CN109100242A - A kind of soldered fitting shear creep performance testing device and test method - Google Patents
A kind of soldered fitting shear creep performance testing device and test method Download PDFInfo
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- CN109100242A CN109100242A CN201810854909.1A CN201810854909A CN109100242A CN 109100242 A CN109100242 A CN 109100242A CN 201810854909 A CN201810854909 A CN 201810854909A CN 109100242 A CN109100242 A CN 109100242A
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- 238000012360 testing method Methods 0.000 title claims abstract description 99
- 238000010998 test method Methods 0.000 title claims abstract description 11
- 238000010008 shearing Methods 0.000 claims abstract description 63
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 238000005219 brazing Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 14
- 238000005096 rolling process Methods 0.000 claims description 13
- 230000005855 radiation Effects 0.000 claims description 10
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 6
- 238000005476 soldering Methods 0.000 claims description 6
- 238000007405 data analysis Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 229910000679 solder Inorganic materials 0.000 claims description 2
- 230000005619 thermoelectricity Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 24
- 230000002146 bilateral effect Effects 0.000 abstract description 2
- 238000010835 comparative analysis Methods 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 206010017076 Fracture Diseases 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 208000013201 Stress fracture Diseases 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- 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
-
- 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
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording 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
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
-
- 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
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0033—Weight
-
- 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
-
- 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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
Abstract
The invention discloses a kind of soldered fitting shear creep performance testing device and test methods, belong to mechanics performance testing technology field.It includes supporting mechanism, heating mechanism, loading mechanism, control mechanism and data gather computer structure, brazing jig is bilateral symmetry, sample is placed respectively in left and right, both the stability that load applies had been ensure that, the Synchronous process of soldered fitting shearing test is realized again, the situation of change that two samples can be compared is conducive to the interference for eliminating extraneous factor under load of the same race.On the other hand, different magnitudes of load can also be applied on brazing jig or so sample, fracture process of the soldered fitting under different load, influence of the better comparative analysis magnitude of load to creep shear fracture process can be observed in a computer.Test device measuring accuracy of the present invention is high, it is easy to operate, sample high-temerature creep process can be observed in real time.
Description
Technical field
The invention belongs to mechanics performance testing technology fields, and in particular to a kind of soldered fitting shear creep performance test dress
It sets and test method.
Background technique
It is brazed a kind of important method connected as material, has been widely used in aerospace, nuclear energy, electronic technology
Etc. in industries, it has many advantages, such as that brazing deformation is small, connector forming is beautiful.However, braze-welded structure is often served in hot environment
In, soldered fitting will receive a variety of load effect of temperature load, pressure, fatigue and internal residual stress, and shearing is soldered fitting
A kind of typical condition being mainly subjected to, at high temperature, creep failure are a kind of typical failure modes of soldered fitting, therefore, are surveyed
Determine the croop property of soldered fitting under shear load to have great importance.
Currently, having put into effect relevant national standard, such as national standard for soldered fitting conventional magnetic shear mechanical property test
GBT11363-2008 " soldering joint strength test method ", base material is processed into tensile sample by standard regulation, using single lap joint
Or two-sided overlapped method, the shear strength of soldered fitting is detected by stretching, it is shear-deformable by being mounted on sample marking distance
The extensometer of section obtains.But the method is not suitable for shear creep test, creep test is a kind of slow rate deformation test,
There is pertinent literature to prove that soldered fitting is deformed in creep rupture very small, is difficult to accurately be deformed with conventional extensometer
As a result, another aspect joint brittleness is larger, there is brittle failure phenomenon in creep rupture, and conventional shearing experiment is difficult to know that soldering connects
Micro-fracture change procedure at head.The prior art mainly has in relation to the research report of soldered fitting mechanical property measuring device:
East China University of Science disclose a kind of soldered fitting croop property measuring device (application number:
201510523097.9), this device can be accurately positioned and measure the croop property of a certain position of soldered fitting, but this device is not
Suitable for shear creep test, and device is complicated, cumbersome.In addition, a kind of soldered fitting is also disclosed in East China University of Science
Mechanic property test method (application number: 201410351317.X), the method are a kind of ambient temperature mechanical properties test method, are adopted
The T-type sample of sample.A kind of soldered fitting mechanical property tests method (bulletin has been invented by China Petroleum Univ. (East-China)
Number: CN103808567B), the method observes the microscopic behavior of material drawing process by scanning electron microscope, and device is multiple
It is miscellaneous and expensive.Shanghai Institute Of Technology discloses a kind of carbide quartz welding joints shear performance testing device (application
Number: 201410781284.2), and the completion dissimilar material soldered fitting that this device can be very easy in existing universal testing machine
Shearing performance test experiment, but this device discomfort shares hot environment.
