JP3237666B2 - Roll and roll assembly method - 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 for rolling a metal member into a wire or a rod.

[0002]

2. Description of the Related Art Generally, steel bars such as reinforcing bars are manufactured by rolling. In this rolling, a metal material is passed between rotating rolling rolls to process into a wire or a bar having a cross-sectional shape corresponding to a mold formed on the rolling rolls. Because it is continuous, fast and efficient, it is widely used in the production of various long products.

[0003] Since excellent wear resistance and heat resistance are required for the roll portion of the rolling roll and toughness is required for the shaft portion,
An assembly-type rolling roll is more suitable than a solid rolling roll. A ring-shaped roll sleeve made of a hard material typified by a cemented carbide is used for the roll portion, and is fitted and fixed on the outer periphery of the shaft portion. When a key is used for the fixing means, a key groove is formed. Since cracks due to stress concentration are likely to occur at the corners, it is common that the side faces are sandwiched via a ring-shaped spacer ring and fixed by frictional force.

If the roll sleeve rotates relative to the shaft during the rolling operation, the rotating torque of the shaft is not correctly transmitted to the roll sleeve, and the operation speed of the material to be rolled fluctuates, so that the accuracy of the product cannot be guaranteed. . Therefore, the roll sleeve must be pressed so as to maintain a sufficient friction holding force, and must be easily replaceable due to wear due to aging of the roll sleeve.

Japanese Patent Application Laid-Open No. 9-29314 discloses a clamp structure for a roll sleeve in which a tightening nut is improved (hereinafter referred to as "A"). FIG. 5 shows a cross-sectional view of a rolling roll 100 disclosed by A. 101 is
The shaft has a flange 102 at one end and a screw 103 at the other end. On the outer periphery of the shaft 101, elastic members 104, spacers 105, and roll sleeves 106 are alternately fitted from the flange 102 side in order, and a tightening nut 107 screwed to the screw 103 at the other end is arranged. A plurality of screw holes 108 penetrating the body are provided in the tightening nut 107 at predetermined intervals in parallel with the shaft axis, and set bolts 109 are screwed into the screw holes 108.

[0006] In assembling the rolling roll 100, ring-shaped members (104, 105, 106) are fitted as shown in FIG.
From the other end, a tightening nut 107 is screwed into the screw 103 so as to approach the ring-shaped member, and the set bolt 109 screwed into the screw hole 108 is extended to set the set bolt 1.
09 is brought into contact with the spacer 105. Spacer 1
The pressing force to 05 is equalized by controlling the torque of the set bolt 109. Incidentally, the elastic member 104 composed of a disc spring or the like absorbs heat generated during the rolling operation and thermal distortion caused by cooling during the stop, and equalizes the pressing force to the spacer 105.

If the tightening torque fluctuates, the axial distortion of the shaft 101 becomes asymmetric, and the shaft 101
Of the set bolt 109, which has the strongest pressing force, tends to buckle. In addition, when the torque is strictly controlled, a difference in the pressing force of each set bolt 109 cannot be avoided, and the roll sleeve 1 during the rolling operation is inevitable.
It is difficult to avoid loosening of the set bolt 109 due to thermal expansion or mechanical vibration caused by the heat generation at 06.

As a means for solving these problems, a structure disclosed in Japanese Patent Application Laid-Open No. Hei 10-113708 is disclosed (hereinafter referred to as "Otsu"). FIG. 6 shows a cross-sectional view of a rolling roll 200 disclosed by Otsu. 101 is a shaft having a flange 102 at one end and a first screw 103 formed at the other end. On the outer periphery of the shaft 101, elastic members 104, spacers 105, and roll sleeves 106 are alternately fitted in order from the flange 102 side.
3, a pressurized fluid supply mechanism 201 is screwed. On the outer periphery of the pressurized fluid supply mechanism 201, a second screw 202 having the same thread as the first screw 103 is formed, and a lock nut 209 is screwed thereto.

