CN110186753A - A kind of bar samples stretching clamping device - Google Patents
A kind of bar samples stretching clamping device Download PDFInfo
- Publication number
- CN110186753A CN110186753A CN201910572380.9A CN201910572380A CN110186753A CN 110186753 A CN110186753 A CN 110186753A CN 201910572380 A CN201910572380 A CN 201910572380A CN 110186753 A CN110186753 A CN 110186753A
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- 238000012360 testing method Methods 0.000 claims abstract description 83
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 12
- 239000010936 titanium Substances 0.000 description 12
- 229910052719 titanium Inorganic materials 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 239000007769 metal material Substances 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of bar samples to stretch clamping device, the identical bar samples fixture of two structures, and two bar samples fixtures are respectively used to the clamping end of clamping bar samples two；Two bar samples fixtures are respectively and fixedly installed in testing machine upper fixture block and testing machine lower fixture block；Each bar samples fixture includes the first semi-circumference fixture and the second semi-circumference fixture, and the first semi-circumference fixture and the second semi-circumference fixture are semicircular arc structure；The structure of first semi-circumference fixture and the second semi-circumference fixture is identical, and is symmetricly set on bar samples clamping end circumference two sides；The inner arc surface of first semi-circumference fixture and the second semi-circumference fixture is bonded setting with the exterior arc surface of bar samples clamping end two sides respectively；The adjusting that bar samples fixture clamps radius size is realized by two semi-circumference fixtures, the clamping radius of bar samples fixture can be adjusted according to the size of different bar samples, increase the test diameter range of bar samples.
Description
Technical field
The present invention relates to bar-shaped metal materials mechanics performance testing technology field, in particular to a kind of bar samples stretch folder
Hold device.
Background technique
Bar-shaped metal materials have very extensive application, bar-shaped metal materials in bridge construction, the industries such as communications and transportation
Need to do the testing experiment of the correlated performances such as stretching and fatigue before finished product use, traditional sample holding device directly will examination
Sample is clamped on test machine grip holder, and the diameter of bar samples must be matched with the collet diameter of testing machine, bar samples test
Range greatly reduces.In addition, traditional specimen holder need to be tapped in sample holder end surfaces, screw thread it is intensive be distributed in examination
Sample surface causes specimen surface damage larger, the decline of clamping end intensity, and sample usually occurs in clamping end disconnected during test
It splits, leads to the failure of test.
Summary of the invention
For the technical problems in the prior art, it stretches and clamps the purpose of the present invention is to provide a kind of bar samples
Device, to meet stretching and the testing fatigue of different metal bar samples, clamping device structure is simple, easy processing, use scope
Extensively, measurement result is accurate.
To reach realization above-mentioned purpose, the present invention adopts the following technical scheme:
The present invention provides a kind of bar samples to stretch clamping device, including the identical bar samples fixture of two structures,
Two bar samples fixtures are respectively used to the clamping end of clamping bar samples two；Two bar samples fixtures are fixedly mounted respectively
In testing machine upper fixture block and testing machine lower fixture block；Each bar samples fixture includes the first semi-circumference fixture and the second semi-circumference
Fixture, the first semi-circumference fixture and the second semi-circumference fixture are semicircular arc structure；First semi-circumference fixture and the second semicircle
The structure of all fixtures is identical, and is symmetricly set on bar samples clamping end circumference two sides；The inner arc surface of first semi-circumference fixture
Fixed setting, the inner arc surface and bar samples of the second semi-circumference fixture are bonded with the exterior arc surface of bar samples clamping end side
The exterior arc surface of the clamping end other side is bonded fixed setting.
Further, it is convex that several clampings are provided on the inner arc surface of the first semi-circumference fixture or the second semi-circumference fixture
Platform, each clamping boss are vertical with the axis of the first semi-circumference fixture or the second semi-circumference fixture；Several clamping boss are along the
The setting of the axis uniform intervals of half circumferential clamp or the second semi-circumference fixture, clamping boss on the first semi-circumference fixture and the
Clamping boss on two semi-circumference fixtures is symmetrical arranged；Bar samples and the first semi-circumference fixture or the second semi-circumference fixture connect
Corresponding clamp groove is provided in contacting surface, the clamp groove on bar samples and clamping boss are cooperatively connected.
