JPH02284706A - Rolling mill and method for adjusting zero point position thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rolling mill, and more particularly to a rolling mill in which a small-diameter work roll is supported in a horizontal direction by a horizontal intermediate roll and a horizontal side support roll, and a rolling mill for the same. This invention relates to a zero point position adjustment method.

BACKGROUND OF THE INVENTION Such a rolling mill is disclosed, for example, in Japanese Patent Publication No. 46-6173. -1-The two backup rolls and intermediate rolls are arranged below, - have an axis in a vertical plane, and a work roll is provided offset from this vertical plane to the exit side of a material to be rolled such as a steel plate, This work roll is supported by a submerged intermediate roll and a horizontal site support roll (9).Thus, the vertical plane and the axis of the work roll are offset by an amount of deviation δ in the horizontal direction.

In the above-mentioned prior art, as the diameter of each roll decreases due to wear during rolling, etc., the amount of deviation δ changes significantly. When this amount of deviation δ changes, the horizontal component of the rolling reaction force changes, which changes the axial deflection of the work roll and the amount of displacement at the end of the work roll, making it impossible to perform stable rolling operations. However, it is difficult to automatically exchange work rolls.

Problems to be Solved by the Invention An object of the present invention is to always maintain the horizontal deviation amount δ between the back-up roller and the intermediate (line passing through the axis of the roller and the work roll axis) to a desired value. 1. To provide a rolling mill that can be set accurately.

Another object of the present invention is to provide a method for adjusting the zero point position of a rolling mill, in which the deviation amount δ can be fixed and the zero point position can be easily adjusted.

Means for Solving the Problems The present invention provides: - two back-up rolls arranged under pressure are provided in the housing, the work rolls having an axis offset horizontally with respect to a straight line passing through the axis of the back-up rolls; Pi) - Horizontal intermediate roll on the side and! ) ζ In a rolling mill supported by a flat side support 17-roll, the support member is placed between the horizontal side, the support part t1 that supports the side support roll, and the reaction force receiver provided at a fixed position. This rolling mill is characterized by having a driving means for moving the rolling mill closer to the side and moving it away from the rolling mill in the opposite direction.

The present invention also provides a method for adjusting the zero point position of a rolling mill, which method comprises: (1) providing two backup rolls disposed below in a housing; A work roll having a parallel axis is supported by a horizontal intermediate roll and a horizontal side support roll on one side of the work roll, and a reaction force receiver provided at a fixed position is between the support member supporting the horizontal side support roll and the member. In a method for adjusting the zero point position of a rolling mill using a rolling mill configured with a driving means for moving a support member close to the work roll side and displacing it away from the work roll in the opposite direction, the method includes: rolling down a backup roll; , contact pressurizes the work roll with a predetermined pressure P''c in the vertical direction, and then drives the horizontal side support roll with a force approximately equivalent to the horizontal component force F acting on the work roll due to the pressurizing force P of the work roll. This is a method for adjusting the zero point position of a rolling mill, characterized in that the zero point position is suppressed by means.

According to the present invention, the drive element "q" displaces the support member from the reaction force receiving member close to the work roll side, thereby displacing each roll, such as the work roll, the water T intermediate roll, and the horizontal side support roll. Even when one roll is rolled, the downward deviation δ between the straight line passing through the axis of the backup roll and the axis of the work roll and J)7) can be kept constant.This allows stable rolling. become.

In addition, since the position of the axis of this work roll is fixed, it is easy to remove, insert, and replace the work roll.
This can be easily done automatically using a roll changing device or the like.

In addition, in the present invention, first, the backup roll is rolled down and the work roll is contacted and pressurized vertically at a predetermined pressure I), so that the negative position Vδ can be fixed at a predetermined value.

Further, in the present invention, when this contact pressure is applied, a horizontal component force F acts on the work roll, causing the work roll to curve in the horizontal plane. In order to prevent this, the horizontal side support roll is Press and push back with a force approximately equivalent to the horizontal component force F. This makes it possible to maintain the axis of the work roll in a straight line when the zero point position adjustment is completed, which is what is called mill set-up.

Further, according to the present invention, contact between the horizontal side support roll and the horizontal intermediate roll can be ensured.

Embodiment 1!21 is a simplified cross-sectional view of a part of an embodiment of the present invention. A material to be rolled such as a steel plate is supplied from the right entry side of the 112th roll as shown by the arrow l, and is passed through the work rolls 2a,
2b, and the material to be rolled after rolling is guided from the exit side on the left in FIG. 1 as indicated by the arrow 1a.

In the following description, the subscripts a and b of the reference signs may be omitted to indicate the entirety. The above-mentioned reference numerals 1 and 1a may also indicate the so-called pass line through which the material to be rolled passes. The work rolls 2a, 2b are supported by intermediate rolls 3a, 3b and backup rolls 4a, 4b arranged above and below, respectively.

The respective axes of these intermediate rolls 3a, 3b and backup rolls 4a, 4b are within the vertical plane 5, and a straight line passing through the axes of the backup rolls 4a, 4b is within the vertical plane 5, and the work rolls 2a, The axis of 2b is horizontally shifted from the vertical plane 5 by an amount of deviation δ toward the exit side. The work rolls 2a and 2b are horizontal intermediate rolls 6a.
, 6b and horizontal side support rolls 7a, 7b.

FIG. 2 is a simplified cross-sectional view of section 1 viewed along the section lines ■1 to ■6, and FIG. 3 shows a part of the work roll 2a, the horizontal intermediate roll 6a, and the horizontal side support roll 7a. FIG. Referring to these drawings, a shaft 8 at the axial end of the work roll 2a is supported by a bushing 9 that is mutually rotatable with the shaft 8, and the bushing 9 is rotatable with respect to the shaft 8.
is supported in contact with the support piece 11 and can be changed by the cylinder 1o. The shaft 12 of the horizontal intermediate roll 6ε is supported by a chock 13. The engagement groove 14 of this chock 13 is movable in the axial direction of the arm 15 along a single-line projection 16 formed on the arm 15.
ing. The plurality of horizontal side support rolls 7a are individually rotatable and provided on a common rotating shaft 17, and the shaft end IS of the rotating shaft 17 is inserted into the arm 15, and the arm 15 is connected to the axis of the horizontal side support roll 7xt. Angular displacement around the same axis is possible. A block is provided at this shaft end 18, and this block is held in a cartridge 20. The cartridge 2o is provided to be detachable from the housing 21. The housing 21 is arranged in fixed positions on both sides of the rolling mill. The bushing 9 is also supported on the housing 21 by support means 4o.

A plurality of moving bodies 22 are provided on the rotation shaft 17 of the horizontal side support roll 7a. The moving body 22 includes a rotating shaft 1
7 is inserted rotatably. These moving bodies 2'', 2 are held in a cartridge 2o, and the moving direction 1.1a of the material to be rolled is
It can be displaced to

Each of the movable bodies 22 abuts on a support member 24 common to these movable bodies 22 via individual wedges 23 for adjusting vLx. The fine inch A trimming wedge 23 can be raised and lowered by a displacement means such as an external hydraulic cylinder or an electric motor, whereby the plurality of movable bodies 22 are arbitrarily displaced, and the desired gap shape between the upper and lower work rolls, i.e., the plate You can get a crown.

No. 412I is a sectional view taken from section line 1'V-4 in FIG. 2. The supporting member 24 is provided with the moving direction 1 of the material to be rolled,
A guide groove 25 is formed along 1a. This guide groove 25 has a guide protrusion 26 protruding from the inner side of the housing 21.
This allows the support member 24 to be smoothly displaced without twisting during movement. The gap a allows thermal expansion during rolling. Upper and lower support members 24
Wedge surfaces 27a and 27b are formed on a and 24b. These wedge surfaces 27a and 27b are inclined so that the reaction force receiver becomes wider as it goes up and down with respect to the member 28. A wedge 29 is arranged between the wedge surface 27 and the reaction force receiver member 28. These @2 are tapered as f1' approaches the normal position of the material to be rolled, and the wedge surface 27 and the reaction force receiver come into sliding contact with the member 28.

The pattern 29 is moved up and down by the displacement means 30.

This displacement means 30 is 1%! Support rod 3 fixed in two
1 and a worm boiler 32 fixed to this support rod 31
A hydraulic cylinder or the like may be used as the displacement means 30, which includes a worm 33 that engages with the worm wheel 32, and a motor 34 that drives the worm 33.・Configure a driving means for driving 4. The reaction force receiver member 28 is fixed to the housing 21.

