CN108971248A - A kind of inner die for cold-drawn process for eliminating steel pipe inside spin - Google Patents
A kind of inner die for cold-drawn process for eliminating steel pipe inside spin Download PDFInfo
- Publication number
- CN108971248A CN108971248A CN201811050418.8A CN201811050418A CN108971248A CN 108971248 A CN108971248 A CN 108971248A CN 201811050418 A CN201811050418 A CN 201811050418A CN 108971248 A CN108971248 A CN 108971248A
- Authority
- CN
- China
- Prior art keywords
- section
- wall
- circular cone
- reducting
- cylinder
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 24
- 239000010959 steel Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000003801 milling Methods 0.000 claims abstract description 10
- 238000009827 uniform distribution Methods 0.000 claims abstract description 5
- 238000010622 cold drawing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
The present invention relates to a kind of inner die for cold-drawn process for eliminating steel pipe inside spin, it includes an interior mould body, and the equal wall section of the first circular cone wall-reducting section, the first cylinder, changeover portion, the second circular cone wall-reducting section and the equal wall section of the second cylinder are successively arranged before and after the outer surface of interior mould body；The cone angle of first circular cone wall-reducting section is 2~10 degree, and the cone angle beta of the second circular cone wall-reducting section is 8~15 degree, and the cone angle of the first circular cone wall-reducting section is less than the cone angle beta of the second circular cone wall-reducting section；In the equal wall section outer round surface circumference uniform distribution milling many places plane of the first cylinder, the milling depth a of plane is 0.1~0.5mm.The present invention has the advantages that the inside spin rib that can eliminate steel pipe.
Description
Technical field
The present invention relates to a kind of inner die for cold-drawn process more particularly to a kind of inner die for cold-drawn process for eliminating steel pipe inside spin.
Background technique
The technology of cold drawing accurate seamless steel pipe is exactly by hot rolled seamless steel tube by large hydraulic drawbench, using specific
Cold-drawing technology carries out the technology of plastic deformation production precision tube.Make inside and outside mould of the steel pipe from drawbench with powerful pulling capacity
It is extracted in tool, using the mode of extruding, steel tube blank is made to reach higher dimensional accuracy and surface smoothness, be a kind of no cutting
The method of processing technology.Cold drawing accurate seamless steel pipe can directly carry out honing, rolling and processing, be used for Barrel of Hydraulic Cylinders.Cold drawn steel
The characteristics of pipe, has the utilization rate of metal material high, high production efficiency, the good mechanical property of steel pipe.
Hot rolled seamless steel tube passes through hot rolling, perforates.Blank inside pipe wall after perforation has apparent longitudinal inside spin corrugation
Line.This inside spin rib is difficult to eliminate by existing cylindrical or conical internal model draw.If directlying adopt this cold-drawn
Steel pipe carries out honing, rolling, and is used as the cylinder barrel of oil cylinder, will have a huge impact to the quality of oil cylinder.
Summary of the invention
For disadvantage mentioned above, the purpose of the present invention is to provide the elimination steel pipes that one kind can eliminate the inside spin rib of steel pipe
The inner die for cold-drawn process of inside spin.
Technology contents of the invention are a kind of inner die for cold-drawn process for eliminating steel pipe inside spin, it includes an interior mould body,
The equal wall section of the first circular cone wall-reducting section, the first cylinder, changeover portion, the second circular cone, which are successively arranged, before and after the outer surface of interior mould body subtracts wall
Section and the equal wall section of the second cylinder；The cone angle of first circular cone wall-reducting section is 2~10 degree, the cone angle beta of the second circular cone wall-reducting section for 8~
15 degree, and the cone angle of the first circular cone wall-reducting section is less than the cone angle beta of the second circular cone wall-reducting section；In the equal wall section outer circle table of the first cylinder
Face circumference uniform distribution milling many places plane, the milling depth a of plane are 0.1~0.5mm.
The present invention has the advantage that compared with prior art are as follows:
(1), the inner die for cold-drawn process includes twice circular cone wall-reducting section and the equal wall section of twice cylinder.Compared to existing inner die for cold-drawn process, subtract
The length of wall section increases, that is, causes to be broken due to reducing the extrusion stress of internal model circular conical surface, and avoid steel pipe excessive because once deforming,
The draw passage of steel pipe can be reduced.
(2), the equal wall section outer round surface circumference uniform distribution milling many places plane of the first cylinder of inner die for cold-drawn process, when draw, steel pipe
When section equal by the first cylinder, the plane of milling and the angle of cut of outer circle cut continuous inside spin rib open, pull out through multi-pass
System can eliminate the inside spin of steel pipe.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is schematic diagram in A-A direction in Fig. 1.
Fig. 3 is B-B direction schematic diagram in Fig. 2.
Specific embodiment
As shown in Figure 1, Figure 2 and Figure 3, a kind of elimination steel pipe inside spin for the drawn tube that draw aperture is φ 125
Inner die for cold-drawn process, it include an interior mould body 1, be successively arranged before and after the outer surface of interior mould body 1 first circular cone wall-reducting section L1,
The equal wall section L2 of first cylinder, changeover portion L3, the second circular cone wall-reducting section L4 and the equal wall section L5 of the second cylinder；First circular cone wall-reducting section L1
Length be 72mm, the cone angle of the first circular cone wall-reducting section L1 is 6 degree；The diameter of the equal wall section L2 of first cylinder is φ 123mm, long
Degree is 20mm；The diameter of changeover portion L3 is φ 118.5mm, length 3mm；The length of second circular cone wall-reducting section L4 is 15mm, the
The cone angle beta of two circular cone wall-reducting section L4 is 12 degree, and the cone angle of the first circular cone wall-reducting section is less than the cone angle beta of the second circular cone wall-reducting section；
The diameter of the equal wall section L5 of second cylinder is φ 125mm, length 30mm；In the equal wall section L2 outer round surface circumference uniform distribution of the first cylinder
The milling depth a of plane L6 at milling 16, plane L6 are 0.3mm.
First circular cone wall-reducting section L1, the equal wall section L2 of the first cylinder, the second circular cone wall-reducting section L4 and the equal wall section L5 of the second cylinder
Outer round surface need to refine to Ra0.2, to reduce the frictional force between internal model and steel pipe, equal round-corner transition at the angle of cut；Interior calligraphy or painting model
The inner hole 2 of body 1 is being fixedly connected for internal model and plug, and diameter is φ 52mm, guarantees inner hole 2 and the first circular cone wall-reducting section
The concentricity of the equal wall section L2 of L1, the first cylinder, the second circular cone wall-reducting section L4 and the equal wall section L5 of the second cylinder are φ 0.03mm.
Claims (1)
1. a kind of inner die for cold-drawn process for eliminating steel pipe inside spin, it includes an interior mould body, before and after the outer surface of interior mould body
It is successively arranged the equal wall section of the first circular cone wall-reducting section, the first cylinder, changeover portion, the second circular cone wall-reducting section and the equal wall section of the second cylinder；
The cone angle of first circular cone wall-reducting section is 2~10 degree, and the cone angle beta of the second circular cone wall-reducting section is 8~15 degree, and the first circular cone subtracts wall
Cone angle beta of the cone angle of section less than the second circular cone wall-reducting section；It is flat in the equal wall section outer round surface circumference uniform distribution milling many places of the first cylinder
Face, the milling depth a of plane are 0.1~0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811050418.8A CN108971248A (en) | 2018-09-10 | 2018-09-10 | A kind of inner die for cold-drawn process for eliminating steel pipe inside spin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811050418.8A CN108971248A (en) | 2018-09-10 | 2018-09-10 | A kind of inner die for cold-drawn process for eliminating steel pipe inside spin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108971248A true CN108971248A (en) | 2018-12-11 |
Family
ID=64545911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811050418.8A Pending CN108971248A (en) | 2018-09-10 | 2018-09-10 | A kind of inner die for cold-drawn process for eliminating steel pipe inside spin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108971248A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695842A (en) * | 2005-05-20 | 2005-11-16 | 天津理工大学 | Method for designing die of cold-drawn steel tube with internal thread |
| CN101708508A (en) * | 2009-12-05 | 2010-05-19 | 衡阳华菱钢管有限公司 | Compound internal mold for cold drawing steel tubes |
| CN102120227A (en) * | 2011-02-22 | 2011-07-13 | 浙江健力股份有限公司 | Improved cold drawing mould of seamless steel pipe and cold drawing process thereof |
| CN202984317U (en) * | 2012-12-24 | 2013-06-12 | 浙江工贸职业技术学院 | Seamless steel pipe integral forming die |
| CN107891068A (en) * | 2017-12-19 | 2018-04-10 | 王家聪 | Improve the cold drawing die of steel tube inner hole spiral defect |
| CN208758348U (en) * | 2018-09-10 | 2019-04-19 | 江阴市洪腾机械有限公司 | A kind of inner die for cold-drawn process for eliminating steel pipe inside spin |
-
2018
- 2018-09-10 CN CN201811050418.8A patent/CN108971248A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695842A (en) * | 2005-05-20 | 2005-11-16 | 天津理工大学 | Method for designing die of cold-drawn steel tube with internal thread |
| CN101708508A (en) * | 2009-12-05 | 2010-05-19 | 衡阳华菱钢管有限公司 | Compound internal mold for cold drawing steel tubes |
| CN102120227A (en) * | 2011-02-22 | 2011-07-13 | 浙江健力股份有限公司 | Improved cold drawing mould of seamless steel pipe and cold drawing process thereof |
| CN202984317U (en) * | 2012-12-24 | 2013-06-12 | 浙江工贸职业技术学院 | Seamless steel pipe integral forming die |
| CN107891068A (en) * | 2017-12-19 | 2018-04-10 | 王家聪 | Improve the cold drawing die of steel tube inner hole spiral defect |
| CN208758348U (en) * | 2018-09-10 | 2019-04-19 | 江阴市洪腾机械有限公司 | A kind of inner die for cold-drawn process for eliminating steel pipe inside spin |
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| PB01 | Publication | ||
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