Further, the height of each clamping boss is 0.4-0.6mm.
Further, the number for clamping boss is three；Three clamping boss be separately positioned on the first semi-circumference fixture or
On the top of second semi-circumference fixture, middle part and lower part inner arc surface.
Further, the corner for clamping boss is set as circular arc chamfering.
Further, screw thread is evenly arranged in testing machine upper fixture block and testing machine lower fixture block.
Further, non-slip mat is provided between bar samples fixture and testing machine upper fixture block or testing machine lower fixture block.
Further, slip resistant film is provided between bar samples fixture and bar samples.
Compared with the prior art, the beneficial effects of the present invention are as follows:
The present invention provides a kind of bar samples to stretch clamping device, realizes bar samples by two semi-circumference fixtures
Fixture clamps the adjusting of radius size, and the clamping radius of bar samples fixture can be adjusted according to the size of different bar samples
Section, the application range of clamping device is larger, considerably increases the test diameter range of bar samples.
Further, the clamping end surfaces of bar samples need to only correspond to clamping boss and open up limited groove, substantially reduce
In the prior art due to the screw thread in stick-shape sample surface dense distribution, damages, tested caused by stick-shape sample surface
The phenomenon that Cheng Zhong, clamping boss and groove are cooperatively connected, and avoid the fracture of bar samples clamping end, tension test success rate is high,
Experimental test result is accurate.
Further, it by the way that one layer of slip resistant film is arranged between bar samples and bar samples fixture, increases rodlike
Frictional force between sample and bar samples fixture avoids and bar samples clamping end is caused to produce since excessive chucking power is excessive
Raw mechanical damage, ensure that tension test process is gone on smoothly, improves the accuracy of experimental test result.
Further, by the way that non-slip mat is arranged between bar samples fixture and testing machine fixture block, bar samples are increased
Frictional force between fixture and testing machine fixture block avoids and bar samples clamping end is caused to generate since excessive chucking power is excessive
Mechanical damage ensure that tension test process is gone on smoothly, improve the accuracy of experimental test result.
Detailed description of the invention
Fig. 1 is the facade view that bar samples of the present invention stretch clamping device；
Fig. 2 is the semicircle shape fixture top view in bar samples of the present invention stretching clamping device；
Fig. 3 is the partial structural diagram that bar samples of the present invention stretch clamping device；
Fig. 4 is the use state diagram that bar samples of the present invention stretch clamping device；
Fig. 5 is the Ultra-fine Grained pure titanium TA1 room temperature load-deformation curve obtained in embodiment 1 using the clamping device；
Fig. 6 is the industrial pure titanium TA2 room temperature load-deformation curve obtained in embodiment 2 using the clamping device.
Wherein, 1 bar samples fixture, 2 clamping boss, 3 testing machine upper fixture blocks, 4 testing machine lower fixture blocks, 5 bar samples, 6
Non-slip mat, 7 slip resistant films, 8 screw threads；11 first semi-circumference fixtures, 12 second semi-circumference fixtures.
Specific embodiment
The technical solution of the embodiment of the present invention is explained and illustrated below with reference to the attached drawing of the embodiment of the present invention, but under
It states embodiment to be merely a preferred embodiment of the present invention, and not all.Based on the implementation example in the implementation mode, those skilled in the art
Obtained other embodiments without making creative work, belong to protection scope of the present invention.
With reference to shown in attached drawing 1-3, the present invention provides a kind of bar samples stretching clamping device, including two structures are identical
Bar samples fixture 1, two bar samples fixtures 1 are respectively used to bar samples 5 two clamping ends of clamping；Two rodlike examinations
Sample fixture 1 is respectively and fixedly installed in testing machine upper fixture block 3 and testing machine lower fixture block 4.
