CN104329346B - A kind of high-strength prestressed anchor bolt - Google Patents
A kind of high-strength prestressed anchor bolt Download PDFInfo
- Publication number
- CN104329346B CN104329346B CN201410525454.0A CN201410525454A CN104329346B CN 104329346 B CN104329346 B CN 104329346B CN 201410525454 A CN201410525454 A CN 201410525454A CN 104329346 B CN104329346 B CN 104329346B
- Authority
- CN
- China
- Prior art keywords
- thread
- tooth
- bolt
- anchor bolt
- prestressed anchor
- 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
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 238000005516 engineering process Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- OTYNBGDFCPCPOU-UHFFFAOYSA-N phosphane sulfane Chemical compound S.P[H] OTYNBGDFCPCPOU-UHFFFAOYSA-N 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 2
- 230000010412 perfusion Effects 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 238000007669 thermal treatment Methods 0.000 claims description 2
- 239000011513 prestressed concrete Substances 0.000 abstract description 5
- 239000004567 concrete Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000004093 laser heating Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/06—Surface treatment of parts furnished with screw-thread, e.g. for preventing seizure or fretting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/30—Wind power
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The present invention relates to a kind of high-strength prestressed anchor bolt, this prestressed anchor bolt is by bolt tooth form data, screw thread and bar portion intermediate zone, Technology for Heating Processing and the improvement of bolt material, change the fatigue life that spiral for prestressed concrete in use exists low, fragility is big, poor toughness, poor flexibility, screw thread installation accuracy is poor, easily loosen, the problem such as poor mechanical property after stretch-draw, succeeding in developing of high-strength prestressed anchor bolt, solve domestic blower foundation and build quoting of advanced technology, the regular screw threads product made from steel that relatively conventional fan basis uses saves reinforcing bar
30%
Above, concrete is saved
40%
Above, earth volume is reduced
50%
, total cost relatively conventional fan basis is saved
25%
Arrive
35%
.Construction period significantly shortens.
Description
Technical field
The present invention relates to a kind of anchor bolt, particularly relate to a kind of wind energy turbine set unit foundation high-strength prestressed anchor bolt.
Background technology
External advanced technology is quoted in the most domestic blower foundation construction, and its basis steel is high-strength deformed steel bar rod；Domestic when using external blower foundation advanced technology, employ spiral for prestressed concrete, this kind of product be a kind of hot rolling type with discontinuous externally threaded straight steel bar, be suitable in concreting process using, collectively form prestressed component with concrete；Spiral for prestressed concrete has the disadvantage in that for blower foundation
1
Though, lever strength high, but material fragility is big, poor toughness, poor flexibility, fatigue life are low；
2
, the discontinuous external screw thread poor dimensional precision of rolling, the installation accuracy of screw thread and nut is poor, easily loosens, and tension performance is poor, and cross section is coarse uneven, is mounted in blower foundation construction during spiral for prestressed concrete use
PVC
Not contacting with concrete inside pipe, after installation, the every spiral to blower foundation applies tension force, owing to the fragility of spiral is big, there occurs delayed fracture applying tension force rear thread reinforcing bar.Make the advanced technology that blower foundation is built, use the high-strength deformed steel bar required rod to stagnate owing to not having to meet.
The fatigue life in use existed for spiral for prestressed concrete is low, fragility is big, poor toughness, poor flexibility, screw thread installation accuracy is poor, easily loosen, the problem such as poor mechanical property after stretching force, and my company have developed blower foundation high-strength prestressed anchor bolt.
Summary of the invention
It is an object of the invention to provide a kind of high-strength prestressed anchor bolt, the advantages such as this bolt has high intensity, not easy fracture, toughness good springiness.
For solving above-mentioned technical problem, technical scheme is as follows:
A kind of high-strength prestressed anchor bolt, it is characterised in that include screw rod and threaded portion, it is characterised in that the tooth form of described threaded portion is:
Tooth form is isosceles trapezoid, and pitch is
4mm
, tooth is high
2.4mm
, central diameter tooth width
2mm
, root of thread radius of corner is
0.5mm
, thread radius of corner is
0.2mm
, thread form angle is
36
°；
Or be: tooth form is isosceles trapezoid, and pitch is
6mm
, tooth is high
3mm
, central diameter tooth width
3mm
, root of thread radius of corner is
0.8mm
, thread radius of corner is
0.3mm
, thread form angle is
36
°；
Or be:: tooth form is isosceles trapezoid, and pitch is
8mm
, tooth is high
2.4mm
, tooth bottom width
4mm
, root of thread radius of corner is
1mm
, thread radius of corner is
0.5mm
, thread form angle is
40
°。
Excessively the locating of described threaded portion and screw rod is arranged
40-50mm
Intermediate zone, the screw thread of intermediate zone by rolling through being progressively transitioned into diameter of thread.
Bolt material oxygen content in steel is less than
10mg/m3
, nitrogen content is less than
12mg/m3
, hydrogen content is less than
2mg/m3
, phosphorus sulfur content is less than
0.020%
。
Bolt Technology for Heating Processing is rapid thermal treatment: firing rate reaches
100
℃
/s
Above.
