JP2000210706A - Composite sleeve roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve mechanical connection with a rolling roll using a sleeve roll having a simple shape, without providing a locking part equivalent to a torque receiving part on the side of the sleeve roll consisting of hard materials and with a peripheral member which is frictionally bonded to the sleeve roll. SOLUTION: The ring-like sleeve roll 2 consisting of the hard materials such as sintered hard alloy, ceramics and cermet is fit on the outer periphery of the hab 3 which is fixed to the shaft 6 of the rolling roll. By forming plural through holes 2b on the side faces in the axial direction of the sleeve roll 2, the three of the flange part 3a of the hab, sleeve roll 2 and hab ring 4 are integrally bonded with attaching bolts 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite sleeve roll used for rolling steel wires and bars.

[0002]

2. Description of the Related Art An assembling type roll can be manufactured separately since a roll portion requiring abrasion resistance and a shaft portion and a hub portion requiring a toughness can be separately manufactured. It is possible to equip a sleeve roll with excellent wear resistance using a hard material that cannot be used. When a key is used as a means for fixing a sleeve roll made of a hard material typified by a cemented carbide to a shaft portion of a rolling roll, processing of a key groove is difficult, and stress concentration occurs at a corner of the key groove. Cracks are not preferred.

[0003] In order to prevent the sleeve roll from rotating relative to the shaft during the rolling operation, a method is known in which the sleeve roll is pressed against the side surface of the shaft flange by a fastening nut screwed onto the shaft, and is fixed by frictional force. Have been. However, in order to prevent a slip accident, fixing with a frictional force higher than the torque during rolling may use an impact force of a hammer or the like for rotation of the tightening nut. The frictional force between the screw and the female screw of the tightening nut also increases, and the frictional force reduces the pressing force of the tightening nut, which may lead to a slip accident.

Japanese Unexamined Patent Publication No. 60-24209 proposes an assembling roll in which the materials of a sleeve roll and a shaft are appropriately selected. FIG. 9 is a cross-sectional view of the structure of the assembling roll, and FIG. 10 is a cross-sectional view taken along line XX of FIG.

In FIG. 9, reference numeral 101 denotes a sleeve roll having a caliber 101a made of cemented carbide, and an intermediate ring 102 made of a soft material other than cemented carbide inside the sleeve roll.
Is arranged. As shown in FIG. 10, the inner periphery of the sleeve roll 101 and the outer periphery of the intermediate ring 102 are engaged with each other with a smoothly undulating uneven surface, and a key 103 is interposed between the inner periphery of the intermediate ring 102 and the outer periphery of the shaft 100. , The sleeve roll 101 and the shaft 100 are integrally engaged.

The axial movement of the sleeve roll 101 is as follows.
Spacers 104 are arranged on both sides of the sleeve roll 101, and are restrained by the side surface of the flange portion 100 a of the shaft 100 and the side surface of the tightening nut 105. With such a structure, the shaft 1 is not damaged by the sleeve groove 101 from the key groove portion, and the shaft 1
The relative rotation of the sleeve roll 101 with respect to 00 can be reliably prevented. Further, it has been described that since the rolling roll portion has a double structure, the amount of cemented carbide used for the rolling roll portion can be reduced by the amount of the intermediate ring 102 portions, and an economical rolling roll is provided. I have.

[0007]

However, it is very difficult in terms of processing accuracy to fit the sleeve roll and the intermediate ring without any gaps on the uneven surface that smoothly undulates. The present invention uses a sleeve roll having a simple shape as much as possible, and does not provide a locking portion corresponding to a torque receiving portion on the sleeve roll side made of a hard material, and uses a peripheral member frictionally coupled to the sleeve roll. , To achieve a mechanical connection with the rolling rolls.

[0008]

A rolling roll in which a ring-shaped sleeve roll made of a hard material such as cemented carbide, ceramics or cermet is fitted on the outer periphery of a hub,
A unit in which a plurality of through holes are formed in the axial side surface of the sleeve roll and the hub flange portion, the sleeve roll, and the hub ring are integrally connected by mounting bolts, is a fastening nut or a hydraulic fixing mechanism which is a well-known conventional technique. And the like, and is fixed to the shaft of the rolling roll using frictional force.