Each bar samples fixture 1 includes the first semi-circumference fixture 11 and the second semi-circumference fixture 12, the first semi-circumference folder
Tool 11 and the second semi-circumference fixture 12 are semicircular arc structure；The knot of first semi-circumference fixture 11 and the second semi-circumference fixture 12
Structure is identical, and is symmetricly set on 5 clamping end circumference two sides of bar samples, the inner arc surface of the first semi-circumference fixture 11 and rodlike examination
The exterior arc surface of 5 clamping end side of sample is bonded setting, and the inner arc surface of the second semi-circumference fixture 12 and 5 clamping end of bar samples are another
The exterior arc surface of side is bonded setting；If being provided on the inner arc surface of the first semi-circumference fixture 11 or the second semi-circumference fixture 12
Dry clamping boss 2, the axis of each clamping boss 2 and the first semi-circumference fixture 11 or the second semi-circumference fixture 12；Several
It clamps boss 2 to be arranged along the axis uniform intervals of the first semi-circumference fixture 11 or the second semi-circumference fixture 12, the first semi-circumference folder
Clamping boss 2 on tool 11 and the clamping boss 2 on the second semi-circumference fixture 12 are symmetrical arranged；Bar samples 5 and the first semicircle
Corresponding clamp groove, the clamp groove on bar samples 5 are provided on the contact surface of all fixtures 11 or the second semi-circumference fixture 12
It is cooperatively connected with clamping boss 2.
Preferably, the number of the first semi-circumference fixture 11 or the clamping boss 2 on the second semi-circumference fixture 12 is three,
Three clamping boss 2 are separately positioned on top, middle part and the lower part circle of the first semi-circumference fixture 11 or the second semi-circumference fixture 12
Zhou Shang.The height for clamping boss 2 is 0.4-0.6mm, and the depth of the clamp groove on bar samples 5 is 0.4-0.6mm.It clamps convex
The corner of platform 2 is set as circular arc chamfering, and the wedge angle on clamping boss 2 is avoided to cause to damage to bar samples.
It is provided with slip resistant film 7 between bar samples fixture 1 and bar samples 5, increases bar samples and bar samples
Frictional force between fixture avoids and bar samples clamping end is caused to generate mechanical damage since excessive chucking power is excessive, protects
It has demonstrate,proved tension test process to go on smoothly, has improved the accuracy of experimental test result.
It is evenly arranged with screw thread in testing machine upper fixture block 3 and testing machine lower fixture block 4, the clamping for increasing testing machine fixture block rubs
Power is wiped, non-slip mat 6 is provided between bar samples fixture 1 and testing machine upper fixture block 3 or testing machine lower fixture block 4, is increased rodlike
Frictional force between specimen holder and testing machine fixture block avoids and causes bar samples clamping end since excessive chucking power is excessive
Mechanical damage is generated, ensure that tension test process is gone on smoothly, improve the accuracy of experimental test result.
In use, wrapping up one layer of slip resistant film 7 in two clamping ends of bar samples 5 first；Then by 5 band of bar samples
There is the clamping end of slip resistant film 7 to be clamped in the centre of a bar samples fixture 1；Secondly, by one of bar samples fixture 1
It is clamped in testing machine upper fixture block 3, another bar samples fixture 1 is clamped in testing machine lower fixture block 4, bar samples fixture
Non-slip mat 6 is respectively provided between 1 and testing machine upper fixture block 3 and testing machine lower fixture block 4；Then rodlike examination is clamped using default pretightning force
Sample 5 after clamping, is tested according to default tension test parameter, until off-test, obtains test result.
A kind of bar samples of the present invention stretch clamping device, realize bar samples by two semi-circumference fixtures
Fixture clamps the adjusting of radius size, and the clamping radius of bar samples fixture can be adjusted according to the size of different bar samples
Section, the application range of clamping device is larger, considerably increases the test diameter range of bar samples.
A kind of bar samples of the present invention stretch in clamping device, and the clamping end surfaces of bar samples need to only correspond to folder
It holds boss and opens up limited groove, greatly reduce in the prior art due to the screw thread in stick-shape sample surface dense distribution, it is right
It is damaged caused by stick-shape sample surface, during test, clamping boss and groove are cooperatively connected, and avoid bar samples clamping end
The phenomenon that fracture, tension test success rate is high, and experimental test result is accurate.
