JP2000288609A - Rolling roll - Google Patents

Abstract

(57) [Problem] To ensure that even when an impact load is applied at the time of rolling, a small slippage is prevented from occurring on the rolling ring (5A), and the rolling is required to have strict processing accuracy. A rolling roll capable of sufficiently satisfying the conditions is provided. An annular rolling ring (5A) and a spacer (4B) are fitted in the direction of the axis (O) around the outer circumference of a cylindrical roll shaft (1) rotated around an axis (O). An annular portion 13 protruding toward the spacer 4B side is formed on a side surface of the 5A facing the spacer 4B side, and a large number of engaging concave portions 14... On the 4B side, engaging projections 17 that engage with these engaging recesses 14 and engage in the circumferential direction are formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling roll used for rolling a strip, a plate, a bar and the like.

[0002]

2. Description of the Related Art In a rolling roll of this type, an annular rolling ring which comes into contact with a workpiece is formed from a hard material such as a cemented carbide, and this rolling ring and an annular spacer are inserted into a roll shaft. Conventionally, a roll ring is fixed to a roll shaft by pressing the roll ring to the center axis direction of the roll shaft or by pressing the inner peripheral surface of the roll ring to the outer periphery of the roll shaft. However, since all such rolling rolls fix the rolling ring to the roll shaft only by frictional force due to pressing, if the load due to contact with the workpiece exceeds the above-mentioned frictional force, the rolling ring and the spacers and rolls may be used. Sliding may occur in the circumferential direction between the shaft and the shaft, which may hinder stable rolling.

[0003] In order to cope with rolling conditions in which a large load acts or rolling conditions in which high working accuracy is required such that slippage of the rolling ring is not allowed, the rolling ring and the spacer are inserted into the roll shaft. When pressing in the direction of the central axis, a V-shaped or slanted inclined portion is formed on the contact surface between the rolling ring and the spacer which come into contact with each other, for example, proposed in Japanese Utility Model Laid-Open No. 6-48901. . However, in such a rolling roll, since the rolling ring and the spacer are circumferentially engaged by the inclined portion, the sliding in the circumferential direction can be suppressed and the rolling ring can be stably fixed to the roll shaft.

[0004]

However, even in a roll having such an inclined portion, if a larger load acts on the roll ring in a shocking manner during the rolling process, the roll ring and the spacer may be disturbed. Shifts along the inclined portion, and it is inevitable that a slight slippage occurs between the rolling ring, the spacer, and the roll shaft. For this reason, it has been difficult to satisfy such a rolling condition that even with such a rolling roll, a stricter processing accuracy is required, which does not allow a minute slip.

[0005] In recent years, in this type of rolling roll, as the above-mentioned rolling ring that comes into contact with the workpiece, the outer peripheral side is made of cemented carbide and the inner peripheral side is made of cast iron. The cast iron part was molded integrally,
It has been proposed to use so-called composite rings. However, in a rolling roll using such a composite ring, a keyway to be fitted to a key provided on the outer periphery of the roll shaft can be formed in the cast iron portion on the inner peripheral side of the rolling ring, and the gap between the roll shaft and the roll shaft can be formed. It is possible to rotate the rolling ring integrally with the roll shaft without causing slight slippage, but on the other hand, stress acts between the roll shaft and the cemented carbide part on the inner peripheral side of the cast iron. In particular, since it is concentrated at the corners of the key groove, if an impact load acts on the rolling ring during rolling, cracks are generated from the corners of the key groove, and the life of the rolling ring is extended. The result is a significant reduction.

