CN108931440A - A kind of small sample is uniaxially stretched creep test fixture - Google Patents
A kind of small sample is uniaxially stretched creep test fixture Download PDFInfo
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- CN108931440A CN108931440A CN201710389031.4A CN201710389031A CN108931440A CN 108931440 A CN108931440 A CN 108931440A CN 201710389031 A CN201710389031 A CN 201710389031A CN 108931440 A CN108931440 A CN 108931440A
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- fixture
- extending
- hole
- fixture block
- bar
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
-
- 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
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0482—Chucks, fixtures, jaws, holders or anvils comprising sensing means
Abstract
The invention belongs to stretch and the field of test technology of Creep Mechanics performance, and in particular to a kind of small sample is uniaxially stretched creep test fixture.Fixture of the invention, including：Upper bracket, upper fixture, general fixture block, fixture block pin, lower bracket, lower fixture, bar of extending outside, lower pull rod, interior bar of extending, saddle, measurement foot, nut, displacement measuring device and frame of extending.Present invention mainly solves existing miniaturized test fixtures, the problem of generally existing sample draw stage slides in sample clamping, the present invention is positioned using bolt, and band is set in contact surface, it avoids sample caused inclination during clamping to distort and slide, while ensure that sample during stretching and will not influence the concentricity of measurement；Thermocouple is inserted into test sample fixture, it being capable of directly and accurately test sample actual experimental temperature；Linear variable difference transformer (LVDT) is connected using quartz pushrod, the high-temperature sample Mechanics Performance Testing being applicable under 1200 DEG C of environment of highest.
Description
Technical field
The invention belongs to stretch and the field of test technology of Creep Mechanics performance, and in particular to a kind of small sample is uniaxially stretched
Creep test fixture.
Background technique
Miniaturized test technology is the saving test material of high degree under the premise of meeting dependence test requirement, and
Suitable dimensions require stringent experimental situation, such as are tested in limited lab space using small sample in irradiation experiment,
Then can greatly using irradiation space, while to treasure, film equivalent small sample also very be applicable in.Countries in the world also exist simultaneously
The testing standard of small sample is established in positive development, and various types of miniaturized test equipment also gradually start to grow up, but
Most of miniaturized test equipment clamps when sample clamps the sliding of generally existing sample draw stage, cannot be directly accurate
The problem of measurement specimen locations temperature, sensor can not meet stretching travel and creep precision simultaneously, it is therefore desirable to provide one
Kind can overcome the problems, such as the fixture of the above sample test.
Summary of the invention
The technical problem to be solved in the invention is：Existing miniaturized test fixture is generally deposited in sample clamping
The problem of sample draw stage slides.
It is described that technical scheme is as follows：
A kind of small sample is uniaxially stretched creep test fixture, including：Upper bracket, upper fixture, general fixture block, fixture block pin,
Lower bracket, lower fixture, bar of extending outside, lower pull rod, interior bar of extending, saddle, measurement foot, nut, displacement measuring device and frame of extending；
Wherein, the upper fixture is rectangular shape, and lower end is provided with fixture block pin used for positioning；One general fixture block passes through
Screw is fixedly installed on the lower end of upper fixture, and fixture block pin hole, the setting position of fixture block pin hole and setting are provided on general fixture block
Match in the spatial position of the fixture block pin of upper fixture lower end, fixture block pin hole and the cooperation of fixture block pin position general fixture block in upper fixture
The installation site of lower end；General fixture block is fixedly installed in the lower end of upper fixture by screw；Under the general fixture block and upper fixture
On two faces being in contact at end, several bands are also provided with, for increasing the chucking power to sample；
The lower fixture is rectangular shape, and the upper end is also equipped with fixture block pin used for positioning；In the upper end of lower fixture
It is fixedly installed another general fixture block by screw, fixture block pin hole, the setting position of fixture block pin hole are provided on general fixture block
