CN106018078A - Displacement extension clamping device for measuring axial tensile deformation of steel cable at high temperature and using method of displacement extension clamping device - Google Patents
Displacement extension clamping device for measuring axial tensile deformation of steel cable at high temperature and using method of displacement extension clamping device Download PDFInfo
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- CN106018078A CN106018078A CN201610581843.4A CN201610581843A CN106018078A CN 106018078 A CN106018078 A CN 106018078A CN 201610581843 A CN201610581843 A CN 201610581843A CN 106018078 A CN106018078 A CN 106018078A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
Abstract
The invention discloses a displacement extension clamping device for measuring axial tensile deformation of a steel cable at high temperature and a using method of the displacement extension clamping device. The displacement extension clamping device for measuring the axial tensile deformation of the steel cable at high temperature comprises an upper clamp, a lower clamp and a high-temperature extensometer, wherein each of the upper clamp and the lower clamp comprises a U-shaped tube clamp, a V-shaped claw, bolts, a base and high-temperature nuts; U-shaped tube clamps sleeve a sample; two ends of each U-shaped tube clamp are respectively connected with the two corresponding bolts; each V-shaped claw is further arranged on the corresponding base; the U-shaped tube clamps and the V-shaped claws oppositely fasten to clamp the sample; the high-temperature nuts are tightened through the bolts, so that the sample, the U-shaped tube clamps and the V-shaped claws cannot slide relatively; the high-temperature extensometer is provided with two extension rods; a blade contact is arranged at the top end of each extension rod; the extension rods are adjusted so that the two blade contacts can be respectively inlaid in wedge-shaped grooves formed in the surfaces of the top ends of the two U-shaped tube clamps; high-temperature deformation in a gauge length section of the sample is transmitted to the extension rods; and test data are recorded by the high-temperature extensometer.
Description
Technical field
The present invention relates to building structural materials experimental technique field, be specifically related to measure cable wire axial tension under a kind of high temperature and become
The displacement of shape is extended clamping device and using method thereof.
Background technology
Prestressed stretch-draw steel construction has the highest structure efficiency.The current bearing capacity for this class formation under fire
Research is main based on method for numerical simulation, and the accuracy of the mechanical behavior under high temperature index of material is to affect method for numerical simulation
The important step of reliability.Cable wire, as the core component of prestressed stretch-draw steel construction, mainly obtains it by experimental test
Mechanical behavior under high temperature index.At present, owing to being affected by factors such as temperature, test apparatus, component specifications, material is high
It is more difficult that temperature mechanical property test tests relative cold test, and the foil gauge measuring technology under room temperature is no longer desirable for measuring
The stretching axial deformation that sample occurs in stove hot environment, generally uses displacement device of extending to realize body of heater external pelivimetry steel
Rope displacement at high temperature.So, reduce displacement and extend the mechanical transmission errors of device, accurately obtain sample and exist
Deformation under hot environment is the key technology of cable wire high temperature material test.
At present, in the high temperature material test carried out both at home and abroad, under high temperature, the deformation measuring device of test specimen mostly is side-plug-in height
Temperature extensometer, this device is used together with supporting high temperature furnace, for cable wire (such as steel strand wires, steel tendon, steel wire rope)
This kind of cylindrical geometric body, it is impossible to add according to the regulation of " Metal Materials At High Temperature stretching test method " GB/T4338-2006
Work becomes " machining sample ", and this extensometer is in use primarily present two problems: 1, use high-temperature extensometer to measure steel
Twisted wire (being formed by many steel wire spirality are stranded) and steel tendon (arranged in parallel or the most twisted together by many steel wires)
During the deformation of sample, the elongation of the deformation recorded actually individual wire, rather than the elongation of whole stock cable wire；2, cable wire
How to be made up of 5mm or 7mm steel wire, be similar to point cantact with extensometer ends contact scope, in cable wire elongation process,
Easily there is Relative sliding between extensometer ends points and specimen surface, cause sample axial deformation test error in data relatively
Greatly, it is impossible to set up accurate mechanical behavior under high temperature index system.Therefore, a kind of novel measurement steel under high temperature is invented
The displacement of rope axial tension deformation is extended clamping device, can the most firmly clamp sample, then with extensometer with the use of,
Not only make conventional high-temperature extensometer can be applicable to the cable wire of different size, but also solve extensometer in process of the test
The Relative sliding problem existed between end and specimen surface, is effectively improved the feasibility of test and the accurate of result of the test
Property.
