CN113447349A - Shell fragment fatigue test device - Google Patents
Shell fragment fatigue test device Download PDFInfo
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- CN113447349A CN113447349A CN202110725873.9A CN202110725873A CN113447349A CN 113447349 A CN113447349 A CN 113447349A CN 202110725873 A CN202110725873 A CN 202110725873A CN 113447349 A CN113447349 A CN 113447349A
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 12
- 239000012634 fragment Substances 0.000 title claims description 9
- 238000003825 pressing Methods 0.000 claims abstract description 35
- 230000003287 optical effect Effects 0.000 claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 2
- 230000010354 integration Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 11
- 238000012360 testing method Methods 0.000 abstract description 10
- 230000002427 irreversible effect Effects 0.000 abstract description 7
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 125000004122 cyclic group Chemical group 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 17
- 230000008034 disappearance Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- G01N3/02—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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
-
- 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
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- 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
- G01N2203/0073—Fatigue
-
- 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
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
-
- 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
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the field of shrapnel production, in particular to a shrapnel fatigue testing device which comprises an objective table, a reciprocating mechanism, a pressing needle structure, a light-emitting element and a light receiver, wherein a clamp for fixing the shrapnel is arranged on the objective table, the pressing needle structure is arranged on the moving end of the reciprocating mechanism and driven by the reciprocating mechanism to do reciprocating motion in the vertical direction so as to repeatedly apply force to the shrapnel on the clamp; the light-emitting element is arranged in the pressing pin structure, and forms a light spot at the contact point of the pressing pin structure and the elastic sheet, the light spot is shielded when the pressing pin structure presses downwards to contact the elastic sheet, and the light spot reappears when the pressing pin structure lifts upwards to separate from the elastic sheet; the optical receiver is used for detecting a light spot signal; the invention can test the relationship between the irreversible deformation and the cyclic compression times in the metal fatigue of the elastic sheet.
Description
Technical Field
The invention relates to the field of shrapnel production, in particular to a shrapnel fatigue degree testing device.
Background
The hardware elastic sheet is ubiquitous in life, and is a mechanical part which works by using elasticity. Typically made of hardware spring steel. The device is used for controlling the movement of a machine member, steep impact or vibration, energy storage, measurement of force and the like, and is widely applied to machines and appearances. The varieties of the hardware elastic pieces are various and are divided according to the shapes, and the hardware elastic pieces mainly comprise spiral hardware elastic pieces, scroll hardware elastic pieces, plate hardware elastic pieces and the like.
As is known, metal fatigue can occur to metal materials after repeated stress, for elastic sheets which work by means of elasticity, the metal fatigue is the main reason of failure, and the relationship between the number of working cycles of the elastic sheets and the metal fatigue degree is determined by accurate tests, so that the stability of the operation of equipment provided with the elastic sheets is improved.
Disclosure of Invention
In view of the above, an object of the present invention is to overcome the defects in the prior art, and provide a device for testing fatigue of a spring, which can test the relationship between irreversible deformation and the number of cyclic compression times in metal fatigue of the spring.
The invention relates to a device for testing fatigue of a spring plate, which comprises:
the object stage is provided with a clamp for fixing the elastic sheet;
the reciprocating mechanism is arranged above the objective table and is provided with a moving end;
the needle pressing structure is arranged on the moving end of the reciprocating mechanism and driven by the reciprocating mechanism to reciprocate up and down to apply force to the elastic sheet on the clamp repeatedly;
the light-emitting element is arranged in the pressing pin structure, and forms a light spot at the contact point of the pressing pin structure and the elastic sheet, the light spot is shielded when the pressing pin structure presses downwards to be in contact with the elastic sheet, and the light spot reappears when the pressing pin structure lifts upwards to be separated from the elastic sheet;
the optical receiver is used for detecting a light spot signal;
and the analysis equipment is used for acquiring the displacement information of the pressing pin structure and the feedback signal of the light receiver.
Further, the reciprocating mechanism is fixed through a rack on one side of the objective table, and the rack is connected with the objective table through a pitching rotating shaft.
Further, the reciprocating mechanism is a linear motor, and a displacement sensor for measuring displacement is arranged on one side of the linear motor.
The needle pressing structure comprises a sleeve and a needle rod, the sleeve and the needle rod are both of a hollow structure, an annular seat and a light-gathering lens group are arranged in the sleeve, the light-emitting element is a plurality of point light sources and is annularly arranged on the annular seat around the central axis of the sleeve, and the light-gathering lens group comprises a first lens assembly located below the light-emitting element and a second lens assembly arranged at the upper end of the needle rod.