Since above-mentioned prior art test device is more or less there is technological deficiency, study a kind of soldered fitting
Shear creep performance testing device is necessary.
Summary of the invention
The purpose of the present invention is to provide a kind of soldered fitting shear creep performance testing device and test method, the tests
Device to test precision is high, it is easy to operate, sample high-temerature creep process can be observed in real time and to two samples while can be carried out
Experimental observation.
Its technical solution includes:
A kind of soldered fitting shear creep performance testing device, including supporting mechanism, heating mechanism, loading mechanism, control
Mechanism and data gather computer structure, the supporting mechanism include pedestal, support frame, testing stand and shearing clamp, the support frame
Two support rods including vertical setting, the bottom of two support rods is fixed on the base, connects at the top of two support rods
It is connected to the support frame fixed link being laterally arranged；Testing stand support column, the testing stand support are provided in the middle part of the pedestal
The testing stand is installed in the top of column, and the shearing clamp is located above the testing stand；
The shearing clamp includes fixture base and in the fixture base and two groups of fixtures being parallel to each other are vertical
Plate is provided with fixture boss in the fixture base, and centered on the fixture boss, two groups of fixture vertical plates are in mirror image pair
Claim, every group of fixture vertical plate is inverted L-shaped design, includes a transverse slat and a riser, is provided on the inside of the riser vertical
Board slot, is provided with rolling bearing in the vertical plate slot, for placing two groups of soldered fitting samples on the fixture boss, often
The side of group soldered fitting sample and the rolling bearing are tangent, and the other side is in close contact with another group of soldered fitting sample, when
When test starts, the soldered fitting sample is freely up and down moved along the fixture vertical plate friction free, is arranged on transverse slat
There is shearing pressure head pilot hole；Thermocouple is posted in the soldered fitting specimen surface upper and lower side close to the rolling bearing, another
The medium position of the soldered fitting specimen surface of outer side also posts thermocouple；
The heating mechanism includes heating furnace and infrared radiation heater, and the heating furnace is frame structure, is set
Panel there are six setting, wherein heating furnace upper and lower panel is made of highiy refractory brick and insulating layer, and the panel positioned at bottom is fixed on
On the testing stand support column, heating furnace surrounding panel is made of high-temperature-resistant thermal-insulation glass, and has the panel activity of two sides to connect
It connects on the support frame；The infrared radiation heater is located at the inside of bottom panel；
The loading mechanism includes that shearing pressure head and high temperature resistant counterweight, the shearing pressure head can be pressed by the shearing
Head pilot hole applies load to the soldered fitting sample, and the high temperature resistant counterweight is arranged above the shearing pressure head；
The control mechanism includes temperature sensor, temperature controller, and the temperature sensor is suddenly felt by thermoelectricity
Soldered fitting specimen temperature is answered to change, by the constant of temperature controller Control experiment temperature, the temperature controller connection
There is computer；
The data gather computer structure includes CCD camera, LED white light source, and the LED white light source, CCD camera are equal
On the support frame, the CCD camera also connects on the computer for installation.
