CN109507302A - Measure the test block of comparison reflector and method compared with light sheet weld defect - Google Patents
Measure the test block of comparison reflector and method compared with light sheet weld defect Download PDFInfo
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- 238000010276 construction Methods 0.000 abstract description 6
- 238000004021 metal welding Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
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- G01N2291/015—Attenuation, scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
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- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
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- G—PHYSICS
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- G01N2291/056—Angular incidence, angular propagation
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/267—Welds
- G01N2291/2675—Seam, butt welding
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Abstract
The invention belongs to construction steel structure and metal welding techniques fields, the test block of comparison reflector and method more particularly to measurement compared with light sheet weld defect, the thickness of test block ontology is identical as the thickness of detected weld seam base material, the thickness t of test block ontology is 4~10mm, and the width of test block ontology is greater than 2 times of angle probe width；The first circular hole, the second circular hole and the first slot are offered on test block ontology, and third circular hole and the second slot, the central axis of the second circular hole and the central axis of third the circular hole distance between the projection on the first face of test block ontology or the second face meet the echo-ranging of angle probe at least secondary counter ejected wave；Sound wave multiple reflections that comparison reflector test block through the invention can be such that angle probe issues, and then measure the defect of weld seam, it is easy to operate, can accurate detection go out the defect that surface has the measured surface commissure of foreign matter for being not easy to exclude.
Description
Technical field
The invention belongs to construction steel structure and metal welding techniques fields, and in particular to measurement is compared with light sheet weld defect
Compare reflector test block and method.
Background technique
The method that construction steel structure weld seam supersonic detection uses more at present is direct scan or single bounce technique.Make weld seam
The test block that the distance of ultrasonic examination-amplitude curve uses is to be used in direct wave method.Construction steel structure site welding ultrasound
Detection, is often limited by execution conditions, direct scan or single bounce technique cannot check weldquality comprehensively.For example, test surface has
Stop not easy-clear；One test surface casting concrete, only one test surface is for checking weldquality；Test surface cannot
It is processed smooth, causing " direct scan and single bounce technique " back wave, in the case where same sound path, backward energy has biggish
Error, " distance-amplitude curve " that direct wave legal system makees weld seam supersonic detection can not adapt to single bounce technique supersonic welding
Seam flaw detection, less adapts to multiple echo method.
Summary of the invention
To solve problems of the prior art, the purpose of the present invention is to provide measurements compared with light sheet weld defect
Compare reflector test block and method.
The technical solution adopted by the invention is as follows:
The comparison reflector test block compared with light sheet weld defect, including test block ontology are measured, test block ontology is cuboid, examination
The thickness of block body is identical as the thickness of detected weld seam base material, and the thickness t of test block ontology is 4~10mm, the width of test block ontology
Degree is greater than 2 times of angle probe width；
The first slot is offered in the middle part of test block ontology bottom surface, offers the second slot on the bottom surface of test block ontology right end,
The cross sectional shape of first slot and the second slot is square, the width direction of the first slot and the second slot along test block ontology
It opens up；
Test block ontology successively offers the first circular hole and the second circular hole, the first circular hole in the top of the first slot from top to bottom
Width direction with the second circular hole along test block ontology opens up；
The central axis of first circular hole, the central axis of the second circular hole and test block ontology bottom surface are in the first slot open side
Line is in same plane F, and the angle β between plane F and bottom surface meets following relationship:
β >=α, and β ≠ 90 °；
Wherein, α is the ultrasonic wave incidence angle that angle probe emits in test block ontology, which is the ultrasound of angle probe transmitting
The angle of wave and test block body thickness direction；
Test block ontology offers third circular hole above the second slot, and third circular hole is opened along the width direction of test block ontology
If；
First circular hole, the second circular hole are identical with third circular hole aperture, the distance between the first slot and the second slot axis
Meet the echo-ranging of angle probe at least secondary counter ejected wave, the first circular hole, the second circular hole and the first slot are respectively to test block ontology
In the distance of left side, shortest distance meets the echo-ranging of angle probe at least secondary counter ejected wave.
The central axis of first circular hole, the second circular hole and third circular hole is not at the sustained height in test block body thickness direction,
The hole height of first slot and the second slot is not identical.
The roughness of test block ontology is identical as the roughness of detected weld seam base material.
The aperture A of first circular hole, the second circular hole and third circular hole is 1~3mm；The hole of first slot and the second slot is high
For 1~2mm；
Clear distance between first circular hole and the second circular hole is (5t/12A)/sin β-A, and the second circular hole and the first slot are open
Clear distance between face is (t/3)/sin β-A/2.
When third circular hole is in the surface of the second slot, the clear distance between third circular hole and the second slot is 4t/5-
The hole of the second slot of A/2- is high.
Comparison reflector test block of the measurement compared with light sheet weld defect is pair for detecting strip defect in weld seam
When than reflector test block:
First circular hole, the second circular hole and third circular hole run through test block ontology along the width direction of test block ontology；First slot
Run through the bottom surface of test block ontology along the width direction of test block ontology with the second slot.
Comparison reflector test block of the measurement compared with light sheet weld defect is the comparison for detecting weld seam spot defect
When reflector test block, in the open end of the first circular hole, the second circular hole third circular hole, the first slot and the second slot on test block ontology
Arc-shaped groove is offered, the open end of the first circular hole, the second circular hole and three circular holes is respectively positioned on corresponding arc-shaped groove circular arc
The open end of the top in face, the second circular hole and the first slot is located on the arc surface of same arc-shaped groove, arc-shaped groove
Diameter is 10~30mm；
The blind hole of first circular hole, the second circular hole and third circular hole along the width direction of test block ontology；First slot and second
Slot does not run through the bottom surface of test block ontology along the width direction of test block ontology；The depth of first circular hole, the second circular hole and third circular hole
Degree is 3~6mm.
The method compared with light sheet weld defect is measured, the comparison reflector by said determination compared with light sheet weld defect tries
Block carries out, and process is as follows:
Angle probe is placed on to the top surface or bottom surface of test block ontology, angle probe to the tilted transmitting ultrasonic wave of test block ontology,
The ultrasonic wave that angle probe is launched roundtrip can move ahead between the bottom surface and top surface of test block ontology；
Adjust angle probe position, make angle probe emit ultrasonic wave reached after reflecting at least twice the first circular hole,
Second circular hole, third circular hole, the first slot and the second slot；
Distance-wave amplitude of hole depth is made according to the back wave echo dB value of the first circular hole, the second circular hole and third circular hole
Curve；
Slot hole height-amplitude curve is made according to the back wave echo dB value of the first slot and the second slot；
Weld defect is analyzed by distance-amplitude curve and slot hole height-amplitude curve.
The top of plane F is tilted towards the left end of test block ontology, when angle probe is placed on the top surface of test block ontology, angle probe
When the ultrasonic wave of transmitting reaches the second circular hole after reflecting at least twice, angle probe is located at the right side of the second circular hole, visits when oblique
Head is placed on the bottom surface of test block ontology, when the ultrasonic wave of angle probe transmitting reaches the second circular hole after reflecting at least twice, tiltedly
Probe is located at the left side of the second circular hole；
When angle probe is placed on the top surface of test block ontology, the ultrasonic wave of angle probe transmitting reaches after reflecting at least twice
When the first circular hole, angle probe is located at the left side of the first circular hole, when angle probe is placed on the bottom surface of test block ontology, angle probe transmitting
When ultrasonic wave reaches the first circular hole after reflecting at least twice, angle probe is located at the right side of the first circular hole.
When the roughness of test block ontology and the roughness difference of weld seam base material ,-amplitude curve figure amendment of adjusting the distance.
Compared with prior art, the present invention has following beneficial features:
The present invention measures the thickness of the test block ontology of the comparison reflector test block compared with light sheet weld defect and detects weldering
The thickness for stitching base material is identical；The first slot is offered in the middle part of test block ontology bottom surface, is offered on the bottom surface of test block ontology right end
The cross sectional shape of second slot, the first slot and the second slot is square, and the first slot and the second slot are along test block ontology
Width direction open up, the first slot and the second slot are slot reflector, for detecting root of weld defect；Test block ontology
The first circular hole and the second circular hole are successively offered from top to bottom in the top of the first slot, and the first circular hole and the second circular hole are along test block
The width direction of ontology opens up；Test block ontology offers third circular hole above the second slot, and third circular hole is along test block ontology
Width direction open up；First circular hole, the second circular hole and third circular hole are circular hole reflector, for detecting defect in the middle part of weld seam；
First circular hole, the second circular hole are identical with third circular hole aperture, and the distance between the first slot and the second slot axis, which meet, tiltedly to be visited
The echo-ranging of head at least secondary counter ejected wave, the first circular hole, the second circular hole and the first slot are respectively to test block ontology left side
In distance, shortest distance meets the echo-ranging of angle probe at least secondary counter ejected wave, the central axis of the first circular hole, the second circular hole
Central axis and test block ontology bottom surface in the middle line of the first slot open side be in same plane F, it is smaller in order to detect thickness
Plate, the thickness t of test block ontology of the present invention is 4~10mm, and thickness is smaller, it is therefore desirable to the angle β between plane F and bottom surface
Meet β >=α, and the condition of β ≠ 90 °, to guarantee that the ultrasonic wave of angle probe transmitting reaches the first circle after reflecting at least twice
When hole, the second circular hole, third circular hole, the first slot and the second slot, the first circular hole, the second circular hole, third circular hole, the first slot
It is not interfered with each other between hole and the second slot；Wherein, α is the ultrasonic wave incidence angle that angle probe emits in test block ontology, this enters
Firing angle is the ultrasonic wave of angle probe transmitting and the angle in test block body thickness direction；When use measurement of the invention is welded compared with light sheet
When the comparison reflector test block of seam defect measures weld defect, angle probe is placed on to the top surface or bottom surface of test block ontology, is tiltedly visited
Head to the tilted transmitting ultrasonic wave of test block ontology, the ultrasonic wave that angle probe is launched can the bottom surface of test block ontology and top surface it
Between roundtrip move ahead；The position for adjusting angle probe, the ultrasonic wave for emitting angle probe reach the after reflecting at least twice
One circular hole, the second circular hole, third circular hole, the first slot and the second slot；According to the first circular hole, the second circular hole and third circular hole
Back wave echo dB value production hole depth distance-amplitude curve；According to the back wave echo of the first slot and the second slot
DB value makes slot hole height-amplitude curve；By distance-amplitude curve and slot hole height-amplitude curve come to weld defect
It is analyzed.It can be seen that when comparison reflector test block through the invention detects weld defect, ultrasound that angle probe is launched
Wave passes through multiple reflections, and progress path is broken line, therefore when test surface has blocking that should not remove, comparison through the invention is anti-
The foreign matter that beam test block can not be not easy to exclude by measured surface is influenced, and accurately detects the defect of commissure, solves
Problems of the prior art.
Beneficial effect by aforementioned present invention measurement compared with the comparison reflector test block of light sheet weld defect is it is found that the present invention
Method solve following technical problem: in actual field detection process, using direct wave or primary reflection method, weld seam detection
Face must clear up polishing, however field condition, some test surfaces are not easy complete liquidation polishing processing.Using of the invention multiple anti-
Ejected wave carrying out flaw detection can be improved the property examined of detection working efficiency and this kind of seam inspection；Simultaneously solve plate thickness compared with
Hour, the ultrasonic wave of angle probe transmitting reaches the first circular hole, the second circular hole, third circular hole, first after reflecting at least twice
It is mutually dry between the first circular hole, the second circular hole, third circular hole, the first slot and the second slot when slot and the second slot
The problem of disturbing.In conclusion measurement of the invention is easy to operate compared with the method for light sheet weld defect, can accurate detection go out
Surface has the defect of the measured surface commissure for the foreign matter for being not easy to exclude.
Detailed description of the invention
The definition schematic diagram in each face of test block ontology of the present invention Fig. 1；
Fig. 2 is the strip defects detection comparison reflector structure schematic diagram of one embodiment of the invention；
Fig. 3 is the structural schematic diagram of the first circular hole in Fig. 2, the second circular hole and the first slot position；
Fig. 4 is the structural schematic diagram of right end in Fig. 2；
Fig. 5 is the top view of embodiment illustrated in fig. 2；
Fig. 6 is the axonometric drawing of embodiment illustrated in fig. 2；
Fig. 7 is the spot defect detection comparison reflector structure schematic diagram of another embodiment of the present invention；
Fig. 8 is the structural schematic diagram of the first circular hole, the second circular hole and the first slot position in Fig. 7；
Fig. 9 is the structural schematic diagram of right end in Fig. 7；
Figure 10 is the top view of Fig. 7；
Figure 11 is the axonometric drawing of embodiment illustrated in fig. 7；
Figure 12 is the 5P6X6K2 secondary reflection pitch of waves from-amplitude curve (use of strip Defect detection)；
Figure 13 is 5P6X6K2 secondary reflection wave hole height-amplitude curve (flaw detection of strip root defect uses)；
Figure 14 is application example schematic diagram of the present invention.
In figure, 1- test block ontology, 2- angle probe, the first circular hole of 3-, the second circular hole of 4-, the first slot of 5-, 6- third circular hole,
The second slot of 7-, 8- arc-shaped groove, 9- steel column, 10- weld seam, 11- concrete slab, 12- flange plate, 13- girder steel, 14- is not
The foreign matter easily excluded.
Specific embodiment
It is next with reference to the accompanying drawings and examples that the present invention is further illustrated.
The comparison reflector test block of measurement of the invention compared with light sheet weld defect, including test block ontology 1, test block ontology 1
For cuboid, referring to Fig.1, the first face 1-1 and the second face 1-2 of test block ontology 1 are one group pair of 1 thickness direction of test block ontology
Face, the third face 1-3 and fourth face 1-4 of test block ontology 1 are one group of opposite of 1 width direction of test block ontology, the of test block ontology 1
Five face 1-5 and the 6th face 1-6 are one group of opposite of 1 length direction of test block ontology；The thickness of test block ontology 1 and detected weld seam are female
The thickness of material is identical, and the thickness t of test block ontology 1 is 4~10mm, and the width of test block ontology 1 is greater than 2 times of 2 width of angle probe；Ginseng
According to Fig. 2~Figure 11, the first slot 5, the bottom of 1 right end of test block ontology are offered in the middle part of 1 bottom surface of test block ontology (i.e. the second face 1-2)
Offer the second slot 7 on face, the cross sectional shape of the first slot 5 and the second slot 7 is square, the first slot 5 and second
Slot 7 is opened up along the width direction of test block ontology 1；Test block ontology 1 successively offers in the top of the first slot 5 from top to bottom
One circular hole 3 and the second circular hole 4, the first circular hole 3 and the second circular hole 4 are opened up along the width direction of test block ontology 1；First circular hole 3
Central axis, the central axis of the second circular hole 4 and 1 bottom surface of test block ontology are in same plane in the middle line of 5 open side of the first slot
F, the angle β between plane F and bottom surface meet following relationship:
β >=α, and β ≠ 90 °；
Wherein, α is the ultrasonic wave incidence angle that angle probe 2 emits in test block ontology 1, which is what angle probe 2 emitted
The angle of ultrasonic wave and 1 thickness direction of test block ontology；
Test block ontology 1 offers third circular hole 6, width of the third circular hole 6 along test block ontology 1 in the top of the second slot 7
Direction opens up；
First circular hole 3, the second circular hole 4 are identical with 6 aperture of third circular hole, between 7 axis of the first slot 5 and the second slot
Distance L1 meets the echo-ranging of at least secondary counter ejected wave of angle probe 2, the first circular hole 3, the second circular hole 4 and the first slot 5 difference
Into the distance of 1 left side of test block ontology, shortest distance L2 meets the echo-ranging of at least secondary counter ejected wave of angle probe 2.
As shown in Fig. 1~Fig. 6, the comparison reflector for the measurement of one embodiment of the invention compared with light sheet weld defect tries
Block, comparison reflector test block of the measurement compared with light sheet weld defect are the comparison reflector for detecting strip defect in weld seam
Test block, at this point, the first circular hole 3, the second circular hole 4 and third circular hole 6 run through test block ontology 1 along the width direction of test block ontology 1；The
One slot 5 and the second slot 7 run through the bottom surface of test block ontology 1 along the width direction of test block ontology 1.
It is the comparison reflector of the measurement compared with light sheet weld defect of another embodiment of the present invention as shown in Fig. 7~Figure 11
Test block, comparison reflector test block of the measurement compared with light sheet weld defect are the comparison reflector for detecting weld seam spot defect
Test block, at this point, opening in the first circular hole 3, the second circular hole 4, third circular hole 6, the first slot 5 and the second slot 7 on test block ontology 1
Mouth end offers arc-shaped groove 8, and the open end of the first circular hole 3, the second circular hole 4 and three circular holes 6 is respectively positioned on corresponding arc-shaped
The open end of the top of 8 arc surface of groove, the second circular hole 4 and the first slot 5 is located on the arc surface of same arc-shaped groove, circle
The diameter of arcuation groove 8 is 10~30mm；The width direction of first circular hole 3, the second circular hole 4 and third circular hole 6 along test block ontology 1
Blind hole；First slot 5 and the second slot 7 do not run through the bottom surface of test block ontology 1 along the width direction of test block ontology 1；First circle
The depth in hole 3, the second circular hole 4 and third circular hole 6 is 3~6mm.
As the above-mentioned two embodiment preferred embodiment of the present invention, the first circular hole 3, the second circular hole 4 and third circular hole 6
Central axis be not at the sustained height of 1 thickness direction of test block ontology, the hole height of the first slot 5 and the second slot 7 is not identical.
As the above-mentioned two embodiment preferred embodiment of the present invention, the roughness of test block ontology 1 and detected weld seam
The roughness of base material is identical.
As the above-mentioned two embodiment preferred embodiment of the present invention, the first circular hole 3, the second circular hole 4 and third circle
The aperture A in hole 6 is 1~3mm；A height of 1~the 2mm in hole of first slot 5 and the second slot 7；First circular hole 3 and the second circular hole 4 it
Between clear distance be (5t/12)/sin β-A, the clear distance between 5 opening face of the second circular hole 4 and the first slot is (t/3)/sin β-
A/2.When third circular hole 6 is in the surface of the second slot 7, the clear distance between third circular hole 6 and the second slot 7 is 4t/5-
The hole of the second slot of A/2- 7 is high.
The method of measurement of the invention compared with light sheet weld defect, pair by above-mentioned measurement compared with light sheet weld defect
It is carried out than reflector test block, process is as follows:
Angle probe 2 is placed on to the top surface or bottom surface of test block ontology 1, angle probe 2 is ultrasonic to the tilted transmitting of test block ontology 1
Wave, the ultrasonic wave that angle probe 2 is launched roundtrip can move ahead between the bottom surface and top surface of test block ontology 1；
The position for adjusting angle probe 2, the ultrasonic wave for emitting angle probe 2 reach the first circular hole after reflecting at least twice
3, the second circular hole 4, third circular hole 6, the first slot 5 and the second slot 7；
Distance-wave of hole depth is made according to the back wave echo dB value of the first circular hole 3, the second circular hole 4 and third circular hole 6
Width curve；
Slot hole height-amplitude curve is made according to the back wave echo dB value of the first slot 5 and the second slot 7；
Weld defect is analyzed by distance-amplitude curve and slot hole height-amplitude curve.
As the preferred embodiment of the invention, referring to Fig. 2, Fig. 3, Fig. 5, Fig. 7, Fig. 8, Figure 10 and Figure 11, plane F's is upper
Portion is tilted towards the left end of test block ontology 1, when angle probe 2 is placed on the top surface of test block ontology 1, the ultrasonic wave that angle probe 2 emits
When reaching the second circular hole 4 after reflecting at least twice, angle probe 2 is located at the right side of the second circular hole 4；When angle probe 2 is placed on
The bottom surface of test block ontology 1, when the ultrasonic wave that angle probe 2 emits reaches the second circular hole 4 after reflecting at least twice, angle probe 2
Positioned at the left side of the second circular hole 4；
When angle probe 2 is placed on the top surface of test block ontology 1, the ultrasonic wave that angle probe 2 emits after reflecting at least twice
When reaching the first circular hole 3, angle probe 2 is located at the left side of the first circular hole 3；When angle probe 2 is placed on the bottom surface of test block ontology 1, tiltedly
When the ultrasonic wave of 2 transmitting of probe reaches the first circular hole 3 after reflecting at least twice, angle probe 2 is located at the right side of the first circular hole 3
Side.