Further, the light emitting element is an infrared light source, and the corresponding light receiver is an infrared receiver.
Further, a converter is arranged at the bottom of the sleeve, the needle rod is arranged on the converter, an objective lens is arranged at the other conversion position of the converter, an image sensor is integrated at the upper part of the sleeve, the objective table comprises a horizontal fine-tuning platform, and the clamp is arranged on the horizontal fine-tuning platform.
The coaxial visible light source system comprises a vertical light source for inputting visible light and a beam splitter arranged in the irradiation direction of the vertical light source, a polarizer is arranged between the beam splitter and the vertical light source, and the beam splitter is arranged above the annular seat.
Further, anchor clamps are including adjusting the seat and adjusting the structure, it is in to adjust the seat through the pivot rotation setting on the objective table, adjust the structure including setting up epaxial worm wheel and with worm wheel meshed's worm, the other end of worm is provided with the crank.
Furthermore, the clamp further comprises a placing disc which is arranged on the adjusting seat and used as a mounting plane, and a pressure sensor is arranged between the placing disc and the adjusting seat.
The invention has the beneficial effects that: the invention discloses a device for testing fatigue of a spring plate, which drives a press pin structure to repeatedly apply force to the spring plate on an objective table through a reciprocating mechanism, wherein a light-emitting element in the press pin structure can form light spots on the spring plate, the light spots are shielded when the press pin structure is pressed down to be in contact with the spring plate, the light spots reappear when the press pin structure is lifted up to be separated from the spring plate, and an optical receiver can accurately receive optical signals of the press pin structure in contact with and separation from the spring plate, so that the size of the compression deformation of the spring plate is determined, and the relationship between the working cycle number of the spring plate and the metal fatigue degree can be determined by comparing the recovery degree of the spring plate after N times of force application through analytical equipment.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a side view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic cross-sectional view of the sleeve of the present invention;
FIG. 4 is a schematic diagram of the present invention illustrating force applied to a spring plate;
fig. 5 is a schematic structural view of the jig of the present invention.
Description of reference numerals: the device comprises an object stage 100, a frame 101, a horizontal fine adjustment platform 102, a clamp 103, an adjusting seat 1031, an object placing tray 1032, a pressure sensor 1033, a reciprocating mechanism 200, a displacement sensor 201, a needle pressing structure 300, a sleeve 301, a needle rod 302, a first lens assembly 303, a second lens assembly 304, a converter 305, an objective lens 306, an image sensor 307, a vertical light source 308, a polarizer 309, a beam splitter 310, a light-emitting element 311, an annular seat 312 and a light receiver 313.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-5, the device for testing fatigue of a shrapnel in this embodiment includes an object stage 100 and a frame 101, the object stage 100 is used for bearing the shrapnel to be tested, a fixture 103 for fixing the shrapnel is disposed on an upper end surface of the object stage 100, the frame 101 extends upward from one side of the object stage 100, and a mounting platform is formed on a side edge of the upper end, and the mounting platform is connected to the object stage 100 through a pitch rotation axis, so as to adjust a pitch angle, a reciprocating mechanism 200 is disposed on the mounting platform, the reciprocating mechanism 200 has a moving end, the moving end reciprocates in a longitudinal direction according to a certain frequency to drive a presser pin structure 300 disposed on the moving end to move, so as to simulate an actual working condition of the shrapnel to press a cantilever portion of the shrapnel to be tested on the fixture 103, and during a continuous pressing process, the shrapnel deforms and recovers to an original state alternately, and as the pressing times increase, the elastic sheet generates metal fatigue, the deformation part generates micro cracks, and the elastic sheet can not be completely restored to the initial state, so that the cantilever of the elastic sheet can displace towards the pressing direction, and the elasticity can also be reduced, under the actual condition, the irreversible change can bring predictable risks to the equipment using the elastic sheet, for example, the elastic sheet used as the electrical connection can cause poor contact after the metal fatigue is generated due to repeated pressing, the elastic sheet used for damping gradually loses efficacy due to the metal fatigue, and the like, so that the relation between the irreversible deformation of the elastic sheet in the metal fatigue state and the pressing times is determined to have practical significance.
In this embodiment, the needle pressing structure 300 has a hollow sleeve 301 and a hollow needle bar 302, the sleeve 301 has a light emitting element 311 and a light focusing lens group, the needle bar 302 is coaxially disposed at the bottom of the sleeve 301, light emitted from the light emitting element 311 is focused by the light focusing lens group and then enters the needle bar 302, a part of the light passes through the needle bar 302 and then irradiates on a spring plate to form a light spot, and the invention further includes a light receiver 313, in this embodiment, the light receiver 313 is disposed on the frame 101, and is used for receiving a light spot signal and generating an electrical signal to be transmitted to an external analysis device.
In a reciprocating process of the needle pressing structure 300, the needle pressing structure 300 goes through a pressing process and a lifting process, in both processes, the needle bar 302 is accelerated, decelerated at a constant speed (or at a constant speed), and if the acceleration and the constant speed are controlled to be consistent, it can be considered that the time of the pressing process is consistent with that of the lifting process, for example, in the pressing process, when the end of the needle bar 302 is not in contact with the elastic sheet, the light spot formed by the light emitting element 311 is consistent and can be sensed by the light receiver, when the needle bar 302 is in contact with the elastic sheet, the light spot disappears, the light receiver does not generate an electric signal, in the lifting process, the light spot disappears and then reappears, and in the single pressing process, the irreversible deformation of the elastic sheet is small and can be ignored,therefore, the time length of the light spot disappearance in the pressing process is consistent with the time length of the light spot disappearance in the lifting process, if the time length of the single reciprocating process is defined as T, the time length of the light spot existence in the pressing process is T1The time length of the disappearance of the light spot is t2Then T is 2 (T)1+t2) At the same time, the distances from the highest point to the surface of the spring plate and from the surface of the spring plate to the lowest point (defined as H respectively) which can be reached by the end of the needle bar 302 can be obtained according to the speed of the reciprocating motion1And H2) In practical tests, if the frequency of the reciprocating mechanism 200 is fixed, T is a fixed value, and H is compared between 1 st and N +1 st times2Difference, namely acquiring the irreversible deformation of the elastic sheet after N times of stress, and collecting N and 2N … … N2And obtaining the metal deformation gradient diagram of the elastic sheet by the secondary irreversible deformation.
In the present embodiment, the reciprocating mechanism 200 for reciprocating up and down may employ a relatively conventional and reliable crank slider mechanism, a push rod cam mechanism, a cylinder, a linear screw module, etc., but is preferably a linear motor with a relatively high precision,
in some other embodiments, the position of the end of the needle bar 302 can also be obtained by a displacement sensor 201 arranged in cooperation with a linear motor, the displacement sensor 201 is a magnetic grating ruler or a grating ruler, and the positioning accuracy can be controlled to be 0.001mm, but of course, the positioning accuracy can also be implemented in cooperation with various modes, so that the analysis equipment can obtain more accurate displacement information.
In a preferred embodiment, the light emitting element 311 for forming the light spot is an infrared light source, and the corresponding light receiver 313 is an infrared receiver, and the interference resistance is improved by selecting infrared light with a specific wavelength for emitting and receiving.
In the invention, the light emitting element 311 forms a coaxial light source in the sleeve 301, specifically, an annular seat 312 is arranged in the sleeve 301, the light emitting element 311 is a plurality of point light sources, the point light sources are annularly arranged on the annular seat 312 around the central axis of the sleeve 301, a first lens assembly 303 in a light collecting lens assembly is arranged below the light emitting element 311, the first lens assembly 303 completes light collection and mixing, a second lens assembly 304 is arranged at the upper end part of the needle bar 302, the mixed light source from the first lens assembly 303 is converted into parallel light, the parallel light is emitted along the axial direction of the needle bar 302, and a light spot is formed on a spring plate to be tested.
The bottom of the sleeve 301 is provided with a converter 305, the needle bar 302 is arranged on the converter 305, and an objective lens 306 is arranged on another conversion position of the converter 305 except the needle bar 302, so that the objective lens 306 can be switched to the position of the original needle bar 302 by using the converter 305, an image sensor 307 is integrated on the upper part of the sleeve 301, an observation optical path is formed between the image sensor 307 and the elastic sheet, and the observation optical path penetrates through the middle of the annular seat 312 to avoid the blockage of the annular seat 312 and the light-emitting element 311.
In the actual use process, the spring plate subjected to repeated stress has cracks at the position of the elastic arm, a microscopic magnification device is usually needed for observing the crack form, at the moment, the objective lens 306 in the converter 305 is only needed to be switched into an observation light path, meanwhile, for two-dimensional microscopic observation of the spring plate, the objective table comprises a horizontal fine adjustment platform 102 at the upper part, and the clamp 103 is arranged on the horizontal fine adjustment platform 102.
