JPH0683849B2 - Multi-stage rolling mill - Google Patents

Description

The present invention relates to a rolling mill, and more particularly, to a multi-high rolling mill having two or more rolling stages and a two-high rolling mill used for the purpose of improving glossiness. A rolling mill that can

[Conventional technology]

FIG. 3 shows a roll of a conventionally used 6-high rolling mill and an arrangement of bearing boxes thereof. In the figure, the work rolls 6 and
An intermediate roll 4 and a reinforcing roll 2 are arranged so that a reaction force generated between a pair of the work rolls 6 during rolling is supported by the mill housing 1 surrounding each roll via each roll. . The work roll 6, the intermediate roll 4, and the reinforcing roll 2 respectively have a receiving box.
7, 5, 3 are attached, and the work roll 6, the intermediate roll 4, and the reinforcing roll 2 are in surface contact with each other,
The respective bearing boxes 7, 5, 3 are fixed to the mill housing 1.

When the 6-high rolling mill configured as described above is switched to the 2-high rolling mill for gloss finishing, as shown in the figure, the lower-stage reinforcing roll 2 and its bearing box 3 are moved downward, After forming the gap between the rolls, each roll is extracted from the mill housing 1. As shown in FIG. 2, a two-stage rolling mill is configured by incorporating one gantry 11 and a pair of gloss finishing work rolls 9 into the mill housing 1. In addition,
The bearing box of the work roll 9 is integrally attached, and the work roll 9 is exchanged together with this bearing box as in the case of other rolls.

[Problems to be Solved by the Invention]

However, in this way, the 6-high rolling mill capable of switching to the 2-high is capable of pulling out or putting in all the rolls or pedestals in the mill housing 1 at the time of switching from the 2nd to the 6th and from the 6th to the 2nd. Therefore, there is a problem that the work becomes very complicated because it has to be done, and this point was not taken into consideration. Incidentally, in the above-mentioned conventional technique, the pedestal 11 is used as a member to be interposed between the work roll 9 for gloss finish and the mill housing 1 because the roll surface of the work roll 9 is different from that of the strip. This is because the contact between the two is avoided and the mirror surface is not damaged.

Therefore, an object of the present invention is to provide a multi-high rolling mill which can be easily switched to a double-high rolling mill.

[Means for Solving the Problems]

In view of such circumstances, the present inventor has thought to reduce the number of members for extraction and insertion as much as possible,
At that time, it is premised that the work roll 9 for gloss finish avoids contact with members other than the strip on its roll surface.

That is, according to the present invention, in the mill housing, a plurality of rolls are arranged in multiple stages in contact with the bearing box in the vertical direction of the strip transport direction, and the rolls are taken out to provide a work roll for gloss finishing. In a multi-high rolling mill that can be used as a two-high rolling mill by incorporating, only the roll that replaces the work roll for gloss finish is extracted, the other rolls are left, and the replaced work roll for gloss finish The remaining rolls are such that the contact of the rolls is hindered by the contact of each bearing box.

[Action]

In the multi-high rolling mill configured in this way, when switching to the 2-high rolling mill, it is sufficient to pull out only the roll to be replaced with the work roll for gloss finish, and then to incorporate only the work roll. Extremely easy.

In addition, the work roll for finishing gloss has a request to avoid contact with members other than strips, such as a reinforcing roll, because the bearing box is made longer in the vertical direction than the conventional one. The work roll can be dealt with by preventing the work roll from coming into contact with other rolls.

〔Example〕

FIG. 1 is a configuration diagram showing an embodiment of a multi-high rolling mill according to the present invention, and particularly shows a configuration diagram when switching to a 2-high rolling mill. At first glance, this figure seems to be a four-high rolling mill, but the reinforcing rolls 2 other than the work roll 9 for gloss finishing have no original function. That is, the work roll 6 and the intermediate roll 4 of the 6-high rolling mill shown in FIG. 3 are extracted, and the work roll 9 for gloss finish incorporated therein is a bearing box 10 integrated with the work roll 9. Is formed to be long in the upward direction in the drawing, so that the roll surface is arranged without contacting the roll surface of the reinforcing roll 2.

Therefore, the work roll 9 for finishing the gloss can perform the function of its main body without damaging its mirror surface.

Further, the original purpose of the present invention is achieved by positioning the reinforcing roll 2 at that position at all.

In the embodiment described above, the bearing box 10 of the work roll 9 for gloss finish is increased in the upward direction in the drawing to avoid contact between the work roll 9 and the reinforcing roll 2. Needless to say, this can be achieved even if the length of the bearing box 3 of the reinforcing roll 2 is increased downward in the drawing.

〔The invention's effect〕

According to the present invention, it is possible to obtain an effect that switching of a multi-high rolling mill to a double-high rolling mill is extremely simple.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a multi-high rolling mill according to the present invention, and in particular, a configuration diagram when switching to a 2-high rolling mill,
FIG. 2 is a configuration diagram when a conventional multi-high rolling mill is switched to a two-high rolling mill, and FIG. 3 is a configuration diagram of a conventional multi-high rolling mill. 1 ... Mill housing, 2 ... Reinforcing roll, 3 ... Reinforcing roll bearing box, 4 ... Intermediate roll, 5 ... Intermediate roll bearing box, 6 ... Working roll, 7 ... Working roll bearing box, 9
…… Glossy finish work roll, 10 …… Glossy finish work roll Bearing box, stand …… 11.

Claims (1)

[Claims] 1. In a mill housing, a plurality of rolls are arranged in multiple stages in contact with a bearing box in the vertical direction of the strip transport direction, and the rolls are taken out and a work roll for gloss finish is incorporated. Therefore, in a multi-high rolling mill that can be used as a two-high rolling mill, only the roll that replaces the work roll for gloss finish is withdrawn, the other rolls remain, and the replaced work roll for gloss finish remains. The multi-stage rolling mill is characterized in that the contact of the roll surface is blocked by the contact between the bearing boxes.