JP3241016B2 - Rolling 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 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 sleeve which comes into contact with a workpiece is formed from a hard material such as a cemented carbide, and this sleeve and an annular spacer are inserted into a roll shaft to form the roll. Conventionally, a sleeve is fixed to a roll shaft by pressing in the direction of the center axis of the shaft or by pressing the inner peripheral surface of the sleeve against the outer periphery of the roll shaft. However, since all such rolling rolls fix the sleeve to the roll shaft only by frictional force due to pressing, when the load due to contact with the workpiece exceeds the above-mentioned frictional force, the sleeve and the spacer or the roll shaft are not fixed. During the rolling, slip may occur in the circumferential direction, which may hinder stable rolling.

Therefore, 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 sleeve is not allowed, the sleeve and the spacer are inserted into a roll shaft and the center is inserted. When pressing in the axial direction, a V-shaped or inclined portion is formed on the contact surface between the sleeve and the spacer that contact each other.
For example, it is proposed in Japanese Utility Model Laid-Open No. 6-48901. However, in such a rolling roll, since the sleeve and the spacer are circumferentially engaged by the inclined portion, the sleeve can be stably fixed to the roll shaft by suppressing the sliding in the circumferential direction.

[0004]

However, even in a roll having such an inclined portion, if a larger load acts on the sleeve in a rolling manner during the rolling process, the sleeve and the spacer may be separated from each other. It has been inevitable that the slippage occurs along the above-mentioned inclined portion, thereby causing a slight slip between the sleeve, 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] The present invention has been made under such a background, and requires strict processing precision to reliably prevent the occurrence of minute slippage even when an impact load is applied to the sleeve. It is an object of the present invention to provide a rolling roll capable of sufficiently satisfying such rolling conditions.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve such an object, the present invention provides an annular sleeve and a spacer which are brought into contact with each other in the direction of the center axis thereof so as to contact the roll shaft. In the roll inserted into the roll, a fitting portion formed by a key extending in a radial direction with respect to the center axis is formed on a contact surface where the sleeve and the spacer come into contact with each other. Therefore, according to such a rolling roll, the sleeve and the spacer are key-fitted in the circumferential direction by the fitting portion extending in the radial direction with respect to the center axis, and the sleeve is firmly fixed to the roll shaft. It is possible to reliably prevent the sleeve from slipping even when an excessive load acts.

[0007] Here, the contact surface between the sleeve and the spacer, the Rukoto to form a V-shaped or oblique inclined portion extending oblique direction with respect to the center axis, the steady acting during rolling The conventional load is received by the engagement of the inclined portion as in the past, and the slippage is suppressed by the above-described fitting portion only when the workpiece is loaded into the roll or when a large load is suddenly applied. Therefore, it is possible to prevent stress from being constantly concentrated on the fitting portion by the key, and it is possible to prevent cracks and the like from occurring particularly when the sleeve is made of a hard material such as a cemented carbide. Also,
By forming the fitting portion on the top portion where the contact surface of the sleeve protrudes toward the spacer by the inclined portion, a sufficient thickness is secured before and after the fitting portion on the sleeve side in the circumferential direction. It is possible to more reliably prevent the occurrence of cracks and the like due to concentration of stress.

[0008]

FIG. 1 and FIG. 2 show a first embodiment of the present invention. In these figures, reference numeral 1
Is a roll shaft formed in a multi-stage cylindrical shape from steel or the like. The roll shaft 1 is rotatably supported at both ends by a rolling device (not shown) and is rotated around a central axis O. 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. The mounting portion 2 is further provided with four annular spacers 4 and three annular sleeves 5 from the other end (the left side in FIG. 1) of the roll shaft 1 toward the flange portion 3. 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.

Here, the sleeve 5 is formed of a hard material such as cemented carbide, ceramics, cermet, HIP high-speed steel or the like, and its outer periphery is machined according to the shape of the workpiece to be rolled. (In the present embodiment,
A diamond-shaped processed portion 7 having a substantially triangular mountain shape in a cross section including the axis O is formed, and a contact surface 8 facing the one end side of each sleeve 5 and abutting on the spacer 4 adjacent to the one end side is formed. And an inclined portion 9 inclined in a direction oblique to the center axis O. This inclined part 9
In the present embodiment, a cylindrical portion formed on the side surface facing the one end side of the sleeve 5 so as to protrude toward the one end side has an obtuse angle with a crossed ridge line extending in a direction orthogonal to the central axis O. Is cut out so as to form a V-shape that is convex on one end side by a pair of planes that intersect with each other. The key groove 10 is formed so as to extend in the radial direction with respect to the axis O.

