CN220970371U - Core rod for thick-wall seamless steel tube rolling mill - Google Patents
Core rod for thick-wall seamless steel tube rolling mill Download PDFInfo
- Publication number
- CN220970371U CN220970371U CN202323016664.0U CN202323016664U CN220970371U CN 220970371 U CN220970371 U CN 220970371U CN 202323016664 U CN202323016664 U CN 202323016664U CN 220970371 U CN220970371 U CN 220970371U
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- cylinder
- rod body
- concave
- thick
- rolling mill
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- 238000009785 tube rolling Methods 0.000 title claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000005096 rolling process Methods 0.000 claims description 15
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model discloses a core rod for a thick-wall seamless steel tube rolling mill, which comprises a rod body and two cylinders respectively fixed at two ends of the rod body, wherein the two ends of the rod body are respectively provided with a first concave hole, the two first concave holes are internally provided with first screw holes, the end face of the cylinder is provided with a second concave hole, the second concave hole is internally provided with a convex column, the convex column is also provided with a second screw hole penetrating through the cylinder, one end of the rod body is inserted into the second concave hole of the cylinder, the convex column is inserted into the first concave hole, the end of the rod body is abutted against a concave ring, the aperture of the first screw hole is smaller than that of the second screw hole, the core rod also comprises a fixing bolt, the fixing bolt is provided with a thread section corresponding to the first screw hole and the second screw hole, and a copper pad ring is arranged between the rod body and the second concave hole.
Description
Technical Field
The utility model relates to a core rod for a thick-wall seamless steel tube rolling mill.
Background
In the process of manufacturing thick-wall seamless steel pipes, steel pipe manufacturers often meet orders that concave holes are required to be processed at the end parts of the steel pipes (namely, expanding holes are processed in the end parts on the basis of through holes of the steel pipes); the traditional mode is to roll out the steel pipe and then turn the end of the steel pipe, the processing efficiency is lower, the cost is higher, for example, concave holes can be directly processed in the rolling process, the processing efficiency can be improved undoubtedly, and the manufacturing cost is reduced.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art, and provides a core rod capable of assisting a rolling mill to directly process concave holes on the end part of a steel pipe in the rolling process.
The technical scheme of the utility model is as follows: a core rod for a thick-wall seamless steel tube rolling mill comprises a rod body and two cylinders respectively fixed at two ends of the rod body;
The two ends of the rod body are respectively provided with a first concave hole, first screw holes are respectively arranged in the two first concave holes, the end face of the cylinder, which faces one end of the rod body, is provided with a second concave hole corresponding to the outer diameter of the rod body, a convex column is arranged in the second concave hole, the convex column corresponds to the first concave hole, a concave ring is formed between the convex column and the inner wall of the second concave hole, and the convex column is also provided with a second screw hole which penetrates through the cylinder;
one end of the rod body is inserted into the second concave hole of the cylinder, the convex column is inserted into the first concave hole, the end part of the rod body is abutted against the concave ring, and the aperture of the first screw hole is smaller than that of the second screw hole;
the fixing bolt is provided with a thread section corresponding to the first screw hole and the second screw hole respectively, and the fixing bolt is in threaded connection with the rod body and the cylinder;
The copper pad ring is arranged between the rod body and the second concave hole.
Specifically, the outer diameter of the cylinder is larger than the outer diameter of the plate body.
Specifically, the cylinder has various specifications.
Specifically, the core rod and the cylinder are of tungsten steel integrated structure.
Further, the first screw hole and the concave hole are coaxially arranged.
Further, the second screw hole, the convex column and the second concave hole are coaxially arranged.
Further, the periphery of one end of the cylinder, facing the rod body, is also provided with a first chamfer.
Further, the outer periphery of the end part of the rod body is also provided with a second chamfer.
Further, the outer end of the cylinder is also provided with a counter bore corresponding to the fixing bolt.
Furthermore, one end of the cylinder facing the rod body is also provided with a step-shaped structure.
