JPH0756081Y2 - Rolling stand - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing roll, an intermediate roll having a curved concavo-convex contour capable of axial movement adjustment,
BACKGROUND OF THE INVENTION An intermediate roll and / or a small-diameter work roll, which is composed of a small-diameter work roll whose horizontal deflection can be adjusted, relates to an improvement of a rolling stand capable of roll bending. As a pair of upper and lower intermediate rolls,
A six-stage rolling stand for axially moving and adjusting a curved roll having the same uneven profile is disclosed in JP-A-57-918.
No. 07 publication. In this way, a rolling mill that forms curved uneven contours on the intermediate roll and only moves and adjusts in the axial direction has only the effect of correcting the quadratic curve component of the plate crown, removing the higher-order curve component, or However, it is difficult to remove the composite elongation. On the other hand, small diameter work roll bending,
Alternatively, the effect of intermediate roll bending is primarily on the plate edges, but has a higher order curvilinear component, thus axially adjusting the roll with the same curved contour profile. When used in combination with this, it is possible to remove the quadratic curve component to the higher-order curve component of the plate crown, and the shape controllability is dramatically improved. On the other hand, as a rolling mill that uses a small-diameter work roll to reduce rolling reaction force and rolling torque and has excellent shape controllability, a small-diameter work up and down displaced from the axial plane formed by the axes of the upper and lower reinforcing rolls. The rolls are each supported by a split support roll via a horizontal intermediate roll, the bearings of the split support rolls being supported on the contact surface of the support bridge, the position of the contact surface for the bearing being relative to the center of the support bridge. Japanese Patent Publication No. 46-6176 discloses a multi-stage rolling stand which is variable according to a symmetrically extending bending line, and the horizontal deflection of a small-diameter work roll is adjusted by this mechanism. In this multi-stage rolling stand, the ratio of the horizontal deflection of the small-diameter work roll converted to vertical deflection is about 1/10 to 10
It is about 1/20, and the local deformation that occurs inside the board in the width direction has a small absolute amount, so the shape correction effect is sufficiently exerted, but to correct the plate edge shape and improve the edge drop, the correction is necessary. Insufficient amount. Further, in a multi-stage rolling mill having a shape control function, split backup rolls are provided, bearing members of the split backup rolls are provided on the sides of the rolls of the split backup rolls, and are appropriately shifted in the direction along the rolling line. A rolling mill has been proposed in which a fluid pressure cylinder that moves a bearing member toward a provided roll is provided for each bearing member, and a sensor that detects a piston position of the fluid pressure cylinder, pressure, or both is provided. (For example,
However, the lower work roll chock that constitutes this rolling mill is supported by the inner chock of the intermediate roll and has a structure that cannot move in the horizontal direction. Furthermore, since each split backup roll is rotatably supported by a common shaft, the rigidity of the shaft provides a large resistance to pressing, and the width of the split backup roll is affected by the left and right split backup rolls. It is not possible to control the shape with high accuracy, and in order for each split backup roll to make uniform contact with the lateral intermediate roll, the diameter of each split backup roll must be maintained the same, making roll diameter management difficult. there were. The object of the present invention is to control the shape of the central portion of the plate crown by adjusting the axial movement of the intermediate roll having a curved uneven profile, and to roll the plate crown by roll bending of the intermediate roll and / or the small diameter work roll. It is possible to provide a rolling stand that has a wide range of shape control characteristics, as well as a fine local correction of the rolled material that cannot be completely removed by the former two due to the control of the material end portion and the horizontal bending action of the small diameter work roll. To do. The structure of the present invention for solving the problems of the prior art has a pair of small-diameter work rolls 1, 2, intermediate rolls 5, 6 and reinforcing rolls 21, 22 in the vertical direction.
In the multi-stage rolling stand having the above-mentioned intermediate rolls 5 and 6, the intermediate rolls 5 and 6 have the same curved contour, and the mounting positions are displaced by 180 ° from each other, and are provided symmetrically with respect to the upper and lower points. Slidably configured so that the pair of upper and lower small-diameter work rolls 1 and 2 are the intermediate rolls 5, 6,
While being displaced to one side from a common axial plane that passes through the axial centers of the reinforcing rolls 21 and 22 vertically, the roll bodies of the small-diameter work rolls 1 and 2 are horizontally horizontal intermediate rolls 7 and 8.
