CN204974789U - A centre form for seamless steel pipe extrusion - Google Patents
A centre form for seamless steel pipe extrusion Download PDFInfo
- Publication number
- CN204974789U CN204974789U CN201520737265.XU CN201520737265U CN204974789U CN 204974789 U CN204974789 U CN 204974789U CN 201520737265 U CN201520737265 U CN 201520737265U CN 204974789 U CN204974789 U CN 204974789U
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- Prior art keywords
- section
- chamfering
- chamfer
- steel pipe
- seamless steel
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Abstract
The utility model discloses a centre form for seamless steel pipe extrusion, including columniform direction section and columniform shaping section, the diameter of direction section is less than the diameter of shaping section, is provided with the changeover portion between direction section and the shaping section, the front end border department of direction section is provided with first chamfer and second chamfer, and first chamfer and second chamfer are the linear type chamfer, and the angle of first chamfer is 11 degrees, and the angle of second chamfer is 5 degrees, and the preceding terminal surface of direction section is close to to first chamfer, the anterior upward coating of the section that leads has a ceramal coating, and the thickness of a ceramal coating is 0.25 -0.34MM, and a ceramal coating self -steering section front portion is to the length less than or equal to 180MM of shaping section extension. The utility model has the advantages of prior art's drawback, the reasonable novelty of structural design can be overcome to it.
Description
Technical field
The utility model relates to a kind of internal mold extruded for seamless steel pipe, belongs to seamless steel pipe field.
Background technology
Seamless steel pipe has hollow section, and a large amount of pipeline being used as conveying fluid, as transfer oil, natural gas, coal gas, water and some solid material etc.Seamless steel pipe compared with the solid steel such as round steel, under identical bending resistance torsional strength, the lighter in weight of seamless steel pipe; Meanwhile, seamless steel pipe is also widely used in manufacturing structure part and machine components, and as the steel scaffold etc. in oil drill rocker, truck drive shaft, bicycle rack and construction, stock utilization is high, and manufacturing process is simple and easy, and machining period reduces.Just because of the particularity of seamless steel pipe purposes, therefore, need to use various production equipment in the production process of seamless steel pipe, cold drawing die is exactly produce one very important in seamless steel pipe equipment.Internal mold is one of important mould in seamless steel tube production, and its Main Function carries out perforation processing to steel billet exactly.But existing most of cold drawing die comes with some shortcomings part in structural design, and cannot ensure the production precision of seamless steel pipe, the quality of production is low, and mould easily damages.
Utility model content
For the deficiency that prior art exists, technical problem to be solved in the utility model is, provides a kind of internal mold extruded for seamless steel pipe, and the life-span is high, perforation quality is good.
For solving the problems of the technologies described above, the technical scheme that the utility model is taked is, a kind of internal mold extruded for seamless steel pipe, comprises columniform guide section and columniform profiled section, the diameter of guide section is less than the diameter of profiled section, is provided with changeover portion between guide section and profiled section; The front edge place of described guide section is provided with the first chamfering and the second chamfering, and the first chamfering and the second chamfering are linear pattern chamfering, and the angle of the first chamfering is 11 degree, and the angle of the second chamfering is 5 degree, and the first chamfering is near the front end face of guide section; The front portion of described guide section is coated with the first ceramal coating, the thickness of the first ceramal coating is 0.25-0.34MM, and the anterior length extended to profiled section of the first ceramal coating self-steering section is less than or equal to 180MM; The junction of described guide section and profiled section is coated with the second ceramal coating on the surface.
Optimize, the above-mentioned internal mold extruded for seamless steel pipe, described first ceramal coating at least covers the second chamfering.
The utility model has the advantage of that it can overcome the drawback of prior art, reasonable in design is novel.Seamless steel pipe internal mold machined alloy coat in extremely flimsy working end; this alloy coat has following characteristics: be metallurgical binding with internal mold matrix; and hardness is large, highly polished, resistance to elevated temperatures is good; the impact of severe friction and high temperature, high pressure in perforation process can be resisted, thus play the effect of protection internal mold matrix.Therefore the service life of internal mold can greatly be improved.First chamfering and second chamfering of the front edge place setting of guide section can prevent Leading Edge Deformation in process of production at steel pipe, occur the bad phenomenon such as burr, improve the quality of production.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure: 1 be guide section, 2 be profiled section, 3 be the second ceramal coating for changeover portion, 4 be the first chamfering, 5 be the second chamfering, 6 is the first ceramal coating, 7.
Detailed description of the invention
Technical characterstic of the present invention is set forth further below in conjunction with accompanying drawing and specific embodiment.
Embodiment 1
The utility model is a kind of internal mold extruded for seamless steel pipe, comprises columniform guide section and columniform profiled section, and the diameter of guide section is less than the diameter of profiled section, is provided with changeover portion between guide section and profiled section; The front edge place of described guide section is provided with the first chamfering and the second chamfering, and the first chamfering and the second chamfering are linear pattern chamfering, and the angle of the first chamfering is 11 degree, and the angle of the second chamfering is 5 degree, and the first chamfering is near the front end face of guide section; The front portion of described guide section is coated with the first ceramal coating, the thickness of the first ceramal coating is 0.25MM, and the anterior length extended to profiled section of the first ceramal coating self-steering section is less than or equal to 180MM; The junction of described guide section and profiled section is coated with the second ceramal coating on the surface.Described first ceramal coating at least covers the second chamfering.
The utility model has the advantage of that it can overcome the drawback of prior art, reasonable in design is novel.Seamless steel pipe internal mold machined alloy coat in extremely flimsy working end; this alloy coat has following characteristics: be metallurgical binding with internal mold matrix; and hardness is large, highly polished, resistance to elevated temperatures is good; the impact of severe friction and high temperature, high pressure in perforation process can be resisted, thus play the effect of protection internal mold matrix.Therefore the service life of internal mold can greatly be improved.First chamfering and second chamfering of the front edge place setting of guide section can prevent Leading Edge Deformation in process of production at steel pipe, occur the bad phenomenon such as burr, improve the quality of production.
Embodiment 2
The difference of the present embodiment and embodiment 1 is: the thickness of the first ceramal coating is 0.34MM.
Embodiment 3
The difference of the present embodiment and embodiment 1 and 2 is: the thickness of the first ceramal coating is 0.3MM.
Certainly, above-mentioned explanation is not to restriction of the present utility model, and the utility model is also not limited to above-mentioned citing; those skilled in the art; in essential scope of the present utility model, the change made, remodeling, interpolation or replacement, all should belong to protection domain of the present utility model.
Claims (2)
1. for the internal mold that seamless steel pipe is extruded, it is characterized in that: comprise columniform guide section and columniform profiled section, the diameter of guide section is less than the diameter of profiled section, is provided with changeover portion between guide section and profiled section; The front edge place of described guide section is provided with the first chamfering and the second chamfering, and the first chamfering and the second chamfering are linear pattern chamfering, and the angle of the first chamfering is 11 degree, and the angle of the second chamfering is 5 degree, and the first chamfering is near the front end face of guide section; The front portion of described guide section is coated with the first ceramal coating, the thickness of the first ceramal coating is 0.25-0.34MM, and the anterior length extended to profiled section of the first ceramal coating self-steering section is less than or equal to 180MM; The junction of described guide section and profiled section is coated with the second ceramal coating on the surface.
2. the internal mold extruded for seamless steel pipe according to claim 1, is characterized in that: described first ceramal coating at least covers the second chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520737265.XU CN204974789U (en) | 2015-09-23 | 2015-09-23 | A centre form for seamless steel pipe extrusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520737265.XU CN204974789U (en) | 2015-09-23 | 2015-09-23 | A centre form for seamless steel pipe extrusion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204974789U true CN204974789U (en) | 2016-01-20 |
Family
ID=55109209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520737265.XU Expired - Fee Related CN204974789U (en) | 2015-09-23 | 2015-09-23 | A centre form for seamless steel pipe extrusion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204974789U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2697306C1 (en) * | 2018-12-20 | 2019-08-13 | Акционерное общество "Композит" (АО "Композит") | Matrix for pressing materials with low process plasticity |
-
2015
- 2015-09-23 CN CN201520737265.XU patent/CN204974789U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2697306C1 (en) * | 2018-12-20 | 2019-08-13 | Акционерное общество "Композит" (АО "Композит") | Matrix for pressing materials with low process plasticity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20180923 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |