JPH0735602Y2 - Rolling stand - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a rolling stand. 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, the rolling mill that forms the curved uneven contour on the intermediate roll and only adjusts the movement in the axial direction cannot remove the correction effect of the quadratic curve component of the plate crown, or removes the higher-order curve component, or However, it is difficult to remove the composite elongation. On the other hand, the effect of the work roll bending or the intermediate roll bending is mainly for the plate end portion, but it has a higher-order curve component, and therefore the roll having the same curved uneven profile as described above is used. If it is used together with the movement adjustment in the axial direction, the plate crown can be removed up to the quadratic curve, and the shape controllability is dramatically improved. In addition, like other conventional rolling stands, in a structure that prevents the work roll from bending by simply shifting the work roll horizontally according to the rolling direction, when the work roll diameter becomes extremely small, problems such as occurrence of vibration occur. It cannot be used because it has. As a means for solving such a problem, a multiple roll stand as disclosed in Japanese Patent Publication No. 46-6176 has been proposed. This is one in which side support devices are installed in one direction in the horizontal direction of the upper and lower work roll cylinder lengths, but this rolling stand has an economical problem that the initial cost increases significantly, and the structure Is complicated and difficult to maintain, especially work rolls with widely different diameters are difficult to use, and on the side with the supporting device, there is a space limitation in supplying coolant for cooling the rolls. is there. Further, in a multi-stage rolling mill having a shape control function, split backup rolls are provided, and a bearing member of the split backup rolls is provided on each side of the rolls.
A fluid pressure cylinder that moves the bearing member toward the roll provided by appropriately shifting in the direction along the rolling line is provided for each bearing member, and the piston position of the fluid pressure cylinder or the pressure,
Alternatively, a rolling mill has been proposed in which a sensor that detects both of them is provided to control the shape. (For example, JP-A-5
According to this rolling mill, the effect of being able to correct a higher-order plate crown is recognized, but since a large number of split backup rolls are arranged over the entire width of the rolled material, There is the inconvenience that the mark is transferred to the rolled material, and in addition the structure becomes complicated.
In addition, the offset position is constant, and it is difficult to control by changing the rolling conditions such as when the rolling direction changes in the forward and reverse directions. However, there is still a problem that it cannot be secured. It has been proposed that a multi-stage rolling mill is provided with a means for imparting a roll bending action to work rolls and intermediate rolls. (For example, JP-A-58-1
In such a rolling mill, the correction effect of the quadratic curve component of the plate crown by the intermediate rolls and the correction effect on the plate end portion by the roll bending action are recognized, but rolling by a small work roll is possible. In addition, there is an inconvenience that the ability to correct higher order components of the plate crown is insufficient and the composite elongation cannot be corrected. An object of the present invention is to expect an excellent plate shape control function by adjusting the relative positional relationship between the horizontally moving block and the support roller and the bending force of the small diameter work roll, and to provide an intermediate plate having a curved uneven profile. By correcting the quadratic curve component of the plate crown by adjusting the axial movement of the roll, the shape control of the central part of the rolled material, the roll bending of the intermediate roll and / or the work roll of a small diameter The purpose of this is to economically provide a rolling stand in which the correction action controls the edge of the rolled material and the horizontal deflection action of the small-diameter work roll allows local correction of the quarter portion that cannot be removed by the former two. . The structure of the present invention which solves the problems of the prior art has a pair of small-diameter work rolls 1, 2, intermediate rolls 5, 6, reinforcing rolls 15, 16 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 180 ° from each other so as to be symmetrical with respect to the upper and lower points. The intermediate rolls 5 and 6 are arranged so as to be slidable in the axial direction through intermediate roll chocks 3 and 4, and the intermediate rolls 5 and 6 are configured to be roll bendable in the vertical direction. 1,
2 is configured so that the work roll chocks 7 and 8 supporting them can be moved and adjusted in the rolling direction by horizontal moving blocks 9 and 10 that sandwich the work roll chocks 7 and 8 from both sides, and the small diameter work rolls 1 and 2 also have a vertical bending action. Support rolls 25 and 26 for sandwiching the small work rolls 1 and 2 in the rolling direction from the outer sides of both end edges of the rolled material are provided at the long end portions of the work rolls 1 and 2. The rollers 25 and 26 are configured so that they can be moved and adjusted in the rolling direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the embodiments of the present invention will be described with reference to the drawings. 1 is a front view of each roll arrangement, FIG. 2 is a side view of FIG. 1, FIG. 3 is a side view, FIG. 4 is a cross-sectional view taken along the line AA in FIG. 1, and FIGS. FIG. 6 is a partially cutaway plan view of a main part showing a state of the support roller when the diameter is switched to a diameter. The structure of the roll assembly will be described with reference to FIGS. 1 to 3.