In this embodiment, a coaxial visible light source system is further included for illuminating the spring plate along the hollow needle shaft 302 during the alignment of the spring plate to form a visible light spot while providing sufficient brightness during microscopic observation. Specifically, the coaxial visible light source system comprises a vertical light source 308 for inputting visible light and a beam splitter 310 arranged in the irradiation direction of the vertical light source 308, a polarizer 309 is arranged between the beam splitter 310 and the vertical light source 308, the beam splitter 310 is arranged above the annular seat 312, the visible light becomes a uniform surface light source after passing through the polarizer 309, the beam splitter, the first lens assembly 303 and the objective 306 and irradiates on the elastic sheet, in the scattering process, a part of the visible light upwards propagates to the image sensor 307 for imaging, in the process, the path of the visible light can be defined as an illumination light path, and the illumination light path passes through the center of the annular seat 312.
The variety of shell fragment is numerous, and the atress direction of some shell fragments is rather than installing the face perpendicular to it, and some is the side shell fragment that connects, and it is installed on the lateral wall of certain equipment, and outside application of force direction is less even parallel with the installation face contained angle, for example the battery shell fragment in the battery case, in order to be close to the service behavior of shell fragment as far as possible when testing, consequently utilize when the fixed shell fragment of anchor clamps 103 need press close to reality as far as possible, that is to say the installation angle of anchor clamps 103 needs adjustable.
In this embodiment, the clamp 103 includes an adjusting seat 1031 and an adjusting structure, the adjusting seat 1031 is rotatably disposed on the stage 100 through a rotating shaft, the adjusting structure includes a worm wheel disposed on the rotating shaft and a worm engaged with the worm wheel, and a crank is disposed at the other end of the worm.
In this embodiment, the clamp 103 further includes a tray 1032 disposed on the adjusting seat 1031 as a mounting plane, a pressure sensor 1033 is disposed between the tray 1032 and the adjusting seat 1031, and the pressure sensor 1033 can detect a pressure perpendicular to the mounting plane when the resilient plate is fixed on the tray 1032 and repeatedly stressed.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. The utility model provides a shell fragment fatigue test device which characterized in that includes:
the object stage is provided with a clamp for fixing the elastic sheet;
the reciprocating mechanism is arranged above the objective table and is provided with a moving end;
the needle pressing structure is arranged on the moving end of the reciprocating mechanism and driven by the reciprocating mechanism to reciprocate up and down to apply force to the elastic sheet on the clamp repeatedly;
the light-emitting element is arranged in the pressing pin structure, and forms a light spot at the contact point of the pressing pin structure and the elastic sheet, the light spot is shielded when the pressing pin structure presses downwards to be in contact with the elastic sheet, and the light spot reappears when the pressing pin structure lifts upwards to be separated from the elastic sheet;
the optical receiver is used for detecting a light spot signal;
and the analysis equipment is used for acquiring the displacement information of the pressing pin structure and the feedback signal of the light receiver.
2. The elastic sheet fatigue testing device according to claim 1, characterized in that: the reciprocating mechanism is fixed through a rack on one side of the objective table, and the rack is connected with the objective table through a pitching rotating shaft.
3. The elastic sheet fatigue testing device according to claim 1, characterized in that: the reciprocating mechanism is a linear motor, and one side of the linear motor is provided with a displacement sensor for measuring displacement.
4. The elastic sheet fatigue testing device according to claim 1, characterized in that: the needle pressing structure comprises a sleeve and a needle rod, the sleeve and the needle rod are both of a hollow structure, an annular seat and a light-gathering lens group are arranged in the sleeve, the light-emitting elements are a plurality of point light sources and are annularly arranged on the annular seat around a central axis of the sleeve, and the light-gathering lens group comprises a first lens assembly located below the light-emitting elements and a second lens assembly arranged at the upper end of the needle rod.
5. The elastic sheet fatigue testing device according to claim 4, wherein: the light-emitting element is an infrared light source, and the corresponding light receiver is an infrared receiver.
6. The elastic sheet fatigue testing device according to claim 4, wherein: the telescopic bottom is provided with the converter, the needle bar sets up on the converter, be provided with objective on the other conversion position of converter, telescopic upper portion integration has image sensor, the objective table includes horizontal fine setting platform, anchor clamps set up on the horizontal fine setting platform.
