JPH0622722B2 - Roll device and rolling mill equipped with the roll device - Google Patents

Description

The present invention relates to a roll device and a rolling mill equipped with the roll device.

[Conventional technology]

In recent years, rolling mills as shown in FIGS. 14 and 15 are being put to practical use in order to reduce the edge drop and improve the cross-sectional shape of the rolled material. In the figure, (a) and (b) are a pair of upper and lower work rolls, (c) and (d) are a pair of upper and lower work rolls that reinforce the upper and lower work rolls (a) and (b), and (e) and (f) are work. Axle box that rotatably supports rolls (a) and (b), (g) and (h) are fitted into axle boxes (e) and (f), and abut on support guide part (j) of housing block (i) for work. A piston adapted to impart roll balance or roll bending to the rolls (a) and (b), (k) (l) is connected to a side portion of the axle box (e) (f), and the axle box (e) ( f) via work rolls (a) (b)
Is a roll shift device for shifting the shaft in the axial direction.

In the above rolling mill, during rolling, the work rolls (a) and (b) are mutually shifted in the axial direction by the roll shift device (k) (l) through the shaft boxes (e) and (f), and the work rolls ( Align one end of a) with one end of the rolled material (m), and match the end of the work roll (b) opposite the work roll (a) with the other end of the rolled material (m). Then, rolling is performed while imparting roll balance or roll bending to the work rolls (a) and (b) by the pistons (g) and (h).

[Problems to be solved by the invention]

However, in the above conventional device, the roll shift device (k) (l) is attached to the rolling mill housing, which complicates the structure and makes it difficult to replace the work rolls (a) and (b). When shifting the work rolls (a) and (b), the piston
(g) (h) slides on the support guide part (j) of the housing block (i), so that the pistons (g) and (h) are twisted
(g) (h) and packings may be damaged, and the roll arm bending control is difficult to perform because the moment arm length from the center of the rolling mill to the piston differs depending on the work roll shift position. Atsuta

In view of the above-mentioned circumstances, the present invention has a simple structure so that the rolling rolls can be easily replaced, and moreover, the roll balance or the roll bending cylinder is not twisted, and the roll bending control is performed. The purpose is to make it easy to do.

[Means for solving problems]

In the present invention, the rolling roller is rotatably supported by the bearing fitted in the bearing case, and the bearing case is fitted in the axial box so as to be movable in the axial direction, and the rolling is performed on the axial box via the bearing case. A roll device equipped with a roll shift device for shifting the roll in the axial direction is provided, and such a roll device is used as a predetermined roll among a work roll, a reserve roll, and an intermediate roll to configure a rolling mill. ing.

[Work]

Therefore, in the present invention, rolling is performed with the rolling rolls being shifted to the required positions during rolling.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show a first embodiment of the roll device of the present invention,
Both ends of the rolling roll (1) were rotatably supported by the bearing (3) housed in the bearing case (2) so that it could slide on the inner wall of the window of the rolling mill housing (4). The bearing case (2) is fitted to the axle box (5) so that it can slide in the axial direction, and one of the axle boxes (5) is attached to the rolling mill housing (4). Due to
It clamps so that it slides up and down but does not move in the axial direction, and a roll shift device (7) of, for example, a fluid pressure cylinder type is provided on the shaft box (5), and the rod tip of the roll shift device (7) is installed. Is connected to the flange part (10) of the bearing case (2),
A piston (8) for roll balancing or roll bending is arranged on the upper and lower surfaces of the axle box (5), and one end side of the piston (8) is fitted into one of the upper and lower axle boxes (5) and the other end side. Abut the lower or upper axle box (5). In the figure, (9) is a spacer for fixing the axial position of the bearing (3) with respect to the bearing case (2).

When shifting such a rolling roll (1) in the axial direction, the roll shift device (7) pushes and pulls the bearing gate (2) in the axial direction. For this reason the bearing case
(2) The rolling roll (1) is shifted in the axial direction integrally with the bearing (3). At this time, the shaft box (5) does not move in the axial direction, and therefore the position of the piston (8) in the roll axial direction does not change, so that the piston (8) is not twisted during the shift, and the roll is not rolled. Since the bending position is unchanged, roll bending control is easy to perform.Furthermore, since the roll shift device (7) is not attached to the rolling mill housing (4) but is built in the axle box (5), the clamp (6 ) Is removed and the shaft box (5) is pulled out to the right in FIG. 1 together with the bearing case (2) and the rolling roll (1), so that the roll can be easily exchanged.

Furthermore, when the rolling roll (1) is shifted in the axial direction, the rolling roll (1) and the bearing case (2) are integrally shifted, so that between the rolling roll (1) and the bearing (3). No slippage occurs.

4 and 5 show a second embodiment of the roll device of the present invention. In this embodiment, the axle box (5) is fitted to the block (11) arranged on the inner wall of the window part of the rolling mill housing (4). Combine and roll on one of the left and right blocks (11)
Roll positioning device (12) that regulates the axial position of (1)
Are installed. That is, the vertical groove provided in the block (11)
A casing (14) is fitted in the (13) so as to be able to move up and down, and a worm nut (15) that can be rotated by a drive device and a worm (not shown) is housed in the casing (14). The screw shaft (16) is screwed onto the female screw portion provided on the shaft core of the nut (15) so that the tip of the screw shaft (16) can abut the side surface of the bearing case (2).

When the roll shift device (7) is a fluid pressure cylinder, the rolling roll (1) has two shift positions when the piston rod is extended most and when it is contracted, but by providing the roll positioning device (12), rolling is performed. The shift position of the roll (1) can be changed steplessly. That is, warm nut (1
When 5) is rotated, the screw shaft (16) moves back and forth in the axial direction without rotating, so the screw shaft adjusted to the specified position
By bringing the bearing case (2) shifted by the roll shift device (7) into contact with the tip of (16), the axial position of the rolling roll (1) can be adjusted steplessly. When replacing the rolling roll (1), remove the clamp (6) and
(5), bearing case (2), and rolling roll (1) are pulled out to the right in Fig. 4, but in this case, as shown in Fig. 5, the bearing case (2) is pulled from the tip of the screw shaft (16). Leave.

6 and 7 show a third embodiment of the roll device of the present invention, in which the screw shaft of the roll positioning device (12) is used.
While (16) is adapted to move forward and backward without rotating, in this embodiment, the screw shaft (16) is adapted to move forward and backward while rotating due to the rotation of the worm nut (15). That is, the cylindrical portion of the screw shaft (16) is fitted into the hole formed in the shaft core of the warm nut (15), and the key (17) is placed between the screw shaft (16) and the warm nut (15). The screw shaft (16) can be rotated together by the rotation of the warm nut (15), and the female shaft (5) is provided with a female screw (18) at the side end of the screw shaft (1).
The male screw part of 6) is screwed to the female screw (18), and the screw shaft (16) and the tip are brought into contact with the side part of the bearing case (2) via the thrust bearing (19). The roll positioning device (12), including that shown in FIG. 4, is provided with a synchronized lifting device such as a fluid pressure cylinder so that it can be moved up and down in synchronization with the elevating and lowering of the rolling roll (1).

In order to determine the axial position of the rolling roll (1), the screw shaft (1
When moving 6), the screw nut (16) is also rotated by rotating the worm nut (15). Screw shaft (16)
Since the male screw portion of is screwed to the female screw (18) of the shaft box (5), when the screw shaft (16) rotates, it is moved to a predetermined position in the axial direction by the female screw (18). If the screw shaft (16) moves in synchronization with the bearing case (2), etc., the screw shaft (16)
Since the thrust bearing (19) is interposed between the tip and the bearing case (2), the screw shaft (16) does not rub against the bearing case (2).

When the rolling roll (1) is replaced, the axle box (5), the bearing case (2), and the rolling roll (1) are integrally moved to the right in FIG. Since the screw shaft (16) is screwed onto the female screw (18) of the shaft box (5),
Pull out from the warm nut (15) as shown in the figure, and then into the axle box (5).
It is pulled out from the rolling mill together with.

Next, an example in which the above roll device is applied to a rolling mill is shown in FIGS.
It will be described with reference to FIG. 8 to 10 are examples applied to a four-high rolling mill, and FIGS. 11 to 13 are examples applied to a six-high rolling mill.

In FIG. 8, (21) and (22) are a pair of upper and lower work rolls, (23) and (24) are retaining rolls that reinforce the work rolls (21) and (22), and the work rolls (21) and (22) are One of the roll devices described in FIGS. 1 to 7 is used. When rolling the rolled material (20), the work rolls (21) and (22) are shifted in the opposite directions to perform rolling.

FIG. 9 shows a rolling mill in which both the work rolls (21) (22) and the retaining rolls (23) (24) are shifted and rolled. The work rolls (21) (22), the retaining rolls (23) ) In any of (24), any one of the above-described roll devices is used. Copy roll (23) (2
The shift direction of 4) is the same as that of the work rolls 21 and 22.

Fig. 10 shows that the work rolls (2
(1) and (22) are examples of not shifting.
(23) (24) is any one of the above-mentioned roll devices. The backup rolls (23) and (24) are shifted in opposite directions.

In Fig. 11, (25) and (26) are work rolls (21) and (22) and backup rolls (2
3) It is an intermediate roll interposed between (24) and it does not shift the intermediate rolls (25) (26) and the reserve rolls (23) (24) but shifts the work rolls (21) (22). This is an example.

FIG. 12 shows an example in which the work rolls (21) (22) and the intermediate rolls (25) (26) are shifted, and the work rolls (21) and the intermediate rolls (25) shift directions, the work rolls (22 ) And intermediate roll
The shift directions of (26) are the same.

FIG. 13 shows an example in which only the intermediate rolls (25) and (26) are shifted, and the shift directions of the intermediate rolls (25) and (26) are opposite to each other.

In the embodiment of the present invention, the roll shift device is a fluid pressure cylinder, and the case where the piston rod is connected to the flange attached to the center side end of the rolling mill of the bearing case has been described. It is also possible to attach a flange to the side and connect the piston rod of the fluid pressure cylinder to the flange so that the direction of the piston rod is opposite to that of each of the embodiments, and further to project the shaft connected to the shaft joint from the bearing case. Needless to say, various changes can be made without departing from the gist of the present invention.

〔The invention's effect〕

Since the roll device of the present invention and the rolling mill equipped with the roll device are configured as described above, it is possible to easily and quickly replace the rolling rolls, and for roll balance or roll bending during rolling roll shift. Since it is not necessary to shift the piston, even if the piston is provided, the piston will not be twisted, and therefore damage to the piston and packings can be prevented, and further roll balance and roll bending will be performed. However, since the roll balance or roll bending position is unchanged, the shape control of the cross section of the rolled material can be performed easily and reliably, and furthermore, there is no slip between the rolling roll and the bearing at the time of shift, so the bearing and Various excellent effects such as the possibility of damage to the roll can be achieved.

[Brief description of drawings]

FIG. 1 is an explanatory view of a first embodiment of a roll device of the present invention, FIG. 2 is a perspective view of the axle box portion of FIG. 1, and FIG. 3 is a fixed-side axle box of the axle box of FIG. Explanatory drawing of another example of the fixing means of FIG.
FIG. 6 is an explanatory view of a second embodiment of the roll device of the present invention, FIG. 5 is an explanatory view of a case where the rolling rolls of FIG. 4 are replaced, and FIG. 6 is an explanation of a third embodiment of the roll device of the present invention. FIG. 7 is an explanatory view when the rolling rolls of FIG. 6 are replaced, and FIG.
FIG. 10 shows four of the rolling mills of the present invention equipped with a roll device.
Explanatory drawing of 1st-3rd Example of a multi-stage rolling mill, FIGS. 11-13 is explanatory drawing of 1st-3rd Example of a 6-high rolling mill among the rolling mills of this invention equipped with the roll apparatus. 14 and 15 are explanatory views of a conventional rolling mill. In the figure, (1) is a rolling roll, (2) is a bearing case, (3) is a bearing, (5) is an axle box, (7) is a roll shift device, (8)
Is a piston, (12) is a roll positioning device, (21) and (22) are working rolls, (23) and (24) are backup rolls, and (25) and (26) are intermediate rolls.

Claims (2)

[Claims] 1. A bearing fitted in a bearing case rotatably supports a rolling roll, and the bearing case is fitted in a shaft box so as to be movable in an axial direction. A roll device equipped with a roll shift device for shifting a rolling roll in an axial direction. 2. A rolling mill provided with a pair of upper and lower work rolls and a pair of upper and lower retaining rolls for reinforcing the pair of work rolls, or a rolling mill in which an intermediate roll is interposed between the pair of upper and lower work rolls and retaining rolls. In the above, a predetermined roll is rotatably supported by the bearing fitted in the bearing case, and the bearing case is fitted in the shaft box so as to be movable in the axial direction. A rolling mill provided with a roll device equipped with a roll shift device for shifting a roll in an axial direction.