CN107552696B - Tapered groove thread internal mold - Google Patents
Tapered groove thread internal mold Download PDFInfo
- Publication number
- CN107552696B CN107552696B CN201610543967.3A CN201610543967A CN107552696B CN 107552696 B CN107552696 B CN 107552696B CN 201610543967 A CN201610543967 A CN 201610543967A CN 107552696 B CN107552696 B CN 107552696B
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- thread
- section
- screw thread
- sizing
- internal mold
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- 238000004513 sizing Methods 0.000 claims abstract description 19
- 238000010622 cold drawing Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005491 wire drawing Methods 0.000 abstract description 6
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a tapered groove thread internal mold, which comprises a body, wherein the body is provided with: a thread sizing section; the screw thread becomes the profiled section, the front end of screw thread becomes profiled section with the rear end of screw thread footpath section is connected, and be provided with many taper grooves that are the heliciform setting along the axial of body on the screw thread becomes profiled section, the groove width in taper groove reduces from the past backward gradually. The invention can effectively pre-form the thread in advance in the actual production process, and reduce the friction force of the thread sizing section; meanwhile, the uniform flow of metal during thread forming can be effectively ensured, and the problems of wire drawing and edge curling caused by the rapid flow of the metal at the thread sizing section are avoided.
Description
Technical Field
The invention relates to a tapered groove threaded internal mold.
Background
At present, the conventional thread internal mold has the problems encountered in the current production:
1. the formation of thread side corners and the requirements of phosphating, lubricating and annealing processes are harsh, and the fluctuation of thread side corners is easy to be large (the standard requirements are not met or exceeded).
2. The problem of wire drawing and edge curling of the thread rib is easy to occur.
3. The thread rib is easy to have the problem of edge collapse.
4. The production efficiency is less than or equal to 230 m/h.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a tapered groove thread internal mold which can effectively pre-form threads in advance in the actual production process and reduce the friction force of a thread sizing section; meanwhile, the uniform flow of metal during thread forming can be effectively ensured, and the problems of wire drawing and edge curling caused by the rapid flow of the metal at the thread sizing section are avoided.
The technical scheme adopted by the invention for solving the technical problems is as follows: a tapered slot thread internal die comprising a body having:
a thread sizing section;
the screw thread becomes the profiled section, the front end of screw thread becomes profiled section with the rear end of screw thread footpath section is connected, and be provided with many taper grooves that are the heliciform setting along the axial of body on the screw thread becomes profiled section, the groove width in taper groove reduces from the past backward gradually.
Further, the body still includes the linkage segment that is used for being connected with the cold drawing plug, the rear end of linkage segment with the front end of screw thread sizing section is connected.
Further, the connecting section is of a thread structure.
After the technical scheme is adopted, the tapered groove arranged on the thread primary forming section is gradually narrowed from wide to narrow, so that the thread primary forming can be effectively performed in advance in the actual production process, and the friction force of the thread sizing section is reduced; meanwhile, the uniform flow of metal during thread forming can be effectively ensured, and the problems of wire drawing and edge curling caused by the rapid flow of the metal at the thread sizing section are avoided.
The invention has the following beneficial effects:
1. the side angle of the thread is stable and can be controlled to be +/-10 degrees basically.
2. At present, the problems of wire drawing and edge curling of the thread rib are not found.
3. At present, the problem that the thread rib has the edge collapse is not found.
4. The production efficiency is more than or equal to 380 m/h.
Drawings
Fig. 1 is a schematic structural view of the tapered groove threaded inner die of the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1, a tapered groove thread internal die includes a body having:
a thread sizing section 1; the thread sizing section 1 is mainly used for ensuring that the large diameter size in the threaded pipe and the final forming of the thread meet the technical requirements;
the screw thread becomes the section 2 in advance, the front end of screw thread becomes section 2 in advance with the rear end of screw thread footpath section 1 is connected, and be provided with many taper grooves 21 that are the heliciform setting along the axial of body on the screw thread becomes section 2 in advance, the groove width of taper groove 21 reduces from the past backward gradually.
As shown in fig. 1, the body further includes a connecting section 3 for connecting with the cold-drawn mandrel, and the rear end of the connecting section 3 is connected with the front end of the thread sizing section 1.
As shown in FIG. 1, the connecting section 3 is of a thread structure, the connecting section 3 is M16 × 1.5.5, and the front end of the connecting section 3 is also connected with a solid section with a diameter of 12.
The diameter of the thread sizing section 1 is 20.
