CN104677990B - A kind of the cannot-harm-detection device and method of automatic detection thin plate point quality - Google Patents
A kind of the cannot-harm-detection device and method of automatic detection thin plate point quality Download PDFInfo
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- CN104677990B CN104677990B CN201510099819.2A CN201510099819A CN104677990B CN 104677990 B CN104677990 B CN 104677990B CN 201510099819 A CN201510099819 A CN 201510099819A CN 104677990 B CN104677990 B CN 104677990B
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Abstract
The invention discloses a kind of the cannot-harm-detection device of automatic detection thin plate point quality, including control circuit, couplant injecting mechanism, at least one detection probe mechanism, quality evaluation mechanism；The couplant organization of supply includes tank, water pump and magnetic valve, and the control circuit control water pump and magnetic valve perform opening and closing action, and the P mouths of the magnetic valve are connected with water pump, and the water pump is connected with tank, and the T mouths of the magnetic valve are connected with tank；The detection probe mechanism includes high frequency ultrasound probe and probe outer cover, and the probe outer cover is provided with inlet opening and fluid hole, and the A mouths of the inlet opening and magnetic valve are connected, the B mouths connection of the fluid hole and magnetic valve；The quality evaluation mechanism includes supersonic reflectoscope and computer, and the supersonic reflectoscope is connected with high frequency ultrasound probe, and the computer is connected with supersonic reflectoscope.The present invention can realize the online automatic detection of large-scale thin plate point quality.
Description
Technical field
The invention belongs to ultrasonic wave lift-off technology field, and in particular to a kind of lossless inspection of automatic detection thin plate point quality
Method and device is surveyed, it is detected using the local immersion method of ultrasonic wave, it is adaptable to the large-scale vehicle body Sheet resistance spot welding of vehicle factory
The online automatic detection of Joining Technology.
Background technology
In the manufacturing process of body of a motor car, welding is main Joining Technology method, especially resistance spot welding.One finished product
Solder joint number on body of a motor car up to thousands of, the quality of these solder joints directly affects body quality and vehicle performance, protects
The quality of card spot welding is to improve one of main method of vehicle safety performance, therefore the quality testing of resistance spot welding has important meaning
Justice.
With the fast development of point quality on-line monitoring and postwelding lossless detection method, at present, vehicle factory is urgently sought
The equipment of online automatic detection quality of welding spot can be realized by looking for, to ensure the qualification of every product quality of welding spot.Utilize monitoring
The parameter of quality of welding spot is directly affected in pinpoint welding procedure, and the parameter feedback measured is controlled into its welding quality to control system
Method be referred to as point quality on-line real time monitoring, online automatic detection must low cost, efficiency high, easy to operate, adaptability
By force, accuracy of detection is high, highly reliable, the equipment not condition such as cracky.But, due to the complexity of resistance spot welding process and not true
Qualitative, the monitoring in real time of point quality is relatively difficult in production process, and postwelding Non-Destructive Testing is used as popular research in recent years
Problem, its realization is relatively easy to, but due to the uniqueness of its operating environment, it is also more difficult to be applied to on-line checking.How by postwelding
Non-Destructive Testing principle is applied in online automatic detection, produces point quality on-line automatic monitoring system, and meet online certainly
The condition of dynamic detection is the key of the invention to be studied.
