JPH09276911A - Thrust ring of rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the opening trouble caused by disengagement of a thrust block from a roll neck groove by arranging a mechanical lock device in a thrust ring and pushing the thrust block to the roll neck groove. SOLUTION: The roll 1 in a rolling mill is supported with a chock 2 and the thrust block 7 is engaged with the roll neck groove 6 by hydraulic-driving the thrust ring 5 to prevent the disengagement. Further, the mechanical lock device is arranged in this thrust ring 5, and the thrust block in the condition of engaging with the roll neck groove 6 is pushed to the roll neck groove 6. As this mechanical lock device, e.g. a toggle device for connecting a piston rod 25 energized in the advancing direction of a hydraulic device and the thrust block 7 with a link 24 is used and the thrust block 7 is engaged with the roll neck groove 6 by advancing the piston rod 25. By this constitution, even at the time of leaking the hydraulic oil, the thrust block 7 is self-locked through the link 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thrust ring which is used for clamping a roll and a chock in a rolling mill and which receives a load in the axial direction of a bearing in the chock.

[0002]

2. Description of the Related Art FIG. 7 is a vertical cross-sectional view showing a structure for mounting a thrust ring to a roll. One end surface of the thrust ring is abutted against a bearing 3 in a chock 2 incorporated in the roll 1 to form an annular carrier ring 4 around the roll. Are placed. In order to hold the bearing 3 by restraining the position of the carrier ring 4 in the axial direction, a thrust ring 5 that applies a restraining force to the carrier ring 4 in the axial direction is provided in connection with the carrier ring 4.

The thrust ring 5 is provided with a plurality of thrust blocks 7 which can move in the radial direction of the roll 1 and can be dropped into a roll neck groove 6 formed in the roll 1. The thrust block 7 has a thrust ring 5
Is fixed to the piston rod 9 of the cylinder 8 fixedly disposed at the position, and engages with or separates from the roll neck groove 6 by movement of the piston rod 9 due to supply and discharge of hydraulic oil.

An annular cylinder bore 10 is formed on the thrust block side of the carrier ring 4, and an annular piston 11 that is movable in the roll axis direction and abuts the thrust block 7 is provided in the cylinder bore. The block 7 abuts on the inner peripheral surface of the roll neck groove 6 and applies a restraining force to the carrier ring 4 in the axial direction to press and hold the bearing 3.

8A and 8B are explanatory views of the lock mechanism of the thrust block shown in FIG. 7, where FIG. 8A is a vertical sectional view showing a state before locking, and FIG. 8B is a vertical sectional view showing a locked state. In the figure, the thrust ring 5 is
A lock mechanism for the thrust block 7 is provided in order to maintain the above function. In the lock mechanism, the piston 11 causes the pin rod 12 to project above the thrust block 7 to prevent the thrust block 7 from rising. The pin rod 12 uses the spring 13 to move the thrust block 7
Biased away from

[0006]

Since the thrust ring described above locks the thrust block in direct motion by the hydraulic cylinder, when the hydraulic cylinder leaks hydraulic pressure, it engages with the roll neck groove. There is a concern that the thrust block may be disengaged.

Therefore, the present invention provides a thrust bling having a mechanical lock mechanism for preventing a release trouble due to engagement disengagement of a thrust block from a roll neck groove due to hydraulic leakage during rolling.

[0008]

SUMMARY OF THE INVENTION The present invention is a thrust ring of a rolling mill including a thrust block that is hydraulically driven to engage with a roll neck groove, and the thrust block is in a state in which the thrust block is engaged with the roll neck groove. Provided with a mechanical lock mechanism that presses against the roll neck groove.

The mechanical lock mechanism is a toggle mechanism in which a piston rod biased in the forward direction and a thrust block are connected by a link so that the thrust block engages with the roll neck groove by the forward movement of the piston rod.
Alternatively, a tapered wedge having an inclined surface and a flat surface is provided at the tip of the piston rod biased in the forward direction,
A tapered wedge mechanism is used in which the thrust wedge is arranged so that the thrust block engages with the roll neck groove by advancing the tapered wedge.