As a preferred solution of the present invention, soldered fitting sample is among the different square of two volumes plus pricker
Material soldering is completed to obtain the final product, and the soldered fitting global shape is T shape.
As another preferred embodiment of the invention, the shearing pressure head and high temperature resistant counterweight are by nickel-base alloy system
At.
Further, the shearing pressure head is semicircle, and semicircle radius is 1mm-5mm.
Further, the panel that the heating furnace is located at two sides is rotatably connected on support rod by fixed ring.
It further, is hollow design inside the testing stand support column, thermocouple route is located at the testing stand branch
Inside dagger.
Further, multiple fixed bolt holes are provided in the fixture base, for the shearing clamp to be fixed on
On testing stand.
Further, the load that the loading mechanism is provided to the soldered fitting sample is 10N~10KN.
The present invention also provides the test methods of above-mentioned soldered fitting shear creep performance testing device, successively include following
Step:
A fixes shearing clamp on testing stand, and the soldered fitting sample processed is placed on shearing clamp；
B is sticking thermocouple close to rolling bearing side soldered fitting sample upper and lower ends respectively, is brazed in other side
Also thermocouple is sticked in the middle part of connector base material, and thermocouple wire is passed through in testing stand, support column data string hole；
C installs CCD camera, opens LED white light source, adjusts CCD camera height, makes CCD camera height and soldered fitting
The brazed seam height of sample is consistent, and fixed CCD camera；
D connects by thermocouple wire cut-in temperature sensor, and by temperature sensor, temperature controller, infrared radiation heater
It connects, accesses computer；
CCD camera data analysis Acquisition Instrument is accessed computer by e, and is debugged, and the original image of soldered fitting sample is anti-
It reflects in a computer, acquires preparation state into data；
F is packed into shearing pressure head above soldered fitting sample, is placed in shearing pressure head on the base material of soldered fitting sample,
It shears and is placed on pressure head and apply the comparable high temperature resistant counterweight of load；
G closes heating furnace, opens heating furnace switch, heats to stove, and is adopted simultaneously using the analysis of CCD camera data
Collect instrument and data acquisition is carried out to strain；
H breaks soldered fitting sample, and record strain time graph is removed from CCD camera data analysis Acquisition Instrument, according to
Magnitude of load used draws shear stress strain curve, obtains soldered fitting shear strength.
Compared with prior art, present invention offers following advantageous effects:
1) compared with conventional magnetic shear creep test device, soldered fitting sample is easily installed this test device, and is not needed
Extensometer is installed, operating process is greatly simplified；
2) this test device is realized to be applicable in two soldered fittings simultaneously and be tested, and on the one hand improves test effect
Rate, while test error is also reduced, greatly improve measuring accuracy；
3) infrared radiation heater in device can realize quick heating, can guarantee test sample by temperature controller
In constant hot environment；
4) the soldered fitting shearing sample of the applicable different height of shearing clamp, width, test sample size range are wide；
5) deformation of creep is tested using DIC loading by means of digital image correlation method, automatically records the deformation data of sample, improves test
Precision, and realize the real-time change process of shearing test process.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawing:
Fig. 1 is soldered fitting shear creep performance testing device overall structure diagram of the invention；
Fig. 2 is the perspective view of shearing clamp in soldered fitting shear creep performance testing device in the present invention；
Fig. 3 is shearing clamp side view in soldered fitting shear creep performance testing device of the invention；
Fig. 4 is soldered fitting sample schematic diagram used in soldered fitting shear creep performance testing device of the invention；
Fig. 5 is soldered fitting shear creep performance testing device testing stand and support rod connection schematic diagram of the invention；
The corresponding relationship of figure label and each component is as follows:
1- pedestal；2- infrared radiation heater；3- heating furnace fixed ring；4- bearing；5- high-temperature-resistant thermal-insulation glass；6- shearing
Fixture；7- heating furnace support rod；8- support frame fixed link；9- support frame fixture nut；Surface cover above and below 10- heating furnace；11- pricker
Plumb joint sample one；12- shears pressure head；13- high temperature resistant counterweight；14- soldered fitting sample two；15- thermocouple；16-LED white light
Light source；17- light source support rod；18- support frame；19- camera support bar；20- computer；21-CCD camera；The control of 22- temperature
Instrument；23- temperature sensor；24- testing stand support column；25- testing stand fixture nut；26- testing stand；27- shearing clamp is fixed
Bolt；28- stationary shaft；29- fixing screws；30- shears pressure head pilot hole, 31- fixture vertical plate, 32- fixed bolt hole, 33- folder
Have pedestal, 34- fixture boss, 35- vertical plate slot, 36- rolling bearing, 37- brazed seam, 38- base material.