Match with the spatial position for the fixture block pin for being set to lower fixture upper end, fixture block pin hole and the cooperation of fixture block pin position general fixture block and exist
The installation site of upper fixture lower end；On two faces being in contact of the general fixture block and lower fixture upper end, if being also provided with
Dry band, for increasing the chucking power to sample；
The upper bracket and lower bracket are streaky shape, upper fixture by screw be fixedly installed in the upper bracket it
On, lower fixture is fixedly installed on the lower bracket by screw；
It is described outer to extend bar and interior bar of extending respectively has a pair；The upper end of two bars of extending outside is fixedly installed in upper bracket respectively
Both ends, bars of extending outside two are arranged along the vertical direction, and bars of extending outside two are parallel；Extend in two bar upper end difference
The both ends of lower bracket are fixedly installed in, bar of extending in two is arranged along the vertical direction, and bar of extending in two is parallel, in two
Bar of extending is located at outside two between bar of extending；
The lower pull rod is cylindric bar, and lower fixture is fixedly installed in the top of lower pull rod by bolt；In lower pull rod
At the position of middle and lower part, it is further fixed on saddle；Large through-hole is provided in the middle part of saddle, lower pull rod is passed through from large through-hole；Saddle
Two sides are also each there are two small through hole, and bar of extending outside two is pierced by from two small through hole relatively in the outer part of position respectively, and two
Bar of inside extending is pierced by from two small through hole relatively in the inner part of position respectively；Wherein two bars of extending outside are opposite with saddle position
Fixed, bar of extending in two can slidably reciprocate in the small through hole that it is passed through along axial direction；
The lower position for setting up and being placed in lower pull rod of extending；Frame of extending is streaky shape, at the middle part for extending frame
It is provided with large through-hole, lower pull rod is pierced by from the large through-hole for frame of extending, and can be in the large through-hole for frame of extending along itself axis
To slidably reciprocating；It is extending on frame, at the position of large through-hole two sides, is also being each provided with a small through hole, extends in two
The lower end of bar is inserted into this two small through hole extended on frame respectively and is fixed；At the both ends for extending frame, also it is respectively arranged with logical
Hole, displacement measuring device are fixedly mounted in the through-hole at the frame both ends that are to extend；
Institute's displacement measurement device has shell and probe, and shell is fixedly mounted in the through-hole at the frame both ends that are to extend；
There are two the measurement feet, and measurement foot is laminated structure, is respectively arranged at lower pull rod two sides；The one of two measurement feet
End is respectively fixedly connected with to bar lower ends of extending outside two, is provided with through-hole, displacement measurement dress on the other end of two measurement feet
The probe set is pierced by upwards from the through-hole of measurement foot, and is connected by nut check；The nut is annular knurl thin nut, is had big
Outer diameter, the displacement that probe can be prevented downward.
Preferably, furniture of the invention further includes thermocouple probe, is additionally provided with hole in the side of upper fixture, installs in hole
There is thermocouple probe, when being clamped with sample, thermocouple probe is directly in contact with sample, can guarantee the same of fixture intensity
When, maximum possible measures the true temperature of sample.
Preferably, there are three the fixture block pins for being set to upper fixture lower end, arranges in space in up-side down triangle, and institute
It is located on vertical direction in the high line of up-side down triangle.
Preferably, it in upper fixture, is additionally provided with and wears pin, be used for entire chucking appliance system and test equipment tensioning system phase
Even, tensile creep test is carried out.
Preferably, there are three the fixture block pins for being set to lower fixture upper end, in space arrangement triangular in shape, and be in triangle
The high line of shape is located on vertical direction.
Preferably, it is described it is outer extend bar and interior bar of extending is made of quartz material, to guarantee the rigidity under high temperature.
Preferably, extend outside described two upper end of bars passes through two resistance to thermal screws respectively and is fixedly installed in the two of upper bracket
End.
