CN203817151U - Special-shaped punching rod capable of solving metal streamlinefault in inner hole of steel pipe - Google Patents
Special-shaped punching rod capable of solving metal streamlinefault in inner hole of steel pipe Download PDFInfo
- Publication number
- CN203817151U CN203817151U CN201420184383.8U CN201420184383U CN203817151U CN 203817151 U CN203817151 U CN 203817151U CN 201420184383 U CN201420184383 U CN 201420184383U CN 203817151 U CN203817151 U CN 203817151U
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- Prior art keywords
- special
- rod
- punching
- inner hole
- steel pipe
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- Expired - Lifetime
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- 239000002184 metal Substances 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 14
- 239000010959 steel Substances 0.000 title claims abstract description 14
- 238000004080 punching Methods 0.000 title abstract description 14
- 238000003325 tomography Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000000641 cold extrusion Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
The utility model provides a special-shaped punching rod capable of solving a metal streamlinefault in an inner hole of a steel pipe, and belongs to the technical field of steel pipe cold extruding and punching. The special-shaped punching rod is characterized by comprising a rod body and a blunted cone, wherein a cylindrical stage is arranged at the end part of the rod body; the blunted cone is arranged at the end part of the stage. As a stage-shaped design is added onthe conical surface atthe front end of the punching rod, the bottom of the hole is stressed during a cold protruding and punching process; the stage is arranged at the periphery of materials to pre-leave a flowing space for metal flow, so that the metal streamline fault does not generate when the punching and extruding process is completed.
Description
Technical field
The utility model relates to steel pipe cold extrusion punching technical field, relates in particular to a kind of special-shaped jumper bar that solves steel tube inner hole metal streamline tomography.
Background technology
Cold-extruded part is produced by comprising: the operations such as cut-out, punching, cold extrusion, drawing, shaping; in actual production; during due to backward end punching processing, metal flow is very fast and without the flowing space; metal streamline is volume depression outside surrounding at the bottom of the hole of endoporus under strong pressure; when rear station pushes again; indeformable when jumper bar protection endoporus is subject to forge extruding, the stressed appearance inside and outside recess of outer volume metal streamline is folding.Product is cut open after corrosion and detected and find that metal streamline tomography appears in endoporus, and the defect of this tomography can cause product under stress or when heat treatment process, because tomography place stress is concentrated and had the risk rupturing.Determined that at present existing picture that existing jumper bar shape causes metal streamline tomography 100% occurs in process of production, and high-end steel tube product does not allow the defect of metal streamline tomography while detecting, so cause 100% product bad.The sole cause that causes metal streamline tomography by existing this class jumper bar front end shape of verification experimental verification repeatedly.
Summary of the invention
For the deficiencies in the prior art, the utility model is to provide a kind of special-shaped jumper bar that solves steel tube inner hole metal streamline tomography.
For achieving the above object, the utility model is achieved by following technical proposals:
A special-shaped jumper bar that solves steel tube inner hole metal streamline tomography, comprises the body of rod, blunted cone, it is characterized in that, described rod end is provided with a cylinder step, stepped ends is provided with blunted cone, for the mobile space of having reserved of metal streamline, there will not be metal streamline to roll up the situation of depression outward.
The extended axis of the horse of the described body of rod, step and blunted cone is on same straight line.
The height of described step equates to the distance of body of rod circumference with step circumference, ensures Uniform Flow longitudinally, radially.
The beneficial effects of the utility model are: the utility model increases the design of step shape at jumper bar front end conical surface place, when cold extrusion punching, bottom, hole is stressed, the reserved flowing space of metal flow in the time that material surrounding formation step is punching, there will not be metal streamline tomography thereby make product punching push rear material.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of special-shaped jumper bar that solves steel tube inner hole metal streamline tomography described in the utility model.
In figure: the 1-body of rod, 2-step, 3-blunted cone.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail.
As shown in Figure 1, a kind of special-shaped jumper bar that solves steel tube inner hole metal streamline tomography, comprises the body of rod 1, blunted cone 3, it is characterized in that, the described body of rod 1 end is provided with a cylinder step 2, and step 2 ends are provided with blunted cone 3.The design principle of this technical scheme is to have added a columniform step 2 between the body of rod 1 and blunted cone 3, in the time of punching, hole substrate streamline flows to the headspace between step 2 and the body of rod 1 top under strong pressure, when later stage cold extrusion processing, there will not be outer volume metal streamline stressed and folding phenomenon inside and outside recess, also just avoided metal streamline tomography completely.
The extended axis of the horse of the described body of rod 1, step 2 and blunted cone 3 is on same straight line.
The height of described step 2 equates to the distance of the body of rod 1 circumference with step 2 circumference, ensures no matter metal streamline radially still longitudinally flows into or flow out, and its flow process equates, stressed even.
That in above-described embodiment and description, describes just illustrates principle of the present utility model and most preferred embodiment; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.
Claims (3)
1. a special-shaped jumper bar that solves steel tube inner hole metal streamline tomography, comprises the body of rod, blunted cone, it is characterized in that, described rod end is provided with a cylinder step, and stepped ends is provided with blunted cone.
2. a kind of special-shaped jumper bar that solves steel tube inner hole metal streamline tomography according to claim 1, is characterized in that: the extended axis of the horse of the described body of rod, step and blunted cone is on same straight line.
3. a kind of special-shaped jumper bar that solves steel tube inner hole metal streamline tomography according to claim 1, is characterized in that: the height of described step equates to the distance of body of rod circumference with step circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420184383.8U CN203817151U (en) | 2014-04-17 | 2014-04-17 | Special-shaped punching rod capable of solving metal streamlinefault in inner hole of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420184383.8U CN203817151U (en) | 2014-04-17 | 2014-04-17 | Special-shaped punching rod capable of solving metal streamlinefault in inner hole of steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203817151U true CN203817151U (en) | 2014-09-10 |
Family
ID=51472693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420184383.8U Expired - Lifetime CN203817151U (en) | 2014-04-17 | 2014-04-17 | Special-shaped punching rod capable of solving metal streamlinefault in inner hole of steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203817151U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109226655A (en) * | 2018-10-26 | 2019-01-18 | 广州小出钢管有限公司 | A kind of processing method of the automobile shock flat recess with tooth flanged pipe |
| CN111922190A (en) * | 2020-07-30 | 2020-11-13 | 东风商用车有限公司 | Stamping die and prestress punching process thereof |
-
2014
- 2014-04-17 CN CN201420184383.8U patent/CN203817151U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109226655A (en) * | 2018-10-26 | 2019-01-18 | 广州小出钢管有限公司 | A kind of processing method of the automobile shock flat recess with tooth flanged pipe |
| CN111922190A (en) * | 2020-07-30 | 2020-11-13 | 东风商用车有限公司 | Stamping die and prestress punching process thereof |
| CN111922190B (en) * | 2020-07-30 | 2021-07-06 | 东风商用车有限公司 | Stamping die and prestress punching process thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 511300 workshop A3, high tech industrial base, East District, Zengjiang street, Zengcheng District, Guangzhou City, Guangdong Province Patentee after: Ming Hao auto metal parts (Guangzhou) Co.,Ltd. Address before: 511300 workshop A3, high tech industrial base, East District, Zengjiang street, Zengcheng City, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU KOIDE KOKAN Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |