JPH0248323B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bearing structure for a deflection adjusting roll.

Generally, roll equipment (such as paper machine presses and calenders) used to manufacture strips has a structure that compensates for roll deflection caused by load and makes the linear pressure between the rolls uniform. It will be done. Fig. 1 is a conventional example of the arrangement of a roll device used in a press, Fig. 2 is a longitudinal cross-sectional view of the same roll,
FIG. 3 is a sectional view taken along line A--A in FIG. 2.

In FIG. 1, roll 1 has a structure that can compensate for deflection, roll 2 is a roll that cooperates with roll 1, and roll 2 is supported by bearings 3 at both ends and fixed to the upper part of stand 4. It is rotatably fixed by a beam 5. Further, the roll 1 consists of a roll cell 8 rotatably supported on a roll shaft 7 fixed to an arm 6, and is configured to rotate due to frictional force with the roll 2. The arm 6 is swingably supported by the stand 4.

In FIGS. 2 and 3, a cylindrical roll cell 8 is rotatably supported at both left and right ends of the roll shaft 7 by spherical roller bearings 9, 9'. Also, inside the roll cell 8, the roll cell 8
, the inner peripheral surface of the roll shaft 7, and the bearing 9,
An annular space 10 defined by 9' is formed, and a rod-shaped member 11 is disposed in the upper part of the annular space 10 close to the inner circumferential surface of the roll cell 8.

On the other hand, inside the roll shaft 7, a hydraulic device 12 consisting of a plurality of cylinders and a piston paired with the cylinders is arranged in line in the axial direction, and supports a rod-shaped member 11 on the top of the piston. Further, the roll shaft 7 is provided with hydraulic passages 13, 13'.
The hydraulic device 12 is supplied with oil, and the annular space 10 is also supplied with oil.

When the roll cell 8 rotates, the hydraulic device 12 is actuated by the hydraulic pressure to push up the rod-shaped member 11, and the oil in the annular space 10 flows into the gap between the roll cell 8 and the rod-shaped member 11, but the oil is caused by centrifugal force. The wedge-shaped cross-sectional shape formed between the top surface of the rod-shaped member 11 and the inner circumference of the roll cell 8 flows along the inner circumferential surface of the roll cell 8 in the direction of arrow B due to the adhesive force and rotates together with the roll cell 8. It passes through the gap, generates hydraulic pressure to push up the roll cell 8, and generates a uniform linear pressure over the entire width of the working portion of the roll cell 8.

By the way, the paper sheet 14 is guided in the direction of arrow A' between rolls 1 and 2 as shown in FIG. dehydrated.

Generally, the upper and lower rolls are pressurized before the strip material enters between the rolls, so the roll cell 8 is pushed from the outside by the other roll, and the cell is pushed up by hydraulic pressure from the inside of the cell so that it does not bend. There is no problem, but there is a gap equivalent to the thickness of the plate between the rolls, such as in a steel rolling mill, until the strip is inserted between the rolls, and if hydraulic pressure is applied beforehand,
That is, when hydraulic pressure is applied to push up the cell while maintaining a gap, the force pushing down the cell is small, so an excessive force equivalent to the hydraulic pressure acts on the bearings at both left and right ends.

However, since this bearing must be installed inside the cell, its dimensions are limited and it is difficult to withstand the excessive force mentioned above.

The present invention was proposed in order to solve the above-mentioned conventional drawbacks, and uses a connecting member to prevent the bearing box that holds the journal attached to the cell and the bracket that holds the roll shaft from shifting relative to each other. By connecting the rolls, it can be used when applying deflection adjustment rolls to rolling mills, etc., and the cell can be pushed up with hydraulic pressure before the rolled material enters between the rolls, and the roll cell mounting journal can be mounted using this hydraulic pressure. The purpose of the present invention is to provide a roll bearing structure in which a large force is applied to the roll, and this is received by the outer bearing box.

Embodiments of the present invention will be explained below with reference to the drawings. FIG. 4 shows an example of the arrangement of a deflection adjusting roll having a bearing structure according to an embodiment of the present invention when used in a rolling mill, and FIG. Longitudinal sectional view, No. 6
The figure is a cross-sectional view of the deflection adjusting roll, and FIG. 7 shows an example in which a highly rigid beam is provided below the roll.

Now, in FIG. 4, the upper roll 21 is positioned by a lowering device 26 via an upper back up roll 24 provided in contact therewith. Further, the lower roll 22 is supported from below via a lower back up roll 25 provided in contact with the lower roll 22. The frame 23 holds these rolls and the rolling down device 26.

The material to be rolled is rolled on the roller table 27, passed between the upper roll 21 and the lower roll 22, and guided in the direction of arrow C. The deflection adjustment rolls are applied to the upper back-up roll 24 and the lower back-up roll 25, and the workpiece 28 to be rolled is rolled uniformly over its entire width.

