JPS61186112A - Rolling stand - Google Patents

Abstract

PURPOSE:To control a shape of a rolled material by constituting a stand performing a combination of the horizontal deflection control of small diameter working rollers by divided supporting rollers, the axial direction movement control of a medium roller with a single crown, and the vertical bending force control of the working and medium rollers. CONSTITUTION:In the stand constitution, the small diameter working rollers 11 and 12 are supported by the medium rollers 15 and 16 almost vertically to be subjected to a vertically bending control; the axis line of the two working rollers 11 and 12 is deviated from the vertical plane containing the axis of the medium rollers 15 and 16; the two working rollers 11 and 12 are supported in the deviated direction by supporting rollers 19 and 20 divided into many small parts through small horizontal medium rollers 17 and 18; cylinders 19 and 30 push the supporting rollers 19 and 20 out to control horizontal deflection of the working rollers 11 and 12; a taper or a single crown is formed on an end of the medium rollers 15 and 15 which is opposite to each other; medium roller chocks 13 and 14 are provided with a cylinder to control each other's opposite movement of the medium rollers 15 and 16 in the axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention provides for arranging work rolls and/or intermediate rolls to provide vertical bending and for axially adjustable intermediate rolls. This invention relates to a multi-stage rolling stand.

[Conventional technology]

- Although this is an S-like tendency, a non-negligible metal flow in the width direction occurs at the edge of the rolled material plate, and vertical deflection of the roll system due to rolling force and roll flatness between the work roll and the rolled material occur at the edge of the plate. Due to the sudden decrease in , an extreme thickness reduction occurs at the edge of the plate (edge 1: rosso). As shown in FIG. 6, the upper and lower work rolls (2a) are displaced from the axial plane formed by the axes of the upper and lower reinforcing rolls (la) and (Ib),
(2bl, respectively horizontal intermediate roll (3a), (3b
) via the split support roller (4a).

(4b), the bearing of this split support roller is supported on the contact surface of the support bridge, the position of the contact surface for the support depending on a bending line extending symmetrically with respect to the center of the support bridge. The multi-stage rolling stand, which is variable and uses this mechanism to horizontally deflect the work rolls, was developed by the Tokuko Showa 4G.
This is known as Publication No.-6176. In this multi-stage rolling stand, the rate at which the horizontal deflection of the work rolls is converted into vertical deflection is about 1710 to 1720, and the absolute amount of local deformation that occurs inside in the width direction is small, so the shape Although the correction effect is sufficient, the amount of correction is insufficient in quantity to correct the shape of the plate edge and improve edge drop, and the amount of correction is insufficient in quantity to correct the plate edge shape and improve the edge drop. It is also difficult to control the support division rollers because the positions of the support division rollers are fixed.

On the other hand, a 20-high Sendzimir rolling mill as shown in Figures 7.8 and 9 has been proposed. This rolling mill has a first intermediate roll (5
a) A mechanism is provided to control the axial deflection of the work roll (6) by imparting a single taper to the end and moving it in the axial direction, as well as to control the axial position of the split support roller (7). This method is disclosed in Japanese Patent Publication No. 29-4761, Japanese Patent Publication No. 4019-1987, Japanese Patent Publication No. 4020-1974, and the like. This can be adjusted to any perpendicular direction to the work roll (6) by adjusting the split support roller position FI via the first and second intermediate four wheels (5a) and (5b).
Because of the structure that imparts a stiffness, even if an attempt is made to correct local deformation using the divided support rollers (7), the correction range will spread out midway through, making the local correction function less effective. To improve this, various structures with one intermediate roll have been proposed, but since the rolling reaction force is supported in the vertical direction, the pressure between the split support roller edge and the intermediate roll increases extremely. This has the disadvantage that roll marks are formed on the work roll and are transferred to the rolled material.

On the other hand, when rolling with conventional 4-high rolls, the plate crown,
One of the problems in flatness control is the vertical deflection of the work roll axis caused by contact between the work roll and the reinforcing roll outside the board width, and there is a limit to eliminating this by vertical bending of the work roll. there were. Focusing on this point, a six-roll rolling mill was developed and disclosed in Japanese Patent Laid-Open No. 56-66307 and other publications. This is a rolling mill with a structure in which the intermediate roll of six rolls is moved in the axial direction, and its characteristics are as follows: , the axial deflection of the work roll can be reduced.

(b) The effect of the roll force applied at the work roll chock section is increased.

