CN113504308A - Method for positioning defects of artificial flat bottom holes in test block - Google Patents
Method for positioning defects of artificial flat bottom holes in test block Download PDFInfo
- Publication number
- CN113504308A CN113504308A CN202110769633.9A CN202110769633A CN113504308A CN 113504308 A CN113504308 A CN 113504308A CN 202110769633 A CN202110769633 A CN 202110769633A CN 113504308 A CN113504308 A CN 113504308A
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- probe
- test block
- echo
- point
- flat
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- 238000012360 testing method Methods 0.000 title claims abstract description 58
- 230000007547 defect Effects 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000523 sample Substances 0.000 claims abstract description 38
- 238000001514 detection method Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000003908 quality control method Methods 0.000 abstract description 4
- 238000011156 evaluation Methods 0.000 abstract description 3
- 208000027418 Wounds and injury Diseases 0.000 description 5
- 230000006378 damage Effects 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
Classifications
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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
- 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
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
-
- 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
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
Abstract
The invention relates to a method for positioning defects of artificial flat-bottom holes in test blocks, which comprises the steps of placing the test blocks in a water tank, and vertically adjusting a probe for ultrasonic detection; placing the probe right above the test block to enable the surface echo of the test block to reach a first preset proportion; and moving the probe to the edge of the test block along the transverse direction, then moving the probe to two sides along the longitudinal direction, finding a point with the highest interface reflection echo, if the interface echo of the point is higher than a second preset proportion, continuing to move to the edge of the test block along the transverse direction, then moving the probe to two sides along the longitudinal direction until the height of the reflection echo at the highest point of the interface reflection echo is the second preset proportion, namely finding a tangent point of the edge of the test block, then moving the probe to the center along the transverse direction for a radius distance, and finely adjusting the position of the probe to find the point with the highest reflection echo of the flat-bottom hole, namely the position of the flat-bottom hole. The method disclosed by the invention is simple and feasible to operate, accurate and quick in positioning, and the efficiency of subsequent natural defect equivalent evaluation and part quality control is improved.
Description
Technical Field
The invention belongs to the technical field of nondestructive testing, and particularly relates to a method for positioning defects of a manual flat bottom hole in a test block.
Background
It is a common nondestructive testing method to obtain the equivalent of natural defect by comparing the echo of natural defect with the echo of artificial flat-bottom hole defect on the test block. For defects of the same nature and size, the echo heights reflected by the defects are different due to the difference in depth (acoustic path). In actual work, distance-amplitude defects (DAC curves) of artificial reflectors with the same size and different depths need to be made to describe the relation of the reflector echo height along with the change of the distance. The DAC curve is manufactured by positioning the DAC curve to the position of a flat bottom hole of a reference test block to record the height of a reflected wave, and how to quickly position the DAC curve to the position of an artificial flat bottom hole (finding the hole) in the test block is particularly important.
Disclosure of Invention
In view of the above situation in the prior art, the present invention aims to provide a method for locating a flat bottom hole defect in a test block, which aims to quickly find the flat bottom hole position and the echo thereof, provide a basis for evaluating natural defects, and provide support for subsequent part quality control, when measuring the echo of the flat bottom hole defect on the test block during DAC curve production.
The purpose of the invention is realized by the following technical scheme:
a method for positioning defects of artificial flat-bottom holes in test blocks comprises the following steps:
placing a cylindrical reference block containing the defects of the artificial flat-bottom hole in a water tank filled with water, and adjusting the ultrasonic detection probe to be vertical;
placing a probe for ultrasonic detection right above a comparison test block to enable the surface echo of the comparison test block to reach a first preset proportion of full scales of ultrasonic detection;
slowly moving the probe to the edge of the test block along the transverse direction of the upper surface of the test block until the interface reflection echo of the test block is reduced, then moving the probe to two sides along the longitudinal direction of the upper surface of the test block to find a point with the highest interface reflection echo, if the interface echo of the highest point is higher than a second preset proportion of the full scale of ultrasonic detection, and the second preset proportion is lower than the first preset proportion, continuously and slowly moving the probe to the edge of the test block along the transverse direction, and then moving the probe to two sides along the longitudinal direction after the highest point of the interface reflection echo is found until the height of the reflection echo of the highest point of the interface reflection echo is the second preset proportion, namely the cut point of the edge of the test block;
after finding the tangent point of the edge of the test block, moving the radius distance to the center along the transverse direction, namely, the reflection echo of the flat-bottom hole occurs, finely adjusting the position of the probe, and finding the point with the highest reflection echo of the flat-bottom hole, namely, the position of the flat-bottom hole.
