JPH04178206A - rolling mill - Google Patents

Abstract

PURPOSE:To amplify the force of the device and to miniaturize and simplify the device by providing the roll bending device for moving the shaft box along the inclined surface of the inclined guide surface. CONSTITUTION:On the case that the roll bending force PB is applied to the direction parallel with the wall surfaces 5a, 5b of the inclined guide component 5 with the roll bending device 9 on the rolling mill, the bending force PB can be decomposed into the force Py which passes through the center O1 of the intermediate roll 2 and is toward the center O2 of the upper back up roll 3, and the force Px which passes through the center O1 of the intermediate roll 2 and faces toward the orthogonal direction to the side surface 4a of the shaft box 4 and the wall surface 5a of the inclined guide component 5. If the ingredient of vertical direction of Py is made as F, F=cosalpha/cos (theta+alpha).PB is composed, and cosalpha/cos (theta+alpha)>1, so F>PB, and if the roll bending force PB is multiplied, the composition F of vertical direction is amplified.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a rolling mill.

[Prior Art] Conventionally, a method of bending a roll for shape control is widely known. An example of a five-high rolling mill in which roll bending is applied to intermediate rolls is disclosed in Japanese Patent Publication No. 60-48242.

The rolling mill shown in the above publication will be explained with reference to FIG. 8. In the figure, a indicates an upper work roll, b indicates an intermediate roll, and C indicates an upper back-up roll. It is possible to give a roll pending force P8 of .

[Problems to be Solved by the Invention] In the above rolling mill, the roll pending force PR is limited by the roll bending device, and it is not possible to generate a force greater than the force that can be directly produced by the roll bending device, resulting in a large roll pending force. When force is required, there is a problem in that two roll axle boxes must be provided on each side of the roll, and a roll bending device must be installed in each roll axle box.

In view of the above-mentioned circumstances, the present invention makes it possible to apply a force greater than the force that can be directly generated by a roll bending device to a work roll or an intermediate roll as a vertical roll pending force, thereby reducing the size of the roll bending device. This was done for the purpose of simplifying the process.

[Means for Solving the Problem] The invention of claim 1 provides a rolling line for an axle box that rotatably supports a work roll, or an axle box that rotatably supports an intermediate roll interposed between a work roll and a backup roll. An inclined surface inclined substantially parallel to the front and rear of the rolling line direction is provided, and inclined guide members inclined substantially parallel are provided on both sides of the rear side of the rolling line direction surface, and the inclined surface of the axle box faces the inclined surface of the inclined guide member. The axle box is slidably fitted to the inclined guide member so as to move the axle box along the inclined surface of the inclined guide member. An inclined surface inclined toward the rolling line is formed on the lower surface of the axle box that rotatably supports the axle box or the axle box that rotatably supports the intermediate roll interposed between the work roll and the backup roll. A roll bending device in which an inclined surface formed on the lower surface of the axle box is supported by a wedge member having an inclined surface parallel to the inclined surface of the axle box on the upper surface, and the axle box is moved along the inclined surface of the wedge member; A roll bending device for moving a member in a direction parallel to the rolling line direction is provided, and the invention according to claim 3 includes an axle box that rotatably supports a work roll;
Alternatively, the front and rear sides in the rolling line direction of an axle box that supports the intermediate roll interposed between the work roll and the backup roll so that it can rotate freely - for example, in the rolling line direction so that the lower side is close to the center side of the work roll or intermediate roll. A roll bending device is provided which forms a facing inclined surface and pushes the axle box in a direction perpendicular to the inclined surface of the 11h box, and the side on which the roll bending device is provided is provided with the center of the work roll or intermediate roll as a reference. Short-body support rolls that support work rolls or intermediate rolls on the opposite side are provided at both ends of the body of the roll provided with the roll bending device.

[Function] In the invention of claim 1, the axle box is pushed diagonally toward the backup roll by the roll bending device, and in the invention of claim 2, the axle box is pushed diagonally toward the backup roll by the roll bending device, and in the invention of claim 2, the shaft box is pushed by the wedge action produced by the cooperation of the roll bending device and the wedge member. The box is pushed toward the backup roll, and in the invention of claim 3, the axle box is pushed diagonally toward the backup roll by the roll bending device, but in any case, the force generated perpendicularly to the force generated by the roll bending device is The component force in the direction increases, and the force of the roll bending device is amplified.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 and 2 show a first embodiment of a rolling mill according to the present invention, which is an embodiment related to claim 1. FIG.

