CN209606222U - A kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device - Google Patents
A kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device Download PDFInfo
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- CN209606222U CN209606222U CN201920047197.2U CN201920047197U CN209606222U CN 209606222 U CN209606222 U CN 209606222U CN 201920047197 U CN201920047197 U CN 201920047197U CN 209606222 U CN209606222 U CN 209606222U
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- fracture
- metal material
- line monitor
- monitor device
- material toughness
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Abstract
The utility model discloses a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Devices, including fixed times fixed focus-type long range microscope, and three-dimensional regulation platform includes coarse adjustment and accurate adjustment section, CCD industrial camera, computer.Alternative traditional fatigue crack monitoring method, can real-time online detect two, the sample expansion process for showing fatigue crack, the sharp straight crackle met the requirements of the standard can be obtained.The utility model can solve the problem of fatigue crack prefabrication difficulty, the especially sample containing residual stress weld seam and welding heat affected zone.It is easy to operate, and high reliablity improves measurement accuracy and efficiency, is greatly reduced underproof fracture toughness specimen caused by human factor.
Description
Technical field
The utility model belongs to Fracture of Metal Material toughness performance measurement technical field, in particular to institute is prefabricated tired in sample
Labor crack length long range on-Line Monitor Device.
Background technique
Fracture toughness is widely used in evaluating the performance that material includes base material, fracture is resisted in Seam and heat effected zone.It is right
In laboratory fracture toughness specimen, the mode for generalling use machining processes one section of slot, then by fatigue test by mark
The sharp crack of the prefabricated 2mm of the prefabricated regulation recommended in standard or so.Destructive test especially black brittleness destructive test is being done,
The length of fatigue crack can significantly affect test result.Thus just prefabricating fatigue crack process is done in ASTM E1921 standard
Strict regulations first out: the difference of the average value of the precrack length measured by 9 methods and 9 crackles is no more than trying
The maximum value of 5% or 0.5mm of sample thickness is ineffective sample if being more than.Second: to weld seam or heat affected area sample due to
Remaining residual stress will lead to crackle and deflect in expansion process in the inhomogeneities and sample of crack surface surrounding tissue,
It is ineffective sample if deflection is excessive.
During fracture toughness is entirely tested, the precise measurement of fatigue crack is one of key factor.It is adopted at present
It is direct method that the method for measurement fatigue crack, which is broadly divided into two class one kind, such as common method of reading, in situ measurement method, foil gauge
Method；Another kind of is the variation of the other physical signals reaction crack lengths of indirect method, such as acoustic-emission, equivalent potential method etc.,
It is wherein especially relatively high with the precision of common method of reading.
The operating procedure of common method of reading is to unload sample from fatigue tester after recycling several times, and put
The length that crackle is read under metallographic microscope is set, there is also following problems although this method precision is higher.It, must when reading
So to stop the average load and alternating load of testing machine, to be formed between " load-stopping reading-reading-loads again "
Disconnected formula measurement pattern, measurement efficiency is low, bothersome laborious.And clamping may result in sample holder and to neutral parameter again
It changes, influences test result.Secondly, uninstall process destroys the continuity of crack Propagation.
Therefore, to obtain accurate Fracture of Metal Material toughness, seek more accurate fatigue crack test method to pass
It is important.The utility model for fatigue crack it is straight/deficiency of indirect method, propose to use long range microscopic observation system and everything tune
The combination of the equipment such as bracket is saved, to reach the accuracy for improving crack Propagation linear measure longimetry and realization to Fatigue process
Visual purpose proposes specific embodiment.
Utility model content
The purpose of this utility model is to provide a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device,
Technical problems to be solved are to provide that a kind of structure is simple, easy to use, the accurate Fracture of Metal Material toughness specimen of measurement is tired
Labor crackle on-line measurement device, so as to accurately determine Resisting fractre index, this designs and manufactures many important features
It is of great significance.Its advantage is that entire measurement process can not counted by human interference, crackle real time length and deflection angle
Software on-line measurement in calculation machine, crack propagation process are transferred to computer by CCD industrial camera real-time capture to realize extension
Process visualization.