A kind of bar samples of the present invention stretch in clamping device, by bar samples and bar samples fixture it
Between be arranged one layer of slip resistant film, increase the frictional force between bar samples and bar samples fixture, avoid due to excessive
Chucking power is excessive to cause bar samples clamping end to generate mechanical damage, ensure that tension test process is gone on smoothly, improves examination
The accuracy of test test result.
A kind of bar samples of the present invention stretch in clamping device, by bar samples fixture and testing machine fixture block
Between non-slip mat is set, increase the frictional force between bar samples fixture and testing machine fixture block, avoid due to excessive folder
Holding force is excessive to cause bar samples clamping end to generate mechanical damage, ensure that tension test process is gone on smoothly, improves test
The accuracy of test result.
Embodiment 1
With reference to shown in attached drawing 4, clamping device is stretched using bar samples of the present invention, Ultra-fine Grained pure titanium TA1 is carried out
Tension test.
Firstly, preparing Ultra-fine Grained pure titanium TA1 at room temperature by pure titanium TA1 after severe plastic deformation；
Then, Ultra-fine Grained pure titanium TA1 is turned into the bar samples that diameter is φ 5mm, while at two of bar samples
Clamping end uniformly opens up the groove of three 0.5mm depths respectively；The positions and dimensions phase of the positions and dimensions of groove and clamping boss
Cooperation；
Secondly, being roughly ground to bar samples, fine and closely woven and polishing, it is ensured that the smooth flawless in the surface of bar samples；
Secondly, wrapping up one layer of slip resistant film in the clamping end of bar samples, then two clamping ends of bar samples are distinguished
It is clamped on two bar samples fixtures；
Finally, being lined with non-slip mat, testing machine between bar samples fixture and testing machine upper fixture block and testing machine lower fixture block
After upper fixture block and testing machine lower fixture block clamp in advance, tensile speed is set as 1 × 10-3s-1, testing machine is opened at room temperature to carry out
Extension test is shut down after bar samples are broken.
Ultra-fine Grained pure titanium TA1 room temperature load-deformation curve is drawn according to test data, as shown in figure 5, it is pure to measure Ultra-fine Grained
The tensile strength of titanium TA1 is 1002.2MPa, and test result is accurate.
Embodiment 2
With reference to shown in attached drawing 4, using bar samples of the present invention stretch clamping device to rodlike industrial pure titanium TA2 into
Row tension test.
Firstly, raw material to be turned into the bar samples of φ 6mm, while uniform in two clamping ends of bar samples difference
Open up the groove of three 0.5mm depths；The positions and dimensions of groove are matched with the positions and dimensions of clamping boss；
Then, to 400#, 600#, 800#, 1000#, 1500# is successively used, 2000# sand paper is ground, and then uses suede
Cloth is polished, until the smooth flawless of specimen surface, polishing terminate, it is ensured that the smooth flawless in the surface of bar samples；
Secondly, at room temperature, one layer of slip resistant film is wrapped up into industrial pure titanium TA2 bar samples clamping end, then by stick
Two clamping ends of shape sample are clamped in respectively on two bar samples fixtures；
Finally, being lined with non-slip mat, testing machine between bar samples fixture and testing machine upper fixture block and testing machine lower fixture block
After upper fixture block and testing machine lower fixture block clamp in advance, tensile speed is set as 1 × 10-2s-1, testing machine is opened at room temperature to carry out
Extension test is shut down after bar samples are broken.
Industrial pure titanium TA2 room temperature load-deformation curve is drawn according to test data, as shown in fig. 6, measuring industrially pure titanium
The room temperature tensile intensity of TA2 is 403MPa, and test result is accurate.
It is enlightenment with above-mentioned embodiment according to the present invention, through the above description, those skilled in the art are complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention'.This invention it is technical
Range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (8)
1. a kind of bar samples stretch clamping device, which is characterized in that including the identical bar samples fixture (1) of two structures,
Two bar samples fixtures (1) are respectively used to the clamping end of clamping bar samples (5) two；Two bar samples fixtures (1) point
It is not fixedly mounted in testing machine upper fixture block (3) and testing machine lower fixture block (4)；Each bar samples fixture (1) includes the first half
Circumferential clamp (11) and the second semi-circumference fixture (12), the first semi-circumference fixture (11) and the second semi-circumference fixture (12) are half
Arc-shaped structure；First semi-circumference fixture (11) is identical with the structure of the second semi-circumference fixture (12), and is symmetricly set on rodlike
Sample (5) clamping end circumference two sides；The inner arc surface of first semi-circumference fixture (11) is outer with bar samples (5) clamping end side
Arc surface fitting fixed setting, the inner arc surface of the second semi-circumference fixture (12) and bar samples (5) clamping end other side it is outer
Arc surface fitting fixed setting.
