JP3047515B2 - Rolling mill spindle coupling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a spindle coupling for connecting a driving device for driving a rolling roll of a rolling mill. In addition, the connection can be easily removed.

[0002]

2. Description of the Related Art A spindle is used to connect a rolling roll and a driving device for driving the rolling roll. The driving device side of the spindle is mechanically connected, while the rolling roll side facilitates roll change. For this purpose, a spindle coupling is used.

In a normal spindle coupling, a roll neck of a rolling roll is cut off in parallel on both sides of a cylindrical axis to form a substantially oval cross section, and a corresponding hollow portion is formed at an end of the spindle. They are fitted and connected to each other. In such a spindle coupling, a slight clearance is formed in consideration of thermal expansion during operation and the like for attachment and detachment accompanying roll exchange,
During operation, this clearance causes roll vibration.

Therefore, conventionally, as a coupling capable of preventing roll vibration, for example, Japanese Unexamined Utility Model Publication No. 58-14
Japanese Patent No. 3007 discloses one proposal. this is,
As shown in FIG. 4, the fixed wedge 1 and the slide wedge 2 are arranged to face the hollow part 4 of the coupling 3, and the roll 7 of the rolling mill in which the push-up block 6 is arranged at the end of the roll neck 5 slides. By inserting the slide wedges 2 and 2 into the coupling 3 by inserting the roll wedges 2 and 2 into the hollow portion 4 formed between the wedges 2 and 2, the roll neck 5 is fitted to the coupling 3 by holding the side surfaces of the roll neck 5. The gap between the fitting portions in the above is eliminated to suppress roll vibration due to rattling during roll rotation.

In addition to suppressing the roll vibration caused by the gap between the couplings, as a mechanism for preventing the coupling from falling off, the lock pin is protruded by a spring during the rotation of the roll, so that the coupling state is maintained. When removing
An automatic attachment / detachment mechanism for supplying a hydraulic pressure to push back a lock pin (Japanese Patent Application Laid-Open Nos. Sho 62-3814 and
No. 2,598,813) has been proposed.

[0006]

However, in the conventional coupling 3, when the roll neck 5 thermally expands due to the heat caused by rolling, the slide wedges 2 and 2 do not come off when the rolls are replaced, and until the roll neck 5 cools. There is a problem that the roll exchange operation cannot be performed. In addition, the suppression of roll vibration is not a direct function, but even if you try to eliminate backlash by pressing the lock pin with a spring, clearance is required between the lock pin and the hole where the lock pin enters, preventing dropout. Even if it is possible, the play of the coupling cannot be eliminated. The present invention has been made in view of the problems of the related art, and during the operation of the rolling mill, while eliminating the gap, suppressing the vibration and enabling high-speed rolling, the predetermined gap when the roll is replaced. An object of the present invention is to provide a spindle coupling of a rolling mill that can be formed and easily disconnected.

[0007]

In order to solve the problems of the prior art, a spindle coupling of a rolling mill according to the present invention is provided in a spindle coupling body having a hollow portion into which a roll neck is inserted. A pressing cylinder mechanism having a pressing piston for pressing the roll neck to eliminate backlash during rotation is provided, and a detachable fluid coupling for supplying and discharging working fluid to and from the pressing cylinder mechanism is provided on the outer periphery of the spindle coupling body. It is characterized by the following.

The spindle coupling of the rolling mill according to the present invention, in addition to the above-described configuration, supplies the working fluid while maintaining the pressurized state of the working fluid supplied between the fluid coupling and the pressing cylinder mechanism. And a pressure accumulating mechanism that can be provided.

[0009]

According to the spindle coupling of this rolling mill, a pressing cylinder mechanism is provided on the spindle coupling body and a pressure accumulating mechanism for the working fluid is provided. By supplying and holding the working fluid tightly, it is possible to eliminate backlash by the pressing piston while eliminating the need to supply the working fluid during operation, while providing the clearance required for disconnection by discharging the working fluid from the fluid coupling. We are trying to secure.

According to the spindle coupling of this rolling mill, a pressing cylinder mechanism is provided on the spindle coupling body and a pressure accumulating mechanism for the working fluid is provided. By supplying the working fluid through the pressure accumulator and accumulating it,
While it is not necessary to supply the working fluid during operation, it is possible to more reliably eliminate the backlash by the pressing piston, while ensuring the clearance required for disconnection by discharging the working fluid from the fluid coupling. Therefore, even if a pressing cylinder mechanism is used, high-speed rolling can be performed with a simple mechanism without using a special fluid rotary joint such as a slip ring.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 3 show an embodiment of a spindle coupling of a rolling mill according to the present invention. FIG. 1 is a sectional view, FIG. 2 is a transverse sectional view, and FIG. 3 is a front view of a power transmission system.

First, as shown in FIG. 3, in a power transmission system of a rolling mill to which the spindle coupling of the rolling mill is applied, an output shaft of a motor 11 is connected to a speed reducer 12. Spindle 1 for each of the two output shafts
3, 14 are connected. These spindles 13 and 1
Spindle couplings 15 and 16 are connected to the leading end of the roll 4, and the roll neck 1 of the rolls 17 and 18 of the rolling mill.
7 a and 18 a can be connected and detached, and the driving force of the motor 11 can be transmitted to the rolls 17 and 18.

Next, the spindle couplings 15, 16 of the present invention used in the power transmission system of such a rolling mill will be described.
1 and 2, the spindle coupling 15 has a cross-sectional shape in which both side surfaces of a cylinder of a roll neck 17a of a roll 17 of a rolling mill are cut in parallel as shown in FIGS. Are connected to and disconnected from an oval-shaped distal end portion. A hollow portion 20 into which the roll neck 17a is inserted is formed in the spindle coupling body 19, and the cross-sectional shape of the hollow portion 20 is also oval-shaped. It is formed in such a size that a predetermined clearance is formed around it when the roll neck 17a is inserted.

In the spindle coupling body 19, a cylinder portion 21 which penetrates radially to the hollow portion 20 at the top (or side surface, or both) of the arc portion of the hollow portion 20 is provided at two axial positions (or 1). The pressing cylinder mechanism 23 is formed by fitting the pressing piston 22 reciprocally to each of them.

Therefore, if the roll neck 17a of the roll 17 is pressed against the wall surface of the hollow portion 20 of the spindle coupling body 19 so that the pressing piston 22 of the pressing cylinder mechanism 23 projects, the play can be eliminated. become.

Therefore, as a mechanism for supplying and discharging the working fluid to and from the pressing cylinder mechanism 23, one of a hydraulic coupling 24 constituting a fluid coupling is provided on the outer peripheral portion of the spindle coupling body 19, and the other is provided. A hydraulic coupling 25 is provided at the tip of a hydraulic supply / discharge device 26,
Supplying or discharging hydraulic oil can be performed by pressing each other.

That is, these hydraulic couplings 24,
The valve body 25 includes a cylinder chamber 27 having a conical sealing surface 27a formed at an intermediate portion, and a valve body 28. A projection 28a is formed at the tip of the valve body 28, and the flow path 30 is closed by a spring 29. The valve body 28 is urged, and the flow passages 30 and 30 of both the hydraulic couplings 24 and 25 are communicated so that the protrusions 28 a are brought into contact with each other to push back both valve bodies 28 against the spring 29. can do. The hydraulic coupling 24 and the pressing cylinder mechanism 23 communicate with each other through an oil passage 31 in the spindle coupling body 19.

Further, the spindle coupling 15
Therefore, during operation of the rolling mill, it is necessary to always keep the pressing piston 22 of the hydraulic cylinder mechanism 23 in a protruding state to eliminate backlash. Therefore, as shown in FIG. A pressure accumulating mechanism 32 is provided in communication with the path 31 so that hydraulic pressure can be secured without receiving supply of hydraulic oil from outside.

In the pressure accumulating mechanism 32, a pressure accumulating chamber 33 is formed in the spindle coupling main body 19, and a pressure accumulating piston 34 is mounted inside the accumulating chamber 33.
Can be maintained in a pressurized state, and the rear part of the accumulator 33 communicates with the atmosphere.

As shown in FIGS. 2 and 3, the hydraulic coupling 25 is disposed at a predetermined position in the power transmission system, is connected to a hydraulic cylinder 36, and is reciprocally movable.
It is configured to be detachable from the hydraulic coupling 24 on the spindle coupling body 19 side.

A hydraulic supply / discharge device 26 is connected to the hydraulic coupling 25. The hydraulic supply / discharge device 26 is provided with a switching valve 38 provided through a flexible hose 37.
And a hydraulic pump 39 and an oil tank 40 connected to the switching valve 38.

The operation of the spindle coupling 15 of the rolling mill configured as described above will be described.

(A) To eliminate backlash when mounting the roll neck 17a (18a). The phases of the roll neck 17a of the roll 17 of the rolling mill and the spindle coupling 15 are matched so that the hydraulic coupling 24 faces the hydraulic coupling 25 on the fixed side.

The switching valve 38 of the hydraulic supply / discharge device 26 is switched to the open side communicating with the oil tank 40, and the hydraulic coupling 25 is lowered by the hydraulic cylinder 36 to abut on the hydraulic coupling 24, and the projection of the valve body 28 is formed. Part 28
a, the comrades are pushed back against the spring 29,
Is communicated with the oil passage 31. Then, the pressing cylinder mechanism 2
3 and the pressure oil remaining inside the pressure accumulating mechanism 32 are discharged to the oil tank 40, and the pressing piston 22 is in a free state.

When the pressing piston 22 is in a free state in this way, the roll neck 17 a of the roll 17 of the rolling mill is inserted into the hollow portion 20 of the spindle coupling 15. At this time, since a predetermined clearance is provided in the hollow portion 20 of the spindle coupling 15,
It can be installed smoothly.

Next, the oil pump 3 of the hydraulic supply / discharge device 26
9, the switching valve 38 is switched to the hydraulic pump 39 side, and the hydraulic oil is supplied to the pressing cylinder mechanism 23 and the pressure accumulating mechanism 3 via the hydraulic couplings 25 and 24 and the oil passage 30.
Feed to 2. Then, the pressing piston 22 of the pressing cylinder mechanism 23 is protruded, and the roll neck 1 of the roll 17 is pressed.
7a is pressed against the wall surface of the spindle coupling 15 so that there is no backlash. The hydraulic oil supplied to the pressure accumulating mechanism 32 pushes the pressure accumulating piston 34 in the pressure accumulating chamber 33 back against the spring 35, and in this state, the hydraulic couplings 24, 2
When the connection state of 5 is released, the hydraulic oil is stored in a pressurized state. Therefore, the pressure accumulating mechanism 3 is
The hydraulic oil pressurized and stored in step 2 is supplied, and without any external supply of hydraulic oil, the rolling mill can be operated without any backlash during operation. Can be.

(B) When the roll neck 17a (18a) is pulled out. The phases of the roll neck 17a of the roll 17 of the rolling mill and the spindle coupling 15 are matched so that the hydraulic coupling 24 faces the hydraulic coupling 25 on the fixed side.

The switching valve 38 of the hydraulic supply / discharge device 26 is switched to the open side communicating with the oil tank 40, and the hydraulic coupling 25 is lowered by the hydraulic cylinder 36 to abut on the hydraulic coupling 24, and the projection of the valve body 28 Part 28
a, the comrades are pushed back against the spring 29,
Is communicated with the oil passage 31. Then, the pressing cylinder mechanism 2
The hydraulic oil stored in the pressure storage mechanism 3 and the pressure storage mechanism 32 is discharged to the oil tank 40. For this reason, the pressing piston 22
Becomes free and the roll neck 17a
However, due to the clearance between the hollow portion 20 of the spindle coupling 15 and the roll neck 17a, the spindle coupling 15 becomes free.

