JPH1024303A - Roll and assembling method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fasilitate assembly and, furthermore, to enable securing sure and stable fixing strength after assembly at that. SOLUTION: A collar part 14 is integrally formed on the outer periphery of a shaft 12 and also a male thread 16 is formed on the outer periphery of the shaft where is separated by a necessary length from the collar part 14 in the axial direction. A ring 18 is fit to the shaft 12 through a through hole 18a which is pierced in the middle part. One side face of the ring 18 is abutted on the side face of the collar part 14. A nut 20 is screwed on the male thread 16 on the opposite side to the collar part 14 across the ring 18 and, by tightening the nut 20 toward the collar part 14, the ring 18 is in press-contact with the collar part 14. An adhesive 22 is applied between the inner peripheral surface of the ring 18 and the outer peripheral surface of the shaft, and between the collar part 14 and one side face of the ring 18 and the ring 18 is bonded to the shaft 12 by the adhesive power of the adhesive 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll and a method for assembling the roll, and more particularly, to a wear-resistant high-speed tool steel (high-speed steel) or cemented carbide alloy fitted to the outer periphery of a shaft. And a method for assembling the same, wherein the ring is fixed to the shaft using an adhesive.

[0002]

2. Description of the Related Art In order to increase the rolling speed and extend the life of a roll, it is desired that a roll surface of a roll used for hot rolling of a wire or a bar be formed of a hard material. I have. As a hard roll material, for example, high-speed steel is excellent, but since this high-speed steel is expensive and brittle, it is disadvantageous in strength and economical to integrally form the entire roll with high-speed steel. In view of this, a rolling roll has been proposed that has a configuration that is advantageous in terms of strength and economy by fitting and fixing a Heiss ring to the outer periphery of the shaft.

[0003] As a method of fitting and fixing a high-speed steel ring to the shaft, a high-speed steel ring is fitted and fixed to the outer periphery of the shaft by shrink-fitting, or by using mechanical means such as a wedge and a lock nut. It is known to fix.

[0004]

In the shrink-fit type fixing method, the strength after fixing is unstable due to dimensional errors between the shaft and the ring, and a desired fixing strength may not be obtained. On the other hand, in a fixing method using mechanical means such as a wedge and a lock nut, a desired fixing strength can be obtained by the tightening force of the lock nut. However, a drawback is that a large force is required for the assembling work for pushing the wedge or tightening the lock nut, resulting in poor workability. Also, in the shrink-fit type fixing method, it is necessary to heat the ring at the time of assembling, so that the number of assembling steps is increased and the cost is increased.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks inherent in the prior art, and has been proposed in order to solve the problem in a favorable manner, and secures a reliable and stable fixing strength after assembly. It is another object of the present invention to provide a roll and an assembling method thereof that are easy to assemble.

[0006]

[Means for solving the problems] To overcome the above-mentioned problems,
In order to suitably achieve the intended purpose, the roll according to the present invention is characterized in that a shaft and a wear-resistant ring fitted on the outer periphery of the shaft are bonded via an adhesive. .

[0007] In order to solve the above-mentioned problems and appropriately achieve the intended object, a method for assembling a roll according to the present invention comprises applying an adhesive to at least one of a shaft and a ring having wear resistance. The ring is assembled on the outer periphery of the shaft in a state where the surface coated with the adhesive is in contact with the surface of the shaft so that the contact portion between the two is adhered by the adhesive force of the adhesive.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a roll according to the present invention and a method for assembling the same will be described below with reference to the accompanying drawings.