Preferably, extend in described two upper end of bar passes through two resistance to thermal screws respectively and is fixedly installed in the two of lower bracket
End.
Preferably, fixture of the invention further includes opening sleeve, two opening sleeves be respectively arranged in frame both ends of extending this two
In a through-hole；Displacement measuring device is clamped in each opening sleeve；In the side at the every end of frame of extending, it is mounted on adjusting spiral shell
Bolt, rotation, which adjusts bolt, can adjust opening sleeve to the chucking power of displacement measuring device.
Preferably, institute's displacement measurement device is linear variable difference transformer.
Beneficial effects of the present invention are：
(1) present invention is positioned using bolt, is locked sample using upper and lower four bolts, and band is arranged in contact surface, is kept away
Sample caused inclination during clamping is exempted to distort and slide, while ensure that sample will not influence sample during stretching
The concentricity of product measurement；
(2) thermocouple is inserted into test sample fixture, it being capable of directly and accurately test sample actual experimental temperature；
(3) it using quartz pushrod connection linear variable difference transformer (LVDT), is applicable under 1200 DEG C of environment of highest
High-temperature sample Mechanics Performance Testing.
Detailed description of the invention
Fig. 1 is fixture entirety composition schematic diagram of the invention；
Fig. 2 is fixture top enlarged diagram of the invention；
Fig. 3 is the side view of present clip；
Wherein, 1- upper bracket, 2- wear pin, 3- upper fixture, the resistance to thermal screw of 4-, 5- sample, the general fixture block of 6-, 7- fixture block pin,
8- lower bracket, fixture under 9-, 10- bolt, bar of extending outside 11-, pull rod under 12-, bar of extending in 13-, 14- saddle, 15- measurement
Foot, 16- nut, 17- displacement measuring device, 18- opening sleeve, 19- extend frame, and 20- adjusts bolt, 21- thermocouple probe.
Specific embodiment
Creep test is uniaxially stretched to small sample of the invention with reference to the accompanying drawings and examples to be carried out specifically with fixture
It is bright.
As illustrated in fig. 1 and 2, fixture of the invention includes upper fixture 3 and lower fixture 9.Upper fixture 3 is rectangular shape,
Lower end is provided with fixture block pin 7 used for positioning, and there are three the fixture block pins 7 that 3 lower end of upper fixture is arranged in, and is in space in inverted triangle
Shape arrangement, and the high line of be in up-side down triangle is located on vertical direction.It is additionally provided with general fixture block 6 in the lower end of upper fixture 3, it should
Fixture block pin hole, the sky of the setting position of fixture block pin hole and the fixture block pin 7 for being set to 3 lower end of upper fixture are provided on general fixture block 6
Between position match, fixture block pin hole and the cooperation of fixture block pin 7 position general fixture block 6 in the installation site of 3 lower end of upper fixture.This is general
Fixture block 6 is fixedly installed in the lower end of upper fixture 3 by screw.It is in contact at two of 3 lower end of general fixture block 6 and upper fixture
On face, several bands are also provided with, for increasing the chucking power to sample 5.
In upper fixture 3, it is additionally provided with and wears pin 2, for entire chucking appliance system to be connected with test equipment tensioning system, into
Row tensile creep test.
Lower fixture 9 is rectangular shape, and the upper end is provided with fixture block pin 7 used for positioning, lower 9 upper end of fixture is arranged in
There are three fixture block pins 7, in space arrangement triangular in shape, and high line triangular in shape is located on vertical direction.In lower fixture 9
Upper end be provided with another general fixture block 6, be provided with fixture block pin hole on the general fixture block 6, the setting position of fixture block pin hole with
The spatial position for being set to the fixture block pin 7 of lower 9 upper end of fixture matches, and fixture block pin hole and the cooperation of fixture block pin 7 position general fixture block 6
Installation site in 3 lower end of upper fixture.The general fixture block 6 is fixedly installed in the lower end of upper fixture 3 by screw.In the universal clamp
On two faces being in contact of block 6 and lower 9 upper end of fixture, several bands are also provided with, for increasing the clamping to sample 5
Power.