The content of the invention
It is an object of the invention to provide a kind of lossless detection method and device of automatic detection thin plate point quality, its profit
The online automatic detection of large-scale thin plate point quality is realized with the local immersion method of ultrasonic wave, with low cost, efficiency high, operation letter
Just, strong adaptability, accuracy of detection be high, highly reliable, equipment not cracky the advantages of.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of the cannot-harm-detection device of automatic detection thin plate point quality is provided, the device includes：Control circuit, couplant
Injecting mechanism, at least one detection probe mechanism and quality evaluation mechanism；
The couplant injecting mechanism includes tank, water pump and magnetic valve, and the control circuit passes through Control water
Pump and magnetic valve perform opening and closing action, and the magnetic valve includes tetra- mouths of A, B, P, T, and the P mouths of the magnetic valve pass through
Pipeline is connected with water pump, and the water pump is connected by pipeline with tank, and the T mouths of the magnetic valve are connected by pipeline with tank,
Couplant is contained in the tank；
The detection probe mechanism, which includes being provided with high frequency ultrasound probe and probe outer cover, the high frequency ultrasound probe, to prolong
Slow block, the high frequency ultrasound probe is arranged in probe outer cover, and the probe outer cover is provided with inlet opening and fluid hole, it is described enter
Fluid apertures is connected by the A mouths of pipeline and magnetic valve, and the fluid hole is connected by the B mouths of pipeline and magnetic valve, outside the probe
Cover is tightly connected with the thin plate at solder joint to be measured；
The quality evaluation mechanism includes supersonic reflectoscope and computer, and the supersonic reflectoscope is visited with high frequency ultrasound
Head connection, the computer is connected with supersonic reflectoscope.
By above-mentioned technical proposal, the control circuit includes PLC, three self-resetting switch and two relays, the PLC
Input be connected respectively with three self-resetting switch, the output end of the PLC is connected with two relays respectively.
By above-mentioned technical proposal, the wafer diameter of the high frequency ultrasound probe is straight equal to the minimum nugget of thin plate to be measured
Footpath.
By above-mentioned technical proposal, the probe outer cover transparent with machine plastics by being made.
By above-mentioned technical proposal, rubber ring is installed between the probe outer cover and thin plate to be measured.
By above-mentioned technical proposal, the inlet opening and fluid hole of the probe outer cover are the cylindrical hole of outwardly convex.
By above-mentioned technical proposal, the pipeline is rubber tube.
Accordingly, the present invention also provides a kind of lossless detection method of automatic detection thin plate point quality, including following step
Suddenly：
S1, the device described in claim 1 and solder joint to be measured carried out to match positioning, probe outer cover is placed on weldering to be measured
Point place, applying pressure at right angle will pop one's head in outer cover and thin plate to be measured compression, and ensure the wafer plane of high frequency ultrasound probe with it is to be measured
The plate face of thin plate is parallel；
S2, control circuit perform breakdown action by Control water pump and magnetic valve, make couplant in the work of water pump
With it is lower by magnetic valve full of all pipelines and probe outer cover, with the air in discharge line；
The ultrasonic signal detected is sent to supersonic reflectoscope by S3, high frequency ultrasound probe, and supersonic reflectoscope will
These ultrasonic signals are converted into ultrasonic reflection waveform figure, and the ultrasonic reflection waveform figure is sent into computer, through computer
The parameters such as nugget thickness, depth of cup, ultrasonic attenuation coefficient, nugget size needed for being obtained after processing, reevaluate these parameters
Show that quality of welding spot is reported；
When S4, the next solder joint of progress are detected, repeat step S1, control circuit passes through Control water pump and magnetic valve
Breakdown action is performed, couplant is full of probe outer cover, then repeat step S3；
S5, repeat step S4, until completing the quality testing of remaining solder joint.
By above-mentioned technical proposal, the step S2 is specially：Control circuit first passes through Control water pump and performs unlatching
Action, the now P mouths of magnetic valve and T mouthfuls of connections, couplant is flowed back in tank through T mouthfuls again by tank through water pump into P mouthfuls；Control
Circuit performs breakdown action by Control magnetic valve again, and now the P mouths of magnetic valve are connected with A mouthfuls, and T mouthfuls are connected with B mouthfuls,
Couplant is first flowed into probe outer cover by inlet opening again through P mouthfuls and A mouthfuls, then flows back to water through B mouthfuls and T mouthfuls again by fluid hole
In groove, until couplant is full of all pipelines and probe outer cover, after the air in pipeline is completely exhausted out.