Specific embodiment
It is of the invention in order to make the invention proposes a kind of soldered fitting shear creep performance testing device and test method
Advantage, technical solution are clearer, clear, elaborate combined with specific embodiments below to the present invention.
In conjunction with shown in Fig. 1 to Fig. 5, the present invention is a kind of soldered fitting shear creep performance testing device, including support machine
Structure, heating mechanism, loading mechanism, control mechanism and data gather computer structure, wherein supporting mechanism includes that pedestal 1, heating furnace are fixed
Ring 3, shearing clamp 6, heating furnace support rod 7, support frame fixed link 8, support frame fixture nut 9, support frame 18, testing stand 26；
Pedestal 1 is located at the device bottommost, and support frame 18 is mounted on the base, and support frame 18 is preferably with the support of two vertical settings
The lower end of bar is fixed together with pedestal, can such as be fixed by bolt hole and bolt cooperation, in order to keep the stability of support frame,
Using the top of the support rod of 8 two vertical setting of lateral connection of the support frame fixed link being laterally arranged, so connection can
Enhance the stability of support frame, portion is provided with testing stand support column 24 in the base, and one side is another for fixing testing stand
Aspect preferably sets hollow shape for the inside of the testing stand support column, convenient for introducing various routes, in test process
Thermocouple route installs testing stand 26 in the top of testing stand support column, is cooperated by testing stand fixture nut 25 and fixed, shearing
Fixture 6 is located above testing stand.
The structure of shearing clamp specifically combines shown in Fig. 2 and Fig. 3, including shears pressure head pilot hole 30, fixture vertical plate 31, consolidates
Determine bolt hole 32, fixture base 33, fixture boss 34, vertical plate slot 35, rolling bearing 36, fixture vertical plate is arranged in fixture base
On, fixture boss is set between them, and two groups of fixture vertical plates are in mirror symmetry along fixture boss, and being designed in this way can put
Set two groups of soldered fitting samples.Every group of fixture vertical plate its section is inverted L-shaped design, includes a transverse slat and a riser, perpendicular
It is provided with vertical plate slot on the inside of plate, rolling bearing 4 is provided in vertical plate slot, is tried on fixture boss for placing two groups of soldered fittings
Sample, soldered fitting sample 1 and soldered fitting sample 2 14, the side of every group of soldered fitting sample and rolling bearing are tangent, when
When test starts, soldered fitting sample is freely up and down moved along fixture vertical plate friction free, and shearing pressure head is provided on transverse slat
Pilot hole；When needing to test, thermocouple 15 is posted in the soldered fitting specimen surface upper and lower side close to rolling bearing, in addition
The medium position of the soldered fitting specimen surface of side also posts thermocouple.Multiple fixing bolts are set in fixture base 33
Hole cooperates shearing clamp fixing bolt 27, for shearing clamp to be fixed on testing stand.Such as the side view of Fig. 3 shearing clamp
In, stationary shaft 28, fixing screws 29, bearing 4.The structure of above-mentioned shearing clamp designs, and can place two groups of soldered fitting examinations
Sample, shearing pressure head pilot hole are located on transverse plate, and shearing pressure head 12 can be made to move up and down without friction, and fixture base, which is equipped with, fixes
Bolt hole is stably connected with it with testing stand for fixing the shearing clamp.
