CN215786462U - Assembly structure of hollow shaft and core roller of vertical rolling mill - Google Patents
Assembly structure of hollow shaft and core roller of vertical rolling mill Download PDFInfo
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- CN215786462U CN215786462U CN202122397476.1U CN202122397476U CN215786462U CN 215786462 U CN215786462 U CN 215786462U CN 202122397476 U CN202122397476 U CN 202122397476U CN 215786462 U CN215786462 U CN 215786462U
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Abstract
The utility model discloses an assembly structure of a hollow shaft and a core roller of a vertical rolling mill, which comprises: the core roller is provided with a first step hole with a conical inner part at one end, and the inclination of the cone is 6 degrees; the hollow shaft is provided with a conical taper section outside, the conical inclination is 6 degrees, and the conical taper section is fixedly locked with the first stepped hole at an inclination of 6 degrees and matched with the first stepped hole; the working section is fixed on the big end of the taper section of the hollow shaft. Because the conical taper section is matched with the 6-degree inclination of the conical first step hole in a fixed locking mode, the diameter difference between the conical taper section of the core roller and the working section is reduced, stress concentration caused by too fast production after long-time production is reduced, the core roller cannot be broken frequently, the condition that the core roller failure equipment is shut down, replaced and stopped to produce is avoided, and the production efficiency is improved.
Description
Technical Field
The utility model relates to an assembly structure of a hollow shaft and a core roller of a vertical rolling mill, belonging to the technical field of vertical rolling mills.
Background
The vertical rolling mill is also called ring rolling mill or ring expanding mill, is a special forging machine for producing ferrule forgings widely used in bearing industry, and is used for rolling and shaping annular blanks forged in the previous blank making procedure. The D51Y-800E ring rolling machine (a rolling die of CN110076270A and a use method of the ring rolling machine using the rolling die) belongs to a widened inclined radial ring rolling machine, has larger down force and driving torque than a common ring rolling machine, and finds that the core roller has serious stress concentration effect in the production process in the process of using the core roller after purchasing by a company, so that the core roller has serious loss.
The main reasons are: the original hollow shaft has the taper of 10 degrees, the core roller needs to be matched and assembled with the hollow shaft, the diameter difference between the taper section and the working section of the small-specification core roller is large, stress concentration is generated after the core roller is produced for a long time, the core roller is broken frequently, the core roller is replaced by the equipment to be shut down after the core roller fails, the production is stopped when the equipment is shut down, and the production efficiency is seriously influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an assembly structure of a hollow shaft and a core roller of a vertical rolling mill.
The utility model is realized by the following technical scheme.
The utility model provides an assembly structure of a hollow shaft and a core roller of a vertical rolling mill, which comprises:
the core roller is provided with a first step hole with a conical inner part at one end, and the inclination of the cone is 6 degrees;
the hollow shaft is provided with a conical taper section outside, the conical inclination is 6 degrees, and the conical taper section is fixedly locked with the first stepped hole at an inclination of 6 degrees and matched with the first stepped hole;
the working section is fixed on the big end of the taper section of the hollow shaft.
The taper section and the first stepped hole have the slope matching length of 226 mm.
The working section and the taper section are integrally fixed.
A second stepped hole communicated with the small end of the first stepped hole is formed in the hollow shaft, and the diameter of the second stepped hole is linear and is the same as that of the small end of the first stepped hole; a third stepped hole communicated with the second stepped hole is formed in the hollow shaft, and the third stepped hole is linear; and a connecting shaft section B is fixed at the small end of the taper section, and the shape of the connecting shaft section B is consistent with the shape of the second stepped hole and the third stepped hole and is matched with the second stepped hole and the third stepped hole.
The taper section and the connecting shaft section B are integrally fixed.
A long hole which is communicated with the third step hole and communicated to the other shaft end of the hollow shaft is arranged in the hollow shaft, and the long hole is linear; a threaded hole is formed in the connecting shaft section B; the pull rod penetrates through the long hole and is screwed and fixed with the threaded hole of the connecting shaft section B, and the other end of the pull rod is screwed and fixed with the nut; the taper section is matched with the taper hole of the first step hole in a 6-degree inclination manner through the effects of screwing and fixing the pull rod and the threaded hole of the connecting shaft section B and screwing and fixing the nut.
