CN104198583A - Ultrasonic echo measurement method and ultrasonic echo measurement device for debonding defect detection of common-base sandwich member - Google Patents
Ultrasonic echo measurement method and ultrasonic echo measurement device for debonding defect detection of common-base sandwich member Download PDFInfo
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- CN104198583A CN104198583A CN201410455817.8A CN201410455817A CN104198583A CN 104198583 A CN104198583 A CN 104198583A CN 201410455817 A CN201410455817 A CN 201410455817A CN 104198583 A CN104198583 A CN 104198583A
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Abstract
The invention relates to an ultrasonic echo measurement method and an ultrasonic echo measurement device for debonding defect detection of a common-base sandwich member. The measurement method comprises the following steps: (1) performing multiple times of ultrasonic canning detection on typical positions according to a set path by using a probe, and establishing a database of effective echo number of different types of debonding defects and the distance relation of the probe and the debonding defect boundary, wherein the typical positions comprise positions without debonding defect, metal plate and bonding layer debonding defect positions and bonding layer and foam debonding defect positions; and (2) performing overall ultrasonic scanning detection on the surface of a metal plate of a to-be-detected common-base sandwich member, and determining the type and the boundary of the debonding defect according to the comparison result of the detected effective echo number and the database. The measurement device comprises a data acqusition device, an ultrasonic generator and an ultrasonic probe which are connected in sequence. Compared with the prior art, the method and the device have the advantages of no destructiveness, quickness, effectiveness and the like.
Description
Technical field
The present invention relates to a kind of Dynamic Non-Destruction Measurement, especially relate to a kind of end sandwich component debonding defect detects altogether ultrasonic echo measuring method and device.
Background technology
Large-scale end sandwich component is altogether the critical component of carrier rocket fuel tank of new generation, and it is made up of PMI foam core and the cooperation of aluminium alloy upper and lower panel, adhesive solidification, for isolating kerosene, liquid oxygen fuel.In actual manufacture process, due to the complicacy of structure and the restriction of working condition, easily cause the debonding defect of sandwich component of the common end.The foam layer altogether debonding defect of primer junction structure comprises between sheet metal and glue-line between unsticking and glue-line and foam two kinds of unstickings.Guarantee successful launch in order to maintain rocket body stability, require end sandwich component altogether to there is very high gluing quality, specifically need meet following technical indicator: after sandwich and upper and lower panel bonding, every place unsticking area is less than 625mm
2, the unsticking total area be not more than panel surface long-pending 5%.Reducing debonding defect area is to improve the major issue of end sandwich component intensity altogether, first needs debonding defect accurately to detect.Also there is the deficiency that precision is inadequate in existing debonding defect detection method.
Ultrasound examination is a kind of lossless detection method, does not need to carry out destructive test to detecting position.The energy variation of its acoustical behavior difference of utilizing material and defect thereof to ultrasound wave waveform reflection case with while penetrating carried out experimental material inherent vice, there is easy operating, the feature that quick, reliable, highly sensitive, degree of accuracy is high and portable, kind and the position distribution that can accurately determine defect, be widely used.
Summary of the invention
Object of the present invention is exactly to provide a kind of ultrasonic echo measuring method and device harmless, that end sandwich component debonding defect detects altogether fast and effectively in order to overcome the defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of ultrasonic echo measuring method that end sandwich component debonding defect detects altogether, described sandwich component of the common end comprises double layer of metal plate, is located at the foam between double layer of metal plate and is located at sheet metal the glue-line between foam, it is characterized in that, described measuring method comprises the following steps:
1) utilizing probe to carry out repeated ultrasonic scanning to exemplary position by set path detects, set up the database of effective echo number and probe and the debonding defect frontier distance relation of dissimilar debonding defect, described exemplary position comprises without debonding defect position, sheet metal and glue-line debonding defect position and glue-line and foam debonding defect position;
2) metal sheet surface of end sandwich component altogether to be measured is carried out to overall ultrasonic scanning detection, the effective echo number obtaining according to detection and the comparing result of described database, determine debonding defect type and border.
Carry out before ultrasonic scanning detection, couplant is applied to sandwich component surface, the common end.
Described couplant comprises glycerine or water.