On the other hand, the spacer 4 is formed of a material having higher toughness than the sleeve 5 such as a steel material, and a contact surface 11 that faces the sleeve 5 toward the other end thereof has the inclined portion 9. Contrary to this, an inclined portion 12 having a concave V-shape which is concave at one end side is formed, and the included angle of the concave V-shaped formed by the inclined portion 12 is a convex angle formed by the inclined portion 9. A key groove 13 having the same U-shaped cross section and a width equal to the key groove 10 is provided at the bottom of the V-shaped concave valley. It is formed so as to extend. Each of the sleeves 5 and the spacer 4 adjacent to the one end thereof are brought into close contact with the inclined surfaces 9 and 12 so that the contact surfaces 8 and 11 are in contact with each other. The key member 14 is fitted into the key grooves 10 and 13 matched with the key shaft 10 and is mounted on the mounting portion 2 of the roll shaft 1.
Further, the contact surface 15 facing the other end of the sleeve 5 and the contact surface 16 contacting the contact surface 15 facing one end of the spacer 4 adjacent to the other end of each sleeve 5 In the present embodiment, it is formed in a plane perpendicular to the central axis O.

[0011] Of the spacers 4 and the sleeves 5 alternately mounted on the mounting portion 2, between the spacer 4 disposed at the one end and the flange portion 3 of the roll shaft 1, While an O-ring 17, a disc spring 18, and a receiving spacer 19 for the disc spring 18 are interposed in order from the spacer 4 side,
Among the spacers 4 and the sleeves 5, a split ring 20 is interposed between the spacer 4 disposed at the other end and the hydraulic nut 6. The hydraulic nut 6 is screwed and mounted on a male screw portion 21 formed on the other end side of the roll shaft 1 with respect to the mounting portion 2. The hydraulic nut 6 is connected via the split ring 20 by a hydraulic mechanism (not shown). The spacers 4 and the sleeves 5 are pressed against the one end.

However, in the rolling roll configured as described above, the key groove 10 formed on the contact surface 8 of the sleeve 5 and the contact surface 11 of the spacer 4 contacting the contact surface 8 are formed. The key member 14 is interposed in the key groove 13 in the radial direction with respect to the center axis O, thereby forming a fitting portion in the present embodiment, whereby the sleeve 5 and the spacer 4 are separated from each other. It is fitted and integrated in the circumferential direction, and is firmly fixed to the roll shaft 1. Therefore, according to the rolling roll having the above configuration, even if an impact load acts on the sleeve 5 during rolling,
It is possible to reliably prevent slippage from occurring between the spacer 4 and the sleeve 5, and to sufficiently cope with severe rolling conditions where minute slippage is not allowed, and to obtain high processing accuracy. Becomes

In this embodiment, the contact surface 8 of the sleeve 5 and the contact surface 11 of the spacer 4 have a V-shaped inclination extending in a direction oblique to the center axis O of the roll shaft 1. Portions 9 and 12 are formed, and these inclined portions 9 and 12 are formed.
The contact surfaces 8 and 11 are brought into contact with each other in a state where they are in close contact with each other, whereby the spacer 4 and the sleeve 5 are circumferentially engaged with each other to be integrated. For this reason,
According to the rolling roll of the present embodiment, the inclined portion 9,
12 to prevent slippage with the spacer 4 and to prevent the sleeve 5 from being suddenly applied to the roll 5 by an impact load caused by biting when the work is loaded into the rolling roll or by other circumstances. When a large load is applied, this can be received by the fitting portion of the key member 14, and the stress due to the steady load is always applied to the key grooves 10 and 10 via the key member 14.
13 can be avoided. this is,
This is particularly effective when the sleeve 5 is formed of a hard material such as a cemented carbide having a low toughness as in the present embodiment, and cracks or the like easily occur from the keyway 10 due to steady concentration of stress.

Moreover, in the present embodiment, the key groove 10 of the sleeve 5 is formed on the top of the abutting surface 8 projecting toward the spacer 4 by the inclined portion 9 having a V-shape. . Therefore, before and after the key groove 10 in the circumferential direction, a cylindrical portion protruding from the side surface facing the one end side of the sleeve 5 is left as a surplus portion, so that a sufficient thickness is secured. According to the embodiment, the key member 14
Can be held stably, and the above-mentioned effect of more reliably preventing cracking due to stress concentration can be obtained.

In this embodiment, the inclined portion 9 is
By forming a pair of planes having an intersecting ridge line extending in a direction perpendicular to the central axis O and intersecting at an obtuse angle, the cylindrical portion is cut out and formed so as to form a V-shape convex to the one end side. However, for example, this cylindrical portion is formed so as to be simply cut off obliquely by one plane oblique to the axis O,
A keyway 10 is formed on the top projecting from the one end,
A fitting portion with the key member 14 may be formed. Further, in the present embodiment, the key member 14 is fitted into the key grooves 10 and 13 to form a fitting portion, but the key is provided on the contact surface 8 side of the sleeve 5 and the contact surface 11 side of the spacer 4. It may be formed integrally to form the fitting portion. further,
In this embodiment, the contact surface 1 facing the other end of the sleeve 5
5 and the contact surface 16 facing the one end side of the sleeve 5 are formed in a flat shape perpendicular to the central axis O. However, these contact surfaces 15 and 16 also have the fitting portions as described above. Alternatively, an inclined portion may be formed.

