CN201579288U - Compound inner die of cold-drawing steel tubes - Google Patents
Compound inner die of cold-drawing steel tubes Download PDFInfo
- Publication number
- CN201579288U CN201579288U CN 200920276388 CN200920276388U CN201579288U CN 201579288 U CN201579288 U CN 201579288U CN 200920276388 CN200920276388 CN 200920276388 CN 200920276388 U CN200920276388 U CN 200920276388U CN 201579288 U CN201579288 U CN 201579288U
- Authority
- CN
- China
- Prior art keywords
- internal mold
- section
- taper
- cold
- inner die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Metal Extraction Processes (AREA)
Abstract
The utility model relates to the production field of cold-drawing steel tubes, in particular to an inner die used in steel tube cold-drawing process, which comprises a compound inner die body. A metering section L11, a conical reducing wall section L12 and a transition section L13 are arranged on an excircle of the compound inner die body, one end of the metering section L11 is provided with a back taper L14, and one end of the transition section L13 is provided with a back taper L15. A threaded connecting rod is arranged at the end face of the transition section L13. Taper alpha of the conical reducing wall section L12 is 6-9 degrees.
Description
Technical field
The utility model relates to the cold drawing steel tube production field, particularly a kind of internal mold that uses in the cold drawing steel tube process.
Background technology
In the cold drawing steel tube production process, existing cold-drawn internal mold has taper internal mold, garden cylindricality internal mold and three kinds of the internal molds of moving about.The taper internal mold as shown in Figure 1, it comprises that two ends are corresponding taper body, the two ends of body cylindrical are respectively equipped with back taper L1, sizing section L2 and taper wall-reducting section L3, are provided with changeover portion L4 between two sections taper wall-reducting section L3.Garden cylindricality internal mold as shown in Figure 2, it comprises the body of a garden cylindricality, the cylindrical of body is sizing wall-reducting section L5, the two ends of sizing wall-reducting section L5 are respectively equipped with back taper L6.Move about internal mold as shown in Figure 3, and it is made up of sizing section L7, taper wall-reducting section L8 and changeover portion L9, and the end of sizing section L7 is provided with back taper L10.
During cold drawing steel tube, the taper internal mold cooperates the arc external mold to form the distortion pass, and garden cylindricality internal mold cooperates the taper external mold to form the distortion pass, and the internal mold that moves about cooperates the external mold that moves about to form the distortion pass to produce cold drawing steel tube.Taper internal mold or garden cylindricality internal mold are to be connected on the pull bar by screw or screw thread in the production process, and pull bar one end is fixed on the pull bar support, bear the distortion pulling force that internal mold passes over, and make internal mold remain on the certain position of deformed area.Move about internal mold because the particularity of self shape does not need pull bar to fix in the production process, and axial normal pressure and friction equilibrium of forces remain on the certain position of deformed area the internal mold that moves about during by distortion.When the steel pipe cold-drawn is produced, coefficient of friction is subjected to the influence of steel pipe material, annealing, pickling and lubricating quality some often to occur to change, frictional force changes when causing being out of shape, destroyed the internal mold balance of axial force of moving about, when frictional force became big, steel pipe was broken, when frictional force diminishes, the internal mold that moves about can not participate in distortion, directly influences tube quality and lumber recovery
Summary of the invention
The purpose of this utility model is to overcome the above-mentioned deficiency of prior art and a kind of compound internal mold for cold drawing steel tubes is provided.
The technical solution of the utility model is: a kind of compound internal mold for cold drawing steel tubes, it comprises a composite internal mould body, on the cylindrical of composite internal mould body, be respectively equipped with sizing section L11, taper wall-reducting section L12 and changeover portion L13, the end of sizing section L11 is provided with back taper L14, and the end of changeover portion L13 is provided with back taper L15.On the end face of changeover portion L13, be provided with whorl brace rod.The tapering a of taper wall-reducting section L12 is 6～9 degree.
The composite internal mould that the utility model provides has overcome the interior shortcoming of certain position scope that the internal mold that moves about can not remain on the deformed area, on the intrinsic basis of the internal mold that moves about, by reducing the tapering of anti-cone angle, the axial friction that internal mold is subjected to when making distortion is greater than the axial thrust load of normal pressure, for the fixing position of internal mold, be connected on the pull bar fixing at internal mold tail end design screw thread.
The utility model compared with prior art has following characteristics:
Internal mold fixed-site when 1, composite internal mould is out of shape, steel pipe sizes is normal after pulling out, and thickness of steel pipe is stable on the length direction, and the thickness of steel pipe fluctuation is very big behind the internal mold draw that moves about.
2, move about internal mold because unfixing, after internal mold was sent into steel pipe and entered the deformed area and pulled out than difficulty and steel pipe, internal mold can fly out or fall on the ground, damage internal mold and personnel on every side.Composite internal mould is connected on the pull bar, sends into the deformed area by pull bar, pulls out the back internal mold and is retained on the pull bar.
3, pull bar is stressed less during the composite internal mould draw, and therefore, the pull bar external diameter can be very little, can produce small-bore size high precision steel tube and thick walled steel tube by cored bar.
4, adopt composite internal mould, supplied materials hollow billet specification diminishes, and can reduce the cold-drawn passage.
Below in conjunction with the drawings and specific embodiments detailed structure of the present utility model is further described.
Description of drawings
Accompanying drawing 3 is the existing internal model structure schematic diagram that moves about;
The composite internal mould structural representation that accompanying drawing 4 provides for the utility model.
The specific embodiment
As shown in Figure 4: a kind of compound internal mold for cold drawing steel tubes, it comprises a composite internal mould body 1, is respectively equipped with sizing section L11, taper wall-reducting section L12 and changeover portion L13 on the cylindrical of composite internal mould body 1.The diameter D of sizing section L11 is 30mm, and length is 10mm, and the end of sizing section L11 is provided with back taper L14, and back taper L14 is 1.5 * 45 °.The length of taper wall-reducting section L12 is 20mm, and tapering a is 7 degree.The length of changeover portion L13 is 10mm, and the end of changeover portion L13 is provided with back taper L15, and back taper L15, back taper L14 are 1.5 * 45 °.Be provided with whorl brace rod 2 on the end face of changeover portion L13, the length of whorl brace rod 2 is 30mm, and diameter of thread d is 18mm.
Claims (2)
1. compound internal mold for cold drawing steel tubes, it is characterized in that: it comprises a composite internal mould body, on the cylindrical of composite internal mould body, be respectively equipped with sizing section L11, taper wall-reducting section L12 and changeover portion L13, the end of sizing section L11 is provided with back taper L14, the end of changeover portion L13 is provided with back taper L15, is provided with whorl brace rod on the end face of changeover portion L13.
2. compound internal mold for cold drawing steel tubes according to claim 1 is characterized in that: the tapering a of taper wall-reducting section L12 is 6～9 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920276388 CN201579288U (en) | 2009-12-05 | 2009-12-05 | Compound inner die of cold-drawing steel tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920276388 CN201579288U (en) | 2009-12-05 | 2009-12-05 | Compound inner die of cold-drawing steel tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201579288U true CN201579288U (en) | 2010-09-15 |
Family
ID=42721280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920276388 Expired - Fee Related CN201579288U (en) | 2009-12-05 | 2009-12-05 | Compound inner die of cold-drawing steel tubes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201579288U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108126994A (en) * | 2017-07-27 | 2018-06-08 | 中国航发哈尔滨东安发动机有限公司 | A kind of thin-wall aluminum alloy tube-drawing mold |
| CN109070166A (en) * | 2016-02-01 | 2018-12-21 | 日进制钢株式会社 | Drawing plug |
| CN113857278A (en) * | 2021-09-29 | 2021-12-31 | 大连开成钢管有限公司 | GY type internal mold for cold-drawing steel pipe |
-
2009
- 2009-12-05 CN CN 200920276388 patent/CN201579288U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109070166A (en) * | 2016-02-01 | 2018-12-21 | 日进制钢株式会社 | Drawing plug |
| CN108126994A (en) * | 2017-07-27 | 2018-06-08 | 中国航发哈尔滨东安发动机有限公司 | A kind of thin-wall aluminum alloy tube-drawing mold |
| CN113857278A (en) * | 2021-09-29 | 2021-12-31 | 大连开成钢管有限公司 | GY type internal mold for cold-drawing steel pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101708508A (en) | Compound internal mold for cold drawing steel tubes | |
| CN104858286A (en) | Spinning device | |
| CN201178030Y (en) | Adjustable wire winding module for transformer coil manufacture | |
| CN201579288U (en) | Compound inner die of cold-drawing steel tubes | |
| JP2012058258A (en) | Method for manufacturing guide tube of nuclear reactor fuel assembly, mandrel for forming guide tube and guide tube obtained | |
| CN103769451B (en) | A kind of method of ultra-thin tubing minor radius bending forming | |
| CN102120227A (en) | Improved cold drawing mould of seamless steel pipe and cold drawing process thereof | |
| CN208662168U (en) | A kind of combination cold drawing die reducing thickness of steel pipe difference | |
| CN202045176U (en) | Improved seamless steel tube cold-drawing die | |
| CN102179928A (en) | Heavy-calibre skeleton plastic pipe winding forming equipment and demoulding method | |
| CN201376007Y (en) | Cold-drawing mold for refining crystalline grains on internal surface of steel pipe | |
| CN219664858U (en) | Spinning drawing machine for spinning steel pipe | |
| CN203972506U (en) | A kind of Tube Drawing mould | |
| CN108971247A (en) | A kind of combination cold drawing die reducing thickness of steel pipe difference | |
| CN213103823U (en) | Double-internal-die cold-drawing device | |
| CN201082438Y (en) | Drafting core head for hollow metal tube | |
| CN205236635U (en) | Tube drawing mould | |
| CN218743986U (en) | Straight groove internal mold structure for seamless steel pipe cold-drawing machine | |
| CN203140428U (en) | Ejection rod of perforating unit | |
| CN204602958U (en) | A kind of spinning machine | |
| CN210701731U (en) | Overlength cold drawing plug device | |
| CN208879363U (en) | A kind of aluminium and aluminium alloy pipes stretching internal model connection structure | |
| CN201308944Y (en) | Tube end sizing and flaring die | |
| CN201768763U (en) | Tube separating barrel and damping extrusion device | |
| CN205020517U (en) | Sizing mill |
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: 20100915 Termination date: 20141205 |
|
| EXPY | Termination of patent right or utility model |