The method also comprises:
The debonding defect feature modeling debonding defect area obtaining according to detection, and judge whether debonding defect size meets the manufacture requirement of end sandwich component altogether.
The ultrasonic echo measurement mechanism that end sandwich component debonding defect detects altogether, is characterized in that, comprises the data acquisition unit, ultrasonic generator and the ultrasonic probe that connect successively, and described ultrasonic probe is sticked on the sheet metal of end sandwich component altogether to be measured; Wherein, described data acquisition unit shows effective echo number and echo attenuation ratio.
The frequency of described ultrasonic probe is 5-30Mhz, and probe diameter is 1-30 millimeter.
Described ultrasonic probe is double crystal probe, contact probe, delay block probe or immersion type probe.
Compared with prior art, the present invention has the following advantages:
1) the present invention adopts ultrasound examination, and ultrasound examination is a kind of lossless detection method, and it does not need structure to carry out destructive test.
2) the present invention is when sandwich component detects at the common end, and model database can judge fast the type of debonding defect and determine border and the area of debonding defect, judges accordingly the standard whether structure glue cement amount meets the demands.
Brief description of the drawings
Fig. 1 is the structural representation of sandwich component of the common end, and wherein (a) is the member with sheet metal and glue-line debonding defect, is (b) member with glue-line and foam debonding defect;
Fig. 2 is the structural representation of measurement mechanism of the present invention;
Fig. 3 is scanning probe path schematic diagram;
Fig. 4 is ultrasound examination echo character curve synoptic diagram of the present invention;
Fig. 5 is embodiment of the present invention echo number-probe distance debonding defect frontier distance staqtistical data base;
Fig. 6 is method of testing schematic flow sheet of the present invention.
In figure, 1, sheet metal, 2, glue-line, 3, foam, 4, debonding defect between sheet metal and glue-line, 5, debonding defect between glue-line and foam, 6, data acquisition unit, 7, ultrasonic generator, 8, ultrasonic probe, 9, couplant.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment is implemented as prerequisite taking technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, be total to end sandwich component and comprise double layer of metal plate 1, be located at the foam 3 of 1 of double layer of metal plate and be located at sheet metal 1 glue-line 2 between foam 3, wherein, the material of sheet metal 1 is steel, aluminium, magnesium etc., the combination that the gluing binder that glue-line 2 uses is thermosetting resin adhesive, ger-bond, rubber-type binder or three kinds, foam 3 is Polymethacrylimide, polystyrene foam and hard polyurethane foams etc., and the whole thickness of end sandwich component is altogether 0.1-10 millimeter.
As shown in Figure 2, the invention is integrated into a system by data acquisition unit 6, ultrasonic generator 7, ultrasonic probe 8 sandwich component of the common end is carried out to debonding defect and Boundary Detection thereof, data acquisition unit 6, ultrasonic generator 7, ultrasonic probe 8 connect successively, and ultrasonic probe 8 is sticked on the sheet metal 1 of end sandwich component altogether to be measured.When detection, ultrasonic probe 8 is along path movement shown in Fig. 3, and data acquisition unit 6 can show effective echo number and echo attenuation ratio in testing process, as shown in Figure 4.Can there is the A-mode ultrasonic ripple of 1-30MHz in ultrasonic generator 7; Ultrasonic probe 8 is contact probe, can be double crystal probe, contact probe, delay block probe or immersion type probe etc., and frequency is 10MHz, and the delay block end face diameter mating with probe is 7.87mm, and postponing fast length is 11.4mm.
When the present invention detects sandwich component different situations of the common end (without unsticking between unsticking, glue-line and foam between debonding defect, sheet metal and glue-line) position according to contact ultrasonic probe, the effective echo number difference reflecting in data acquisition unit is carried out defects detection, generally, without unsticking position number of echoes between unsticking position number of echoes < glue-line and foam between debonding defect position number of echoes < sheet metal and glue-line.Measuring method concrete steps of the present invention are as shown in Figure 6:
In step s101, ultrasonic probe is installed on ultrasonic generator, before detection, the parameter of data acquisition unit is rationally arranged, and apply couplant 9 on sheet metal 1, couplant 9 is the liquid such as glycerine or water.The parameter that data acquisition unit need to arrange comprises gain, screen display scope, Output rusults and automatic stay condition.In the present embodiment, gain G ain is 18dB, and screen display scope Range is 29mm, and Output rusults is effective echo number BWE.