The method disclosed by the invention is simple and feasible to operate, accurate and quick in positioning, and the efficiency of subsequent natural defect equivalent evaluation and part quality control is improved.
Drawings
FIG. 1 is a component of a system for locating the location of an artificial wound employed in the method of the present invention;
FIG. 2 is a schematic diagram of the method for locating defects in a manual flat-bottom hole in a test block according to the present invention.
Detailed Description
For a clearer understanding of the objects, technical solutions and advantages of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
The positioning method is realized by adopting an ultrasonic water immersion method. FIG. 1 illustrates the components of a system for locating the location of an artificial wound used in the method of the present invention, which, as shown, comprises: the ultrasonic detection device comprises an ultrasonic detection instrument 1, a probe 2 for ultrasonic detection, a cylindrical contrast test block 3, a water tank 4, a test block frame 5, a mechanical scanning system 6 and a computer 7, wherein the test block frame 5 is arranged in the water tank 4 filled with water, the cylindrical contrast test block 3 with the defect of an artificial flat bottom hole is arranged on the test block frame 5, the probe 2 for ultrasonic detection is immersed in the water, the dotted line in the figure 1 represents the water surface, and the computer 7 controls the ultrasonic detection instrument 1 and the mechanical scanning system 6 for two-dimensionally moving the probe 2 for ultrasonic detection.
FIG. 2 is a schematic diagram of the method for locating defects in a manual flat-bottom hole in a test block according to the present invention. In the embodiment of the invention, the artificial injury position of 1 high-temperature alloy test block with the diameter of 50mm and the artificial injury burial depth of 15mm is positioned, the diameter of the artificial injury is 0.4mm, and the position and the depth of an artificial flat bottom hole are shown by dotted lines in figure 2. The instrument for detection is USI P40, the mechanical scanning system is SM-J6B-100, the detection probe is a 10MHz focusing probe, the focal length is 89mm, and the probe detection water distance is 40 mm. Placing a test block 3 on a test block frame 5 of a water tank 4, placing a probe 2 on a large plane of the test block frame 5, and adjusting an A, B axis of the probe to maximize an interface echo when a water distance is 100mm, namely, the water distance is beyond a focal distance, wherein the probe is vertically adjusted; and step two, the probe 2 is arranged right above the test block 3, and the sensitivity of the ultrasonic detection instrument 1 is adjusted, so that the echo on the surface of the test block reaches 80% of the full scale of the fluorescent screen of the ultrasonic detection instrument 1. The probe 2 is slowly moved towards the edge of the test block 3 along the transverse direction of the upper surface of the test block 3 until the interface reflection echo of the test block 3 is reduced, and then the probe is moved towards two sides along the longitudinal direction 9 (vertical to the transverse direction 8) of the upper surface of the test block 3 to find the point with the highest interface reflection echo. If the echo of the highest point interface is higher than 40% of the full scale of the fluorescent screen of the ultrasonic detection instrument 1, the probe 2 is continuously and slowly moved to the edge of the test block along the transverse direction 8, and then moved to the two sides along the longitudinal direction 9 until the height of the highest point reflected echo of the interface reflected echo is 40%, namely the current point is the tangent point 10 of the edge of the test block. And step three, after finding the tangent point 10 of the edge of the test block, moving the test block to the center along the transverse direction 8 by 25mm (namely the radius distance of the test block 3), namely, the reflected echo of the flat-bottom hole occurs, finely adjusting the position of the probe, and finding the point with the highest reflected echo of the flat-bottom hole, namely, the position 11 of the flat-bottom hole.
The method disclosed by the invention is simple and feasible to operate, accurate and quick in positioning, and the efficiency of subsequent natural defect equivalent evaluation and part quality control is improved.