A key is interposed between the outer periphery of the hub and the inner periphery of the hub ring so that the torque is also applied to the hub ring. Preferably, key grooves for engaging the key are provided on the outer periphery of the hub and the inner periphery of the hub ring. Either or both of them are formed in a bag shape to prevent the key from falling off, and the frictional force is fixed to the shaft of the rolling roll using a fastening nut or a hydraulic fixing mechanism, which is a commonly used technique. .

If a key is interposed between the inner periphery of the hub constituting the unit and the outer periphery of the shaft of the rolling roll to receive the rotational torque, the axial movement of the unit can be performed by using a well-known conventional technique such as a tightening nut or hydraulic fixing. It may be restrained by any mechanism.

A plurality of through holes are formed in the axial side surface of a ring-shaped sleeve roll made of a hard material such as cemented carbide, ceramics, cermet, etc., and hub rings are arranged on both sides thereof. And a unit that is integrally connected with mounting bolts using a fastening nut or a hydraulic fixing mechanism, which is a well-known and commonly used technique.
It is fixed to the shaft of the rolling roll using frictional force.

At least one of the hub rings has a key interposed between the inner periphery of the hub ring and the outer periphery of the shaft of the rolling roll or the side surface of the hub ring and the side surface of the shaft flange of the rolling roll to receive the rotational torque. The movement in the direction may be constrained by a well-known conventional technique such as a fastening nut or a hydraulic fixing mechanism.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. As a means for fixing the unit of the sleeve roll to the shaft of the rolling roll, it is more reliable and workability is better to use the hydraulic fixing mechanism shown in FIG. 1 than to use a fastening nut which is a well-known conventional technique shown in FIG. .

The unit 1 of the first embodiment shown in FIG. 1 comprises a ring-shaped sleeve roll 2 made of a hard material having a caliber 2a, such as a cemented carbide, ceramics or cermet.
A hub 3 made of alloy steel or the like is fitted around the hub ring 4 together with the hub ring 4, and a plurality of through holes 2 are formed on the axial side surface of the sleeve roll 2.
b, the mounting bolt 5 is inserted through the hub flange 3a and the sleeve roll 2 and the hub ring 4 are integrally frictionally connected to each other. The plurality of through holes 2b provided on the axial side surface of the sleeve roll 2 need only have a space through which the mounting bolt 5 passes, and may not be a precise circular shape or may be a cutout hole opened on the inner peripheral side. . In the case of the sleeve roll 2 made of a cemented carbide, if the through-hole is processed in the preliminary forming step before sintering, the through-hole 2b after sintering can be easily obtained. The number and size of the calipers 2a are appropriately selected in the order of the rolling process. However, if the thicknesses of the hub 3 and the hub ring 4 are adjusted so that the widths of the units 1 are all the same, the components of the unit 1 are formed. Easy to manage.

The unit 1 is aligned with the shaft 6 of the rolling roll, one side is brought into contact with the shaft flange 6a, and a friction force is generated and fixed to the other side using a hydraulic fixing mechanism. In the hydraulic fixing unit 10, the inner circumference of the inner cylinder 12 is screwed to the outer circumference of the shaft 6, and the outer cylinder 13 is overlapped on the outer side to form a hydraulic chamber. The airtightness of the hydraulic chamber 14 is determined by the liquid seal 1 provided on the flange portions of the inner cylinder 12 and the outer cylinder 13.
5 is maintained.

The inner cylinder 12 is screwed into the male screw 11 of the shaft 6 and has a tightening nut 16 and an annular shoulder 6.
It is positioned and fixed at b. The outer cylinder 13 is provided with an introduction hole 17 for attaching a plug (not shown) for relaying hydraulic pressure from a separately prepared hydraulic pump. At the end of the introduction hole 17, a communication hole 13a reaching the hydraulic chamber 14 is formed. Then, a disc spring 18 having a large spring constant is inserted between the outer cylinder 13 and the hub ring 4.

