CN218310012U - Centering device for bar mill roller - Google Patents
Centering device for bar mill roller Download PDFInfo
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- CN218310012U CN218310012U CN202222761643.0U CN202222761643U CN218310012U CN 218310012 U CN218310012 U CN 218310012U CN 202222761643 U CN202222761643 U CN 202222761643U CN 218310012 U CN218310012 U CN 218310012U
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- sleeve
- centering
- roller
- inclined surface
- flat
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Abstract
The utility model belongs to the technical field of bar mill transmission auxiliary assembly, especially, relate to a bar mill centring means for roll, including flat cover, flat cover one end is equipped with the through-hole, and the through-hole has worn to connect centering cover, and the one end of centering cover cross-under through-hole is equipped with outer screw thread, and centering cover has locknut through outer screw thread spiro union, and the centering cover other end is equipped with the inclined plane sleeve, and the inclined plane sleeve has cup jointed the roll. The device is convenient to install and disassemble, the centering sleeve is prevented from falling off in the using process, labor is saved during maintenance, labor intensity is low, fire is not required to be started, potential safety hazards are eliminated, and maintenance time is saved.
Description
Technical Field
The utility model belongs to the technical field of the rod mill auxiliary assembly, especially, relate to a rod mill centring means for roll.
Background
The flat sleeve and the centering sleeve of the bar mill in the prior art are connected with the flat head of the roller in an interference fit mode, the connection mode can effectively play a stabilizing role, but the interference magnitude is not well mastered, the problem that the centering sleeve is separated can occur, meanwhile, the impact force of the bar mill in the rotation process is large, the centering sleeve is gradually abraded in the use process, the abrasion is more serious the longer the bar mill is, the unstable state of the roller finally occurs, at the moment, the centering sleeve needs to be replaced, but the centering sleeve is difficult to detach on line due to the interference fit mode, at present, electric welding destructive cutting and offline destructive replacement modes are mostly adopted, the replacement modes not only waste time and labor, but also delay normal production, occupy a large amount of manpower, and the movable fire in some workshops also has potential safety hazards causing fire, so that the development of the centering device for the bar mill, which can be conveniently detached, is a problem which needs to be solved at present.
The patent number is CN103272849A, the patent name is a centering device provided by the roller centering device of the hot rolling strip mill and the assembling method thereof, the centering sleeve is prevented from being separated in a stop screw or metal welding spot mode, the patent still adopts an interference fit mode, the problem of difficult disassembly still exists, the separation is prevented by the stop screw and the metal welding spot, the randomness is too large, the influence on the material of the stop screw and the quality of the welding spot is large, and the problem of abrasion of a centering hole exists.
Patent CN202045148U discloses a roughing mill flat head sleeve, which is positioned by an outer centering ring, an inner centering ring, a pressure plate and a centering sleeve, and has high roller replacing efficiency, but the centering sleeve cannot be prevented from falling off.
Disclosure of Invention
An object of the utility model is to provide a rod rolling mill centring means for roll that can conveniently dismantle prevents that the centering sleeve from deviating from, shortens repair time, guarantees the normal operating of workshop production.
The utility model provides a technical scheme that its technical problem adopted is: the centering device for the roller of the bar mill comprises a flat sleeve, wherein a through hole is formed in one end of the flat sleeve, a centering sleeve penetrates through the through hole, an outer thread is arranged at one end of the centering sleeve penetrating through the through hole, a locking nut is screwed through the outer thread through the centering sleeve, an inclined surface sleeve is arranged at the other end of the centering sleeve, and the roller is sleeved on the inclined surface sleeve.
Furthermore, one end of the roller is provided with a roller end, the roller is connected with an inclined surface sleeve through the roller end, the inner shape of the inclined surface sleeve of the centering sleeve corresponds to the shape of the roller end and is used for clamping the roller end, and the outer wall of the inclined surface sleeve is an inclined surface.
Furthermore, the inner wall of the flat sleeve is sleeved with a roller to prevent the roller from swinging, and the matched surface of the flat sleeve and the inclined sleeve is an inclined surface to clamp the centering sleeve to prevent the centering sleeve from falling off.
Furthermore, the included angle between the matching surface of the flat sleeve and the inclined sleeve and the central axis of the centering device for the roller of the bar mill is alpha, the static friction coefficient of the flat sleeve and the centering sleeve is mu, and the requirement that tan alpha is less than mu is met, so that the centering device for the roller of the bar mill can work stably.
Furthermore, the inclined sleeve is provided with a centering sleeve shaft shoulder, and a gap is reserved between the centering sleeve shaft shoulder and the flat sleeve after the locking nut is locked so as to provide certain pretightening force for the centering sleeve.
The utility model discloses following beneficial effect has:
1. labor is saved, maintenance labor intensity is low, 7-8 persons are needed for lifting and disassembling the equipment when the centering sleeve is replaced originally, and only 1-2 persons are needed for online operation after the device is used.
2. The centering sleeve is replaced without destroying other parts, and the flat sleeve and the roller are prevented from being damaged in the dismounting process.
3. Fire is not required to be started, and potential safety hazards are avoided.
4. Practice thrift repair time, originally dismantle, the time spent 1h of installation, only need 10min after using this device can dismantle, change on line, reduced the influence of maintenance to the production progress.
5. The centering sleeve is prevented from falling off in the use process.
Drawings
Fig. 1 is a sectional view of the internal structure of the present invention.
Fig. 2 is a partially enlarged view of a in fig. 1.
