CN105751104B - The fatigue tester clamping device of improved synchrotron radiation light source in situ imaging - Google Patents
The fatigue tester clamping device of improved synchrotron radiation light source in situ imaging Download PDFInfo
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- CN105751104B CN105751104B CN201610238936.7A CN201610238936A CN105751104B CN 105751104 B CN105751104 B CN 105751104B CN 201610238936 A CN201610238936 A CN 201610238936A CN 105751104 B CN105751104 B CN 105751104B
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- light source
- synchrotron radiation
- radiation light
- clamping device
- upper fixture
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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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)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of fatigue tester clamping device of improved synchrotron radiation light source in situ imaging, it is arranged on the base of platform drum of synchrotron radiation light source.The clamping device includes sample holder unit and the additional adjustment unit of plastic deformation.Sample holder unit is vertically arranged along tester base axis, is divided into two parts of lower chuck section and upper grip section.Upper grip section is provided with the additional adjustment unit of plastic deformation.The present invention compares previous generation fatigue testers and has done further improvement, increases the buffer shock-absorbing of system and the performance of noise reduction；Fully ensuring that load can be applied on sample, and the integrated carrying of guarantee test machine；The additional adjustment unit of plastic deformation can adjust the size of the power of its loading after sample is plastically deformed, and more detailed consideration has been done on the detailed problem in experiment implementation process compared to previous generation testing machines.
Description
Technical field
The present invention relates to a kind of sample clamping mechanism for the fatigue tester that in situ imaging is carried out with synchrotron radiation light source with
And install and experimental method.
Background technology
For a long time, people have carried out substantial amounts of research with regard to the problem of fatigue damage of engineering structure.It is generally believed that the tired longevity
Life is mainly consumed in crack initiation and Short crack propagation stage.The propagation behavior of short crack is macroscopically with crack length increase
Change, it is microcosmic on also influenceed by factors such as microstructure of metals and environment, along with crack closure and crackle
The problems such as effect so that the scaling problem of the short crack during military service under cyclic loading becomes sufficiently complex.Preferably to visit
Study carefully crackle in expansion process with microstructure change and macro-mechanical property relation, and then for engineering parts life-span
Design provides relatively reliable theoretical foundation, it is necessary to be tested by fatigue tester parts, obtains material and carries outside
The quantitative mechanics parameter of macroscopic view under lotus effect.In situ fatigue test is by the way that electron microscope technique is tested with traditional fatigue of materials
Technology is effectively combined, and during Mechanical loading and testing fatigue are carried out to material sample, shutdown stage by stage is led to during shutdown
Micro imaging system integrated on experiment porch is crossed, to materials microstructure change, microdeformation damage, in situ imaging note is carried out
Record；The fatigue mechanics test data and the record by imaging in multiple stages of macroscopic view are combined, and can be reflected the mechanical property of material and be shown
Micro-assembly robot development law, new method is provided for the mechanical characteristic and Microstructure Evolvement of analysis solid-state material.
In existing in situ fatigue test device, micro imaging system is generally light microscope, due to its resolution ratio with
And enlargement ratio is relatively low, test effect has significant limitation.In recent years, occur in that using SEM (SEM)
Fatigue tester.Such as：The original position stretching tester of the Kammrath＆Weiss companies exploitation of Germany utilizes servo servomotor
Driving, coordinates SEM use, and testing fatigue in situ can be carried out to metal material.SEM resolution ratio reaches micron order, can be preferably
It was observed that the microstructure morphology and defect of material.But, SEM can only obtain the two dimensional image on the surface of material, and can not obtain
To the three-dimensional image of the inside of material；And its light-source brightness is low, optical signal detecting signal to noise ratio is low so that measurement accuracy and inspection
Sensitivity is surveyed to have much room for improvement.
