CN205483801U - Tensile fatigue test device of high tensile steel wire - Google Patents
Tensile fatigue test device of high tensile steel wire Download PDFInfo
- Publication number
- CN205483801U CN205483801U CN201620237789.7U CN201620237789U CN205483801U CN 205483801 U CN205483801 U CN 205483801U CN 201620237789 U CN201620237789 U CN 201620237789U CN 205483801 U CN205483801 U CN 205483801U
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- steel wire
- fatigue test
- protective sleeve
- sheath
- protection set
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Abstract
The utility model discloses a tensile fatigue test device of high tensile steel wire. Wherein, this sheath includes the anchor clamps sheath that is equipped with between anchor clamps and the steel wire in high frequency fatigue testing machine. The outer protective sheath on anchor clamps is hugged closely including the inboard inlayer protective sheath and the outside of hugging closely on the steel wire to the anchor clamps sheath. It prevents gliding serration between inlayer protective sheath and the outer protective sheath to be provided with on the outer protective sheath medial surface. The utility model discloses high, the good reliability of success rate that has stretch -proofing fatigue test, simple structure is convenient with the dismantlement, and to the little effect of sample injury.
Description
Technical field
This utility model relates to bridge field, particularly to a kind of high tensile steel wire tensile fatigue test device being applied to load-bearing bridge.
Background technology
In the field such as cable-stayed bridge, suspension bridge, cable plays carrying bogie beam action.At present, relatively conventional cable mainly uses high strength steel silk to be main.High tensile steel wire, during the use of load-bearing bridge, subjects bigger alternate load, and this is accomplished by the stretch-proof fatigue behaviour to high tensile steel wire and proposes requirements at the higher level.Therefore, high tensile steel wire, in factory inspection and acceptance or scientific research process, is required for it is carried out tensile fatigue test, to check its fatigue strength and fatigue life.But, high tensile steel wire sample is different from general standard material sample, and wherein gripping section is identical with the diameter of gauge length section, material is identical.Therefore, in tensile fatigue test, high tensile steel wire is easily from fixture internal break, and the success rate causing test is the most extremely low.After constantly experiment, the test that 2,000,000 times do not rupture usually has hundreds of thousands time steel wire fracture, and fracture position is the most all in fixture jaw or the intersection of clamping and non-clamping section, so can not reflect the fatigue behaviour of wire material at all.It addition, existing employing high tensile steel wire fixture is typically Wedge gripping repacking, the most useful steel strand anchorage, these measures can not significantly improve success rate and the structure complexity of test, installs inconvenience, and versatility is poor.
Utility model content
In view of the above problems, the purpose of this utility model is that the success rate providing a kind of stretch-proof fatigue test is high, highly reliable, simple in construction and convenient disassembly, and the high tensile steel wire tensile fatigue test device little to sample injury.
For achieving the above object, a kind of high tensile steel wire tensile fatigue test device that this utility model provides, wherein, it is included in the fixture sheath being provided with between the fixture in HF fatigue testing machine and steel wire.Fixture sheath includes the outer layer protective sleeve that the internal layer being close on steel wire inner side protection set and outside are close on fixture.The serration preventing sliding between internal layer protection set and outer layer protective sleeve it is provided with on outer layer protective sleeve medial surface.
In some embodiments, one end of internal layer protection set is provided with the first taper face, the other end of internal layer protection set is provided with the first sphere matrix shoulder block.It is provided with the second taper face on one end of outer layer protective sleeve, the outer layer protective sleeve other end is provided with the second sphere matrix shoulder block.Thus; first taper face and the second taper face are arranged on interior outer jointing jacket front end surface a bit of minimum position; effect is gradually to discharge compressive stress by its elasticity; stress mutation is changed into a gradient; improve the stress mutation problem of clamping and non-clamping section intersection; the success rate solving common Wedge gripping or steel strand anchorage test is the most extremely low; the problem that at all can not reflect the fatigue behaviour of wire material; the success rate achieving stretch-proof fatigue test is high, highly reliable, and the effect little to sample injury.
In some embodiments, the end of steel wire is provided with it is close to the first sphere matrix shoulder block and the pier nose of the second sphere matrix shoulder block.Thus, interior outer jointing jacket rear end arranges the first sphere matrix shoulder block and the first sphere matrix shoulder block, and arranges sphere pier nose at steel wire tail end, and pier nose radian is identical with sheath shoulder block radian, and pier nose is fitted with shoulder block, increases curable grip, prevents test specimen sliding.Achieve the effect of simple in construction and convenient disassembly.