Wherein: 1. flattening the sleeve; 2. a centering sleeve; 3. external thread; 4. locking the nut; 5. a roll end; 6. a centering sleeve shaft shoulder; 7. a through hole; 8. rolling; 9. a beveled sleeve.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-2, a centering device for a rod mill roller comprises a flat sleeve 1, wherein one end of the flat sleeve 1 is provided with a through hole 7, the through hole 7 is connected with a centering sleeve 2 in a penetrating manner, one end of the centering sleeve 2 connected with the through hole 7 in a penetrating manner is provided with an outer thread 3, the centering sleeve 2 is connected with a locking nut 4 through the outer thread 3, the other end of the centering sleeve 2 is provided with an inclined sleeve 9, and the inclined sleeve 9 is sleeved with a roller 8. One end of the roller 8 is provided with a roller end 5, the roller 8 is connected with an inclined surface sleeve 9 through the roller end 5, the inner shape of the inclined surface sleeve 9 of the centering sleeve 2 corresponds to the shape of the roller end 5 and is used for clamping the roller end 5, and the outer wall of the inclined surface sleeve 9 is an inclined surface. The inner wall of the flat sleeve 1 is sleeved with a roller 8 to prevent the roller 8 from swinging, and the matched surface of the flat sleeve 1 and the inclined surface sleeve 9 is an inclined surface to clamp the centering sleeve 2 to prevent the centering sleeve from falling off.
The included angle between the matching surfaces of the flat sleeve 1 and the inclined sleeve 9 and the central axis of the centering device for the roller of the bar mill is alpha, the static friction coefficient of the flat sleeve 1 and the centering sleeve 2 is mu, and the requirement that tan alpha is less than mu is met, so that the centering device for the roller of the bar mill can work stably. The inclined sleeve 9 is provided with a centering sleeve shaft shoulder 6, and a gap is reserved between the centering sleeve shaft shoulder 6 and the flat sleeve 1 after the locking nut 4 is locked so as to provide a certain pretightening force for the centering sleeve 2.
The utility model provides a centering device for bar mill roll's theory of operation is: penetrate flat cover 1's through-hole 7 with centering sleeve 2 to lock through lock nut 4, guarantee that inclined plane sleeve 9 and flat cover 1 cooperation inclined plane are perfect to be cooperated, guarantee to have the clearance between centering sleeve shaft shoulder 6 and the flat cover 1, peg graft into inclined plane sleeve 9 with roll end 5, open lock nut 4 during the change, separate flat cover 1 and centering sleeve 2, change centering sleeve 2.
The centering sleeve is mainly acted by the radial force of the roller 8 in the using process, the force reflected by the matching inclined surfaces of the flat sleeve 1 and the centering sleeve 2 is equal to the force, the force is set as F, the force is decomposed into a force Fcos alpha perpendicular to the matching inclined surfaces, a force Fsin alpha parallel to the matching inclined surfaces and a static friction force Fsin alpha mu between the matching inclined surfaces, in order to ensure the stability in the using process, the condition that Fsin alpha < F > cos alpha mu is required, and tan alpha < mu is obtained after conversion is achieved, so that the precondition that the centering sleeve is stably used.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Under the prerequisite that does not deviate from the design concept of the utility model, the ordinary person in the art should fall into the protection scope of the utility model to the various changes and improvements that the technical scheme of the utility model made.
The technology, shape and construction parts which are not described in detail in the present invention are all known technology.
Claims (5)
1. A centering device for a rod mill roller is characterized in that: the roll centering device comprises a flat sleeve, wherein a through hole is formed in one end of the flat sleeve, a centering sleeve penetrates through the through hole, an external thread is arranged at one end of the centering sleeve penetrating through the through hole, a locking nut is screwed into the centering sleeve through the external thread, an inclined surface sleeve is arranged at the other end of the centering sleeve, and a roll is sleeved on the inclined surface sleeve.
2. The centering device for a roll of a bar mill according to claim 1, characterized in that: one end of the roller is provided with a roller end head, the roller is connected with an inclined surface sleeve through the roller end head, the inner shape of the inclined surface sleeve of the centering sleeve corresponds to the shape of the roller end head and is used for clamping the roller end head, and the outer wall of the inclined surface sleeve is an inclined surface.
3. The centering device for a roll of a bar mill according to claim 2, characterized in that: the inner wall of the flat sleeve is sleeved with a roller to prevent the roller from swinging, and the surface of the flat sleeve matched with the inclined sleeve is an inclined surface to clamp the centering sleeve to prevent the centering sleeve from falling off.
4. The centering device for a roll of a bar mill according to claim 3, characterized in that: the included angle between the matching surface of the flat sleeve and the inclined surface sleeve and the central axis of the centering device for the roller of the bar mill is alpha, the static friction coefficient of the flat sleeve and the inclined surface sleeve is mu, and the requirement that tan alpha is less than mu is met, so that the centering device for the roller of the bar mill can work stably.
5. The centering device for a roll of a bar mill according to claim 4, characterized in that: the inclined sleeve is provided with a centering sleeve shaft shoulder, and a gap is reserved between the centering sleeve shaft shoulder and the flat sleeve after the locking nut is locked so as to provide certain pretightening force for the centering sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222761643.0U CN218310012U (en) | 2022-10-17 | 2022-10-17 | Centering device for bar mill roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222761643.0U CN218310012U (en) | 2022-10-17 | 2022-10-17 | Centering device for bar mill roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218310012U true CN218310012U (en) | 2023-01-17 |
Family
ID=84826174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222761643.0U Active CN218310012U (en) | 2022-10-17 | 2022-10-17 | Centering device for bar mill roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218310012U (en) |
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2022
- 2022-10-17 CN CN202222761643.0U patent/CN218310012U/en active Active
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