The pressurized fluid supply mechanism 201 has a cylinder groove 2
03 is formed, and a ring-shaped piston 204 is slidably inserted therein to prevent the pressurized fluid from leaking.
A ring 205 and an O-ring 206 on the outer diameter side are configured to be mounted on the piston 204. In addition, a plug 208 for preventing foreign matter from entering is screwed into the introduction hole 207 of the pressurized fluid.

In the assembly of the rolling roll 200, ring-shaped members (104, 105, 106) are fitted as shown in FIG.
Pressurized fluid supply mechanism 20 screwed to first screw 103
1 is removed, and a high-pressure pressurized fluid is supplied to the introduction hole 207 from a separately prepared hydraulic pressure supply device.
The ring-shaped member is pressed through the pin 04. When the pressure of the pressurized fluid is stabilized at a predetermined hydraulic pressure, the second screw 20
The lock nut 209 screwed into the nut 2 is screwed, and the end face of the lock nut 209 presses the spacer 105. Thereafter, the hydraulic pressure supply device connected to the introduction hole 207 is removed, the hydraulic pressure is reduced, and the plug 208 is mounted.

With the above configuration, a sufficient pressing force can be applied to the ring-shaped member by the pressurized fluid supply mechanism 201, and the lock nut 209 is easily rotated to abut the spacer 105. It is described that the roll sleeve 106 can be held and fixed by such a simple operation.

[0012]

The roll roll of the assembly type has a structure in which the roll sleeve made of a hard material can be replaced when its use limit is reached due to the progress of wear and the like, and the rotating torque of the shaft is reduced. It must be ensured that it is transmitted to the roll sleeve. The present invention is to improve the inevitable fluctuation of the pressing force for each of a plurality of set bolts on the former. In addition, the present invention proposes a rolling roll capable of accurately holding a roll sleeve and an assembling method thereof by improving the complicated pressurized fluid supply mechanism of the second party.

[0013]

According to a first embodiment of the assembling type rolling roll, a disc spring, which is a ring-shaped elastic member, a spacer and a roll sleeve are alternately fitted around an outer periphery of a shaft having a flange on one side. The other end is clamped by a tightening nut, and a screw is formed on the inner and outer circumferences, and a plurality of screw holes penetrating through the body are screwed onto the shaft with a screw-like nut arranged in a ring shape. A lock nut is screwed onto the outer periphery to press the side surface of the spacer toward the flange.

In the second embodiment, a ring-shaped elastic member such as a disc spring, a spacer and a roll sleeve are alternately fitted on the outer periphery of a shaft having a flange portion on one side, and the other end of the shaft is fastened by a fastening nut via the spacer. A screw is formed on the outer periphery of the flange portion, a plurality of screw holes penetrating through the body portion of the flange portion are arranged in a ring shape, and the side surface of the spacer is locked by a lock nut screwed on the outer periphery of the flange portion. To the tightening nut side.

The assembling method of the assembling roll is as follows. In the roll of the first embodiment or the second embodiment, a set bolt is screwed into a screw hole formed in a body portion of a tightening nut or a flange portion to form a spacer. Pre-pressurize the sides, then
This is achieved by tightening the lock nut, elastically absorbing the fluctuation of the axial pressing force by the ring-shaped elastic member, pressing the side surfaces of the spacers evenly, and then removing the set bolt.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. First, FIG.
The sectional view of the rolling roll 1 of an example is shown. A shaft 2 has a flange 3 at one end and a screw 4 at the other end.
On the outer periphery of the shaft 2, a disc spring 5 as a ring-shaped elastic member, spacers 6 a and 6 b, and a roll sleeve 7 are alternately fitted from the flange 3 side, and are the same as the screw 4 screwed to the screw 4 at the other end. A tightening nut 8 provided with a screw on the inner and outer circumferences is provided. A plurality of screw holes 8 a penetrating through the body are formed in the tightening nut 8 in a ring shape, and a lock nut 9 screwed around the outer periphery of the tightening nut 8 is used.
The ring-shaped members (5, 6a, 6b, 7) are clamped and fixed. If the screw holes provided in a ring shape are arranged at equal intervals around the shaft, the torque of the set bolt can be easily controlled.

