JPS62267004A - Rolling mill - Google Patents

Abstract

PURPOSE:To prevent the generation of slip flaws and to permit good rolling even in the case of a narrow-width strip by providing eccentric rings to eccentric rings parts at both ends of a backup roll supporting shaft and taking a large rate of eccentricity by a rotating mechanism. CONSTITUTION:The eccentric rings parts 18 are integrally formed to both ends of the back up roll supporting shaft 17 and side rolls 13C are freely rotatably supported in an eccentric state via the large eccentric rings 13 thereto. The rotating mechanism consisting of a sector gear 24 and a rack bar 25 is provided to each of the eccentric rings 23. The eccentric position of the eccentric rings 23 is largely swiveled by using the above-mentioned rotating mechanism to form a spacing C between the side roll 13C and intermediate roll 12 in the case of rolling the narrow-width strip. The generation of the slip flaws by the slippery rotation of the side rolls 13C is thereby eliminated and the good rolling is executed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a rolling mill in which a reinforcing roll is divided into a plurality of pieces along a direction parallel to its axis, and the crown can be adjusted.
In particular, it is possible to roll strip materials with a narrow width without any problems.

<Conventional Technology> In recent years, in the rolling field, there has been a demand for high-reduction rolling mills that can significantly reduce plate thickness in a single rolling process from the viewpoint of improving productivity and saving energy. On the other hand, requirements for plate thickness accuracy and shape are becoming increasingly strict. The multi-stage cluster rolling mill is what makes the above-mentioned high-reduction cold rolling possible.This multi-stage cluster rolling mill allows the work rolls to be made smaller in diameter, so it has the advantage of reducing the rolling load and enabling high reduction. On the other hand, it is known that when the diameter of the work roll is reduced, the bending deformation of the work roll due to the rolling load increases, resulting in poor shape of the rolled material.

Conventionally, the shape control means for this type of multi-stage Clasphe rolling mill was to divide it into multiple pieces in a direction parallel to the axis. It is known that the position of the axis of the 15-strong roll is relatively changed. As shown in FIG. 7, which shows an example of such a rolling mill, and FIG. 8, which shows its cross-sectional shape in the direction of the Through the reinforcing roll 104,1
The reinforcing roll 104 is supported by the center roll 104a and the quarter roll 104 in the illustrated example;
It is divided into five parts along the direction parallel to the axis: b and side roll 104C. Both ends of a reinforcing roll support shaft 1080 are attached to the saddle portion 107 of the chock 106, which can be displaced in a direction perpendicular to the strip plate 101. It is attached so that it can rotate freely. Also, quarter roll 104b and side roll 1
04c is the reinforcing roll support shaft 1 via the movable eccentric wheel 110
These movable eccentric wheels 110 are each integrally fixed with a sector gear 112 that meshes with a rack par 111 provided on the chock 106. The rack par 111 is driven by an actuator 113 installed on the +f chock 106 via a drive mechanism (not shown), and the eccentricity of the quarter roll 104b and side roll 104c is arbitrarily changed to properly hold the crown of the work roll 102. It has become.

<Problems to be Solved by the Invention> As shown in FIG. 8, when the reinforcing roll 104 is a split-type rolling mill, the distribution of the rolling load of the work roll 102 on the strip 101 is in the width direction of the strip 101. In a uniform state, the pending force of the quarter roll 104b is larger than the pending force of the side roll 104C against the intermediate roll 103 due to the bending rigidity of the chuck 106 that holds the reinforcing roll support shaft 108. Furthermore, it has a characteristic that the pending force of the center roll 104a is larger than the pending force of the quarter roll 104b. This tendency becomes more pronounced as the width of the band plate 101 becomes narrower. For example, in the case of a narrow material where both ends of the band plate 101 in the width direction do not reach between the vertically opposing side rolls 104C, It is impossible to avoid that the pending force of the side roll 104C against the roll 103 becomes smaller at the F1i end. As a result,
The contact pressure between the intermediate roll 103 and the side rolls 104c becomes smaller, causing the side rolls 104C to slip and rotate, leaving slip marks on these rolls 103 and 104c.
is formed. In such a case, slip marks will be transferred to the work roll 102 and damage the surface of the band plate 101, making it necessary to replace not only the intermediate roll 103 and the side rolls 104c but also the work roll 102. This will result in a serious loss.