[0006] The present invention has been made in view of such circumstances, and even when an impact load is applied during rolling, it is possible to reliably prevent the occurrence of minute slippage on the rolling ring, and to achieve strictness. Along with providing a rolling roll capable of sufficiently satisfying the rolling conditions such that processing accuracy is required, particularly when the above-described composite ring is used as the rolling ring, cracks may occur in the rolling ring. An object of the present invention is to provide a rolling roll capable of preventing the occurrence of rolling.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve such an object, the present invention provides a method of forming an annular roll on the outer periphery of a cylindrical roll shaft rotated about an axis. A rolling roll in which a ring and a spacer are fitted in the axial direction, and a ring-shaped portion protruding toward the spacer is formed on a side of the rolling ring facing the spacer, and the ring-shaped portion is A large number of engaging concave portions that are concave in the axial direction are formed in the circumferential direction, and an engaging convex portion that meshes with these engaging concave portions and engages in the circumferential direction is formed on the spacer side. Therefore, according to the rolling roll having such a configuration, the rolling ring and the spacer are integrally formed in the circumferential direction by the engagement between the engaging concave portion formed in the annular portion of the rolling ring and the engaging convex portion on the spacer side. Therefore, the rolling ring can be reliably prevented from slipping even when an impact load acts.

In the case where a composite ring in which a cemented carbide part on the outer peripheral side and a cast iron part on the inner peripheral side are integrally formed is used as the rolling ring, the annular part convex toward the spacer side is used. Is formed on the cast iron portion, so that the stress between the cemented carbide portion and the roll shaft can be prevented from acting on the annular portion, and the engagement with the annular portion where the stress does not act on the annular portion can be avoided. Since the recess is formed, it is possible to prevent a crack from being generated from the engagement recess. Furthermore, if this engagement recess is formed so as to be recessed in a U-shape,
It is possible to prevent stress from being concentrated at the corners of the case where the cross section is formed in a U-shape like a general keyway, so that cracks can be more reliably prevented. Become. On the other hand, the engaging concave portion and the engaging convex portion may be formed into a waveform formed by a concave and convex curved surface capable of adhering to each other. In this case, both the engaging concave portion and the engaging convex portion may be formed. Since corners such as corners and corners are not formed, cracks can be more reliably prevented.

[0009]

FIG. 1 to FIG. 5 show an embodiment of the present invention. In these figures, reference numeral 1 denotes a roll shaft formed in a multi-stage cylindrical shape from a steel material or the like. The roll shaft 1 is rotatably supported at both ends by a rolling device (not shown) so as to rotate around a central axis O. Is rotated in a predetermined rotation direction. At the center of the roll shaft 1, there is formed a mounting portion 2 having a constant outer diameter, and at one end side (right side in FIG. 1) of the mounting portion 2, a flange portion 3 having a one-step diameter increase is provided. Further, the mounting portion 2 is provided with three annular spacers 4A to 4D like the four annular spacers 4A from the other end side (the left side in FIG. 1) of the roll shaft 1 toward the flange portion 3. Rolling ring 5
A to 5C are alternately fitted in the direction of the axis O with their side surfaces in contact with each other, and are pressed and fixed to the one end by a hydraulic nut 6 attached to the other end of the mounting portion 2. ing. A keyway 2a is formed on the outer periphery of the mounting portion 2 of the roll shaft 1 in parallel with the axis O.

On the outer periphery of each of the rolling rings 5A to 5C, two processed portions 7, 7 are formed in an annular shape around the axis O. Here, the workpiece to be rolled by the rolling roll of the present embodiment is a so-called deformed bar steel material in which nodes are formed on the outer periphery of a cylindrical shaft-shaped main body at regular intervals in the longitudinal direction thereof, In accordance with such a workpiece shape, in the present embodiment, the processing portion 7 includes a large number of small grooves extending along the semicircle on the bottom surface of the concave groove 7a having a substantially semicircular cross section including the axis O. 7b are formed at equal intervals in the circumferential direction around the axis O.

