication No. 63-62283) rolls a sheet material 2 with upper and lower work rolls 1 alternately shifted in the axial direction of the rolls. In addition, the plate crown can be controlled in a wide range by the unevenness curve provided in advance on the work roll 1. Japanese Unexamined Patent Publication No. Sho 60-206508 discloses a "work roll bearing box for a rolling mill" which is a roll rolling mill in which a roll bend is added to the roll shift type rolling mill shown in FIG. This is an example, and the controllability of the sheet crown can be further improved by adding bending moments to both ends of the work roll 1.

[0004]

In the rolling means shown in FIG. 3 (A), the edge drop can be prevented by the tapered grinding area 1a of the work roll 1, but the waving phenomenon that the flatness is reduced and the work roll There was a problem that the control of the plate crown caused by the bending of the plate was hardly possible.

In the conventional roll shift shown in FIG. 3B, the waving phenomenon can be suppressed and the sheet crown can be controlled, but there is a problem that the edge drop is hardly effective. Furthermore, in a rolling mill using both roll shift and roll bend, the roll crown can be quickly controlled by using roll bend together,
There was a problem that the edge drop had little effect.

The present invention has been made to solve such a problem. That is, an object of the present invention is to provide a roll shift type rolling mill capable of controlling a sheet crown in a wide range and preventing edge drop.

[0007]

According to the present invention, there is provided a work roll having a tapered upper and lower taper at opposite ends and a generally elongated cylindrical shape, and a rolled material in contact with the work roll. An upper and a lower support roll having a crown having a convex portion and a concave portion that support a rolling reaction force and are point-symmetrical to each other, and the tapered work roll and the support roll can be shifted in the axial direction, respectively. By this, the support roll is shifted, the crown of the roll is controlled by the crown of the support roll via the work roll, and the tapered work roll is shifted by shifting the tapered work roll. A roll shift type rolling mill is provided which prevents edge drop of a plate end portion of a material.

[0008] According to a preferred embodiment of the present invention, the support roll is a backup roll or an intermediate roll.

According to the configuration of the present invention, the function of the crown roll shift mill is given to the support roll (intermediate roll or backup roll) and the function of the taper shift roll is given to the work roll. The crown can be controlled by axially shifting the point symmetric crown rolls of the support rolls in opposite directions.
In addition, the edge drop can improve the edge of the plate edge by moving the tapered portion to the edge of the plate due to the vertical shift of the tapered work roll.

[0010] Therefore, the strip crown (body crown) and the shape of the rolled material can be formed by a support roll (intermediate roll or backup roll), and the edge drop at the strip end can be independently controlled by combining a taper roll shift. Control, which allows the cross-sectional profile of the plate to be rolled to the desired shape, significantly improving productivity and improving yield.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In the drawings, common parts are denoted by the same reference numerals. FIG. 1 is an overall configuration diagram of a roll shift type rolling mill according to the present invention,
(A) is a case where the support roll 14 is an intermediate roll.
(B) shows a case where the support role 14 is a backup role. Support roll 1 as shown in this figure
4 may be either an intermediate roll or a backup roll.

FIG. 2 is a diagram schematically showing each roll of FIG. 1 (A). As shown in FIGS. 1 and 2, a roll shift type rolling mill 10 of the present invention includes upper and lower tapered work rolls 12 and upper and lower support rolls 14. In FIGS. 1 and 2, the size of the crown and the like is exaggerated in order to clearly show the operation of each roll.

1 and 2, upper and lower tapered work rolls 12 have tapered tapered portions 1 at opposite ends.
3 and has an elongated cylindrical shape as a whole. The size of the tapered portion 13 is, for example, 5 mm in the axial direction.
About 0 to 100 mm, the decrease in diameter is, for example, 0.4 to
It is about 0.5 mm. Further, the diameter of the work roll 12 is preferably formed to be sufficiently small so that it can be easily deformed along the crown of the support roll 14. Further, the upper and lower tapered work rolls 12 can be axially shifted in mutually opposite directions by a shift mechanism (not shown). A well-known mechanism in a conventional roll shift type rolling mill can be applied to this shift mechanism.

The upper and lower support rolls 14 are in contact with the work roll 12 to support the rolling reaction force of the rolled material, and have a crown having a convex portion and a concave portion that are point-symmetrically continuous with each other. This crown is large enough to control the strip crown of the rolled material through the work roll,
In addition, it is set within a range where the surface pressure between the rolls does not become excessively high. Further, the upper and lower support rolls 14 can be axially shifted in mutually opposite directions independently of the work rolls 12. As this shift mechanism, a work roll shift mechanism in a conventional roll shift type rolling mill can be applied.

With the above configuration, the support roll 14
(The intermediate roll in this example) is shifted to control the sheet crown of the rolled material 2 by the crown of the support roll 14 via the work roll 12, and the tapered work roll 12 is shifted by shifting the tapered work roll 12. In the portion 13, edge drop at the plate end of the rolled material 2 can be prevented.

That is, according to the present invention, the function of the crown roll shift mill is given to the support roll 14 (intermediate roll or backup roll), and the function of the taper shift roll is given to the work roll 12. Can be controlled by axially shifting the point-symmetric crown rolls of the support rolls 14 in opposite directions, and the edge drop can be controlled by the mutual shift of the tapered work rolls 12 up and down. By moving the tapered portion 13 in the above manner, it is possible to improve the plate end crown.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.

[0018]

According to the roll shift type rolling mill of the present invention described above, the strip crown (body crown) and shape of the rolled material can be formed by a support roll (intermediate roll or backup roll), The edge drop of
The combination can be controlled independently by the combination of the taper roll shift, whereby the cross-sectional profile of the plate can be rolled into the desired shape, and the productivity can be greatly improved and the yield can be improved.

Therefore, the roll-shift type rolling mill of the present invention has excellent effects such as control of the sheet crown in a wide range and prevention of edge drop.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a roll shift type rolling mill according to the present invention.

FIG. 2 is a view schematically showing each roll of FIG. 1;

FIG. 3 is a schematic view of a conventional rolling mill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Work roll 1a Tapered grinding area 2 Plate material 3 Backup roll 10 Roll shift type rolling mill 12 Work roll 13 Tapered taper part 14 Support roll 16 Backup roll

Claims (2)

[Claims] A work roll having a tapered upper and lower taper at an end opposite to each other and having a generally elongated cylindrical shape; a roll contacting the work roll to support a rolling reaction force of a rolled material; And upper and lower support rolls having a crown having a convex portion and a concave portion continuous with the work roll, and the tapered work roll and the support roll can be respectively shifted in the axial direction. Shift and control the crown of the rolled material by the support roll crown via the work roll, and shift the tapered work roll to prevent edge drop of the rolled material plate end at the tapered part of the work roll A roll-shift type rolling mill. 2. The system according to claim 1, wherein the support roll is a backup roll or an intermediate roll.
The roll-shift type rolling mill according to 1.