JPS6313603A - Rolling mill - Google Patents

Abstract

PURPOSE:To deal with rolling of a relatively wide range of thicknesses from thin to thick sheet materials by permitting the use of one unit of rolling mill as a rolling mill to be commonly used as six high mill and four high mill by changing rolls. CONSTITUTION:Cylinders 8 for work roll benders are built into stationary frames 10 fixed to a rolling mill housing 1 and intermediate roll bending cylinders 9 are built into movable guide blocks 11, 12 supported to the frames 10 movably in the roll axial direction. The intermediate rolls 4, 5 of such six high mill move in the roll axial direction simultaneously with the movable guide blocks 11, 12. One unit of the rolling mill can be changed from the six high mill to the four high mill or from the four high mill to the six high mill and is thus selectively used by using the frames 10 and the movable guide blocks 11, 12 as they are and changing the roll assembly.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a rolling mill having a pair of upper and lower work rolls, an intermediate roll, and a reinforcing roll, and a rolling mill having a pair of upper and lower work rolls and a reinforcing roll. The present invention relates to a rolling mill that also serves as a rolling mill, and particularly relates to an NF motion guide block that slides and guides rolls.

[Conventional technology]

In the conventionally commonly used four-high rolling mill, which has a pair of upper and lower work rolls and reinforcing rolls, bending of the work rolls is widely used as a means of controlling the shape of the rolled material. The reality is that there is a limit to the ability to modify the shape of the machine, and that sufficient effects cannot be achieved, especially when the width of the rolled material changes significantly. For this reason, in conventional rolling equipment, some degree of shape deterioration has been accepted as inevitable, or measures have been taken to change the initial crown of the roll by replacing the work roll each time the width of the rolled material changes. However,
In any case, the ability to modify the shape of rolled material was low and inefficient.

Japanese Patent Publication No. 52-26508 and Japanese Unexamined Patent Publication No. 56-6 as a rolling machine that greatly improved the ability to modify the shape of rolled material.
No. 6307, this rolling mill moves the intermediate roll in a six-high rolling mill or the work roll in a four-high rolling mill in the roll axis direction, and moves the end or tip of the roll to the side edge of the rolled material. By placing it at the same position as or in the vicinity of the rolled material, shape control is performed as if it were supported by a reinforcing roll having a roll crown amount that corresponds to the width of the rolled material. Further, by moving the rolls in the axial direction in response to changes in rolling conditions due to changes in rolling reduction, heat crown of the rolls, etc., rolling with a good shape is possible without providing an initial crown on the work rolls. Furthermore, it is provided with means for applying a roll pending force to the work roll and the intermediate roll,
It has a wider shape control ability.

However, in the 6-high rolling mill, the width of the rolled material is wider,
As the material becomes thinner and harder, the diameter of the work roll needs to be reduced in order to achieve even stronger reduction rolling, making it unsuitable for rolling relatively thick materials. Further, as the diameter of the work roll becomes smaller, horizontal deformation of the work roll occurs during rolling, and there is a concern that this may adversely affect the shape of the rolled material.

[Problem that the invention seeks to solve]

According to the above-mentioned conventional technology, the thickness range of the rolled material to be rolled is 6-wall rolling mill, J-9 rolling mill is thin material, and 4-high rolling mill J'i is thick material. This was uneconomical, as separate rolling equipment was required depending on the thickness of the material to be rolled.

[1-1j of the present invention, one rolling mill can be used as both a 6-high rolling mill and a 4-high rolling mill in order to accommodate a relatively wide range of plate thicknesses from thin materials to thick materials. It is in.

[Means for solving problems]

In order to achieve this objective, a 6-high rolling mill using a small-diameter work roll is used for rolling thin and wide materials, and a 4-high rolling mill using a large-diameter work roll is used for rolling thick materials. By rearranging the rolls, one rolling mill can be used as a 6-high rolling mill and a 4-high rolling mill.
It is used as a rolling mill that also serves as a multi-purpose rolling mill.

[Effect]

In order to make it possible to roll a relatively wide range of rolling materials from thin to thick materials, the intermediate roll shifting device and intermediate roll bending device in the six-high rolling mill are equipped with four
The structure has a structure that can be used both as a work roll shifting device and a work roll bending device in a high-speed rolling mill, and the work rolls, intermediate rolls, and reinforcing rolls for a 6-high rolling mill are assembled into the work rolls and reinforcing rolls for a 4-high rolling mill. Alternatively, by changing the rolls for a 4-high rolling mill to the rolls for a 6-high rolling mill, it is possible to combine the use of a 6-high rolling mill and a 4-high rolling mill.

