JPH01237011A - Crown control apparatus for split reinforced roll - Google Patents

Abstract

PURPOSE:To reduce the manufacturing cost of the title roll and to quicken roll exchange by coupling the split reinforced roll to a roll supporting shaft supported freely turnably to a reinforced roll frame through an eccentric section. CONSTITUTION:The roll supporting shaft 1 is supported freely turnably to the reinforced roll frame 3. Eccentric bushes 5a, 5b, 5c having different eccentricities respectively are provided on the fitting parts of plural split reinforced rolls of supporting shaft 1 right and left symmetrically with respect to the central part in the shaft center direction of the supporting shaft 1. The split reinforced rolls 23a, 23b, 23c are coupled with these bushes. By this method, the manufacturing cost of the split reinforced rolls are reduced and the exchange of rolls is quickened.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application> The present invention relates to a device for adjusting the crown pattern of split reinforcing rolls in a multi-stage cluster rolling mill.

<Prior art> Fig. 7 is a conceptual side view showing an example of a tandem rolling facility equipped with a series of multi-stage cluster rolling mills that are capable of high-reduction rolling and control of plate shape with high precision, and Fig. 8 is a conventional example. A side conceptual diagram showing an example of the arrangement of each roll of these rolling mills,
FIG. 9 is a sectional view taken along line IX-IX in FIG. As shown in FIG. 7, the strip steel W fed from the payoff reel D is sequentially reduced in thickness by high reduction rolling by the first rolling mill A, the second rolling mill B, and the final rolling mill C. The shape of the plate is controlled with high precision and wound on a tension reel E. As shown in FIG. 8, a work roll 21 and a pair of intermediate rolls 22 that support the work roll 21 are disposed above and below the steel strip W, respectively. Supporting divided reinforcing rolls 23a-2
3C1 and the auxiliary split reinforcing roll 24, respectively. -7,
It is pivoted to support shafts 27 and 29.

In the conventional device, as shown in FIG. 9, the roll support shaft 27 is fixed to a saddle portion 31a of a reinforcing roll frame 31 housed in a housing (not shown). A center reinforcing roll 23a is equipped with a rolling bearing 26a via a fitted damaged bushing 25a, and an eccentric bushing 25 is rotatably fitted.
A quarter reinforcing roll 23b and a side reinforcing roll 23c are equipped with rolling bearings 26b and 26c via b and 25c.
and are each attached to a shaft. Reference numeral 28 denotes a lever fixed to each of the broken bushes 25b and 25c, and a roller 37 pivoted to a rack par 36 is loosely fitted into the bifurcated portion at the tip thereof. A pinion 35 supported by the reinforcing roll frame 31 meshes with the rack par 36, and a sector gear 34, which is fixed coaxially with the pinion 35 and rotates together, drives each hydraulic actuator 32 installed on the reinforcing roll frame 31. It meshes with a gear (not shown) fixed to the shaft 33. Each hydraulic actuator 32 has a rotation angle detector 32b.

32c is provided. Although FIG. 9 shows the exit side in the traveling direction of the steel strip W, the same side is also configured symmetrically to the above, and the hydraulic actuator 32 is driven on the entry side via a sector gear on the entry side (not shown). The device is also powered. As a result, the rack par 36 is moved in its axial direction by the rotation of the pinion 35 by the drive of the hydraulic actuator 32, and rotates each of the damaged bushes 25b and 25c by a predetermined angle via the roller 37 and lever 28. By moving the quarter reinforcing roll 23b and the side reinforcing roll 23c away from the roll support shaft 27, a predetermined crown pattern is formed, thereby controlling the shape of the rolled steel strip W.

Further, the crown adjusting device of the divided reinforcing roll below the band tr4W is constructed in substantially the same manner as described above, and operates in the same manner.

In order to change the crown pattern, instead of making the quarter reinforcing rolls 23b and side reinforcing rolls 23c eccentric, there is also a method in which only the center reinforcing rolls 23a and the quarter reinforcing rolls 23b are made eccentric.

<Problems to be Solved by the Invention> In conventional rolling equipment, a device as shown in FIG. 9 was used as a crown adjustment device for the upper and lower divided reinforcing rolls 23a to 23c of all multi-stage cluster rolling mills. The structure is complicated due to the large number of parts, and the reinforcement roll frame 3
1 had the disadvantage of being large in size.

In addition, a hydraulic actuator 32 and a rotation angle detector 32
b and 32c are installed on the reinforcing roll frame 31, so every time the divided reinforcing rolls 23a to 23c are rearranged, hydraulic actuator,
, 32c, etc., hydraulic hoses, electric wires, their connectors, etc., must be attached and detached, and there are problems that impede speedy roll change operations.

