CN103969338A - Test method for automatically detecting flaws of aluminum alloy pre-stretching plate by using ultrasonic water immersion - Google Patents
Test method for automatically detecting flaws of aluminum alloy pre-stretching plate by using ultrasonic water immersion Download PDFInfo
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- CN103969338A CN103969338A CN201410219162.4A CN201410219162A CN103969338A CN 103969338 A CN103969338 A CN 103969338A CN 201410219162 A CN201410219162 A CN 201410219162A CN 103969338 A CN103969338 A CN 103969338A
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Abstract
The invention relates to a test method for automatically detecting flaws of an aluminum alloy pre-stretching plate by using ultrasonic water immersion and aims at achieving the nondestructive testing for detecting the internal flaws of the aluminum alloy pre-stretching plate by using an ultrasonic contact method. The method comprises the following steps: 1. manufacturing a plate to be flaw-detected, by using the aluminum alloy pre-stretching plate and debugging the flaw detection sensitivity; 2. completely immersing the plate into water, using the water as a coupling agent, and setting a scan resolution, a step resolution, a pulse repetition frequency and a scan speed; starting an ultrasonic water immersion automatic flaw detection machine, adopting a 10MHz ultrasonic probe, debugging the detection angle of the probe, and carrying out flaw detection for the plate to be flaw-detected; during flaw detection, keeping water temperature to be 20-50 DEG C; scanning to obtain a C scan image; after flaw detection ends, returning the probe. The method is used for flaw detection for the aluminum alloy pre-stretching plate.
Description
Technical field
The present invention relates to a kind of detection method of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate.
Background technology
Aluminum alloy pretensioning plate is the important materials for Aeronautics and Astronautics industry, and along with the high speed development of national defence and science and technology of aviation, the requirement that its internal soundness is detected is increasingly strict.The aluminum alloy pretensioning plate internal quality control that China produces is at present to adopt ultrasound wave contact method to carry out Non-Destructive Testing, but the shortcoming of contact method flaw detection is inefficiency, and flaw detection personnel labor intensity is large; Because human factor probe and the coupling pressure of sheet material have very big-difference, therefore defects assessment is produced to error; As the personnel's that detect a flaw flaw detection technical ability, flaw detection experience, sense of responsibility and work for a long time tiredly, make the accuracy of testing result produce error, make it often to occur the quality objection that both sides of supply and demand produce; In flaw detection in enormous quantities is produced, detection speed, acoustic beam coverage rate do not reach non-destructive testing standard requirement; Contact method flaw detection couplant is grease, and sheet material is adding man-hour, needs effects on surface to carry out cleaning oil pollution, is unfavorable for sanitary protection.
Summary of the invention
The object of the invention is the Non-Destructive Testing problem of the shortcoming for solving ultrasound wave contact method flaw detection aluminum alloy pretensioning plate inherent vice, and a kind of detection method of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate is provided.
A kind of detection method of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate, its concrete steps are: one, get the aluminum alloy pretensioning plate that the long 1500mm～8000mm of being of plate, the wide 900mm～1700mm of being of plate and sheet metal thickness are 6.5mm～120mm and make sheet material to be detected a flaw, people's industrial injury on sheet material to be detected a flaw is that aperture is the artificial flat-bottom hole of φ 0.4mm, φ 0.8mm or 1.2mm, debugging flaw detection sensitivity, makes to detect a flaw blind area below 2mm, two, hang sheet material to be detected a flaw is placed in water logging groove on hoistable platform with vacuum cup, it is immersed in the water completely, make couplant with water, start ultrasound wave water logging automatic inspection equipment, adopt 10MHz ultrasonic probe, and the detection angle of debugging probe, the end wave energy that can receive reach the highest after, set scanning resolution, step resolution, pulse repetition rate and sweep velocity, treating flaw detection sheet material detects a flaw, when flaw detection, water temperature remains between 20～50 DEG C, Scan pitch should be not more than the width of the effective acoustic beam of ultrasound wave while detection, after the end of scan, obtain C and sweep image, when finding that there is suspicious region, starting assessment probe accurately scans suspicious region, defect to scanning is carried out mark, after flaw detection finishes, probe playback, sheet material water outlet to be detected a flaw is dried,
Described scanning resolution≤1mm, step resolution≤42mm, pulse repetition rate≤1000MHz;
Sweep velocity should be not more than 300mm/s; Described ultrasonic probe comprises eight painting brush formula probes, eight point focusing probe, in the time of sheet metal thickness≤15mm, selects point focusing probe; In the time of sheet metal thickness > 15mm, select painting brush formula probe.