The disc spring 5 as a ring-shaped elastic member is
The purpose of the present invention is to absorb the heat distortion during the rolling operation due to the heat generated during the rolling operation and the cooling during the stop, thereby equalizing the pressing force applied to the roll sleeve 7. The spacers 6a and 6b may be made of alloy steel, and are provided with a keyway on the inner diameter side.
, The pressing force for maintaining the rotational torque transmitted from the shaft 2 to the roll sleeve 7 can be reduced. Since the roll sleeve 7 is required to have excellent wear resistance and heat resistance, it is preferable that the roll sleeve 7 be made of a hard member such as a cemented carbide, ceramics, or cermet.

The tightening nut 8 is detented by a first set screw 10 at a position where a sufficient pressing force is applied to the ring-shaped member by an assembling method described later. Lock nut 9
Is screwed to the outer periphery of the tightening nut 8 by an assembling method to be described later, and brought into close contact with the end face of the spacer 6a, and then the rotation is stopped by the second set screw 11. In recent years, the rolling speed has been increasing and the speed has been increasing, and therefore, the lock nut is easily loosened due to mechanical vibration. This problem is solved by using the set screw of the present invention, and stable rolling can be performed for a long time.

FIG. 2 is a sectional view for explaining the procedure for assembling the rolling roll 1 of the first embodiment. On the outer periphery of the shaft 2 having a flange 3 on one side and a screw 4 formed on the other end, a disc spring 5 as a ring-shaped elastic member is arranged in order from the flange 3 side;
Spacers 6a, roll sleeves 7, and spacers 6b are fitted alternately, and a tightening nut 8 provided on the inner and outer circumferences with screws having the same screws as the screws 4 screwed to the screws 4 at the other end is screwed. The end face of the tightening nut 8 may be set at a position where it comes into light contact with the spacer 6a.

Since a plurality of screw holes 8a are formed in the tightening nut 8 in a ring shape so as to penetrate the body, set bolts 12 are screwed into the holes, and torque of the plurality of set bolts 12 is controlled. By pre-pressurizing, the ring-shaped members (5, 6a, 6b, 7) are further compression-clamped by S. Then, the rotation of the screw 4 is stopped by the first set screw 10 shown in FIG. By this process,
It is possible to omit the fluid liquid sealing member requiring the accuracy and the pressurized fluid supply mechanism 201 requiring a complicated pressurized fluid supply operation as described in the prior art. In addition, in the technique of Otsu, complicated processing and a large occupied space are required for the pressurized fluid supply unit. With the structure of the present application, the set bolt 1
It is sufficient if there is a space for disposing the screw hole 8a into which the screw 2 is screwed, and the degree of freedom in design is high.

In the next step, the lock nut 9 is screwed onto the outer periphery of the tightening nut 8, and as shown in FIG.
a after tightening the lock nut 9 to a position where the
A locking screw 11 is used to stop the tightening nut 8 from turning. Finally, the set bolt 12 is removed from the tightening nut 8. According to this process, in the prior art A, the head of the set bolt 109 having the strongest pressing force is buckled due to the variation in the pressing force of the set bolt 109. , And there is a problem that the set bolt 109 is loosened due to thermal expansion or mechanical vibration caused by heat generation of the roll sleeve 106 during the rolling operation. The present invention
The above problem can be solved by removing the set bolt 12 and pressing the spacer 6a evenly with the end face of the lock nut 9.

FIG. 3 is a sectional view of a rolling roll 20 according to the second embodiment. In the second embodiment, the function of the tightening nut 8 in the first embodiment is transferred to a flange portion. 1
Reference numeral 3 denotes a shaft in which a screw 15 is formed on the outer periphery of one flange portion 14 and a screw 4 is formed on the other. On the outer periphery of the shaft 13, a spacer 6 a from the flange portion 14 side,
A roll sleeve 7, a spacer 6b, and a disc spring 5 as a ring-shaped elastic member are alternately fitted, and a set nut 16 is lightly nipped and screwed onto the screw 4 at the other end. The set nut 16 is a third set screw 17
It is preferable to provide a detent at the position.