By the way, in the case of a tandem rolling facility using a multi-stage cluster rolling mill as shown in FIG. 7, for example, the first rolling mill A and the second rolling mill are divided into various types. It is possible to obtain the desired plate shape of the steel strip W without using the III-strong crown pattern. Also, in the last stage rolling mill C of the tandem rolling equipment mentioned above and the reverse rolling mill, either the upper or lower divided reinforcing rolls are provided with a round adjustment device as shown in Fig. 9, and the other one is equipped with one type of split reinforcing roll. It has been confirmed that it is possible to roll a strip 1IpiW having a highly accurate plate shape simply by adjusting the crown pattern.

The present invention has been made in view of these circumstances,
It is an object of the present invention to provide a split reinforcing roll crown TA adjustment device that is designed to downsize and simplify rolling equipment and to speed up round roll changing operations.

<Means for Solving 814.> The split reinforcing roll crown adjustment device according to the present invention for achieving the above-mentioned object comprises upper and lower work rolls that clamp a rolled material, and a work roll on at least one side of the work rolls. a multi-tiered reinforcing roll that is divided into a plurality of parts in the roll axis direction and is rotatably attached to a reinforcing roll frame via a roll support shaft, each of which supports the intermediate roll; In the cluster rolling mill, the roll support shaft is rotatably supported on the reinforcing roll frame, and the mounting portions of the plurality of divided reinforcing rolls of the roll support shaft are attached to the right and left sides with respect to the center in the axial direction of the roll support shaft. It is characterized in that eccentric parts having different eccentricities are provided symmetrically, and the split reinforcing roll is pivotally attached to the eccentric parts.

Function> When the roll support shaft is rotated to the required angular position, the split reinforcing roll moves forward and backward relative to the intermediate roll according to the amount of damage at each eccentric part, making it symmetrical with respect to the axial center of the roll support shaft. A crown pattern of split reinforcing rolls is formed.

Further, by changing the rotational angle position of the roll support shaft, the amount of movement of the split reinforcing roll in the direction of the intermediate roll changes, and the crown pattern thereof changes.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6. The same members as those in the conventional device shown in FIG. omitted.

In FIGS. 1 and 2, 1 is a roll support shaft;
It is rotatably attached to the saddle portion 3a of the reinforcing roll frame 3 via a bearing 2, and its drive side end is connected to an external drive source (not shown) via a spindle 10 having a universal joint. 5a is a concentric bushing provided at the center of the roll support shaft 1, and 5b and 5C are eccentric bushings arranged symmetrically on the roll support shaft 1, each serving as a returning portion having a different amount of eccentricity as shown in FIG. Both of them are fitted onto the roll support shaft 1 with a key 6. The concentric bushing 5a has a center reinforcing roll 23a equipped with a rolling bearing 26a, and the damaged bushings 5b and 5c have four 1-1 strong rolls 23b and side reinforcing rolls 23c equipped with rolling bearings 26b and 26c, respectively. is attached to the shaft.

The state shown in FIGS. 1 and 2 shows the flat pattern A shown in FIG. 5, and from this state the roll support shaft 1
For example, when rotated by 45 degrees, both the left and right quarter reinforcing rolls 23b are rotated b1t!, as shown by the broken lines in FIG. Then, the site reinforcing roll h 23 c moves upward by cl in accordance with the center amount of the eccentric bushings 5b, 5c (7) fi, and the divided reinforcing rolls 23a to 23c form a symmetrical intermediate crown pattern B.

In addition, as shown in FIGS. 3 and 4, the roll support shaft 1
When rotated by 90 degrees from the state shown in FIGS. 1 and 2, the quarter reinforcing roll 23b becomes, for example, 150 μm+aax, and the side reinforcing roll 23c becomes, for example, 500 μm.
It moves upward by c wax such as μm, and a symmetrical crown pattern C with the maximum amount is formed.

In this way, the roll support shaft 1
is rotated at an appropriate angle within the maximum rotation angle of 90° to move the quarter reinforcing roll 23b and the side reinforcing roll 23c in the direction of the intermediate roll 22, thereby forming an optimal crown pattern for controlling the plate shape of the band 1jlW. do.

In addition, FIG. 1 shows the split reinforcing roll 2 on the exit side of the strip W of the rolling mill.
Although the cross sections of 3a to 23c are shown, the divided reinforcing rolls 23a to 23c on the doujin side are constructed almost symmetrically to the above and function in the same way.