When the support member 24 is not rolling, the reaction force receiver is connected to the member 28 by the cylinder 35 in the moving direction 1, 1 of the material to be rolled.
can be displaced in the same and opposite directions as a.

The reaction force receiver of the wedge 29 is supported by the member 28 so as to be movable in a direction perpendicular to the moving direction of the rolled material. The angle θ between the wedge surface 27 and the pattern 29 is 1! The sliding angle is determined to be less than the rubbing angle, thereby causing the support member 24 to be directed in the moving direction of the rolled material. When a large force toward la (left side in Figure 1) is applied, the wedge 29 is displaced in the direction perpendicular to the direction of movement 1.1=t (direction above and below the first [K) and escapes. This will be prevented.

During the rolling operation of the material to be rolled, the wedge 29 is brought to the position shown as No. 10, and the reaction force acting on the work roll 2 is transferred to the horizontal intermediate roll 6 and the underwater support roll 7.
a, moving body 22, v11 adjustment PA23. Support member 24
The reaction force receiver is received (pulled) by the member 28 via the groove 29. When the outer diameter of the work roll 2, the horizontal intermediate roll 6, and the horizontal side support roll 7 becomes smaller due to wear due to rolling, the grooves 29a and 29tl are displaced. The means 30a and 30b respectively displace the material to be rolled toward the moving position (that is, in the downward and downward directions in FIG. 1). Thereby, the four positions δ between the vertical plane 5 and the work roll 2 can be maintained at a predetermined constant value. Therefore, stable rolling can be maintained. 'i work roll 2f) (5 positions are fixed, so housing 2
The removal and insertion of the work roll 2 from the work roll 1 can be easily carried out by means of a roll changing device. When replacing the work roll 2, the displacement means 30 moves the wedge 29 in the direction away from the passing position of the rolled material, that is, j'A 29
Displace a upwardly, and displace Gatsuko 29 L+ downwardly.

In this gap, the support member 242 is displaced by the cylinder 35 in the moving direction 1a of the rolled material toward the exit side. In this way, the work roll 2 can be removed and inserted.

The V&adjustment lateral 23 is used to finely adjust the position of the movable body 22 during rolling, thereby making it possible to give the work rolls 2 a desired roll gap shape.

Although the pA 29 and the displacement means 30 for displacing the wedge 29 were used in the embodiment described above to drive the support member 24 in displacement, other configurations may be used in other embodiments of the invention. Good too.

No. 511N is a sectional view of another embodiment of the present invention, and No. 6
The figures are a simplified cross-sectional view of a portion of the embodiment shown in FIG. 5, and FIG. 7 is a simplified horizontal cross-sectional view of the embodiment shown in FIGS. 5 and 6. The 5111th is the 7th
This is a sectional view taken from the section line ViV6 in the figure, and FIG. 6 is a sectional view taken from the section line 1-V[4 in FIG. 7. The basic structure of this embodiment is similar to the embodiment shown in FIGS. 1 to 11 above, and corresponding parts are designated by the same reference numerals.

The backup roll 4b is displaced and driven by a double-acting hydraulic cylinder 62 for pass line adjustment that drives the wedge 61. The other backup roll 1a is rolled down by a double-acting hydraulic cylinder 63.

The arm 15 that supports the roll chock 13 of the horizontal intermediate roll 6a is provided in one block, and this block]9
A press rod 65 is provided between the support member 24 and the support member 24 . A pair of cylinders 35it is provided between the support member 24 and the housing 21.

Fine adjustment for zero point position; I! The offset positions of the one-toku flat side support rolls 7 by the trimming wedges 23 are set to be approximately equal. Therefore, the pass line 1 is moved and driven by the cylinder 62 to move the 4161 to the right in FIG. 1
Raise it to reach . At this time, the amount of deviation δ is maintained by the support member 40.

Next, the backup roll 4a is moved by the cylinder 63').
, the intermediate roll 3εt and the work roll 2a are lowered and pressed down, and the two work rolls 2a and 2b are contacted and pressed at a predetermined pressure P. This pressure P is, for example, 200
ton. This eliminates the gap between the rolls 2, 3.4. The vertical position of the hydraulic cylinder 63, and hence the backup roll 4a, is detected by the position detection means 66, and the control means 67 controls the servo valve 68 to operate so that the position of the backup roll 4a is maintained. A reduction screw may be used in place of the hydraulic cylinder 63, and the vertical positions of the structure related to the hydraulic cylinder 63 and the structure related to the wedge 61 may be reversed, and other modifications are also possible. .

