JPH07223005A - Device and method for fixing rolling roll and chock - Google Patents

Abstract

PURPOSE:To easily attach and detach a rolling roll and a chock. CONSTITUTION:The free end part 32a of a thrust stopper 32 is engaged to the annularly grooved part 25 of a roll shaft 22 which is abutted on an abutting part 32b. The rocking displacement is executed by taking the center of a rocking shaft 31 as a fulcrum and the rocking shaft 31 is supported by an outer sliding ring 33 having a slope. The thrust force which is generated in the abutting part 32b is transmitted from the outer sliding ring 33, wedge member 34 and inner small ring 35 to an inner race 29 through the rocking shaft 31 and supported by the chock 26. As shown in the under half part, when a stopper ring 38 is forced into and the thrust stopper 32 is outward rocking displaced, the outer sliding ring 33 and inner sliding ring 35 can be attached and detached and further the chock 26 can be attached and detached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a fixing method for fixing a rolling mill roll used in various rolling mills and a chock rotatably supporting the rolling mill roll.

[0002]

2. Description of the Related Art Rolls used in various rolling mills are rotatably supported by a supporting member called a chock having a bearing built therein, and a rolling load is applied thereto. In a rolling mill, various rolls are used when rolling various products. Also, the rolls are often scratched and worn, and are frequently replaced. Since the chock is shared, the work of changing the rolling mill roll and the chock is often performed every time the roll is replaced. Therefore, for fixing the rolling mill roll and the chock, it is desired to facilitate the reassembling work.

FIG. 4 shows a typical prior art for fixing a rolling mill roll to a chock. The roll shaft 2 of the rolling mill roll 1 is provided with a roll inwardly in the direction of the axis 3, and a neck portion 4 is formed outwardly. Further, an annular groove 5 is formed at the outer end in the axial direction. A chock 6 is extrapolated to the roll shaft 2. Rotating bearings 7 and 8 are provided in the chock 6. The inner bearing 7 mainly bears the radial force perpendicular to the axis 3, and the outer bearing 8 mainly bears the thrust force parallel to the axis 3. The outer bearing 8 includes an inner ring 9 rotating with the roll shaft 2 and an outer ring 10 stationary with the casing of the chock 6. The chock 6 is provided with a bearing 8 and an axis 3 of the roll shaft 2.
It is fixed relative to the direction.

A screw portion 13 is formed on the inner peripheral portion of the nut ring 12 outside the axis 3. By the screw part 13,
The distance between the annular groove 5 and the inner ring 9 is adjusted. The nut ring 12 is constrained from displacement around the axis 3 with respect to the roll shaft 2 by the detent 14, and only sliding displacement in a direction parallel to the axis 3 is allowed. Threaded portion 13 of nut ring 12
Are joined by a threaded portion on the outer peripheral portion of the screw ring 15. The screw ring 15 is provided with a rotation stopper 16,
Rotational displacement is prevented with respect to the thrust ring 17 fitted in the annular groove portion 5. The thrust ring 17 is prevented from being rotationally displaced with respect to the roll shaft 2 by the rotation stopper 18. That is, the chock 6 is the thrust ring 17
Is fixed by the screw ring 15 and the nut ring 12 via the bearing 8 which is pressed and fixed inward of the axis 3.

FIG. 5 shows the structure of the thrust ring 17. The thrust ring 17 has two parts 17a and 17b.
It is formed by being divided into two parts and is joined at one place by a pin 19. It is connected by a fastening bolt 20 at a position facing the pin 19 to form an annular thrust ring 17.

In the above prior art for fixing the rolling mill roll and the chock, when the chock 6 is pulled out, the detent 16 with the thrust ring 17 is removed and the screw ring 15 is moved inward of the axis 3. And loosen, remove the thrust ring fastening bolts 20 to pull out the thrust ring 17, pull out from the roll shaft 2 while keeping the nut ring 12 and the screw ring 15 connected by the screw portion 13, and pull out the chock 6. Done in. When inserting the chock 6, perform the procedure in the reverse order of pulling out.

Another prior art for fixing the rolling mill roll and the chock is disclosed, for example, in Japanese Utility Model Laid-Open No. 5-53707. This prior art discloses a configuration in which one-touch automatic and mechanical replacement is possible with the aim of reducing the work time for changing the chocks.