Large traction Dynamic Test Chamber teacher Wu Shengchuan is handed over to take the lead to take the lead in have developed domestic First available for same by southwest
The in-situ observation fatigue tester of radiant image is walked, and has tentatively been come into operation.Its main frame such as Chinese patent
Described in CN105334237A.But fatigue tester is found in use during fatigue test, because the vibration of generation is acute
It is strong, and clamping of the fixture to sample usually can cause to release because of violent vibration in process of the test.In addition, sending out sample
Without further regulating measure after raw plastic deformation, so that experiment can not smoothly go on, based on the actual conditions, very
It is necessary that the clamping device of fixture is further improved.
The content of the invention
In view of prior art is not enough above, the purpose of the present invention is to can be used for synchrotron radiation light source to carry out after improving
The fatigue tester sample clamping mechanism of in situ imaging, makes it overcome the deficiencies in the prior art.
The purpose of the present invention is realized by following means：A kind of improved synchrotron radiation light source in situ imaging it is tired
Labor test machine clamping mechanism, is arranged on the base of platform drum of synchrotron radiation light source, and the clamping device includes
Sample holder unit and the additional adjustment unit of plastic deformation；
Sample holder unit is vertically arranged along tester base axis, is divided into two portions of lower chuck section and upper grip section
Point：In lower chuck section, cover plate is fixed on the top of base；The top of follower lever is stretched out cover plate and coupled with lower clamp, follower lever and
Disc spring is provided between lower clamp；Upper grip section is supported by columnar shroud, and upper fixture is suspended on lower clamp (), by
Under up pass sequentially through flange frock connecting sensor and screw press one；Screw press one and the regulation thread connection of disk one,
Adjust the middle part perforate of disk one and couple with the threaded upper ends of load transducer, lower end and the flange frock spiral shell of load transducer
Line couples.
Compared with prior art, the beneficial effects of the invention are as follows：Process of the fatigue tester of the present invention in fatigue test
In, synchrotron radiation light source direct in-situ can be used to be directed at fatigue testing specimen and synchronize radiant image, and then obtain the interior of material
The three-dimensional image in portion；The mechanical property of material and the development law of microscopic structure can be reflected well.Synchrotron radiation light
Brightness is high, and its signal noise ratio (snr) of image is high, and imaging precision is high with sensitivity, can apparent, reflection material exactly mechanical property and
The development law of microscopic structure.So as to the present invention can be provided for the Fatigue life design of engineering parts relatively reliable experiment according to
According to.
Further improvement is done for previous generation fatigue testers, the performance indications to various aspects propose higher want
Ask：
1, disc spring (lower section for being located at lower clamp the latter half) is added on transmission mechanism, increase the buffer shock-absorbing of system with
And the performance of noise reduction；
2, the folding of previous generation dual cloche is eliminated, shroud is made of one, and increases screw plexiglass tent
Top and bottom, fully ensure that load can be applied on sample, and the integrated carrying of guarantee test machine；
4, the change of entirety has been carried out to the structure of upper lower clamp, original globality fixture has been respectively classified into up and down two
Part, easily facilitates installation compared to original fixture, clamps sample also more firm；
5, install the additional adjustment unit of plastic deformation additional in testing machine header field, played regulation upper fixture and clamp and try
Sample adjusts the effect of the size of the power of its loading after being plastically deformed, compared to previous generation testing machines in experiment implementation process
More detailed consideration has been done on detailed problem.
Brief description of the drawings
Overall structure diagram when Fig. 1 is installed in the fatigue tester of synchrotron radiation light source progress in situ imaging.
Fig. 2 is overall structure diagram of the present invention.
Fig. 3 is Fig. 2A partial sectional view.
Fig. 4 is Fig. 2 B partial sectional view.
Fig. 5 is Fig. 2 C partial sectional view.