To fix the unit 1 to the shaft 6, the side surface of the tightening nut 16 is brought into contact with the outer cylinder 13, the unit 1 is temporarily tightened by the outer cylinder 13 via the disc spring 18, The fluid is pumped from a separately prepared hydraulic pump, the outer cylinder 13 is further moved to the unit 1 side, and the unit 1 is pressed to the shaft flange 6 a via the disc spring 18. The outer cylinder 13 and the tightening nut 16 moved after the temporary tightening
Turn the tightening nut 16 to the left and follow it to make it disappear. Thereafter, the hydraulic pressure of the hydraulic fixing unit 10 is released. As a result, the unit 1 is firmly and integrally fixed to the shaft 6 by the frictional force. The hydraulic fixing unit 10 of FIG. 1 shows the state at this point.

The clamping force applied to the unit 1 changes due to the temperature change during the rolling operation, but is absorbed by the elastic force of the disc spring 18. When removing the unit 1, the hydraulic pressure is applied to the hydraulic fixing unit 10 to release the elastic force of the disc spring 18 acting on the tightening nut 16, and then the tightening nut 16 is loosened rightward to remove the hydraulic chamber 14. Spring 1
Eliminate the repulsion force of 8. Thereafter, if the tightening nut 16, the hydraulic fixing unit 10, and the disc spring 18 are removed in this order, the unit 1
Can be removed.

If the other purpose of the unit 1 of the first embodiment is to reduce the volume of the hard material of the sleeve roll 2, the comparative example shown in FIG. 2 is more effective. However, in the comparative example, since a part of the tension of the mounting bolt 5 is used to compress the hub 23 and the hub ring 24, the force for pinching the sleeve roll 22 is reduced, and the unit 1 is pressed from the side using the hydraulic fixing mechanism. Also, when fixing the sleeve roll 22 to the shaft 6, there is a problem that the force of the hydraulic fixing mechanism is not utilized to the utmost and the sleeve roll 22 cannot be pressed as expected.

In FIG. 2, the unit 20 is the same as the unit 1 in that the sleeve roll 22 is fitted on the outer periphery of the hub 23 together with the hub ring 24, but the mounting bolt 5 has two parts, the hub 23 and the hub ring 24. And combine
The sleeve roll 22 is indirectly frictionally connected. The width L1 of the sleeve roll 22 and the fitting width L2 of the hub 23 are L
1> L2, and the height of the ring-shaped protrusion 24a provided to prevent bending of the hub ring 24
L, if L1 <△ L + L2, the hub ring 2
Until the deformation of 4 becomes L1 = △ L + L2, the tension of the mounting bolt 5 does not contribute to the clamping force of the sleeve roll 22. When L1> △ L + L2, the sleeve ring 22 cannot be clamped accurately because the hub ring 24 bends in an umbrella shape.

Next, the variation of the clamping force applied to the sleeve roll 2 when an external compressive force is applied by the hydraulic fixing mechanism will be described with reference to FIG. 8, comparing the first embodiment with a comparative example. In FIG. 8, the vertical axis represents the clamping force, the horizontal axis represents the amount of deformation of the related member in the axial direction, and the elastic modulus of each related member is schematically represented by inclinations α and β.

Considering the first embodiment, the mounting bolt 5 of the related member is extended, and the sleeve roll 2 + hub 3
+ The hub ring 4 is contracted, and the clamping force of the sleeve roll 2 in the unit 1 alone by the mounting bolt 5 is Ff
Becomes Then, the external compressive force Wa by the hydraulic fixing unit 10 is added, and the amount of Ft is consumed to further compress the sleeve roll 2 + the hub 3 + the hub ring 4, and Fa
Although the clamping force of the mounting bolt 5 is reduced, the total clamping force on the sleeve roll 2 is Fc1 = Ff + F
increase to t.

However, in the comparative example, depending on the height ΔL of the ring-shaped projection 24a, the external compression force Wa
Is consumed to compress the hub 23 + hub ring 24, the actual external compression force Wa that contributes to the clamping force is smaller than in the first embodiment.

FIG. 3 shows a unit 30 of the second embodiment. In the unit 30, a ring-shaped sleeve roll 2 made of a hard material such as a cemented carbide, ceramics, or cermet having a caliber 2a is the same as that of the first embodiment, and a hub ring 4 made of alloy steel or the like is provided on both side surfaces thereof. Are arranged, and mounting bolts 5 are inserted into a plurality of through holes 2b formed on the axial side surface of the sleeve roll 2, so that the hub ring 4 and the sleeve roll 2 are integrally frictionally connected to each other. The plurality of through holes 2b provided on the axial side surface of the sleeve roll 2 need only have a space through which the mounting bolt 5 passes, and may not be a precise circular shape or may be a cutout hole opened on the inner peripheral side. .

