JP2720142B2 - Crown roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crown roll for a rolling line, for example, a pinch roll for a winding machine for a slitter line, a deflector roll, an expander roll for preventing wrinkling of a thin plate or film, and a hearth for a thin plate conveying line. The present invention relates to a crown roll having a component in a roll axial direction at a peripheral speed of an outer peripheral portion suitable for use as a roll, a looper roll, or the like.

[0002]

2. Description of the Related Art When a normal straight roll is used as a crown roll, for example, when used as a pinch roll, the pressing force changes in the roll axis direction. Further, when used as a deflector roll, the meandering of the strip and the occurrence of wrinkling of the thin plate and the film tend to be problems.

In order to solve the above-mentioned drawbacks of the conventional crown roll, a roll shaft (fixed shaft) is curved, and a rubber lining having a crown is rotatably attached to the roll shaft via a bearing and a bobbin. A crown roll (JP-A-61-114722) has been proposed. In the curved shaft crown roll disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 61-114722, a part of the outer periphery is linear in the roll axis direction. Therefore, when this curved shaft crown roll is used as a pinch roll, the pressing force can be made uniform, the outer peripheral speed is faster toward the center, and the outer peripheral speed has a roll axial component. If it is used, meandering can be prevented. Furthermore, when this curved axis crown roll is used as a deflector roll, it can effectively prevent the meandering of strips and the occurrence of wrinkles in thin plates and films by adjusting the bending direction of rotating the roll axis and using the peripheral speed appropriately. can do. However, Japanese Patent Application Laid-Open No. 61-114
The curved shaft crown roll disclosed in Japanese Patent No. 722 has a poor roll shaft bending accuracy, and particularly the roll shaft is easily bent three-dimensionally. Therefore, the crown amount varies, and it is difficult to manufacture a roll having a small crown amount or a large crown amount. Further, in the case of a large-sized roll, the roll axis becomes thick, but it is difficult to accurately curve such a large-diameter axis. Furthermore, it is difficult to accurately fit the curvature of the roll shaft in a plane, and therefore, when used for high-load, high-speed rotation, uneven rotation occurs. For this reason, the curved shaft crown roll is required to have L / D ≦ 3.3 (L: length in the roll axis direction, as required in the steel process line,
D: Roll diameter), it is difficult to manufacture a large diameter roll. Furthermore, after the rubber sleeve alone is crowned in the assembly procedure, it is fitted to a roll, which reduces the accuracy after assembly,
There is a problem that the crown processing of the rubber sleeve is troublesome and costly.

[0004] As a crown roll for solving the above-mentioned drawbacks of the curved shaft crown roll disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 61-114722, as shown in FIG. A shaft portion 52 eccentric to the body portion 51 by δ is provided, and the shaft portions 52, 52 are provided with bearing support members 54, 54 having an eccentric amount δ capable of adjusting the angle via angle adjusting devices 53, 53. Outer bearings of a plurality of self-aligning bearings 55 arranged symmetrically from the center of the body 51 are fitted to the bearing support members 54, 54, and a sleeve 56 is fitted to the bearings 55, 55 outer ring. By operating the angle adjusting devices 53, 53 and rotating the bearing support members 54, 180 ° C., as shown in FIG.
6 has a curved crown roll (JP-A-2-25511
And the like have been proposed.

[0005]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Laid-Open No. 2-255 is disclosed.
The crown roll disclosed in Japanese Patent Publication No.
Although the above-mentioned disadvantages of the curved shaft crown roll disclosed in Japanese Patent Application Laid-Open No. 114722 can be solved, a difference in rotation speed occurs between the left and right rolls bent during the passing, and the rubber sleeve at the center of the roll has a torsional torque due to the difference in rotation speed. As a result, there was a problem in the durability of the rubber sleeve, for example, the rubber sleeve was damaged in a short time.

An object of the present invention is disclosed in Japanese Patent Application Laid-Open No. Hei 2-25521.
An object of the present invention is to provide a crown roll of a rubber sleeve having improved strength against breakage due to a torsion torque on the rubber sleeve, which is a drawback of the crown roll disclosed in Japanese Patent No.

[0007]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object. As a result, breakage of the rubber sleeve according to torsion torque is a disadvantage of the crown roll disclosed in Japanese Patent Laid-Open No. 2-255211 is Rutotomoni increase the strength by filling the internal rubber sleeve synthetic fibers as a reinforcing material, the left and right The inventors of the present invention have found that the metal sleeve can be provided with two or more claws and the metal sleeve can reduce the torsion to reduce the torsion.

