CN105910742A - Ultrasonic residual stress test surface positioning coupling device - Google Patents
Ultrasonic residual stress test surface positioning coupling device Download PDFInfo
- Publication number
- CN105910742A CN105910742A CN201610510750.2A CN201610510750A CN105910742A CN 105910742 A CN105910742 A CN 105910742A CN 201610510750 A CN201610510750 A CN 201610510750A CN 105910742 A CN105910742 A CN 105910742A
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- China
- Prior art keywords
- residual stress
- stress test
- coupling device
- test surface
- ultrasound wave
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/25—Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, microwaves, neutrons
- G01L1/255—Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, microwaves, neutrons using acoustic waves, or acoustic emission
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses an ultrasonic residual stress test surface positioning coupling device, comprising an organic glass wedge block, a transducer fixing threaded hole, a positioning lens cone, a glue film bag, a water flow pipe and a mini water tank, wherein the organic glass wedge block fixes an ultrasonic transducer or an ultrasonic sending and receiving probe, and the downside of the threaded hole is directly connected with the lower surface of the organic glass wedge block; and the positioning lens cone is positioned in the middle of the glass wedge block, and the glue film bag is in seamless connection with the transducer fixing threaded hole. Compared with the existing ultrasonic residual stress test surface coupling devices, on one hand, the ultrasonic residual stress test surface positioning coupling device disclosed by the invention can quickly, simply and flexibly position a position needing a stress test and ensure that the direction of the stress test is parallel to or perpendicular to the direction of material rolling, and on the other hand, the ultrasonic residual stress test surface positioning coupling device improves the test precision of ultrasonic residual stress, avoids a relatively high cost and a reduced production efficiency due to processing of the organic glass wedge block according to different curvature values, and realizes multiple curvature tests by virtue of a single device.
Description
Technical field
The present invention relates to a kind of ultrasound wave residual stress test surface alignment coupling device, being specifically related to one can be super
Accurately simple location and the few ultrasound wave residual stress test surface alignment coupling of test error during sound wave residual stress test
Locking device.
Background technology
The step of currently used ultrasound wave remnants test is mainly: one, the material needing test is carried out sonoelastic coefficient K
Gather with zero stress calibration block ultrasonic propagation velocity；Two, treat test position to be marked, generally according to required test
Two-dimensional coordinate system is set up in position；Three, the position of required test is carried out daubing coupling agent；Four, ultrasonic wave transducer will be fixed with
The plexiglass block of device is fixed at coordinate to be measured；Five, to needing the coordinate points measured to carry out stress test.
Need during sonoelastic coefficient is demarcated by step one respectively rolling direction parallel to same material and
Vertical rolling direction is demarcated, and ultrasound wave spread speed in zero stress calibration block also will be respectively according to parallel rolling direction
It is acquired with vertical direction.Ultrasound wave is mainly based upon what residual stress was tested by Sound elasticity principle, i.e. utilizes material
Residual stress in the spread speed of middle ultrasound wave and material is linear tests remnants, the spread speed of ultrasound wave
Not only relevant with the stress in test piece, also relevant with the rolling direction of workpiece material.Same ultrasound wave is at zero stress sample
In spread speed be also the basic data of ultrasound wave residual stress, and the spread speed that ultrasound wave is in zero stress sample, also with
The rolling direction with material of sample is relevant.The generally test to material residual stress is divided into parallel rolling direction and the vertical side of rolling
To stress test, if use ultrasound wave carry out residual stress test, location process can not make ultrasound wave in the material
The direction of propagation accurately with material rolling direction and vertical direction, and the basic data sonoelastic coefficient K used and zero stress
Spread speed in sample is to obtain, so that ultrasound wave is remaining according to parallel material rolling direction or vertical material rolling direction
Stress test error is bigger；On the other hand, when the surface of the work of test is relatively rough, and the pipeline etc. with curvature is carried out
During stress test, the lucite voussoir of mounting ultrasonic transducer and the contact surface of test piece cause couple state relatively
Difference, causes ultrasound wave, on the poor interface of coupling, higher decay occurs, makes the resultant error of ultrasound wave residual stress test
Bigger.
Currently used lucite voussoir transparency is not enough, and the lens barrel cross hairs of nothing location is as reference substance, the most only
Ultrasound wave stress test device about can be fixed on the position of required test, rule of thumb adjust lucite voussoir, make to surpass
The direction of sonic propagation is parallel with the direction of test stress, and then causes error bigger.
At present ultrasonic transducer lucite is fixed voussoir and is generally used glycerol or Mel etc. as couplant, and surveys
The surface contact coupling of trial work part, lucite voussoir is higher due to hardness, it is difficult to deformation, higher with roughness and with curvature
Workpiece test surfaces contact time, couple state is poor.
Summary of the invention
For solving the deficiencies in the prior art, the present invention devises a kind of ultrasound wave residual stress test surface alignment coupling dress
Put.
The technical scheme is that a kind of ultrasound wave residual stress test surface alignment coupling device, it is characterized in that, should
Device includes that organic glass wedge block, transducer fix screwed hole, location lens barrel, glued membrane bag, water flow pipes and mini flume, described in have
Machine glass voussoir mounting ultrasonic transducer or ultrasonic transmission/reception probe, below described screwed hole under straight-through lucite voussoir
Surface, location lens barrel is positioned in the middle of glass voussoir, and screwed hole seamless link fixed by glued membrane bag and transducer.
Further, water flow pipes arranges water flow pressure sensor and micro pump, and micro pump is connected with mini flume.
Further, location lens barrel is high transparency lens barrel, and location lens barrel contacts side and is shaped with cross graduation mark with test point.
The present invention is achieved in that glass voussoir plays the effect of mounting ultrasonic transducer, and glass voussoir mid portion arranges fixed
Position lens barrel, location lens barrel is high transparency lens barrel, and the side that high transparency lens barrel contacts with test point is shaped with cross graduation mark, by seeing
Examine location lens barrel and glass voussoir is fixed on the about position of required stress test, adjust organic glass according to the cross hairs in lens barrel
Glass voussoir, makes the centre position of cross hairs and the centre position alignment of test point, and makes the two lines test point respectively of cross hairs
Two lines overlap, reach the purpose being accurately positioned.
Further, before ultrasonic transmission/reception probe is assemblied in transducer screwed hole, below screwed hole, glued membrane bag is not noted
Enter water.If just injecting water before assembling probe, the pipeline of water pump is not closed, and is easily caused current and overflows, and is screwed into transducing
After device, pump tube ensure that closing, it is to avoid current overflow, after ultrasound probe assembling, by regulation regulation micro pump control
Mini flume processed and the water (flow) direction of water flow pipes, when the registration of water flow pressure sensor is identical with demarcating registration, stop adjusting
Micro pump.
Further, glued membrane bag can soft deform, and higher with roughness or with curvature test surfaces can realize
Good coupling, decreases owing to contact surface roughness is big, the impact that the couple state that causes with curvature test surfaces is poor.
Beneficial effects of the present invention: existing ultrasound wave residual stress test surface coupling device is changed by the present invention
Enter, on the one hand, can quickly, simply, flexibly location need the position of stress test, and the direction of proof stress test and material
The direction of material rolling is parallel or vertical；On the other hand, glued membrane band can soft deform, higher with roughness or with curvature
Test surfaces can realize good coupling, decrease owing to contact surface roughness is big, the coupling shape caused with curvature test surfaces
The impact that state is poor, improves the measuring accuracy of ultrasound wave residual stress, avoids simultaneously and processes organic glass according to different curvature value
Higher cost and production efficiency that glass voussoir brings reduce, it is achieved single device can be tested with multiple curvature.
Accompanying drawing explanation
Fig. 1 is invention overall structure schematic diagram；
Fig. 2 is glued membrane bag part-structure schematic top plan view of the present invention；
Fig. 3 is glued membrane bag part-structure left view schematic diagram of the present invention；
Fig. 4 be the present invention to testing of materials time the scattergram of residual stress test point chosen；
Fig. 5 is that the present invention is to positioning schematic diagram during testing of materials.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is done and further explain.