Is supported by the split support rollers 9 and 10 through the above, while the split support rollers 9 and 10 are used for the small-diameter work.
Sliding shaft with key having an axis orthogonal to the axes of rolls 1 and 2
Each axle box 14 and 15 is equipped with 12 and 13 and can be made independent
The shaft boxes are rotatably supported by the shafts 9a and 10a provided,
Outside of the keyed sliding shafts 12 and 13 provided in 14 and 15
The end face is a support bridge provided on the stand housing 16.
Built in 17 and 18, the axis slides with each key
For pushing out divided support rollers that match the axis of shafts 12 and 13.
The cylinders 19 and 20 of the
The rollers 9, 10 are arranged such that their positions can be changed according to bending lines extending symmetrically with respect to the centers of the support bridges 17, 18 , and the intermediate rolls 5, 6 and / or the small-diameter work rolls are arranged. 1, 2 and 1 are roll bendable. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the details of the embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of the rolling stand of the present invention, FIG. 2 is a front view of roll arrangement, FIG. 3 is an enlarged vertical front view of essential parts, and FIG. 4 is a transverse section of the lower roll assembly. In FIGS. 2 and 3, the small-diameter work rolls 1 and 2 which are vertically corresponding to each other are intermediate roll chocks 3 and 4, respectively.
Are disposed between the upper and lower intermediate rolls 5 and 6 which are supported on the upper and lower sides, and the axes of both the small-diameter work rolls 1 and 2 are aligned with a vertical axis plane passing through the axial centers of the upper and lower intermediate rolls 5 and 6. It is displaced laterally. Further, on the outer side in the displacement direction of the small-diameter work rolls 1 and 2, a large number of divided support rollers 9 and 1 are provided via small-diameter horizontal intermediate rolls 7 and 8.
0s are serially arranged. Also, the small-diameter work rolls 1, 2
And the small-diameter horizontal intermediate rolls 7 and 8 and the split support rollers 9 and 10 are rotatably supported, and the small-diameter work rollers 1 and 2 are supported by the support head 11 respectively.
Further, each of the divided support rollers 9 and 10 is provided with a keyed sliding shaft 12 and 13 having an axis orthogonal to the axes of the small-diameter work rolls 1 and 2, and is provided for each independent axle box 14 and 15. The shafts 9a and 10a are rotatably supported. The key-equipped sliding shafts 12 provided on the shaft boxes 14 and 15,
The outer end face of 13 is built in the support bridges 17 and 18 provided in the rolling stand housing 16, and the cylinders for pushing out the divided support rollers whose axes match the axes of the keyed sliding shafts 12 and 13, It is faced with 20. 21 and 22 are reinforcing roll chocks 23 and 2
A pair of upper and lower reinforcing rolls are supported by 4, and the central axes of the reinforcing rolls 21 and 22 are on a vertical axis plane passing through the axial centers of the intermediate rolls 5 and 6. In the figure, reference numeral 25 is a reduction cylinder, and 26 and 27 are reinforcing roll balance cylinders, which are used when the small-diameter work rolls 1 and 2 and the intermediate rolls 5 and 6 are replaced. In the figure, 28, 29, 30, and 31 are intermediate roll bending cylinders. Also, in the figure 32,
33 is a mounting bracket for the split support roller shaft boxes 14 and 15;
34, 35 and 43 are project blocks, 36 is a path line adjusting device used when replacing the small diameter work rolls 1 and 2 and the intermediate rolls 5 and 6, 37 and 38 are claws for supporting the small diameter work rolls, 39 , 40, 41 and 42 are intermediate roll outer chocks. Further, according to the present invention, the upper and lower intermediate rolls 5 and 6 have a curved concave contour 5 as shown in FIGS.