When the pressing piston 22 and the roll neck 17a are in a free state in this manner, the roll neck 17a of the roll 17 of the rolling mill used so far is used.
From the hollow portion 20 of the spindle coupling 15. Therefore, even when the roll neck 17a thermally expands due to the heat accompanying the rolling, the clearance between the hollow portion 20 of the spindle coupling 15 and the roll neck 17a is increased.
Can be extracted smoothly.

In the above embodiment, the pressure accumulating mechanism 32 is provided to supply the hydraulic oil. However, the pressure accumulating mechanism may be omitted by supplying the hydraulic oil in a high-pressure state to a certain degree to make it closed. it can. Further, in the above-described embodiment, the pressing cylinder mechanism is pressed with the hydraulic oil, but may be configured as a pressing cylinder mechanism using another working fluid. Further, although the pressing cylinder mechanism is provided at one position of the roll neck and pressed, the pressing cylinder mechanism may be disposed so as to be opposed to and pressed to sandwich it.

Further, the fluid coupling is not limited to the embodiment, but may have another structure as long as it can be easily attached and detached. It goes without saying that changes may be made to the components without changing the gist of the present invention.

[0032]

According to the spindle coupling of the rolling mill according to the present invention, as described above in detail with one embodiment, a pressurizing cylinder mechanism is provided on the spindle coupling body to supply working fluid from the fluid coupling. By supplying the working fluid through the detachable fluid coupling while the roll is stopped and maintaining the working fluid as it is, the pressing piston eliminates the play of the roll neck while eliminating the need for the supply of the working fluid during operation. And high speed rolling can be performed while preventing vibration.

Further, according to the spindle coupling of the rolling mill of the present invention, since the pressing cylinder mechanism is provided on the spindle coupling main body and the pressure accumulating mechanism for the working fluid is provided, the fluid which can be detached and attached while the roll is stopped is provided. By supplying the working fluid via the joint and accumulating the pressure in the pressure accumulating mechanism, the pressing piston can more reliably eliminate the play of the roll neck while eliminating the need for the supply of the working fluid during operation, preventing vibration. High speed rolling is possible.

Further, by discharging the working fluid of the pressing cylinder mechanism and the pressure accumulating mechanism from the fluid coupling, a clearance required for disconnection can be secured, and the roll neck can be smoothly taken out even if thermal expansion accompanying rolling occurs. be able to. Further, even if the pressing cylinder mechanism is used, the pressure of the working fluid during operation can be secured by a simple pressure accumulating mechanism without using a special fluid rotary joint such as a slip ring.

[Brief description of the drawings]

FIG. 1 is a sectional configuration diagram according to an embodiment of a spindle coupling of a rolling mill of the present invention.

FIG. 2 is a cross-sectional view of one embodiment of a spindle coupling of a rolling mill according to the present invention.

FIG. 3 is a front view of a power transmission system to which the spindle coupling of the rolling mill of the present invention is applied.

FIG. 4 is a perspective view of a conventional mechanism for eliminating backlash of a coupling.

[Explanation of symbols]

 13, 14 Spindle 15, 16 Spindle coupling 17, 18 Roll 17a, 18a Roll neck 19 Spindle coupling body 20 Hollow part 22 Pressing piston 23 Pressing cylinder mechanism 24, 25 Hydraulic coupling (fluid coupling) 26 Hydraulic supply / discharge device 32 Accumulator

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 35/14 F16D 1/10

Claims (2)

(57) [Claims] 1. A pressing cylinder mechanism having a pressing piston for pressing the roll neck to eliminate backlash during rotation is provided on a spindle coupling body in which a hollow portion into which the roll neck is inserted is formed. A spindle coupling for a rolling mill, wherein a detachable fluid coupling for supplying and holding and discharging a working fluid to and from a cylinder mechanism is provided on an outer periphery of a spindle coupling body. 2. A pressure accumulating mechanism which can supply a working fluid while maintaining a pressurized state of a working fluid supplied between the fluid coupling and the pressing cylinder mechanism. Spindle coupling of rolling mill.