CN216881119U - Straightening roller shaft with anti-breaking structure - Google Patents
Straightening roller shaft with anti-breaking structure Download PDFInfo
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- CN216881119U CN216881119U CN202121870216.5U CN202121870216U CN216881119U CN 216881119 U CN216881119 U CN 216881119U CN 202121870216 U CN202121870216 U CN 202121870216U CN 216881119 U CN216881119 U CN 216881119U
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Abstract
The utility model discloses a straightening roll shaft with a breakage-proof structure, and relates to the technical field of steel rolling straighteners. The straightening roll shaft with the anti-breaking structure comprises a shaft body and a shaft neck, wherein the shaft body and the shaft neck are integrally arranged, the joint of the shaft body and the shaft neck is in a conical surface arrangement, and a spacing ring is matched at the joint; according to the utility model, the spacing ring and the journal are fixed through the positioning bolt so as to further improve the stability between the spacing ring and the journal, thereby increasing the strength of the journal.
Description
Technical Field
The utility model relates to the field of steel rolling and straightening machines, in particular to a straightening roll shaft with a breakage-proof structure.
Background
In a pickling line of a rolling mill, in order to improve the pickling efficiency of a hot-rolled strip, the surface of the hot-rolled strip is generally subjected to a descaling treatment before pickling. The straightening machine can straighten the head and the body of the strip steel, the strip steel is repeatedly bent in the straightening process, and oxide skin on the surface of the strip steel can be loosened, so that the pickling efficiency of the hot-rolled strip steel is improved.
A supporting roller shaft of the straightening machine straightens the head and the body of the strip steel, the supporting roller shaft comprises a shaft body and a shaft neck, the diameters of the shaft body and the shaft neck are inconsistent, circular arc transition is adopted between the shaft body and the shaft neck, and in the actual use process, due to the fact that the circular arc transition is too short, the stress of the connecting part of the shaft body and the shaft neck is larger than the bearing capacity of the connecting part, fatigue cracks are caused, and the accident of the supporting roller breaking equipment of the straightening machine occurs.
Patent No. CN201820570544.5 discloses a straightening roll assembly, which adopts a sealing structure to protect bearings so as to prolong the service life of the straightening roll, and the transition is also arc transition, but does not disclose a solution that the stress at the connecting part of the shaft body and the shaft neck is greater than the bearing capacity of the shaft body and the shaft neck due to too short arc transition, thereby causing fatigue cracks.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is that the stress of the connecting part of the roll body and the roll neck of the supporting roll is larger than the bearing capacity of the connecting part due to too short arc transition, so that fatigue cracks are generated, and the accident of equipment for breaking the supporting roll of the straightening machine occurs.
In order to solve the technical problems, the utility model provides a straightening roll shaft with a breakage-proof structure, which comprises a shaft body and a shaft neck, wherein the shaft body and the shaft neck are integrally arranged, the joint of the shaft body and the shaft neck is arranged in a conical surface manner, and a spacing ring is matched with the joint.
The technical effects are as follows: the junction of shaft body and axle journal is the conical surface and sets up the length that has increased the transition face to avoid stress concentration to lead to the cracked condition emergence of junction emergence of shaft body and axle journal, the effectual stress of having solved the back-up roll shaft and roll journal connection position is greater than its bearing capacity and then leads to the problem of fatigue crack's production, avoids taking place straightener back-up roll fracture equipment accident. The spacer ring matches the radial thickness of the journal thereby increasing the overall strength of the journal.
The straightening roller shaft with the anti-breaking structure is characterized in that the joint of the shaft body and the shaft neck inclines from the shaft body to the shaft neck.
The technical effects are as follows: the joint of the shaft body and the shaft neck is obliquely arranged from the shaft body to the shaft neck so as to facilitate the assembly between the spacer ring and the shaft neck.
The spacer ring and the connecting part of the shaft body and the shaft neck are in interference fit.