In view of the above-mentioned problems in conventional rolling mills, the present invention prevents the occurrence of slip between the intermediate roll and some of the split reinforcing rolls even when rolling a narrow strip, thereby preventing large losses. The purpose of the present invention is to provide a rolling mill that is free from the risk of damage.

Means for Solving the Problems> The rolling mill according to the present invention provides reinforcement for pressing at least one work roll of a pair of upper and lower work rolls for rolling a strip through an intermediate roll. The reinforcing roll is divided into a plurality of pieces along the direction parallel to the axis thereof, and these divided reinforcing rolls are rotatably attached to the reinforcing roll support shaft. In a rolling mill in which the eccentric wheels are rotatably mounted on the respective eccentric wheels, and a rotating mechanism for these eccentric wheels is incorporated in the reinforcing roll teeth, both ends of the reinforcing roll support shaft are used as eccentric shaft parts. The amount of eccentricity of the eccentric wheel formed and attached to the return shaft portion is set to be greater than the sum of the amount of damage of the eccentric wheel and the eccentric shaft portion with respect to the reinforcing roll support shaft.

The eccentric wheel rotatably attached to the eccentric shaft is more eccentric to the reinforcing roll support shaft than other eccentric wheels, and the reinforcing roll attached to the eccentric on the eccentric shaft is When rolling a narrow strip that is not involved in rolling, the eccentric position of this eccentric wheel is moved away from the intermediate roll using a rotating mechanism to keep it out of contact with the intermediate roll to prevent slippage. .

Embodiment An embodiment will be described in which the rolling mill according to the present invention is applied to a rolling mill as shown in FIG. While pressing the reinforcing roll 13, one reinforcing roll 16 is pressed against the lower work roll 15 facing the upper work roll 11 with the strip plate 14 sandwiched between the three upper reinforcing rolls 13. The structure is divided into five parts, each parallel to its axis.

The reinforcing roll according to this example has a first
As shown in the figure, a center roll 13a, a pair of quarter rolls 13b sandwiching the center roll 13a, and a pair of end rolls 1 located at the end of the shaft.
3c, and is rotatably supported by a reinforcing roll support shaft 17. Eccentric shaft portions 18 are integrally formed at both ends of the reinforcing roll support shaft 17, and the ends of the eccentric shaft portions 18 are fixed to the saddle portion 20 of the chikonoku 19. A center roll 13a is rotatably mounted on the reinforcing roll support shaft 17 via a fixed eccentric wheel 21 at the center of the reinforcing roll support shaft 17 with an eccentricity of a constant I, and a quarter roll adjacent to the center roll 13a 13b is small eccentric wheel 2
2, it is rotatably mounted eccentrically to the reinforcing roll support shaft 17. Further, an etroll 13c is attached to the eccentric shaft portion 18 via a large eccentric ring 23 so as to be rotatable eccentrically with respect to the eccentric shaft portion 18. A sector gear 24 is integrally provided on each of the small eccentric wheel 22 and the large eccentric @ 23, and a rack par 25 that meshes with these sector gears 24 is inserted into the chock 19 so as to be able to reciprocate in a direction parallel to the direction in which the strip plate 14 passes. It is assembled. These rack pars 25 are driven by an actuator (not shown), and the rack pars 25 are driven by an actuator (not shown). 13i22 and the large eccentric wheel 23 can be rotated to any desired turning position. In addition, in this example, sector gear 2
4 and the rank par 25 are used as the rotation mechanism for the eccentric wheels 22 and 23, but it is of course possible to use other known mechanisms.

As shown in FIGS. 3 and 4, the amount of eccentricity of the axis O1 of the return shaft portion 18 with respect to the axis 0 of the reinforcing roll support shaft 17 is el, Fixed eccentric wheel 21
The center of gravity of the axis 02 and the axis O1 of the small eccentric wheel 22 is set to 0.
2, the eccentricity of the axis 04 of the large eccentric wheel 23 with respect to the axis 0 of the return shaft portion 18 is 8 in this embodiment, e, +
It is set to e2.

Therefore, in this embodiment, the axis of the small eccentric wheel 22 and the large eccentric wheel 23 is set to 0 at the eccentric position of the fixed eccentric wheel 21. ．． By matching 04, center roll 13a and quarter roll 1
3b and the side roll 13c can be set concentrically as shown in FIG. Adjust the rolling blade of the strip plate 14.