The beneficial effect comprise that：1st, the couplant pipeline formation circulation loop of the device, it is ensured that couplant can
Recycle, measured workpiece and working environment will not be polluted, cost is reduced；2nd, the device uses at least one detection probe machine
Structure, the quality of multiple solder joints can be detected simultaneously as needed, and efficiency high, reaction speed is fast；3rd, the device is by controlling circuit real
Existing full process automatization detection, it is easy to operate；4th, couplant is liquid, and solder joint is directly contacted with couplant, brilliant in probe outer cover
All the air gaps can be coupled agent filling between piece and solder joint, can detect the weldering that impression is irregular, jagged, plate face is uneven
Point, strong adaptability；5th, the ultrasound examination of local immersion method avoids the interference of machinery and human factor, ripe ultrasonic wave inspection
Survey technology make it that its accuracy of detection is high, highly reliable；6th, consumable accessory-ultrasonic probe chip has delay block protection, not cracky.This
Invention can meet being required for large-scale automotive bobdy sheet metal point quality online automatic detection.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the structural scheme of mechanism for controlling circuit.
In figure：1- magnetic valves, 2- pipelines, 3- water pumps, 4- tanks, 5- supersonic reflectoscopes, 6- computers, 7- high frequency ultrasounds
Probe, 8- delay blocks, 9- probe outer cover, 901- inlet openings, 902- fluid holes, 10- thin plates to be measured, 11- three-way connections, 12- are treated
Survey solder joint.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
As shown in figure 1, a kind of the cannot-harm-detection device of automatic detection thin plate point quality, the device includes：Control circuit,
Couplant injecting mechanism, at least one detection probe mechanism and quality evaluation mechanism；
Couplant injecting mechanism includes tank 4, water pump 3 and magnetic valve 1, and control circuit passes through the He of Control water pump 3
Magnetic valve 1 performs opening and closing action, and magnetic valve 1 includes tetra- mouths of A, B, P, T, and the P mouths of magnetic valve 1 pass through pipeline and water pump
3 connections, water pump 3 is connected by pipeline with tank 4, and the T mouths of magnetic valve 1 are connected by pipeline with tank 4, and coupling is contained in tank 4
Mixture；
Detection probe mechanism includes being provided with delay block on high frequency ultrasound probe 7 and probe outer cover 9, high frequency ultrasound probe 7
8, high frequency ultrasound probe 7 is arranged in probe outer cover 9, and probe outer cover 9 is provided with inlet opening 901 and fluid hole 902, inlet opening
901 are connected by pipeline with the A mouths of magnetic valve 1, and fluid hole 901 is connected by pipeline with the B mouths of magnetic valve 1, probe outer cover with
Thin plate at solder joint to be measured is tightly connected；
Quality evaluation mechanism includes supersonic reflectoscope 5 and computer 6, and supersonic reflectoscope 5 connects with high frequency ultrasound probe 7
Connect, computer 6 is connected with supersonic reflectoscope 5.
In a preferred embodiment of the invention, as shown in Fig. 2 control circuit include PLC, three self-resetting switch (K1,
K2, K3) and two relays (KA1, KA2), PLC input is connected with three self-resetting switch respectively, PLC output end point
It is not connected with two relays.
In a preferred embodiment of the invention, the wafer diameter of high frequency ultrasound probe is equal to the minimum nugget of thin plate to be measured
Diameter.
In a preferred embodiment of the invention, probe outer cover is transparent with machine plastics by being made, be easy to observe the device with
Pad localization situation, does precision adjustment, and organic plastics not cracky.
In a preferred embodiment of the invention, rubber ring is installed between probe outer cover 9 and thin plate to be measured 10, specifically,
The rubber ring sticks to probe outer cover bottom, relatively thin, plays sealed coupling agent, moreover it is possible to strengthen the device to out-of-flatness plane
Adaptability.
In a preferred embodiment of the invention, as shown in figure 1, the inlet opening 901 and fluid hole 902 of probe outer cover 9 are
The cylindrical hole of outwardly convex, is easy to the access of rubber water pipe, also beneficial to the clamping of manipulator.
In a preferred embodiment of the invention, as shown in figure 1, pipeline 2 is rubber tube.
Accordingly, as shown in figure 1, the present invention also provides a kind of lossless detection method of automatic detection thin plate point quality,
Comprise the following steps：
S1, above-mentioned device carried out matching positioning with solder joint 12 to be measured, probe outer cover 9 is placed on solder joint 12 to be measured
Place, applies pressure at right angle and compresses probe outer cover 9 with thin plate 10 to be measured, and ensure the wafer plane of high frequency ultrasound probe 7 with treating
The plate face for surveying thin plate 10 is parallel；
S2, control circuit perform breakdown action by Control water pump 3 and magnetic valve 1, make couplant in water pump 3
Effect is lower to be full of all pipelines 2 and probe outer cover 9 by magnetic valve 1, with the air in discharge line；
The ultrasonic signal detected is sent to supersonic reflectoscope 5, supersonic reflectoscope 5 by S3, high frequency ultrasound probe 7
These ultrasonic signals are converted into ultrasonic reflection waveform figure, and the ultrasonic reflection waveform figure is sent to computer 6, are computed
The parameters such as nugget thickness, depth of cup, ultrasonic attenuation coefficient, nugget size needed for being obtained after the processing of machine 6, reevaluate these ginsengs
Number show that quality of welding spot is reported；
When S4, the next solder joint of progress are detected, repeat step S1, control circuit passes through Control water pump 3 and electromagnetism
Valve 1 performs breakdown action, couplant is full of probe outer cover 9, then repeat step S3；
S5, repeat step S4, until completing the quality testing of remaining solder joint.
In a preferred embodiment of the invention, as shown in figure 1, step S2 is specially：Control circuit first passes through relay control
Water pump processed performs breakdown action, now the P mouths of magnetic valve and T mouthfuls of connections, and couplant enters P mouthfuls again through T mouthfuls by tank through water pump
Flow back in tank；Circuit is controlled to perform breakdown action by Control magnetic valve again, now the P mouths of magnetic valve connect with A mouthfuls
Logical, T mouthfuls are connected with B mouthfuls, and couplant is first flowed into probe outer cover by inlet opening again through P mouthfuls and A mouthfuls, then by fluid hole again
Flowed back to through B mouthfuls and T mouthfuls in tank, until the air in pipeline is completely exhausted out by couplant full of all pipelines and probe outer cover
Afterwards.
As shown in Figure 1 and Figure 2, in specific application, such as the spot welding to 1mm+1mm dual phase sheet steels DP590 is carried out the present invention
Quality testing, the device of use includes magnetic valve 1, rubber tubing, micro pump, tank 4, supersonic reflectoscope 5, computer
6th, wafer diameter 4mm high frequency ultrasound probe 7, delay block 8, probe outer cover 9 and three-way connection 11, are pacified by Fig. 1 annexation
Install the device；
During original state, couplant-antirust solution is filled with tank 4, supersonic reflectoscope 5, computer 6 is opened, high frequency surpasses
The detection probe mechanism that sonic probe 7, delay block 8, probe outer cover 9 are constituted is in running order, is popped one's head in using manipulator clamping
Outer cover is navigated on solder joint 12, is applied pressure at right angle and is compressed, wafer plane and the plate face keeping parallelism of high frequency ultrasound probe 7；
PLC is opened, K1, K2, K3 are three self-resetting switch, get an electric shock and disconnect in non-action position, press switch K1, PLC
Electric on input current I0.0, the upper electricity of trigger output circuit Q0.0 connects relay KA1, micro pump start-up operation, antirust solution by
P, T mouth of the tank 4 through rubber tubing and magnetic valve 1 is flowed back in tank, forms circulation loop, presses switch K2, input circuit
Electricity on the upper electricity of I0.1, trigger output circuit Q0.1, connects after relay KA2, PLC control magnetic valve YV energizations 10s, disconnects electromagnetism
Valve circuit, during magnetic valve connects commutation, P, A mouthfuls of connections, B, mouth T are connected, and antirust solution flows into probe outer cover 9 through rubber tubing