[0010]

1 is a longitudinal sectional view of an embodiment in which a toggle mechanism is used as a mechanical lock mechanism of the present invention, and FIG.
1 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a longitudinal sectional view in a state where the lock is released in the embodiment using the toggle mechanism as the mechanical lock mechanism of the present invention.

In FIGS. 1 and 2, the roll 1 is supported by a bearing 3 incorporated in a chock 2, and the chock 2 is integrated with a chock cover 21 that wraps the end portion of the roll 1.

An annular carrier ring 4 that abuts the outer end surface of the bearing 3 is arranged around the roll 1, and a thrust ring 5 that holds the bearing 3 by restraining the axial position of the carrier ring 4 is incorporated. Be done. Thrust ring 5
Is the chock cover 2 with the thrust ring holding pin 14.
The lateral movement is restricted by the thrust ring holding pin groove 15 of No. 1.

The carrier ring 4 has an annular groove 17 for accommodating the annular cylinder 16 of the thrust ring 5 formed on the entire surface of the carrier ring 4 facing the thrust ring 5.
An annular piston 11 is incorporated in the annular cylinder 16 so as to be movable in the roll axis direction. The piston 11 is biased toward the thrust ring side by the spring 22 in the annular cylinder 16.

A plurality of thrust blocks 7 that are movable in the radial direction of the roll 1 and that enter the roll neck groove 6 are arranged on the thrust ring 5 at the same central angle pitch with respect to the central axis of the thrust ring 5. There is. The thrust block 7 has a tapered wedge 2 of the carrier ring 4.
A taper along 3 is formed.

The portion of the thrust block 7 opposite to the roll neck groove 6 is pivotally attached to one end of the link 24,
The other end of 4 is pivotally attached to the piston rod 25 of the piston 11 of the annular cylinder 16, and the piston rod 25
The link slide block 26 is pivotally attached beyond the point. The link slide block 26 is a piston rod 25.
The guide rod 28 of the piston rod 25 slides on the bearing 29 of the thrust ring 5 as the chamber 27 in the thrust ring slides.

In the above-mentioned structure, from the state shown in FIG. 3 in which the thrust ring 5 is connected to the carrier ring 4, the working oil is fed to the annular cylinder 16 to feed the piston 1 to the piston 1.
When 1 is moved forward, the thrust block 7 moves toward the roll neck groove 6 by the pivotal movement of the link 24 pivotally attached to the piston rod 25, and engages with the roll neck groove 6.
As shown in FIG. 1, the lock state is set.

When the thrust block 7 is completely engaged with the roll neck groove 6, the thrust block 7, the link 24, and the link slide block 26 are in a dead center position. Even if a force acts in a direction away from 6, the force acts on the ring slide block 26 from the link 7 and is received by the wall of the chamber 27 of the thrust ring 5 with which the ring slide block 26 is in contact. As a result, thrust block 7
Is blocked from moving and self-locking. Furthermore, since the piston 11 of the cylinder bore 10 is biased by the spring 13, the locked state can be stabilized.

FIG. 4 is a vertical sectional view of an embodiment using a tapered wedge mechanism as the mechanical lock mechanism of the present invention, FIG. 5 is a sectional view taken along the line A--A of FIG. 4, and FIG. 6 is a mechanical lock of the present invention. FIG. 9 is a vertical cross-sectional view showing a state in which a lock is released in an embodiment using a tapered wedge mechanism as a mechanism.

In the figure, as in the above embodiment, an annular carrier ring 4 is provided around the roll 1 so as to abut the outer end surface of the bearing 3 incorporated in the chock 2.
A thrust ring 5 that holds the bearing 3 by restraining the position of the carrier ring 4 in the axial direction is incorporated. The thrust ring 5 is restrained from lateral movement by the thrust ring holding pin 14 and the thrust ring holding pin groove 15 of the chock cover 21.

The thrust ring 5 is provided with a plurality of thrust blocks 7 that are movable in the radial direction of the roll 1 and that enter the roll neck groove 6 at equal center angle pitches. The thrust block 7 has a taper wedge 23 along the taper wedge of the carrier ring 4.

A rod 31 having a roller 30 at its tip is vertically provided on the thrust block 7 on the side opposite to the roll side.