The technical effects are as follows: the spacer ring and the shaft body can be integrated with the shaft neck through interference fit at the joint of the shaft body and the shaft neck, and the strength of the shaft neck is effectively improved.
The inner wall of the spacer ring is arranged in a conical surface mode, and the gradient of the conical surface of the spacer ring is consistent with the gradient of the conical surface at the joint of the shaft body and the shaft neck.
The technical effects are as follows: in order to realize the tight assembly of the spacer ring and the shaft neck, the conical slope of the spacer ring is required to be consistent with that of the joint of the shaft body and the shaft neck.
The straightening roller shaft with the anti-breaking structure is characterized in that the inner wall of the spacer ring is provided with a reinforcing layer through carburizing treatment.
The technical effects are as follows: the reinforced layer obtained by carburizing the inner wall of the spacer ring improves the surface hardness and the wear resistance of the spacer ring, thereby prolonging the integral strength of the straightening roller shaft.
The straightening roller shaft with the anti-breaking structure is characterized in that the inner wall of the spacer ring is provided with an annular bulge matched with the shaft neck.
The technical effects are as follows: the annular bulge of the spacer ring is used for being matched with the annular groove of the journal, when the annular bulge of the spacer ring is positioned in the annular groove of the journal, the assembly of the spacer ring and the journal is completed, and the spacer ring is prevented from being broken due to the assembly transition of the spacer ring.
The straightening roll shaft with the anti-breaking structure is characterized in that the spacer ring is in threaded connection with a positioning bolt, and the positioning bolt is used for the spacer ring and the shaft neck.
The technical effects are as follows: the positioning bolt fixes the spacer ring and the journal to further improve the stability between the spacer ring and the journal, thereby increasing the strength of the journal.
The utility model has the beneficial effects that:
(1) the utility model avoids the situation that the joint of the shaft body and the shaft neck is broken due to stress concentration by increasing the length of the transition surface, and effectively solves the problem that the stress of the joint of the supporting roller body and the shaft neck is greater than the bearing capacity of the joint so as to cause fatigue cracks;
(2) the reinforcing layer obtained by carburizing the inner wall of the spacer ring improves the surface hardness and the wear resistance of the spacer ring, thereby prolonging the integral strength of the straightening roll shaft;
(3) according to the utility model, the spacing ring and the journal are fixed through the positioning bolt so as to further improve the stability between the spacing ring and the journal, thereby increasing the strength of the journal.
Drawings
FIG. 1 is a schematic view showing the structure of a straightening roll shaft according to the present invention;
fig. 2 is a schematic structural view of the spacer ring of the present invention.
Wherein: 1. a shaft body; 2. a journal; 3. setting a conical surface; 4. a spacer ring; 5. a reinforcing layer; 6. an annular protrusion.
Detailed Description
The straightening roller shaft with the breakage-proof structure provided by the embodiment has the structure as shown in the figure, and comprises a shaft body 1 and a shaft neck 2, wherein the shaft body 1 and the shaft neck 2 are integrally arranged, the joint of the shaft body 1 and the shaft neck 2 is a conical surface arrangement 3, and the joint is matched with a spacer ring 4.
The shaft body 1 is the length that the conical surface set 3 has increased the transition face with the junction of axle journal 2 to avoid stress concentration to lead to the cracked condition of the junction emergence of shaft body 1 and axle journal 2, the effectual stress of having solved the back-up roll shaft and roll journal junction is greater than its bearing capacity and then leads to the problem of fatigue crack's production, avoids taking place straightener backing-up roll fracture equipment accident. The spacer ring 4 matches the radial thickness of the journal 2 to increase the overall strength of the journal 2.
The joint of the shaft body 1 and the shaft neck 2 inclines from the shaft body 1 to the shaft neck 2, and the joint of the shaft body 1 and the shaft neck 2 inclines from the shaft body 1 to the shaft neck 2 to facilitate the assembly between the spacer ring 4 and the shaft neck 2.