Summary of the invention
It is an object of the invention to the deficiency overcoming above-mentioned prior art to exist, propose one under high temperature, measure cable wire axle
Extend clamping device and using method thereof to the displacement of stretcher strain, utilize this device can effectively clamp cable wire examination
Sample, produces synchronous shift with sample, and by the bar of extending being secured to, deformation reaches extensometer, obtain sample high temperature
Deformation values in gauge length during tension test, establishes base for setting up the cable wire each mechanical performance index system under drawing by high temperature
Plinth.
The technical solution used in the present invention is: under a kind of high temperature, the displacement of measurement cable wire axial tension deformation is extended and clamped dress
Put, including upper fixture, lower clamp and high-temperature extensometer；
Described upper fixture and lower clamp all include U-tube folder, V-type pawl, bolt, base, high temperature nut；Described U-shaped
Pipe clamp is set on sample, and U-tube folder two ends connect two bolts respectively, are provided with and above-mentioned bolt phase in described base
The screw of coupling, bolt through base inner bolt hole and is connected with high temperature nut, base is additionally provided with V-type pawl, U-tube
Folder and V-type pawl phase make-up are to blocking sample, and high temperature nut is tightened by bolt so that sample, U-tube in process of the test
Folder does not haves relative slip with V-type pawl three；
Described high-temperature extensometer is provided with two bars of extending, and masthead end of extending is provided with blade contact, regulates bar of extending, makes two
Individual blade contact is able to embed in the wedge shape hole slot that two U-tube folder top end surfaces are offered, by the gauge length section of sample
High temperature deformation amount pass to bar of extending, and by high-temperature extensometer record test data.
As preferably, described displacement clamping device of extending uses nickel gold high temperature alloy to make, and high-temperature behavior is good, it is possible to protect
Demonstrate,prove work normally and efficiently in 0～800 DEG C of temperature range.
As preferably, being provided with transition arc bottom described V-type pawl, inner surface is provided with burr.
U-tube of the present invention folder is used for gripping sample, and internal diameter size is according to institute's test specimens diameter design；Top end surface bores
Hole, embeds for the blade contact of boom end of extending, and produces linkage with fixture and records high temperature deformation.Meanwhile, U-tube folder
Two ends are connected to form one with two bolts.Arranging two V-type pawls and the screw matched with bolt on base, bolt is worn
The screw crossing base both sides is connected with high temperature nut, and fastening nut fixes sample.V-type pawl arranges two, with base even
It is integrated.
Measure the displacement of cable wire axial tension deformation under a kind of high temperature to extend the using method of clamping device, including following step
Rapid:
(1) when carrying out cable wire high temperature tension test, first by the band female thread anchor cup at sample two ends by stud and ten thousand
Can connect by material testing machine, fixing sample；
(2) according to existing high-temperature extensometer gauge length, press from both sides by the U-tube of fixture and V-type pawl phase make-up is to blocking examination
Sample, high temperature nut, through the screw of base both sides, is screwed on bolt clamping sample, is fixed to by the bolt at its two ends respectively
The upper gauge length end of sample；
(3) in like manner, the U-tube of lower clamp being pressed from both sides and V-type pawl phase make-up is to blocking sample, the bolt at its two ends passes
The screw of base both sides, is screwed in high temperature nut on bolt clamping sample respectively, is fixed to the lower gauge length end of sample；Upper folder
Tool, lower clamp are placed in pipe vertical high temperature furnace；
(4) transition arc that can prevent producing stress concentration bottom V angle it is provided with bottom V-type pawl,；Inner surface is provided with increasing
Add the burr of friction between fixture and sample, it is to avoid produce sliding between fixture and sample so that fixture has good folder
Hold performance；
(5) the blade contact of upper and lower for high-temperature extensometer two boom ends of extending is embedded the wedge shape of U-tube folder top end surface
In hole slot, sample is during drawing by high temperature is elongated, and bar of extending links along with the fixture being fixed on sample marking distance section produces,
Obtain the high temperature deformation amount in sample marking distance section；The boring of U-tube clamp surface makes to extend and will not produce sliding between bar and fixture,
Ensure that the bar synchronous shift with sample marking distance section of extending.
Beneficial effect: apparatus of the present invention have simple in construction, easy for installation, clamping is reliable, the features such as resistance to elevated temperatures is good.
When carrying out the mechanical behavior under high temperature test of the multiply rod type such as prestressed cable, strand type sample, high-temperature extensometer is used to survey
During amount sample deformation, due to extend boom end blade contact and specimen surface cannot be in close contact generation sliding and extensometer without
Method measures the axial deformation of whole stock cable wire, causes measurement result to there is error.In test process, sample is installed one group
Fixture, with high-temperature extensometer with the use of, owing to holder is reliable, sample marking distance section can be fixed on closely；Meanwhile,
Fixture uses nickel gold high temperature alloy to make, and high-temperature behavior is good.When sample marking distance section deforms, fixture energy and sample
Keep synchronous shift, and by bar of extending, deformation is reached extensometer, record sample high temperature deformation amount.
Apparatus of the present invention meet the needs of prestressed cable mechanical behavior under high temperature test, accurately measure sample samming in stove
Section high temperature deformation, it is ensured that the accuracy of data, for carry out further tension structure under high temperature fire resistance design with
Analysis lays the foundation.
Accompanying drawing explanation
Fig. 1 is that displacement of the present invention is extended clamping device use figure；
Fig. 2 is that displacement of the present invention is extended clamping device structural representation；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is that U-tube of the present invention presss from both sides schematic diagram.
Detailed description of the invention
Below in conjunction with detailed description of the invention and accompanying drawing, the present invention will be further described:
As Figure 1-4, the displacement measuring the deformation of cable wire axial tension under a kind of high temperature is extended clamping device 12, including on
Fixture, lower clamp and high-temperature extensometer 10；
Described upper fixture and lower clamp all include U-tube folder 5, V-type pawl 6, bolt 7, base 8, high temperature nut 9；
Described U-tube folder 5 is set on sample 3, and U-tube is pressed from both sides 5 two ends and connected two bolts 7 respectively, in described base 8
Being provided with the screw matched with above-mentioned bolt 7, bolt 7 is through base inner bolt hole and is connected with high temperature nut 9, base
On be additionally provided with V-type pawl 6, U-tube folder 5 and V-type pawl 6 phase make-up are to blocking sample 3, and high temperature nut 9 passes through bolt
7 tighten so that in process of the test, sample 3, U-tube are pressed from both sides 5 and do not had relative slip with V-type pawl 6 three；
Described high-temperature extensometer 10 is provided with two bar 10-1 that extend, and bar 10-1 top of extending is provided with blade contact 10-2,
Regulate the bar 10-1 that extends, make two blade contact 10-2 be able to embed two U-tube and press from both sides what 5 top end surfaces were offered
In wedge shape hole slot 11, the high temperature deformation amount in the gauge length section of sample 3 is passed to the bar 10-1 that extends, and is extended by high temperature
Meter 10 record test data.
Described displacement extend clamping device use nickel gold high temperature alloy make, high-temperature behavior is good, it is possible to ensure at 0～800 DEG C
Work normally and efficiently in temperature range.Being provided with transition arc bottom described V-type pawl, inner surface is provided with burr.
Measure the displacement of cable wire axial tension deformation under a kind of above-mentioned high temperature to extend the using method of clamping device, including following
Step:
(1) when carrying out cable wire high temperature tension test, first by the band female thread anchor cup 2 at sample 3 two ends by stud 1
It is connected with omnipotent material testing machine, fixing sample 3；
(2) according to existing high-temperature extensometer 10 gauge length, with the U-tube of fixture press from both sides 5 and V-type pawl 6 phase make-up to
Blocking sample 3, high temperature nut 9, through the screw of base 8 both sides, is screwed on bolt 7 by the bolt 7 at its two ends respectively
Clamping sample 3, is fixed to the upper gauge length end of sample 3；
(3) in like manner, the U-tube of lower clamp is pressed from both sides 5 and V-type pawl 6 phase make-up to blocking sample 3, the bolt at its two ends
7 screws passing base 8 both sides, are screwed in high temperature nut 9 on bolt 7 clamping sample 3 respectively, are fixed to sample 3
Lower gauge length end；Upper fixture, lower clamp are placed in pipe vertical high temperature furnace 4；
(4) transition arc that can prevent producing stress concentration bottom V angle it is provided with bottom V-type pawl 6,；Inner surface is provided with
Increase the burr of friction between fixture and sample, it is to avoid produce sliding between fixture and sample so that fixture has good
Gripping performance；
(5) high-temperature extensometer about 10 two is extended bar 10-1 end blade contact 10-2 embed U-tube folder 5
In the wedge shape hole slot 11 of top end surface, sample 3 is during drawing by high temperature is elongated, and bar 10 of extending is along with being fixed on examination
The fixture of sample gauge length section produces linkage, obtains the high temperature deformation amount in sample 3 gauge length section；U-tube is pressed from both sides 5 surface drillings and is made
Extend and sliding between bar 10-1 and fixture, will not be produced, it is ensured that the bar 10-1 synchronous shift with sample 3 gauge length section of extending.