Therefore, it has been applied to actual cold rolling mills, and it is known that it has a great effect in controlling plate crown and plate flatness, and has been applied to many cold rolling mills.

However, as the width of the work roll changes, the end of the intermediate roll moves axially to the end of the work roll, or as a result of increasing the vertical bending effect of the intermediate roll, the contact pressure between the work roll and the intermediate roll increases to the shoulder of the intermediate roll. This can lead to significant damage to the rolls.

In addition, in order to exert a bending effect on the center of the rolled material in the width direction, it is necessary to insert the intermediate roll shoulder inward from the edge of the sheet, but due to the high pressure at this shoulder, the roll Marking may occur, and this limitation limits the ability to locally modify the shape within the plate.

Furthermore, when reducing the diameter of the work roll, horizontal deflection occurs due to the structure in which both ends are supported by chocks, and the deflected portion is no longer supported directly under the intermediate roll, resulting in uneven thickness in the width direction, making it difficult to change the plate shape. There was a limit to the application of this mill because it caused significant damage.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and solves the problems of the prior art by simple and rational means. To provide a rolling stand that controls the shape of a rolled material by combining the adjustment of the amount of deflection, the adjustment of the axial movement of the intermediate roll, and the adjustment of the vertical bending force of the work roll and/or the intermediate roll (IF). It is.

[Means for solving problems]

The rolling stand of the present invention solves the problems of the prior art,
A pair of upper and lower reinforcing rolls and a pair of upper and lower work rolls, the work rolls being horizontally displaced from a common axial plane passing perpendicularly to the axes of the pair of upper and lower reinforcing rolls; The roll cylinder is held horizontally by split support rollers through horizontal intermediate rolls,
The split support roller support is supported on the contact surface of the support bridge, and the position of the contact surface for the split support roller support is variable according to a bending line extending symmetrically with respect to the center of the support bridge. In a certain type of rolling stand, intermediate rolls are provided between the upper and lower reinforcing rolls and the upper and lower work rolls, which are interlocked with each other and whose axes lie on a common axial plane passing through the axes of the upper and lower reinforcing rolls. The work roll and/or the upper and lower intermediate rolls are interposed and arranged to give vertical bending, and the upper and lower intermediate rolls are arranged so as to be adjustable in axial movement in opposite directions, and the work roll is Adjustment of horizontal deflection amount,
The present invention is characterized by a configuration in which the shape of the rolled material can be controlled by combining adjustment of the axial movement of the intermediate roll and adjustment of the vertical bending force of the work roll and/or the intermediate roll.

〔Example〕

The details of the embodiment of the present invention will be explained with reference to FIGS. 1-5. FIG. 1 is an explanatory diagram of the arrangement of each roll of the rolling stand of the present invention, and FIG. 2 is a diagram of the vertical arrangement of the rolls.

Fig. 3 is a partially cut-away front view showing details of the main parts, Fig. 4 is a plan view with the upper reinforcing roll and intermediate roll removed, and Fig. 5 is a plan view with the upper reinforcing roll removed. It is a diagram.

In Figures 1 and 3, the small-diameter work rolls (11) and (12), which correspond to each other vertically, are arranged so that the intermediate roll chocks (13) and (+4
Intermediate rolls (15) arranged above and below supported by 1
, (16), and both work rolls (
The axes of 11) and (12) are the upper and lower intermediate rolls (15),
(16) is offset from the vertical axis plane passing through the axis of (16). In the direction of this deviation both work rolls (11), (12)
Support rollers (19), (20) divided into many parts are passed through small-diameter horizontal intermediate rolls (17), (18).
It is supported by

In addition, the above-mentioned work rolls (11), (12), horizontal intermediate rolls (17), (18), and divided support rollers (
19) and (20) are rotatably supported, and work rolls (11) and (12) are supported by a support head (21), and each divided support roller (191, (20)
are supported by axle boxes (24) and (25) having keyed sliding shafts (22) and (23) at one end. Each of the above-mentioned shaft boxes (24), (each of the rocking shafts (22) provided in 251,
(23), the outer end surface of the rolling stand housing (23)
The support bridge (27) provided in 6), the cylinder (29) for extruding the split support roller built into (28),
(30) is highlighted.

(31), (32) are reinforcing roll chocks (33),
(34) is a reinforcing roll supported by the reinforcing roll (34).
The central axes of 1) and (32) are the intermediate rolls (15),
(16) lies on the vertical axis plane passing through the axis. In addition, in the figure (
35) is a reduction screw, and (36) and (37) are reinforcing roll balance sills, which are used when replacing work rolls and intermediate rolls. (38), (39), (40),
(41) is an intermediate roll balance cylinder, which includes reinforcing rolls (31), (32) and an intermediate roll (15).