The technical solution of the utility model includes:
A kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device, including long range microscope, the length
It is mounted in everything fine adjustment stage apart from electronmicroscopic level, the everything fine adjustment stage is fixed on shape steel bracket；It is aobvious over long distances
The eyepiece end of micro mirror is connected with the camera end of CCD camera, over long distances microscopical object mirror alignment specimen surface, and sample is parallel
Two sides respectively correspond two sets of measuring systems；The signal output end of CCD industrial camera is connected with computer, can be in functional software
Upper realization imaging and measurement；
The Fracture of Metal Material toughness specimen crack length on-Line Monitor Device may be implemented long away from the examination of inner fracture toughness
The real-time detection of two face cracks of sample.
Further, the shape steel bracket is placed on firm banking.
Further, the everything fine adjustment stage is fine positioning platform, is made of everything bracket, can support three directions
On fine adjustment.
According to a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device described in the utility model, the dress
It sets including three-dimensional regulation platform, the three-dimensional regulation platform includes coarse positioning platform and fine positioning platform, and coarse positioning platform is by type
Steel bracket connects pedestal and constitutes, and can support to move in the Y direction；Fine positioning platform is made of everything bracket, can support three
Fine adjustment on direction.
According to a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device described in the utility model, over long distances
Microscope is fixed times fixed focus-type, thus avoids many and diverse demarcation flow；Its field range is 4mm, and resolution ratio is 1 μm.
According to a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device described in the utility model, the length
Industrial camera, fixed times camera lens, tight shot, objective lens etc. are linked in sequence in microscope.
According to a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device described in the utility model, the dress
It sets comprising industrial camera and receiving module, picture signal can be converted and be transmitted on computer；It is filled by the measurement of computer
It is standby, it can be with the length and deflection angle of real-time measurement crackle.
A kind of two light sources of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device pass through in the utility model,
It is fixed on formed steel base.
In the utility model fatigue crack long range microscopic observation system include: long range microscope, industrial camera CCD,
Fixed times tight shot, adjustable platform pedestal, light source, computer are equipped with the functional software such as measurement of taking pictures；The long range is micro-
Mirror is horizontally arranged in everything fine adjustment stage, and everything platform is fixed on shape steel bracket；The camera end of the CCD camera and it is long away from
It is connected from microscopical eyepiece end, microscopical object mirror alignment specimen surface, two parallel sides of sample respectively correspond two
Cover measuring system；The signal output end of the CCD industrial camera is connected with computer, and imaging and survey can be realized on functional software
Amount.Its brief measurement method is as follows: fixture (a) being used on fatigue tester, to pass through the specimen clamping after simple polishing
Coarse adjustment knob and sliding fashioned iron position allow eyepiece camera lens substantially face specimen surface；(b) two sets of CCD cameras and department of computer science are connected
System, opening light source and adjusting light source position makes its registration coupon surface；(c) by vernier knob, adjusting direction up and down makes
Machining slot tip falls in the suitable position of presentation system, makes it that clearly surface be presented；(d) start fatigue tester, reference
Determined prefabricating fatigue crack regulation in ASTM E1921 inputs average load and alternating load.By real-time in display screen
Image can accurately measure the length of two face cracks of sample；If it find that length difference measured by two surfaces is more than
0.1mm, that should shut down in time and turn sample holder mode, compensate both sides crackle difference with this, recycled with this until measuring
The crackle on two surfaces all reaches the precrack of 2mm.At the same time it can also be split according to the collected photo analysis of CCD camera
The reason of propagation direction generation just moves in line deflection process, can adjust in time in this way, in case it is tough to obtain invalid fracture
Property sample.
In order to solve the orientation problem of long range microscopic observation system, while being equipped with fashioned iron locating platform and everything branch
Frame.It is equipped with coarse adjustment and micro-tensioning system simultaneously in horizontal and vertical direction.The two, which combines, can not only be accurately positioned but also drop
Low cost.Center rest can be both formed using the stability and locating slot of fashioned iron, it also can coarse adjustment horizontal position.Everything platform
Sample face any position can be navigated to by belonging to fine adjustment stage.