In figure：1 is bottom plate, and 1a is bottom cross, and 2 be synchrotron radiation light source platform, and 3 be base, and 4 be push rod, and 5 be to watch
Motor is taken, 6 be cam, and 7 be rolling bearing, and 8 be connecting rod, and 9 be spring, and 10 be follower lever, and 11 be linear bearing, and 12 be cover plate,
14 be shroud, and 15 be top cover, and 16 be screw press one, and 17 be regulation disk one, and 18 be load transducer, and 19 be linear bearing
Two, 20 be flange frock, and 22 be screw press two for regulation disk two, 23, and 25 be optical transmitting set, and 26 be optical receiver, and 27 are
Rolling bearing axis, 28 be disc spring, and 29 be jump ring, and 30 be connecting column, and 31 be sample.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Embodiment
Fig. 1, Fig. 2 show that synchrotron radiation light source carries out the fatigue tester of in situ imaging, and its composition is：The bottom of bottom plate 1
Cross 1a is entrenched on the platform 2 of synchrotron radiation light source, the base 3 for being fixedly arranged in the middle of drum of the upper surface of bottom plate 1；Push away
Bar 4 is arranged in the left wall and right wall of base 3 by the linear bearing 1 of level；It is provided with and watches on the left of the upper surface of bottom plate 1
Take installation cam 6 on motor 5, the axle of servomotor 5；The left end perforate of push rod 4 is simultaneously equipped with rolling bearing axis 27, the dress rolling of bearing axle 27
Dynamic bearing 7 is simultaneously contacted with the margo dexter of cam 6, and the middle part of push rod 4 and the lower end of connecting rod 8 are hinged, and the right-hand member of push rod 4 passes through spring 9
In the right wall for being connected on base 3.
The fatigue tester clamping device of the improved synchrotron radiation light source in situ imaging of the present invention is arranged on synchrotron radiation light
On the base 3 of the platform drum in source.Clamping device includes sample holder unit and the additional adjustment unit of plastic deformation.
Sample holder unit is vertically arranged along tester base axis, is divided into two portions of lower chuck section and upper grip section
Point：In lower chuck section, cover plate 12 is fixed on the top of base 3；The top of follower lever 10 is stretched out cover plate 12 and coupled with lower clamp, from
Disc spring 28 is provided between lever 10 and lower clamp；Upper grip section is supported by columnar shroud 14, and upper fixture is suspended at lower folder
On tool, the connecting sensor 18 of flange frock 20 and screw press 1 are passed sequentially through from lower to upper；Screw press 1 is with adjusting
The thread connection of pitch circle disk 1, adjusts the middle part perforate of disk 1 and couples with the threaded upper ends of load transducer, load is passed
The lower end of sensor 18 and the thread connection of flange frock 20.
Upper grip section is provided with the additional adjustment unit of plastic deformation, and the plastic deformation adds adjustment unit and justified including regulation
Disk 2 22 and two additional screw press 1；Regulation disk 2 22 is nested with by through hole thereon is standing on the connection in upper fixture
Connect on post 30, and can be slided up and down along connecting column 30.The end of screw press 1 is withstood on regulation disk 2 22.
So, the top of follower lever 10 is stretched out cover plate 12 and coupled with lower clamp, and the upper surface of cover plate 12 is simultaneously chimeric one
Columnar shroud 14 is simultaneously fixed with the thread connection of cover plate 12, top chimeric with the top cover 15 simultaneously thread connection, shroud of shroud 14
14 general difference transparent materials are made, and shroud 14 uses lucite in the present embodiment.The bottom surface perforate of top cover 15, by adjusting
Press screw rod 1 with regulation the thread connection of disk 1, adjust disk 1 middle part perforate and with the upper end of load transducer 18
Thread connection, lower end and the thread connection of flange frock 20, the spiral shell that flange frock 20 passes through connecting column two ends of load transducer 18
Line couples with part 21b under upper fixture；Part 21a and the regulation thread connection of disk 2 22 in upper fixture, regulation disk 2 22 lead to
Cross screw press two to be connected with top cover 15, upper fixture 21a, 21b is located at the surface of lower clamp；Servomotor 5, load sensing
Device 18 is electrically connected with data processing with control device.