Of these rolling rings 5A to 5C, two rolling rings 5B and 5C arranged on the one end side are:
In the present embodiment, a configuration similar to that of the rolling ring described in Japanese Utility Model Laid-Open No. 6-48901 described above is employed, and is integrally formed in a ring shape from a hard material such as a cemented carbide. Of the side surfaces of the rolling rings 5B and 5C,
An inclined portion 8 is formed on a side surface facing the one end side and in contact with the spacers 4C, 4D adjacent to the one end side, and is inclined in a direction oblique to the central axis O. The inclined portion 8 is formed by a pair of flat surfaces which intersect the end portions of the annular rolling rings 5B and 5C at an obtuse angle with an intersecting ridge line extending in a direction orthogonal to the central axis O. In this embodiment, in particular, in the present embodiment, the intersecting ridge line extends from the keyway 2a formed in the mounting portion 2 of the roll shaft 1 along the axis O. It is configured to be arranged at a position rotated by 90 degrees around it.

The spacers 4A to 4D are made of a material having relatively high toughness, such as steel, and the spacers 4C and 4D disposed at one end of the rolling rings 5B and 5C respectively include the spacers 4A to 4D. On the side surface facing the other end side and abutting on the rolling rings 5B, 5C, there are formed inclined portions 9 each having a V-shaped notch which is concave on the one end side, opposite to the inclined portion 8. The included angle of the concave V-shape formed by the inclined portion 9 is made equal to the included angle of the convex V-shaped formed by the inclined portion 8, and the rolling rings 5B and 5C and the spacers 4C and 4D are mutually separated. Are attached to the mounting portion 2 of the roll shaft 1 so that the inclined portions 8 and 9 of the roll shaft 1 are brought into close contact with each other. The rolling rings 5B, 5C and the spacers 4C,
In the present embodiment, the side surface of the 4D where the inclined portions 8 and 9 are not formed and both side surfaces of the spacer 4A at the other end are formed as flat surfaces perpendicular to the central axis O in the present embodiment. Key grooves 4a are formed on the inner periphery of all the spacers 4A to 4D in parallel with the axis O so as to coincide with the positions of the key grooves 2a formed in the mounting portion 2 of the roll shaft 1. The keys 10 are buried in the key grooves 2a, and the key grooves 4a
... are fitted.

On the other hand, among the rolling rings 5A to 5C, the rolling ring 5A disposed at the other end and the spacer 4B disposed at one end thereof are related to the present invention. In this embodiment, as shown in FIGS. 2 and 3, the outer peripheral side is a cemented carbide part 11 and the inner peripheral side is a cast iron part 12, so that the cemented carbide part 11 and the cast iron part 12 It is a composite ring that is integrally formed, and the cemented carbide portion 11 on the outer peripheral side has rolling rings 5B and 5C.
A slightly larger processed portion 7 is formed in the same shape as that of FIG.
On the side surface of the rolling ring 5A facing the one end, an annular portion 13 is formed on the inner peripheral side of the cast iron portion 12 so as to protrude one step toward the one end. Are formed with a large number of engaging recesses 14 of the same shape and size that are recessed toward the other end side in the direction of the axis O at equal intervals in the circumferential direction.

Here, the annular portion 13 is of an annular shape centered on the axis O, and has an inner diameter of the rolling ring 5A.
Of the cast iron part 12
Is slightly smaller than the outer diameter of the cast iron portion 12 and is formed of cast iron integral with the cast iron portion 12. The engaging recess 14 has a pair of parallel wall surfaces 14a, 14a facing each other so as to form a U-shape as shown in FIG. Wall 14
a, 14a, and is defined by a semi-circular bottom surface 14b facing the one end side, and is formed so as to penetrate the annular portion 13 in the radial direction in this shape. Opposing inner wall surface 14 of recess 14
a and 14a are parallel to the axis O and parallel to each other, and are arranged so as to face in a direction substantially orthogonal to the rotation direction of the roll shaft 1. However, the depth to which the engagement recess 14 is recessed depends on whether the annular portion 13 is
A is slightly smaller than a protruding height protruding from the side surface of A to one end side. In addition, both side surfaces of the rolling ring 5A except for the annular portion 13 are formed as flat surfaces perpendicular to the axis O, and the intersection between the end surface of the annular portion 13 and the inner wall surfaces 14a, 14a of the engagement concave portion 14. The ridge is chamfered.