Fixture of the invention further includes upper bracket 1 and lower bracket 8, and upper bracket 1 and lower bracket 8 are streaky shape, upper folder
Tool 3 is fixedly installed on upper bracket 1 by screw, and lower fixture 9 is fixedly installed on lower bracket 8 by screw.
Fixture of the invention further includes outer extend bar 11 and interior bar 13 of extending.It extends bar 11 outside and interior bar 13 of extending respectively has one
It is right, and be made of quartz material, to guarantee the rigidity under high temperature.The upper end of two bars 11 of extending outside passes through two heat-resisting spiral shells respectively
Nail 4 is fixedly installed in the both ends of upper bracket 1, and bar 11 of extending outside two is arranged along the vertical direction, and bar 11 of extending outside two is flat
Row.Extend in two upper end of bar 13 is also fixedly installed in the both ends of lower bracket 8 by two resistance to thermal screws 4 respectively, in two
Bar 13 of extending is arranged along the vertical direction, and bar 13 of extending in two is parallel, and bar 13 of extending in two is located at outside two bar of extending
Between 11.
Fixture of the invention further includes lower pull rod 12, and lower pull rod 12 is cylindric bar.Lower fixture 9 passes through the fixed peace of bolt 10
Top loaded on lower pull rod 12.At the middle and lower part position of lower pull rod 12, it is further fixed on saddle 14.The middle part of saddle 14 is provided with
Large through-hole, lower pull rod 12 are passed through from large through-hole.The two sides of saddle 14 are also each there are two small through hole, two difference of bar 11 of extending outside
It is pierced by from two small through hole of position relatively in the outer part, bar 13 of extending in two is respectively from position relatively in the inner part two small
It is pierced by through-hole.Wherein extend outside two bar 11 and 14 position of saddle it is relatively fixed, bar 13 of extending in two can be passed through at it
Small through hole in slidably reciprocate along axial direction.
In the lower position of lower pull rod 12, it is provided with frame 19 of extending.Frame 19 of extending is streaky shape, in frame 19 of extending
Middle part is also equipped with large through-hole, and lower pull rod 12 is pierced by from the large through-hole for extending frame 19, and can be in the big logical of frame 19 of extending
It axially slidably reciprocates in hole along itself.It is extending on frame 19, at the position of large through-hole two sides, is also being each provided with one small logical
The lower end in hole, bar 13 of extending in two is inserted into this two small through hole extended on frame 19 and fixed respectively.In frame 19 of extending
Both ends, are also respectively arranged with through-hole, and two opening sleeves 18 are respectively arranged in the two through-holes at 19 both ends of frame of extending.Each open
Displacement measuring device 17 is also clamped in muzzle 18, institute's displacement measurement device is linear variable difference transformer.It is extending
The side at the every end of frame 19 is mounted on and adjusts bolt 20, and rotation, which adjusts bolt 20, can adjust opening sleeve 18 to measuring system
17 chucking power.
Displacement measuring device 17 has shell and probe, and shell is held within opening sleeve 18.
Fixture of the invention further includes two measurement feet 15, and measurement foot 15 is laminated structure, is respectively arranged at lower pull rod 12
Two sides.One end of two measurement feet 15 is respectively fixedly connected with to two 11 lower ends of bar of extending outside, the other end of two measurement feet 15
On be provided with through-hole, the probe of displacement measuring device 17 is pierced by upwards from the through-hole of measurement foot 15, and is locked by nut 16
Connection.The nut 16 is annular knurl thin nut, has big outer diameter, the displacement that probe can be prevented downward.