The outer part of the hollow shaft is provided with four steps which are sequentially reduced from the first step hole to the long hole,
the step that the hollow shaft is located first step hole outside is equipped with the screw thread.
And the step of the hollow shaft positioned outside the second step hole is provided with threads.
The steps of the hollow shaft, which are positioned outside the tail end of the long hole, are provided with threads.
The utility model has the beneficial effects that: because the conical taper section is matched with the 6-degree inclination of the conical first step hole in a fixed locking mode, the diameter difference between the conical taper section of the core roller and the working section is reduced, stress concentration caused by too fast production after long-time production is reduced, the core roller cannot be broken frequently, the condition that the core roller failure equipment is shut down, replaced and stopped to produce is avoided, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of an installation section of the present invention;
FIG. 2 is a schematic cross-sectional view of a core roll of the present invention;
FIG. 3 is a schematic view of a hollow shaft according to the present invention in partial cross-section;
in the figure: 1-core roll; 2-a hollow shaft; 3-a pull rod; 4-a nut; 5-a first stepped bore; 6-a second stepped bore; 7-a third stepped bore; 8-long holes; 9-a working section; 10-taper section; 11-connecting shaft segment B.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
See fig. 1-3.
The utility model relates to an assembly structure of a hollow shaft and a core roller of a vertical rolling mill, which comprises:
the core roller comprises a core roller 1, wherein one end of the core roller 1 is provided with a first step hole 5 with a conical inner part, and the conical inclination is 6 degrees;
the hollow shaft 2 is provided with a conical taper section 10 outside the hollow shaft 2, the conical inclination is 6 degrees, the taper section 10 is fixedly locked with the first stepped hole 5 for 6-degree inclination matching, and the matching length is 226 mm;
the large end of the taper section 10 of the hollow shaft 2 is integrally fixed with a working section 9.
Because the conical taper section 10 is matched with the conical first step hole 5 in a fixed locking 6-degree inclination, the diameter difference between the conical taper section 10 of the core roller 1 and the working section 9 is reduced, the phenomenon that stress concentration is generated too fast after long-time production is reduced, the core roller 1 is not broken frequently, the condition that the core roller failure equipment is shut down, replaced and stopped production is avoided, and the production efficiency is improved.
A second stepped hole 6 communicated with the small end of the first stepped hole 5 is formed in the hollow shaft 2, and the diameter of the second stepped hole 6 is linear and is the same as that of the small end of the first stepped hole 5; a third stepped hole 7 communicated with the second stepped hole 6 is formed in the hollow shaft 2, and the third stepped hole 7 is linear; and a connecting shaft section B11 is integrally fixed at the small end of the taper section 10, and the connecting shaft section B11 is consistent in shape with the second stepped hole 6 and the third stepped hole 7 and matched with the second stepped hole 6 and the third stepped hole 7.
A long hole 8 communicated with the third step hole 7 and communicated to the other shaft end of the hollow shaft 2 is formed in the hollow shaft 2, and the long hole 8 is linear; a threaded hole is formed in the connecting shaft section B11; the pull rod 3 penetrates through the long hole 8 and is screwed and fixed with a threaded hole of the connecting shaft section B11, and the other end of the pull rod 3 is screwed and fixed with the nut 4; the taper-shaped taper section 10 and the taper-shaped first step hole 5 are fixedly locked by 6-degree inclination fit under the action of screwing and fixing the pull rod 3 and the threaded hole of the connecting shaft section B11 and screwing and fixing the nut 4.
The hollow shaft 2 is externally provided with four steps, the steps are sequentially reduced from the first step hole 5 to the long hole 8, and the steps positioned outside the first step hole 5, the steps positioned outside the second step hole 6 and the steps positioned outside the tail end of the long hole 8 are respectively provided with threads, so that the hollow shaft 2 is convenient to mount.
Claims (10)
1. An assembly structure of a hollow shaft and a core roll of a vertical rolling mill, characterized by comprising:
the core roller (1), one end of the core roller (1) is provided with a first step hole (5) with a conical inner part, and the conical inclination is 6 degrees;
the hollow shaft (2), the outside of the hollow shaft (2) is provided with a conical taper section (10), the conical inclination is 6 degrees, and the conical taper section (10) is fixedly locked with the first stepped hole (5) at an inclination of 6 degrees and matched with the first stepped hole;
the working section (9) is fixed on the big end of the taper section (10) of the hollow shaft (2).
2. An assembling structure of a hollow shaft and a core roll of a vertical rolling mill according to claim 1, wherein: the taper section (10) and the first stepped hole (5) are in slope fit, and the length is 226 mm.
3. An assembling structure of a hollow shaft and a core roll of a vertical rolling mill according to claim 1, wherein: the working section (9) and the taper section (10) are integrally fixed.
4. An assembling structure of a hollow shaft and a core roll of a vertical rolling mill according to claim 1, wherein: a second stepped hole (6) communicated with the small end of the first stepped hole (5) is formed in the hollow shaft (2), and the diameter of the second stepped hole (6) is linear and is the same as that of the small end of the first stepped hole (5); a third stepped hole (7) communicated with the second stepped hole (6) is formed in the hollow shaft (2), and the third stepped hole (7) is linear; and a connecting shaft section B (11) is fixed at the small end of the taper section (10), and the shape of the connecting shaft section B (11) is consistent with that of the second stepped hole (6) and the third stepped hole (7) and matched with the second stepped hole (6) and the third stepped hole (7).
5. An assembling structure of a hollow shaft and a core roll of a vertical rolling mill according to claim 4, wherein: the taper section (10) and the connecting shaft section B (11) are integrally fixed.
6. An assembling structure of a hollow shaft and a core roll of a vertical rolling mill according to claim 5, wherein: a long hole (8) communicated with the third stepped hole (7) and communicated to the other shaft end of the hollow shaft (2) is formed in the hollow shaft (2), and the long hole (8) is linear; a threaded hole is formed in the connecting shaft section B (11); the pull rod (3) penetrates through the long hole (8) and is screwed and fixed with a threaded hole of the connecting shaft section B (11), and the other end of the pull rod (3) is screwed and fixed with the nut (4); the taper section (10) is fixedly locked with the taper first step hole (5) at an inclination of 6 degrees under the action of screwing and fixing the pull rod (3) and the threaded hole of the connecting shaft section B (11) and screwing and fixing the nut (4).
7. An assembling structure of a hollow shaft and a core roll of a vertical rolling mill according to claim 6, wherein: the hollow shaft (2) is externally provided with four steps, and the steps are sequentially reduced from the first step hole (5) to the long hole (8).
8. An assembling structure of a hollow shaft and a core roll of a vertical rolling mill according to claim 7, wherein: the hollow shaft (2) is provided with threads on the step outside the first step hole (5).
9. An assembling structure of a hollow shaft and a core roll of a vertical rolling mill according to claim 7, wherein: the steps of the hollow shaft (2) positioned outside the second step hole (6) are provided with threads.
10. An assembling structure of a hollow shaft and a core roll of a vertical rolling mill according to claim 7, wherein: the steps of the hollow shaft (2) positioned outside the tail end of the long hole (8) are provided with threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122397476.1U CN215786462U (en) | 2021-09-30 | 2021-09-30 | Assembly structure of hollow shaft and core roller of vertical rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122397476.1U CN215786462U (en) | 2021-09-30 | 2021-09-30 | Assembly structure of hollow shaft and core roller of vertical rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215786462U true CN215786462U (en) | 2022-02-11 |
Family
ID=80169077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122397476.1U Active CN215786462U (en) | 2021-09-30 | 2021-09-30 | Assembly structure of hollow shaft and core roller of vertical rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215786462U (en) |
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2021
- 2021-09-30 CN CN202122397476.1U patent/CN215786462U/en active Active
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