JPH04344811A - Spindle coupling for rolling mill - Google Patents

Abstract

PURPOSE:To suppress the vibration by eliminating the clearance of a roll neck of a rolling mill, and simultaneously, to simply detach a roll by forming a prescribed clearance at the time of changing the roll. CONSTITUTION:On a spindle coupling main body 19, a pressure cylinder mechanism 23 and an accumulating mechanism 32 are provided, and an operating fluid is supplied and accumulated through hydraulic couplings 24, 25 which can be attached/detached in the course of stopping of a roll, by which looseness is eliminated by a pressure piston, while eliminating the need for supplying the operating fluid during operation, vibration is prevented and rolling can be executed at a high speed. On the other hand, by discharging the operating fluid, a clearance required for a connection release is secured.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to the improvement of a spindle coupling for connecting with a drive device for driving the rolling rolls of a rolling mill.The present invention relates to the improvement of a spindle coupling for connecting with a driving device for driving the rolling rolls of a rolling mill. Moreover, the connection can be easily removed.

0002

[Prior Art] A spindle is used to connect a rolling roll and a drive device that drives the spindle.The driving device side of the spindle is mechanically connected, while the rolling roll side is connected mechanically. Spindle couplings are used for this purpose.

[0003] In a typical spindle coupling, the roll neck of a rolling roll is shaved off parallel to both sides of the cylindrical axis to form a substantially oval cross section, and a corresponding hollow portion is formed at the end of the spindle. They are fitted together and connected. In such spindle couplings, a slight clearance is formed to allow for attachment and detachment during roll exchange and to account for thermal expansion during operation, and this clearance causes roll vibration during operation. There is.

[0004] Conventionally, therefore, as a coupling that can prevent roll vibration, for example,
One proposal is made in Publication No. 3007. this is,
As shown in FIG. 4, a fixed wedge 1 and a slide wedge 2 are arranged facing each other in a hollow part 4 of a coupling 3, and a roll 7 of a rolling mill with a push-up block 6 arranged at the tip of a roll neck 5 is slid. The slide wedges 2 and 2 are inserted into the hollow part 4 formed between the wedges 2 and 2, and the slide wedges 2 and 2 are pushed into the coupling 3 to sandwich the sides of the roll neck 5 and fit the roll neck 5 into the coupling 3. The gap between the fitting parts is eliminated to suppress roll vibration due to rattling during roll rotation.

[0005] In addition to suppressing roll vibration caused by coupling gaps, as a mechanism to prevent the coupling from falling off, a lock pin is protruded by a spring while the roll is rotating, and the connected state is maintained. When removing the
An automatic attachment/detachment mechanism that pushes back the lock pin by supplying hydraulic pressure (Japanese Patent Application Laid-open No. 62-3814 and Japanese Patent Application Laid-open No. 61
-2598813, etc.) have been proposed.

[0006]

[Problems to be Solved by the Invention] However, in the conventional coupling 3, when the roll neck 5 thermally expands due to the heat associated with rolling, the slide wedges 2, 2 cannot be removed when changing the rolls, and the roll neck 5 cannot be removed until the roll neck 5 cools down. There is a problem that roll replacement work is not possible. Also, although suppressing roll vibration is not a direct function, even if you try to eliminate play by pressing the lock pin with a spring, etc., clearance is required between the lock pin and the hole where the lock pin goes, preventing it from falling out. Even if you can, you cannot eliminate the play in the coupling. This invention has been made in view of the problems of the prior art.While the rolling mill is in operation, it eliminates gaps and suppresses vibrations to enable high-speed rolling. It is an object of the present invention to provide a rolling mill spindle coupling that can be easily formed and uncoupled.

[0007]

[Means for Solving the Problems] In order to solve the problems of the prior art described above, a spindle coupling for a rolling mill according to the present invention includes a spindle coupling body in which a hollow portion into which a roll neck is inserted is formed. A pressing cylinder mechanism equipped with a pressing piston that presses the roll neck to eliminate play during rotation is provided, and a detachable fluid coupling for supplying and discharging working fluid to the pressing cylinder mechanism is provided on the outer periphery of the spindle coupling body. It is characterized by:

In addition to the above configuration, the spindle coupling for a rolling mill of the present invention maintains the pressurized state of the working fluid supplied between the fluid coupling and the pressing cylinder mechanism to replenish the working fluid. It is characterized by being equipped with a pressure accumulating mechanism that can

[0009]

[Function] According to the spindle coupling of this rolling mill, the spindle coupling main body is provided with a pressure cylinder mechanism and a pressure accumulation mechanism for the working fluid, and the fluid coupling is attached and detached while the roll is stopped. By supplying working fluid and keeping it sealed, it is possible to eliminate rattling by the pressing piston while eliminating the need to supply working fluid during operation, and at the same time, by discharging the working fluid from the fluid coupling, the clearance required for disconnection can be achieved. I'm trying to secure it.