As shown in figure 3, being additionally provided with hole in the side of upper fixture 3, thermocouple probe 21 is installed in hole, is being clamped with examination
When sample 5, thermocouple probe 21 is directly in contact with sample 5, can be while guaranteeing fixture intensity, and maximum possible measures sample
5 true temperature.
Small sample of the invention is uniaxially stretched creep test fixture, when in use by required material to be tested according to small
After sample size requires processing to produce, it is packed into and is suitable for small sample Mechanics Performance Testing relevant device, tensile creep can be carried out
Equal Mechanics Performance Testings.
By fusion reactor structural material vanadium alloy be tensile tests at room for, fixture of the invention use process is as follows：
1) vanadium alloy small sample is processed according to small sample standard, and perforated at the both ends of small sample.Small sample is through
In upper fixture 3 and the upper fixture block pin 7 setting in middle part of lower fixture 9.By preloading certain small value force, the coaxial of connecting rod is adjusted
Degree, makes sample and fixture connecting rod in alignment, respectively by other two fixture block pin 7 in upper fixture 3 and lower fixture 9 in upper folder
General fixture block 6 on tool 3 and lower 9 location and installation of fixture, so that general fixture block 6 is adjacent to sample surfaces, and is fixed by screw, so that
Fixture block surface cross lines sting tight sample surfaces；
2) tensile test apparatus loading force is adjusted, clamps sample in advance, eliminates entire chucking appliance system gap, later unloading force
Value is zero, while will deformation and displacement data zero；
3) software end setting sample and stretching data parameters start tension test up to sample fracture, after the test, benefit
With force value and deformation data can drafting material stress-strain diagram, can analyze to obtain the tensile strength of material, yield strength and
The data parameters such as elongation percentage.
By taking the tensile test at high temperature of fusion reactor structural material vanadium alloy as an example, fixture of the invention use process is as follows：
1) small sample processing installation clamps described in example step 1 as above and 2；
2) thermocouple is inserted into fixture design position, while zirconium foil is added outside small sample and surrounds one week, be used for high temperature
Under the conditions of absorb oxygen, heating device is set around test sample and fixture, the fixture for having clamped sample is integrally put into pumping
In vacuum plant；
3) it opens mechanical pump tentatively to be vacuumized, while opening cooling device, when vacuum chamber pressure is lower than 20Pa,
Molecular pump is opened, reaches 1 × 10 to entire Chamber vacuum degree-4At Pa grades, heating is opened, passes through program setting 5-10 ox before heating
Pretightning force of pausing is loaded and is kept, and prevents sample compression when fixture expands in heating process from deforming；
4) heating process controls heating by way of adjusting heater strip power, guarantees that vacuum degree is excellent in entire heating process
In 1 × 10-3Pa；
5) reach 750 DEG C to temperature, keep the temperature 15 minutes, set rate of extension later as 0.2mm/min, start stretching experiment
Until sample fracture, software systems join the experiments such as real-time temperature, vacuum degree and the ess-strain recorded in whole experiment process
Number；
6) data will automatically save for analysis after testing, and close heating system, be down to 300 DEG C to temperature with ShiShimonoseki
Flapper valve partition molecular pump side is closed, simultaneously closes off molecular pump, after stopping completely to molecular pump, while temperature is down to 100
DEG C or less turn off mechanical pump.When vacuum chamber temperature is down to 80 DEG C or less, bolt can be unclamped, opens sealing flange, is taken out
Test sample, experiment are completed.
By taking the creep experiments under high temperature of fusion reactor structural material vanadium alloy as an example, fixture of the invention use process is as follows：
1) sample installation, vacuumize and heating stepses example step 1-4 as above described in；
2) reach 750 DEG C to temperature, keep the temperature 6 hours with complete release clip and high-temperature sample dilatancy, during being somebody's turn to do
After keeping pretightning force to deformation data curve to tend to be completely steady, adjustment loading stress to creep test target value and is kept, and is opened
Beginning creep test.