In the present embodiment, the spacer 4B adjacent to the one end of the rolling ring 5A constructed in this manner is provided on the inner periphery of the cylindrical spacer body 15 as shown in FIGS. The key groove 4a of the spacer 4B is formed by fitting a cylindrical engagement ring 16 one size smaller than
Is formed on the inner periphery of Here, the spacer body 15 and the engagement ring 16 are made of a material having high hardness, even though the spacer body 15 is made of the same steel material.
The engagement ring 16 is formed of a material having a lower hardness and a higher toughness, and the length of the engagement ring 16 in the direction of the axis O is slightly shorter than that of the spacer body 15 as shown in FIG. The outer diameter of the engagement ring 16 is slightly larger than the outer diameter of the annular portion 13 of the rolling ring 5A. Further, both side surfaces of the spacer main body 15 and side surfaces of the engagement ring 16 facing the one end side are flat surfaces perpendicular to the axis O.

On the side surface of the engagement ring 16 facing the other end, the same number of engagement projections 17 as the engagement recesses 14 engaging with the engagement recesses 14 of the rolling ring 5A are formed. They are formed at equal intervals in the direction. Here, in the present embodiment, each of the engaging projections 17 has a substantially rectangular shape that is flattened in the direction of the axis O when viewed from the radial direction with respect to the axis O, and is formed on the inner and outer circumferences of the engaging ring 16 with this shape. The side faces 17a, 17a extending over the circumference and extending in the circumferential direction are parallel to the axis O and parallel to each other, and the roll shaft 1
It is arranged so as to face a direction substantially orthogonal to the rotation direction of. The width between the side surfaces 17a, 17a is set to a size that allows the engagement projection 17 to be inserted into the engagement recess 14 in the direction of the axis O, and the projection height of the engagement projection 17 Is set to be equal to the depth of the wall surfaces 14a, 14a of the engagement recess 14. Further, a chamfer is formed at an intersection ridge line between the both side faces 17a, 17a and the end face of the engaging projection 17 facing the other end.

When the engagement ring 16 is inserted into the inner periphery of the spacer body 15 as described above, the side face of the engagement ring 16 facing the one end side is connected to the spacer body 4B. The rolling member 5B is brought into contact with the rolling ring 5B while keeping the side surface facing one end thereof in contact with the rolling ring 5B, and the side surface facing one end of the rolling ring 5A abuts on the side surface facing the other end of the spacer body 15. The engagement protrusion 17 at the other end of the engagement ring 16
And the engaging recesses 14 of the rolling ring 5A are engaged with each other, and the key 10 is fitted into the key groove 4a and attached to the attaching portion 2 of the roll shaft 1. Thus, in such a mounted state, the rolling ring 5A and the spacer 4
B means the wall surfaces 14a, 14a of the engagement recesses 14 ...
And the side faces 17 a, 1 of the engagement projection 17 of the engagement ring 16.
7a come into close contact with each other in the circumferential direction around the axis O, and the end face of the annular portion 13 facing one end and the end face of the engagement projection 17 facing the other end are formed with the engagement ring 16 and They are arranged so as to be slightly spaced in the direction of the axis O without contacting the rolling ring 5A.

In addition, among the spacers 4A to 4D mounted on the mounting portion 2, between the spacer 4D disposed at the one end side and the flange portion 3 of the roll shaft 1, in order from the spacer 4D side. An O-ring 18, a disc spring 19, and an O-ring 20 are interposed, and a split ring 21 is interposed between the hydraulic nut 6 and the spacer 4A disposed at the other end.
The hydraulic nut 6 is attached to the mounting portion 2 of the roll shaft 1.
The spacers 4A to 4D and the sleeves 5A to 5C are pressed toward the one end via the split ring 21 by a hydraulic mechanism (not shown). It has been made like that. Further, the spacer 4 has a flat surface perpendicular to the axis O.
O-rings 22 are attached to the side surfaces of A to 4C as appropriate.