In step s102, utilizing probe to carry out repeated ultrasonic scanning to exemplary position by set path detects, the database of setting up effective echo number and probe and the debonding defect frontier distance relation of dissimilar debonding defect, described exemplary position comprises without debonding defect position, sheet metal and glue-line debonding defect position and glue-line and foam debonding defect position.
In the present embodiment, the effective echo number obtaining without debonding defect position probing is 5, and effective echo number that between sheet metal and glue-line, unsticking position probing obtains is 10, and effective echo number that between glue-line and foam, unsticking position probing obtains is 6.Meanwhile, at debonding defect boudary portion, the corresponding debonding defect area of contact ultrasonic probe difference, effective echo number difference in echo.
When ultrasonic probe detects along direction shown in Fig. 3, in the process from a to d, experience from without debonding defect position to there is debonding defect position sheet metal and glue-line, its echo number increases gradually, and finally reaches stable.It is N1 that the echo number obtaining is detected at a place, and b place is N2, is respectively the detection of echoes number at zero defect position and sheet metal and glue-line unsticking position.At debonding defect boundary position, when detection, one side number of echoes is that (b), opposite side number of echoes is N2 to N1 in position.Probe moves along direction shown in Fig. 3, sets up the database of number of echoes N--probe apart from debonding defect frontier distance t, as shown in Figure 5.
In step s103, ultrasonic probe end face is close on metal sheet surface, along certain path, end sandwich component metal sheet surface altogether to be measured is carried out to complete ultrasound examination, record result, echo number and database that detection is obtained are compared, and judge whether the debonding defect that has debonding defect and have which kind of type; In the time that judgement detection position exists debonding defect, by the contrast of unsticking position echo number and database, determine debonding defect border.The debonding defect feature modeling debonding defect area obtaining according to detection, and judge whether debonding defect size meets the manufacture requirement of end sandwich component altogether.
Claims (7)
1. the ultrasonic echo measuring method that end sandwich component debonding defect detects altogether, described sandwich component of the common end comprises double layer of metal plate, is located at the foam between double layer of metal plate and is located at sheet metal the glue-line between foam, it is characterized in that, described measuring method comprises the following steps:
1) utilizing probe to carry out repeated ultrasonic scanning to exemplary position by set path detects, set up the database of effective echo number and probe and the debonding defect frontier distance relation of dissimilar debonding defect, described exemplary position comprises without debonding defect position, sheet metal and glue-line debonding defect position and glue-line and foam debonding defect position;
2) metal sheet surface of end sandwich component altogether to be measured is carried out to overall ultrasonic scanning detection, the effective echo number obtaining according to detection and the comparing result of described database, determine debonding defect type and border.
2. a kind of ultrasonic echo measuring method that end sandwich component debonding defect detects altogether according to claim 1, is characterized in that, carries out before ultrasonic scanning detection, and couplant is applied to sandwich component surface, the common end.
3. a kind of ultrasonic echo measuring method that end sandwich component debonding defect detects altogether according to claim 2, is characterized in that, described couplant comprises glycerine or water.
4. a kind of ultrasonic echo measuring method that end sandwich component debonding defect detects altogether according to claim 1, is characterized in that, also comprises:
The debonding defect feature modeling debonding defect area obtaining according to detection, and judge whether debonding defect size meets the manufacture requirement of end sandwich component altogether.
5. realize the measurement mechanism of the ultrasonic echo measuring method that end sandwich component debonding defect detects as claimed in claim 1 altogether for one kind, it is characterized in that, comprise the data acquisition unit, ultrasonic generator and the ultrasonic probe that connect successively, described ultrasonic probe is sticked on the sheet metal of end sandwich component altogether to be measured; Wherein, described data acquisition unit shows effective echo number and echo attenuation ratio.
6. a kind of ultrasonic echo measurement mechanism that end sandwich component debonding defect detects altogether according to claim 5, is characterized in that, the frequency of described ultrasonic probe is 5-30Mhz, and probe diameter is 1-30 millimeter.
7. a kind of ultrasonic echo measurement mechanism that end sandwich component debonding defect detects altogether according to claim 6, is characterized in that, described ultrasonic probe is double crystal probe, contact probe, delay block probe or immersion type probe.