In some embodiments, internal layer protection set is made for fiberglass or aluminum material；Described outer layer protective sleeve is that steel bushing is made.Thus, using fiberglass or aluminum material is that internal layer protection set is to reduce the rigid damage to steel wire.It addition, serration to be arranged on increase resistance inside steel bushing, prevent sliding between ectonexine protection set.
The beneficial effects of the utility model are that to have the success rate of stretch-proof fatigue test high, highly reliable, simple in construction and convenient disassembly, and the effect little to sample injury.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is internal structure schematic diagram of the present utility model；
Fig. 3 is the structural representation of this practicality outer layer protective sleeve；
Fig. 4 is the structural representation of this practicality internal layer protection set.
Detailed description of the invention
Below in conjunction with the accompanying drawings utility model is described in further detail.
HF fatigue testing machine is used for being measured metal, alloy material and the component (such as operation joint, fastener, screw part etc.) stretching, compression or the fatigue properties of tension and compression stress alternation, fatigue life, precrack and crack expansion test under room temperature state thereof.HF fatigue testing machine, after being equipped with corresponding test fixture, can carry out the three point bending test under sinusoidal loading, four-point bending test, light sheet tension test, heavy-gauge sheeting tension test, strengthening steel bar tension test, chain tension test, fastener test, connecting rod test, torsional fatigue test, the test of bending composite fatigue, mutual repeated bend test, CT test, CCT test, gear fatigue test.
As Figure 1-4, a kind of high tensile steel wire tensile fatigue test device, it is included in the fixture in HF fatigue testing machine 4 and the fixture sheath 2 being provided with between steel wire 1.Fixture sheath 2 includes the outer layer protective sleeve 5 that the internal layer being close on steel wire 1 inner side protection set 6 and outside are close on fixture.The serration 8 preventing sliding between internal layer protection set 6 and outer layer protective sleeve 5 it is provided with on outer layer protective sleeve 5 medial surface.It is provided with the first taper face 11 on one end of internal layer protection set 6, the other end of internal layer protection set 6 is provided with the first sphere matrix shoulder block 9.It is provided with the second taper face 12 on one end of outer layer protective sleeve 5, outer layer protective sleeve 5 other end is provided with the second sphere matrix shoulder block 10.First taper face 11 and the second taper face 12 are arranged on interior outer jointing jacket front end surface a bit of minimum position; effect is gradually to discharge compressive stress by its elasticity; stress mutation is changed into a gradient, improves the stress mutation problem of clamping and non-clamping section intersection.It is provided with on the end of steel wire 1 and is close to the first sphere matrix shoulder block 9 and pier nose 7 of the second sphere matrix shoulder block 10.Interior outer jointing jacket rear end arranges the first sphere matrix shoulder block 9 and the first sphere matrix shoulder block 9, and arranges sphere pier nose 7 at steel wire 1 tail end, and pier nose 7 radian is identical with sheath shoulder block radian, and pier nose 7 is fitted with shoulder block, increases curable grip, prevents steel wire 1 sliding.Internal layer protection set 6 is made for fiberglass or aluminum material, and outer layer protective sleeve 5 is made for steel bushing.Using fiberglass or aluminum material is that internal layer protection set 6 is to reduce the rigid damage to steel wire 1.It addition, serration 8 to be arranged on increase resistance inside steel bushing, prevent sliding between ectonexine protection set 5.
Add man-hour: (1) protects the processing of set: the size of inside and outside protection set can determine according to grip of testing machine and steel wire 1 diameter.Outer layer steel bushing should have higher hardness, and thickness is not less than 4mm, and length (not including front end gradient part) should be greater than fixture length；Inner layer glass steel (aluminum) is protected length and be should be greater than the length of outer layer steel bushing, thickness 1.5～2mm, and internal diameter is equal to the internal diameter (Φ 5mm or Φ 7mm) of test steel wire 1.Inside and outside protection set tail end makes spherical concave surface, and smooth-going connects, and forms shoulder block.Arranging serration 8 inside steel sheath and increase resistance, inside and outside protection set is symmetrical cutting away half after machining, and should cut a little material when cutting open more so that clamp firm.