In the rolling roll configured as described above, the rolling ring 5A is provided with the engaging recesses 14 recessed in the direction of the axis O formed on the annular portion 13 protruding from the one end side as described above. The engaging projections 17 of the spacer 4B adjacent to the one end side of the rolling ring 5A are engaged with each other in the circumferential direction so that the rolling ring 5A and the spacer 4B can be integrated in this circumferential direction. As a result, the rolling ring 5A can be firmly fixed to the mounting portion 2 of the roll shaft 1, so that even if an impact load acts on the rolling ring 5A during rolling, the rolling ring 5A slips. Can be reliably prevented. For this reason, according to the rolling roll having the above-described configuration, it is possible to sufficiently cope with strict rolling conditions in which minute slippage is not allowed in the rolling ring 5A, and it is possible to obtain high processing accuracy.

In the present embodiment, the rolling ring 5A is a composite ring in which the cemented carbide portion 11 on the outer peripheral side and the cast iron portion 12 on the inner peripheral side are integrally formed. Of these, the rolling ring 5
The engagement recesses 14 are formed in the annular portion 13 formed so as to protrude from the side surface of A. Accordingly, the annular portion 13 in which the engagement recesses 14 are formed has a hard metal portion on the outer peripheral side. No stress from 11 acts. For this reason, in the rolling ring 5A according to the present embodiment, when an impact load is generated during rolling, the cast iron portion 1A may be used.
2 can be prevented from occurring due to the stress acting on the engagement recesses 14..., And the life of the rolling ring 5 </ b> A is prevented from being shortened by the occurrence of such cracks. In addition, stable rolling can be promoted over a long period of time.

Further, in the rolling ring 5A of the present embodiment, the engaging concave portions 14 are formed by the engaging convex portions 17 of the spacer 4B.
It is formed so as to be U-shaped and recessed in the direction of the axis O from the end face of the annular portion 13 facing the side, and is bent at a small radius of curvature, for example, a key groove having a general cross-section “U” shape. Therefore, no crack is likely to be generated from the corner portion due to concentration of stress or the like due to engagement with the engaging projection 17 at such a corner portion. . For this reason, according to the present embodiment, in combination with the fact that the stress from the cemented carbide portion 11 does not act on the engagement recess 14 as described above, it is possible to more reliably prevent the rolling ring 5A from being damaged. Thus, the life of the rolling ring 5A can be further extended.

On the other hand, in the present embodiment, the spacer 4B adjacent to the one end of the rolling ring 5A is made of a spacer body 15 having high hardness on the outer peripheral side and the engaging protrusions 17.
Is formed on the inner peripheral side engagement ring 16 having high toughness. The spacer 4B and the rolling ring 5A are integrally rotatable in the circumferential direction by the engagement of the engagement recesses 14 and the engagement projections 17 while being engaged with the engagement recesses 14. The convex portions 17 are not engaged in the direction of the axis O, and the hard cemented carbide portion 11 on the outer peripheral side of the rolling ring 5A is pressed against the hard spacer body 15 by being pressed by the hydraulic nut 6. By being brought into contact, the rolling ring 5A and the spacer 4B are integrated in the direction of the axis O.