The spacer ring 4 and the shaft body 1 are in interference fit with the joint of the shaft neck 2, and the spacer ring 4 and the shaft body 1 are in interference fit with the joint of the shaft neck 2 so that the spacer ring 4 and the shaft neck 2 can form a whole, thereby effectively improving the strength of the shaft neck 2.
The inner wall of the spacer ring 4 is provided with a conical surface 3, and the gradient of the conical surface of the spacer ring 4 is consistent with that of the connecting part of the shaft body 1 and the shaft neck 2. The spacer ring 4 needs to have a conical slope consistent with that of the joint of the shaft body 1 and the shaft neck 2 so as to realize that the spacer ring 4 and the shaft neck 2 can be assembled tightly.
The inner wall of the spacer ring 4 is provided with a reinforcing layer 5 through carburizing treatment, and the reinforcing layer 5 obtained through carburizing treatment on the inner wall of the spacer ring 4 improves the surface hardness and the wear resistance of the spacer ring 4, so that the integral strength of the straightening roll shaft is improved.
The inner wall of the spacer ring 4 is provided with an annular protrusion 6 used for being matched with the journal 2, the annular protrusion 6 of the spacer ring 4 is used for being matched with an annular groove of the journal 2, when the annular protrusion of the spacer ring 4 is positioned in the annular groove of the journal 2, the spacer ring 4 is shown to be assembled with the journal 2, and the spacer ring 4 is prevented from being broken due to assembly transition of the spacer ring 4.
The spacer ring 4 is in threaded connection with a positioning bolt, the positioning bolt is used for the spacer ring 4 and the journal 2, and the positioning bolt fixes the spacer ring 4 and the journal 2 so as to further improve the stability between the spacer ring 4 and the journal 2, and therefore the strength of the journal 2 is increased.
In addition to the above embodiments, the present invention may have other embodiments; all technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (3)
1. The utility model provides a straightening roller axle with prevent disconnected structure, includes axle body (1) and axle journal (2), axle body (1) and axle journal (2) integrative the setting, its characterized in that: the shaft body (1) is conical surface setting (3) with the junction of axle journal (2), and this junction adaptation has spacer ring (4), the junction of shaft body (1) and axle journal (2) is from shaft body (1) to axle journal (2) department slope, spacer ring (4) and shaft body (1) and the junction interference fit of axle journal (2), spacer ring (4) inner wall is conical surface setting (3), and the conical surface slope of spacer ring (4) is unanimous with the conical surface slope of the junction of shaft body (1) and axle journal (2), spacer ring (4) inner wall is provided with enhancement layer (5) through carburization.
2. The straightening roll shaft with a breakage preventing structure according to claim 1, wherein: and an annular bulge (6) matched with the shaft neck (2) is arranged on the inner wall of the spacer ring (4).
3. The straightening roll shaft with a breakage preventing structure according to claim 2, wherein: the spacer ring (4) is in threaded connection with a positioning bolt, and the positioning bolt is used for the spacer ring (4) and the journal (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121870216.5U CN216881119U (en) | 2021-08-11 | 2021-08-11 | Straightening roller shaft with anti-breaking structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121870216.5U CN216881119U (en) | 2021-08-11 | 2021-08-11 | Straightening roller shaft with anti-breaking structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216881119U true CN216881119U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121870216.5U Active CN216881119U (en) | 2021-08-11 | 2021-08-11 | Straightening roller shaft with anti-breaking structure |
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| Country | Link |
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| CN (1) | CN216881119U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115027524A (en) * | 2022-05-14 | 2022-09-09 | 中车眉山车辆有限公司 | Lightweight draw beam assembly for heavy-duty truck |
-
2021
- 2021-08-11 CN CN202121870216.5U patent/CN216881119U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115027524A (en) * | 2022-05-14 | 2022-09-09 | 中车眉山车辆有限公司 | Lightweight draw beam assembly for heavy-duty truck |
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