In FIGS. 5 and 6, the left side shows the bearing part on the operating side X, the right side shows the bearing part on the driving side Y, and the center part shows the roll cell part. Since the bearing part on the driving side Y is structurally almost the same as the bearing part on the operating side X,
The structure of the bearing section will be explained only for the operation side X.

A journal 32 is bolted to the end of the roll cell 31, which has a cylindrical shape in the figure.
The journal 32 is rotatably held in the bearing box 30 via a metal 33 inserted into the outer periphery.

Further, a pair of spherical bushings 37 are inserted into the end of the roll shaft 36, and by attaching them to the ends of the brackets 38 bolted to the bearing box 30, the holding center of the spherical bushings 37 is aligned approximately with the bearing box 30.
is held in the bearing box 30 so as to overlap with the holding center of the bearing box 30. The outer bushing of this spherical bushing 37 is fixed to the bracket 38 by a presser foot 39, and the inner bushing is fixed to the roll shaft 36 by pressers 40 and 41.

An annular space 48 is formed inside the roll cell 31 and is defined by the inner peripheral surface of the cell, the outer peripheral surface of the roll shaft 36, the journal 32, and the bracket 38. A rod-shaped member 42 is arranged above the annular space 48 and close to the circumferential surface of the roll cell 31 .

On the other hand, an oil hole 43 connected to an external oil pump (not shown) is provided in the roll shaft 36, and a plurality of oil holes 44 communicate with the oil hole 43.
Moreover, a plurality of small holes 45 are provided in the rod-shaped member 42 and communicate with the oil hole 44 .

Next, the operation will be described. When the roll cell 31 rotates, oil is supplied to the roll shaft 36 from the pressure oil pump. This oil passes through the oil hole 43 and enters the lower part of the rod-shaped member 42 from the oil hole 44, and pushes up and holds the rod-shaped member 42. Further, a part of the oil in the oil hole 44 passes through the small hole 45 and enters the space between the inner peripheral surface of the roll cell 31 and the upper part of the rod-shaped member 42, and lubricates the contact surface between the roll cell 31 and the rod-shaped member 42.

Furthermore, before the material to be rolled 28 enters between the upper roll 21 and the lower roll 22, the upper back-up roll 24 and the lower back-up roll 2 are separated by hydraulic pressure.
5 and wait by pushing up the roll cell 31.

Although a large force is applied to the journal 32 at the end of the roll cell 31 due to the oil pressure, this force is received by the bearing box 30 via the metal 33.

In addition, the reaction force applied to the roll shaft 36 is generated when the spherical bushing 37 is attached to the end of the bracket 38 (offset from the center of the bracket 38), and the holding center of the spherical bushing 37 is located approximately at the holding center of the bearing box 30. Therefore, no moment is applied.

FIG. 7 shows another embodiment, in which a highly rigid beam 49 is provided below the roll 31, and this beam 49
The structure is such that the bracket 38 that holds the roll shaft 36 and the bearing box 30 that holds the journal are connected by a connecting member so that their mutual positions do not move. There is no difference in example and effect.

As explained in detail above, the present invention has a structure in which a bearing box that holds a journal attached to a cell and a bracket that holds a roll shaft are connected using a connecting member so that their positions do not shift. Therefore, when hydraulic pressure is applied, both shaft ends do not move, so a crown can be effectively applied to the roll cell. In addition, when the rolled material is put between the upper and lower rolls and pressurized, a large force is applied to the roll cell mounting journal due to the pressure, but this can be received by the outer bearing box, so that the rolled material is placed between the rolls. It is possible to apply hydraulic pressure to push up the cell before applying pressure before entering the bearing, making it possible to obtain a bearing structure that can withstand excessive force compared to conventional methods in which hydraulic pressure cannot be applied before applying pressure. can.

[Brief explanation of drawings]

Fig. 1 is a side view showing an example of a roll device used in a conventional press, Fig. 2 is a front sectional view of a roll in the same device, Fig. 3 is a sectional view taken from A to A in Fig. 2, and Fig. The drawings are a side view of a case where the bearing structure of a deflection adjusting roll according to an embodiment of the present invention is used in a rolling mill, FIG. 5 is a front cross-sectional view of the deflection adjusting roll, FIG. 6 is a side cross-sectional view, and FIG. The figure is a front sectional view of a deflection adjusting roll showing another embodiment. Explanation of main parts of the figure, 30...Bearing box, 31...Roll cell, 32...Journal, 33...Metal, 3
6...Roll axis, 38...Bracket.

Claims (1)

[Claims] 1. In a roll in which the deflection of the cell can be adjusted by applying hydraulic pressure inside the roll cell, the bearing box that holds the journal attached to the cell and the bracket that holds the roll shaft are connected so that their relative positions do not shift. A bearing structure for a deflection adjustment roll, characterized in that it is connected using members.