In FIGS. 1 and 2, l is an upper work roll, 2 is an intermediate roll, and 3 is an upper back-up roll, and the intermediate roll 2 is offset by an amount me in the rolling line direction D with respect to the upper back-up roll 3. has been done. In addition, the front and rear side surfaces 4a and 4b of the shaft box 4, which rotatably supports the intermediate roll 2, in the rolling line direction are not vertical but inclined surfaces, and the side surfaces 4a and 4b are in contact with each other so as to be able to slide vertically. Wall surfaces 5a, 5 of the inclined guide member 5 on the housing window side
b is also formed as an inclined surface having the same angle as the side surfaces 4a and 4b. Further, the direction of the roll pending force P8 directly acting on the intermediate roll 2 is determined by the wall surface 5a of the inclined guide member 5,
9 is disposed on the roll bending device in a direction parallel to 5b.

When a roll pending force PB is applied in a direction parallel to the wall surfaces 5a and 5b of the inclined guide member 5 by the roll bending device 9 in the rolling mill, the roll pending force PB
is the force PY passing through the center 01 of the intermediate roll 2 and directed toward the center 0° of the upper back-up roll 3, and the center 0 of the intermediate roll 2.
1, the side surface 4a of the axle box 4, and the wall surface 5 of the inclined guide member 5.
It can be decomposed into a force Px directed perpendicular to a, yielding . Also, if the vertical component of PY is F, then F-=Pvcosα...(ii
), therefore, (i) Q) holds true.

When F>Pa and the roll pending force PFI is applied, the vertical component F is amplified.

In Equation (+)(i) 6, θ is the angle that the direction of the roll pending force PB makes with the perpendicular line, and α is the angle that the direction of PY makes with the perpendicular line.

Further, the inclined guide member 5 is retracted in the rolling line direction when the roll is taken in and out of the housing, and is moved forward and positioned in the horizontal direction during rolling.

FIG. 3 shows a second embodiment of the rolling mill of the present invention, which is an embodiment related to claim 2. In the figure, 6 is a wedge member having an inclined surface 6a on the upper surface that is inclined with respect to the rolling line direction, and is movable in a direction parallel to the rolling line direction, and 7 is a wedge member 6 parallel to the rolling line direction. A positioning control device 8 is a wedge member whose lower surface is formed with an inclined surface 8a that is slightly gentler than the slope of the upper surface of the wedge member 6, and the shaft box 4 that rotatably supports the intermediate roll 2 is By the roll bending device 9, the wedge member 6.
It is designed to be able to move diagonally up and down along line 8.

In the above rolling mill, when a roll pending force P8 is applied diagonally upward to the intermediate roll 2 by the roll bending device E9, as is clear from the vector diagram, it moves from the center 01 of the intermediate roll 2 to the center of the upper back-up roll 3. It is clear that the force Pv directed towards 02 will be larger compared to the roll pending force PB, and the vertical component F of PY will also be larger than the roll pending force Pe.

FIG. 4 shows a third embodiment of the rolling mill of the present invention, which is an embodiment related to claim 2. In this embodiment, in the axle box 4, the inclined surface 4c with respect to the wedge member 6 is inclined toward the rolling line direction similarly to the inclined surface 6a of the wedge member B, but the front and rear side surfaces in the rolling line direction are It is vertical, and the positioning control device 7 functions as a roll bending device. In this case, when the wedge member 6 is pushed in the opposite direction to the rolling line direction by the positioning control device 7, the axle box 4 is pushed upward, so that it is moved from the center 01 of the intermediate roll 2 to the upper backup roll 3. As is clear from the vector diagram, the force pv directed toward the center 02 increases. Therefore, it is clear that the vertical component F of PY is also larger than the roll pending force pe.