Advantage of the present invention:
The multiple probes of the present invention are lined up array, reduce the scanning time, and allow maximum stepping, boost productivity.The independent image data of each probe, forms a multiple C scanning series, makes data more accurate.Cover and larger step distance because painting brush formula probe can provide larger acoustic beam, can effectively improve the flaw detection efficiency of sheet material, therefore for aluminum alloy plate materials flaw detection in enormous quantities, adopt 8 passage painting brush formula probes to detect simultaneously.Can accurately locate, quantitatively the defect detecting by assessing probe the region of finding defect according to the C scanning result of painting brush formula probe.Because painting brush formula probe detection blind area is larger than focusing probe, the aluminum alloy pretensioning plate that is therefore 6mm～15mm for sheet metal thickness adopts 8 access points focusing probes to detect simultaneously.
Brief description of the drawings
Fig. 1 is the arrangement position schematic diagram of artificial flat-bottom hole on embodiment mono-aluminum alloy pretensioning plate;
Fig. 2 is the arrangement position schematic diagram of artificial flat-bottom hole on embodiment bis-aluminum alloy pretensioning plates;
Fig. 3 is the arrangement position schematic diagram of artificial flat-bottom hole on embodiment 3 Al alloy pretensioning plate;
Fig. 4 is the A type oscillogram of the artificial flat-bottom hole that on embodiment bis-aluminum alloy pretensioning plates, artificial flat-bottom hole sequence number is 13.
Embodiment
Embodiment one: a kind of detection method of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate, its concrete steps are: one, get the aluminum alloy pretensioning plate that the long 1500mm～8000mm of being of plate, the wide 900mm～1700mm of being of plate and sheet metal thickness are 6.5mm～120mm and make sheet material to be detected a flaw, people's industrial injury on sheet material to be detected a flaw is that aperture is the artificial flat-bottom hole of φ 0.4mm, φ 0.8mm or 1.2mm, debugging flaw detection sensitivity, makes to detect a flaw blind area below 2mm, two, hang sheet material to be detected a flaw is placed in water logging groove on hoistable platform with vacuum cup, it is immersed in the water completely, make couplant with water, start ultrasound wave water logging automatic inspection equipment, adopt 10MHz ultrasonic probe, and the detection angle of debugging probe, the end wave energy that can receive reach the highest after, set scanning resolution, step resolution, pulse repetition rate and sweep velocity, treating flaw detection sheet material detects a flaw, when flaw detection, water temperature remains between 20～50 DEG C, Scan pitch should be not more than the width of the effective acoustic beam of ultrasound wave while detection, after the end of scan, obtain C and sweep image, when finding that there is suspicious region, starting assessment probe accurately scans suspicious region, defect to scanning is carried out mark, after flaw detection finishes, probe playback, sheet material water outlet to be detected a flaw is dried,
Described scanning resolution is not more than 1mm, and step resolution is not more than 42mm, and pulse repetition rate is not more than 1000MHz;
Sweep velocity should be not more than 300mm/s; Described ultrasonic probe comprises eight painting brush formula probes, eight point focusing probe, in the time of sheet metal thickness≤15mm, selects point focusing probe; In the time of sheet metal thickness > 15mm, select painting brush formula probe, described eight painting brush formulas probe and eight point focusing probe are array combination probe.
Described scanning resolution is the number percent of probe beam width, and scanning resolution is less, and C scintigram is more clear, and accuracy in detection is higher, but detection time is longer.