〔Example〕

Embodiments according to the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of a six-high rolling mill according to the present invention.

This rolling mill includes a pair of upper and lower work rolls 2, 3 that directly roll the rolled material, a pair of upper and lower intermediate rolls 4, 5 that support the rolls 2.3, and further supports the rolls 4, 5. A roll arrangement is made up of a pair of upper and lower reinforcing rolls 6.7, and by moving the intermediate rolls 4 and 5 in opposite directions in the roll axis direction, the intermediate roll 4
．． 5 and the work rolls 2, 33 and reinforcing rolls 6.7, thereby adjusting the roll contact length between the work rolls 2, 33 and the reinforcing rolls 6.7.
3, the load distribution of the rolling force applied to the rolled material is eliminated at the end of the work roll that does not come into contact with the intermediate roll, thereby preventing the work rolls 2 and 3 from bending due to the rolling load.
It is configured to do so.

In addition, this rolling mill is equipped with a work roll bending device and an intermediate roll bending device as a shape control device for the rolled material, and a cylinder 8 for the work roll bending device.
is a fixed frame 10 fixed to the rolling mill housing 1
The intermediate roll bending cylinder 9 is installed in a movable guide block 11, 12 which is supported on a fixed frame 10 so as to be movable in the direction of the roll axis lj.

The intermediate rolls 4 and 5 in this six-high rolling mill are moved in the roll axis direction by a roll shift device (not shown) at the same time as the movable guide blocks 1.1 and 1.2 incorporating the intermediate roll bending cylinder 9. be.

FIG. 2 shows an embodiment of a four-high rolling mill according to the present invention.

In this rolling mill, a roll arrangement is comprised of a pair of upper and lower work rolls 13.14 that directly roll the rolled material and a pair of upper and lower reinforcing rolls 15.16 that support the rolls 13.14.

Here, the work rolls 13 and 14 are movably engaged at the same time as movable guide blocks 11 and 12 which are movably supported by the fixed frame 10 in the roll axis direction in the six-high rolling mill.

That is, in the four-high rolling mill shown in FIG. 2, the work rolls 1.3.14 are movable in the roll axis direction at the same time as the movable guide block 11.12, similar to the intermediate roll 4.5 in FIG. , movable guide block 11.1
The structure is such that the shape of the rolled material can be controlled by the roll bending cylinder 9 incorporated in the roll bending cylinder 2.

By rearranging the roll assembly, it is possible to change from a 6-high rolling material mill to a 4-high rolling mill, or from a 4-high rolling mill to a 6-high rolling mill. Fixed frame 10 and movable guide block 11. ．． 1.2 has a structure that can be used as is for any rolling mill.

〔Effect of the invention〕

According to the present invention, a 1.6-high rolling mill can be used. Therefore, it is possible to provide a rolling mill with high performance in controlling the shape of rolled material due to the axial movement structure of intermediate rolls such as work rolls and intermediate roll bending devices, and it is possible to produce high quality rolled materials.

2. In a four-high rolling mill, the work roll bending device and the axial movement structure of the work rolls improve the ability to correct edge drops of the rolled material, and prevent local wear of the work rolls and reduce the damage caused by the rolled material. Breakage prevention can be measured.

3. By rearranging the rolls, a 6-high rolling mill and a 4-high rolling mill can be used for different purposes.
The shape of the rolled material can be well controlled by the rolling schedule according to the rolled material.

Additionally, since it is a dual-purpose rolling mill, equipment costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a front view of a six-high rolling mill according to an embodiment of the present invention, and FIG. 2 is a front view of a four-high rolling mill. 1... Rolling mill housing, 2, 3... Work roll,
4゜5...Intermediate roll, 6,7...Reinforcement roll, 8
... Work roll bending cylinder, 9 ... Intermediate roll bending cylinder, 10 ... Fixed frame, 11.12 ... Movable guide block, 13.1
4...Work roll, 15.16...Reinforcement roll.

Claims (1)

[Claims] 1. Rolling conditions are set using a rolling mill that has a pair of upper and lower work rolls, an intermediate roll, and a reinforcing roll, and a rolling mill that has a pair of upper and lower work rolls and a reinforcing roll. In a dual-purpose rolling mill that can be rearranged according to changes in the rolling mill, the intermediate roll is moved and adjusted in the roll axis direction,
In addition, the movable guide block equipped with a roll bending device for controlling the shape of the rolled material is also used as a movable guide block equipped with a roll bending device for adjusting the movement of the work roll described later in the roll axis direction. Characteristic rolling mill.