On the other hand, in the first embodiment, the inclined portions 9 and 12 are formed on the contact surface 8 of the sleeve 5 and the contact surface 11 of the spacer 4 as described above. As in the second embodiment of the present invention shown in FIGS.
The two contact surfaces 8, 11 are formed so as to be perpendicular to the central axis O of the roll shaft 1 without forming the inclined portions 9, 12, and the central axes are formed on the contact surfaces 8, 11 as described above. O
May be formed so as to extend in the radial direction. However, in the second embodiment shown in FIGS. 3 and 4, parts common to those in the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.

That is, in the second embodiment, the contact surfaces 8, 15 of the sleeve 5 and the contact surfaces 11, 16 of the spacer 4 are parallel to each other so as to be perpendicular to the central axis O. The sleeve 5
Key grooves 10 and 13 are formed on the contact surface 8 of the spacer 4 and the contact surface 11 of the spacer 4 opposed thereto.
The key member 14 is interposed in 3 to constitute the fitting portion. In the second embodiment, a nut 31 is screwed on one end side (right side in FIG. 1) of the mounting portion 2 of the roll shaft 1 instead of forming the flange portion 3 of the first embodiment. A disc spring 32 is interposed between the nut 31 and the spacer 4 disposed at the one end.

However, in the rolling roll of the second embodiment configured as described above, the key grooves 10 and 13 are also provided.
The sleeve 5 and the spacer 4 are circumferentially fitted and integrated by a fitting portion constituted by the key member 14 and the key member 14, so that the sleeve 5 is firmly fixed to the roll shaft 1 via the spacer 4. Thus, even if an impact load is applied during rolling, it is possible to prevent the sleeve 5 from slipping and to obtain high processing accuracy. Further, according to the second embodiment, although the effect of avoiding the concentration of stress on the key groove as in the inclined portions 9 and 12 of the first embodiment cannot be expected, the inclined portions 9 and 12 can be formed with high precision. Thus, it is not necessary to form the spacers 4 and the sleeve 5 so that they can be in close contact with each other.

[0019]

As described above, according to the present invention,
The sleeve and the spacer are fitted in the circumferential direction and integrated by a fitting portion formed by a key formed on the contact surface between the sleeve and the spacer so as to extend in the radial direction with respect to the center axis of the roll shaft, Because it is firmly fixed to the roll shaft, it can reliably prevent slippage from occurring between the spacer and the spacer even when an impact load is applied to the sleeve during rolling, and allows slight slippage. It is possible to obtain high working accuracy by sufficiently coping with severe rolling conditions that are not performed.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a first embodiment of the present invention.

FIG. 2 is an enlarged side view around a sleeve 5 of the embodiment shown in FIG.

FIG. 3 is a partially cutaway side view showing a second embodiment of the present invention.

FIG. 4 is an enlarged side view around a sleeve 5 of the embodiment shown in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll shaft 2 Mounting part 4 Spacer 5 Sleeve 6 Hydraulic nut 8,11 Contact surface 9,12 Inclined part 10,13 Key groove (fitting part) 14 Key member (key) O Central axis of roll shaft 1

────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Takuma Arimura Kobe-cho, Anpachi-gun, Gifu Prefecture 1528 Nakashinda, Yokoi, Mitsubishi Materials Corporation Gifu Works (56) References JP-A-7-256314 (JP) JP-A-62-275512 (JP, A) JP-A-10-146605 (JP, A) JP-A-49-93264 (JP, A) JP-A-63-268505 (JP, A) JP-A-60-24209 (JP, A) JP-A-60-54211 (JP, A) JP-A-60-34304 (JP, U) JP-A-54-2732 (JP, U) JP-A-60-34305 (JP, A) U) Japanese Utility Model Hei 6-48901 (JP, U) Japanese Utility Model No. 48-9632 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 27/03 520 B21B 27/03 510

Claims (1)

(57) [Claims] In a rolling roll in which an annular sleeve and a spacer are brought into contact with each other in the direction of the center axis thereof and inserted into a roll shaft, a contact surface where the sleeve and the spacer come into contact with each other is provided with: A fitting portion is formed by a key extending in a radial direction with respect to the center axis , and
The contact surface extends in a direction oblique to the center axis
An inclined portion is formed, and the fitting portion is formed by the inclined portion.
The contact surface of the sleeve protrudes toward the spacer
A rolling roll formed on a part .