3) creep test Drawing of Curve after the test, is carried out using deformation data and test period data, can analyze
Obtain the data parameters such as the minimum creep rate of material.
Claims (10)
1. a kind of small sample is uniaxially stretched creep test fixture, including：Upper bracket (1), upper fixture (3), general fixture block (6),
Fixture block pin (7), lower bracket (8), lower fixture (9), bar (11) of extending outside, lower pull rod (12), interior bar of extending (13), saddle (14),
Measure foot (15), nut (16), displacement measuring device (17) and frame of extending (19)；It is characterized in that：
The upper fixture (3) is rectangular shape, and lower end is provided with fixture block pin (7) used for positioning；One universal clamp
Block (6) is fixedly installed on the lower end of upper fixture (3) by screw, is provided with fixture block pin hole on general fixture block (6), fixture block pin hole
Position and the spatial position for the fixture block pin (7) for being set to upper fixture (3) lower end is arranged to match, fixture block pin hole and fixture block pin (7)
Cooperation positions general fixture block (6) in the installation site of upper fixture (3) lower end；General fixture block (6) is fixedly installed in by screw
The lower end of fixture (3)；On two faces being in contact of the general fixture block (6) and upper fixture (3) lower end, also it is provided with several
Band, for increasing the chucking power to sample (5)；
The lower fixture (9) is rectangular shape, and the upper end is also equipped with fixture block pin (7) used for positioning；In lower fixture (9)
Upper end is fixedly installed another general fixture block (6) by screw, is provided with fixture block pin hole, fixture block pin hole on general fixture block (6)
Setting position and the spatial position of the fixture block pin (7) for being set to lower fixture (9) upper end match, fixture block pin hole and fixture block pin
(7) cooperation positions general fixture block (6) in the installation site of upper fixture (3) lower end；On the general fixture block (6) and lower fixture (9)
On two faces being in contact at end, several bands are also provided with, for increasing the chucking power to sample (5)；
The upper bracket (1) and lower bracket (8) are streaky shape, and upper fixture (3) is fixedly installed in the upper branch by screw
On frame (1), lower fixture (9) is fixedly installed on the lower bracket (8) by screw；
It is described outer to extend bar (11) and interior bar of extending (13) respectively has a pair；The upper end of two bars (11) of extending outside is fixedly mounted respectively
It is arranged along the vertical direction in bar (11) of extending outside the both ends of upper bracket (1), two, and bar (11) of extending outside two is parallel；Two
Extend in the root upper end of bar (13) is fixedly installed in the both ends of lower bracket (8) respectively, extends bar (13) along the vertical direction in two
Setting, and extends bar (13) in parallel in two, extend in two bar (13) extended between bar (11) outside two；
The lower pull rod (12) is cylindric bar, and lower fixture (9) is fixedly installed in the top of lower pull rod (12) by bolt (10)；
At the middle and lower part position of lower pull rod (12), it is further fixed on saddle (14)；Large through-hole, lower pull rod are provided in the middle part of saddle (14)
(12) it is passed through from large through-hole；The two sides of saddle (14) are also each there are two small through hole, and two are extended bar (11) respectively from position outside
It is pierced by two small through hole relatively in the outer part, two small through hole of the bar (13) respectively from position relatively in the inner part of extending in two
In be pierced by；Wherein extend outside two bar (11) and saddle (14) position it is relatively fixed, bar (13) of extending in two can be worn at it
It slidably reciprocates in the small through hole crossed along axial direction；
The frame of extending (19) is set to the lower position of lower pull rod (12)；Frame (19) are extended for streaky shape, in frame of extending
(19) large through-hole is also equipped in the middle part of, lower pull rod (12) is pierced by from the large through-hole of frame of extending (19), and can extend
It axially slidably reciprocates in the large through-hole of frame (19) along itself；It is also each at the position of large through-hole two sides on frame of extending (19)
It is provided with a small through hole, the lower end for bar (13) of extending in two is inserted into this two small through hole on frame of extending (19) simultaneously respectively
It is fixed；At the both ends of frame of extending (19), it is also respectively arranged with through-hole, displacement measuring device (17) fixed installation is frame of extending
(19) in the through-hole at both ends；
Institute's displacement measurement device (17) has shell and probe, and the through-hole at frame (19) both ends that are to extend is fixedly mounted in shell
In；
There are two the measurement feet (15), and measurement foot (15) is laminated structure, is respectively arranged at lower pull rod (12) two sides；Two surveys
One end of foot-measuring (15) is respectively fixedly connected with to two bar (11) lower ends of extending outside, is all provided on the other end of two measurements foot (15)
It is equipped with through-hole, the probe of displacement measuring device (17) is pierced by upwards from the through-hole of measurement foot (15), and is locked by nut (16)
Connection；The nut (16) is annular knurl thin nut, has big outer diameter, the displacement that probe can be prevented downward.