Described step resolution is probe step width, and step resolution is less, and C scintigram is more clear, and accuracy in detection is higher, but detection time is longer.
According to the thickness strobe pulse repetition frequency of being visited sheet material; Thickness is large, should use lower pulse repetition rate; Thickness is little, can use higher pulse repetition rate, but too high, can produce illusion ripple, affects the differentiation of defect.
Improve pulse repetition rate, can improve sweep velocity.But sweep velocity is too fast, C scanning imagery is unintelligible.Thickness is less, and sweep velocity is faster.
The model of described ultrasound wave water logging automatic inspection equipment is Scan-Master.
Embodiment two: the difference of present embodiment and embodiment one is: be inclusion-free, bubble-free filtered water as the water of couplant in step 2.Other steps are identical with embodiment one.
Embodiment three: the difference of present embodiment and embodiment three is: the flaw detection water temperature in step 2 is 30～40 DEG C.Other steps are identical with embodiment three.
Embodiment four: the difference of present embodiment and embodiment one or two is: the sweep velocity in step 2 should be not more than 254mm/s.Other steps are identical with embodiment one or two.
Embodiment five: the difference of present embodiment and embodiment one or two is: in step 2, Scan pitch should be not more than 1/2 of ultrasound wave effective beam width while detection.Other steps are identical with embodiment one or two.
Verify beneficial effect by following examples:
Embodiment mono-: a kind of detection method of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate, its concrete steps are: one, get the aluminum alloy pretensioning plate that the long 2005mm of being of plate, the wide 1205mm of being of plate and sheet metal thickness are 14.5mm and make sheet material to be detected a flaw, people's industrial injury on sheet material to be detected a flaw is that aperture is the artificial flat-bottom hole of φ 0.4mm, φ 0.8mm or 1.2mm, debugging flaw detection sensitivity, two, hang sheet material to be detected a flaw is placed in water logging groove on hoistable platform with vacuum cup, it is immersed in the water completely, make couplant with water, start ultrasound wave water logging automatic inspection equipment, adopt 10MHz ultrasonic probe, and the detection angle of debugging probe, the end wave energy that can receive reach the highest after, set scanning resolution, step resolution, pulse repetition rate and sweep velocity, treating flaw detection sheet material detects a flaw, when flaw detection, water temperature remains between 20～50 DEG C, Scan pitch should be not more than the width of the effective acoustic beam of ultrasound wave while detection, after the end of scan, obtain C and sweep image, when finding that there is suspicious region, starting assessment probe accurately scans suspicious region, defect to scanning is carried out mark, after flaw detection finishes, probe playback, sheet material water outlet to be detected a flaw is dried,
Described scanning resolution is not more than 1mm, and step resolution is not more than 42mm, and pulse repetition rate is not more than 1000MHz;
Sweep velocity should be not more than 254mm/s; Described ultrasonic probe is eight point focusing probe, and described eight point focusing probe are array combination probe.
By embodiment mono-, obtain table 1 and Fig. 1, table 1 is the arrangement position of artificial flat-bottom hole on embodiment mono-aluminum alloy pretensioning plate, Fig. 1 is the arrangement position schematic diagram of artificial flat-bottom hole on embodiment mono-aluminum alloy pretensioning plate, from table 1 and Fig. 1, can detect specification by point focusing probe is all 0.8mm, the artificial flat-bottom hole of φ 1.2mm on 14.5 × 1205 × 2005mm model, meets testing requirement.