a and 6a and convex contours 5b and 6b connected to the a and 6a are formed, and the mounting positions of the intermediate rolls 5 and 6 are arranged symmetrically with respect to each other by being displaced 180 ° from each other. Further, since the intermediate rolls 5 and 6 can be axially moved and adjusted in directions opposite to each other, the intermediate roll inner chocks 3 and 4 can be adjusted with respect to the intermediate roll outer chocks 39, 40, 41 and 42. It is arranged so as to be slidable, and a cylinder (not shown) is attached to the chocks 3 and 4 in the intermediate roll to adjust the movement. It is also possible to easily add work roll bending in the same manner as this. According to the configuration of the present invention as described above, the following effects can be obtained. (A) The plate shape control over the entire width of the rolled material can be effectively performed by the correction action of the quadratic curve component of the plate crown by adjusting the axial movement of the intermediate roll having the curved uneven contour, and the intermediate roll and / or Rolling that cannot be removed by the former two due to the horizontal bending effect of the small diameter work roll, as well as the correction control of the higher-order curve component of the plate crown by the roll bending action of the small diameter work roll can control the plate shape of the rolled material end Fine local modifications throughout the material can be effective. (B) axial shift of the intermediate roll with curved contour,
Horizontal deflection of small diameter work roll, intermediate roll, and /
Alternatively, the inseparable organic coupling of the roll bending action of the small-diameter work rolls not only provides a rolling stand having a very wide range of shape control characteristics, but in particular, in the present invention, each split support roller is attached to each axle box. In addition to being rotatably supported by independently provided shafts 9a and 10a,
Since each axle box is connected to a sliding shaft with a key having an axis perpendicular to the axis of the small-diameter work roll, a cylinder for pushing out the divided support rollers to be built into the support bridge is arranged at the outer end of this sliding shaft. As in the prior art, the rigidity of the shafts 9a and 10a does not become a resistance, and it is not affected by the pushing action of the other divided supporting rollers, so that the shape controllability of the rolled material can be greatly improved. At the same time, it is easy to control the roll diameter. (C) An ideal amount (large plate crown) and time (high responsiveness) can be reasonably achieved. (D) High-speed rolling, which was not possible with the prior art, is possible and high productivity can be improved. (E) Thin work rolls and hard-to-work materials can be rolled by the small-diameter work rolls, and productivity can be improved.

[Brief description of drawings] FIG. 1 is a side view of a rolling stand of the present invention. FIG. 2 is a front view of a roll arrangement. FIG. 3 is an enlarged vertical sectional front view of a main part. FIG. 4 is a transverse cross-sectional view of the lower roll set, which is the same as the above. [Explanation of symbols] 1 small diameter work roll 2 small diameter work roll Chock in the middle roll 4 Chock in the middle roll 5 Intermediate roll 6 Intermediate roll 5a concave contour 6a concave contour 5b Convex contour 6b Convex contour 7 Horizontal intermediate roll 8 horizontal intermediate rolls 9 split rollers 10 split rollers 9a axis 10a axis 11 Support head 16 Rolling stand housing 17 Support bridge 18 Support bridge 19 cylinders 20 cylinders 21 Reinforcing roll 22 Reinforcing roll

Claims (1)

[Claims for utility model registration] A pair of small-diameter work rolls (1) in the vertical direction,
(2), intermediate rolls (5), (6), reinforcing rolls (2
In a multi-stage rolling stand having (1) and (22), the two intermediate rolls (5) and (6) have the same curved contours, and the mounting positions are displaced by 180 ° from each other to move up and down. The work rolls (1) and (2) are provided in point symmetry and are slidable in the axial direction, and the pair of upper and lower work rolls (1) and (2) are the intermediate rolls (5), (6) and the reinforcing roll (21). , (2
It is displaced to one side from a common axial plane that passes vertically through the axis of 2), and the roll barrels of both small diameter work rolls (1), (2) are horizontally intermediate rolls (7), ( 8)
Dividing the support roller via the (9), (10) is supported by the other hand, the divided support rollers (9), (10)
Is orthogonal to the axes of the small diameter work rolls (1) and (2).
Equipped with a keyed sliding shaft (12), (13)
In addition, the axis provided for each independent axle box (14), (15)
(9a), (10a) is rotatably supported by a shaft,
The sliding shaft with key (1) provided in (14) and (15)
The outer end faces of 2) and (13) are attached to the stand housing (1
Built in the support bridges (17) and (18) provided in 6).
And the axis of each keyed sliding shaft (12), (1
Cylinder for extruding divided support rollers which coincides with the axis of 3)
Face the dashes (19) and (20), and divide the support
Supporters (17), (1)
8) The position is variable according to the bending line extending symmetrically with respect to the center of 8), and the intermediate rolls (5), (6) and / or the small diameter work rolls (1), ( A rolling stand characterized in that 2) is roll bendable.