FIG. 4 is a sectional view for explaining the procedure for assembling the rolling roll 20 of the second embodiment. A set bolt 12 is screwed into a flange portion 14 in which a plurality of screw holes 14a penetrating a body portion are formed in a ring shape at a position where the ring-shaped member is sandwiched by a set nut 16 on the outer periphery of a shaft 13. By tightening the plurality of set bolts 12 while controlling the torque, the ring-shaped member is further compressed and clamped by S. Then, the lock nut 9 is stopped by the second set screw 11 shown in FIG. 3 at a position where a sufficient pressing force is applied to the ring-shaped member. Finally, the set bolt 12 is removed from the flange portion 14.

According to such an assembling procedure, the second embodiment is as follows.
The problem of the set bolt 109 pointed out in the prior art can be solved, and the uneconomic pressurized fluid supply mechanism 201 pointed out in the prior art can be omitted.

[0025]

According to the present invention, a plurality of set bolts are used in an assembling type rolling roll in which a roll sleeve and a ring-shaped elastic member are fitted on the outer periphery of a shaft having a flange on one side, and clamped from the other end by a tightening nut. The ring-shaped member is mechanically clamped, and a lock nut is screwed onto the outer periphery of the tightening nut or flange portion of the set bolt, and the ring-shaped member is brought into contact with the ring-shaped member. Since the set bolts are removed at the end after pressing, it is not necessary to manage the pressing force between the set bolts, and a fluid liquid sealing member requiring precision and a complicated pressurized fluid supply operation are required. The pressurized fluid supply mechanism can be omitted. As a result, it is possible to provide an inexpensive assembling type rolling roll that is easy to assemble and has no problems such as set bolts being loosened due to thermal expansion or mechanical vibration caused by heat generated by the roll sleeve during rolling.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rolling roll according to a first embodiment of the present invention.

FIG. 2 is a sectional view illustrating a procedure of assembling the rolling roll according to the first embodiment of the present invention.

FIG. 3 is a sectional view of a rolling roll according to a second embodiment of the present invention.

FIG. 4 is a sectional view illustrating a procedure of assembling a rolling roll according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional rolling roll of the former.

FIG. 6 is a cross-sectional view of a conventional rolling roll according to the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolling roll of 1st Example 2, 13 Shaft 3 Flange 4, 15 Screw 5 Disc spring 6b, 6a Spacer 7 Roll sleeve 8 Tightening nut 8a, 14a Screw hole 9 Lock nut 10 First set screw 11 Second set Screw 12 Set bolt 14 Flange 16 Set nut 17 Third set screw 20 Rolling roll of the second embodiment

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-29314 (JP, A) JP-A-10-113708 (JP, A) JP-A-62-93013 (JP, A) JP-A-62-93013 93012 (JP, A) JP-A-54-13450 (JP, A) JP-A-52-101350 (JP, A) JP-A-6-61302 (JP, U) JP-A-51-101334 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 27/03 520 B21B 27/02

Claims (4)

(57) [Claims] A roll sleeve and a ring-shaped elastic member are fitted on the outer periphery of a shaft having a flange on one side, and a screw is formed on an inner and outer periphery of a rolling roll sandwiched by a tightening nut from the other end. A plurality of threaded through holes are screwed onto a shaft with a tightening nut arranged in a ring shape, a lock nut is screwed around the outer circumference of the tightening nut, and a side surface of the roll sleeve is pressed toward the flange. And rolling roll. 2. A rolling sleeve, in which a roll sleeve and a ring-shaped elastic member are fitted on the outer periphery of a shaft having a flange on one side, and a screw is formed on the outer periphery of the flange portion in a rolling roll sandwiched from the other end by a tightening nut. A plurality of screw holes penetrating the body of the flange portion are arranged in a ring shape, and a side face of the roll sleeve is pressed toward the tightening nut side by a lock nut screwed on an outer periphery of the flange portion. roll. 3. The rolling roll according to claim 1, wherein the ring-shaped elastic member is a disc spring. 4. The rolling roll according to claim 1, wherein a set bolt is screwed into a tightening nut or a screw hole formed in a body portion of the flange portion to pre-press the side surface of the roll sleeve. And further pressing the side surfaces of the roll sleeve evenly, and then removing the set bolts.