The arrangement position of artificial flat-bottom hole on table 1: embodiment mono-aluminum alloy pretensioning plate
Embodiment bis-: a kind of detection method of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate, its concrete steps are: one, getting plate long is 2000mm, plate is wide is that the aluminum alloy pretensioning plate that 1300mm and sheet metal thickness are 30mm is made sheet material to be detected a flaw, two, hang sheet material to be detected a flaw is placed in water logging groove on hoistable platform with vacuum cup, it is immersed in the water completely, make couplant with water, start ultrasound wave water logging automatic inspection equipment, adopt 10MHz ultrasonic probe, and the detection angle of debugging probe, the end wave energy that can receive reach the highest after, set scanning resolution, step resolution, pulse repetition rate and sweep velocity, treating flaw detection sheet material detects a flaw, when flaw detection, water temperature remains between 20～50 DEG C, Scan pitch should be not more than the width of the effective acoustic beam of ultrasound wave while detection, after the end of scan, obtain C and sweep image, when finding that there is suspicious region, starting assessment probe accurately scans suspicious region, defect to scanning is carried out mark, after flaw detection finishes, probe playback, sheet material water outlet to be detected a flaw is dried,
Described scanning resolution is not more than 1mm, and step resolution is not more than 42mm, and pulse repetition rate is not more than 1000MHz;
Sweep velocity should be not more than 254mm/s; Described ultrasonic probe comprises that eight painting brush formula probes, described eight painting brush formulas probe are array combination probe.
By embodiment bis-, obtain table 2, Fig. 2 and Fig. 4, table 2 is the arrangement position of artificial flat-bottom hole on embodiment bis-aluminum alloy pretensioning plates, Fig. 2 is the arrangement position schematic diagram of artificial flat-bottom hole on embodiment bis-aluminum alloy pretensioning plates, and Fig. 4 is the A type oscillogram of the artificial flat-bottom hole that on embodiment bis-aluminum alloy pretensioning plates, artificial flat-bottom hole sequence number is 13.
From table 2, Fig. 2 and Fig. 4, can detect specification with painting brush formula probe is all 0.8mm, the artificial flat-bottom hole of φ 1.2mm on 30 × 1300 × 2000mm model, except the artificial defect flat-bottom hole of upper blind area can not effectively detect, meets testing requirement.
The arrangement position of artificial flat-bottom hole on table 2: embodiment bis-aluminum alloy pretensioning plates
Embodiment tri-: a kind of detection method of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate, its concrete steps are: one, getting plate long is 2005mm, plate is wide is that the aluminum alloy pretensioning plate that 1205mm and sheet metal thickness are 95mm is made sheet material to be detected a flaw, two, hang sheet material to be detected a flaw is placed in water logging groove on hoistable platform with vacuum cup, it is immersed in the water completely, make couplant with water, start ultrasound wave water logging automatic inspection equipment, adopt 10MHz ultrasonic probe, and the detection angle of debugging probe, the end wave energy that can receive reach the highest after, set scanning resolution, step resolution, pulse repetition rate and sweep velocity, treating flaw detection sheet material detects a flaw, when flaw detection, water temperature remains between 20～50 DEG C, Scan pitch should be not more than the width of the effective acoustic beam of ultrasound wave while detection, after the end of scan, obtain C and sweep image, when finding that there is suspicious region, starting assessment probe accurately scans suspicious region, defect to scanning is carried out mark, after flaw detection finishes, probe playback, sheet material water outlet to be detected a flaw is dried,
Described scanning resolution is not more than 1mm, and step resolution is not more than 42mm, and pulse repetition rate is not more than 1000MHz;
Sweep velocity should be not more than 254mm/s; Described ultrasonic probe comprises eight painting brush formula probes, and described eight painting brush formulas probe is array combination probe.
By embodiment tri-, obtain table 3 and Fig. 3, table 3 is the arrangement position of artificial flat-bottom hole on embodiment 3 Al alloy pretensioning plate, Fig. 3 is the arrangement position schematic diagram of artificial flat-bottom hole on embodiment 3 Al alloy pretensioning plate, from table 3 and Fig. 3, can detect specification with painting brush formula probe is all 0.8mm, the artificial flat-bottom hole of φ 1.2mm on 95 × 1205 × 2005mm model, except the artificial defect flat-bottom hole of upper blind area can not effectively detect, meets testing requirement.
Table 3: the arrangement position of artificial flat-bottom hole on embodiment 3 Al alloy pretensioning plate
Claims (5)
1. the detection method of a ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate, it is characterized in that the detection method of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate, its concrete steps are: one, get the aluminum alloy pretensioning plate that the long 1500mm～8000mm of being of plate, the wide 900mm～1700mm of being of plate and sheet metal thickness are 6.5mm～120mm and make sheet material to be detected a flaw, people's industrial injury on sheet material to be detected a flaw is that aperture is the artificial flat-bottom hole of φ 0.4mm, φ 0.8mm or 1.2mm, debugging flaw detection sensitivity, makes to detect a flaw blind area below 2mm, two, hang sheet material to be detected a flaw is placed in water logging groove on hoistable platform with vacuum cup, it is immersed in the water completely, make couplant with water, start ultrasound wave water logging automatic inspection equipment, adopt 10MHz ultrasonic probe, and the detection angle of debugging probe, the end wave energy that can receive reach the highest after, set scanning resolution, step resolution, pulse repetition rate and sweep velocity, treating flaw detection sheet material detects a flaw, when flaw detection, water temperature remains between 20～50 DEG C, Scan pitch should be not more than the width of the effective acoustic beam of ultrasound wave while detection, after the end of scan, obtain C and sweep image, when finding that there is suspicious region, starting assessment probe accurately scans suspicious region, defect to scanning is carried out mark, after flaw detection finishes, probe playback, sheet material water outlet to be detected a flaw is dried,
Described scanning resolution is not more than 1mm, and step resolution is not more than 42mm, and pulse repetition rate is not more than 1000MHz;
Sweep velocity should be not more than 300mm/s; Described ultrasonic probe comprises eight painting brush formula probes, eight point focusing probe, in the time of sheet metal thickness≤15mm, selects point focusing probe; In the time of sheet metal thickness > 15mm, select painting brush formula probe.
2. the detection method of a kind of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate according to claim 1, is characterized in that in step 2, the water as couplant is inclusion-free, bubble-free filtered water.
3. the detection method of a kind of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate according to claim 1, is characterized in that the flaw detection water temperature in step 2 is 30～40 DEG C.
4. the detection method of a kind of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate according to claim 1, is characterized in that the sweep velocity in step 2 should be not more than 254mm/s.
5. the detection method of a kind of ultrasound wave water logging automatic flaw detection aluminum alloy pretensioning plate according to claim 1, is characterized in that Scan pitch in step 2 should be not more than 1/2 of the effective beam width of ultrasound wave while detection.
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| CN104792872A (en) * | 2015-04-23 | 2015-07-22 | 广西南南铝加工有限公司 | Ultrasonic detection method of sheet metal |
| CN104931581A (en) * | 2015-05-25 | 2015-09-23 | 广西南南铝加工有限公司 | Immersion phased array ultrasonic detection method for pre-stretched aluminum alloy plate |
| CN107345940A (en) * | 2017-09-14 | 2017-11-14 | 中国航发哈尔滨轴承有限公司 | A kind of method that water logging ultrasonic method carries out detecting flaw detection to copper-alloy pipe-material inside |
| CN108802191A (en) * | 2018-06-19 | 2018-11-13 | 安徽工业大学 | A kind of water logging defect detection on ultrasonic basis of rolled steel defect |
| CN109813260A (en) * | 2019-02-25 | 2019-05-28 | 燕山大学 | A kind of compound plate thickness of immersion compares detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104792872A (en) * | 2015-04-23 | 2015-07-22 | 广西南南铝加工有限公司 | Ultrasonic detection method of sheet metal |
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| CN108802191A (en) * | 2018-06-19 | 2018-11-13 | 安徽工业大学 | A kind of water logging defect detection on ultrasonic basis of rolled steel defect |
| CN108802191B (en) * | 2018-06-19 | 2021-04-23 | 安徽工业大学 | Water immersion ultrasonic flaw detection method for rolled steel defects |
| CN109813260A (en) * | 2019-02-25 | 2019-05-28 | 燕山大学 | A kind of compound plate thickness of immersion compares detection device |
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Application publication date: 20140806 |