CN207764042U - A kind of clamping device carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire - Google Patents
A kind of clamping device carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire Download PDFInfo
- Publication number
- CN207764042U CN207764042U CN201820109080.8U CN201820109080U CN207764042U CN 207764042 U CN207764042 U CN 207764042U CN 201820109080 U CN201820109080 U CN 201820109080U CN 207764042 U CN207764042 U CN 207764042U
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- level
- jaw
- steel wire
- high frequency
- hot
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 63
- 239000010959 steel Substances 0.000 title claims abstract description 63
- 238000009661 fatigue test Methods 0.000 title claims abstract description 26
- 238000005246 galvanizing Methods 0.000 title claims abstract description 20
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000012360 testing method Methods 0.000 claims description 28
- 239000011148 porous material Substances 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 9
- 210000000080 chela (arthropods) Anatomy 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 229920001342 Bakelite® Polymers 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000004637 bakelite Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a kind of clamping devices carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire.The device includes the pedestal cylinder of two symmetrically arranged tubular structures, the connector in pedestal tube inner chamber outer end is blocked respectively, inlay card is arranged in the level-one anchor in the inner cavity of pedestal cylinder and between two level anchor and connector in the two level anchor of pedestal tube inner chamber opposite end respectively；Two level anchor includes nested bushing, two level jaw piece and two level jaw seat successively from inside to outside, is combined by the circular conical surface being mutually matched between two level jaw piece and two level jaw seat；Level-one anchor includes nested level-one jaw piece and level-one jaw seat successively from inside to outside, is combined by the circular conical surface being mutually matched between the level-one jaw piece and level-one jaw seat.The utility model can effectively avoid the retaining part at steel wire both ends from generating damage, and realizing quick, accurate high frequency fatigue test to hot-dip galvanizing steel wire measures.
Description
Technical field
The utility model belongs to the technical field of test device, is more specifically related to a kind of galvanizing that bridge cable uses
Steel wire carries out the clamping device of high frequency fatigue test.
Background technology
The cable of cable-stayed bridge and suspension bridge mainly uses hot-dip galvanized high-strength steel silk, due to bridge cable making in load-bearing bridge
With larger alternating load is subject in the process, so to the Tensile Strength and Elongation of the hot-dip galvanized high-strength steel silk used on bridge cable
It can require corresponding higher.The detection of high frequency fatigue test is carried out to steel wire to provide phase for its designer, manufacturer, user
The test data of pass, in favor of the use of high tensile steel wire and the improvement of performance.Currently, using fatigue tester jaw directly to steel
When the clamping of silk both ends carries out high frequency fatigue test, high tensile steel wire generates damage in retaining part and is broken prior to fatigue failure, no
It can really reflect the fatigue behaviour of high tensile steel wire material.For improve high frequency fatigue test success rate, also someone using fixture come
Clamped wire both ends, but existing high tensile steel wire fixture is directly converted using steel strand anchorage mostly, utilizes steel strand wires
Still steel wire can be caused to damage when anchorage carrys out clamped wire, the measured value of high frequency fatigue test is made less to be connect with time of day
Closely, there is the problem of measurement result inaccuracy, so successful to improve high frequency fatigue test come clamped wire both ends using fixture
The actual effect of rate is not notable.
Invention content
The purpose of this utility model be exactly for the above-mentioned prior art in the presence of shortcoming and a kind of be applicable in is provided
The clamping device of high frequency fatigue test is carried out in hot-dip galvanizing steel wire.The utility model can effectively avoid the clamping part at steel wire both ends
Position generates damage, solves that the measured value of existing high frequency fatigue test is not too close to time of day, measurement result is inaccurate
Problem realizes quick, accurate high frequency fatigue test to hot-dip galvanizing steel wire and measures, can really reflect the material of hot-dip galvanizing steel wire
Expect fatigue behaviour.
The purpose of this utility model can be realized by following technique measures：
The clamping device for being suitable for hot-dip galvanizing steel wire progress high frequency fatigue test of the utility model is symmetrically set including two
The pedestal cylinder for the tubular structure set blocks the connector in pedestal tube inner chamber outer end respectively, and inlay card is in the pedestal respectively
The two level anchor of tube inner chamber opposite end is arranged in the inner cavity of the pedestal cylinder and is located at two level anchor and connect
Level-one anchor between device；The two level anchor include from inside to outside successively nested bushing, two level jaw piece and
Two level jaw seat is combined between the two level jaw piece and two level jaw seat by the circular conical surface being mutually matched；The level-one
Anchor includes nested level-one jaw piece and level-one jaw seat, the level-one jaw piece and level-one jaw successively from inside to outside
It is combined by the circular conical surface being mutually matched between seat.
The inner cavity of two level jaw seat described in the utility model is conical bore, shape is multidiameter structure, the two level pincers
The multi-diameter shaft major diameter section outer diameter and the straight tube lumen pore internal diameter of the pedestal cylinder of mouth seat match（Two level anchor and pedestal in this way
Just inlay card is together for the inner cavity opposite end of cylinder）, the multi-diameter shaft path section of the two level jaw seat is from pedestal cylinder opposite end end
Run through and extend outward in the mounting hole that face is opened up（The end face of pedestal cylinder opposite end and the multi-diameter shaft in two level jaw seat
Large and small diameter section boundary end face fitting contacts to transmit pulling force）, the osculum end of the conical bore terminates at the path section end of multi-diameter shaft
Face（I.e. the osculum end of conical bore is located at opposite end, after connector is connect with fatigue tester, the pulling force of fatigue tester load
Two level jaw seat is passed to through connector, pedestal cylinder, two level jaw seat tension moves outward, i.e. the circle towards two level jaw piece
Frustum stub end moves, three pieces of intermediate plates in the two level jaw piece being combined by same tapered conical face between two level jaw seat
Will gradually it close up, self-locking, and then bushing and steel wire test inside clamping）.
The piece of two level jaw described in the utility model be inner cavity made of being encircled by three pieces of intermediate plates be cylindrical hole, shape is
Circular cone structure, the cylindrical hole internal diameter of two level jaw piece match with the straight tube lumen pore internal diameter of the bushing, two level jaw piece
Frustum of a cone taper is identical as the conical bore taper of two level jaw seat（With taper circular conical surface combine when self-locking may be implemented,
That is blind-mate, centering is accurate, easy to loading and unloading, transmits larger torque）.
The inner cavity of level-one jaw seat described in the utility model is conical bore, shape is multidiameter structure, the level-one pincers
It is clearance fit between the multi-diameter shaft major diameter section outer surface and the straight tube lumen pore inner surface of the pedestal cylinder of mouth seat, the level-one pincers
The multi-diameter shaft path section outer diameter of mouth seat is less than the frustum of a cone stub end outer diameter of the two level jaw piece（Ensure the rank of level-one jaw seat
Terraced axis path section end only contacts with two level jaw piece, transmits pulling force）.
The piece of level-one jaw described in the utility model be inner cavity made of being encircled by three pieces of intermediate plates be cylindrical hole, shape is
Circular cone structure, the cylindrical hole internal diameter of level-one jaw piece and the outer diameter of steel wire test match and cylinder internal surface of hole has saw
Tooth form screw thread（Level-one jaw piece can be facilitated more to fasten the end of effectively clamped wire sample, be also avoided that damage steel wire examination
The retaining part of sample）, the frustum of a cone taper of level-one jaw piece is identical as the conical bore taper of level-one jaw seat（With taper
Self-locking, i.e. blind-mate may be implemented in circular conical surface when combining, centering is accurate, easy to loading and unloading, transmits larger torque）.
Bushing described in the utility model is round tube shape structure, is between the inner hole surface of bushing and the surface of steel wire test
Cross cooperation（The combination of transition cooperation can ensure that bushing is sleeved on steel wire test surface to transmit load securely；Root again
According to the bushing for needing selection bakelite material or aluminium material, the retaining part of steel wire test can be protected from damage）.
Connector described in the utility model is convex shape structure, on the major diameter section of convex shape structure and the surface of path section
It is machined with saw-tooth thread（Being fastenedly connected for connector and fatigue tester may be implemented in the saw-tooth thread of path section, greatly
Being fastenedly connected for connector and pedestal cylinder may be implemented in the saw-tooth thread of diameter section）.
The barrel chamber internal surface of hole of pedestal cylinder outer end is machined with the sawtooth for spinning connector in the present invention
Shape screw thread.（The saw-tooth thread of pedestal tube inner surface and the saw-tooth thread of the convex shape structure major diameter section of connector match,
Realize being fastenedly connected between connector and pedestal cylinder）.
The design principle of the utility model is as follows：
The pedestal that the utility model is symmetrically arranged by two and is connected with fatigue tester by connector
Cylinder, and two-stage anchor in pedestal tube inner chamber come the both ends of clamped wire sample, such fatigue tester institute
The pulling force of load passes to two level jaw seat through connector, pedestal cylinder, and two level jaw seat tension moves outward, i.e., towards two level
The frustum of a cone stub end of jaw piece moves, in the two level jaw piece being combined by same tapered conical face between two level jaw seat
Three pieces of intermediate plates will gradually close up, self-locking, and then clamp inside bushing and steel wire test；Similarly, with two level jaw piece
The pulling force that is transmitted by two level jaw piece of the level-one jaw seat that fits of outer end end face after move outward, i.e., clamped towards level-one
The frustum of a cone stub end movement of mouth piece, in the level-one jaw piece being combined by same tapered conical face between level-one jaw seat
Three pieces of intermediate plates will gradually close up, self-locking, and then the steel wire test inside clamping.During steel wire test is clamped, by
It is not in direct contact in steel wire test and two level jaw piece, steel wire test surface is sleeved on by transition fit system securely
The bushing being made using bakelite material or aluminium material transmits load, and the retaining part of steel wire test can be protected from damage
Wound；Also due to the cylinder internal surface of hole in level-one jaw piece is machined with saw-tooth thread, both facilitated level-one jaw piece more be fastened with
Power clamped wire sample end, be also avoided that damage steel wire test retaining part.Therefore, the utility model can be effective
The retaining part at steel wire both ends is avoided to generate damage, the measured value for solving existing high frequency fatigue test less connects with time of day
Closely, the problem of measurement result inaccuracy.
The advantageous effects of the utility model are as follows：
The utility model can effectively avoid the retaining part at steel wire both ends from generating damage, solve existing high-cycle fatigue examination
The measured value tested is not too close to time of day, the problem of measurement result inaccuracy, and it is quick, accurate to be realized to hot-dip galvanizing steel wire
High frequency fatigue test measure, can really reflect the fatigue of materials performance of hot-dip galvanizing steel wire.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Serial number in figure：1, steel wire test, 2, two level jaw seat, 3, two level jaw piece, 4, bushing, 5, pedestal cylinder, 6, level-one
Jaw seat, 7, level-one jaw piece, 8, connector.
Specific implementation mode
The utility model is further described below in conjunction with attached drawing：
As shown in Figure 1, the clamping device for being suitable for hot-dip galvanizing steel wire progress high frequency fatigue test of the utility model includes
The pedestal cylinder 5 of two symmetrically arranged tubular structures blocks the connector 8 in 5 inner cavity outer end of the pedestal cylinder, blocks respectively respectively
Two level anchor embedded in 5 inner cavity opposite end of the pedestal cylinder is arranged in the inner cavity of the pedestal cylinder 5 and is located at two level
Level-one anchor between anchor and connector 8；The two level anchor includes nested lining successively from inside to outside
Set 4, two level jaw piece 3 and two level jaw seat 2, the circle between the two level jaw piece 3 and two level jaw seat 2 by being mutually matched
The conical surface is combined；The level-one anchor includes nested level-one jaw piece 7 and level-one jaw seat 6 successively from inside to outside, institute
It states and is combined by the circular conical surface being mutually matched between level-one jaw piece 7 and level-one jaw seat 6.
The inner cavity of two level jaw seat described in the utility model 2 is conical bore, shape is multidiameter structure, the two level pincers
The multi-diameter shaft major diameter section outer diameter and the straight tube lumen pore internal diameter of the pedestal cylinder 5 of mouth seat 2 match（Two level anchor and base in this way
Just inlay card is together for the inner cavity opposite end of seat cylinder 5）, the multi-diameter shaft path section of the two level jaw seat 2 is opposite from the pedestal cylinder 5
Run through and extend outward in the mounting hole that the end face at end is opened up（In the end face of 5 opposite end of pedestal cylinder and two level jaw seat 2
Multi-diameter shaft large and small diameter section boundary end face fitting contact transmit pulling force）, the osculum end of the conical bore terminates at multi-diameter shaft
Path section end face（I.e. the osculum end of conical bore is located at opposite end, after connector 8 is connect with fatigue tester, fatigue tester
The pulling force of load passes to two level jaw seat 2 through connector 8, pedestal cylinder 5, and 2 tension of two level jaw seat moves outward, i.e., towards
The frustum of a cone stub end of two level jaw piece 3 moves, with the two level pincers being combined by same tapered conical face between two level jaw seat 2
Three pieces of intermediate plates in mouthful piece 3 will gradually close up, self-locking, and then the bushing 4 inside clamping and steel wire test 1）.
The piece of two level jaw described in the utility model 3 is that inner cavity made of being encircled by three pieces of intermediate plates is cylindrical hole, shape
For circular cone structure, the cylindrical hole internal diameter of two level jaw piece 3 matches with the straight tube lumen pore internal diameter of the bushing 4, two level jaw
The frustum of a cone taper of piece 3 is identical as the conical bore taper of the two level jaw seat 2（With taper circular conical surface combine when may be implemented
Self-locking, i.e. blind-mate, centering is accurate, easy to loading and unloading, transmits larger torque）.
The inner cavity of level-one jaw seat described in the utility model 6 is conical bore, shape is multidiameter structure, the level-one pincers
It is clearance fit between the multi-diameter shaft major diameter section outer surface and the straight tube lumen pore inner surface of the pedestal cylinder 5 of mouth seat 6, the level-one
The multi-diameter shaft path section outer diameter of jaw seat 6 is less than the frustum of a cone stub end outer diameter of the two level jaw piece 3（Ensure level-one jaw seat
6 multi-diameter shaft path section end only contacts with two level jaw piece 3, transmits pulling force）.
The piece of level-one jaw described in the utility model 7 is that inner cavity made of being encircled by three pieces of intermediate plates is cylindrical hole, shape
For circular cone structure, the cylindrical hole internal diameter of level-one jaw piece 7 matches with the outer diameter of steel wire test 1 and cylinder internal surface of hole has
There is saw-tooth thread（Level-one jaw piece 7 can be facilitated more to fasten the end of effectively clamped wire sample 1, be also avoided that damage
The retaining part of steel wire test 1）, the frustum of a cone taper of level-one jaw piece 7 is identical as the conical bore taper of the level-one jaw seat 6
（Self-locking, i.e. blind-mate are may be implemented when being combined with the circular conical surface of taper, and centering is accurate, easy to loading and unloading, transmits larger turn
Square）.
Bushing 4 described in the utility model is round tube shape structure, is between the inner hole surface and the surface of steel wire test 1 of bushing
Transition coordinates（The combination of transition cooperation can ensure that bushing 4 is sleeved on 1 surface of steel wire test to transmit load securely；
Further according to the bushing 4 for needing selection bakelite material or aluminium material, the retaining part of steel wire test 1 can be protected from damage）.
Connector 8 described in the utility model is convex shape structure, in the major diameter section of convex shape structure and the table of path section
Face is machined with saw-tooth thread（Being fastenedly connected for connector 8 and fatigue tester may be implemented in the saw-tooth thread of path section,
Being fastenedly connected for connector 8 and pedestal cylinder 5 may be implemented in the saw-tooth thread of major diameter section）.
The barrel chamber internal surface of hole of 5 outer end of pedestal cylinder is machined with the saw for spinning connector 8 in the present invention
Tooth form screw thread.（The saw-tooth thread phase of the saw-tooth thread of 5 inner surface of pedestal cylinder and the convex shape structure major diameter section of connector 8
Being fastenedly connected between connector 8 and pedestal cylinder 5 is realized in matching）.
Specific use process is as follows for the utility model：
First, the both ends of steel wire test 1 is made to run through from the mounting hole that the end face of 5 opposite end of pedestal cylinder is opened up and steel
The both ends end of silk sample 1 is located in the inner cavity of pedestal cylinder 5；Then, bushing 4 is installed respectively in the both ends end of steel wire test 1,
And be set with two level jaw piece 3 and two level jaw seat 2 successively by the assembly relation of above-mentioned each component, that is, assemble two level anchor,
And preliminary clamping of the completion to steel wire test 1；Then, it is set with level-one jaw piece 7 and one successively in the outer end of two level anchor
Grade jaw seat 6 assembles level-one anchor and completes the fixed clamp to steel wire test 1；Then, 8 type of connector will be stated
In the major diameter section spinning of shape structure to the straight tube lumen pore of 5 outer end of pedestal cylinder, the two is connected tightly by the combination of saw-tooth thread
Gu；Followed by, the path section of 8 convex shape structure of connector is connected with the upper and lower jaws of fatigue tester by saw-tooth thread
It connects；Finally, stress average, stress amplitude and the frequency needed for high frequency fatigue test are set, fatigue tester is started, steel wire is tried
Sample 1 carries out testing fatigue.
Claims (8)
1. a kind of clamping device carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire, it is characterised in that：It includes two right
Claim the pedestal cylinder of the tubular structure of setting（5）, blocked respectively in the pedestal cylinder（5）The connector of inner cavity outer end（8）, block respectively
Embedded in the pedestal cylinder（5）The two level anchor of inner cavity opposite end is arranged in the pedestal cylinder（5）Inner cavity in and be located at
Two level anchor and connector（8）Between level-one anchor；The two level anchor includes embedding successively from inside to outside
The bushing of set（4）, two level jaw piece（3）With two level jaw seat（2）, the two level jaw piece（3）With two level jaw seat（2）Between
It is combined by the circular conical surface being mutually matched；The level-one anchor includes nested level-one jaw piece successively from inside to outside
（7）With level-one jaw seat（6）, the level-one jaw piece（7）With level-one jaw seat（6）Between pass through the circular conical surface phase that is mutually matched
In conjunction with.
2. the clamping device according to claim 1 for carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire, feature exist
In：The two level jaw seat（2）Inner cavity be conical bore, shape is multidiameter structure, the two level jaw seat（2）Multi-diameter shaft
Major diameter section outer diameter and the pedestal cylinder（5）Straight tube lumen pore internal diameter match, the two level jaw seat（2）Multi-diameter shaft path section
From the pedestal cylinder（5）Run through and extend outward in the mounting hole that the end face of opposite end is opened up, the osculum of the conical bore
End terminates at the path section end face of multi-diameter shaft.
3. the clamping device according to claim 1 for carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire, feature exist
In：The two level jaw piece（3）Be inner cavity made of being encircled by three pieces of intermediate plates be cylindrical hole, shape is circular cone structure, two
Grade jaw piece（3）Cylindrical hole internal diameter and the bushing（4）Straight tube lumen pore internal diameter match, two level jaw piece（3）Circular cone
Platform taper and the two level jaw seat（2）Conical bore taper it is identical.
4. the clamping device according to claim 1 for carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire, feature exist
In：The level-one jaw seat（6）Inner cavity be conical bore, shape is multidiameter structure, the level-one jaw seat（6）Multi-diameter shaft
Major diameter section outer surface and the pedestal cylinder（5）Straight tube lumen pore inner surface between be clearance fit, the level-one jaw seat（6）'s
Multi-diameter shaft path section outer diameter is less than the two level jaw piece（3）Frustum of a cone stub end outer diameter.
5. the clamping device according to claim 1 for carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire, feature exist
In：The level-one jaw piece（7）Be inner cavity made of being encircled by three pieces of intermediate plates be cylindrical hole, shape is circular cone structure, one
Grade jaw piece（7）Cylindrical hole internal diameter and steel wire test（1）Outer diameter match and cylinder internal surface of hole have zigzag spiral shell
Line, level-one jaw piece（7）Frustum of a cone taper and the level-one jaw seat（6）Conical bore taper it is identical.
6. the clamping device according to claim 1 for carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire, feature exist
In：The bushing（4）For round tube shape structure, the inner hole surface and steel wire test of bushing（1）Surface between for transition coordinate.
7. the clamping device according to claim 1 for carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire, feature exist
In：The connector（8）For convex shape structure, zigzag is machined in the major diameter section of convex shape structure and the surface of path section
Screw thread.
8. the clamping device according to claim 1 for carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire, feature exist
In：In the pedestal cylinder（5）The barrel chamber internal surface of hole of outer end is machined with for spinning connector（8）Saw-tooth thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820109080.8U CN207764042U (en) | 2018-01-23 | 2018-01-23 | A kind of clamping device carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820109080.8U CN207764042U (en) | 2018-01-23 | 2018-01-23 | A kind of clamping device carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207764042U true CN207764042U (en) | 2018-08-24 |
Family
ID=63181537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820109080.8U Expired - Fee Related CN207764042U (en) | 2018-01-23 | 2018-01-23 | A kind of clamping device carrying out high frequency fatigue test suitable for hot-dip galvanizing steel wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207764042U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779808A (en) * | 2019-12-10 | 2020-02-11 | 哈尔滨工业大学 | High-temperature tensile test fixture suitable for special-shaped section steel wire |
| CN111595695A (en) * | 2020-06-04 | 2020-08-28 | 上海交通大学 | Clearance elimination device and method suitable for low-temperature tension-compression fatigue test |
-
2018
- 2018-01-23 CN CN201820109080.8U patent/CN207764042U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779808A (en) * | 2019-12-10 | 2020-02-11 | 哈尔滨工业大学 | High-temperature tensile test fixture suitable for special-shaped section steel wire |
| CN111595695A (en) * | 2020-06-04 | 2020-08-28 | 上海交通大学 | Clearance elimination device and method suitable for low-temperature tension-compression fatigue test |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.26, Huahua Road, high tech Development Zone, Zhengzhou, Henan Province, 450001 Patentee after: Sinosteel Zhengzhou metal products Research Institute Co.,Ltd. Address before: No.26, Huahua Road, high tech Development Zone, Zhengzhou, Henan Province, 450001 Patentee before: SINOSTEEL ZHENGZHOU RESEARCH INSTITUTE OF STEEL WIRE & STEEL PRODUCTS Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180824 |
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| CF01 | Termination of patent right due to non-payment of annual fee |