The total length of the inner mold is 90 mm; the length of the thread sizing section 1 is 20mm, the length of the thread primary forming section 2 is 35mm, and the length of the connecting section 3 is 30 mm.
The working principle of the invention is as follows:
the taper groove 21 arranged on the thread primary forming section 2 is gradually narrowed from wide to narrow, so that the thread primary forming can be effectively performed in advance in the actual production process, and the friction force of the thread sizing section 1 is reduced; meanwhile, the uniform flow of metal during thread forming can be effectively ensured, and the problems of wire drawing and edge curling caused by the rapid flow of the metal in the thread sizing section 1 are avoided.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A tapered groove thread internal mold is characterized by comprising a body, wherein the body is provided with:
a thread sizing section (1);
screw thread initial forming section (2), the front end of screw thread initial forming section (2) with the rear end of screw thread sizing section (1) is connected, and be provided with many taper slots (21) that are the heliciform setting along the axial of body on screw thread initial forming section (2), the groove width of taper slot (21) reduces gradually from the past backward.
2. The tapered slot internal die as claimed in claim 1, wherein: the body further comprises a connecting section (3) connected with the cold-drawing core rod, and the rear end of the connecting section (3) is connected with the front end of the thread sizing section (1).
3. The tapered slot internal die as claimed in claim 2, wherein: the connecting section is of a thread structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610543967.3A CN107552696B (en) | 2016-07-01 | 2016-07-01 | Tapered groove thread internal mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610543967.3A CN107552696B (en) | 2016-07-01 | 2016-07-01 | Tapered groove thread internal mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107552696A CN107552696A (en) | 2018-01-09 |
| CN107552696B true CN107552696B (en) | 2020-07-17 |
Family
ID=60973338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610543967.3A Active CN107552696B (en) | 2016-07-01 | 2016-07-01 | Tapered groove thread internal mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107552696B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5932428Y2 (en) * | 1981-12-29 | 1984-09-11 | 株式会社松山ベンド製作所 | Tap for rolling |
| CN2396916Y (en) * | 1999-11-23 | 2000-09-20 | 齐长海 | Spiral fluted pressure tap |
| CN201253668Y (en) * | 2008-08-15 | 2009-06-10 | 常州常宝精特钢管有限公司 | Internal die for internal thread steel pipe |
| CN102242754A (en) * | 2010-05-10 | 2011-11-16 | 喜利得股份公司 | Thread-tapping concrete screw |
| JP2012066369A (en) * | 2010-09-27 | 2012-04-05 | Sakai Seiko Kk | Tap with guide |
| KR20160076094A (en) * | 2014-12-22 | 2016-06-30 | 안인규 | Rolling tap |
| CN205763579U (en) * | 2016-07-01 | 2016-12-07 | 常州常宝精特钢管有限公司 | Mould in cone tank screw thread |
-
2016
- 2016-07-01 CN CN201610543967.3A patent/CN107552696B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5932428Y2 (en) * | 1981-12-29 | 1984-09-11 | 株式会社松山ベンド製作所 | Tap for rolling |
| CN2396916Y (en) * | 1999-11-23 | 2000-09-20 | 齐长海 | Spiral fluted pressure tap |
| CN201253668Y (en) * | 2008-08-15 | 2009-06-10 | 常州常宝精特钢管有限公司 | Internal die for internal thread steel pipe |
| CN102242754A (en) * | 2010-05-10 | 2011-11-16 | 喜利得股份公司 | Thread-tapping concrete screw |
| JP2012066369A (en) * | 2010-09-27 | 2012-04-05 | Sakai Seiko Kk | Tap with guide |
| KR20160076094A (en) * | 2014-12-22 | 2016-06-30 | 안인규 | Rolling tap |
| CN205763579U (en) * | 2016-07-01 | 2016-12-07 | 常州常宝精特钢管有限公司 | Mould in cone tank screw thread |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107552696A (en) | 2018-01-09 |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Changzhou Changbao Precision & Special Steel Tube Co., Ltd. Document name: Notification of Publication of the Application for Invention |
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Changzhou Changbao Precision & Special Steel Tube Co., Ltd. Document name: Notification of Patent Invention Entering into Substantive Examination Stage |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Xu Tiantong Document name: Notification of Passing Examination on Formalities |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 213000 No. 558, Yanling East Road, Changzhou City, Jiangsu Province Patentee after: CHANGZHOU CHANGBAO JINGTE STEEL PIPE CO.,LTD. Address before: 213000 No.6 Zhennan Road, Zhenglu Town, Wujin District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU CHANGBAO JINGTE STEEL PIPE CO.,LTD. |