JPS61180602A - Rolling stand - Google Patents

Abstract

PURPOSE:To improve shape controllability and to correct the shapes of not only the end and central parts of a sheet but the local part thereof, by performing the control of the horizontal deflection of a work roll jointly with the control of the movements of upper and lower intermediate rolls in the axial directions, in a multi-high rolling mill. CONSTITUTION:Intermediate rolls 15, 16 are interposed between upper and lower backup rolls 31, 32 and upper and lower work rolls 11, 12 respectively. Further, an one-sided roll crown consisting of a taper or an optional curve is formed at an opposite one-end of each of upper and lower intermediate rolls 15, 16; and each movement of them in the axial direction toward that each one-sided crown part of them contact is made controllable. Then, the shape of a rolling material is controlled by performing the control of the horizontal deflections of work rolls 11, 12 jointly with the control of the movements of upper and lower intermediate rolls 15, 16 in their axial directions.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a multi-stage rolling stand with axially adjustable intermediate rolls.

[Conventional technology]

As a general trend, metal flow in the width direction that cannot be ignored occurs at the edges of rolled material plates, and vertical deflection of the roll system due to rolling force and roll flatness between the work roll and the rolled material rapidly decrease at the edge of the plate. The misalignment causes severe thickness reduction (edge drop) at the edges of the plate. As shown in Figure 1,
The upper and lower work rolls (2a) and (2b) are displaced from the axial plane formed by the axes of the upper and lower reinforcing rolls (la) and (lb).
are supported by split support rollers (4a) and (4b) via horizontal intermediate rolls (3a) and (3h), respectively, and the support of the split support roller is supported on the contact surface of the support bridge, and the support of the support A multi-stage rolling stand in which the position of the contact surface for rolling is variable according to the bending cotton that extends symmetrically with respect to the center of the support bridge, and horizontal deflection of the work roll is performed at ja #R of Otsu was developed by Tokuko Showa. It is known as the publication No. 46-6176. In this multi-stage rolling stand, the rate at which the horizontal deflection of the work roll is converted into vertical deflection is about 1710 to 1720, and the local deformation that occurs inside in the width direction of the sheet is small in absolute amount, so the shape is corrected. Although the effect is sufficiently demonstrated, the amount of correction is quantitatively insufficient to correct the sheet edge line shape and improve edge drop, and the amount of correction is insufficient in terms of the amount of correction, and the amount of correction is insufficient in terms of the amount of correction, and the amount of correction is insufficient in terms of the amount of correction of the sheet edge line shape and improvement of edge drop. It is also difficult to control the rolling mill because the support division roller positions are fixed.On the other hand, a 20-high Sendzimir rolling mill as shown in Fig. 2.3.4 has been proposed. This rolling mill has a first intermediate roll (5
A) is provided with a mechanism for controlling the axial center deflection of the work roll (6) by imparting a single taper to the end and moving it in the axial direction, as well as controlling the axial center position of the split support roller (7). This method is disclosed in Japanese Patent Publication No. 29-4761, Japanese Patent Publication No. 4019-1982, Japanese Patent Publication No. 4020-1987, etc. This product has a structure in which arbitrary vertical deflection is given to the work roll (6) by adjusting the position of the divided support rollers via the first and second intermediate rolls (5a) and (5b). ) to correct local deformation, the correction range becomes dispersed along the way, 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 rolls and these are transferred to the rolling mill.

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 the contact of the reinforcing wheel with the work roll on the outside of the board width. There was a limit to the amount of paper that could be erased by rolling. Focusing on this point, a six-roll rolling mill was developed, and
This is disclosed in, for example, Japanese Patent No. -66307. This is 6
This is a rolling mill with a structure in which the intermediate roll of the corrugated rolls is moved in the axial direction, and its features are as follows: (a) Contact between the work roll and reinforcing roll outside the plate width is eliminated on one side of each of the upper and lower sides. , the axial deflection of the work roll can be reduced.

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

This method has been applied to cold rolling mills, and is known to be highly effective 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 could cause damage.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and it solves the problems of the prior art by simple and rational means, and corrects the partial strain of the rolled material by using split support rollers. Horizontal deflection m1 of small diameter work roll! In addition, correction of the sheet edge line shape and improvement of edge drop are achieved by adjusting the axial movement of the intermediate roll with a single crown, resulting in a high degree of shape control that can handle not only simple elongation but also compound elongation. The purpose of the present invention is to provide a rolling mill that can impart the following properties.

Note that the single crown applied to the intermediate roll is extremely gentle, and contact is maintained over the entire length of the single crown, so the pressure changes slowly and there is no risk of roll damage or roll marks. [Means for solving the problem] The rolling stand of the present invention that solves the problems of the prior art has the following features:
It has a pair of upper and lower reinforcing rolls and a pair of upper and lower work rolls, the work rolls are displaced in the horizontal direction from a common axial plane that passes perpendicularly to the axes of the pair of upper and lower reinforcing rolls, and The roll cylinder of the roll is held horizontally by split support rollers through a horizontal intermediate roll,
The support of the split support roller 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 in accordance with the stretch bend line 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. Further, a tapered or arbitrarily curved roll piece crown is formed at opposite ends of the upper and lower intermediate rolls, and the upper and lower intermediate rolls are moved in the axial direction in the direction in which the respective one-piece crown parts are in contact with each other. It is characterized in that it is adjustable and movable, and the shape of the rolling mill is controlled by adjusting the horizontal deflection of the work rolls and adjusting the axial movement of the upper and lower intermediate rolls.

〔Example〕

Details of embodiments of the present invention will be described with reference to FIGS. 5-9. FIG. 5 is an explanatory diagram of the arrangement of each roll of the rolling stand of the present invention, and FIG. 6 is a diagram of the vertical arrangement of the rolls.

Fig. 7 is a partially cutaway front view showing details of the main parts, Fig. 8 is a plan view with the upper reinforcing roll and intermediate roll removed, and Fig. 9 is a plan view with the upper reinforcing roll removed. It is.

In FIGS. 5 and 7, the small-diameter work rolls (111, (12) that correspond to each other vertically are intermediate roll nuts (12),
3), supported vertically by intermediate rolls (15), (16) arranged above and below, which are supported by (14);
The axes of both work rolls (11), (12) are offset from a vertical axis plane passing through the axes of the upper and lower intermediate rolls (Is), (16). Both working rolls' (
11), (12) are small diameter horizontal intermediate rolls (17)
, (18), the support roller divided into many parts (
19) and (20). In addition, the above work roll (11), (12L horizontal intermediate roll (17)
, (18) and the divided support rollers (19), (20) are rotatably supported, and the work roll (11),
(12) is supported by a support head (21), and each divided support roller (19), (20) has an axle box (24) having a keyed sliding shaft (22), (23) at one end; (
25). Each of the above axle boxes (24), (2
5) The outer end surfaces of the sliding shafts (22) and (23) provided in the rolling gate housing nog (26) are used for pushing out the split support rollers built into the support bridges (27) and (28) provided in the rolling gate housing nog (26). The surface of the cylinders (29) and (30) is exposed.

(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 cylinders, which are used when replacing work rolls and intermediate rolls. (38), (39), (40
), (41) is an intermediate roll balance cylinder,
Reinforcement rolls (31), (32) and intermediate roll (15)
.

(16) to enable the required rotational force to be transmitted. In the figure, (42) and (43) are mounting brackets for the split support roller axle box, (44) and (45) are roll balance blocks, and (46) is a pass line used when replacing work rolls and intermediate rolls. adjustment device,
(47) and (48) are claws for supporting work rolls;
(49), (5G), (51).

(52) is an intermediate roll balance block, (53)
is a roll balance block. Furthermore, the present invention forms a roll piece crown consisting of a taper or an arbitrary curve as shown in FIG. 6 at opposing ends of the upper and lower intermediate rolls (15) and (16), and (15) and (16) can be adjusted to move in the axial direction in mutually opposite directions, using intermediate roll balance pro-tsuku (13), (14) * Pro-tsuku for intermediate roll balance (49), (5G) , (51),
(52), slidably disposed in the middle. -Luchok (1
3) and (14) are installed with a cylinder (path shown) to perform the transfer 1i1+FI section.

〔effect〕

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

(a) Partial strain in the rolling mill can be corrected by horizontal deflection adjustment of small diameter work rolls using split support rollers. Therefore, it is possible to cope not only with simple elongation in which the end portions or center portions of the plate elongate and form waves, but also with compound elongation in which portions such as % are locally elongated and form waves, thereby providing a high degree of shape controllability.

(b) Correcting the shape of the plate end and improving edge drop can be done by adjusting the axial movement of the intermediate roll with one crown, but since the deflection that occurs in the work roll is vertical deflection, the amount of correction cannot be changed as it is. Corresponding to the amount of plate crown correction, the plate shape correction function at the plate end is greatly improved.

[Brief explanation of drawings]

FIG. 1 is a roll layout diagram of a conventional multi-high rolling mill. FIG. 2 is a layout diagram of a conventional 20-high rolling mill, FIG. 3 is a sectional view showing the eccentric mechanism of the above, FIG. 4 is a partial sectional view of the roll arrangement of the same, and FIG. 5 is a roll layout of the present invention. FIG. 6 is a vertical roll arrangement diagram of the present invention, FIG. 7 is a partially cutaway front view showing details of the present invention, and FIG. 8 is a plan view of the main parts excluding the upper reinforcing roll and intermediate roll. FIG. 9 is a plan view of the main parts excluding the upper reinforcing roll. (11), (12)・Small diameter work roll, (15)
, (18) intermediate roll, (17), (18)
Horizontal intermediate roll, (19), (20) split support roller, (221, (231-sliding shaft with key) (24), (25) ... axle box, (27), (
28) Support bridge. (29), (30)...Cylinder, (31),
(32)・Reinforcement roll. (35)--Reduction cylinder. Figure 1 Figure S Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Literary procedure? Paperback (spontaneous) March 3, 1985 Patent Application No. 275460 2, Name of the invention Rolling stand 3, Relationship with the person making the amendment case Patent applicant (097) Kawasaki Heavy Industries Co., Ltd. 4, Agent 6, the specification to be amended, 2 drawings 7, the contents of the amendment as shown in the attached sheet -°ゝl Amended the scope of the claims as shown in the attached sheet. 2. In page 2, line 13 of the specification, "it is a general tendency" is amended to "as a general tendency." 3 In the same page, page 4, line 3, amend the phrase ``because it was prepared,'' to ``because it has been prepared.'' 4 "Rolling mill" on page 4, line 16 of the same is corrected to "rolled material." 5 Corrected ``Tokukai Sho J'' on page 5, line 3 of the same document to ``Tokukai Sho J''. 6 Corrected ``Axial movement adjustable and movable'' on page 8, line 8 of the same, to [Axial movement adjustable]. 7 Corrected "rolling mill" on page 8, line 11 of the same to "rolled material." 8 In the same page, page 11, line 4, "arranged" was amended to "arranged." 9 Corrected Figure 2 as shown in the attached sheet. (Addition of code 7.) 10
Figure 4 has been corrected as shown in the attached sheet. (Line leakage) 11 Corrected Figure 8 as shown in the attached sheet. (Line leak) 12 Corrected Figure 9 as shown in the attached sheet. (Line leakage)・γ" 1゛・, 1 jin 2, Claims (&) It has a pair of upper and lower reinforcing rolls and a pair of upper and lower work rolls, and the work rolls horizontally The axial center of the reinforcing roll is displaced from a common axial plane that passes vertically, and the roll cylinder of the work roll is held in the horizontal direction by a split support roller via a horizontal intermediate roll, and the split support roller A rolling stand of the type in which a bearing is supported on a contact surface of a support bridge, and the position of the contact surface for this split support roller support is variable according to a bending line extending symmetrically with respect to the center of the support bridge. (b) An intermediate roll is interposed between the upper and lower reinforcing rolls and the upper and lower work rolls, which interlock with each other and whose axes lie on a common axial plane passing through the axes of the upper and lower reinforcing rolls. (c) forming a roll piece crown consisting of a taper or an arbitrary curve at opposite ends of the upper and lower intermediate rolls, and directing the upper and lower intermediate rolls in a direction in which the respective crown parts approach each other in the axial direction or more; (d) The rolling stand is characterized in that the shape of the rolled material is controlled by a combination of adjusting the horizontal deflection of the work roll and adjusting the axial movement of the upper and lower intermediate rolls. Figure 2 Figure 4 Figure 8 Figure 9

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) At opposite ends of the upper and lower intermediate rolls, Forming a roll piece crown consisting of a taper or an arbitrary curve, and making it possible to adjust the axial movement of the upper and lower intermediate rolls in a direction in which the respective piece crown parts approach each other; (d) adjusting the horizontal deflection of the work roll; A rolling stand characterized in that the shape of the rolling mill is controlled by the combined use of axial movement adjustment of upper and lower intermediate rolls.