As the preferred embodiment of the invention, when the roughness of test block ontology 1 and the roughness difference of weld seam base material,
Adjust the distance-amplitude curve figure amendment.
Embodiment
The measurement of the present embodiment is as follows compared with the application method of the comparison reflector test block of light sheet weld defect:
In the present embodiment, measures the comparison reflector test block compared with light sheet weld defect and lacked for detecting strip in weld seam
It falls into.Testing hole depth respectively with multiple reflection is the anti-of (1/5) t, (1/4) t, (1/3) t, (2/3) t, (3/4) t and (4/5) t
Distance-amplitude curve of ejected wave echo dB value production hole depth.The roughness of comparison reflector test block is coarse with weld seam steel plate
It spends identical, can be corrected without distance-amplitude curve figure, in the present embodiment, top surface, bottom surface and the weld seam steel plate of test block ontology 1
Roughness it is identical.Wherein, the back wave time that hole depth is (1/5) t, (1/4) t and (2/3) t is tested respectively with multiple reflection
When wave dB value, angle probe 2 is placed on the top surface (i.e. the first face 1-1) of test block ontology 1 and is in the right side of the second circular hole 4, the
The location of two circular holes 4 and the difference of third circular hole 6 are that hole depth is (2/3) t and (1/5) t；Angle probe 2 is placed on test block
The top surface (i.e. the first face 1-1) of ontology 1 and the left side for being in the first circular hole 3, the location of first circular hole 3 are for hole depth
(1/4)t；
Angle probe 2 is placed on the bottom surface (i.e. the second face 1-2) of test block ontology 1 and is in the right side of the second circular hole 4, first
The location of circular hole 3 and the difference of third circular hole 6 are that hole depth is (3/4) t and (4/5) t；Angle probe 2 is placed on test block sheet
The bottom surface (i.e. the second face 1-2) of body 1 and the left side for being in the first circular hole 3, the location of second circular hole 4 are that hole depth is (1/
3)t。
By taking 5P6X6K2 pops one's head in as an example, as shown in Figure 2 to 4, secondary counter ejected wave carries out 10mm thickness, material Q345 steel plate pair
Defect detection in welding seam, the angle β between plane F and bottom surface meet β=tg-12.Compare the size of reflector test block are as follows: long L
=200mm, thickness t=10mm, width H=30mm, comparison reflection body aperture are 3mm (i.e. the first circular hole 3, the second circular hole 4 and the
The diameter of three circular holes 6 is 3mm)；The width of first slot 5 is 1mm, is highly 1mm；The width of second slot 7 is 2mm, height
For 2mm；Distance L1 is 130mm, the distance of the first circular hole 3 to 1 left side of test block ontology between first slot 5 and the second slot 7
L2 is 130mm；Comparison reflector test block is made with welding base metal steel plate.5P6X6K2 secondary counter ejected wave is tested with a thickness of 10mm
Comparison reflector test block in 3 hole Φ Echo Rating such as table 1, press JG/T203-2007, A grades of detections production distance-amplitude curves
As shown in figure 12.Weld joint ultrasonic detection is carried out with this curve.The 5P6X6K2 secondary counter ejected wave such as table 2 of slot, the hole of slot
Height-amplitude curve is as shown in figure 13.