Beneficial effects of the present invention:
Succeeding in developing of high-strength prestressed anchor bolt, solves domestic blower foundation and builds quoting of advanced technology, and the regular screw threads product made from steel that relatively conventional fan basis uses saves reinforcing bar
30%
Above, concrete is saved
40%
Above, earth volume is reduced
50%
, total cost relatively conventional fan basis is saved
25%
Arrive
35%
.Construction period significantly shortens.
Accompanying drawing explanation
Below with reference to accompanying drawing, the specific embodiment of the present invention is described in further detail, wherein:
Figure
1
It it is a kinds of structures schematic diagram of anchor bolt of the present invention；
Figure
2
It it is the another kind of type structure schematic diagram of anchor bolt of the present invention；
Figure
3
It it is the screw thread schematic diagram of anchor bolt of the present invention；
Figure
4
It is the first tooth form data of anchor bolt of the present invention；
Figure
5
It is the second tooth form data of anchor bolt of the present invention；
Figure
6
It is the third tooth form data of anchor bolt of the present invention；
Figure
7
It is screw thread and the bar portion transition schematic diagram of anchor bolt of the present invention.
Detailed description of the invention
Embodiment
1
A kind of high-strength prestressed anchor bolt, including screw rod
1
And threaded portion
2
, figure
1
With
2
It is two kinds of common prestressed anchor bolts respectively, figure
1
It is to use hex nut, figure
2
It is to use connector to connect.
Bolt is a kind of typical many breach part, the many factors such as structure, tooth form size, material and manufacturing process by bolt significantly is affected by its fatigue behaviour, according to mechanics factor specific to bolt connector, the screw thread ditch of bolt is the centrostigma of stress under load effect outside bolt, screw thread ditch diameter is closer to the diameter of round steel during rolling, bearing capacity is the biggest, the most beneficially roll forming, but thread height affects the most again the intensity of tooth form.By the Strength co-mputation to tooth form, Strength co-mputation to bolt minimum diameter, scientific and reasonable experiment, the accurate determination root of thread diameter simulated, radius of corner, thread form angle, i.e. meet requirement of strength be also satisfied rolled thread processing technological requirement, obtained by rolling experiment many times and mechanical property test
4000
The mechanical performance data of multiple bolts and tooth form data, finally determine the crab-bolt tooth form data of three kinds of pitch.
Figure
4
It is the rolling central diameter tooth form data in Ф 28-Ф 40 correspondence: tooth form is isosceles trapezoid, and pitch is 4mm, tooth height 2.4mm, central diameter tooth width 2mm, root of thread radius of corner is 0.5mm, and thread radius of corner is 0.2mm, and thread form angle (the adjacent two tooth top-cross angles of screw thread) is 36 °.
Figure
5
It is the rolling central diameter tooth form data in Ф 45-Ф 60 correspondence: tooth form is isosceles trapezoid, and pitch is 6mm, tooth height 3mm, central diameter tooth width 3mm, root of thread radius of corner is 0.8mm, and thread radius of corner is 0.3mm, and thread form angle (the adjacent two tooth top-cross angles of screw thread) is 36 °.
Figure
6
It is that rolling central diameter is at Ф
40-
Ф
60
, and tooth form data corresponding during punching perfusion high strength grout in rock mass: tooth form is isosceles trapezoid, and pitch is
8mm
, tooth is high
2.4mm
, tooth bottom width
4mm
, root of thread radius of corner is
1mm
, thread radius of corner is
0.5mm
, thread form angle (the adjacent two tooth top-cross angles of screw thread) is
40
°。
In addition to screw thread ditch, the threaded bolt in both ends affects the transition position that another weak part of bolt strength is screw thread and bar portion, and when design, transition position is formed without the sudden change in cross section, have employed
40
~
50mm
The intermediate zone of left and right, by rolling central diameter progressively to diameter of thread, eliminates the generation of stress concentration point, improves the bolt suitability to objective environment.Such as figure
7
Shown in.
Mechanical performance that high-strength prestressed anchor bolt can have and mechanical property, lean on following some ensure:
1.
Having excellent alloy material, oxygen content in steel is less than
10mg/m3
, nitrogen content is less than
12mg/m3
, hydrogen content is less than
2mg/m3
, phosphorus sulfur content is less than
0.020%
.The sublimate of cold rolling high-strength prestressed anchor bolt steel, low alloying, microalloying ensure that the engineering structure part adaptability to environment and the obdurability of material from source.
The design of threads geometrical parameters, it is ensured that the moulding process requirement of requirement of strength and cold rolling, the tooth form of design is isosceles trapezoid, and thread form angle is
18
° and
20
° being prone to roll forming, centring property is good, and at root of the tooth, intensity is high.The cold rolling of screw thread be
ZA28-63
Type or
ZA28-125
Room temperature roll forming on type screw-rolling machine.
