CN202984318U - Cold-drawing mould used for seamless steel tube - Google Patents
Cold-drawing mould used for seamless steel tube Download PDFInfo
- Publication number
- CN202984318U CN202984318U CN 201220595299 CN201220595299U CN202984318U CN 202984318 U CN202984318 U CN 202984318U CN 201220595299 CN201220595299 CN 201220595299 CN 201220595299 U CN201220595299 U CN 201220595299U CN 202984318 U CN202984318 U CN 202984318U
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- cold
- mould
- hole
- core rod
- seamless steel
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Abstract
The utility model relates to a cold-drawing mould used for a seamless steel tube. The cold-drawing mould used for the seamless steel tube comprises a mould sleeve and a mould core. The mould core is arranged inside the mould core. A through hole is formed in the bottom of the mould sleeve. A cold-drawing mould hole communicated with the through hole is formed in the mould core and is a cone table face. An included angle alpha between two waistlines of the cold-drawing mould hole is 17 to 19 degrees. Ratio of the height and the diameter of the mould sleeve and ratio of the height and the diameter of the mould core and the diameter are equal. By increasing the length of the mould sleeve and the mould core, meanwhile, the included angle alpha between two waistlines of the cold-drawing mould hole is reduced, quality of outer surface of the cold-drawing steel tube is greatly improved, and phenomena of draw-breaking, cracking, jutter and the like caused by shallow cold-drawing mould hole angle and hole depth in the past can be avoided.
Description
Technical field
The utility model relates to steel-pipe processing mold, especially a kind of cold drawing die for seamless steel pipe.
Background technology
Cold-drawn is a kind of processing technology of material, and for metal material, cold-drawn refers in order to reach certain shape and certain mechanical property, carries out drawing and be at material under the condition of normal temperature.as shown in Figure 1, in prior art, cold drawing die is generally adopted in cold-drawn for seamless steel pipe, this cold drawing die comprises die sleeve 1 and core rod 2, core rod 2 is placed in die sleeve 1, the bottom of die sleeve 1 has through hole, have the cold-drawn nib that is connected with above-mentioned through hole on core rod 2, described cold-drawn nib is the frustum face, angle between its cross section two stringcourses is larger, pull off but be prone to through the tubing with above-mentioned angle cold-drawn nib, tubing is easy to crack, the phenomenons such as jutter appear in tube surfaces, the tubing drawing deformation amount of passing through simultaneously this hole is low, greatly affected the quality of tubing cold-drawn, improved percent defective.
The utility model content
The applicant provides the another kind of cold drawing die that is used for seamless steel pipe for above-mentioned existing issue.
The technical scheme that the utility model adopts is as follows:
A kind of cold drawing die for seamless steel pipe, comprise die sleeve and core rod, core rod is placed in die sleeve, the bottom of die sleeve has through hole, have the cold-drawn nib that is connected with above-mentioned through hole on core rod, the cold-drawn nib is the frustum face, and the angle α between cold-drawn nib two stringcourses is 17 °～19 °, and the height of die sleeve and diameter ratio equate with height and the diameter ratio of core rod.
Its further technical scheme is:
The height of described die sleeve and core rod and diameter ratio are 8:5.
The beneficial effects of the utility model are as follows:
The utility model is by increasing the length of die sleeve and core rod, simultaneously the angle between cold-drawn nib taper table top two waists is reduced, greatly improved the cold drawing steel tube outer surface quality, avoid occurring in the past easily pulling off, ftractureing because of cold-drawn nib angle and the more shallow steel pipe that causes of hole depth, the phenomenons such as jutter, not only improve quality and the drawing deformation amount of Tube Drawing, also reduced percent defective.
Description of drawings
Fig. 1 is the structural representation of existing cold drawing die.
Fig. 2 is structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described.
As shown in Figure 2, the utility model comprises die sleeve 1 and core rod 2, core rod 2 is placed in die sleeve 1, the bottom of die sleeve 1 has through hole, have the cold-drawn nib that is connected with above-mentioned through hole on core rod 2, the cold-drawn nib is the frustum face, and the angle α between cold-drawn nib two stringcourses is 17 °～19 °, and the height of die sleeve 1 and diameter ratio equate with height and the diameter ratio of core rod 2.The height of die sleeve 1 and core rod 2 and diameter ratio are 8:5.
The utility model is by increasing the length of die sleeve and core rod, simultaneously the angle between cold-drawn nib taper table top two waists is reduced, greatly improved the cold drawing steel tube outer surface quality, avoid occurring in the past easily pulling off, ftractureing because of cold-drawn nib angle and the more shallow steel pipe that causes of hole depth, the phenomenons such as jutter, not only improve quality and the drawing deformation amount of Tube Drawing, also reduced percent defective.
Above description is to explanation of the present utility model, is not the restriction to utility model, and the utility model limited range is referring to claim, in the situation that without prejudice to basic structure of the present utility model, the utility model can be done any type of modification.
Claims (2)
1. cold drawing die that is used for seamless steel pipe, comprise die sleeve (1) and core rod (2), core rod (2) is placed in die sleeve (1), the bottom of die sleeve (1) has through hole, have the cold-drawn nib that is connected with above-mentioned through hole on core rod (2), described cold-drawn nib is the frustum face, it is characterized in that: the angle α between described cold-drawn nib two stringcourses is 17 °～19 °, and the height of described die sleeve (1) and diameter ratio equate with height and the diameter ratio of core rod (2).
2. a kind of cold drawing die for seamless steel pipe as claimed in claim 1, it is characterized in that: height and the diameter ratio of described die sleeve (1) and core rod (2) are 8:5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220595299 CN202984318U (en) | 2012-11-13 | 2012-11-13 | Cold-drawing mould used for seamless steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220595299 CN202984318U (en) | 2012-11-13 | 2012-11-13 | Cold-drawing mould used for seamless steel tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202984318U true CN202984318U (en) | 2013-06-12 |
Family
ID=48555541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220595299 Expired - Fee Related CN202984318U (en) | 2012-11-13 | 2012-11-13 | Cold-drawing mould used for seamless steel tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202984318U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801575A (en) * | 2014-02-08 | 2014-05-21 | 芜湖鑫力管道技术有限公司 | Die special for cold-drawing on stainless steel composite pipe |
-
2012
- 2012-11-13 CN CN 201220595299 patent/CN202984318U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801575A (en) * | 2014-02-08 | 2014-05-21 | 芜湖鑫力管道技术有限公司 | Die special for cold-drawing on stainless steel composite pipe |
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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: 20130612 Termination date: 20141113 |
|
| EXPY | Termination of patent right or utility model |