Table 1
Table 2
| Slot/mm | 2X2 | 1X1 |
| dB | 21 | 15 |
It can be seen from table 1 and Figure 12 through the invention multiple echo method production distance-amplitude curve (DAC) with
Sound path track when using ultrasonic wave sound path and detection weld seam is essentially identical, and the defect wave amplitude detected is directly and normal pitch
It is comparable from wave amplitude on-amplitude curve, therefore the present invention can be avoided detection ultrasonic reflections backward energy and direct projection
Wave makes the difference of distance-amplitude curve (DAC) energy, improves the accuracy of weld seam detection flaw echo energy spectrometer.It presses
Relevant agreement or standard, detection weld seam in the middle part of defect, when the corresponding reflection wave amplitude of depth of defect be more than sentence in Figure 12 scrap wire and with
On, it is necessary to it reprocesses；When the corresponding reflection wave amplitude of depth of defect is being sentenced between scrap wire and quantitative line, allow more than agreement or standard
Length, it is necessary to reprocess.When the corresponding reflection wave amplitude of depth of defect evaluation line once, allow to exist.By relevant agreement, detection weldering
Root defect is stitched, defect reflection wave amplitude is more than that Figure 13 straight line or more must be reprocessed, and the defect no more than Figure 13 straight line allows to exist.
As shown in figure 14, by taking certain engineering as an example, H profile steel beam and steel column 9 are welded, and the factor of construction causes seam inspection to examine
When survey, test surface is restricted, at this time can only detection method as shown in Figure 10 detected, reflected using comparison of the invention
Body test block and method, ultrasonic wave multiple echo method on-site test find there is the permissible value that is above standard in the weld seam of many places,
Inform that construction personnel reprocesses.Good effect is achieved to the quality control of the engineering using the invention.
Claims (10)
1. measuring the comparison reflector test block compared with light sheet weld defect, which is characterized in that including test block ontology (1), test block sheet
Body (1) is cuboid, and the thickness of test block ontology (1) is identical as the thickness of detected weld seam base material, the thickness t of test block ontology (1)
For 4~10mm, the width of test block ontology (1) is greater than 2 times of angle probe (2) width；
It is offered the first slot (5) in the middle part of test block ontology (1) bottom surface, offers second on the bottom surface of test block ontology (1) right end
The cross sectional shape of slot (7), the first slot (5) and the second slot (7) is square, the first slot (5) and the second slot (7)
Width direction along test block ontology (1) opens up；
Test block ontology (1) successively offers the first circular hole (3) and the second circular hole (4) in the top of the first slot (5) from top to bottom,
First circular hole (3) and the second circular hole (4) are opened up along the width direction of test block ontology (1)；
The central axis of first circular hole (3), the central axis of the second circular hole (4) and test block ontology (1) bottom surface are opened in the first slot (5)
The middle line of mouth side is in same plane F, and the angle β between plane F and bottom surface meets following relationship:
β >=α, and β ≠ 90 °；
Wherein, α is the ultrasonic wave incidence angle that angle probe (2) emit in test block ontology (1), which is angle probe (2) transmitting
Ultrasonic wave and test block ontology (1) thickness direction angle；
Test block ontology (1) offers third circular hole (6) above the second slot (7), and third circular hole (6) is along test block ontology (1)
Width direction open up；
First circular hole (3), the second circular hole (4) are identical with third circular hole (6) aperture, the first slot (5) and the second slot (7) axis
The distance between meet the echo-ranging of angle probe (2) at least secondary counter ejected wave, the first circular hole (3), the second circular hole (4) and first
For slot (5) respectively into the distance of test block ontology (1) left side, shortest distance meets angle probe (2) at least secondary counter ejected wave
Echo-ranging.
2. measurement according to claim 1 is compared with the comparison reflector test block of light sheet weld defect, which is characterized in that first
The central axis of circular hole (3), the second circular hole (4) and third circular hole (6) is not at the sustained height of test block ontology (1) thickness direction,
The hole height of first slot (5) and the second slot (7) is not identical.
3. measurement according to claim 1 is compared with the comparison reflector test block of light sheet weld defect, which is characterized in that test block
The roughness of ontology (1) is identical as the roughness of detected weld seam base material.
4. measurement according to claim 1 is compared with the comparison reflector test block of light sheet weld defect, which is characterized in that first
The aperture A of circular hole (3), the second circular hole (4) and third circular hole (6) is 1~3mm；First slot (5) and the second slot (7)
A height of 1~the 2mm in hole；
Clear distance between first circular hole (3) and the second circular hole (4) is (5t/12)/sin β-A, the second circular hole (4) and the first slot
(5) clear distance between opening face is (t/3)/sin β-A/2.
