CN109556971A - The cold spraying sample bending property experimental rig of direct-reading bending angle - Google Patents
The cold spraying sample bending property experimental rig of direct-reading bending angle Download PDFInfo
- Publication number
- CN109556971A CN109556971A CN201810744288.1A CN201810744288A CN109556971A CN 109556971 A CN109556971 A CN 109556971A CN 201810744288 A CN201810744288 A CN 201810744288A CN 109556971 A CN109556971 A CN 109556971A
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- sleeve
- positioning pin
- pedestal
- measuring instrument
- direct
- Prior art date
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- 238000005452 bending Methods 0.000 title claims abstract description 49
- 238000010288 cold spraying Methods 0.000 title claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 54
- 239000011248 coating agent Substances 0.000 claims abstract description 47
- 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 abstract description 36
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 abstract description 43
- 238000013001 point bending Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 229910001315 Tool steel Inorganic materials 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 8
- 238000010791 quenching Methods 0.000 description 8
- 230000000171 quenching effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending 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
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
-
- 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
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
-
- 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
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of cold spraying sample bending property experimental rig of direct-reading bending angle, pedestal one end are equipped with limit plate;Centralized positioning pin is installed at base center dowel hole, and center rests against sleeve and is mounted on centralized positioning pin;Upper support positioning pin is installed on supporting pin mounting hole, and upper stop sleeve is mounted on support positioning pin;Afterburner handle is frame shape, and afterburner handle one end is installed on centralized positioning pin, and afterburner handle be freely rotated can around centralized positioning pin;The frame shape of afterburner handle has stress application sleeve perpendicular to pedestal, afterburner handle frame shape middle part;Stress application sleeve is loaded on afterburner handle through reinforcing pin;There are semi-circular recesses on pedestal, angel measuring instrument placement is installed in semi-circular recesses.The present invention has situations such as carrying out coating sample three point bending test and the during the test deformation of observation sample coatings face, cracking, disbonding in real time, reads the function of bending angle data in real time.The present invention is simple, compact-sized, light-weight, is convenient for carrying.
Description
Technical field
The invention belongs to coating sample mechanical property test and detection device technical fields.More particularly to it is a kind of it is portable can
Varying-thickness cold spraying sample bend test device.The especially mechanical test dress of the test of cold spraying coating bending property and detection
It sets.
Background technique
Coating sample refers to the rectangular patch sample of coating, is made of matrix, coating two parts.To examine performance,
Carry out quantitative analysis frequently with three point bending test.By the way that band coating sample to be measured is bent to certain angle, observation coating examination
Test deformation, cracking, peeling conditions evaluate the comprehensive performances such as strength of coating, toughness and coating/basal body interface interlaminar shear strength.
The bend test of conventional coatings is completed by electronic universal tester.When bend test, testing machine is in compression test mode.If
Specific purpose tool is counted, is placed on testing machine between push-down head, band coating sample to be measured is placed in the support of the two o'clock on push-down head
On fixture, coating is face-down, and a cylinder is placed under seaming chuck, is placed in band coating sample center to be measured, as shown in Figure 1.Starting
Testing machine, pressure head move down, and to band coating sample upper surface center to be measured, at lower surface both ends, fulcrum is counter makees on cylinder top below
Under firmly, band coating sample to be measured occurs bending and deformation.Stop test after stroke as defined in reaching, removes to be measured band coating
Sample measures bending angle.
It will be seen from figure 1 that conventional coatings sample bend test has following deficiency: 1, can not intuitively read bending angle degree
According to can only then pass through by the relative displacement between push-down head on bending angle and press machine come estimating test stop condition
Double measurement obtains band coating sample bending angle data to be measured.2, since there are flexible deformations for band coating sample to be measured
Area, the bending angle of band coating sample to be measured is deposited with the double measurement angle under unconstrained state under restrained condition on testing machine
In difference, to the higher material of yield strength when special, the two error is very big, and it is misjudged to even result in test result.3, it tries
Sample coatings are face-down when testing, and can not observe band coating situation of change to be measured in experimentation in real time, analyze to be measured band coating
Failure damage critical point.4, equipment is huge, heavy, can not move, it is difficult to adapt to the requirement that production scene is quickly analyzed.
