JP2564765Y2 - Roll coupling device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll coupling device for connecting a rolling roll driving spindle and a rolling roll in a rolling mill.

[0002]

2. Description of the Related Art As shown in FIGS. 2 and 3, in a conventional rolling mill, a rolling roll 2 has a roll shaft end 2a supported by a roll chock 1. As shown in FIG. One shaft end of the drive spindle 4 is detachably fitted and connected by the roll coupling 3. The other shaft end of the drive spindle 4 is
It is connected to the motor 6 through the gear box 5.

In the roll coupling 3, an initial gap G is provided for facilitating the mutual insertion of the shaft end 2a of the rolling roll 2 and the bearing hole 3a of the coupling. However, it is preferable that there be no gap G when transmitting the driving torque.

Therefore, various roll coupling structures for eliminating the gap G during transmission of driving torque have been conventionally proposed. These can be roughly classified into the following two.

[0005] One of them utilizes a taper wedge. Typical examples thereof are described in Japanese Utility Model Publication No. 60-10721, Japanese Utility Model Application Laid-Open No. 58-143007, and Japanese Utility Model Application Laid-Open No. 2-81.
No. 703 and the like. In these couplings, means for moving the taper wedge, that is, although there is a difference in the direction, basically, the gap (play) of the connecting portion is eliminated by using the taper.

[0006] Another method is to provide an actuator operated by hydraulic pressure or the like in a coupling or a roll shaft to eliminate a gap. A typical example is Shokai Sho 5
JP-A-8-157206 and JP-A-3-9208.

In a coupling using a tapered wedge, slippage occurs between the wedges every time the rolling roll is changed, causing wear. In this case, the correction is performed by moving the wedge by an amount corresponding to the amount of wear using a screw, a spring, or the like. However, the amount is limited, and the compensation is small. Further, since the amount of deflection of the spring changes, the effect of the wedge also changes accordingly.

In the coupling disclosed in Japanese Utility Model Application Laid-Open No. 2-81703, if the wedge is worn, the axis of the spindle and the roll is disturbed, and the smooth transmission of power is hindered.

In the coupling disclosed in Japanese Utility Model Publication No. 60-10721, the gap can be eliminated in the short side direction of the roll axis, but not in the long side direction.

[0010] On the other hand, the coupling using an actuator has problems such as high cost and troublesome adjustment when changing rolls.

Particularly, in the coupling disclosed in Japanese Utility Model Laid-Open No. 58-157206, a gap is eliminated by pressurizing a hydraulic chamber provided in a roll coupling to deform the coupling. The amount of deformation cannot be large due to structural restrictions. In addition, time and labor are required for pressurizing and depressurizing.

In the coupling disclosed in Japanese Utility Model Laid-Open Publication No. 3-9208, an actuator is provided inside the roll shaft, so that it is necessary to provide the actuator for all rolls, which is very expensive.

[0013]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a roll coupling device which is always stable and eliminates gaps, does not cause wear, and has an aligning property with a spindle.

[0014]

The roll coupling device according to the present invention is detachably fitted and connected to a shaft end of a rolling roll of a rolling mill, and is fixedly connected to a shaft end of a driving spindle to form a roll coupling device. A roll coupling device for transmitting torque from a drive spindle, comprising: a pair of short sides and a pair of long sides of a substantially rectangular bearing hole for receiving a shaft end of a rolling roll provided in a coupling body; By means formed by each inner wall using a piston that moves back and forth by fluid pressure, each piston is connected to a fluid pressure supply system, and the shaft end of the rolling roll is selectively gripped by each piston. The above-mentioned problem has been solved.

[0015]

The piston is provided on each of the pair of short sides and long sides of the rectangular bearing hole of the coupling, so that the pair of short sides and long sides of the corresponding shape of the shaft end of the rolling roll are respectively gripped. , The gap can be eliminated. During the transmission of the driving torque, when the gripping force decreases, the fluid pressure may be increased.

When the roll is changed, the fluid pressure for operating the piston is increased or decreased to control the gripping force of the piston and to open and close the gap.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The roll coupling device 30 of the present invention comprises:
As shown in FIGS. 1 and 2, the shaft end 2 of the rolling roll 2 of the rolling mill
a and is fixedly connected to the shaft end of the drive spindle 4 to transmit the torque 7 from the drive spindle 4 to the rolling roll 2.

