JP2564821Y2 - 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 of the insertion connection type for transmitting a driving torque to a roll of a rolling mill.

[0002]

2. Description of the Related Art Conventionally, a roll of a rolling mill is driven by a driving device through a roll coupling. The roll has its shaft removably inserted into the coupling.

FIGS. 5 and 6 show an example of a conventional roll driving device for a rolling mill. FIG. 6 is VI-VI of FIG.
FIG. 4 is a cross-sectional view as seen from the line.

A conventional roll coupling 1 removably receives a roll shaft 3 of a roll 2 of a rolling mill, and transmits the rotational torque of a motor 4 to the roll shaft 3 via a speed reducer 5 and a spindle 6. The roll 2 is rotatably supported by a roll chock 7.

[0005] The bearing hole of the coupling 1 is formed with a flat side wall 8 which serves as a torque transmitting surface. Roll axis 3
Also, a flat surface 9 is formed corresponding to the flat side wall 8.
This is the torque transmission receiving surface.

[0006] When the roll shaft 3 is inserted into the hole of the coupling 1, as shown in FIG.
A clearance a is provided between the coupling 1 and the flat side wall 8 of the coupling 1. This is for facilitating attachment and detachment of the roll shaft 3 to and from the coupling 1. However, due to the play a, the rotation of the roll 2 fluctuates during rolling, and a defect called chatter mark occurs in the rolled material.

[0007] The fitting of the roll coupling differs depending on the type and size of the rolling mill.
The clearance is about 1 to 0.3 mm. This play gap is further increased due to abrasion caused by the roll attaching / detaching operation, and the chatter mark generation frequency increases when the gap exceeds 0.3 to 0.5 mm.

[0008] An example of a roll coupling in which the play a is provided when the roll shaft 3 is attached and detached and the play a is eliminated during rolling is disclosed in Japanese Utility Model Application Laid-Open No. 58-157206.
No. has been proposed. In this case, a hydraulic chamber is provided in the roll coupling to enable the above operation. In this case, there is a disadvantage that the worker goes to the drive side when the rolls are attached and detached, and has to operate the pressure oil in the hydraulic chamber every time. Occurs.

[0009] In addition, there are disclosed one having an expansion / contraction link mechanism in the coupling (Japanese Utility Model Laid-Open No. 3-51902), one having a hydraulic cylinder unit in the coupling (Japanese Utility Model Application Laid-Open No. 3-9208), and the like. Have been. However, these couplings have a complicated structure and are liable to malfunction.

[0010]

[Problem to be solved by the present invention] The problem to be solved by the present invention is to shorten the time required for changing rolls,
An object of the present invention is to provide a roll coupling device capable of preventing chatter marks from occurring.

[0011]

SUMMARY OF THE INVENTION A roll coupling device according to the present invention is a fitting coupling type roll coupling device for transmitting a driving torque to a roll of a rolling mill. An annular pressure chamber is formed in the portion, and the annular pressure chamber extends at a predetermined width in the axial direction of the coupling outer cylinder portion and completely circles in the circumferential direction of the outer cylinder portion to be independent of the outside. The coupling outer cylinder portion is provided with a check valve to provide communication between the annular pressure chamber and the outside, a multi-sided liner is mounted in the coupling outer cylinder portion, and the pressurized medium is supplied. A roll coupling device, wherein the supply is supplied to the pressure chamber through a check valve, the coupling outer cylinder portion is elastically deformed in a radial direction, and the roll shaft end is tightened by using the liner.

[0012]

In the roll coupling device of the present invention, a conventional clearance is provided when the roll shaft end is inserted into the outer cylindrical portion of the coupling.

Before operating the rolling mill, a pressurized medium is supplied from the outside into an annular pressure chamber provided in the coupling outer cylinder, the inner surface of the outer cylinder is expanded, and the end of the roll shaft is moved through a liner. tighten. This state is maintained.