[0008]

In the prior art shown in FIGS. 4 and 5, loosening or tightening work of the screw ring 15, alignment and mounting and removing work for mounting the detent 16 with the thrust ring 17, and Removal of the fastening bolts 20 of the thrust ring 17 and removal of the thrust ring 17 performed while hanging with a crane or the like, or the installation and removal of the set that combines the nut ring 12 and the screw ring 15 with a crane etc. are all manual work. Becomes These operations are a major obstacle to labor saving and automation of the roll shop that changes the rolling mill rolls.

In the prior art of Japanese Utility Model Laid-Open No. 5-53707, it is necessary to displace the fixing mechanism in the radial direction of the roll shaft for attachment and detachment, so that the attaching and detaching work is difficult.

An object of the present invention is to provide a fixing device and a fixing method for a rolling mill roll and a chock in which axial fixing of the rolling mill roll and the chock can be performed with a simple structure, and the chock can be easily attached and detached. Is.

[0011]

SUMMARY OF THE INVENTION The present invention is an apparatus for externally fixing and fixing a chock containing a bearing to a shaft of a rolling mill roll having an annular groove formed at an end of the shaft. It is movably inserted and has a substantially cylindrical shape, and the tip end is inward in the axial direction and comes into contact with the inner ring of the bearing built into the chock, and the base end is inward in the axial direction rather than the annular groove portion. Is provided so as to extend outward in the axial direction of the roll shaft from a fulcrum provided at the base end of the slide ring, and can be oscillated and displaced in a plane including the axis of the roll shaft. When the free end portion is brought close to the axis of the roll shaft, the free end portion engages with the annular groove portion of the roll shaft, and in this engaged state, a thrust stopper that fixes the roll shaft and the chock via the slide ring. The roll shaft is located outside the thrust stopper. Is slidable along the axial direction, the thrust stopper is urged outward in the axial direction to hold the thrust stopper in the engaged state with the annular groove portion, and when the thrust stopper is moved inward in the axial direction, the thrust stopper moves toward the annular groove portion. Is a fixing device for a rolling mill roll and a chock, which includes a stopper ring that enables swinging displacement for releasing the engagement state.

Further, the sliding ring of the present invention is divided into an outer ring arranged axially outward of the roll shaft and an inner ring arranged axially inward, and the outer ring and the inner ring are opposed to each other. A wedge-shaped space is formed between the end faces that extend outward in the radial direction of the roll shaft, and the stopper ring is displaced outward in the axial direction of the roll shaft in conjunction with the sliding displacement of the stopper ring. In this case, a wedge member is included that is pushed into the wedge-shaped space and presses so as to widen the distance between the inner ring and the outer ring.

Further, according to the present invention, in a method of externally fixing a chock containing a bearing to a shaft of a rolling mill roll having an annular groove formed at the shaft end, the tip of the chock is located inward in the axial direction of the roll shaft. Abuts the inner ring of the bearing built into
From the fulcrum provided at the base end of the sliding ring, insert a roughly cylindrical sliding ring into the shaft of the rolling mill so that the base end is axially inward of the annular groove. It is provided so as to extend outward in the axial direction of the roll shaft, can be oscillated and displaced in a plane including the axis of the roll shaft, and when the free end is brought close to the axis of the roll shaft, the free end is The thrust ring engaging the free end portion of the thrust stopper engaged with the annular groove portion is disposed on the outer side of the thrust stopper, and the thrust ring capable of sliding displacement along the axis of the roll shaft is
A method of fixing a rolling mill roll and a chock, characterized in that the thrust stopper is biased outward in the axial direction to hold the thrust stopper in an engaged state with the engaging groove portion.

[0014]

According to the present invention, the free end portion of the thrust stopper is engaged with the annular groove portion formed at the shaft end of the rolling mill roll. The thrust stopper is capable of swinging displacement in a plane including the axis about a fulcrum provided at a base end of a sliding ring provided inward in the axial direction of the rolling mill roll.
The tip of the sliding ring contacts the inner ring of the bearing built in the chock inward in the axial direction. Therefore, the chock is fixed to the roll shaft with the free end of the thrust stopper engaged with the annular groove. Further, by swinging the thrust stopper to release the engagement between the free end and the annular groove of the roll shaft, the sliding ring can be easily pulled out in the axial direction of the roll shaft. The chock can be pulled out from the roll shaft. In the state where the thrust stopper is engaged with the annular groove portion, the outer peripheral portion of the thrust stopper is pressed by the stopper ring and the engaged state is maintained. Thus, even if the roll shaft rotates, the engagement between the thrust stopper and the annular groove is not undesirably released due to centrifugal force or the like.