The number and size of the calipers 2a are appropriately selected in the order of the rolling process. However, if the thickness of the hub ring 4 is adjusted so that the widths of the units 30 are all the same, the components of the units 30 Easy to manage. Also in the second embodiment, the external compression force Wa
Is added, the clamping force on the sleeve roll 2 increases.

Next, based on the first and second embodiments, the unit 1 can be formed by another well-known conventional technique without using a hydraulic fixing mechanism.
Alternatively, a description will be given of a means by which the movement of the shaft 30 in the axial direction is restricted so that the integration into the shaft 6 is reliably achieved.

FIG. 4 shows a unit 4 using the first embodiment.
Indicates 0. The unit 40 is made of a hard material such as a cemented carbide, ceramics, cermet or the like having a caliber 2a.
A hub ring 42 on the outer periphery of a hub 43 made of alloy steel or the like.
The hub flange portion 43a, the sleeve roll 2 and the hub ring 42 are integrally frictionally joined together by inserting the mounting bolts 5 into a plurality of through holes 2b on the axial side surface of the sleeve roll 2. It is.

The key 41 is interposed between the outer periphery of the hub 43 and the inner periphery of the hub ring 42 as shown by an arrow A, and the key groove on the hub 43 side is formed in a bag shape. Alternatively, the key groove on the hub ring 42 side is formed in a bag shape as shown by an arrow B. With such a configuration, the rotation torque of the sleeve roll 2 is received by the hub flange portion 43a and is also received by the hub ring 42 in a shared manner. Since the hub 43 and the hub ring 42 are made of alloy steel or the like, engagement means using key grooves may be employed.
If the key grooves of the hub 43 and the hub ring 42 are bag-shaped, the keys 41 can be prevented from falling off.

FIG. 5 shows a unit 5 using the first embodiment.
Reference numeral 0 denotes a rolling roll fixed to the shaft 6 by using a fastening nut 52 which is a well-known conventional technique. The unit 50 is
A ring-shaped sleeve roll 2 having the same configuration as that of the first embodiment made of a hard material such as a cemented carbide, ceramics, or cermet having a caliber 2a is fitted together with the hub ring 4 on the outer periphery of a hub 53 made of an alloy steel or the like. The hub bolt 53 is inserted through a plurality of through holes 2b on the axial side surface of the sleeve roll 2, and the hub flange 53a, the sleeve roll 2 and the hub ring 4 are integrally frictionally connected.

A key 51 is interposed between the inner periphery of the hub 53 and the outer periphery of the shaft 6 so that the shaft 6 and the unit 50
Are fixed together. Since the hub 53 and the shaft 6 are formed from alloy steel or the like, an engaging means using a key groove may be employed.

FIG. 6 shows a unit 6 using the second embodiment.
Reference numeral 0 denotes a rolling roll fixed to the shaft 6 by using a fastening nut 52 which is a well-known conventional technique. The unit 60
The ring-shaped sleeve roll 2 made of a hard material such as a cemented carbide, ceramics, or cermet having the caliber 2a has the same form as that of the first embodiment, and a hub ring 64 made of alloy steel or the like is arranged on both side surfaces thereof. , Sleeve roll 2
The mounting bolts 5 are inserted through a plurality of through holes 2b on the side surface in the axial direction, and the two hub rings 64 and the sleeve roll 2 are integrally frictionally connected.

Then, at least one of the hub rings 64
The unit 60 is integrally fixed to the shaft 6 with the key 61 interposed between the inner periphery of the shaft 6 and the outer periphery of the shaft 6. Hub ring 6
Since the shaft 4 and the shaft 6 are made of alloy steel or the like,
An engaging means using a key groove may be employed.