Furthermore, although FIG. 6 shows a second embodiment of the present invention,
As shown in FIG. 6, the broken bush 5b may be provided only on the quarter reinforcing roll 23b. According to this, the rotation of the roll support shaft 1 causes the flat pattern A to be
to W-shaped intermediate crown pattern B2. A maximum crown pattern C2 can be formed.

Therefore, by employing the crown adjusting device of the present invention, for example, in the upper and lower split reinforcing rolls of the first rolling mill and the second rolling mill of a tandem rolling facility, and by using the final stage rolling mill having the conventional crown adjusting device, - By controlling the plate shape with high precision, it becomes possible to roll high-quality steel strips in the same manner as before. Furthermore, even when the final stage rolling mill or the reverse rolling mill is employed in either the upper or lower divided reinforcing rolls, highly accurate plate shape control can be achieved. In this case, by adopting the crown adjustment device of the present invention, the height of the reinforcing roll frame can be reduced. It is more effective to use the lower split reinforcing roll because the timing bit can be used at a shallow depth.

Incidentally, in the present invention, as in the above-mentioned embodiment, the roll support shaft 1
The method is not limited to the method of fitting the concentric bushing 5a and the damaged bushings 5b and 5c, but also, for example, the concentric part and eccentric part to which the split reinforcing rolls 23a to 23c are attached are integrated with the roll support shaft 1. Alternatively, eccentric portions having different amounts of eccentricity may be provided at the shaft attachment portions of all the split reinforcing rolls 23a to 23c.

<Effects of the Invention> As described in detail below with reference to examples, according to the present invention, a roll support shaft is rotatably supported on a reinforced roll frame, and the roll support shaft is divided through an eccentric portion. Since the reinforcing rolls are shaft-mounted, the amount of damage of each split reinforcing roll can be easily marked by simply rotating the roll support shaft using a drive source outside the rolling mill and a rotation angle detector, and a predetermined roll pattern can be formed. This allows the plate shape of the rolled material to be controlled. This eliminates the need for the conventional single rotation device for the break center pusher built into the reinforcing roll frame, allowing the reinforcing roll frame to be made smaller and simpler, and the height from the bottom of the rolling mill to the position where the rolled material passes is low. Therefore, the installation bit can be made shallower, and the manufacturing cost and foundation construction cost can be significantly reduced. In addition, when recombining split reinforcing rolls, the rotation drive source and rotation angle detector for the broken bushings are not attached to the reinforcing roll frame, so there is no need to attach or detach hydraulic hoses, Wi-wires, etc. Roll reshuffling can be speeded up.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing a crown adjustment device for split reinforcing rolls on the rolled material exit side of a multi-stage cluster rolling mill according to an embodiment of the present invention, and FIG. 2 is a roll support of concentric and eccentric bushings and split reinforcing rolls. An explanatory diagram showing an eccentric state with respect to the axis,
3 is an explanatory diagram showing a state in which the roll support shaft in FIG. 2 has been rotated 90 degrees, FIG. 4 is a longitudinal sectional view showing a state in which the roll support shaft has been rotated 90 degrees from the state in FIG. 1, FIG. 5 is an explanatory diagram showing a crown pattern of a split reinforcing roll by the crown 11 adjustment device of the present invention, and FIG. 6 is an explanatory diagram showing a crown pattern of another embodiment. 7 is a conceptual diagram showing an example of tandem rolling equipment using a conventional multi-stage cluster rolling mill, FIG. 8 is a conceptual side view showing the arrangement of each roll of the multi-stage cluster rolling mill of FIG. Figure 9 is I of Figure 8.
X-]X sectional view. In the drawing, 1 is the roll support shaft, 3 is the reinforcing roll frame, 5a is the concentric bushing, 5b is the quarter bushing, 5C is the side bushing, 21 is the work roll, 22 is the intermediate roll, and 23a is the center. l! + strong roll, 23b is a quarter reinforcement roll, 23c is a side reinforcement roll, and W is a steel band.

Claims (1)

[Claims] Upper and lower work rolls that clamp and press the rolled material; an intermediate roll that is located on at least one side of the work roll and supports the work roll; In a multi-stage cluster rolling mill, the reinforcing rolls are rotatably supported by the reinforcing roll frame, and each of the plurality of roll supporting shafts is rotatably supported by the reinforcing roll frame. The split reinforcing roll is provided with eccentric parts having different eccentricities symmetrically with respect to the axial center of the roll support shaft at the attachment part of the split reinforcing roll, and the split reinforcing roll is pivotally attached to the eccentric part. Split reinforcement roll crown adjustment device.