It is arranged between the intermediate rolls 5 and 6 arranged above and below which are supported by the intermediate roll chocks 3 and 4, and in the standard state, the axes of both the small diameter work rolls 1 and 2 are the axial centers of the upper and lower intermediate rolls 5 and 6. It lies on the plane of the vertical axis passing through. Further, both ends of the small-diameter work rolls 1 and 2 are pivotally supported by work roll chocks 7 and 8, respectively, and the work roll chocks 7 and 8 are constructed so that they can be moved from both sides in the rolling direction of the rolled material. In addition, it is configured so that it can also perform a vertical bending action. A lock member 11 provided on the horizontally moving blocks 9 and 10 is engaged with one end of each of the small diameter work rolls 1 and 2 to form a retaining structure. In the figure, 12 is a rolling stand housing, and 13 and 14 are hydraulic motors for operating the horizontal moving blocks 9 and 10. 15 and 16 are reinforcing roll chocks 17 and 1
With the reinforcement roll supported by 8, the reinforcement roll 15,
The central axis of 16 lies on a vertical axis plane passing through the axes of the intermediate rolls 5 and 6. In the figure, 19 is a reduction cylinder, 20 is a pass line adjusting device 21, 22, 2 used when replacing the small diameter work rolls 1, 2 and the intermediate rolls 5, 6.
3 and 24 are intermediate roll benders. Further, the upper and lower intermediate rolls 5 and 6 have curved concave contours 5a and 6 as shown in FIG.
a and convex contours 5b and 6b connected to this are formed, and the mounting positions of both 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 opposite directions, the inner roll inner chocks 3 and 4 are slidably arranged on the intermediate roll benders 21, 22, 23 and 24. A cylinder (not shown) is attached to the intermediate roll chocks 3 and 4 to adjust the movement. Further, the present invention is directed to the small-diameter work rolls 1 and 2.
Support rollers 25 and 26 for sandwiching the support rollers 25 and 26 are provided at the body long end of the support rollers 25 and 2 respectively.
Reference numeral 6 is supported by hydraulic cylinders 27 provided on support bridges 28 and 29 provided on the rolling stand housing 12, respectively, so that the support rollers 25 and 26 can move horizontally along the rolling direction. . As shown in FIG. 5, the support rollers 25 and 26 are largely bent due to a rolling reaction force when the small-diameter work rolls 1 and 2 have a small diameter, a driving torque reaction force received from the intermediate rolls, and the like. , 26, a horizontal force is applied to the ends of the small-diameter work rolls 1 and 2 to adjust the deflection, and when the small-diameter work rolls 1 and 2 have large diameters, the acting force and Since the deflection due to the reaction force is small, the support rollers 25 and 26 are retracted. According to the configuration of the present invention as described above, the following effects can be obtained. (A) By the interaction between the horizontal movement block of the small diameter work roll and the small diameter work roll body end support roller, the small diameter work roll can be set at the optimum offset position in response to changes in rolling conditions such as reversal of the rolling direction. At the same time, small diameter rolling is possible, and an excellent plate shape control function can be exhibited. In addition, the shape of the central part of the rolling mill is controlled 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 also by the roll bending of the intermediate roll and the small diameter work roll. The correction of the higher-order curve component of the plate crown can reasonably control the end of the rolling mill, and the horizontal deflection of the work roll of small diameter can locally correct the quarter part which cannot be removed by the former two. . (B) In addition to the small-diameter work roll mechanism, by the organic combination with the axial movement adjustment of the intermediate roll having the curved uneven contour and the large crown control by adjusting the bending force,
The plate crown correction effect can be maximized, and in particular, the composite elongation can be corrected. (C) A lateral intermediate roll and a large number of divided supporting rolls as in the prior art are not required, the structure can be simplified and the cost can be greatly reduced, and it is caused by uneven wear of the lateral intermediate roll caused by the divided supporting rolls. There is no transfer of roll mark to rolled material. (D) A support roller for sandwiching the rolled material from both outer edges of the rolled material is provided only on the long end of the work roll, and the support roller is not continuously provided as in the prior art. There is no corresponding space limitation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of each roll arrangement. FIG. 2 is a side view of FIG. FIG. 3 is a side view. FIG. 4 is a cross-sectional view taken along the line AA of FIG. FIG. 5 is a partially cutaway plan view of a main part showing a state of a support roller when a work roll is switched between a small diameter and a large diameter. FIG. 6 is a partially cutaway plan view of a main part showing a state of a support roller when a work roll is switched between a small diameter and a large diameter. [Explanation of reference numerals] 1 work roll 2 work roll 5 intermediate roll 6 intermediate roll 5a concave contour 6a concave contour 5b convex contour 6b convex contour 7 work roll metal chock 8 work roll metal chock 9 horizontal movement block 10 horizontal movement block 11 lock member 12 Rolling stand housing 15 Reinforcing roll 16 Reinforcing roll 25 Support roller 26 Support roller 27 Hydraulic cylinder 28 Support bridge 29 Support bridge

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 (1
In a multi-stage rolling stand having 5) and (16), both of the 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. Intermediate roll chock (3), which is provided in point symmetry and supports both intermediate rolls (5) and (6),
It is arranged so as to be slidable in the axial direction via (4), and the intermediate rolls (5) and (6) are configured to be capable of vertical roll bending, and the pair of upper and lower work rolls (1), The work roll chocks (7) and (8) supporting them are configured so that they can be moved and adjusted in the rolling direction by horizontal movement blocks (9) and (10) that sandwich the work roll chocks (7) and (8) from both sides. (1) and (2) are configured so that they can also perform a bending action in the vertical direction, and the body long ends of the small-diameter work rolls (1) and (2) are
Support rollers (25) and (26) for sandwiching these in the rolling direction from the outer sides of both ends of the rolled material are provided, and the support rollers (25) and (26) can be moved and adjusted in the rolling direction. A rolling stand characterized by being hardened.