The above is only the preferred embodiment of the present invention, it should be pointed out that: for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also
Should be regarded as protection scope of the present invention.
Claims (4)
1. the displacement measuring the deformation of cable wire axial tension under a high temperature is extended clamping device, it is characterised in that: include
Fixture, lower clamp and high-temperature extensometer；
Described upper fixture and lower clamp all include U-tube folder, V-type pawl, bolt, base, high temperature nut；Described U-shaped
Pipe clamp is set on sample, and U-tube folder two ends connect two bolts respectively, are provided with and above-mentioned bolt phase in described base
The screw of coupling, bolt through base inner bolt hole and is connected with high temperature nut, base is additionally provided with V-type pawl, U-tube
Folder and V-type pawl phase make-up are to blocking sample, and high temperature nut is tightened by bolt so that sample, U-tube in process of the test
Folder does not haves relative slip with V-type pawl three；
Described high-temperature extensometer is provided with two bars of extending, and masthead end of extending is provided with blade contact, regulates bar of extending, makes two
Individual blade contact is able to embed in the wedge shape hole slot that two U-tube folder top end surfaces are offered, by the gauge length section of sample
High temperature deformation amount pass to bar of extending, and by high-temperature extensometer record test data.
The displacement measuring the deformation of cable wire axial tension under high temperature the most according to claim 1 is extended clamping device, its
Be characterised by: described displacement extend clamping device use nickel gold high temperature alloy make.
The displacement measuring the deformation of cable wire axial tension under high temperature the most according to claim 1 is extended clamping device, its
It is characterised by: being provided with transition arc bottom described V-type pawl, inner surface is provided with burr.
4. extend folder according to the displacement measuring the deformation of cable wire axial tension under a kind of high temperature described in claim 1,2 or 3
Hold the using method of device, it is characterised in that: comprise the following steps:
(1) when carrying out cable wire high temperature tension test, first by the band female thread anchor cup at sample two ends by stud and ten thousand
Can connect by material testing machine, fixing sample；
(2) according to existing high-temperature extensometer gauge length, press from both sides by the U-tube of fixture and V-type pawl phase make-up is to blocking examination
Sample, high temperature nut, through the screw of base both sides, is screwed on bolt clamping sample, is fixed to by the bolt at its two ends respectively
The upper gauge length end of sample；
(3) in like manner, the U-tube of lower clamp being pressed from both sides and V-type pawl phase make-up is to blocking sample, the bolt at its two ends passes
The screw of base both sides, is screwed in high temperature nut on bolt clamping sample respectively, is fixed to the lower gauge length end of sample；Upper folder
Tool, lower clamp are placed in pipe vertical high temperature furnace；
(4) transition arc that can prevent producing stress concentration bottom V angle it is provided with bottom V-type pawl,；Inner surface is provided with increasing
Add the burr of friction between fixture and sample, it is to avoid produce sliding between fixture and sample so that fixture has good folder
Hold performance；
(5) the blade contact of upper and lower for high-temperature extensometer two boom ends of extending is embedded the wedge shape of U-tube folder top end surface
In hole slot, sample is during drawing by high temperature is elongated, and bar of extending links along with the fixture being fixed on sample marking distance section produces,
Obtain the high temperature deformation amount in sample marking distance section；The boring of U-tube clamp surface makes to extend and will not produce sliding between bar and fixture,