[0009]

First Embodiment FIG. 1 shows a roll according to a first embodiment of the present invention, which is partially longitudinally cut, and extends radially around the outer periphery of a shaft 12 of the roll 10. A flange portion 14 is formed integrally, and an external thread 16 is provided on the outer periphery of the shaft which is axially separated from the flange portion 14 by a required length.
Are formed. A through hole 18a through which the shaft 12 can be inserted is formed in the center of the shaft 12, and a U-shaped cross section 18b is formed on the outer peripheral surface thereof. A ring 18 made of speed tool steel) is fitted through a through hole 18a. One side of the ring 18 is in contact with the side of the flange 14.
Note that the flange portion 14 functions as a positioning member for positioning the ring 18, and is not integrally formed with the shaft 12, but may be replaced with a screwed nut. The caliber 18b formed on the ring 18 is arbitrarily set in accordance with the product shape to be rolled, such as a concave shape, a convex shape, a flat shape, and the like. Further, as a material of the ring 18 fitted and fixed to the shaft 12, besides HSS, a cemented carbide, a die steel, or a cermet obtained by mixing a ceramic material and a metal material can be appropriately used. Examples of the method of manufacturing the ring 18 include casting, forging, and powder metallurgy.

The ring 18 fitted to the shaft 12
A nut 2 having an external thread 16 formed on the outer periphery of the shaft opposite to the flange 14 with the female thread 20a formed on the inner peripheral surface.
0 is screwed, and the ring 18 is pressed against the flange 14 via the nut 20 at a required pressure by tightening the nut 20 toward the flange 14. Further, between the inner peripheral surface of the ring 18 and the outer peripheral surface of the shaft 12,
An adhesive 22 is applied between the ring 18 and one side of the ring 18, and the ring 18 is bonded and fixed to the shaft 12 by the adhesive force of the adhesive 22.

As the adhesive 22, an anaerobic adhesive containing methacrylic acid ester as a main component is preferably used. For example, Loctite 14 of Japan Loctite Co., Ltd.
486 or the like can be used. The adhesive 22 is
At least up to 100 ° C, there is no sharp decrease in adhesive strength,
It is also recommended to use one that has the property of little deterioration due to long-term use. Further, those capable of securing a shear strength of preferably 50 kgf / cm ² or more are preferable.

[0012]

Next, the operation of assembling the roll according to the first embodiment will be described. Male screw 1 of outer circumference of the shaft 12 and flange 14
The ring 18 is fitted in such a manner that one side of the ring 18 is in contact with the side of the flange portion 14 on which the adhesive 22 is applied, with the adhesive 22 being applied to the side facing the 6. Then, a nut 20 is screwed into the male screw 16 of the shaft 12, and the ring 18 is pressed into contact with the flange portion 14 at a required pressure via the nut 20. That is, the ring 18 includes the nut 20 and the flange 14
, And is securely fixed to the outer periphery of the shaft 12 by the adhesive force of the adhesive 22.

[0013] The adhesive 22 is applied to the nut 20 and the male screw 1.
The nut 20 may be prevented from being slackened by being applied between the nut 6 and the adhesive 16 and 20. Further, the adhesive 22 may be applied only to the outer periphery of the shaft 12. Further, the ring 18 is connected to the shaft 1
By shrink-fitting the ring 2, the ring 18 can be more firmly fixed to the shaft 12. In addition, ring 1
When shrink-fitting the nut 8, the nut 20 and the flange 14 can be omitted.

When removing the ring 18 from the shaft 12, with the nut 20 removed from the shaft 12,
Adhesive 22 for bonding ring 18 and shaft 12
To reduce its adhesion. In this state, the ring 18 is removed from the shaft 12 by forcibly moving the ring 18 in the axial direction.

[0015]

[Experimental example] Outer diameter 320mm, inner diameter 215mm,
A 120 mm long HSS ring is fitted and fixed to the shaft by the conventional shrink fitting method, or when it is fitted and fixed to the shaft using only adhesive, or when it is fitted and fixed to the shaft by shrink fitting + adhesive An experiment in comparison with the above-described case will be described. The roll of No. was shrink-fitted with a shaft made of HSS heated in an oil bath at 150 ° C. at 4 / 10,000 (shaft diameter ratio). The roll was fitted with a ring fitted on a shaft coated with an anaerobic adhesive on the outer periphery. The roll of No. was shrink-fitted at 4 / 10,000 (shuff diameter ratio) to a shaft made of HSS heated in an oil bath at 150 ° C. on a shaft coated with an anaerobic adhesive on the outer periphery.