As shown in Figures 1 to 5, the detailed description of the invention of the present invention is to include that screw thread fixed by organic glass wedge block 1, transducer
Hole 2, location lens barrel 3, glued membrane bag 4, water flow pipes 5 and mini flume 8, lucite voussoir 1 mounting ultrasonic transducer or super
Sound wave transmitting-receiving probe, transducer is fixed straight-through lucite voussoir 1 lower surface below screwed hole 2, is positioned lens barrel 3 and be positioned at glass wedge
In the middle of block 1, screwed hole 2 seamless link fixed by glued membrane bag 4 and transducer；Water flow pipes 5 arranges water flow pressure sensor 7 and Miniature water
Pump 7, micro pump 7 is connected with mini flume 8.
Before test, determine according to specific works situation, unique characteristics and the production requirement of workpiece and need to carry out stress test
Position, arrange coordinate points.When the stress of bead direction parallel to test point 1 is tested, according to cross hairs in lens barrel 9
Position adjustments lucite voussoir 1, makes lens barrel cross hairs 9 and the cross hairs center superposition of test point coordinate point, and and coordinate
The intersecting lens of some cross hairs overlaps, by the step for can position accurately and need the coordinate position of stress test, it is ensured that super
The direction of sonic propagation is parallel with the direction of stress test, prevents test point position inaccurate and ultrasonic propagation direction and stress
The direction of test is not parallel and uses Stress Constants K of mistake and zero stress block spread speed to bring bigger error.
Before ultrasound probe is assemblied in transducer screwed hole, below screwed hole, glued membrane bag is not injected into water, if at dress
Just injecting water before joining probe, the pipeline of water pump is not closed, and is easily caused current and overflows, and is screwed into pump tube energy after transducer
Enough guarantee is closed, it is to avoid current overflow, after ultrasound probe assembles, by regulation regulation micro pump control mini flume and
The water (flow) direction of water flow pipes, with specific reference to the display numerical value of water flow pressure sensor 6, regulates micro pump 7, makes mini flume 8
In water enter water flow pipes 5 or make the water in water flow pipes 5 flow out in mini flume 8, when the display of water flow pressure sensor 6
When numerical value is identical with the display numerical value of timing signal, stopping regulation micro pump 7, now glued membrane bag 4 and test surfaces reach and mark
The most consistent coupling pressure, such that it is able to avoid due to test and the inconsistent coupling error brought of timing signal coupling pressure,
Improve measuring accuracy.
If the surface of the work of test is the plane that roughness is higher, or the surface of test piece is with certain song
Rate, glued membrane bag 4 can soft deform, makes glued membrane bag 4 and test surfaces good coupling, can the soft glued membrane bag 4 deformed to song
The test such as the pipeline of rate can be with good coupling, it is to avoid process, according to different curvature value, the higher cost that organic glass wedge block brings
Reduce with production efficiency, it is achieved single device can be tested with multiple curvature.
The using effect of the present invention can be verified by tests below and illustrate:
Choosing bullet train Aluminium Alloys in Common Use materials A 7N01S-T5,700*230 docks test plate (panel), arranges remnants according to same distance
Stress test point.Do not use the track ultrasound wave residual stress test surface alignment coupling device of the present invention, hand-held stable fixing
Ultrasound probe, directly tests test point 1-10 point residual stress, and test result see table.
Method described above installs ultrasound wave residual stress test surface alignment coupling device, by supersonic generator with super
Sonic test system connects, and 1-10 point is carried out residual stress test, and the result of test see table.