2. a kind of bar samples according to claim 1 stretch clamping device, which is characterized in that the first semi-circumference fixture
(11) or on the inner arc surface of the second semi-circumference fixture (12) be provided with several clamping boss (2), each clamping boss (2) and
The axis of first semi-circumference fixture (11) or the second semi-circumference fixture (12) is vertical；Several clampings boss (2) are along the first semicircle
The axis uniform intervals of all fixtures (11) or the second semi-circumference fixture (12) are arranged, and the clamping on the first semi-circumference fixture (11) is convex
Clamping boss (2) on platform (2) and the second semi-circumference fixture (12) is symmetrical arranged；Bar samples (5) and the first semi-circumference fixture
(11) or on the contact surface of the second semi-circumference fixture (12) corresponding clamp groove, the clamp groove on bar samples (5) are provided with
It is cooperatively connected with clamping boss (2).
3. a kind of bar samples according to claim 2 stretch clamping device, which is characterized in that each clamping boss (2)
Height be 0.4-0.6mm.
4. a kind of bar samples according to claim 2 stretch clamping device, which is characterized in that of clamping boss (2)
Number is three；Three clamping boss (2) are separately positioned on the upper of the first semi-circumference fixture (11) or the second semi-circumference fixture (12)
On portion, middle part and lower part inner arc surface.
5. a kind of bar samples according to claim 2 stretch clamping device, which is characterized in that the angle of clamping boss (2)
Portion is set as circular arc chamfering.
6. a kind of bar samples according to claim 1 stretch clamping device, which is characterized in that testing machine upper fixture block (3)
Screw thread is evenly arranged with on testing machine lower fixture block (4).
7. a kind of bar samples according to claim 1 stretch clamping device, which is characterized in that bar samples fixture (1)
Non-slip mat (6) are provided between testing machine upper fixture block (3) or testing machine lower fixture block (4).
8. a kind of bar samples according to claim 1 stretch clamping device, which is characterized in that bar samples fixture (1)
Slip resistant film (7) are provided between bar samples (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910572380.9A CN110186753A (en) | 2019-06-28 | 2019-06-28 | A kind of bar samples stretching clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910572380.9A CN110186753A (en) | 2019-06-28 | 2019-06-28 | A kind of bar samples stretching clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110186753A true CN110186753A (en) | 2019-08-30 |
Family
ID=67724057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910572380.9A Pending CN110186753A (en) | 2019-06-28 | 2019-06-28 | A kind of bar samples stretching clamping device |
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| CN (1) | CN110186753A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111015277A (en) * | 2019-12-12 | 2020-04-17 | 西安诺博尔稀贵金属材料股份有限公司 | Clamp for processing silver-based alloy bar and processing method |
| CN113252472A (en) * | 2021-06-25 | 2021-08-13 | 中国科学院地质与地球物理研究所 | Anchor clamps and shear test device |
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| CN109813610A (en) * | 2019-02-19 | 2019-05-28 | 南京航空航天大学 | A kind of ceramic matric composite superhigh temperature stretching combinations fixture |
| CN210571710U (en) * | 2019-06-28 | 2020-05-19 | 西安建筑科技大学 | Tensile clamping device of bar sample |
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2019
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| CN102323143A (en) * | 2011-05-18 | 2012-01-18 | 西安近代化学研究所 | Fixture for tensile bonding strength test of solid propellant and coating |
| KR20140041268A (en) * | 2012-09-27 | 2014-04-04 | 현대제철 주식회사 | Jig for griping sample and tension testing apparatus having the same |
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| CN111015277A (en) * | 2019-12-12 | 2020-04-17 | 西安诺博尔稀贵金属材料股份有限公司 | Clamp for processing silver-based alloy bar and processing method |
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