The utility model has the beneficial effects that
The utility model combination long range microscope positions fashioned iron and everything bracket, CCD industrial camera, signal conversion system
System, light source, the equipment such as computer acquire the image of crack tip, propose a kind of Fracture of Metal Material toughness specimen crack length
On-Line Monitor Device realizes real-time measurement and visualization during fracture toughness specimen fatigue crack prefabrication.It can be accurate
The length for measuring any time fatigue crack exchanges the side of compensation by recycling when being more than 0.1mm to two length surface differences
Method can solve two different problems of extended surface speed, so as to precast the pre- crackle met the requirements of the standard.In real time
Crack image, may also help in us and measure deflection angle in crack propagation process, this can help us to acquire image point
Analysis deflection reason, to reach the available straight and uniform crackle of extension.
What long range microscope was selected is fixed times fixed focus-type, and amplification factor and focal length are, the advantage of doing so is that subtracting significantly
The complexity of small operation does not need to change amplification factor and focal length, it is only necessary to can be in display screen by thick fine adjustment platform
Present clearly as.Again since to be fixed times fixed-focus demarcate and determine benchmark except this after, it is very big in this way there is no need to demarcate every time
Reduce workload.
Detailed description of the invention
Fig. 1 is a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device figure of the utility model；
Fig. 2 is long range microscopie unit figure；
In figure: 1-CCD camera, 2- computer display, 3-Y directional trim knob, 4- firm banking, 5-X directional trim
Knob, 6- long range microscope, 7-CT sample, 8- everything bracket, the direction 9-Y coarse adjustable stage, fixed times of lens construction signal of 10-
Figure, 11- tight shot structural schematic diagram, 12- objective lens structural schematic diagram, 13-Z directional trim knob.
Specific embodiment
Explanation and specific example are described in further detail the utility model with reference to the accompanying drawing.
As shown in Figure 1, 2, a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device, including it is aobvious over long distances
Micro mirror, long range electronmicroscopic level are mounted in everything fine adjustment stage, and everything fine adjustment stage is fixed on shape steel bracket；Fashioned iron branch
It is placed on firm banking；Eyepiece end microscopical over long distances is connected with the camera end of CCD camera, object lens microscopical over long distances
In face of quasi- specimen surface, two parallel sides of sample respectively correspond two sets of measuring systems；The signal output end of CCD industrial camera
It is connected with computer, by the display module of image transmitting to calculating, imaging and measurement can be realized on functional software；The gold
Belonging to material fracture toughness sample crack length on-Line Monitor Device may be implemented long two away from inner fracture toughness specimen face cracks
Real-time detection.
Everything fine adjustment stage is coarse-fine adjusting platform, is controlled by artificial adjusting knob.The long range micro objective is just
Sample is shown.Two covering devices correspond respectively to two crack surfaces of sample.
Above-mentioned long range determines times fixed focus-type microscope, is suitable for certain distant surveillance, can be in various severe conditions
Lower work, such as high and low temperature environment, thermal shock and various corrosion pernicious gas operating conditions etc..Fixed times camera lens, tight shot, object lens mirror
Head is sequentially connected.
The coarse adjustment platform, coarse positioning platform are made of fashioned iron connection pedestal, can support to move in the Y direction.By type
Steel and pedestal are built.
Fine positioning platform is made of everything bracket, is fixed on coarse adjustment platform, can be supported on tri- directions XYZ
Fine adjustment.
The display module, after fatigue tester applies average load and alternating load, after certain cycle-index
The crackle of two crack surfaces starts to extend.Real-time crack extending length and deflection are measured by the measuring tool in display module
Angle.If two length surfaces or deflection angle are more than certain calibration.It shuts down and adjusts or overturn sample.With the side mutually compensated
Formula allows two crackles shown are almost isometric to extend and larger deflection does not occur.
Illustrate the first use process of the utility model with reference to the accompanying drawing:
First by fracture toughness specimen such as CT sample 7, it is installed in fatigue tester.This measuring device is tried as fatigue
Test the front and rear sides of machine.Allow the surface of two groups of microscopical object lens face tested samples over long distances.