The state shown in FIG. 7 described above shows the state before compression by the cylinder 63.

No. 811N indicates a hydraulic cylinder 69a for driving the fine adjustment wedge 23a corresponding to each of the horizontal side support rolls 75t. These hydraulic cylinders 69a include:
Pressure oil is commonly supplied from the electromagnetic switching valve 70 via a pressure reducing valve 71 that can set a secondary pressure.

The state in which the rolls 23.4 are pressed into contact is shown in FIG. At this time, the work roll 2a is not supported by the horizontal intermediate roll 6a, and therefore the axis 72 is curved toward the exit side in the horizontal direction. This state is shown in a simplified manner in FIG. In FIG. 10, the pressure P exerted by the cylinder 63 is applied to the work roll 2a in the horizontal direction.
It can be seen that it is possible to make the axis 7a of the work roll 2a substantially straight by pushing back the component force F acting on the work roll 2a by the horizontal intermediate roll 6a and the horizontal side support roll 7a.

Then, the support member 24a is pushed by the hydraulic cylinder 35a one inch closer to the entrance side. At this time, as shown in FIG. 7, a pressure reducing valve 7 can set a secondary pressure from the hydraulic pressure 11173 to the electromagnetic switching valve 74 in the hydraulic cylinder 35a.
Pressure oil is supplied from 5. Since two hydraulic cylinders 35a are provided, the horizontal component force shared by each hydraulic cylinder 35a is 1/2F.

Here, F is F <
P t a nθ1 − (1)
This horizontal component force F is shared by a plurality of horizontal side support rolls 7a (7) in this embodiment. At this time, a gap is created between the support member 24a and the wedge 29a.

In order to eliminate this gap, the driving means 30a is driven to lower the wedge 29a.

Similar operations are performed regarding the other cylinder 35b and drive means 30b.

This drive means 30a has a hydraulic motor 75a, and is provided with a hydraulic pressure gauge 76a for detecting the hydraulic pressure supplied to the hydraulic motor 75=t. This oil pressure gauge 76a is connected to the driving means 3.
It functions to detect the load of 0a.

When the hydraulic pressure detected by the hydraulic pressure gauge 76a increases slightly while descending the wedge 29a, that is, when the wedge 29a and the support member 24a come into contact and the gap becomes zero, the driving means 30a is stopped. .

In this way, the gaps between the rolls 2, 3.4 and 6.7 can be almost eliminated, and it is almost possible to eliminate the bending of the horizontal axis of the work roll 2a.

Therefore, the hydraulic cylinder 35a is operated to support the support member 24a.
Pressure is applied to the left side of FIG. 5, that is, to the wedge 29a side.

This prevents the horizontal intermediate rolls 6, :t and the horizontal side support rolls 7a from being displaced when adjusting the interval between the work rolls 2a, 2b in order to set the thickness of the rolled material after zero point adjustment. Furthermore, as will be described below, it becomes possible to accurately apply equal pressure F/7 to each of the horizontal side support rolls 7a.

This state is shown in FIG. There is a slight error in the dimensional accuracy of each horizontal side support roll 7a, and there are variations in the pressures F1 to F7 shared by each horizontal side support roll 7a. When the pressure of each horizontal side support roll 7a is small, the horizontal side sabot roll 7Ft and the horizontal intermediate roll 62
1 may slip and cause scratches on the surface, and the scratches may be transferred to the material to be rolled via the work rolls 2a. Therefore, the pressure F1~ shared by each horizontal side support roll 7a
It is necessary to accurately set F7 to F,7.

Then, in order to drive the fine adjustment pJ 23a, the same pressure F/'7 is applied to the horizontal side servo) and roll 7a through a pressure reducing valve 71 to the hydraulic cylinder 69a shown in FIG. The pressure applied to the sea urchin is set, resulting in the state shown in FIG. 12. Here, F1-=F2=F3=F4=F
5-=F6=F7-=F,'7...ku2> In this way, the adjustment of the zero point position is completed. Thereafter, the distance between the work rolls 2a and 2b is set according to the thickness of the rolled plate.9 As another embodiment of the present invention, the horizontal side the boat roll 7a may be constituted by one roll.

