JPS6358049B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a rolling mill having a function of controlling the shape of a rolled material.

[Prior art] In recent years, various methods of bending work rolls in four-high rolling mills have been developed and implemented in order to control the thickness profile of rolled materials in the width direction. There was a limit to the ability to control the shape of the

In other words, when rolling a plate from a narrow width to a wide width, the desired roll profile is not uniform and changes depending on the width of the plate, and simply changing the roll bending of the work rolls is insufficient to obtain the ideal roll profile. It was hot.

In addition, in order to obtain rolled products with a good shape and little change in thickness, especially in the width direction, it is necessary to minimize changes in the work roll due to the rolling load, and to increase the shape modification ability by providing an optimal roll profile. It is important to.

[Object of the Invention] In view of the above-mentioned circumstances, the present invention has been made for the purpose of providing a rolling mill with an improved function of controlling the cross-sectional shape of a rolled material.

[Structure of the Invention] In the present invention, the intermediate roll interposed between the work roll and the backing roll is a split roll divided in the axial direction, and a predetermined split roll among the split rolls is set according to the width of the rolled material. The basic structure is that the work roll can be removed by pressing the roll, and in addition, it is equipped with a roll bending device that applies roll bending to the work roll. Therefore, the rolled material has a good cross-sectional shape without edge drops.

[Examples] Examples of the present invention will be described below with reference to the accompanying drawings.

Figures 1 to 3 show an embodiment of the present invention.
2 is a work roll, 3 and 4 are backup rolls, and a roll bending device 5 is provided on the shaft portions of the work rolls 1 and 2. Also, work roll 1,
2 and the backup rolls 3 and 4 are intermediate rolls 6,
7 are arranged. The intermediate rolls 6, 7 are formed of a plurality of split rolls 6a, 7b divided in the axial direction, and fluid pressure cylinders 8, 9 are connected to each split roll 6a, 7a, respectively. , 7a can each be moved separately in a direction parallel to the traveling direction of the rolled material s.

For example, when rolling a wide rolled material s, all the divided rolls 6 are
a, 7a as work rolls 1, 2 and backup rolls 3, 4
The roll bending device 5 applies roll bending to the work rolls 1 and 2, and rolling is performed while controlling the roll profile to a desired state (see FIG. 2).

In addition, when rolling a narrow rolled material s, the fluid pressure cylinders 8 and 9 are operated to roll the divided rolls 6.
The split rolls 6a and 7b on both sides of a and 7a are removed from between the work rolls 1 and 2 and the backing rolls 3 and 4, and rolling is continued while controlling the roll profile of the work rolls 1 and 2 using the roll bending device 5. (See Figure 3). By rolling in this way, the work rolls 1 and 2 are
The only part that is deformed is the part that contacts the split rolls 6a and 7a, and the shape control function for the work rolls is improved, so even in the case of a narrow plate, it is possible to obtain a product with a good cross-sectional shape without edge drops. can.

FIG. 4 shows another embodiment of the present invention, in which the divided rolls 6a, 7a can be reciprocated in the axial direction by appropriate means. The divided roll 6
a, 7a as work rolls 1, 2 and backup roll 3,
When it moves back and forth in the axial direction while being held in place by 4,
Since the split rolls 6a, 7a reduce roll marks on the outer peripheries of the work rolls 1, 2, no roll marks are left on the rolled material s, making it possible to obtain an even better product.

In the embodiments of the present invention, the case where the upper and lower intermediate rolls are used as split rolls has been explained, but it is also possible to use only one of the upper and lower middle rolls as a split roll, and the roll bending device is not provided. It goes without saying that various modifications may be made without departing from the gist of the embodiments.

[Effects of the Invention] According to the rolling mill of the present invention, the function of controlling the roll profile of the work rolls is improved, so that the excellent effect of improving the cross-sectional shape of the rolled material can be achieved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the rolling mill of the present invention;
Figure 2 is a front view of Figure 1 and is an explanatory diagram when rolling a wide plate, Figure 3 is a front view of Figure 1 and is an explanatory diagram when rolling a narrow plate, and Figure 4 is a front view of the book. FIG. 6 is an explanatory diagram of another embodiment of the invention. In the figure, 1 and 2 are work rolls, 3 and 4 are backup rolls, 5 is a roll bending device, 6 and 7 are intermediate rolls, 6a and 6b are divided rolls, and 8 and 9 are fluid pressure cylinders.

Claims (1)

[Claims] 1. An intermediate roll disposed between a work roll and a backing roll is divided in the axial direction to form a plurality of divided rolls, and each divided roll is individually placed between the work roll and a backing roll. A rolling mill characterized in that it is configured to be able to be put in and taken out. 2. An intermediate roll disposed between the work roll and the backing roll is divided in the axial direction to form a plurality of split rolls, and each split roll is constructed so that it can be individually moved in and out between the work roll and the backing roll. A rolling mill characterized in that it is equipped with a roll bending device that imparts roll bending to work rolls.