Summary of the invention
The present invention provides a kind of cold spraying sample bending property test for capableing of direct-reading bending angle in view of the above deficiencies
Device realizes that test is direct in the process and measures, reads bending angle, observes band coating sample situation of change to be measured, accurately divide
Band coating sample failure critical point to be measured, while the device compact overall structure are analysed, it is light-weight, realize portable function.
Technical solution of the invention includes that pedestal, angel measuring instrument, centralized positioning pin and center rest against sleeve, upper branch
Support positioning pin and upper stop sleeve, limit plate, afterburner handle;Pedestal is a cuboid, and pedestal one end is equipped with limit plate;In pedestal
There are centralized positioning pin hole, upper supporting pin mounting hole in portion;Centralized positioning pin is installed at base center dowel hole, and center rests against set
Cylinder is mounted on centralized positioning pin;Upper support positioning pin is installed on supporting pin mounting hole, and upper stop sleeve is mounted on support
On positioning pin;Afterburner handle is frame shape, and afterburner handle one end is installed on centralized positioning pin, makes afterburner handle can be around centralized positioning
Pin is freely rotated;The frame shape of afterburner handle has stress application sleeve perpendicular to pedestal, afterburner handle frame shape middle part;Stress application sleeve is through reinforcing
Pin is loaded on afterburner handle;There are the semi-circular recesses for placed angle measuring instrument on pedestal, the depth of semi-circular recesses is angle
The thickness of measuring instrument is spent, angel measuring instrument placement is installed in semi-circular recesses.
Stress application sleeve to center in afterburner handle of the present invention rests against sleeve distance and is equal to upper stop sleeve to center
Rest against the distance of sleeve.
The zero point of angel measuring instrument of the present invention is located at center and rests against sleeve side, the zero point of angel measuring instrument and center
The connecting line rested against between sleeve is parallel with limit plate.
The straight flange of angel measuring instrument of the present invention is parallel with limit plate, and zero point to the center of angel measuring instrument rests against sleeve
Vertical range be equal to angel measuring instrument the supreme stop sleeve of zero point vertical range.
Angel measuring instrument of the present invention is placed in the semi-circular recesses of pedestal, and plane is lower than on pedestal on angel measuring instrument
Plane, or it is concordant with plane on pedestal.
Pedestal on the inside of limit plate of the present invention has backing plate, and the height of backing plate is identical as afterburner handle lower frame height.
Angle measurement pointer is housed in afterburner handle of the present invention, is used to indicate the angle that afterburner handle turns over during testing
Degree, i.e., band coating sample bending angle to be measured.
Center of the present invention rests against 1-10 times that excircle of sleeve cylinder radius is band coating sample thickness to be measured.
Stop sleeve, stress application sleeve external cylindrical surface radius are R10 ± 5mm in the present invention.
Compared with prior art, the present invention solve solve traditional mechanics testing machine on carry out three point bending test can not be real
Shi Zhiguan reads sample bending angle, variation in sample bending process can not be observed in real time and due to equipment is huge and nothing
Method is moved to the problem of production scene carries out quickly test service, and the present invention utilizes lever principle, is applied manually by afterburner handle
Power simplifies force application mechanism, to keep experimental rig more compact practical, avoids conventional hydraulic or electric force application mechanism is huge
Greatly, heavy disadvantage.The present invention can read sample bending angle in real time, and three-point bending on traditional mechanics testing machine is avoided to need to try
Sample removes carry out double measurement, causes sample restrained condition to change, thus bring angle measurement system error.During test
Sample situation of change can be observed in real time.Pedestal and stress application sleeve of the invention, upper stop sleeve, central supported tube-in-tube structure make to
The sample of measuring tape coating is in edge-on state during the test, can facilitate and observe band coating sample variation to be measured and failed
Journey, and conventional test methods band coating sample coatings to be measured are face-down, can not observe in real time during the test, can only try
After testing, removes band coating sample to be measured and observed.
The present invention has following beneficial effect:
1, the present invention realizes right during the irrealizable bending angle direct-reading of traditional mechanics test Apparatus for Bending at low-temp institute, test
The real-time overview function of band coating sample to be measured can observe the deformation of sample coatings face, cracking, coating in real time during the test
Situations such as peeling, reads bending angle data in real time.
2, the present invention solves the bending angle measuring technique problem under constraint condition, avoids and passes under experimental condition, angle
Bending angle measurement error caused by sample rebound, improves the accuracy of bend test when degree measurement.