Also according to the invention, the sliding ring is divided into an axially outer outer ring and an inner inner ring. Between the end faces where the outer ring and the inner ring face each other,
A wedge-shaped space is formed that has an interval that widens radially outward of the roll axis. In this wedge-shaped space, when the stopper ring is displaced outward in the axial direction of the roll shaft in conjunction with the sliding displacement of the stopper ring, it is pushed into the wedge-shaped space and the gap between the inner ring and the outer ring is The expanding wedge member fits. As a result, the length of the sliding ring can be adjusted and the bearing can be kept in a state of being constantly pressed against the annular groove portion, and as a result, the chock is fixed to the roll shaft.

Further, according to the present invention, due to the swing displacement of the thrust ring, the free end of the thrust ring engages with the annular groove of the roll shaft in a fixed state, and the free end of the sliding ring moves away from the annular groove. It is possible to easily switch between the state in which the roller is slidable with respect to the roll shaft in the axial direction by moving the sliding ring pressed outward by the spring inward. Further, since the chock can be attached / detached only by moving in the axial direction, the structure of the attaching / detaching device is simplified and can be easily realized.

[0017]

1 shows a longitudinal section of an essential part of an embodiment of the present invention, FIG. 2 shows a right side surface of FIG. 1, and FIG. 3 shows an enlarged section of a further main part of FIG. The upper half of FIG. 1 shows a locked state, and the lower half shows an open state. The structure and operation of this embodiment will be described below with reference to these drawings.

On the roll shaft 22 of the rolling mill roll 21, a neck portion 24 is formed from the inside to the outside in the direction of the axis 23, and an annular groove portion 25 is formed near the outermost end. A chock 26 is externally inserted into the neck portion 24, and the chock 26 that rotatably supports the roll shaft 22 includes an inner bearing 27 that mainly receives a radial force and an outer bearing 28 that mainly receives a thrust force. Be done. The outer bearing 28 includes an inner ring 29 and an outer ring 30.

In the annular groove 25, the swing shaft 3 as a fulcrum is provided.
The free end portion 32a of the thrust stopper 32, which is swingable and displaceable in the plane including the axis 23 around the axis 1, is fitted into the thrust stopper 32 and abuts on the abutting portion 32b. The swing shaft 31 is supported by an outer sliding ring 33 that is slidable in the direction of the axis 23. A wedge member 34 is provided inward of the axis line 23 of the outer sliding ring 33. An inner slide ring 35 is provided slidably in the direction of the axis 23 from the wedge member 34 and further inward of the axis 23. The end surfaces of the outer sliding ring 33 and the inner sliding ring 35 that face each other are inclined surfaces, and a slope is provided between the end surfaces so as to expand radially outward, forming a wedge-shaped space. A spring 47 is provided in the inner sliding ring 35.
A pin 46 that is pressed by is provided, and by pressing the end surface portion of the outer sliding ring 33, the wedge-shaped space is always held in a direction in which it expands. The inner sliding ring 35 presses the inner ring 29 inward in the direction of the axis 23. Inner ring 29
Further presses the roll stepped portion 36 of the roll shaft 22 via the spacer 37 inside the neck portion 24. In such a path from the thrust stopper 32 to the inner ring 29,
The thrust force generated in the rolling mill roll 21 is
6 and is supported from the outside of the chock 26.