Ensure that the bar synchronous shift with sample marking distance section of extending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610581843.4A CN106018078A (en) | 2016-07-21 | 2016-07-21 | Displacement extension clamping device for measuring axial tensile deformation of steel cable at high temperature and using method of displacement extension clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610581843.4A CN106018078A (en) | 2016-07-21 | 2016-07-21 | Displacement extension clamping device for measuring axial tensile deformation of steel cable at high temperature and using method of displacement extension clamping device |
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| CN106018078A true CN106018078A (en) | 2016-10-12 |
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|---|---|---|---|
| CN201610581843.4A Pending CN106018078A (en) | 2016-07-21 | 2016-07-21 | Displacement extension clamping device for measuring axial tensile deformation of steel cable at high temperature and using method of displacement extension clamping device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404538A (en) * | 2016-11-16 | 2017-02-15 | 北方工业大学 | Hot double drawing experiment heating apparatus and hot double drawing experiment heating method |
| CN106823579A (en) * | 2017-03-28 | 2017-06-13 | 武汉立为工程技术有限公司 | A kind of improved mist eliminator flushing Water pipe bracket |
| CN107121278A (en) * | 2017-07-10 | 2017-09-01 | 内蒙金属材料研究所 | A kind of test device and method of testing for ensureing load test for fastener |
| CN108020466A (en) * | 2017-12-21 | 2018-05-11 | 吉林大学 | For the split type miniature extensometer of small-sized original position stretching instrument stretcher strain measurement |
| CN108458923A (en) * | 2018-06-13 | 2018-08-28 | 广州锐谱检测有限公司 | A kind of conical head rope rig tension test fixture |
| CN108956281A (en) * | 2018-06-04 | 2018-12-07 | 中国航发北京航空材料研究院 | A kind of fixation device of sheet metal drawing by high temperature extensometer |
| CN109060518A (en) * | 2018-10-29 | 2018-12-21 | 常熟正昊电子科技有限公司 | A kind of tensile test fixture of long test specimen |
| CN111854593A (en) * | 2020-06-22 | 2020-10-30 | 同济大学 | Digital sensor based on multistage deformation surmounts early warning |
| CN112710559A (en) * | 2019-10-25 | 2021-04-27 | 中国航发商用航空发动机有限责任公司 | High-temperature mechanical test device and extensometer auxiliary assembly thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404538A (en) * | 2016-11-16 | 2017-02-15 | 北方工业大学 | Hot double drawing experiment heating apparatus and hot double drawing experiment heating method |
| CN106404538B (en) * | 2016-11-16 | 2023-09-12 | 北方工业大学 | Heating device and heating method for thermal double-pull experiment |
| CN106823579A (en) * | 2017-03-28 | 2017-06-13 | 武汉立为工程技术有限公司 | A kind of improved mist eliminator flushing Water pipe bracket |
| CN107121278A (en) * | 2017-07-10 | 2017-09-01 | 内蒙金属材料研究所 | A kind of test device and method of testing for ensureing load test for fastener |
| CN108020466A (en) * | 2017-12-21 | 2018-05-11 | 吉林大学 | For the split type miniature extensometer of small-sized original position stretching instrument stretcher strain measurement |
| CN108020466B (en) * | 2017-12-21 | 2024-02-02 | 吉林大学 | Split type miniature extensometer for measuring stretching deformation of small-sized in-situ stretching instrument |
| CN108956281A (en) * | 2018-06-04 | 2018-12-07 | 中国航发北京航空材料研究院 | A kind of fixation device of sheet metal drawing by high temperature extensometer |
| CN108458923A (en) * | 2018-06-13 | 2018-08-28 | 广州锐谱检测有限公司 | A kind of conical head rope rig tension test fixture |
| CN109060518A (en) * | 2018-10-29 | 2018-12-21 | 常熟正昊电子科技有限公司 | A kind of tensile test fixture of long test specimen |
| CN112710559A (en) * | 2019-10-25 | 2021-04-27 | 中国航发商用航空发动机有限责任公司 | High-temperature mechanical test device and extensometer auxiliary assembly thereof |
| CN112710559B (en) * | 2019-10-25 | 2022-06-24 | 中国航发商用航空发动机有限责任公司 | High-temperature mechanical test device and extensometer auxiliary assembly thereof |
| CN111854593A (en) * | 2020-06-22 | 2020-10-30 | 同济大学 | Digital sensor based on multistage deformation surmounts early warning |
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