3, the present invention is simple, compact-sized, light-weight, is convenient for carrying, and solving traditional mechanics testing machine can not move, is difficult
To realize the live technical problem quickly tested.
Detailed description of the invention
Fig. 1 is the operation schematic diagram of the prior art.
Fig. 2 is structural schematic diagram of the invention.
In figure: 1, pedestal;2, limit plate;3, center rests against sleeve;4, centralized positioning pin;5, afterburner handle;6, it reinforces
Pin;7, band coating sample to be measured;8, stress application sleeve;9, angle measurement pointer;10, angel measuring instrument;11, upper support positioning
Pin;12, upper stop sleeve.
Specific embodiment
The invention will be further described with example with reference to the accompanying drawing.
In Fig. 2, the present invention includes that pedestal 1, angel measuring instrument 10, centralized positioning pin 4 and center rest against sleeve 3, upper support
Positioning pin 11 and upper stop sleeve 12, limit plate 2, afterburner handle 5, reinforcing pin 6 and stress application sleeve 8, angle measurement pointer 9.Its
In, pedestal 1 is a cuboid, is machined with centralized positioning pin hole, upper supporting pin mounting hole, limit plate installation screw above;Limit
Plate 2 is installed on pedestal by screw and limits on screw hole.Angel measuring instrument 10 is metal material standard protractor, facilitates installation, tears open
It unloads, periodic verification;Have one on pedestal 1 for placing the semi-circular recesses of protractor, the depth of semi-circular recesses is protractor
Thickness, protractor placement are installed in semi-circular recesses, and after guaranteeing installation protractor, protractor upper surface is lower than to be measured band coating
Sample holding plane, avoid between protractor and band coating sample to be measured generate interference.Centralized positioning pin 4 is installed on pedestal
At centralized positioning pin hole, center rests against sleeve 3 and is mounted on centralized positioning pin.Upper support positioning pin 11 is installed on supporting pin peace
Hole is filled, sleeve 12 is mounted on support positioning pin.Limit plate 2 is installed on pedestal by screw and limits on screw hole.Afterburner handle 5
It is made by carbon tool steel, thermally treated quenching, subzero treatment and lonneal ensure that structure stability and dimensionally stable
Property.5 fixing end of afterburner handle is installed on centralized positioning pin 4, and afterburner handle 5 be freely rotated can around centralized positioning pin 4, be used for
Indicate the angle that afterburner handle turns over during testing, i.e., band coating sample bending angle to be measured.Reinforcing pin 6 is fixedly installed in
It reinforces on pin hole, stress application sleeve 8 is installed on reinforcing pin, and stress application sleeve outer diameter is processed by R10.Angle measurement pointer 9, which is mounted in, to be added
On power handle 5, it is used to indicate the angle that afterburner handle turns over during testing, i.e., band coating sample bending angle to be measured.
Pedestal 1 of the present invention is made by carbon tool steel, and thermally treated quenching, subzero treatment and lonneal are protected
Structure stability and dimensional stability are demonstrate,proved.
Centralized positioning pin of the present invention and center rest against sleeve and are made by carbon tool steel, thermally treated quenching, depth
Cold treatment and lonneal, ensure that structure stability and dimensional stability.By 232 bend test of metal materials method of GB/T
Requirement to bending pressure head diameter, center rests against excircle of sleeve cylinder radius and executes by tested exemplar product standard regulation, for
8 times of the sample thickness of measuring tape coating.
Upper support positioning pin of the present invention and upper stop sleeve are made by carbon tool steel, thermally treated quenching, depth
Cold treatment and lonneal, ensure that structure stability and dimensional stability.Upper stop sleeve external cylindrical surface radius is added by R10
Work.
Limit plate of the present invention is made by carbon tool steel, and thermally treated quenching, subzero treatment and lonneal are protected
Structure stability and dimensional stability are demonstrate,proved.Limit plate structure controls band coating sample lengthwise position to be measured, guarantees
Under test three-point bending mode, symmetry of the band coating sample to be measured with respect to central supported point.
Afterburner handle of the present invention is made by carbon tool steel, thermally treated quenching, subzero treatment and lonneal,
It ensure that structure stability and dimensional stability.