The residual stress test result of employing the design is relative to weld seam both sides almost symmetry, and is provided without the design device
Remaining test result is poor relative to the symmetry of weld seam both sides, uses the design device to can ensure that test process coupling pressure
Concordance and with the concordance of timing signal coupling pressure, simultaneously it is also ensured that the stress direction of test is normal with the stress of demarcation
The concordance of ultrasonic propagation time under number and zero stress state, thus avoid test mode and couple state discordance, survey
Examination direction and fixed setting discordance, and the ultrasound wave stress test that in test process, couple state diversity causes is by mistake
Difference, from the basic feature of welding residual stress, the residual stress of weld seam lateral symmetry position also has preferable symmetry,
So the stress result using ultrasound wave residual stress test surface alignment coupling device to test is relatively reliable.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
1. a ultrasound wave residual stress test surface alignment coupling device, is characterized in that, this device include organic glass wedge block,
Transducer fixes screwed hole, location lens barrel, glued membrane bag, water flow pipes and mini flume, described lucite voussoir mounting ultrasonic
Transducer or ultrasonic transmission/reception probe, straight-through lucite voussoir lower surface below described screwed hole, location lens barrel is positioned at glass
In the middle of glass voussoir, screwed hole seamless link fixed by glued membrane bag and transducer.
A kind of ultrasound wave residual stress test surface alignment coupling device the most according to claim 1, is characterized in that, current
Pipe arranges water flow pressure sensor and micro pump, and micro pump is connected with mini flume.
A kind of ultrasound wave residual stress test surface alignment coupling device the most according to claim 1, is characterized in that, location
Lens barrel is high transparency lens barrel, and location lens barrel contacts side and is shaped with cross graduation mark with test point.
A kind of ultrasound wave residual stress test surface alignment coupling device the most according to claim 1, is characterized in that, will be super
Before sound wave transmitting-receiving probe is assemblied in transducer screwed hole, below screwed hole, glued membrane bag is not injected into water.
A kind of ultrasound wave residual stress test surface alignment coupling device the most according to claim 2, is characterized in that, adjust
Micro pump can control the water (flow) direction of mini flume and water flow pipes, when registration and the demarcation registration phase of water flow pressure sensor
Stop adjusting micro pump simultaneously.
A kind of ultrasound wave residual stress test surface alignment coupling device the most according to claim 1, is characterized in that, glued membrane
Bag can soft deform.
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|---|---|---|---|
| CN201610510750.2A CN105910742B (en) | 2016-07-01 | 2016-07-01 | A kind of ultrasonic wave residual stress test surface positions coupling device |
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|---|---|---|---|
| CN201610510750.2A CN105910742B (en) | 2016-07-01 | 2016-07-01 | A kind of ultrasonic wave residual stress test surface positions coupling device |
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| CN105910742A true CN105910742A (en) | 2016-08-31 |
| CN105910742B CN105910742B (en) | 2019-05-21 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645432A (en) * | 2016-12-28 | 2017-05-10 | 中国水利水电科学研究院 | Auto-coupling acoustic wave test system and acoustic wave test method |
| CN106679872A (en) * | 2017-01-25 | 2017-05-17 | 大连理工大学 | Surface residual stress ultrasonic detection method capable of achieving direct coupling wave generation |
| CN108088915A (en) * | 2017-10-31 | 2018-05-29 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | A kind of non-destructive ultrasonic detects voussoir |
| CN108709933A (en) * | 2018-05-17 | 2018-10-26 | 马飞虎 | A kind of non-destructive detecting device for metal material production |
| CN109959477A (en) * | 2019-03-29 | 2019-07-02 | 华南理工大学 | A kind of GIS disc insulator epoxy test block internal stress ultrasonic longitudinal wave detection method and system |