The mechanical property reaching high-strength prestressed anchor bolt realizes on sensing heating rapid thermal processing technique equipment.Sensing heating rapid thermal processing technique can significantly improve the mechanical property of steel, improves the surface quality of steel.End thread and screw bolt are at laser heating, and the full-automatic heat treatment production line quench, being tempered completes modifier treatment.The firing rate of bolt can reach
100
℃
/s
Above, during the heating quenching of steel, bolt is screw type linear motion when running status, can keep bolt original precision thread surface, and bolt heats in air of low density therein media environment.Owing to bolt is being higher than
850
DEG C the hot conditions lower time of staying be less than
8
Second, bolt surface can be only formed slight compact oxidation layer, it is ensured that the original precision of screw thread.There is this sensing heating rapid thermal processing technique equipment just to achieve the technique being first molded after-baking of bolt, i.e. ensure that the precision of bolt in turn ensure that the high intensity of bolt.
It will be recognized by those skilled in the art, on the premise of without departing from protection scope of the present invention, above-mentioned embodiment can be carried out various amendment, change and combine, and think this amendment, change and combine within the scope of originality thought.
Claims (4)
1. a high-strength prestressed anchor bolt, including screw rod and threaded portion, it is characterised in that the tooth form of described threaded portion is:
The tooth form data that screw rod rolling central diameter is corresponding when Φ 28mm-Φ 40mm: tooth form is isosceles trapezoid, and pitch is 4mm, tooth height 2.4mm, central diameter tooth width 2mm, and root of thread radius of corner is 0.5mm, and thread radius of corner is 0.2mm, and thread form angle is 36 °；
The tooth form data that screw rod rolling central diameter is corresponding when Ф 45mm-Ф 60mm: tooth form is isosceles trapezoid, and pitch is 6mm, tooth height 3mm, central diameter tooth width 3mm, and root of thread radius of corner is 0.8mm, and thread radius of corner is 0.3mm, and thread form angle is 36 °；
Screw rod rolling central diameter is at Ф 40mm-Ф 60mm, and tooth form data corresponding during punching perfusion high strength grout in rock mass: tooth form is isosceles trapezoid, and pitch is 8mm, tooth height 2.4mm, tooth bottom width 4mm, root of thread radius of corner is 1mm, thread radius of corner is 0.5mm, and thread form angle is 40 °.
2. high-strength prestressed anchor bolt as claimed in claim 1 a kind of, it is characterised in that the transition position of described threaded portion and screw rod arranges the intermediate zone of 40-50mm, the screw thread of intermediate zone by rolling through being progressively transitioned into diameter of thread.
3. a kind of high-strength prestressed anchor bolt as claimed in claim 1, it is characterised in that bolt material oxygen content in steel is less than 10mg/m3, nitrogen content is less than 12mg/m3, hydrogen content is less than 2mg/m3, phosphorus sulfur content is less than 0.020%.
4. a kind of high-strength prestressed anchor bolt as claimed in claim 1, it is characterised in that bolt Technology for Heating Processing is rapid thermal treatment: firing rate reaches 100 DEG C/more than s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410525454.0A CN104329346B (en) | 2014-10-09 | 2014-10-09 | A kind of high-strength prestressed anchor bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410525454.0A CN104329346B (en) | 2014-10-09 | 2014-10-09 | A kind of high-strength prestressed anchor bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104329346A CN104329346A (en) | 2015-02-04 |
| CN104329346B true CN104329346B (en) | 2016-08-17 |
Family
ID=52404130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410525454.0A Expired - Fee Related CN104329346B (en) | 2014-10-09 | 2014-10-09 | A kind of high-strength prestressed anchor bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104329346B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065410A (en) * | 2015-07-23 | 2015-11-18 | 南通汇能电力科技有限公司 | High-strength bolt for tension control structure |
| CN106498856B (en) * | 2016-11-28 | 2018-07-27 | 柳州欧维姆工程有限公司 | A kind of engineering tensioning system of the two halves formula with thread |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1141232A1 (en) * | 1981-05-06 | 1985-02-23 | Myaskovskij Evgenij G | Method of making treaded joint |
| JP4025851B1 (en) * | 2007-04-17 | 2007-12-26 | 株式会社アルケミー | Thread section deformed steel bar |
| RU2470198C1 (en) * | 2011-06-23 | 2012-12-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный индустриальный университет" (ФГБОУ ВПО"МГИУ") | Movable threaded connection with load equalisation along thread turns |
| CN102352884B (en) * | 2011-10-14 | 2013-03-20 | 山东焱鑫矿用材料加工有限公司 | Steel used for non-cold-working connection |
| CN202520747U (en) * | 2012-01-17 | 2012-11-07 | 天津市天铁轧二制钢有限公司 | Hot-rolled high-strength anchor bolt for wind power foundation |
| CN103286246B (en) * | 2013-05-16 | 2015-06-24 | 湖北德克特种异型高强螺栓有限公司 | Method for manufacturing high-strength screws with fine threads for wind-driven generator foundations |
| CN204140604U (en) * | 2014-10-09 | 2015-02-04 | 青海金阳光特种钢材股份有限公司 | A kind of high-strength prestressed anchor bolt |
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2014
- 2014-10-09 CN CN201410525454.0A patent/CN104329346B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN104329346A (en) | 2015-02-04 |
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Granted publication date: 20160817 Termination date: 20211009 |