Reinforcing of the present invention pin and stress application sleeve are made by carbon tool steel, thermally treated quenching, subzero treatment and
Lonneal ensure that structure stability and dimensional stability.
Angle measurement pointer of the present invention is made by carbon tool steel, and thermally treated quenching, subzero treatment and low temperature return
Fire ensure that structure stability and dimensional stability.
When carrying out bend test, by band coating sample 7 to be measured be placed in base center rest against sleeve and upper stop sleeve,
Between stress application sleeve, matrix is made to rest against sleeve, coat side towards upper stop sleeve, stress application sleeve facing towards center.Along to measuring tape
The propelled longitudinally band coating sample to be measured of the sample of coating makes its top touch limit plate, guarantees band coating sample to be measured
It is symmetrical that position with respect to center rests against sleeve.Afterburner handle is touched counterclockwise, makes stress application sleeve, upper stop sleeve, central supported set
Cylinder and band coating sample contacts to be measured, adjust the angle measuring instrument, and afterburner handle upper angle measurement pointer is made to be directed toward 0.Inverse time
Needle slowly pushes afterburner handle, carries out bend test, band coating sample to be measured is in stress application sleeve, upper stop sleeve, center branch
Occur bending and deformation under three active forces of support set cylinder, can observe in real time at this time band coating sample coatings face deformation to be measured, cracking,
Situations such as disbonding, while reading bending angle data.When test bends to predetermined angular or failure damage occurs, test
Stop.
Claims (9)
1. a kind of cold spraying sample bending property experimental rig of direct-reading bending angle, it is characterised in that: including pedestal (1), angle
Degree measuring instrument (10), centralized positioning pin (4) and center rest against sleeve (3), upper support positioning pin (11) and upper stop sleeve (12),
Limit plate (2), afterburner handle;Pedestal (1) is a cuboid, and pedestal (1) one end is equipped with limit plate (2);In having in the middle part of pedestal (1)
Heart dowel hole, upper supporting pin mounting hole;Centralized positioning pin (4) is installed at base center dowel hole, and center rests against sleeve
(3) it is mounted on centralized positioning pin (4);Upper support positioning pin (11) is installed on supporting pin mounting hole, upper stop sleeve (12)
It is mounted in support positioning pin (11);Afterburner handle (5) is frame shape, and afterburner handle (5) one end is installed on centralized positioning pin (4)
On, afterburner handle (5) be freely rotated can around centralized positioning pin (4);The frame shape of afterburner handle (5) is perpendicular to pedestal (1), reinforcing
There are stress application sleeve (8) in the middle part of handle (5) frame shape;Stress application sleeve (8) is loaded on afterburner handle (5) through reinforcing pin;Pedestal has one on (1)
For the semi-circular recesses of placed angle measuring instrument, the depth of semi-circular recesses is the thickness of angel measuring instrument, angel measuring instrument
(10) it places and is installed in semi-circular recesses.
2. the cold spraying sample bending property experimental rig of direct-reading bending angle according to claim 1, it is characterised in that: institute
State stress application sleeve (8) to the center on afterburner handle (5) rest against sleeve (3) distance be equal to upper stop sleeve (12) to center rest against
The distance of sleeve (3).
3. the cold spraying sample bending property experimental rig of direct-reading bending angle according to claim 1, it is characterised in that: institute
The zero point for stating angel measuring instrument is located at center and rests against sleeve (3) side, the zero point of angel measuring instrument and center rest against sleeve (3) it
Between connecting line it is parallel with limit plate (2).
4. the cold spraying sample bending property experimental rig of direct-reading bending angle according to claim 1, it is characterised in that: institute
The straight flange for stating angel measuring instrument (10) is parallel with limit plate (2), and zero point to the center of angel measuring instrument rests against the vertical of sleeve (3)
Distance is equal to the vertical range of the supreme stop sleeve of zero point (12) of angel measuring instrument.
5. the cold spraying sample bending property experimental rig of direct-reading bending angle according to claim 1, it is characterised in that: institute
Angel measuring instrument is stated to be placed in the semi-circular recesses of pedestal (1), on angel measuring instrument plane lower than plane on pedestal (1), or with
Plane is concordant on pedestal (1).
6. the cold spraying sample bending property experimental rig of direct-reading bending angle according to claim 1, it is characterised in that: institute
Stating the pedestal (1) on the inside of limit plate (2) has backing plate, and the height of backing plate is identical as afterburner handle (5) lower frame height.