In each of the rolls, the rollable torque was measured from the slip (idling) of the ring and the rolling torque when the material to be rolled was actually rolled. As a result, the rollable torque of the roll was 2000 kg · m. The rollable torque of the roll was 1700 kg · m, and the rollable torque of the roll was 3800 kg · m. That is, even when only the adhesive is used, the rollable torque substantially equal to that of the conventional shrink fitting method is obtained, and the rollable torque is greatly improved by using the shrink fitting and the adhesive together. There was found.

From the experimental results, it is possible to assemble the roll 10 having a rollable torque substantially equal to that of the conventional shrink-fitting system by a simple operation of applying the adhesive 22, thereby improving workability. In addition, the cost can be reduced.

[0018]

FIG. 2 shows a roll according to a second embodiment, in which a ring 18 of the shaft 12 is provided.
A taper is formed on the outer peripheral surface to which is fitted to reduce the diameter from the flange portion 14 toward the male screw 16. The shaft 12 has a tapered portion 12a at the center thereof.
tapered through hole 18 having a taper corresponding to the taper of a
The ring 18 having the hole c is fitted through the through hole 18c. The ring 18 has one side surface facing the tapered through hole 18c and the flange portion 14 bonded to the shaft 12 and the flange portion 14 with an adhesive 22, respectively.

Further, a nut 20 is screwed into a male screw 16 formed on the shaft 12, and the nut 20 is
The ring 18 is pressed against the tapered portion 12a and the flange portion 14 of the shaft 12 by wedge action. That is, in the roller 10 according to the second embodiment, the ring 18 is securely fixed to the shaft 12 by the wedge action of the tapered portion 12a and the tapered through hole 18c and the adhesive force of the adhesive 22.

[0020]

Next, the operation of assembling the roll according to the second embodiment constructed as described above will be described. With the adhesive 22 applied to one side surface of the tapered portion 12a and the flange portion 14 of the shaft 12, the ring 18 is connected to the shaft 1 through the tapered through hole 18c.
2 is fitted to the second tapered portion 12a. Further, the ring 18 is attached to the flange 14 by an appropriate means (for example, pressing means using hydraulic pressure).
Of the ring 18 by the wedge action of the tapered through hole 18c and the tapered portion 12a.
Press against In this state, the male screw 1 of the shaft 12
A nut 20 is screwed into 6 and the nut 20 is pressed against the ring 18 to restrict the movement. Thus, the ring 18 is securely fixed to the shaft 12 by the wedge action and the adhesive force of the adhesive 22. In the second embodiment, the nut 20
It is recommended that the adhesive be fixed to the male screw 16 of the shaft 12 with an adhesive 22.

[0021]

FIG. 3 shows a roll according to a third embodiment, in which a sleeve 24 having a through hole 24a through which the shaft 12 can be inserted is formed at the center thereof.
Through the shaft 12. The outer peripheral surface of the shaft 12 of the sleeve 24 is formed with a taper whose diameter decreases from an end separated from the flange 14 to an end closer to the flange 14. A ring 18 having a tapered through hole 18c having a taper corresponding to the taper of the sleeve 24 at the center thereof is fitted into the sleeve 24 through the through hole 18c. The ring 18 fitted to the sleeve 24 has one side surface in contact with the flange 14 of the shaft 12.

A nut 20 is screwed into the male screw 16 formed on the shaft 12, and the nut 20 is tightened toward the flange portion 14, so that the ring 18 is fixed to the shaft 12 by the wedge action of the sleeve 24. The sleeve 24 is bonded and fixed by an adhesive 22 applied between the inner peripheral surface and the outer peripheral surface of the shaft 12. Further, an adhesive 22 is applied between the inner peripheral surface of the ring 18 and the outer peripheral surface of the sleeve 24 and between the flange portion 14 and one side surface of the ring 18. 14 is adhered and fixed by the adhesive force of the adhesive 22.