Start computer, opens the software of display module, regulate light source.Pass through Y-direction coarse adjustable stage 9 and everything bracket
(fine adjustment stage) 8 is until show high-visible linear cutter slot on computer.Fatigue tester is driven, two displays are observed
The crack propagation situation of module, and record in real time.When showing that crack extending length is different or deflection is larger for two, shut down,
Influence caused by extraneous factor On Crack Propagation is offset by way of compensation.
The utility model structure is simple, easy to use, and precrack is high-quality, high-efficient, can greatly help to test
Personnel obtain standard compliant fracture toughness specimen.
Claims (7)
1. a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device, it is characterised in that: including micro- over long distances
Mirror, the long range electronmicroscopic level are mounted in everything fine adjustment stage, and the everything fine adjustment stage is fixed on shape steel bracket；
Eyepiece end microscopical over long distances is connected with the camera end of CCD camera, object mirror alignment specimen surface microscopical over long distances, examination
Two parallel sides of sample respectively correspond two sets of measuring systems；The signal output end of CCD industrial camera is connected with computer, can be
Imaging and measurement are realized on functional software；
The Fracture of Metal Material toughness specimen crack length on-Line Monitor Device may be implemented long away from inner fracture toughness specimen two
The real-time detection of a face crack.
2. a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device, feature exist according to claim 1
In: the shape steel bracket is placed on firm banking.
3. a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device, feature exist according to claim 1
In: the everything fine adjustment stage is fine positioning platform, is made of everything bracket, can support the fine adjustment on three directions.
4. a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device, feature exist according to claim 1
In: described device includes three-dimensional regulation platform, and the three-dimensional regulation platform includes coarse positioning platform and fine positioning platform, coarse positioning
Platform is made of shape steel bracket connection pedestal, can support to move in the Y direction；Fine positioning platform is made of everything bracket, can
Support the fine adjustment on three directions.
5. a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device according to claim 1, feature
Be: long range microscope is fixed times fixed focus-type, thus avoids many and diverse demarcation flow；Its field range is 4mm, resolution ratio
It is 1 μm.
6. a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device according to claim 1, feature
Be: industrial camera, fixed times camera lens, tight shot, objective lens etc. are linked in sequence in the long range microscope.
7. a kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device according to claim 1, feature
Be: described device includes industrial camera and receiving module, can convert picture signal and be transmitted on computer；Pass through calculating
The measurement of machine is equipped, can be with the length and deflection angle of real-time measurement crackle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920047197.2U CN209606222U (en) | 2019-01-11 | 2019-01-11 | A kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920047197.2U CN209606222U (en) | 2019-01-11 | 2019-01-11 | A kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device |
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| CN209606222U true CN209606222U (en) | 2019-11-08 |
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| CN201920047197.2U Expired - Fee Related CN209606222U (en) | 2019-01-11 | 2019-01-11 | A kind of Fracture of Metal Material toughness specimen crack length on-Line Monitor Device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175158A (en) * | 2020-02-10 | 2020-05-19 | 天津大学 | Open structure corner fatigue and crack propagation measurement sample |
| CN112964583A (en) * | 2021-02-03 | 2021-06-15 | 天津大学 | Method for detecting and representing crack evolution based on electric signal induction fatigue system |
| CN114088515A (en) * | 2021-11-02 | 2022-02-25 | 国家高速列车青岛技术创新中心 | Monocular vision multi-view crack propagation monitoring device |
| CN114544654A (en) * | 2022-03-04 | 2022-05-27 | 北京航空航天大学 | Tiny crack growth in-situ test and observation device |
-
2019
- 2019-01-11 CN CN201920047197.2U patent/CN209606222U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175158A (en) * | 2020-02-10 | 2020-05-19 | 天津大学 | Open structure corner fatigue and crack propagation measurement sample |
| CN112964583A (en) * | 2021-02-03 | 2021-06-15 | 天津大学 | Method for detecting and representing crack evolution based on electric signal induction fatigue system |
| CN114088515A (en) * | 2021-11-02 | 2022-02-25 | 国家高速列车青岛技术创新中心 | Monocular vision multi-view crack propagation monitoring device |
| CN114544654A (en) * | 2022-03-04 | 2022-05-27 | 北京航空航天大学 | Tiny crack growth in-situ test and observation device |
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Granted publication date: 20191108 Termination date: 20210111 |