The clamping device that part is sample is improved to former fatigue tester, its composition is：Disc spring 28 is arranged on driven
The upper end of bar 10, is in compression travel, the connection of the upper end of disc spring 28 lower clamp the latter half 13b, lower clamp the latter half 13b
Coupled by screw with lower clamp top half 13a, the lower end of sample is clamped between two parts；The upper end of sample is clipped in upper fixture
Between top half 21a and upper fixture the latter half 21b, upper fixture the latter half 21b passes through the screwed connecting column in two ends
30 are connected with flange frock 20, become one, four apertures are provided with upper fixture top half 21a so that connecting column
30 can right through and it is contactless；Upper fixture top half 21a is then mutually fixed by thread connection with regulation disk 2 22, is adjusted
2 22, disk is connected by screw press two with top cover 15, and relevant position on aperture, screw press two is provided with top cover 15 and is opened
There is jump-ring slot, and be put into jump ring 29, be stuck on top cover 15；Load transducer upper end connection simultaneously has regulation disk 1, regulation
One 17, disk is by screw press 1 to be fixed in the form of jump ring 17 on top cover 15.
When specifically used, using the steps：
A, test specimen installation
Shroud 14 is removed, sample is placed in directly over lower clamp, and lower clamp is clamped by sample by screw, then will be enclosed
Cover 14 is installed on base 3 by thread connection, then sample upper end is loaded under the upper fixture assembled in advance part 21a with
In lower part 21b space, and shroud 14 and the thread connection of top cover 15 is good, sample is covered on to the sky surrounded by shroud 14 completely
In, while turning screw press 1 and screw press 2 23 so that upper fixture clamps sample completely, while on control circle
It can be seen that the force signal vanishing that load transducer is adopted, can be ready for experiment on face；
B, in situ fatigue test
Data processing is rotated with control device controlled motor 5 with the frequency of setting, and band moving cam 6 is rotated, and then by pushing away
Bar 4, connecting rod 8, follower lever 10 drive lower clamp to move back and forth up and down, and apply vertical reciprocal displacement load to sample；Meanwhile, carry
Lotus sensor 18 detects the load signal that sample is born, and passes to data processing and control device；
After reciprocal vertical displacement load reaches the imaging cycle number of times of setting, data processing and control device controlled motor
5 stop operating, and restart synchrotron radiation light source, and the platform 2 of synchrotron radiation light source rotates, and drive the sample on bottom plate 1 and bottom plate
Carry out 360 degree of rotations；Meanwhile, the synchrotron radiation light that the optical transmitting set 25 of synchrotron radiation light source is sent penetrates shroud 14, then penetrates
Received after the sample of 360 degree of rotations by the optical receiver 26 of synchrotron radiation light source, complete 360 degree of imagings to sample；Repeat with
Upper operation, until reaching the cycle-index of the completion experiment of setting.
Claims (3)
1. a kind of fatigue tester clamping device of improved synchrotron radiation light source in situ imaging, is arranged on synchrotron radiation light source
On the base (3) of platform drum, it is characterised in that the clamping device includes sample holder unit and plastic deformation is chased after
Plus adjustment unit；
Sample holder unit is vertically arranged along tester base axis, is divided into two parts of lower chuck section and upper grip section：
Lower chuck section, cover plate (12) is fixed on the top of base (3)；The top of follower lever (10) is stretched out cover plate (12) and joined with lower clamp
Connect, follower lever (10) is provided with disc spring (28) between lower clamp；Upper grip section is supported by columnar shroud (14), upper fixture
It is suspended on lower clamp, flange frock (20) connecting sensor (18) and screw press one (16) is passed sequentially through from lower to upper；
Screw press one (16) and regulation disk one (17) thread connection, the middle part perforate of regulation disk one (17) and and load transducer
(18) threaded upper ends connection, lower end and flange frock (20) thread connection of load transducer (18)；
Upper grip section is provided with the additional adjustment unit of plastic deformation, and the plastic deformation, which adds adjustment unit, includes regulation disk two
And two additional screw press one (16) (22)；Regulation disk two (22) is nested with by through hole thereon to be stood in upper fixture
On connecting column (30), and it can be slided up and down along connecting column (30)；The end of screw press one (16) withstands on regulation disk two (22)
On.