[0023]

Next, the operation of assembling the roll according to the third embodiment will be described. A sleeve 24 in which the inner peripheral surface and the outer peripheral surface are coated with an adhesive 22, respectively, in a state where the ring 18 is externally inserted through the tapered through hole 18c around the outer periphery of the shaft 12
Is inserted between the shaft 12 and the ring 18 by an appropriate pressing means. As a result, the ring 18 is
4 is pressed against the flange 14 by the wedge action. In this state, a nut 20 is screwed into the male screw 16 of the shaft 12, and the nut 20 is pressed against the sleeve 24 to regulate the movement thereof. Fixed securely. The ring 18 is also adhered to the flange 14 via an adhesive 22. Also in the third embodiment, the nut 20 is
2, it is recommended that the adhesive be fixed to the external thread 16 of the shaft 12.

[0024]

FIG. 4 shows a roll according to a fourth embodiment. A spacer 26 and a shrink ring 28 are provided on both sides of a ring 18 fitted on the shaft 12 in the axial direction. Is fitted outside. One side surface of the spacer 26 and the contraction ring 28 facing the ring 18 is formed with a taper that separates from the other side surface in a radially outward direction. The spacers 26 and the tapered surfaces 26 of the shrink ring 28 are provided on both side surfaces of the ring 18.
a and tapered surfaces 18d, 18d having a taper corresponding to the tapered surface 28a are formed. Then, the contraction ring 28 is pressed against the ring 18 by the nut 20 so that the tapered surfaces 28 a and 18 d and the tapered surfaces 18
The ring 18 is configured to be pressed inward in the axial and radial directions by the wedge action of d and 26a.
The shrink ring 28 is fitted around the shaft 12 in a heated state, and the ring 28 cools and contracts to further provide a wedge action.

The side surface of the flange portion 14 and the spacer 26 are adhered by an adhesive 22, and the spacer 26 and the side surface of the ring 18 are adhered by the adhesive 22. Further, the inner peripheral surface of the ring 18 is bonded to the outer peripheral surface of the shaft 12 with an adhesive 22. That is, the ring 18 is securely fixed by the wedge action of the spacer 26 and the contraction ring 28 and the adhesive force of the adhesive 22.

[0026]

Next, the operation of assembling the roll according to the fourth embodiment constructed as described above will be described. First, the spacer 26 is externally fitted to the shaft 12 so that the flat surface of the spacer 14 contacts the flange 14 with the adhesive 22 applied to one side surface. The adhesive 22 is applied to the tapered surface 26 a of the spacer 26, and the ring 18 is fitted to the shaft 12 so that the one tapered surface 18 a
d is in contact with the tapered surface 26a of the spacer 26a. An adhesive 22 is applied to the outer periphery of the shaft 12 at a position where the ring 18 is fitted, and the shaft 12 and the ring 18 are bonded to each other by the adhesive 22.

Next, with the shrink ring 28 heated and expanded in the radial direction, the tapered surface 28a
8 is fitted to the shaft 12 so as to contact the tapered surface 18d. The nut 20 is connected to the male screw 1 of the shaft 12.
6, the compression ring 28 is pressed against the ring 18. Thereafter, the ring 18 is pressed against the flange 14 via the spacer 26 by the force of cooling the shrink ring 28 to recover the original shape, and the taper surface 28a,
The ring 18 is also pressed against the outer peripheral surface of the shaft 12 in the radial direction by the wedge action of the tapered surfaces 18d and the tapered surfaces 18d and 26a. Moreover, the flange 14 and the spacer 26, the spacer 26 and the ring 18, and the ring 18 and the shaft 12
Since the adhesive 22 is applied between the ring 18 and the ring 18, the adhesive force of the adhesive 22 is exhibited.
Is securely fixed to the shaft 12.

In the fourth embodiment shown in FIG.
The ring 18 may be shrink-fitted, or the shaft 12 or the ring 18 may be tapered, as shown in FIG. 2 or 3, or the sleeve 24 may be located between the shaft 12 and the ring 18. The ring 18 of the collar 14
It is also possible to omit the spacer 26 by forming a tapered surface on the side surface opposite to.