That is, according to the present invention, on both sides of a straight roll shaft body portion, a shaft portion which is eccentric by δ with respect to the roll shaft body portion is provided, and the eccentric amount of which the angle can be adjusted via the angle adjusting device is provided on the shaft portion. A bearing support member of δ is provided, and among the plurality of self-aligning bearings arranged symmetrically from the center of the roll shaft body, an outerly arranged bearing is fitted to the bearing support member, and a metal sleeve is attached to the outer ring of the bearing. in the crown roll was fitted, the above-mentioned
Two on the left and right metal sleeves fitted on the outer ring of the bearing or
When a plurality of uneven portions are provided and the uneven portions are engaged with each other,
With a rubber sleeve fitted with a reinforcing material inside.
And a crown roll.

[0009]

According to the crown roll of the present invention, two or more concave and convex portions are provided on the left and right metal sleeves fitted on the outer ring of the bearing, and the concave and convex portions are engaged with each other and a reinforcing material is inserted into the rubber. Since the sleeves are fitted, even if there is a difference in rotational speed between the left and right rolls bent during the passing, they rotate simultaneously because the concave and convex portions of the left and right metal sleeves are engaged.
The torsional torque is absorbed by the left and right metal sleeves,
The torsional load on the rubber sleeve at the center of the roll is reduced. Further, since a rubber sleeve having a reinforcing material inserted therein with improved strength is used, breakage of the rubber sleeve is prevented, and the durability of the rubber sleeve is greatly improved.

In the crown roll according to the present invention, the roll is assembled by inserting a straight roll shaft after aligning the center hole of the self-aligning bearing, and then rotating the bearing support members on both sides to adjust the inclination angle of the metal sleeve. adjust. Therefore, the crown amount can be accurately adjusted after the roll is assembled. On the other hand, the crown amount of the roll outer peripheral surface in the predetermined rotation angle direction changes according to the rotation angle of the fixed roll shaft as required. Therefore, when used as a pinch roll, the pressing force can be easily made uniform. Further, when used as a roll for suppressing the strip, the component in the roll axis direction can be freely set as necessary.

Further, as shown in FIG. 7 (a), the crown roll of the present invention bends the roll 41 into a V-shape in the traveling direction of the plate 42 so that the straightening force of the plate 42 is directed toward the center. The plate 42 is centered to prevent meandering. In addition, when the plate thickness is thin, if the straightening force is too strong, buckling occurs at the center of the plate. Therefore, as shown in FIG. 7B, the roll 41 is bent in the forward direction of the plate 42. Thus, the straightening force of the plate 42 can be applied outward, and the buckling of the plate 42 can be suppressed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a crown roll according to the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view of a crown roll according to the present invention, FIG. 2 is a partially cutaway view of a concave and convex claw method of a central meshing concave and convex portion of left and right metal sleeves fitted on outer rings of a bearing, and FIG. FIG. 4 is a partially cutaway view of a key system of a central meshing concave and convex portion of left and right metal sleeves to be fitted, FIG. 4 is a cross-sectional view of a rubber sleeve fitted to the metal sleeve, and FIG. FIG. 6 is a partially enlarged sectional view showing another example of the section shown in FIG. 4A. In FIG. 1, 1 is a straight roll shaft body, 2 is a shaft portion projecting from both sides of the roll shaft body 1 eccentrically by δ with respect to the roll shaft body 1, 3 is a shaft portion 2, 2.
And is rotatably provided by angle adjusting devices 4 and 4 composed of gear devices.

Reference numerals 5 and 5 denote bearings provided at the center of the roll shaft body, reference numerals 6 and 6 denote bearings provided on the bearing support members 3 and 7, reference numeral 7 denotes a bearing fitted between the bearings 6 and 6 and outer rings of the bearings 5 and 5. As shown in FIG. 2, the left and right metal sleeves 8 and 9 are engaged with a plurality of concave and convex claws 10 and 11 at the center, or as shown in FIG. , 9 have a central portion where a plurality of keys 12 and key grooves 13 are engaged with each other, and a rubber sleeve 14 is fitted. As shown in FIG. 4, for example, the rubber sleeve 14 has a reinforcing member 16 such as a synthetic fiber cord disposed at the center of a main rubber 15 such as neoprene rubber, and a metal ring 17 bonded to both ends by baking. Also, as shown in FIG. 5, the rubber sleeve 14 may be provided with an oil-resistant rubber 18 at the innermost portion in consideration of the leakage of the lubricant from the lubrication surface of the bearing on the inner surface, or as shown in FIG. When the hardness of the outer layer is changed, the hardness of the outer layer main body rubber 15 is adjusted to the hardness of the inner layer oil resistant rubber 18.
If the same material is used as the adhesive layer 19 between the outer layer and the inner layer, the integrity of the rubber is further ensured, and the rubber sleeve 14 having high strength can be formed. In addition, the reinforcing material 16
With a layer, the strength can be further improved. Both ends of the sleeve 7 are supported by bearing stoppers 20. 21 is a screw ring for fixing the bearings 6, 6;
An arbor fixing mechanism for fixing to arbor 3 and 23. An arbor comprising a straight roll shaft body 1 and bearings 2 and 2 eccentric by δ is fixed, and the sleeve 7 is configured to rotate at the speed of the strip.