In addition, by appropriately rotating the small eccentric wheel 22 and the large eccentric wheel 23 from this state, the eccentric positions of the quarter roll 13b and side roll 13c with respect to the sender roll 13a are changed to set a pendenting pattern corresponding to the desired roll crown. Be able to do it. For example, the small eccentric wheel 22 and the large eccentric wheel 23 are changed from the state shown in FIG. 3 to θt! as shown in FIG. 4. When the work roll 1 is rotated, a drum-shaped roll crown is formed such that the distance to the intermediate roll 12 is farther from the side roll 13c than the center roll 13g.
1 will be given. Furthermore, if the width of the band plate 14 is narrower than the interval between the left and right side rolls 13c, the large eccentric wheel 2
3 from this state, the side roll 13c is completely separated from the intermediate roll 12, and a gap C is formed between the intermediate roll 12 and the side roll 13c, causing them to slip. There is no possibility of causing marks etc.

Although this embodiment has been explained with reference to a rolling mill as shown in Fig. 2, it can of course be applied to other types of rolling mills as shown in Figs. 5 and 7. In the drawings, members having the same functions as those in FIG.

Further, in this embodiment, the reinforcing roll 13 is of a two-divided type, but the number of divisions can of course be other than this, and therefore, the number of rolls each attached to the eccentric shaft portion 18 can be set to two or more. It is possible. Furthermore, it is sufficient that the eccentricity 8 of the large eccentric wheel 23 is greater than or equal to the sum of the eccentricity e of the small eccentric wheel 22 and the eccentricity e1 of the eccentric shaft portion 18, but it is better to set it as in this embodiment, since the side There are many advantages such as being able to easily adjust the position of the roll 13c.

<Effects of the Invention> According to the rolling mill of the present invention, an eccentric shaft portion is formed at the shaft end of the reinforcing roll support shaft, and the divided reinforcing rolls are rotatably attached to the eccentric shaft portion through an eccentric ring having a large eccentricity. As a result, the shift amount for the intermediate roll can be set to be significantly larger than that for the reinforcing roll, and when rolling a narrow strip, the reinforcing roll can be retracted from the intermediate roll to provide a non-contact method. It was possible to maintain the condition. Therefore, the occurrence of slip marks can be prevented and a good rolling operation can be performed.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the structure of the main parts of an embodiment of a rolling mill according to the present invention; FIG. 2 is a conceptual diagram of the entire other parts; FIGS. Fig. 5 and Fig. 6 are conceptual diagrams showing other examples of rolling mills, Fig. 7 is a conceptual diagram showing a part of the rolling mill that is the subject of the present invention, and Fig. 8 is a conceptual diagram showing a part of the rolling mill. A sectional view taken in the direction of arrows. Also, in the figures, 11.15 is a work roll, 12 is an intermediate roll, 13 is a reinforcing roll, 13a is a center roll,
13b (more automatic roll, 13c is side roll, 1
4Lt band plate, 17 is a reinforcing roll support shaft, 18 is an eccentric shaft portion, 19 is a chock, 21 is a fixed width core line, 22t, f small eccentric wheel, 23 is a large eccentric wheel, 24 tit sex gear, 25
The rack bar 10 is the axis center of the reinforcing roll support shaft, Ol, t
i is the axial center of the center axis portion, 02 is the axial center of the fixed return shaft, 0. 04 is the axis of the small eccentric shaft, and 04 is the axis of the large O-glaze. Figure 3 Direction of intermediate roll 12 Figure 45 Collection 6 Figure Collection 7

Claims (1)

[Claims] A reinforcing roll is provided on at least one of a pair of upper and lower work rolls for rolling the strip, and the reinforcing roll is pressed against this one work roll via an intermediate roll, and the reinforcing roll is pushed in a direction parallel to the axis of the reinforcing roll. The reinforcing rolls are divided into a plurality of pieces along the axis, and each of the divided reinforcing rolls is rotatably attached to a plurality of eccentric wheels which are rotatably attached to the reinforcing roll support shaft, and the rotation mechanism of these eccentric wheels is rotated as described above. In the rolling machine built into the reinforcing roll chock,
Both ends of the reinforcing roll support shaft are formed as eccentric shaft portions, and the eccentricity of the eccentric wheel attached to the eccentric shaft portion is greater than or equal to the sum of the eccentric amounts of the eccentric wheel and the eccentric shaft portion with respect to the reinforcing roll support shaft. A rolling mill characterized by being set to.