(2) test specimen makes, and steel wire 1 tail end of test uses the mode of cold-heading or hot pier to be fabricated to sphere pier nose 7, and the radian of steel wire 1 sphere pier nose 7 is identical with the spherical concave surface of inside and outside protection set tail end, just fits during installation.When making pier nose 7, although steel wire 1 local being had damage, but is clamped by front end, tail end stress has greatly reduced, and falls far short from its limit stress destroyed, as long as therefore the chucking power of fixture is enough, steel wire 1 would not break at pier nose 7.Pier nose 7 and shoulder block can reduce the slip that steel wire 1 produces because of stress change, under alternate load effect, can reduce heating.
Installation process: first install internal layer protection set 6 during test; install the most successively, during installation, notice that steel wire 1 pier nose 7 concave surface spherical with interior outer jointing jacket shoulder block is fitted completely, in fixture length range, should not have folder sky; Adjustment Tests machine lower clamp chucking power, steps up interior outer jointing jacket.Outer layer protective sleeve 5 is installed afterwards, as method is with internal layer protection set 6.The upper and lower clip holding force of last Adjustment Tests machine, makes clamping consolidate firm.Certain tensile force can be applied before formal test, make sheath and steel wire 1 fit completely, form entirety.After completing, it is possible to carry out high frequency tensile fatigue test.
Above-described is only embodiments more of the present utility model.For the person of ordinary skill of the art, on the premise of creating design without departing from this utility model, it is also possible to making some deformation and improvement, these broadly fall into the protection domain of utility model.
Claims (4)
1. a high tensile steel wire tensile fatigue test device, it is characterised in that be included in the fixture sheath being provided with between the fixture in HF fatigue testing machine and steel wire；
Described fixture sheath includes the outer layer protective sleeve that the internal layer being close on steel wire inner side protection set and outside are close on fixture；
The serration preventing sliding between internal layer protection set and outer layer protective sleeve it is provided with on described outer layer protective sleeve medial surface.
A kind of high tensile steel wire tensile fatigue test device the most according to claim 1, it is characterised in that be provided with the first taper face on one end of described internal layer protection set, be provided with the first sphere matrix shoulder block on the other end of internal layer protection set；
It is provided with the second taper face on one end of described outer layer protective sleeve, the outer layer protective sleeve other end is provided with the second sphere matrix shoulder block.
A kind of high tensile steel wire tensile fatigue test device the most according to claim 2, it is characterised in that be provided with on the end of described steel wire and be close to the first sphere matrix shoulder block and the pier nose of the second sphere matrix shoulder block.
4. according to a kind of high tensile steel wire tensile fatigue test device described in claim 1,2 or 3, it is characterised in that described internal layer protection set is made for fiberglass or aluminum material；Described outer layer protective sleeve is that steel bushing is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620237789.7U CN205483801U (en) | 2016-03-25 | 2016-03-25 | Tensile fatigue test device of high tensile steel wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620237789.7U CN205483801U (en) | 2016-03-25 | 2016-03-25 | Tensile fatigue test device of high tensile steel wire |
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| Publication Number | Publication Date |
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| CN205483801U true CN205483801U (en) | 2016-08-17 |
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| CN201620237789.7U Expired - Fee Related CN205483801U (en) | 2016-03-25 | 2016-03-25 | Tensile fatigue test device of high tensile steel wire |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186752A (en) * | 2019-05-17 | 2019-08-30 | 天津大学 | A kind of anchorage for justifying pultrusion CFRP bar drawing and Experimental on acoustic emission for light |
| CN110186751A (en) * | 2019-05-17 | 2019-08-30 | 天津大学 | A kind of clamping plate type anchorage for light circle pultrusion CFRP bar drawing test |
| CN111175124A (en) * | 2020-02-25 | 2020-05-19 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Sheath and protection method for overhead conductor metal single wire during tensile property test |
-
2016
- 2016-03-25 CN CN201620237789.7U patent/CN205483801U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186752A (en) * | 2019-05-17 | 2019-08-30 | 天津大学 | A kind of anchorage for justifying pultrusion CFRP bar drawing and Experimental on acoustic emission for light |
| CN110186751A (en) * | 2019-05-17 | 2019-08-30 | 天津大学 | A kind of clamping plate type anchorage for light circle pultrusion CFRP bar drawing test |
| CN111175124A (en) * | 2020-02-25 | 2020-05-19 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Sheath and protection method for overhead conductor metal single wire during tensile property test |
| CN111175124B (en) * | 2020-02-25 | 2024-09-27 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Sheath and protection method for metal single wire of overhead conductor during tensile property test |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20190325 |