2. the fatigue tester clamping device of improved synchrotron radiation light source in situ imaging according to claim 1, it is special
Levy and be, a part or whole part of the shroud (14) is made using transparent material.
3. the fatigue tester clamping device of improved synchrotron radiation light source in situ imaging according to claim 1, it is special
Levy and be, the upper fixture has two parts, i.e., in upper fixture under part (21a) and upper fixture partly (21b), in upper fixture
Partly (21a) by through hole thereon be nested with upper fixture on part (21b) connecting column (30) for connecting firmly, upper fixture top
(21a) is divided can up and down to be slid along along connecting column (30)；Lower clamp also uses same structure, with part (13a) on lower clamp
With part (13b) under lower clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610238936.7A CN105751104B (en) | 2016-04-18 | 2016-04-18 | The fatigue tester clamping device of improved synchrotron radiation light source in situ imaging |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610238936.7A CN105751104B (en) | 2016-04-18 | 2016-04-18 | The fatigue tester clamping device of improved synchrotron radiation light source in situ imaging |
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| Publication Number | Publication Date |
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| CN105751104A CN105751104A (en) | 2016-07-13 |
| CN105751104B true CN105751104B (en) | 2017-09-08 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018140B (en) * | 2016-06-21 | 2018-10-30 | 西南交通大学 | The fatigue tester actuation mechanism of improved synchrotron radiation light source in situ imaging |
| CN107036888B (en) * | 2017-03-03 | 2019-08-20 | 西南交通大学 | Simulate multi-environment synchrotron radiation in situ imaging cupping machine and its test method |
| CN108693198B (en) * | 2018-03-08 | 2024-05-14 | 西南交通大学 | Clamping mechanism and synchrotron radiation in-situ imaging fatigue testing machine |
| CN108562506A (en) * | 2018-03-08 | 2018-09-21 | 西南交通大学 | High frequency in situ imaging fatigue tester |
| CN108444849A (en) * | 2018-03-08 | 2018-08-24 | 西南交通大学 | Synchrotron radiation vacuum/high pressure width-adjustable in situ fatigue test machine and its component |
| CN109883847B (en) * | 2019-03-20 | 2023-09-26 | 西南交通大学 | X-ray imaging-based high-load high-frequency in-situ stretching and fatigue testing machine |
| CN110567799A (en) * | 2019-09-12 | 2019-12-13 | 中汽研（天津）汽车工程研究院有限公司 | Damping device of material dynamic mechanics test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3917947A (en) * | 1973-01-26 | 1975-11-04 | Borden Inc | Foreign particle detector |
| CN201984042U (en) * | 2011-02-24 | 2011-09-21 | 上海理工大学 | Rotation-type part surface quality detecting system |
| CN202330294U (en) * | 2011-11-08 | 2012-07-11 | 中国科学院深圳先进技术研究院 | Surface defect detection device based on machine vision |
| CN203203938U (en) * | 2013-04-27 | 2013-09-18 | 贺少敏 | Device for visual inspection of surface defect of organic photoconductor |
| CN204255763U (en) * | 2014-11-11 | 2015-04-08 | 金发科技股份有限公司 | Based on the high speed strain proving installation of line-scan digital camera |
| CN105334237B (en) * | 2015-11-10 | 2018-05-18 | 西南交通大学 | The fatigue tester and test method of in situ imaging can be carried out with synchrotron radiation light source |
| CN205614527U (en) * | 2016-04-18 | 2016-10-05 | 西南交通大学 | Fatigue testing machine fixture of modified synchrotron radiation light source normal position formation of image |
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