CN203324096U - Steel wire fatigue test fixture - Google Patents

Steel wire fatigue test fixture Download PDF

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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
clamping block
fixture
wedge grip
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
Application number
CN2013203898900U
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Chinese (zh)
Inventor
迟成芳
尹廷林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHANGCHUN RESEARCH INSTITUTE FOR MECHANICAL SCIENCE Co Ltd
Original Assignee
CHANGCHUN RESEARCH INSTITUTE FOR MECHANICAL SCIENCE Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHANGCHUN RESEARCH INSTITUTE FOR MECHANICAL SCIENCE Co Ltd filed Critical CHANGCHUN RESEARCH INSTITUTE FOR MECHANICAL SCIENCE Co Ltd
Priority to CN2013203898900U priority Critical patent/CN203324096U/en
Application granted granted Critical
Publication of CN203324096U publication Critical patent/CN203324096U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a steel wire fatigue test fixture, and belongs to a test instrument. A thrust knuckle bearing is installed in a bearing hole inside a wedge-shaped fixture body, a loading head is installed in an inner hole of the thrust knuckle bearing, a fine thread clamping block is installed in a wedge-shaped clamping block body, the wedge-shaped clamping block body is connected with the interior of the wedge-shaped fixture body in a matched mode, an abutting screw is connected with the wedge-shaped clamping block body in an abutted mode, the open end of the fixture body is connected with four locking nuts in a fastened mode through two threaded rods, and an anti-rotating pin is connected with the wedge-shaped fixture body in an inserted mode. The steel wire fatigue test fixture has the advantages that the structure is novel, clamping is reliable, damage to a sample is little, the steel wire sample does not fracture in a clamping block clamping opening, disassembling is convenient to achieve, the clamping block cannot loosen regardless of whether the steel wire sample fractures or not, the influence of disalignment of the fixture is eliminated, and the steel wire sample does not fracture on the edge of the clamping block clamping opening.

Description

A kind of steel wire fatigue test clamper
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.
CN2013203898900U 2013-07-02 2013-07-02 Steel wire fatigue test fixture Expired - Fee Related CN203324096U (en)

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 (2)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

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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