CN204060750U - A kind of High strength bolt threaded connection - Google Patents
A kind of High strength bolt threaded connection Download PDFInfo
- Publication number
- CN204060750U CN204060750U CN201420511038.0U CN201420511038U CN204060750U CN 204060750 U CN204060750 U CN 204060750U CN 201420511038 U CN201420511038 U CN 201420511038U CN 204060750 U CN204060750 U CN 204060750U
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- Prior art keywords
- thread
- crest
- nut
- screw
- circular arc
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- Expired - Lifetime
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- 238000005520 cutting process Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000012141 concentrate Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 206010017076 Fracture Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000000641 cold extrusion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- Reinforcement Elements For Buildings (AREA)
- Forging (AREA)
Abstract
The utility model discloses a kind of equivalent strength that is applied to is the prestressed anchor assembly of more than 10.9 grades or the High strength bolt threaded connection of other structures, this High strength bolt threaded connection, be assembled by screw rod and nut, the external screw thread of screw rod and the internal thread of nut are continuous circular arc screw thread, external thread of screw is connected in sequence by circular arc at the bottom of crest and tooth, and described screw rod crest is plane; Described nut inner thread is connected in sequence by first circular arc, tangential straightway and crest, and described nut crest is plane.Adopt this kind of form of thread, difficulty of processing is low, and production efficiency is high, avoids the low stress brittle fracture phenomenon that high-strength material easily occurs when screw thread process; Adopt continuous circular arc screw thread, effectively can reduce stress and concentrate and the probability that occurs micro-crack; The cooperation of inside and outside spiral shell can be more and more tightr with the running of equipment, effectively can avoid the generation loosened.
Description
technical field
The utility model relates to a kind of High strength bolt threaded connection, is applied to prestressed anchor assembly or other structures that equivalent strength is more than 10.9 grades.
background technology
Thread forms common at present has: triangle thread, trapezoidal thread, rectangular thread and saw-tooth thread.The high-strength finish rolling deformed bar that market, domestic prestressing force basis uses, as anchor pole, directly forms screw thread during hot rolling, and screw thread adopts conventional keystone screw thread and discontinuous.Above-mentioned several screw thread has weak point, namely has certain region of stress concentration, and have the reinforcing bar of these screw threads as anchor pole according to rolling, then, under long-term dither load, this kind of anchor pole has the risk of fracture.
Its equivalent strength of high-strength prestress anchor rod component is more than 10.9 grades, yield strength >=the 930MPa of usual material, tensile strength >=1080MPa, hardness is more than 35HRC, adopts traditional form of thread structure, no matter adopts machining or cold extrusion processing, easy generation low stress brittle fracture phenomenon, production and processing efficiency is lower, and produce cutter loss comparatively greatly, cost of production is higher.
summary of the invention
For the deficiencies in the prior art, the utility model provides a kind of difficulty of processing low, and production efficiency is high, effectively can reduce stress and concentrate and the High strength bolt threaded connection occurring micro-crack probability.
For achieving the above object, the utility model is by the following technical solutions: a kind of High strength bolt threaded connection, be assembled by screw rod and nut, the external screw thread of screw rod and the internal thread of nut are continuous circular arc screw thread, external thread of screw is connected in sequence by circular arc at the bottom of crest and tooth, and described crest is plane; Described nut inner thread is connected in sequence by first circular arc, tangential straightway and crest, and described crest is plane.
The circular thread of screw rod adopts roll forming.
The circular thread of screw rod adopts cutting forming.
The circular thread of nut adopts screw tap threaded shaping.
The circular thread of nut adopts cutting forming.
The positive progressive of the technical solution of the utility model is: the form of thread adopting this kind of bindiny mechanism, and difficulty of processing is low, and production efficiency is high, avoid high-strength material at screw thread process time the low stress brittle fracture phenomenon that easily occurs; The production efficiency of nut and screw rod is high, and cost is low, is applicable to producing in enormous quantities; Adopt continuous circular arc screw thread, effectively can reduce stress and concentrate and the probability that occurs micro-crack; Internal thread can be more and more tightr with the running of equipment with coordinating of outer spiral shell, effectively can avoid the generation loosened.
accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is screw rod circular thread schematic diagram.
Fig. 3 is nut circular thread schematic diagram.
1-screw rod in figure, 2-nut, 3-screw rod crest, circular arc at the bottom of 4-tooth, first circular arc of 5-, the tangential straightway of 6-, 7-nut crest.
detailed description of the invention
Be further described the utility model below in conjunction with accompanying drawing: as seen from Figure 1, the utility model is high has opened a kind of High strength bolt threaded connection, and it is made up of screw rod 1 and nut 2, and the screw thread of screw rod 1 and nut 2 is continuous circular arc screw thread.The circular thread of screw rod adopts roll forming, also can adopt cutting forming.
As seen from Figure 2, the continuous circular arc screw thread on described screw rod 1 is external screw thread, is connected in sequence by circular arc 4 at the bottom of screw rod crest 3 and tooth, and described screw rod crest 3 is plane.
As seen from Figure 3, the continuous circular arc screw thread on described nut is internal thread, and be connected in sequence by first circular arc 5, tangential straightway 6 and nut crest 7, described nut crest 7 is plane.The circular thread of nut adopts screw tap threaded shaping, also can adopt cutting forming.
Claims (5)
1. a High strength bolt threaded connection, be assembled by screw rod and nut, it is characterized in that: the external screw thread of screw rod and the internal thread of nut are continuous circular arc screw thread, external thread of screw is connected in sequence by circular arc at the bottom of crest and tooth, and described screw rod crest is plane; Described nut inner thread is connected in sequence by first circular arc, tangential straightway and crest, and described nut crest is plane.
2. High strength bolt threaded connection according to claim 1, is characterized in that: the circular thread of screw rod adopts roll forming.
3. High strength bolt threaded connection according to claim 1, is characterized in that: the circular thread of screw rod adopts cutting forming.
4. High strength bolt threaded connection according to claim 1, is characterized in that: the circular thread of nut adopts screw tap threaded shaping.
5. High strength bolt threaded connection according to claim 1, is characterized in that: the circular thread of nut adopts cutting forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420511038.0U CN204060750U (en) | 2014-09-05 | 2014-09-05 | A kind of High strength bolt threaded connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420511038.0U CN204060750U (en) | 2014-09-05 | 2014-09-05 | A kind of High strength bolt threaded connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204060750U true CN204060750U (en) | 2014-12-31 |
Family
ID=52202287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420511038.0U Expired - Lifetime CN204060750U (en) | 2014-09-05 | 2014-09-05 | A kind of High strength bolt threaded connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204060750U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116877555A (en) * | 2023-06-05 | 2023-10-13 | 中船海为高科技有限公司 | Double-end stud for connecting wind turbine generator blade root and processing method thereof |
-
2014
- 2014-09-05 CN CN201420511038.0U patent/CN204060750U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116877555A (en) * | 2023-06-05 | 2023-10-13 | 中船海为高科技有限公司 | Double-end stud for connecting wind turbine generator blade root and processing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170829 Address after: 450001 No. 311 science Avenue, hi tech Zone, Henan, Zhengzhou Patentee after: HAIWEI ZHENGZHOU HIGH TECHNOLOGY Co.,Ltd. Address before: Beijing Guangzhou road 450015 Henan city of Zhengzhou province No. 126 Patentee before: 713TH Research Institute OF CSIC |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: No. 311, Science Avenue, High-tech Zone, Zhengzhou City, Henan Province, 450000 Patentee after: China Shipbuilding Haiwei High tech Co.,Ltd. Address before: 450001 NO.311, science Avenue, high tech Zone, Zhengzhou City, Henan Province Patentee before: HAIWEI ZHENGZHOU HIGH TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141231 |
|
| CX01 | Expiry of patent term |