CN203324096U - Steel wire fatigue test fixture - Google Patents
Steel wire fatigue test fixture Download PDFInfo
- Publication number
- CN203324096U CN203324096U CN2013203898900U CN201320389890U CN203324096U CN 203324096 U CN203324096 U CN 203324096U CN 2013203898900 U CN2013203898900 U CN 2013203898900U CN 201320389890 U CN201320389890 U CN 201320389890U CN 203324096 U CN203324096 U CN 203324096U
- Authority
- CN
- China
- Prior art keywords
- steel wire
- wedge grip
- wedge
- clamp body
- sample
- 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 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 238000009661 fatigue test Methods 0.000 title claims abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 12
- 230000006378 damage Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
- 235000011613 Pinus brutia Nutrition 0.000 description 2
- 241000018646 Pinus brutia Species 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 239000010421 standard material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
本实用新型涉及一种钢丝疲劳试验夹具，属于试验仪器。楔形夹具体内部的轴承孔内有推力关节轴承，加载头安装在推力关节轴承的内孔内，细牙螺纹夹块安装在楔形夹块体内，楔形夹块体与楔形夹具体内部配合连接，顶紧螺钉与楔形夹块体顶接，夹具体开口端通过两根螺杆和四个锁紧螺母紧固连接，防转销与楔形夹具体插接。本实用新型的优点在于：结构新颖，夹紧可靠，对试样伤害小，使钢丝试样不断裂在夹块钳口内，拆卸方便，不管钢丝试样是否断裂，夹块不会出现夹块松不开现象，解决了夹具不同轴的影响，使钢丝试样不断裂在夹块钳口外边缘。
The utility model relates to a steel wire fatigue test fixture, which belongs to test instruments. There is a thrust joint bearing in the bearing hole inside the wedge-shaped clamp body. The loading head is installed in the inner hole of the thrust joint bearing. The tightening screw is top-connected with the wedge-shaped clamp body, the open end of the clamp body is tightly connected by two screw rods and four lock nuts, and the anti-rotation pin is inserted into the wedge-shaped clamp body. The utility model has the advantages of novel structure, reliable clamping, little damage to the sample, so that the steel wire sample does not break in the jaws of the clamping block, and is easy to disassemble. No matter whether the steel wire sample is broken or not, the clamping block will not be loose The non-opening phenomenon solves the influence of the non-axis of the fixture, so that the steel wire sample does not break at the outer edge of the jaw of the clamp block.
Description
Technical field
The utility model belongs to test apparatus, refers in particular to the novel clamp of a kind of steel strand wires with the individual wire torture test.
Background technology
In the large scale structures such as overhead, Longspan Bridge structure, generally all can adopt prestress wire, steel strand wires bear various load under complicated external environment condition, most importantly alternate load.More and more extensive along with steel strand wires application, require also more and more highlyer to making steel wire that steel strand wires use, usually need to be tested fatigue strength and the fatigue lifetime of steel wire.And the steel wire sample is different from general standard material sample, gripping section is identical with gauge length section diameter same material, therefore very easily from the fixture internal break.The fixture existed at present have common Wedge gripping repacking, also useful steel strand anchorage, although adopt various measures in test, the success ratio of test is all extremely low.Require the test of not rupturing for 2,000,000 times usually just to rupture at hundreds of thousands time steel wire, the fracture position is substantially all in the fixture jaw or the intersection of clamping and non-gripping section, so can not reflect the fatigue behaviour of wire material at all.
Summary of the invention
The utility model provides a kind of steel wire fatigue test clamper, all extremely low with the success ratio that solves common Wedge gripping or steel strand anchorage test, can not reflect the problem of the fatigue behaviour of wire material at all.
The technical solution of the utility model is: in the concrete inner dead eye of wedge grip, thrust articulated bearing is arranged, loading head is arranged in the endoporus of thrust articulated bearing, the fine thread fixture block is arranged in the wedge grip block, the concrete inside of wedge grip block and wedge grip is connected, hold out against screw and wedge grip block apical grafting, the clamp body openend is fastenedly connected by two screw rods and four set nuts, and stop pin and wedge grip are specifically pegged graft.
The utility model has the advantage of: novel structure, reliable clamping, little to the sample injury, the steel wire sample is not broken in the fixture block jaw, convenient disassembly, no matter whether the steel wire sample ruptures, fixture block not there will be the fixture block pine not open phenomenon, solved the impact of fixture out-of-alignment, made the steel wire sample not break at fixture block jaw outward flange.
The accompanying drawing explanation
Fig. 1 is the structural representation of the utility model lower clamp, and upper fixture and lower clamp are identical, therefore omit the structural representation of upper fixture;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the structural representation of the utility model fixture block;
In figure, wedge grip is concrete 1, hold out against screw 2, wedge grip block 3, screw rod 4, set nut 5, loading head 6, fine thread fixture block 7, thrust articulated bearing 8, stop pin 9, steel wire sample 10.