A taper wedge 32 is provided in contact with the roller 30 in a direction perpendicular to the rod 31, and the taper wedge 32 is fixed to the piston rod 35 of the piston 34 of the cylinder 33 and moves forward and backward in the axial direction of the roll. .
The piston 34 is urged by a spring 36 provided inside the cylinder 33 in a direction to advance the tapered wedge 32.

The taper wedge 32 has a taper wedge formed with a flat surface 37 facing the roller 30 from the fixed portion of the piston rod 35 toward the tip side, and a taper surface 38 toward the tip. Has been done. The roller 30 has a flat surface 3 of the tapered wedge 32.
It is biased by a spring 39 so that it is always in contact with 7 and the inclined surface 38.

When the piston 34 is moved forward from the state shown in FIG. 6 in which the thrust ring 5 is connected to the carrier ring 4 in the above structure, the piston rod 35 is moved.
The roller 30 that was in contact with the inclined surface 38 of the tapered wedge 32 fixed to the roller wedge 3 is pushed down in the direction of the roll neck groove 6 as the tapered wedge 32 moves forward,
When 0 reaches the flat surface 37 of the tapered wedge 32,
The thrust block 7 engages with the roll neck groove 6, and the carrier ring 4 is pressed against the bearing 3 by the taper wedge 23 of the thrust block 7 to be in the locked state as shown in FIG.

In this state, when the thrust block 7 tries to move upward, the movement of the roller 30 is blocked by the flat surface 37 of the tapered wedge 3. Further, since the tapered wedge 30 is biased in the forward direction by the spring 36 provided in the cylinder 33, it does not move even if there is a hydraulic leak in the cylinder 33.

[0026]

The mechanical lock function of the toggle mechanism or the tapered wedge mechanism can prevent the opening trouble due to the hydraulic pressure leak.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment using a toggle mechanism as a mechanical lock mechanism of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a vertical cross-sectional view of the unlocked state in the embodiment using the toggle mechanism as the mechanical lock mechanism of the present invention.

FIG. 4 is a vertical sectional view of an embodiment using a tapered wedge mechanism as a mechanical lock mechanism of the present invention.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a longitudinal sectional view showing a state where the lock is released in the embodiment using the tapered wedge mechanism as the mechanical lock mechanism of the present invention.

FIG. 7 is a vertical cross-sectional view showing a conventional structure for attaching a thrust ring to a roll.

8 is an explanatory view of a lock mechanism of the thrust block shown in FIG. 7, FIG. 8 (a) is a vertical sectional view showing a state before locking,
FIG. 8B is a vertical sectional view showing a locked state.

[Explanation of symbols]

 1 Roll 2 Chock 3 Bearing 4 Carrier Ring 5 Thrust Ring 6 Roll Neck Groove 7 Thrust Block 8 Cylinder 9 Piston Rod 10 Cylinder Bore 11 Piston 12 Pin Rod 13 Spring 14 Thrust Ring Retaining Pin 15 Thrust Ring Retaining Pin Groove 16 Annular Cylinder 17 Annular Groove 21 Chock Cover 22 Spring 23 Tapered Wedge 24 Link 25 Piston Rod 26 Link Slide Block 27 Chamber 28 Guide Rod 29 Bearing 30 Roller 31 Rod 32 Tapered Wedge 33 Cylinder 34 Piston 35 Piston Rod 36 Spring 37 Flat Surface 38 Sloping Surface 39 Spring

Claims (3)

[Claims] 1. A thrust ring of a rolling mill, comprising a thrust block that is hydraulically driven to engage with the roll neck groove, and a mechanical device that presses the thrust block into the roll neck groove when the thrust block is engaged with the roll neck groove. Thrust ring of a rolling mill characterized by having a lock mechanism. 2. The mechanical lock mechanism is a toggle mechanism in which a piston rod and a thrust block urged in the forward direction are connected by a link so that the thrust block engages with the roll neck groove by the forward movement of the piston rod. The thrust ring of the rolling mill according to claim 1, wherein: 3. A mechanical lock mechanism is provided with a taper wedge having an inclined surface and a flat surface at the tip of a piston rod biased in the forward direction, and the taper wedge advances the taper wedge to move the thrust block into a roll neck groove. The thrust ring of a rolling mill according to claim 1, wherein the thrust ring mechanism is a tapered wedge mechanism disposed so as to engage with each other.