2. small sample as described in claim 1 is uniaxially stretched creep test fixture, it is characterised in that：Furniture of the invention is also
Including thermocouple probe (21), it is additionally provided with hole in the side of upper fixture (3), thermocouple probe (21) are installed in hole, are being pressed from both sides
When holding sample (5), thermocouple probe (21) is directly in contact with sample (5), can be maximum while guaranteeing fixture intensity
The true temperature of sample (5) can be capable of measuring.
3. small sample as claimed in claim 2 is uniaxially stretched creep test fixture, it is characterised in that：It is set to upper fixture
(3) it there are three the fixture block pins (7) of lower end, arranges in space in up-side down triangle, and the high line of be in up-side down triangle is located at
On vertical direction.
4. small sample as claimed in claim 3 is uniaxially stretched creep test fixture, it is characterised in that：On upper fixture (3),
It is additionally provided with and wears pin (2), for entire chucking appliance system to be connected with test equipment tensioning system, carry out tensile creep test.
5. small sample as claimed in claim 4 is uniaxially stretched creep test fixture, it is characterised in that：It is set to lower fixture
(9) there are three the fixture block pins (7) of upper end, arrangement triangular in shape in space, and high line triangular in shape is located at vertical direction
On.
6. small sample as claimed in claim 5 is uniaxially stretched creep test fixture, it is characterised in that：The outer bar of extending
(11) it is made with interior bar of extending (13) of quartz material, to guarantee the rigidity under high temperature.
7. small sample as claimed in claim 6 is uniaxially stretched creep test fixture, it is characterised in that：It extends outside described two
The upper end of bar (11) passes through the both ends that two resistance to thermal screws (4) are fixedly installed in upper bracket (1) respectively.
8. small sample as claimed in claim 7 is uniaxially stretched creep test fixture, it is characterised in that：It extends in described two
The upper end of bar (13) passes through the both ends that two resistance to thermal screws (4) are fixedly installed in lower bracket (8) respectively.
9. small sample as claimed in claim 8 is uniaxially stretched creep test fixture, it is characterised in that：Fixture of the invention is also
Including opening sleeve (18), two opening sleeves (18) are respectively arranged in the two through-holes at frame of extending (19) both ends；Each opening
Displacement measuring device (17) are clamped in set (18)；In the side at frame of extending (19) every end, it is mounted on and adjusts bolt (20),
Rotation, which adjusts bolt (20), can adjust opening sleeve (18) to the chucking power of displacement measuring device (17).
10. small sample as claimed in claim 9 is uniaxially stretched creep test fixture, it is characterised in that：Institute's displacement measurement
Device (17) is linear variable difference transformer.
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| CN113447367A (en) * | 2021-06-21 | 2021-09-28 | 广东省科学院工业分析检测中心 | Device for detecting creep property of heat insulation section bar and detection method thereof |
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Application publication date: 20181204 |