Therefore, according to the present embodiment, for example, the rolling ring 5A and the spacer 4B are united in the direction of the axis O by the engagement of the engaging concave portions 14 and the engaging convex portions 17 with each other. As compared with the case, a higher mounting rigidity can be given to the rolling ring 5A, and the forming accuracy in the direction of the axis O such as the depth of the engaging concave portion 14 and the projecting height of the engaging convex portion 17 can be relatively moderately adjusted. They can be set to facilitate their formation. In particular, if the engagement ring 16 is formed of a material having a lower hardness than the cast iron portion 12, the roll shaft 1, and the key 10 of the rolling ring 5A, the engagement ring 16 may bite into the processed portion 7 of the rolling ring 5A. Even if the rolling occurs, it is possible to limit the damage in the rolling roll to only the engagement ring 16, and by replacing the engagement ring 16, it is possible to obtain an advantage that the rolling can be restarted with less labor.

In this embodiment, however, the spacer 4B is divided by the outer spacer body 15 and the inner engaging ring 16 as described above, but these are integrally formed. No problem. In the present embodiment, the annular portion 13 is provided on the side surface of the one end side of the rolling ring 5A.
Are formed to form the engaging recesses 14 and the spacers 4B adjacent to one end thereof are formed with the engaging projections 17. However, the annular portion 13 is also projected to the other end of the rolling ring 5A. The engaging concave portions 14 may be formed, and the engaging convex portions 17 may be formed in the spacer 4A adjacent to the other end. Further, other rolling rings 5B and 5C other than the rolling ring 5A and the spacers 4B to 4D adjacent thereto may have the same configuration as the rolling ring 5A and the spacer 4B.

FIGS. 6 and 7 show a rolling ring 31 and an engaging ring 32 according to another embodiment of the present invention, respectively, which are common to the embodiments shown in FIGS. The same reference numerals are assigned to the portions and the description is omitted. That is, also in the present embodiment, the rolling ring 3
1 is a cemented carbide part 11 on the outer peripheral side and a cast iron part 1 on the inner peripheral side.
2 is a composite ring that is integrally formed, and processed portions 7 are formed on the outer periphery of the cemented carbide portion 11, while one step protrudes from a side surface of the cast iron portion 12 facing one end in the direction of the axis O. An annular portion 13 is formed in the annular portion 13, and a large number of engagement recesses 33 of the same shape and the same size recessed at the other end side in the axis O direction are formed at equal intervals in the circumferential direction. Here, this engagement recess 3
.., A convex curved surface portion 33a which forms a convex arc shape as seen in the radial direction with respect to the axis O as shown in FIG.
A concave curved surface portion 33b smoothly connected to 3a and having a concave arc shape having a radius of curvature equal to the convex arc has a waveform shape that is alternately and continuously continuous with the same width in the circumferential direction.

On the other hand, a key groove 4a is formed on the inner periphery of the engagement ring 32, and engagement projections 34 are formed on a side surface facing the other end in the direction of the axis O. Like the engaging concave portion 33, the engaging convex portions 34 have a convex curved surface portion 34a which is formed in a convex arc shape as viewed in the radial direction with respect to the axis O as shown in FIG. And a concave curved surface portion 34b having a concave arc shape having a curvature radius equal to the convex circular arc and having a width which is alternately continuous with the same width in the circumferential direction. The curvature radius of the concavo-convex arc formed is equal to the curvature radius of the concavo-convex arc formed by the concavo-convex curved surface portions 33a and 33b of the engagement recess 33, so that the engagement recess 33 and the engagement protrusion 34 These uneven curved surface portions 33
a, 33b and the concave / convex curved surface portions 34a, 34b are alternately meshed with each other so as to be brought into close contact with each other, and can be engaged in the circumferential direction.