7. The elastic sheet fatigue testing device of claim 6, wherein: the coaxial visible light source system comprises a vertical light source for inputting visible light and a beam splitter arranged in the irradiation direction of the vertical light source, a polarizer is arranged between the beam splitter and the vertical light source, and the beam splitter is arranged above the annular seat.
8. The elastic sheet fatigue testing device according to claim 1, characterized in that: anchor clamps are including adjusting the seat and adjusting the structure, it is in to adjust the seat through the pivot rotation setting on the objective table, adjust the structure including setting up change epaxial worm wheel and with worm wheel meshed's worm, the other end of worm is provided with the crank.
9. The elastic sheet fatigue testing device according to claim 8, wherein: the clamp further comprises a material placing disc which is arranged on the adjusting seat and used as a mounting plane, and a pressure sensor is arranged between the material placing disc and the adjusting seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110725873.9A CN113447349A (en) | 2021-06-29 | 2021-06-29 | Shell fragment fatigue test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110725873.9A CN113447349A (en) | 2021-06-29 | 2021-06-29 | Shell fragment fatigue test device |
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| Publication Number | Publication Date |
|---|---|
| CN113447349A true CN113447349A (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110725873.9A Pending CN113447349A (en) | 2021-06-29 | 2021-06-29 | Shell fragment fatigue test device |
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| CN (1) | CN113447349A (en) |
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|---|---|---|---|---|
| CN101571467A (en) * | 2008-04-30 | 2009-11-04 | 中国科学院金属研究所 | Test system and test method for dynamic bending fatigue property of thin film material |
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| CN201680822U (en) * | 2009-11-27 | 2010-12-22 | 燕山大学 | Online detection system for measuring length and diameter of moving object |
| CN104307758A (en) * | 2014-09-25 | 2015-01-28 | 浙江海洋学院 | Express item sorter |
| CN105738229A (en) * | 2016-02-04 | 2016-07-06 | 香港城市大学深圳研究院 | High-frequency fatigue testing device and micro-topography observing device |
| CN207215624U (en) * | 2017-08-04 | 2018-04-10 | 祥鑫科技股份有限公司 | A kind of shell fragment fatigue detection device |
| CN207606001U (en) * | 2017-10-11 | 2018-07-13 | 贵州金沙蓉瑾礼品有限公司 | A kind of textile automatic sorting apparatus |
| CN208334100U (en) * | 2018-07-13 | 2019-01-04 | 武汉微衡工业系统有限公司 | A kind of bending fatigue test device of sheet metal specimens |
| CN109668797A (en) * | 2018-03-12 | 2019-04-23 | 西南交通大学 | A kind of reverse micro move fatigue experimental device and test method based on synchrotron radiation |
| CN211012879U (en) * | 2019-12-31 | 2020-07-14 | 许玉香 | Area size measuring equipment based on laser mapping for clothing factory |
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2021
- 2021-06-29 CN CN202110725873.9A patent/CN113447349A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571467A (en) * | 2008-04-30 | 2009-11-04 | 中国科学院金属研究所 | Test system and test method for dynamic bending fatigue property of thin film material |
| CN201680822U (en) * | 2009-11-27 | 2010-12-22 | 燕山大学 | Online detection system for measuring length and diameter of moving object |
| CN201653834U (en) * | 2010-01-25 | 2010-11-24 | 广州市驷雄五金有限公司 | Full-automatic anti-fatigue tester based on metal dome |
| CN104307758A (en) * | 2014-09-25 | 2015-01-28 | 浙江海洋学院 | Express item sorter |
| CN105738229A (en) * | 2016-02-04 | 2016-07-06 | 香港城市大学深圳研究院 | High-frequency fatigue testing device and micro-topography observing device |
| CN207215624U (en) * | 2017-08-04 | 2018-04-10 | 祥鑫科技股份有限公司 | A kind of shell fragment fatigue detection device |
| CN207606001U (en) * | 2017-10-11 | 2018-07-13 | 贵州金沙蓉瑾礼品有限公司 | A kind of textile automatic sorting apparatus |
| CN109668797A (en) * | 2018-03-12 | 2019-04-23 | 西南交通大学 | A kind of reverse micro move fatigue experimental device and test method based on synchrotron radiation |
| CN208334100U (en) * | 2018-07-13 | 2019-01-04 | 武汉微衡工业系统有限公司 | A kind of bending fatigue test device of sheet metal specimens |
| CN211012879U (en) * | 2019-12-31 | 2020-07-14 | 许玉香 | Area size measuring equipment based on laser mapping for clothing factory |
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Application publication date: 20210928 |
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