It is interior, coupling is played, unnecessary antirust solution is flowed back in tank 4 for B, T mouthfuls through magnetic valve, also form circulation loop, be easy to coupling
Agent recycling, this stage is water route initial phase, it is therefore an objective to allow coupling liquid to flow through whole rubber tubing and probe is outer
Cover, with the air in purging line, continues to press electricity on electricity on switch K3, input circuit I0.1, trigger output circuit Q0.1, connects
After logical relay KA2, PLC control magnetic valve YV energizations 1s, couplant disconnects electromagnetic valve circuit full of probe outer cover 9；
Detection probe mechanism starts working, and the ultrasonic reflection waveform of solder joint occurs on supersonic reflectoscope 5, removes detection and visits
Head mechanism, this oscillogram is real-time transmitted in computer 6 by network interface with the form of picture, the software processing write is utilized
Figure, parameter needed for obtaining further evaluates these parameters, obtains nugget thickness, depth of cup, ultrasonic attenuation coefficient, nugget
The evaluation indexes such as diameter, finally assess these evaluation indexes, and the quality testing situation of this solder joint is provided by computer, and preserve
Into software；
Next solder joint is positioned, presses on switch K3, supersonic reflectoscope and oscillogram occurs, imported into computer and carry out
Processing, evaluates quality of welding spot, so repeatedly, until having detected all solder joints, presses switch K1, closes micro pump, three connect
First 11 can shunt to the couplant in rubber tubing so that antirust solution is simultaneously filled with two probe outer covers, while completing two
The quality testing of individual solder joint, can also change three-way connection into multiple-pass joint, realize the synchronous online quality control of multiple solder joints, significantly
Improve detection efficiency.
The beneficial effect comprise that：1st, the couplant pipeline formation circulation loop of the device, it is ensured that couplant can
Recycle, measured workpiece and working environment will not be polluted, cost is reduced；2nd, the device uses at least one detection probe machine
Structure, the quality of multiple solder joints can be detected simultaneously as needed, and efficiency high, reaction speed is fast；3rd, the device is by controlling circuit real
Existing full process automatization detection, it is easy to operate；4th, couplant is liquid, and solder joint is directly contacted with couplant, brilliant in probe outer cover
All the air gaps can be coupled agent filling between piece and solder joint, can detect the weldering that impression is irregular, jagged, plate face is uneven
Point, strong adaptability；5th, the ultrasound examination of local immersion method avoids the interference of machinery and human factor, ripe ultrasonic wave inspection
Survey technology make it that its accuracy of detection is high, highly reliable；6th, consumable accessory-ultrasonic probe chip has delay block protection, not cracky.This
Invention can meet being required for large-scale automotive bobdy sheet metal point quality online automatic detection.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (9)
1. a kind of the cannot-harm-detection device of automatic detection thin plate point quality, it is characterised in that the device includes：Control circuit,
Couplant injecting mechanism, at least one detection probe mechanism and quality evaluation mechanism；
The couplant injecting mechanism includes tank, water pump and magnetic valve, the control circuit by Control water pump and
Magnetic valve performs opening and closing action, and the magnetic valve includes tetra- mouths of A, B, P, T, and the P mouths of the magnetic valve pass through pipeline
It is connected with water pump, the water pump is connected by pipeline with tank, the T mouths of the magnetic valve are connected by pipeline with tank, described
Couplant is contained in tank；
The detection probe mechanism includes being provided with delay on high frequency ultrasound probe and probe outer cover, the high frequency ultrasound probe
Block, the high frequency ultrasound probe is arranged in probe outer cover, and the probe outer cover is provided with inlet opening and fluid hole, the feed liquor
Hole is connected by the A mouths of pipeline and magnetic valve, and the fluid hole is connected by the B mouths of pipeline and magnetic valve, the probe outer cover
It is tightly connected with the thin plate at solder joint to be measured；
The quality evaluation mechanism includes supersonic reflectoscope and computer, and the supersonic reflectoscope connects with high frequency ultrasound probe
Connect, the computer is connected with supersonic reflectoscope.