5. measurement according to claim 1 is compared with the comparison reflector test block of light sheet weld defect, which is characterized in that when the
When three circular holes (6) are in the surface of the second slot (7), the clear distance between third circular hole (6) and the second slot (7) is 4t/5-
The hole of the second slot of A/2- (7) is high.
6. comparison reflector test block of the measurement described in -5 any one compared with light sheet weld defect according to claim 1, spy
Sign is that comparison reflector test block of the measurement compared with light sheet weld defect is the comparison for detecting strip defect in weld seam
When reflector test block:
First circular hole (3), the second circular hole (4) and third circular hole (6) run through test block ontology along the width direction of test block ontology (1)
(1)；First slot (5) and the second slot (7) run through the bottom surface of test block ontology (1) along the width direction of test block ontology (1).
7. comparison reflector test block of the measurement described in -5 any one compared with light sheet weld defect according to claim 1, spy
Sign is that the measurement is anti-for detecting the comparison of weld seam spot defect compared with the comparison reflector test block of light sheet weld defect
When beam test block, in the first circular hole (3), the second circular hole (4), third circular hole (6), the first slot (5) and on test block ontology (1)
The open end of two slots (7) offers arc-shaped groove (8), the first circular hole (3), the second circular hole (4) and third circular hole (6)
Open end is respectively positioned on the top of corresponding arc-shaped groove (8) arc surface, the open end position of the second circular hole (4) and the first slot (5)
In on the arc surface of same arc-shaped groove, the diameter of arc-shaped groove (8) is 10~30mm；
The blind hole of first circular hole (3), the second circular hole (4) and third circular hole (6) along the width direction of test block ontology (1)；First slot
Hole (5) and the second slot (7) do not run through the bottom surface of test block ontology (1) along the width direction of test block ontology (1)；First circular hole (3),
The depth of second circular hole (4) and third circular hole (6) is 3~6mm.
8. measuring the method compared with light sheet weld defect, which is characterized in that welded by measurement described in claim 1 compared with light sheet
The comparison reflector test block of seam defect carries out, and process is as follows:
Angle probe (2) is placed on to the top surface or bottom surface of test block ontology (1), angle probe (2) is to test block ontology (1) tilted transmitting
Ultrasonic wave, the ultrasonic wave that angle probe (2) is launched roundtrip can move ahead between the bottom surface and top surface of test block ontology (1)；
The position for adjusting angle probe (2), the ultrasonic wave for emitting angle probe (2) reach the first circular hole after reflecting at least twice
(3), the second circular hole (4), third circular hole (6), the first slot (5) and the second slot (7)；
The distance-of hole depth is made according to the back wave echo dB value of the first circular hole (3), the second circular hole (4) and third circular hole (6)
Amplitude curve；
Slot hole height-amplitude curve is made according to the back wave echo dB value of the first slot (5) and the second slot (7)；
Weld defect is analyzed by distance-amplitude curve and slot hole height-amplitude curve.
9. measurement according to claim 8 is compared with the method for light sheet weld defect, which is characterized in that the top court of plane F
It is tilted to the left end of test block ontology (1), when angle probe (2) is placed on the top surface of test block ontology (1), angle probe (2) transmitting surpasses
When sound wave reaches the second circular hole (4) after reflecting at least twice, angle probe (2) is located at the right side of the second circular hole (4)；It is visited when oblique
Head (2) is placed on the bottom surface of test block ontology (1), and the ultrasonic wave of angle probe (2) transmitting reaches second after reflecting at least twice
When circular hole (4), angle probe (2) is located at the left side of the second circular hole (4)；
When angle probe (2) is placed on the top surface of test block ontology (1), the ultrasonic wave of angle probe (2) transmitting by reflecting at least twice
After when reaching the first circular hole (3), angle probe (2) is located at the left side of the first circular hole (3)；When angle probe (2) is placed on test block ontology
(1) when the ultrasonic wave of bottom surface, angle probe (2) transmitting reaches the first circular hole (3) after reflecting at least twice, angle probe (2)
Positioned at the right side of the first circular hole (3).
10. measurement according to claim 8 is compared with the method for light sheet weld defect, which is characterized in that when test block ontology (1)
Roughness and weld seam base material roughness difference when, adjust the distance-amplitude curve figure amendment.
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