Heating mechanism includes heating furnace and infrared radiation heater 2, wherein heating furnace upper and lower panel by highiy refractory brick and
Insulating layer composition, heating furnace surrounding panel are made of high-temperature-resistant thermal-insulation glass 5, and heating furnace is rotatable by support rod, fixed ring
It is fixed on support frame.
Loading mechanism includes T-type pressure head and high temperature resistant counterweight 13, and high temperature resistant counterweight is put on T-type shearing pressure head, is passed through
Load is applied on soldered fitting sample by pressure head.Control mechanism includes temperature sensor 23, temperature controller 22, computer
Changed Deng, temperature sensor by the thermocouple induction specimen temperature being pasted on sample, passes through temperature controller guarantee test
Temperature it is constant, temperature controller is connected on computer, can clearly observe temperature change in burner hearth by computer.Data
Collecting mechanism needs to acquire the shear strain in shearing test, and obtains shear strain and become firstly the need of the shearing for obtaining sample
Shape acquires acquisition by being placed in the data gather computer structure outside heating furnace indirectly.Data gather computer structure include CCD camera 21,
LED white light source 16, computer etc., LED white light source are installed on support frame by light source support rod 17, and data acquire camera
It is installed on support frame by camera support bar 19, camera is connect with computer.When test, LED white light source and data are opened
Camera is acquired, data acquire shearing test situation of change in camera real-time monitoring heating furnace, and camera is by collected electronic speckle
Image transmitting is handled to computer 20, obtains shear-deformable, and obtains soldered fitting brazed seam 37 before shear fracture
Change procedure.
Pressure head is semicircle in the present invention, and semicircle radius is 1mm-5mm.
Pressure head can be moved up and down along guide sleeve in the present invention.
Sample employed in the present invention is T-type soldered fitting, and structure is simple, by two different small cube base materials
Between can be brazed completion plus solder, do not need specific brazing jig, it is easy to operate.
Load needed for soldered fitting shearing is typically small, and the application of side crops industry can be achieved in the present invention, and load applies range
Larger, shear-type load range is 10N~10KN.
Brazing jig is bilateral symmetry, places sample respectively in left and right, not only ensure that the stability that load applies, but also
The Synchronous process for realizing soldered fitting shearing test, can compare the situation of change of two samples, under load of the same race
Be conducive to eliminate the interference of extraneous factor.On the other hand, different magnitudes of load can also be applied on brazing jig or so sample,
Fracture process of the soldered fitting under different load can be observed in a computer, and better comparative analysis magnitude of load is to creep
The influence of shear fracture process.
Shearing clamp in the present invention is able to achieve the soldered fitting shearing test of different size size.If fixture riser height
For H, it is S that pressure head, which is oriented to hole length, and vertical plate slot length and width are respectively L and D, and fixture projection width and height are W and B, is stood
Plate and boss spacing are T, and each scale diagrams are as shown in Figure 2.If the length, width and height of brazed coupon are respectively a, b, c, such as Fig. 4 institute
Show.The relationship met is needed between each size are as follows:
Vertical plate and boss spacing T of the fixture projection width W more than or equal to 2 times；
The sum of the projection width W of vertical plate and boss spacing T and 1/2 need to be more than or equal to specimen height c；
Vertical plate groove width D the specimen height a at least more than 2/3 times, the riser height H less than 1/2 times；
Boss height B has to be larger than specimen height a；
The sum of boss height B and vertical plate groove width D need to be less than riser height H；
Vertical plate slot length L is equal with shearing pressure head pilot hole S；
The width b of institute's test sample need to be less than or equal to 1.5 times of vertical plate slot length L.
When test device specific works of the present invention, specific work process is as follows:
(1) shearing test clamp is fixed on testing stand, and the soldered fitting sample processed is placed in shearing sample
On fixture.
(2) thermocouple is being sticked respectively close to bearing side soldered fitting base material upper and lower ends, connecing in other side soldering
Also thermocouple is sticked in the middle part of head base material, and thermocouple wire is passed through in testing stand, support column data string hole.
(3) CCD camera is installed, LED white light source is opened, CCD camera height is adjusted, connects CCD camera height with soldering
Head brazed seam height is consistent, and fixed CCD camera.
(4) by thermocouple wire cut-in temperature sensor, and by temperature sensor, temperature controller, infrared radiation heater
Connection accesses computer.
(5) CCD camera data analysis Acquisition Instrument is accessed into computer, debugs strain analysis Acquisition Instrument, by soldered fitting original
Beginning image reflects in a computer, acquires preparation state into data.
(6) it is packed into shearing pressure head above sample, is placed in pressure head on base material 38, placed on pressure head and applies load phase
When high temperature resistant counterweight.
(7) heating furnace is closed, heating furnace switch is opened, stove is heated, and analyzed simultaneously using CCD camera data
Acquisition Instrument carries out data acquisition to strain.
(8) sample is broken, record strain time graph is removed from data collecting instrument and is drawn according to magnitude of load used
Shear stress strain curve obtains soldered fitting shear strength.
The part that do not address in the present invention uses or uses for reference prior art and can be realized.
Although more herein used the terms such as heating furnace fixed ring 3, bearing 4, high-temperature-resistant thermal-insulation glass 5,
But it does not exclude the possibility of using other terms.It should be noted that those skilled in the art under the introduction of this specification
Any equivalent way or obvious variant made should all be within the scope of the present invention.
Claims (9)
1. a kind of soldered fitting shear creep performance testing device, including supporting mechanism, heating mechanism, loading mechanism, control machine
Structure and data gather computer structure, it is characterised in that:
The supporting mechanism includes pedestal, support frame, testing stand and shearing clamp, and the support frame includes the two of vertical setting
A support rod, the bottom of two support rods is fixed on the base, is connected with the branch being laterally arranged at the top of two support rods
Support fixed link；Testing stand support column is provided in the middle part of the pedestal, described in the top installation of the testing stand support column
Testing stand, the shearing clamp are located above the testing stand；
The shearing clamp includes fixture base and in the fixture base and two groups of fixture vertical plates being parallel to each other,
Fixture boss is provided in the fixture base, centered on the fixture boss, two groups of fixture vertical plates are in mirror symmetry, and every group
Fixture vertical plate is inverted L-shaped design, includes a transverse slat and a riser, vertical plate slot, institute are provided on the inside of the riser
It is provided with rolling bearing in the vertical plate slot stated, is used to place two groups of soldered fitting samples, every group of soldering on the fixture boss
The side of joint samples and the rolling bearing are tangent, and the other side is in close contact with another group of soldered fitting sample, when test is opened
When the beginning, the soldered fitting sample is freely up and down moved along the fixture vertical plate friction free, and shearing is provided on transverse slat
Pressure head pilot hole；
The heating mechanism includes heating furnace and infrared radiation heater, and the heating furnace is frame structure, is provided with
Six panels, wherein heating furnace upper and lower panel is made of highiy refractory brick and insulating layer, and the panel positioned at bottom is fixed on described
Testing stand support column on, heating furnace surrounding panel is made of high-temperature-resistant thermal-insulation glass, and has the panel of two sides to be movably connected in
On support frame；；The infrared radiation heater is located at the inside of bottom panel；In the soldered fitting close to the rolling bearing
Specimen surface upper and lower side posts thermocouple, also posts thermoelectricity in the medium position of the soldered fitting specimen surface of other side
It is even；
The loading mechanism includes that shearing pressure head and high temperature resistant counterweight, the shearing pressure head can be led by the shearing pressure head
Soldered fitting sample described in Xiang Kongxiang applies load, and the high temperature resistant counterweight is arranged above the shearing pressure head；
The control mechanism includes temperature sensor, temperature controller, and the temperature sensor passes through thermocouple induction pricker
The variation of plumb joint specimen temperature, by the constant of temperature controller Control experiment temperature, the temperature controller is connected with meter
Calculation machine；
The data gather computer structure includes CCD camera, LED white light source, and the LED white light source, CCD camera are respectively mounted
On the support frame, the CCD camera also connects on the computer.