FIG. 5 and FIG. 6 show a fourth embodiment of the present invention, which is an embodiment related to claim 3. In this embodiment, applying the roll pending force PB to the intermediate roll 2 diagonally upward with respect to the rolling line direction by the roll bending device 9 is the same as in the case of FIG. A support roll lO is provided in place of the wedge member 6, and the intermediate roll 2
I try to support. In this case, the roll pending force P8 is divided into a force PY directed from the center 0+ of the intermediate roll 2 to the center 02 of the upper backup roll 3, and a force Pz directed from the center 01 of the intermediate roll 2 to the center 01 of the support roll 10. The vertical component F of force PY becomes the effective vertical pending force.

In the case of this embodiment, in order for py>pB to hold, it is sufficient that the range A shown in FIG. 7 has the direction of day P. The angle γ can be determined once the position of each roll 2, 3.10 is determined.

In the figure, 11 is a lower work roll, and 12 is a lower back-up roll.

In the embodiments of the present invention, a case has been described in which a diagonal roll pending force is applied to an intermediate roll, but it is also possible to apply a diagonal roll pending force to a work roll. Of course, various changes may be made without departing from the spirit of the invention.

[Effects of the Invention] According to the rolling mill of the present invention, even if the roll pending force applied by the roll bending device is small, the vertical component of the roll bending device that effectively acts on the rolling rolls can be increased. Various excellent effects can be achieved, such as miniaturization and the overall compactness.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an outline of a first embodiment of the rolling mill of the present invention, FIG. 2 is a view taken along the arrows in the ■-■ direction of FIG. 1, and FIG. 3 is a schematic side view of a first embodiment of the rolling mill of the present invention. FIG. 4 is a side view showing an overview of the second embodiment of the rolling mill of the present invention; FIG.
The figure is a side view showing an outline of a fourth embodiment of the rolling mill of the present invention;
Fig. 6 is a view taken in the direction of the ■ arrow in Fig. 5, and Fig. 7 is a view of the
A diagram showing a range in which force py>roll force ps in an embodiment, and FIG. 8 is a side view showing an outline of an example of a conventional rolling mill. In the figure, 1 is an upper work roll (work roll), 2 is an intermediate roll, 3 is an upper back-up roll (backup roll),
4 is the axle box, 4a, 4b are the sides (slanted surfaces), 4c, 4e
is an inclined surface, 5 is an inclined guide member, 5a and 5b are wall surfaces (inclined surfaces), 6 is a wedge member, 6a is an inclined surface, 7 is a positioning control device (roll bending device), 9 is a roll bending device, IO is a support roll, D is the rolling line direction,
01.02.03 indicates the center of the roll. 1 1hC

Claims (1)

[Claims] 1) Approximately parallel to the front and rear sides of the axle box that rotatably supports the work roll or the axle box that rotatably supports the intermediate roll interposed between the work roll and the backup roll in the rolling line direction. In addition to providing an inclined inclined surface, providing inclined guide members inclined approximately parallel to each other on both front and rear sides in the rolling line direction,
A roll bending device that slidably fits an axle box into an inclined guide member so that the inclined surface of the axle box faces the inclined surface of the inclined guide member, and moves the axle box along the inclined surface of the inclined guide member. A rolling mill characterized by being equipped with. 2) An inclined surface inclined toward the rolling line is formed on the lower surface of the axle box that rotatably supports the work roll or the axle box that rotatably supports the intermediate roll interposed between the work roll and the backup roll. and a roll that supports an inclined surface formed on the lower surface of the axle box by a wedge member having an inclined surface parallel to the inclined surface of the axle box on the upper surface, and moves the axle box along the inclined surface of the wedge member. A rolling mill comprising a bending device or a roll bending device that moves the wedge member in a direction parallel to a rolling line direction. 3) An axle box that rotatably supports the work roll, or an axle box that rotatably supports the intermediate roll interposed between the work roll and the backup roll, has an axle box on one front and rear side in the rolling line direction, the lower side of which is the work roll or the intermediate roll. A roll bending device is provided, which has an inclined surface facing toward the rolling line so as to be close to the center of the roll, and pushes the axle box in a direction perpendicular to the inclined surface of the axle box. It is characterized in that short body support rolls for supporting work rolls or intermediate rolls are provided at both ends of the body of the roll provided with the roll bending device on the side opposite to the side provided with the roll bending device with respect to the center. rolling machine.