A stopper ring 38 is provided outside the wedge member 34. The stopper ring 38 is spring-biased and pressed outward of the axis 23 by a built-in spring 39, and the outer sliding ring 33 and the inner sliding ring 35
It is slidably displaced by being guided by the outer peripheral surface of the. The displacement of the thrust stopper 32 in the direction perpendicular to the axis 23 is pressed by the spring 41. However, the spring force of the spring 41 is relatively soft. Stopper ring 38
In the state in which is pushed by the spring 39, the wedge member 34 is pressed inward in the radial direction by the taper formed on the inner circumference of the stopper ring 38. In the wedge member 34, a pressing pin 43 is pressed by the spring 42.
Is provided, and the tip of the pressing pin 43 presses the flat portion of the inner sliding ring 35. The wedge member 34 is the outer sliding ring 3
3 and the inner sliding ring 35 are fitted into a wedge-shaped space formed between the opposing end surfaces of the inner sliding ring 35, and are pressed to expand the gap between the outer sliding ring 34 and the inner sliding ring 35, thereby making rattling. lose.

The outer end 38a of the axis 23 of the stopper ring 38, in the state of the upper half of FIG. 1, presses the thrust stopper 32 against the axis 23 inward in the radial direction from the outside of the fulcrum. The state where the free end portion 32a of the thrust stopper 32 is engaged with the annular groove portion 25 is maintained. The stopper ring 38 is provided with a hook 44 so that the outer sliding ring 3
Abutting on the outer end face of 3. A cover 45 is provided outside the stopper ring 38 and is fixed to the chock 26.

In the open state as shown in the lower half of FIG. 1, the stopper ring 38 is moved from the outside of the axis 23 to the roll stepped portion 3.
It is realized by pressing in the direction of 6 and contracting the spring 39. When the stopper ring 38 slides and displaces inwardly of the axis 23, the contact portion of the tapered portion A formed on the inner peripheral surface of the stopper ring 38 with the wedge member 34 displaces in a direction away from each other. Therefore, the wedge member 34 is displaced radially outward by the pressing force of the pressing pin 43 by the spring 42, and the inclined surfaces facing each other between the outer sliding ring 33 and the inner sliding ring 35 and the surface of the wedge member 34. There is a gap between them. When the stopper ring 38 is pushed inward by S, the hook 44 pushes the outer sliding ring 33 inward in the direction of the axis 23, and the outer sliding ring 33 corresponds to the gap generated between the wedge ring 34 and the outer sliding ring 33. Sliding inward by the distance δ. In this state, the thrust stopper 32 is attached to the annular groove 25.
A gap d is formed in the contact portion 32b of the portion that is engaged with the thrust stopper 32, and the thrust stopper 32 can be swingably displaced outward in the radial direction around the swing shaft 31. Although the thrust stopper 32 is oscillated and displaced outward in the radial direction by the spring 41, the spring force of the spring 41 is kept relatively weak and soft, so that the thrust stopper 32 is slightly weakened as shown by the chain double-dashed line. The swing displacement in the radial direction can be generated simply by applying a force.
In such a state of the two-dot chain line, the thrust stopper 32,
Outer sliding ring 33, wedge member 34, inner sliding ring 35
The stopper ring 38 can be easily attached and detached to the outside of the axis line 23, and these members are removed by the cover 45 after being removed from the roll shaft 22.
Held at 6. Therefore, the chock 26 and the above-mentioned members can be attached and detached at the same time. Axis 23 of inner sliding ring 35
Since the taper is formed on the inner end surface in the direction, there is a centering action when the roll shaft 22 is attached to and detached from the roll shaft 22, which facilitates the work.

According to this embodiment, in the locked state, the tip end portion 38a of the stopper ring 38 pushes the outer side of the axial line 23 and the outer side in the radial direction from the fulcrum of the center of the swing shaft 31 of the thrust stopper 32. Therefore, even if the roll shaft 22 rotates, the thrust stopper 32 is prevented from swinging outward due to centrifugal force. The swinging displacement of the thrust stopper 32 outward in the radial direction can be performed as a series of operations after the operation of inserting the tool from the outside of the axis 23 and moving the stopper ring 38 inward. The locked state is automatically maintained by each spring 39, 41, 42, 47. In this embodiment, the number of components is relatively small, and since it does not spread outward in the radial direction,
The reliable fixing device can be constructed in a small size. In addition,
The outer sliding ring 33 and the like may be provided at one place to prevent the rolling roll 21 from rotating.

Further, in FIG. 2, the thrust stopper 32
Are provided at six locations in the circumferential direction of the roll shaft 22, but other numbers such as four locations or eight locations may be used. Also,
Although the spacer 37 is provided between the roll stepped portion 36 and the inner ring 29, the spacer 37 may directly contact the inner ring 29 depending on the shape of the roll stepped portion 36.