[0029]

Fifth Embodiment FIG. 5 shows a roll according to a fifth embodiment, in which a disc spring 30 is elastically interposed between a ring 18 fitted to the shaft 12 and a flange portion 14. Has been inserted. The male screw 1 formed on the shaft 12
The ring 18 is pressed into contact with the flange 14 via a disc spring 30 by a nut 20 screwed into the nut 6. An adhesive 22 is applied between the inner peripheral surface of the ring 18 and the outer peripheral surface of the shaft 12, and the ring 18 is fixed to the shaft 12 by the elastic restoring force of the disc spring 30 and the adhesive force of the adhesive 22. Have been.

[0030]

Next, the operation of assembling the roll according to the fifth embodiment will be described. The disc spring 30 is extrapolated to the outer periphery of the shaft 12, and the spring 30 is compressed by an appropriate pressing means in a state where the spring 30 is in contact with the flange 14. In this state, the adhesive 2
The ring 18 is fitted to the shaft 12 to which the 2 has been applied, and one side thereof is brought into contact with the disc spring 30. Next, a nut 20 is screwed into the male screw 16 of the shaft 12 to form a ring 18.
Is pressed against the flange portion 14 via the disc spring 30. Disc spring 3
By releasing the compressive force acting on zero, the ring 18 is brought into contact with the nut 20 by the elastic restoring force of the disc spring 30. That is, the ring 30 causes the shaft 12 to move by the elastic restoring force of the disc spring 30 and the adhesive force of the adhesive 22.
Fixed securely.

In the fifth embodiment shown in FIG.
A disc spring 30 may be inserted between the ring 18 and the nut 20, and in this case, the ring 18 can be shrink-fitted in advance. In the fifth embodiment, the ring 30 and the shaft 12 may be tapered as shown in FIG. Further, it is recommended that the nut 20 be bonded and fixed to the external thread 16 of the shaft 12 with an adhesive 22.

In each of the above-described embodiments, it is possible to further increase the fixing force by using the fixing method using the key and the key groove together. Further, as the surface to which the adhesive is applied, the application surface shown in each embodiment is preferable, but any position and any range may be selected as the application surface as long as an adhesive effect can be obtained. Further, in each of the embodiments, the case where the rolling roll in which the ring is fitted and fixed to the shaft has been described, but the present invention is not limited to this, and it is necessary to fix and fix the ring as a separate member to the shaft. Certain techniques are generally available. The number of rings fixed to the shaft is 1
Not only one but also two or more can be similarly fitted and fixed.

[0033]

As described above, according to the roll and the method for assembling the same according to the present invention, since the ring is fixed to the shaft by the adhesive force of the adhesive, the assembling process can be simplified and the cost can be reduced. it can. Also, a large force is not required for the assembling work, and the workability is improved. In addition, when used in combination with a conventional technique such as shrink fitting, there is an advantage that higher fixing strength can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a roll according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a roll according to a second embodiment of the present invention.

FIG. 3 is an explanatory view showing a roll according to a third embodiment of the present invention.

FIG. 4 is an explanatory view showing a roll according to a fourth embodiment of the present invention.

FIG. 5 is an explanatory view showing a roll according to a fifth embodiment of the present invention.

[Explanation of symbols]

 12 Shaft 14 Flange 18 Ring 20 Nut 22 Adhesive

Claims (4)

[Claims] An adhesive (22) comprising a shaft (12) and a wear-resistant ring (18) fitted around the outer periphery of the shaft (12).
A roll which is adhered through a roll. 2. A ring (18) fitted on said shaft (12).
A nut (20) is screwed onto the outer periphery of the shaft opposite to the positioning member (14) provided on the shaft (12), and a ring (5) is provided between the nut (20) and the positioning member (14). The roll according to claim 1, wherein the roll presses (18). 3. The roll according to claim 1, wherein the adhesive (22) is an anaerobic adhesive. 4. A shaft (12) and a wear-resistant ring.
(18) is applied to at least one of the adhesives (22), and the ring (18) is fitted around the outer periphery of the shaft (12) with the applied surface of the adhesive (22) in contact therewith. A method for assembling a roll, wherein the abutting portions of the two (12, 18) are adhered by the adhesive force of an adhesive (22) by assembling.