7. the cold spraying sample bending property experimental rig of direct-reading bending angle according to claim 1, it is characterised in that: add
Angle measurement pointer (9) are housed on power handle (5).
8. the cold spraying sample bending property experimental rig of direct-reading bending angle according to claim 1, it is characterised in that: in
The heart rests against 1-10 times that sleeve (3) external cylindrical surface radius is band coating sample thickness to be measured.
9. the cold spraying sample bending property experimental rig of direct-reading bending angle according to claim 1, it is characterised in that: on
Stop sleeve, stress application sleeve external cylindrical surface radius are R10 ± 5mm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201810744288.1A CN109556971B (en) | 2018-07-09 | 2018-07-09 | Cold spraying sample bending performance test device capable of directly reading bending angle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810744288.1A CN109556971B (en) | 2018-07-09 | 2018-07-09 | Cold spraying sample bending performance test device capable of directly reading bending angle |
Publications (2)
Publication Number | Publication Date |
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CN109556971A true CN109556971A (en) | 2019-04-02 |
CN109556971B CN109556971B (en) | 2024-01-05 |
Family
ID=65864580
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Application Number | Title | Priority Date | Filing Date |
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CN201810744288.1A Active CN109556971B (en) | 2018-07-09 | 2018-07-09 | Cold spraying sample bending performance test device capable of directly reading bending angle |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112630067A (en) * | 2020-11-30 | 2021-04-09 | 中国兵器工业第五二研究所烟台分所有限责任公司 | Multi-angle bending test device for stud welding sample |
CN112649020A (en) * | 2020-11-30 | 2021-04-13 | 西安航天三沃机电设备有限责任公司 | Multifunctional calibration testing device suitable for inertia assembly |
CN113176151A (en) * | 2021-04-01 | 2021-07-27 | 天津市信泰科技发展有限公司 | Nail bending angle detection device penetrates |
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JPH11183349A (en) * | 1997-12-19 | 1999-07-09 | Mitsubishi Heavy Ind Ltd | Crack generation limit test method for coating |
US6460263B1 (en) * | 1998-02-20 | 2002-10-08 | Amada Electronics Company, Limited | Method and apparatus for measuring bending angle and system for measuring bending angle using the same apparatus |
JP2003004612A (en) * | 2001-06-20 | 2003-01-08 | Akebono Brake Res & Dev Center Ltd | Method for evaluating mixed state of stirred frictional material |
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CN105698650A (en) * | 2015-12-16 | 2016-06-22 | 中国人民解放军第五七九工厂 | Supporting roller type test device for dynamically monitoring bending angle |
CN107110751A (en) * | 2014-12-23 | 2017-08-29 | 海德鲁铝业钢材有限公司 | Equipment for implementing bend test |
CN208459172U (en) * | 2018-07-09 | 2019-02-01 | 湖北超卓航空科技股份有限公司 | The cold spraying sample bending property experimental rig of direct-reading bending angle |
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JPH11183349A (en) * | 1997-12-19 | 1999-07-09 | Mitsubishi Heavy Ind Ltd | Crack generation limit test method for coating |
US6460263B1 (en) * | 1998-02-20 | 2002-10-08 | Amada Electronics Company, Limited | Method and apparatus for measuring bending angle and system for measuring bending angle using the same apparatus |
JP2003004612A (en) * | 2001-06-20 | 2003-01-08 | Akebono Brake Res & Dev Center Ltd | Method for evaluating mixed state of stirred frictional material |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112630067A (en) * | 2020-11-30 | 2021-04-09 | 中国兵器工业第五二研究所烟台分所有限责任公司 | Multi-angle bending test device for stud welding sample |
CN112649020A (en) * | 2020-11-30 | 2021-04-13 | 西安航天三沃机电设备有限责任公司 | Multifunctional calibration testing device suitable for inertia assembly |
CN112630067B (en) * | 2020-11-30 | 2022-12-02 | 中国兵器工业第五二研究所烟台分所有限责任公司 | Multi-angle bending test device for stud welding sample |
CN113176151A (en) * | 2021-04-01 | 2021-07-27 | 天津市信泰科技发展有限公司 | Nail bending angle detection device penetrates |
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