[0025]

As described above, according to the present invention, it is possible to easily switch the fixed state and the slidable state of the sliding ring by the swing displacement of the thrust stopper. By making the sliding ring slidable and pulling it out from the roll shaft of the rolling mill, the chock can be easily attached and detached, and by providing a cover as in the present embodiment and holding the sliding ring when detached, It is possible to easily attach and detach the sliding ring at the same time.

Further, according to the present invention, since the length of the sliding ring is automatically adjusted with respect to the change in the width of the bearing to be pressed and the position of the annular groove portion, it is possible to easily change The chocks can be easily fixed.

Further, according to the present invention, the thrust stopper can be oscillated and displaced simply by moving the tool in the axial direction of the roll shaft to easily pull out the sliding ring and easily pull out the chock from the roll shaft. it can.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part of an embodiment of the present invention.

FIG. 2 is a right side view of the embodiment of FIG.

3 is an enlarged cross-sectional view showing a configuration related to an outer sliding ring 33, a wedge member 34, an inner sliding ring 35 and a stopper ring 38 of the embodiment of FIG.

FIG. 4 is a sectional view of a main part of a conventional fixing device.

5 is a front view of the thrust ring 17 of FIG.

[Explanation of symbols]

 21 rolling mill roll 22 roll shaft 23 axis line 24 neck portion 25 annular groove portion 26 chock 27, 28 bearing 29 inner ring 31 swinging shaft 32 thrust stopper 32a free end portion 32b contact portion 33 outer sliding ring 34 wedge member 35 inner sliding Ring 38 Stopper ring 39, 41, 42, 47 Spring 44 Hook

Claims (3)

[Claims] 1. A device for externally fixing a chock containing a bearing to a shaft of a rolling mill roll, the shaft end of which is provided with an annular groove, which is slidably fitted on the shaft of the rolling mill roll, A cylindrically shaped sliding ring in which the tip end contacts the inner ring of the bearing built into the chock inward in the axial direction and the base end part is axially inward of the annular groove. , Is provided so as to extend outward in the axial direction of the roll shaft from a fulcrum provided at the base end of the sliding ring, and is swingably displaceable within a plane including the axis of the roll shaft. When brought close to the axis, the free end engages with the annular groove of the roll shaft, and in this engaged state, the thrust stopper that fixes the roll shaft and the chock via the slide ring is placed outside the thrust stopper. Can be slidably displaced along the axis of the roll shaft Yes, in order to release the thrust stopper from the engagement state with the annular groove when it is urged outward in the axial direction to hold the thrust stopper in the engagement state with the annular groove and is pressed and moved inward in the axial direction. A rolling mill roll and chock fixing device, which includes a stopper ring capable of swinging and displacing. 2. The sliding ring is divided into an outer ring arranged axially outward of the roll shaft and an inner ring arranged axially inward, and the end faces of the outer ring and the inner ring facing each other. A wedge-shaped space is formed between the roll shaft and the space that expands radially outward, and when the stopper ring is displaced outward in the axial direction of the roll shaft in conjunction with the sliding displacement of the stopper ring. The rolling mill roll and chock fixing device according to claim 1, further comprising a wedge member that is pushed into the wedge-shaped space and presses the inner ring and the outer ring so as to widen a gap between the inner ring and the outer ring. 3. A method of externally fixing a chock containing a bearing to a shaft of a rolling mill roll having an annular groove formed at the shaft end, wherein the tip part is built in the chock axially inward of the roll shaft. The inner ring of the bearing, and a roughly cylindrical slide ring is inserted into the shaft of the rolling mill so that the base end is axially inward of the annular groove. It is provided so as to extend outward in the axial direction of the roll shaft from a fulcrum provided at the base end, can be oscillated and displaced in a plane including the axis of the roll shaft, and the free end is brought close to the axis of the roll shaft. At this time, the free end of the thrust stopper engages with the annular groove of the roll shaft.The free end of the thrust stopper engages with the annular groove, and the thrust stopper is located outside the thrust stopper and is slidable along the axis of the roll shaft. Thrust the ring by urging it axially outward. A method for fixing a rolling mill roll and a chock, characterized in that the topper is held in an engaged state with the engaging groove portion.