With the above configuration, FIG.
When the axis of the bearing support member 3 coincides with the axis of the roll shaft body 1, the surface of the sleeve 7 is flat as shown in FIG. In this state, the sleeve 14 is bent by operating the angle adjusting devices 4 and 4 to rotate the bearing support members 3. In this case, since the left and right metal sleeves 8 and 9 are engaged with the plurality of concave and convex claws 10 and 11 at the center or the plurality of keys 12 and the key grooves 13 at the center, the metal sleeves 8 and 9 are bent during the passage. The torsional torque generated by the rotational speed difference between the left and right rolls is absorbed by the metal sleeves 8 and 9 and the rubber sleeve 1
4, the torsional load is reduced. Further, the rubber sleeve 14
Since the rubber sleeve 1 is reinforced by the reinforcing member 16, the strength is improved, and the damage caused by the torsional torque caused by the rotation speed difference between the right and left rolls bent during the passing is suppressed.
4 greatly improves the durability. The degree of curvature of the sleeve 7 is adjusted by operating the angle adjustment devices 4 and 4,
This makes it possible to prevent the strip from meandering.

Further, a large-size roll in which a large thrust force is generated has a thrust bearing 5 as shown in FIGS.
By providing the thrust bearings 7 and 57, the thrust force applied to the sleeve 56 can be received by the thrust bearings 57 and 57. Further, the bearings 6, 6 and the shaft stoppers 20, 2,
0, a seal mechanism for sealing between the screw rings 22 and 22 and the bearing support members 3 and 3 and the bearings 2 and 2 is further provided by an oil passage provided at the center of the shaft portions 2 and 2 using a rotary joint (not shown). If the bearing is configured to be supplied with oil, it is possible to increase the withstand load with the life of the bearing.

[0016]

As described above, in the crown roll of the present invention, meandering and buckling of the strip can be prevented by controlling the degree of curvature of the sleeve.
To absorb torsional torque and to withstand rubber sleeves
Because the degree of torsion has been increased, the torsion load of the rubber sleeve has been reduced,
Damage due to torsion torque can be suppressed, and the durability of the rubber sleeve can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a crown roll of the present invention.

FIG. 2 is a partially cutaway view of a concave-convex claw method of a central meshing concave-convex portion of left and right metal sleeves fitted on outer rings of a bearing.

FIG. 3 is a partially cutaway view of a key type uneven portion at the center of the left and right metal sleeves fitted on the outer ring of the bearing.

FIG. 4 is a cross-sectional view of a rubber sleeve fitted to a metal sleeve.

FIG. 5 is a partially enlarged cross-sectional view showing an example of a part shown in FIG. 4A.

FIG. 6 is a partially enlarged cross-sectional view showing another example of the portion shown in FIG. 4A.

7A and 7B show a method of using the crown roll of the present invention. FIG. 7A shows a case where the crown roll is used in a bent shape in the traveling direction of the plate, and FIG. It is explanatory drawing in the case of bending and using.

FIG. 8 is a sectional view of a conventional crown roll.

FIG. 9 is a cross-sectional view showing a state where a sleeve of a conventional crown roll is curved.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 51 Roll shaft body part 2, 52 Shaft part 3, 54 Bearing support member 4, 53 Angle adjusting device 5, 6 Bearing 7, 56 Sleeve 8, 9 Metal sleeve 10 Concave claw 11 Convex claw 12 Key 13 Key groove 14 Rubber Sleeve 15 Body rubber 16 Reinforcement material 17 Metal ring 18 Oil resistant rubber 19 Adhesive layer 20 Bearing stopper 21 Screw ring 22 Arbor fixing mechanism 23 Mill housing 41 Roll 42 Plate 55 Self-aligning bearing 57 Thrust bearing

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-255211 (JP, A) JP-A 62-155914 (JP, U) JP-A 61-4855 (JP, U) JP 1-1985 11645 (JP, Y2)

Claims (1)

(57) [Claims] 1. A bearing having an eccentric amount of δ that is adjustable in angle via an angle adjusting device on both sides of a straight roll shaft body, provided with shafts eccentric with respect to the roll shaft body by δ. A support member was provided, and among the plurality of self-aligning bearings arranged symmetrically from the center of the roll shaft body portion, an outerly arranged bearing was fitted to the bearing support member, and a metal sleeve was fitted to the outer ring of the bearing. In the crown roll, fit on the outer ring of the bearing
Two or more irregularities on the left and right metal sleeves.
In addition to engaging the irregularities, a reinforcing material is
A crown roll having a rubber sleeve inserted therein .