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Cited By (12)
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| CN104977356A (en) * | 2015-07-31 | 2015-10-14 | 中航复合材料有限责任公司 | Composite material foam structure ultrasonic detection method based on reflection theory |
| CN105004793A (en) * | 2015-07-31 | 2015-10-28 | 中航复合材料有限责任公司 | Ultrasonic testing method used for composite material foaming structures |
| CN106197331A (en) * | 2015-05-07 | 2016-12-07 | 上海通用汽车有限公司 | Ultrasonic wave detecting system |
| CN106595984A (en) * | 2016-12-30 | 2017-04-26 | 国家电网公司 | Combined electric appliance flange glue filling sealing detection method |
| CN107085040A (en) * | 2017-04-21 | 2017-08-22 | 华南理工大学 | A kind of composite insulator unsticking detection method based on torsion mode supersonic guide-wave |
| CN109521094A (en) * | 2018-11-28 | 2019-03-26 | 湖北三江航天红阳机电有限公司 | One kind can ceramizable resin matrix composite material tiltedly fold winding product internal soundness acoustic resonance detection method |
| CN109781856A (en) * | 2019-02-25 | 2019-05-21 | 河北普阳钢铁有限公司 | The method that double-crystal normal probe judges field trash group defect in flat metal plate |
| CN110530984A (en) * | 2019-09-26 | 2019-12-03 | 中国石油大学(华东) | A kind of ultrasonic detection method of pipeline coating defect |
| CN111257419A (en) * | 2020-02-03 | 2020-06-09 | 天津大学 | Extra-high voltage insulation pull rod interface defect detection device |
| CN111257417A (en) * | 2020-02-03 | 2020-06-09 | 天津大学 | Method for detecting interface defects of extra-high voltage insulating pull rod |
| CN111855813A (en) * | 2019-04-26 | 2020-10-30 | 中国石油化工股份有限公司 | Detection device and detection method |
| CN114152422A (en) * | 2021-12-02 | 2022-03-08 | 国家石油天然气管网集团有限公司 | Method for detecting non-external defect type of pipeline in oil and gas pipeline excavation site |
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| CN106197331A (en) * | 2015-05-07 | 2016-12-07 | 上海通用汽车有限公司 | Ultrasonic wave detecting system |
| CN104977356B (en) * | 2015-07-31 | 2020-06-09 | 中航复合材料有限责任公司 | Composite material foam structure ultrasonic detection method based on reflection principle |
| CN105004793A (en) * | 2015-07-31 | 2015-10-28 | 中航复合材料有限责任公司 | Ultrasonic testing method used for composite material foaming structures |
| CN104977356A (en) * | 2015-07-31 | 2015-10-14 | 中航复合材料有限责任公司 | Composite material foam structure ultrasonic detection method based on reflection theory |
| CN105004793B (en) * | 2015-07-31 | 2020-06-09 | 中航复合材料有限责任公司 | Ultrasonic detection method for composite material foam structure |
| CN106595984A (en) * | 2016-12-30 | 2017-04-26 | 国家电网公司 | Combined electric appliance flange glue filling sealing detection method |
| CN106595984B (en) * | 2016-12-30 | 2019-06-18 | 国家电网公司 | A kind of combined electrical apparatus flange sealant pouring and sealing detection method |
| CN107085040A (en) * | 2017-04-21 | 2017-08-22 | 华南理工大学 | A kind of composite insulator unsticking detection method based on torsion mode supersonic guide-wave |
| CN109521094A (en) * | 2018-11-28 | 2019-03-26 | 湖北三江航天红阳机电有限公司 | One kind can ceramizable resin matrix composite material tiltedly fold winding product internal soundness acoustic resonance detection method |
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| CN111855813A (en) * | 2019-04-26 | 2020-10-30 | 中国石油化工股份有限公司 | Detection device and detection method |
| CN110530984A (en) * | 2019-09-26 | 2019-12-03 | 中国石油大学(华东) | A kind of ultrasonic detection method of pipeline coating defect |
| CN111257417A (en) * | 2020-02-03 | 2020-06-09 | 天津大学 | Method for detecting interface defects of extra-high voltage insulating pull rod |
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