2. a kind of soldered fitting shear creep performance testing device according to claim 1, it is characterised in that: soldered fitting
Sample is to complete to obtain the final product among the different square of two volumes plus solder brazing, and the soldered fitting global shape is T
Shape.
3. a kind of soldered fitting shear creep performance testing device according to claim 1, it is characterised in that: described cuts
It hobs head and high temperature resistant counterweight is made of nickel-base alloy.
4. a kind of soldered fitting shear creep performance testing device according to claim 3, it is characterised in that: described cuts
Head is hobbed as semicircle, semicircle radius is 1mm-5mm.
5. a kind of soldered fitting shear creep performance testing device according to claim 1, it is characterised in that: described adds
The panel that hot stove is located at two sides is rotatably connected on support rod by fixed ring.
6. a kind of soldered fitting shear creep performance testing device according to claim 1, it is characterised in that: the examination
Testing is hollow design inside platform support column, and thermocouple route is located inside the testing stand support column.
7. a kind of soldered fitting shear creep performance testing device according to claim 1, it is characterised in that: the fixture
Multiple fixed bolt holes are provided on pedestal, for the shearing clamp to be fixed on testing stand.
8. a kind of soldered fitting shear creep performance testing device according to claim 1, it is characterised in that: described adds
The load that mounted mechanism is provided to the soldered fitting sample is 10N~10KN.
9. the test method of described in any item soldered fitting shear creep performance testing devices according to claim 1~8, special
Sign is, successively the following steps are included:
A fixes shearing clamp on testing stand, and the soldered fitting sample processed is placed on shearing clamp；
B is sticking thermocouple close to rolling bearing side soldered fitting sample upper and lower ends respectively, in other side soldered fitting
Also thermocouple is sticked in the middle part of base material, and thermocouple wire is passed through in testing stand, support column data string hole；
C installs CCD camera, opens LED white light source, adjusts CCD camera height, makes CCD camera height and soldered fitting sample
Brazed seam height be consistent, and fixed CCD camera；
D is connected by thermocouple wire cut-in temperature sensor, and by temperature sensor, temperature controller, infrared radiation heater, is connect
Enter computer；
CCD camera data analysis Acquisition Instrument is accessed computer by e, and is debugged, and the original image of soldered fitting sample is reflected in
In computer, preparation state is acquired into data；
F is packed into shearing pressure head above soldered fitting sample, is placed in shearing pressure head on the base material of soldered fitting sample, is shearing
It is placed on pressure head and applies the comparable high temperature resistant counterweight of load；
G closes heating furnace, opens heating furnace switch, heats to stove, and analyzes Acquisition Instrument using CCD camera data simultaneously
Data acquisition is carried out to strain；
H breaks soldered fitting sample, record strain time graph is removed from CCD camera data analysis Acquisition Instrument, according to used
Magnitude of load draws shear stress strain curve, obtains soldered fitting shear strength.
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| CN201810854909.1A CN109100242B (en) | 2018-07-31 | 2018-07-31 | Device and method for testing shearing creep property of brazed joint |
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| CN201810854909.1A CN109100242B (en) | 2018-07-31 | 2018-07-31 | Device and method for testing shearing creep property of brazed joint |
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| CN109100242B CN109100242B (en) | 2020-12-25 |
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