Embodiment
In the dead eye of concrete 1 inside of wedge grip, thrust articulated bearing 8 is arranged, loading head 6 is arranged in the endoporus of thrust articulated bearing 8, fine thread fixture block 7 is arranged in wedge grip block 3, wedge grip block 3 is connected with concrete 1 inside of wedge grip, hold out against screw 2 and wedge grip block 3 apical graftings, clamp body 1 openend is fastenedly connected by two screw rods 4 and four set nuts 5, and stop pin 9 is pegged graft with wedge grip concrete 1.
During test, steel wire sample 10 is sandwiched in the corresponding fine thread fixture block of diameter, with holding out against screw, holds out against the fixture block body, and clamping steel wire sample 10, loading head is connected with HF fatigue testing machine, stop pin is plugged, and the wedge grip block of upper fixture is up pushed away, and steel wire sample 10 gripping sections are put into to the fine thread fixture block, unclamp the wedge grip block, the wedge grip block falls naturally, and steel wire sample 10 is jammed, then holds out against the wedge grip block with holding out against screw.Just has clamped steel wire sample 10 upper ends, and the service test machine descends entablature, steel wire sample 10 lower ends is sent in the fine thread fixture block of lower clamp and held out against the wedge grip block with holding out against screw again, the lower gripping section of clamping steel wire sample 10.The openend screw rod that wedge grip is concrete, with after the set nut hand Screw, is extracted the stop pin of upper and lower fixture out, makes thrust articulated bearing in free state.In software, setting test average load and dynamic loading just can have been tested.
The screw rod of the concrete openend of wedge grip and locking nut screwing, prevent clamp body opening in clamping process, weakens the clamping effect.If clamping force is excessive simultaneously, when fine thread fixture block pine does not open, nut can be unclamped, the concrete opening part of wedge grip opens naturally, and the fine thread fixture block can be easy to unclamp.
The tooth form of fine thread fixture block adopts the fine thread tooth form, and the tooth distance generally is not more than 1.5mm, the transition chamfering that the intersection of upper and lower end face and machining screw tooth will be longer, and the general long 5mm of chamfering, 15 ° of angles, prevent that stress is concentrated.Fixture block length lengthens as far as possible, because in the situation of same clamping force, gripping section is longer, the stress that steel wire sample 10 is held place by toothholder is less, more is not easy from fine thread fixture block internal break.General effective clamping length is greater than 60mm and gets final product.
Because steel wire sample 10 is not only thin but also hard, very responsive to right alignment, so specifically and between loading head add thrust articulated bearing at wedge grip, reduce the impact of fixture disalignment on test, need to tighten and hold out against screw during due to clamping, wedge grip specifically needs anti-rotation, so be provided with stop pin, has clamped rear on-test stop pin to be pulled out before loading.
Claims (1)
1. a steel wire fatigue test clamper, it is levied and is: in the concrete inner dead eye of wedge grip, thrust articulated bearing is arranged, loading head is arranged in the endoporus of thrust articulated bearing, the fine thread fixture block is arranged in the wedge grip block, the concrete inside of wedge grip block and wedge grip is connected, hold out against screw and wedge grip block apical grafting, the clamp body openend is fastenedly connected by two screw rods and four set nuts, and stop pin and wedge grip are specifically pegged graft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203898900U CN203324096U (en) | 2013-07-02 | 2013-07-02 | Steel wire fatigue test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203898900U CN203324096U (en) | 2013-07-02 | 2013-07-02 | Steel wire fatigue test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203324096U true CN203324096U (en) | 2013-12-04 |
Family
ID=49663435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203898900U Expired - Fee Related CN203324096U (en) | 2013-07-02 | 2013-07-02 | Steel wire fatigue test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203324096U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018043A (en) * | 2016-08-11 | 2016-10-12 | 贵州钢绳股份有限公司 | Wire rope disperse head tightening device |
| CN106885729A (en) * | 2017-04-05 | 2017-06-23 | 北京航空航天大学 | The high temperature push-pull fatigue test cramp and method of a kind of flat test piece |
| CN108693198A (en) * | 2018-03-08 | 2018-10-23 | 西南交通大学 | A kind of clamping device and synchrotron radiation in situ imaging fatigue tester |
-
2013
- 2013-07-02 CN CN2013203898900U patent/CN203324096U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018043A (en) * | 2016-08-11 | 2016-10-12 | 贵州钢绳股份有限公司 | Wire rope disperse head tightening device |
| CN106885729A (en) * | 2017-04-05 | 2017-06-23 | 北京航空航天大学 | The high temperature push-pull fatigue test cramp and method of a kind of flat test piece |
| CN108693198A (en) * | 2018-03-08 | 2018-10-23 | 西南交通大学 | A kind of clamping device and synchrotron radiation in situ imaging fatigue tester |
| CN108693198B (en) * | 2018-03-08 | 2024-05-14 | 西南交通大学 | Clamping mechanism and synchrotron radiation in-situ imaging fatigue testing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20150702 |
|
| EXPY | Termination of patent right or utility model |