When the roll is replaced, the pressurized medium in the pressure chamber is released to the outside, so that an initial play space is formed in the coupling, and the end of the roll shaft can be easily removed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a roll coupling device according to the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 2, the roll of the present invention
The coupling device 10 is attached to the tip of the spindle 6 connected to the motor 4 (FIG. 5), and removably receives the roll shaft end 31 of the roll 2 in the coupling outer tube portion 11.

As shown in FIGS. 1 and 2, an annular pressure chamber 111 is formed in the coupling outer cylinder portion 11. A polyhedral liner 12 is mounted on the inner surface of the coupling outer cylinder 11. The bottom of the liner 12 is fixed to the central partition 112 of the coupling outer cylinder 11 by bolts 13.

As shown in FIG. 3, the liner 12 has a quadrilateral (FIG. 3A), hexagonal (FIG. 3B) or other polygonal torque transmitting surface.

As shown in FIG. 2, the auto coupler 21 is mounted on a cylinder 22 and is moved up and down. The auto coupler 21 receives a pressurized medium (for example, pressurized oil or the like) from the pressurized medium source 30.

The pressurized medium source 30 is conventional and
It comprises a pump 31, solenoid valves 32 and 33, and a pilot check valve.

The auto-coupler 21 uses a check valve 113 provided on the coupling outer cylinder portion 11 to pass through the pressure chamber 11.
1 is supplied with a pressurized medium. The pressurized medium expands the outer cylindrical portion of the coupling, and presses the liner 12 against the roll shaft end 31 to eliminate play.

Even if the auto coupler 21 is disconnected from the check valve 113, the pressurized state of the pressure chamber 111 is maintained as it is by the action of the check valve 113.

To change the roll, the auto coupler 21 is operated to perform the reverse operation.

FIG. 4 shows the limit transmission torque when the pressure chamber 111 of the coupling outer cylinder 11 is pressurized. The conditions of the coupling outer cylinder part 11 at this time are as follows.

Outer diameter 486 mm x inner diameter 330 mm x pressure chamber diameter 368 mm x initial clearance 0.32 mm, roll shaft end 30
0 mm.

As a result, the pressure of the pressure chamber 111 is 450 kg.
A transmission torque of 8.2 ton · m was obtained at f / cm ² .

Also, the roll change operation is performed with an initial clearance of 0.3.
2 mm was maintained.

[0028]

According to the present invention, no chatter mark is generated even when the coupling is used for a long period of time. In addition, the replacement period of the spindle can be extended. Furthermore, the roll change can be performed simply and quickly.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of the roll coupling device of the present invention.

FIG. 2 is a transverse sectional view taken along line II-II in FIG.

FIG. 3 is a cross-sectional view showing various shapes of a roll end.

FIG. 4 is a graph showing a relationship between hydraulic chamber pressure and transmission torque.

FIG. 5 is a schematic configuration explanatory view of a conventional roll coupling device.

FIG. 6 is a transverse sectional view taken along line VI-VI in FIG. 5;

[Explanation of symbols]

 10: Roll coupling device 11: Coupling outer cylinder 111: Pressure chamber 12: Liner 13: Bolt 112: Central partition 21: Auto coupler 22: Cylinder 30: Pressurized medium source

Claims (1)

(57) [Scope of request for utility model registration] 1. A fitting coupling type roll coupling device for transmitting a driving torque to a roll of a rolling mill, wherein an annular pressure chamber is formed in a coupling outer cylinder portion receiving a roll shaft end, and the annular pressure chamber is formed. The chamber extends at a predetermined width in the axial direction of the coupling outer cylinder portion and completely circles in the circumferential direction of the outer cylinder portion to form a space independent of the outside, and a check is made in the coupling outer cylinder portion. A valve is provided to allow the annular pressure chamber to communicate with the outside, a polyhedral liner is mounted in the coupling outer cylinder, and a pressurized medium is supplied to the pressure chamber through the check valve. A roll coupling device characterized by elastically deforming a coupling outer cylindrical portion in a radial direction, and tightening the roll shaft end by using the liner.