In the embodiment described above, mainly the work roll 1 related to the work roll 2a is
Although the operations have been explained in ~, the operations related to work roll 21) and the operations related to work role 2 cl
It is done in the same way at the same time.

Effects of the Invention As described above, according to the present invention, a driving means is provided between the support member supporting the horizontal side support roll and the reaction force receiver to set the position of the horizontal side support roll, thereby The horizontal deviation Iδ between the straight line passing through the 1-2°-) axis and the axis of the work roll can be maintained at a constant value regardless of the thickness of each roll. . This allows stable rolling and changes the shape of the gap between the work rolls.
It becomes possible to make a flat board without causing heat. Furthermore, since the axis f) position of the work roll is fixed, the work roll can be easily replaced and automation is possible.

Further, according to the present invention, the offset position δ can be fixed before contact pressure is applied to the roll in the vertical direction. Furthermore, by pushing back the bending of the horizontal axis acting on the work roll during contact pressure by using the driving means, the linearity of the work roll during mill set-up can be maintained. Furthermore, contact between the horizontal side sabot l~roll and the horizontal intermediate roll can be ensured.

The invention can also be implemented in conjunction with a rolling mill that biases multiple horizontal intermediate rolls.

[Brief explanation of drawings]

1st Uj! I is a simplified cross-sectional view of a part of an embodiment of the present invention, and FIG.
A simplified cross-sectional view as seen from , the third [ ] is work roll 2
a, a perspective view of a part of the horizontal intermediate roll 6a and the horizontal side support roll 7a, FIG. 4 is taken along the cutting plane line ■- of FIG.
5 is a sectional view of another embodiment of the invention, FIG. 6 is a simplified sectional view of a part of the embodiment shown in FIG. 5, and FIG. A simplified horizontal cross-sectional view of the embodiment shown in FIG.
FIG. 9 is a diagram showing the configuration related to roll 2.23a.
3.4 is a simplified cross-sectional view showing the state during contact pressurization, and FIG. 10 shows the pressure P applied to the rolls 2.3. ．． Figure 11 is a simplified horizontal diagram showing the state when there is variation in the forces F1 to F7 shared by the horizontal side support rolls 7a. The cross-sectional view, Figure 12, shows the horizontal side sabot I.
FIG. 7 is a simplified horizontal sectional view showing a state after the zero point position adjustment is completed, showing a state when the forces F1 to F7 applied fY to the roll 7t are equal. 2a', 2b = work roll, 3 = t, 3b = intermediate roll, 4a, 4b - Backup roll, 51;) facing, 6 a,, 6 b - horizontal intermediate roll, 7,:
l, 7b...Horizontal side support roll, 22r
i, 221-+・mobile body, 23 a, 23
b-, wedge for jilJu, 242t24 b-・support member, 29a, 291+-1i, 30[t301]
... Displacement means agent Patent attorney Kei Saikyo Figure ``lbD'' Figure 23a 23a 6''1 23a 23a Figure 10

Claims (2)

[Claims] (1) Two backup rolls arranged one above the other are provided in the housing, and a work roll having an axis that is shifted in the horizontal direction with respect to a straight line passing through the axis of the backup roll is placed on one side of the work roll as a horizontal intermediate roll and a horizontal In a rolling mill supported by side support rolls, the support member is placed close to the work roll side and in the opposite direction between the support member that supports the horizontal side support rolls and the reaction force receiving member provided at a fixed position. A rolling mill characterized in that it is provided with a driving means for causing separation displacement. (2) A method for adjusting the zero point position of a rolling mill, in which two backup rolls arranged one above the other are provided in a housing, and a workpiece having an axis shifted in the horizontal direction with respect to a straight line passing through the axis of the backup rolls is used. The roll is supported by a horizontal intermediate roll and a horizontal side support roll on one side of the work roll, and a support member is provided between the support member that supports the horizontal side support roll and the reaction force receiving member provided at a fixed position. In such a method for adjusting the zero point position of a rolling mill, which uses a rolling mill configured with a driving means that is brought close to the work roll side and displaced away from the work roll in the opposite direction, the backup roll is rolled down and the work roll is moved away from the work roll. Contact pressure is applied in the vertical direction with a predetermined pressure P, and then the horizontal side support roll is driven by the drive means with a force approximately equivalent to the horizontal component force F acting on the work roll due to the pressure P of the work roll. A method for adjusting the zero point position of a rolling mill, characterized by rolling and pressing.