| CN111678629A (en) * | 2020-06-05 | 2020-09-18 | 北京理工大学 | Ultrasonic monitoring probe for internal service stress of ocean structural member |
| CN111811708A (en) * | 2020-07-23 | 2020-10-23 | 北京理工大学 | Mechanical component ultrasonic testing device and method based on magnetic fluid coupling |
| CN111811707A (en) * | 2020-07-23 | 2020-10-23 | 北京理工大学 | Rotating member ultrasonic testing device and method based on magnetic fluid coupling |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100162817A1 (en) * | 2008-12-26 | 2010-07-01 | Nobuo Hara | Ultrasonic stress measurement method and device |
| CN102889955A (en) * | 2012-10-10 | 2013-01-23 | 北京理工大学 | Simple clamping device for ultrasonic inspection of residual stress of steel rail |
| CN103323535A (en) * | 2012-03-20 | 2013-09-25 | 北京理工大学 | Ultrasonic detection device for residual stress on near surface of hole or cavity |
| CN103616102A (en) * | 2013-12-09 | 2014-03-05 | 北京理工大学 | Ultrasound leakage longitudinal wave sensing device for detecting residual stress distribution of sheet metal |
| CN104931167A (en) * | 2015-07-08 | 2015-09-23 | 四川广正科技有限公司 | Fixed line feed apparatus of ultrasonic probe in ultrasonic wave stress measurement system |
| CN105300578A (en) * | 2015-11-20 | 2016-02-03 | 西南交通大学 | Ultrasonic-wave stress detection device capable of adjusting acoustic beam angle and test area |
-
2016
- 2016-07-01 CN CN201610510750.2A patent/CN105910742B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100162817A1 (en) * | 2008-12-26 | 2010-07-01 | Nobuo Hara | Ultrasonic stress measurement method and device |
| CN103323535A (en) * | 2012-03-20 | 2013-09-25 | 北京理工大学 | Ultrasonic detection device for residual stress on near surface of hole or cavity |
| CN102889955A (en) * | 2012-10-10 | 2013-01-23 | 北京理工大学 | Simple clamping device for ultrasonic inspection of residual stress of steel rail |
| CN103616102A (en) * | 2013-12-09 | 2014-03-05 | 北京理工大学 | Ultrasound leakage longitudinal wave sensing device for detecting residual stress distribution of sheet metal |
| CN104931167A (en) * | 2015-07-08 | 2015-09-23 | 四川广正科技有限公司 | Fixed line feed apparatus of ultrasonic probe in ultrasonic wave stress measurement system |
| CN105300578A (en) * | 2015-11-20 | 2016-02-03 | 西南交通大学 | Ultrasonic-wave stress detection device capable of adjusting acoustic beam angle and test area |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645432A (en) * | 2016-12-28 | 2017-05-10 | 中国水利水电科学研究院 | Auto-coupling acoustic wave test system and acoustic wave test method |
| CN106679872A (en) * | 2017-01-25 | 2017-05-17 | 大连理工大学 | Surface residual stress ultrasonic detection method capable of achieving direct coupling wave generation |
| CN106679872B (en) * | 2017-01-25 | 2019-04-23 | 大连理工大学 | A kind of straight coupling makes the surface residual stress supersonic detection method of wave |
| CN108088915A (en) * | 2017-10-31 | 2018-05-29 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | A kind of non-destructive ultrasonic detects voussoir |
| CN108709933A (en) * | 2018-05-17 | 2018-10-26 | 马飞虎 | A kind of non-destructive detecting device for metal material production |
| CN109959477A (en) * | 2019-03-29 | 2019-07-02 | 华南理工大学 | A kind of GIS disc insulator epoxy test block internal stress ultrasonic longitudinal wave detection method and system |
| CN111678629A (en) * | 2020-06-05 | 2020-09-18 | 北京理工大学 | Ultrasonic monitoring probe for internal service stress of ocean structural member |
| CN111678629B (en) * | 2020-06-05 | 2021-10-22 | 北京理工大学 | Ultrasonic monitoring probe for internal service stress of ocean structural member |
| US11604172B2 (en) | 2020-06-05 | 2023-03-14 | Beijing Institute Of Technology | Ultrasonic monitoring probe for internal service stress of a marine structural component |
| CN111811708A (en) * | 2020-07-23 | 2020-10-23 | 北京理工大学 | Mechanical component ultrasonic testing device and method based on magnetic fluid coupling |
| CN111811707A (en) * | 2020-07-23 | 2020-10-23 | 北京理工大学 | Rotating member ultrasonic testing device and method based on magnetic fluid coupling |
| US11680858B2 (en) | 2020-07-23 | 2023-06-20 | Bejing Institute Of Technology | Device and method for ultrasonic detecting of rotating member based on magnetic fluid coupling |
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