(16) to enable the required rotational force to be transmitted. In addition, (42) and (43) in the figure are mounting brackets for the split support roller axle box, (44) and (45) are roll balance blocks, and (4B) is a pass line used when replacing work rolls and intermediate rolls. Adjustment device 1.
(47) and (48) are claws for supporting work rolls, (
49), (501, (51).

(52) is a block for intermediate roll balance, (53
) is a roll balance block. Further, in one embodiment of the present invention, upper and lower intermediate rolls (15), (If
As shown in FIG. 2, a roll piece crown consisting of a taper or an arbitrary curve is formed on opposite ends of the intermediate rolls (15), (16L!), and the axes of the intermediate rolls (15), (16L!) are oriented in opposite directions. In order to make the direction movement rJ!JJ adjustable, the intermediate roll chocks (13), (14) are replaced with the intermediate roll balance blocks (49), (50), (5
1), (52) so as to be slidable, and the intermediate roll cho 1
．． The movement is adjusted by attaching cylinders (not shown) to (13) and (14).

〔effect〕

Since the present invention is configured as described above, the following effects can be obtained.

(,) Correction of partial strain in the rolled material is achieved by adjusting the horizontal deflection of the small-diameter work roll using split support rollers, adjusting the axial movement of the intermediate roll, and adjusting the vertical bending force of the work roll and/or the intermediate roll. The shape of the rolled material can be controlled by combining the two methods. Therefore, it is possible to cope not only with simple elongation in which the end portions or the central portion of the plate elongate and create waves, but also with compound elongation in which the edges or the like partially elongate and create waves, thereby providing a high degree of shape controllability.

(b) Modification of plate edge shape and improvement of edge drop (
This can be done by adjusting the axial direction shift tAJ of the intermediate roll with one crown, but since the deflection that occurs in the work roll is a vertical deflection, the amount of correction corresponds to the amount of correction of the plate crown, and the amount of correction at the edge of the plate is Significant improvements have been made to the plate shape correction function.

[Brief explanation of the drawing]

Fig. 1 is a roll arrangement diagram of the present invention, Fig. 2 is a vertical roll arrangement diagram of the invention, Fig. 3 is a partially cutaway front view showing details of the invention, and Fig. 4 is an upper reinforcing roll, an intermediate FIG. 5 is a plan view of the main part excluding the roll, and FIG. 5 is a plan view of the main part excluding the upper reinforcing roll. Figure 6 is a roll layout diagram of a conventional multi-high rolling mill, Figure 7 is a layout diagram of a conventional 20-high rolling mill, Figure 8 is a sectional view showing the eccentric mechanism of the above, and Figure 9 is an example of the roll arrangement of the same. FIG. (u), (12)...Small diameter work roll, (151
, (16)... intermediate roll, (17), (18)...
・Horizontal intermediate roll, (19), (20)...Divided support roller, (22), (23)...Sliding shaft with key. (24), (25)...Axle box, (27), (28)
...Support bridge, (29), (30)--Cylinder, (3]), (32)...Reinforcement roll, (35)
- Reduction cylinder. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6! 10,000'b Figure 7

Claims (1)

[Scope of Claims] (a) It has a pair of upper and lower reinforcing rolls and a pair of upper and lower work rolls, and the work rolls are arranged horizontally from a common axial plane that passes perpendicularly to the axes of the above-mentioned pair of upper and lower reinforcing rolls. The roll cylinder of the work roll is displaced and held horizontally via a horizontal intermediate roll by a split support roller, the support of which is supported on the contact surface of the support bridge, and this In a rolling stand of the type in which the position of the contact surface for the split support roller support is variable according to a bending line extending symmetrically with respect to the center of the support bridge, (b) the above-mentioned upper and lower reinforcing rolls and upper and lower work rolls; (c) Intermediate rolls interlocked with each other and whose axes lie on a common axial plane passing through the axes of the upper and lower reinforcing rolls; (c) the work rolls and/or the upper and lower reinforcing rolls; (d) Adjustment of the amount of horizontal deflection of the work roll, and adjustment of the horizontal deflection of the work roll, and A rolling stand characterized in that it is configured to control the shape of a rolled material by combining axial movement adjustment and vertical bending force adjustment of a work roll and/or an intermediate roll.