However, in the rolling roll in which the rolling ring 31 and the spacer provided with the engaging ring 32 thus configured are fitted and mounted on the roll shaft, the engaging concave portions 33 and the engaging convex portions 34 are also provided. … Can prevent the rolling ring 31 from causing slight slippage, and can obtain high machining accuracy.
Is a composite roll in which the cemented carbide portion 11 and the cast iron portion 12 are integrally formed as described above, but by providing the cast iron portion 12 with the annular portion 13 in which the engagement concave portion 33 is formed, cracks are generated. Can be prevented. In addition, the engaging concave portion 33 and the engaging convex portion 34 in the present embodiment are provided with the concave and convex curved surface portions 33a, 33b,
In the embodiment shown in FIGS. 1 to 5, the corrugations formed by the corrugations 34a and 34b are so-called serrations. No corners, such as corners, that are bent with a small radius of curvature are formed, and cracks and chips are more reliably prevented from occurring not only on the rolling ring 31 but also on the engaging ring 32 side. It becomes possible.

[0028]

As described above, according to the present invention,
The annular recess formed so as to protrude from the side surface of the rolling ring has an engaging recess recessed in the axial direction of the roll shaft, and the spacer adjacent to the rolling ring has an engaging projection formed thereon. By engaging with, it is possible to reliably prevent the rolling ring from slipping even when an impact load is applied during rolling, and even under severe rolling conditions where minute slippage is not allowed. It is possible to obtain high processing accuracy in a sufficient manner. In particular, when using a composite roll in which a cemented carbide part on the outer peripheral side and a cast iron part on the inner peripheral side are integrally formed as a rolling ring, by forming the annular part on the cast iron part, It is possible to prevent the stress from the hard alloy portion from acting on the engagement concave portion to easily cause cracks, thereby prolonging the life of the rolling ring and promoting stable rolling.

[Brief description of the drawings]

FIG. 1 is a partially broken side view showing one embodiment of the present invention.

FIG. 2 shows a rolling ring 5A in the embodiment shown in FIG.
FIG.

FIG. 3 is a front view of an annular portion 13 of the rolling ring 5A shown in FIG.

4 is a sectional view of an engagement ring 16 of a spacer 4B in the embodiment shown in FIG.

FIG. 5 is a front view as viewed in the direction of the arrow Y in FIG. 4;

FIG. 6 shows a rolling ring 3 according to another embodiment of the present invention.
1 is a sectional view of FIG.

FIG. 7 shows an engagement ring 3 according to another embodiment of the present invention.
2 is a sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll shaft 2 Mounting part 4A, 4B, 4C, 4D Spacer 5A, 5B, 5C, 31 Rolling ring 6 Hydraulic nut 7 Working part 10 Key 11 Cemented carbide part 12 Cast iron part 13 Annular part 14, 33 Engaging recess 15 Spacer Main body 16, 32 Engagement ring 17, 34 Engagement convex portion O Axis line of roll shaft 1

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Noriyuki Kakehashi, Inventor 1528 Nakashinda, Yokoi, Kobe-cho, Anpachi-gun, Gifu Prefecture F-term in Mitsubishi Materials Corporation Gifu Works (reference) 4E016 AA02 AA04 AA05 DA03 DA04 DA06 DA14 DA15 FA06 FA07

Claims (4)

[Claims] 1. A rolling roll in which an annular rolling ring and a spacer are fitted in the axial direction around an outer periphery of a cylindrical roll shaft rotated around an axis, wherein the spacer of the rolling ring is provided. An annular portion protruding toward the spacer side is formed on the side surface facing the side, and a large number of engaging concave portions that are recessed in the axial direction are formed in the annular portion in the circumferential direction, and on the spacer side, And a rolling roll formed with engaging projections which engage with these engaging recesses and engage in the circumferential direction. 2. The rolling ring is a composite ring in which a cemented carbide part on an outer peripheral side and a cast iron part on an inner peripheral side are integrally formed, and the annular part is formed on the cast iron part. The rolling roll according to claim 1, wherein: 3. The engagement recess according to claim 1, wherein the engagement recess is formed so as to be recessed in a U-shape.
The rolling roll according to 1. 4. The rolling roll according to claim 1, wherein the engaging concave portion and the engaging convex portion are formed in a corrugated shape having concave and convex curved surfaces that can be in close contact with each other.