Further, according to this spindle coupling for a rolling mill, the spindle coupling body is provided with a pressure cylinder mechanism and a pressure accumulation mechanism for the working fluid, and the fluid coupling that can be attached and detached while the roll is stopped is provided. By supplying working fluid through the system and accumulating pressure in the pressure accumulating mechanism,
This eliminates the need to supply working fluid during operation, making it possible to more reliably eliminate rattles by the pressing piston, while ensuring the clearance necessary 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]

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 for a rolling mill according to the present invention, in which FIG. 1 is a cross-sectional configuration diagram, FIG. 2 is a cross-sectional view, and FIG. 3 is a front view of a power transmission system.

First, in the power transmission system of a rolling mill to which this rolling mill spindle coupling is applied, as shown in FIG. Spindle 13 on each of the two output shafts
, 14 are connected. These spindles 13, 14
Spindle couplings 15 and 16 are connected to the tips of the roll necks 17 of the rolls 17 and 18 of the rolling mill.
a, 18a, and can be connected to and disconnected from them, so that the driving force of the motor 11 can be transmitted to the rolls 17, 18.

Next, spindle couplings 15 and 16 of this invention used in the power transmission system of such a rolling mill will be described.
This spindle coupling 15, which will be explained using one of the two 15 as an example, has a cross-sectional shape in which both sides of the cylinder of the roll neck 17a of the roll 17 of a rolling mill are shaved off in parallel, as shown in FIGS. 1 and 2. The spindle coupling body 19 is formed with a hollow portion 20 into which the roll neck 17a is inserted, and the cross-sectional shape of this hollow portion 20 is also oval-shaped. The roll neck 17a is sized so that a predetermined clearance is formed around the roll neck 17a when the roll neck 17a is inserted.

The spindle coupling main body 19 also has two (or one) cylinder portions 21 that penetrate radially to the hollow portion 20 at the top (or side surface, or both) of the circular arc portion of the hollow portion 20. A pressing cylinder mechanism 23 is constructed by fitting a pressing piston 22 into each position so as to be able to reciprocate.

Therefore, if the press piston 22 of the press cylinder mechanism 23 is pushed out and the roll neck 17a of the roll 17 is pressed against the wall surface of the hollow part 20 of the spindle coupling body 19, play can be eliminated. become.

Therefore, as a mechanism for supplying and discharging working fluid to and from the press cylinder mechanism 23, one of the hydraulic couplings 24 constituting a fluid coupling is provided on the outer periphery of the spindle coupling body 19, and the other A hydraulic coupling 25 is provided at the tip of the hydraulic supply/discharge device 26,
Hydraulic oil can be supplied or discharged by pressing them against each other.

That is, these hydraulic couplings 24,
25 includes a cylinder chamber 27 in which a conical sealing surface 27a is formed in the middle part and a valve body 28, and a protrusion 28a is formed at the tip of the valve body 28, while a spring 29 closes the flow path 30. The valve body 28 is biased, and the protrusions 28a are brought into contact with each other to push back both valve bodies 28 against the spring 29, thereby communicating the flow paths 30, 30 of both the hydraulic couplings 24, 25. can do. The hydraulic coupling 24 and the pressure cylinder mechanism 23 are communicated with each other through an oil passage 31 within the spindle coupling body 19.

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

This pressure accumulating mechanism 32 has a pressure accumulating chamber 33 formed in the spindle coupling main body 19, a pressure accumulating piston 34 mounted inside and biased by a spring 35, and the pressure accumulating chamber 33
The hydraulic oil supplied to the pressure storage chamber 33 can be maintained in a pressurized state, and the rear part of the pressure storage chamber 33 is communicated with the atmosphere.

Further, as shown in FIGS. 2 and 3, the hydraulic coupling 25 is disposed at a predetermined position in the power transmission system, and is connected to a hydraulic cylinder 36 so as to be able to reciprocate, and is connected to the spindle coupling body 19. side hydraulic coupling 2
4 and is removable.

A hydraulic supply/discharge device 26 is connected to this hydraulic coupling 25, and this hydraulic supply/discharge device 26 is connected to a switching valve 38 provided via a flexible hose 37. It is composed of a hydraulic pump 39 and an oil tank 40.

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

(A) Roll neck 17a (18a)
To eliminate looseness when installing. (2) The roll neck 17a of the roll 17 of the rolling mill and the spindle coupling 15 are aligned in phase so that the hydraulic coupling 24 faces the fixed hydraulic coupling 25.

■ 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 come into contact with the hydraulic coupling 24, and the valve body 28 is lowered. Protrusion 2
8a is pushed back against the spring 29, and the flow path 3
0 is communicated with the oil passage 31. Then, the pressure oil remaining inside the pressure cylinder mechanism 23 and the pressure accumulation mechanism 32 is discharged into the oil tank 40, and the pressure piston 22 becomes free.

■ When the pressing piston 22 is in a free state, the roll neck 17a of the roll 17 of the rolling mill is connected to the hollow part 20 of the spindle coupling 15.
Charge to. At this time, since a predetermined clearance is provided in the hollow portion 20 of the spindle coupling 15, the spindle coupling 15 can be smoothly attached.

■Next, the oil pump 39 of the hydraulic supply/discharge device 26 is operated, and the switching valve 38 is switched to the hydraulic pump 39.
By switching to the side, hydraulic oil is supplied to the pressure cylinder mechanism 23 and the pressure accumulation mechanism 32 via the hydraulic couplings 25 and 24 and the oil passage 30. Then, the pressing piston 22 of the pressing cylinder mechanism 23 is pushed out, and the roll neck 17a of the roll 17 is pressed against the wall surface of the spindle coupling 15 so that there is no play. Further, the hydraulic oil supplied to the pressure accumulation mechanism 32 moves the pressure accumulation piston 34 in the pressure accumulation chamber 33 to the spring 35.
In this state, the hydraulic coupling 24,
When the connection state of 25 is released, the hydraulic oil is stored in a pressurized state. Therefore, the pressure cylinder mechanism 23 is supplied with the hydraulic oil pressurized and accumulated in the pressure accumulation mechanism 32,
Without replenishing hydraulic oil from the outside, the rolling mill can be kept free of backlash during operation, preventing vibrations and allowing high-speed rolling.

(B) Roll neck 17a (18a)
If you pull out the . (2) The roll neck 17a of the roll 17 of the rolling mill and the spindle coupling 15 are aligned in phase so that the hydraulic coupling 24 faces the fixed hydraulic coupling 25.

■ 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 and brought into contact with the hydraulic coupling 24. Protrusion 2
8a is pushed back against the spring 29, and the flow path 3
0 is communicated with the oil passage 31. Then, the hydraulic oil accumulated inside the pressure cylinder mechanism 23 and the pressure accumulation mechanism 32 is discharged to the oil tank 40. For this reason, the pressing piston 2
2 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 now in a free state, the roll neck 17 of the roll 17 of the rolling mill that has been used until now is removed.
a from the hollow part 20 of the spindle coupling 15. Therefore, even if the roll neck 17a thermally expands due to the heat associated with rolling, the clearance between the spindle coupling 15 and the hollow portion 20 allows for smooth extraction.

In the above embodiment, the pressure accumulating mechanism 32 is provided to replenish the hydraulic oil, but the pressure accumulating mechanism may be omitted by supplying hydraulic oil at a somewhat high pressure and creating a sealed state. can. Further, in the above embodiment, the pressure cylinder mechanism is pressed with hydraulic fluid, but the pressure cylinder mechanism may be configured to use other hydraulic fluids. Further, although the pressing cylinder mechanism is provided at one location of the roll neck to press the roll neck, it may be arranged so as to face each other and press the roll neck in a sandwiching manner.

Furthermore, the fluid coupling is not limited to the embodiment, and may be of any other structure as long as it can be easily attached and detached. Further, it goes without saying that changes may be made to the constituent elements without changing the gist of the invention.

[0032]

Effects of the Invention As described above in detail with one embodiment, according to the spindle coupling for a rolling mill of the present invention, a pressing cylinder mechanism is provided in the spindle coupling body to supply working fluid from the fluid coupling. By supplying working fluid through the removable fluid coupling while the roll is stopped and holding it as it is, it is possible to eliminate the roll neck play by the press piston while eliminating the need to supply working fluid during operation. This enables high-speed rolling while preventing vibration.

Further, according to the spindle coupling for a rolling mill of the present invention, the spindle coupling main body is provided with a pressure cylinder mechanism and a pressure accumulation mechanism for the working fluid, so that the fluid can be attached and detached while the roll is stopped. By supplying working fluid through the joint and accumulating pressure in the pressure accumulating mechanism, it is possible to eliminate the roll neck play by using the press piston more reliably, while eliminating the need to supply working fluid during operation, thereby preventing vibration. High-speed rolling is possible.

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

[Brief explanation of the drawing]

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

FIG. 2 is a cross-sectional view of an 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 rolling mill spindle coupling of the present invention is applied.

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

[Explanation of symbols]

13, 14 Spindle 15, 16 Spindle coupling 17, 18
Rolls 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 and discharge device 32 Pressure accumulation mechanism

Claims (2)

[Claims] 1. A press cylinder mechanism is provided in a spindle coupling body in which a hollow portion into which a roll neck is inserted is formed, and a press cylinder mechanism is provided with a press piston that presses the roll neck to eliminate looseness during rotation. A spindle coupling for a rolling mill, characterized in that a detachable fluid coupling for supplying and holding working fluid to a cylinder mechanism and discharging it is provided on the outer periphery of the spindle coupling body. 2. The pressure cylinder mechanism according to claim 1, further comprising a pressure accumulating mechanism capable of maintaining a pressurized state of the working fluid supplied between the fluid coupling and the press cylinder mechanism and replenishing the working fluid. rolling mill spindle coupling.