The beneficial effects of the utility model are as follows: by replacing cylinders with different specifications, concave holes with different depths and wall thicknesses can be formed at the end part of the thick-wall seamless steel pipe in the rolling process, and later turning is not needed, so that the manufacturing cost of the thick-wall seamless steel pipe can be reduced, and the processing efficiency is improved;
The rod body and the cylinder are positioned through two groups of concave holes and convex columns, so that concentricity is guaranteed, and the structure also ensures the reliability of the joint of the rod body and the cylinder;
The aperture of the first screw hole is smaller than that of the second screw hole, so that after the steel pipe is rolled and the fixing bolt is dismounted, the corresponding screw is screwed in to sequentially pull out the cylinder and the rod body, and the core rod is easier to dismount;
The copper pad ring is soft in material and has certain self-lubricating property, so that the ends of the cylinder and the rod body are easier to separate when the core rod is detached.
Drawings
FIG. 1 is a cross-sectional view of a rod and cylinder joint of the present utility model;
FIG. 2 is a schematic diagram of the structure of the present utility model;
FIG. 3 is a schematic view of the end of the body of the present utility model;
Fig. 4 is a schematic view of the structure of the cylindrical end portion of the present utility model.
In the figure: the novel aluminum alloy rod comprises a rod body 1, a cylinder 2, a first concave hole 3, a first screw hole 4, a second concave hole 5, a convex column 6, a second screw hole 7, a fixing bolt 8, a copper pad ring 9, a first chamfer 10, a second chamfer 11 and a counter bore 12.
Detailed Description
The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings.
Referring to FIGS. 1 to 4, a mandrel for a thick-wall seamless steel tube rolling mill comprises a bar body 1 and two cylinders 2 respectively fixed at two ends of the bar body 1;
The two ends of the rod body 1 are respectively provided with a first concave hole 3, first screw holes 4 are respectively arranged in the two first concave holes 3, the end face of the cylinder 2 facing one end of the rod body 1 is provided with a second concave hole 5 corresponding to the outer diameter of the rod body 1, the second concave hole 5 is internally provided with a convex column 6, the convex column 6 is arranged corresponding to the first concave hole 3, a concave ring is formed between the convex column 6 and the inner wall of the second concave hole 5, and the convex column 6 is also provided with a second screw hole 7 penetrating through the cylinder 2;
One end of the rod body 1 is inserted into the second concave hole 5 of the cylinder 2, the convex column 6 is inserted into the first concave hole 3, the end part of the rod body 1 is abutted against the concave ring, and the aperture of the first screw hole 4 is smaller than that of the second screw hole 7;
The fixing bolt 8 is provided with thread sections corresponding to the first screw hole 4 and the second screw hole 7 respectively, and the fixing bolt 8 is in threaded connection with the rod body 1 and the cylinder 2;
The novel rod comprises a rod body 1 and a second concave hole 5, and further comprises a copper backing ring 9, wherein the copper backing ring 9 is arranged between the rod body 1 and the second concave hole 5.
According to the structure, through replacing the cylinders 2 with different specifications, concave holes with different depths and wall thicknesses can be formed at the end parts of the thick-wall seamless steel pipes in the rolling process, later turning is not needed, the manufacturing cost of the thick-wall seamless steel pipes can be reduced, and the machining efficiency is improved;
The rod body 1 and the cylinder 2 are positioned through two groups of concave holes and convex columns 6, the concentricity is guaranteed, and the structure also ensures the reliability of the joint of the rod body 1 and the cylinder 2;
the aperture of the first screw hole 4 is smaller than that of the second screw hole 7, so that after the steel pipe is rolled and the fixing bolt 8 is dismounted, the cylinder 2 and the rod body 1 are sequentially pulled out by screwing in corresponding screws, and the core rod is easier to dismount;
The copper pad ring 9 is made of softer materials and has certain self-lubricating performance, so that the ends of the cylinder 2 and the rod body 1 are easier to separate when the core rod is disassembled.
Specifically, as shown in fig. 1 and 2, the outer diameter of the cylinder 2 is larger than the outer diameter of the plate body.
Specifically, the cylinder 2 has various specifications to meet different end processing requirements of the steel pipe.
In another embodiment, the core rod and the cylinder 2 are integrally formed by tungsten steel, and have the advantages of high hardness and good toughness.
In another embodiment, as shown in fig. 1, the first screw hole 4 is disposed coaxially with the concave hole.
In another embodiment, as shown in fig. 1, the second screw hole 7 and the boss 6 are coaxially disposed with the second concave hole 5.
In another embodiment, as shown in fig. 1 and 4, the outer circumference of the end of the cylinder 2 facing the rod 1 is further provided with a first chamfer 10.
In another embodiment, as shown in fig. 1 and 3, the outer periphery of the end of the rod body 1 is further provided with a second chamfer 11.
In another embodiment, as shown in fig. 1, the outer end of the cylinder 2 is further provided with a counter bore 12 corresponding to the fixing bolt 8.
In another embodiment, the end of the cylinder 2 facing the rod 1 is also provided with a stepped structure, so that the cylinder 2 can have more configuration in the end of the steel pipe during the rolling application of the steel pipe.
Claims (10)
1. The core rod for the thick-wall seamless steel tube rolling mill is characterized by comprising a rod body (1) and two cylinders (2) which are respectively fixed at two ends of the rod body (1);
The two ends of the rod body (1) are respectively provided with a first concave hole (3), two first screw holes (4) are respectively arranged in the first concave holes (3), a second concave hole (5) corresponding to the outer diameter of the rod body (1) is arranged on the end face of one end of the cylinder (2) facing the rod body (1), a convex column (6) is arranged in the second concave hole (5), the convex column (6) is arranged corresponding to the first concave hole (3), a concave ring is formed between the convex column (6) and the inner wall of the second concave hole (5), and a second screw hole (7) penetrating through the cylinder (2) is further arranged on the convex column (6);
One end of the rod body (1) is inserted into a second concave hole (5) of the cylinder (2), the convex column (6) is inserted into the first concave hole (3), the end part of the rod body (1) is abutted against the concave ring, and the aperture of the first screw hole (4) is smaller than that of the second screw hole (7);
The fixing device further comprises a fixing bolt (8), wherein the fixing bolt (8) is provided with a thread section corresponding to the first screw hole (4) and the second screw hole (7) respectively, and the fixing bolt (8) is in threaded connection with the rod body (1) and the cylinder (2);
The novel copper rod also comprises a copper backing ring (9), wherein the copper backing ring (9) is arranged between the rod body (1) and the second concave hole (5).
2. A mandrel for a thick-walled seamless steel pipe rolling mill according to claim 1, wherein the outer diameter of the cylinder (2) is larger than the outer diameter of the plate body.
3. A mandrel for a thick wall seamless steel pipe rolling mill according to claim 2, wherein the cylinder (2) has a plurality of specifications.
4. A mandrel for a thick-walled seamless steel pipe rolling mill according to claim 3, wherein the mandrel and the cylinder (2) are integrally formed of tungsten steel.
5. A mandrel for a thick wall seamless steel pipe rolling mill according to claim 4, wherein said first screw hole (4) is provided coaxially with the concave hole.
6. The mandrel for a thick-wall seamless steel pipe rolling mill according to claim 5, wherein the second screw hole (7) and the boss (6) are coaxially arranged with the second concave hole (5).
7. A mandrel for a thick wall seamless steel pipe rolling mill according to claim 6, wherein the outer periphery of the end of the cylinder (2) facing the bar body (1) is further provided with a first chamfer (10).
8. The mandrel for a thick-wall seamless steel pipe rolling mill according to claim 7, wherein the outer periphery of the end portion of the rod body (1) is further provided with a second chamfer (11).
9. The mandrel for a thick-wall seamless steel pipe rolling mill according to claim 8, wherein the outer end of the cylinder (2) is further provided with a counter bore (12) corresponding to the fixing bolt (8).
10. A mandrel for a thick wall seamless steel pipe rolling mill according to claim 9, wherein the end of the cylinder (2) facing the bar body (1) further has a stepped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323016664.0U CN220970371U (en) | 2023-11-09 | 2023-11-09 | Core rod for thick-wall seamless steel tube rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323016664.0U CN220970371U (en) | 2023-11-09 | 2023-11-09 | Core rod for thick-wall seamless steel tube rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220970371U true CN220970371U (en) | 2024-05-17 |
Family
ID=91066180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323016664.0U Active CN220970371U (en) | 2023-11-09 | 2023-11-09 | Core rod for thick-wall seamless steel tube rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220970371U (en) |
-
2023
- 2023-11-09 CN CN202323016664.0U patent/CN220970371U/en active Active
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| GR01 | Patent grant |