Claims (5)
1. A method for positioning defects of artificial flat-bottom holes in test blocks comprises the following steps:
placing a cylindrical reference block containing the defects of the artificial flat-bottom hole in a water tank filled with water, and adjusting the ultrasonic detection probe to be vertical;
placing a probe for ultrasonic detection right above a comparison test block to enable the surface echo of the comparison test block to reach a first preset proportion of full scales of ultrasonic detection;
slowly moving the probe to the edge of the test block along the transverse direction of the upper surface of the test block until the interface reflection echo of the test block is reduced, then moving the probe to two sides along the longitudinal direction of the upper surface of the test block to find a point with the highest interface reflection echo, if the interface echo of the highest point is higher than a second preset proportion of the full scale of ultrasonic detection, and the second preset proportion is lower than the first preset proportion, continuously and slowly moving the probe to the edge of the test block along the transverse direction, and then moving the probe to two sides along the longitudinal direction after the highest point of the interface reflection echo is found until the height of the reflection echo of the highest point of the interface reflection echo is the second preset proportion, namely the cut point of the edge of the test block;
after finding the tangent point of the edge of the test block, moving the radius distance to the center along the transverse direction, namely, the reflection echo of the flat-bottom hole occurs, finely adjusting the position of the probe, and finding the point with the highest reflection echo of the flat-bottom hole, namely, the position of the flat-bottom hole.
2. The method of claim 1, wherein the first predetermined proportion is 80%.
3. A method according to claim 1 or 2, wherein said second predetermined proportion is 40%.
4. The method of claim 1, wherein orienting the ultrasonic test probe vertically comprises positioning the probe in the plane of the bottom surface of the cylindrical reference block, positioning the water distance out of focus, and adjusting the A, B axis of the probe to maximize the interface echo.
5. The method of claim 4, wherein the plane is a surface of a block rack located in the water bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110769633.9A CN113504308A (en) | 2021-07-07 | 2021-07-07 | Method for positioning defects of artificial flat bottom holes in test block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110769633.9A CN113504308A (en) | 2021-07-07 | 2021-07-07 | Method for positioning defects of artificial flat bottom holes in test block |
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| Publication Number | Publication Date |
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| CN113504308A true CN113504308A (en) | 2021-10-15 |
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| CN202110769633.9A Pending CN113504308A (en) | 2021-07-07 | 2021-07-07 | Method for positioning defects of artificial flat bottom holes in test block |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694484A (en) * | 2009-10-22 | 2010-04-14 | 中国第一重型机械股份公司 | Method for ultrasonic locating defect in austenitic stainless steel weld joint |
| CN108008010A (en) * | 2017-11-22 | 2018-05-08 | 上海船舶工程质量检测有限公司 | A kind of quantitative test block of oblique incidence flat-bottom hole reflection |
| CN108107112A (en) * | 2016-11-25 | 2018-06-01 | 核工业西南物理研究院 | A kind of ultrasonic phase nondestructive means suitable for beryllium-copper chromium zirconium linkage interface |
| CN112525996A (en) * | 2020-12-08 | 2021-03-19 | 中国科学院金属研究所 | Ultrasonic imaging detection method for isotropic pyrolytic graphite |
-
2021
- 2021-07-07 CN CN202110769633.9A patent/CN113504308A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694484A (en) * | 2009-10-22 | 2010-04-14 | 中国第一重型机械股份公司 | Method for ultrasonic locating defect in austenitic stainless steel weld joint |
| CN108107112A (en) * | 2016-11-25 | 2018-06-01 | 核工业西南物理研究院 | A kind of ultrasonic phase nondestructive means suitable for beryllium-copper chromium zirconium linkage interface |
| CN108008010A (en) * | 2017-11-22 | 2018-05-08 | 上海船舶工程质量检测有限公司 | A kind of quantitative test block of oblique incidence flat-bottom hole reflection |
| CN112525996A (en) * | 2020-12-08 | 2021-03-19 | 中国科学院金属研究所 | Ultrasonic imaging detection method for isotropic pyrolytic graphite |
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Application publication date: 20211015 |
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