The roll coupling device 30 of the present invention
Is a coupling body 31 as shown in FIGS.
A pair of short sides 321 and a pair of long sides 3 of a substantially rectangular bearing hole 32 for receiving the shaft end of the rolling roll 2 provided at
22, each inner wall is formed by a piston 11 moving back and forth by fluid pressure, and each piston 11 is connected to a fluid pressure supply system 4.
0, and the shaft end 2a of the rolling roll 2 is connected to each piston 11
To selectively grip.

Referring to FIG. 4, a more detailed description of the roll coupling device 30 will be given. For the roll change, a new rolling roll 2 is inserted into the mill stand, and the roll end 2a is mounted in the bearing hole 32 of the coupling body 31 of the roll.

At this time, gaps C and C 'are provided for smooth mounting. That is, the shaft end 2
First, gaps C and C ′ are respectively set between the long side and the short side of “a” and the long side and the short side of the bearing hole 32.

A liner 8 is fixed to the outer surface of each piston 11 by bolts 10. The inner surface of the piston 11 faces the pressure chamber 19 and the spring 15
1 receives a biasing force on the pressure chamber 19 side.

The pressure chamber 19 communicates with the passage 13 and is closed by the stopper 14. In addition, a conventional seal 12 is provided at an appropriate position on the sliding surface of each component to prevent leakage of the pressure fluid.

The fluid pressure supply system 40 will be described with reference to FIGS. The fluid pressure supply system 40 includes quick joints 41 and 42, a pressure gauge 43, a pressure fluid source 44, and a conduit 45. The passage 13 provided in the coupling body 31 is provided with each of the conduits 431 and 432 and the nipple 43.
3, 434 and the conduit 45 are connected to the quick joints 41, 42, respectively.

After the roll change is completed and the piston is operated, the fluid supply system 40 is disconnected from the quick joints 41 and 42, and thereafter the gap between the roll shaft end 2a and the gap is maintained at zero only by the internal pressure. If it is difficult to maintain the internal pressure, the problem can be solved by providing a pressurizing pump or an accumulator (not shown) on the spindle 4. The short side 321 and long side 322 of the bearing hole 32 are separately connected to conduits 431 and 432 and nipples 433 and 434, respectively. This is because the piston 11 on each side
In order to be able to move symmetrically in pairs.

The pressure gauge 43 is used to monitor the piston operating pressure, that is, the grip force of the roll shaft end 2a. If the pressure gauge 43 alone is not enough, the piston 1
1, a position detector (not shown) may be attached to directly monitor the movement of the piston. The description of the pressure fluid source 44 is omitted since it is known.

In the present invention, a conventional feed screw mechanism, a link mechanism, or the like may be used instead of the fluid pressure supply system 40.

[0027]

[Effects of the Invention] According to the present invention, there is no backlash (gap) of the roll coupling during operation, the quality of the rolled material is improved, the maintenance of the coupling is easily inspected, and the roll can be changed. Safety can be done quickly.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of a roll coupling device of the present invention.

FIG. 2 is a front view of a conventional rolling mill to which the roll coupling of the present invention is applied.

FIG. 3 is a transverse sectional view taken along line III-III in FIG. 2;

FIG. 4 is a cross-sectional view of the roll coupling of the present invention corresponding to FIG.

FIG. 5 is a longitudinal sectional view of the roll coupling of the present invention.

[Explanation of symbols]

2: Roll roll, 3: Roll coupling, 4: Spindle, 2a: Roll shaft end, 30: Roll coupling device, 31: Coupling body, 32: Bearing hole, 32
1: short side, 322: long side, 11: piston.

Claims (1)

(57) [Scope of request for utility model registration] 1. A roll coupling device, which is detachably fitted and connected to a shaft end of a rolling roll of a rolling mill and fixedly connected to a shaft end of a driving spindle to transmit torque from the driving spindle to the rolling roll. A pair of short sides and a pair of long sides of a substantially rectangular bearing hole for receiving a shaft end of a rolling roll provided in the coupling body are formed by each inner wall using a piston which moves back and forth by fluid pressure, A roll coupling device, wherein each piston is connected to a fluid pressure supply system, and a shaft end of the rolling roll is selectively gripped by each piston.