FIG. 7 shows a unit 7 using the second embodiment.
Reference numeral 0 denotes a rolling roll fixed to the shaft 6 by using a fastening nut 52 which is a well-known conventional technique. The unit 70
The ring-shaped sleeve roll 2 made of a hard material such as a cemented carbide, ceramics or cermet having the caliber 2a is the same as that of the first embodiment, and a hub ring 74 made of alloy steel or the like is arranged on both side surfaces thereof. , Sleeve roll 2
The mounting bolt 5 is inserted through a plurality of through holes 2b on the axial side surface of the sleeve roll 2, and the hub ring 74 and the sleeve roll 2 are frictionally connected integrally.

Then, the key 70 is interposed between the side surface of one hub ring 74 and the side surface of the shaft flange portion 6a, and the unit 70 is integrally fixed to the shaft 6. Since the hub ring 74 and the shaft flange 6a are made of alloy steel or the like, an engaging means using a key groove may be employed. Needless to say, the units 40, 50, 60, and 70 can be integrally fixed to the shaft 6 using a hydraulic fixing mechanism or the like.

[0035]

According to the present invention, a ring-shaped sleeve roll made of a hard material typified by a cemented carbide is used for a roll portion of a roll-type roll which is required to have wear resistance. Using alloy steel for the hub and hub ring, fixing means such as a key for mechanically receiving the rotational torque of the rolling roll include a hub integrally connected with a plurality of mounting bolts penetrating the axial side surface of the sleeve roll. Since the sleeve roll is interposed between the hub ring and the shaft portion and fixed by friction welding, the sleeve roll does not break due to stress concentration caused by the rotational torque.

Further, since the sleeve roll is made into a unit type using members for different purposes, the entire sleeve roll is made of a hard material which requires abrasion resistance.
An economical roll can be provided. Further, since all the forces pressing the unitized sleeve roll in the axial direction act directly on the sleeve roll, the pressing force is maximized and the sleeve roll is firmly fixed.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view of a sleeve roll unit 20 of a comparative example.

FIG. 3 is a sectional view of a sleeve roll unit 30 of the present invention.

FIG. 4 is a sectional view of a sleeve roll unit 40 of the present invention.

FIG. 5 is a sectional view of a sleeve roll unit 50 of the present invention.

FIG. 6 is a sectional view of a sleeve roll unit 60 of the present invention.

FIG. 7 is a sectional view of a sleeve roll unit 70 of the present invention.

FIG. 8 is a diagram illustrating a change in a clamping force applied to a sleeve roll when an external compressive force is applied.

FIG. 9 is a sectional view of a conventional assembling roll.

FIG. 10 is a sectional view taken along the line XX of FIG. 9;

[Explanation of symbols]

1, 20, 30, 40, 50, 60, 70: Sleeve roll unit 2, 22: Sleeve roll 3, 23, 43, 53: Hub 3a, 23a, 43a, 53a: Hub flange portion 4, 24, 64, 74 : Hub ring 5: Mounting bolt 6: Shaft 6 a: Shaft flange 41, 51, 61, 71: Key

Claims (6)

[Claims] 1. A rolling roll in which a ring-shaped sleeve roll made of a hard material such as cemented carbide, ceramics or cermet is fitted on the outer periphery of a hub, and a plurality of through holes are formed in an axial side surface of the sleeve roll. And a hub sleeve portion of the hub, the sleeve roll, and the hub ring, which are integrally connected by a mounting bolt. 2. The composite sleeve roll according to claim 1, wherein a key is interposed between an outer periphery of the hub and an inner periphery of the hub ring. 3. A key groove for engaging with the key is provided on an outer periphery of the hub and an inner periphery of the hub ring, and one or both of the key grooves are formed in a bag shape. The composite sleeve roll according to claim 2. 4. The composite sleeve roll according to claim 1, wherein a key is interposed between an inner periphery of the hub and an outer periphery of a shaft of the rolling roll. 5. A plurality of through holes are formed in an axial side surface of a ring-shaped sleeve roll made of a hard material such as cemented carbide, ceramics, cermet, etc., and hub rings are arranged on both sides of the sleeve roll. A composite sleeve roll wherein the three members of the hub ring and the hub ring are integrally connected by a mounting bolt. 6. A key is interposed at least on one of the hub rings on the inner periphery of the hub ring and the outer periphery of the shaft of the rolling roll, or on the side surface of the hub ring and the side surface of the shaft flange of the rolling roll. A composite sleeve roll according to claim 5.