2. device according to claim 1, it is characterised in that the control circuit include PLC, three self-resetting switch and
Two relays, the input of the PLC is connected with three self-resetting switch respectively, the output end of the PLC respectively with two
Relay is connected.
3. device according to claim 1, it is characterised in that the wafer diameter of the high frequency ultrasound probe is equal to be measured thin
Plate minimum dot weld nugget diameter.
4. device according to claim 1, it is characterised in that the probe outer cover transparent with machine plastics by being made.
5. device according to claim 1, it is characterised in that be provided with rubber between the probe outer cover and thin plate to be measured
Circle.
6. device according to claim 1, it is characterised in that the inlet opening and fluid hole of the probe outer cover are outwards
Raised cylindrical hole.
7. device according to claim 1, it is characterised in that the pipeline is rubber tube.
8. a kind of lossless detection method of automatic detection thin plate point quality, comprises the following steps：
S1, the device described in claim 1 and solder joint to be measured carried out to match positioning, probe outer cover is placed on solder joint to be measured
Place, applies will pop one's head in outer cover and thin plate to be measured of pressure at right angle and compresses, and ensure the wafer plane of high frequency ultrasound probe with it is to be measured thin
The plate face of plate is parallel；
S2, control circuit perform breakdown action by Control water pump and magnetic valve, make couplant in the presence of water pump
By magnetic valve full of all pipelines and probe outer cover, with the air in discharge line；
The ultrasonic signal detected is sent to supersonic reflectoscope by S3, high frequency ultrasound probe, supersonic reflectoscope by these
Ultrasonic signal is converted into ultrasonic reflection waveform figure, and the ultrasonic reflection waveform figure is sent into computer, is handled through computer
Nugget thickness, depth of cup needed for obtaining afterwards, ultrasonic attenuation coefficient, nugget size parameter, reevaluate these parameters and draw weldering
Point mass is reported；
When S4, the next solder joint of progress are detected, repeat step S1, control circuit passes through Control water pump and magnetic valve is performed
Breakdown action, makes couplant be full of probe outer cover, then repeat step S3；
S5, repeat step S4, until completing the quality testing of remaining solder joint.
9. method according to claim 8, it is characterised in that the step S2 is specially：Control circuit first passes through relay
Device control water pump performs breakdown action, now the P mouths of magnetic valve and T mouthfuls of connections, and couplant is passed through again by tank through water pump into P mouthfuls
T mouthfuls flow back in tank；Control circuit again by Control magnetic valve perform breakdown action, now P mouths of magnetic valve with A mouthfuls
Connect, T mouthfuls are connected with B mouthfuls, couplant is first flowed into probe outer cover by inlet opening again through P mouthfuls and A mouthfuls, then passes through fluid hole
Flowed back to again through B mouthfuls and T mouthfuls in tank, until couplant arranges the air in pipeline full of all pipelines and probe outer cover completely
After going out.
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| CN201510099819.2A CN104677990B (en) | 2015-03-06 | 2015-03-06 | A kind of the cannot-harm-detection device and method of automatic detection thin plate point quality |
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| CN104677990B true CN104677990B (en) | 2017-07-11 |
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| CN105181802B (en) * | 2015-10-09 | 2017-09-15 | 湖南湖大艾盛汽车技术开发有限公司 | A kind of one master and multiple slaves portable supersonic solder joint detection device |
| CN106124624A (en) * | 2016-06-17 | 2016-11-16 | 武汉理工大学 | A kind of thin plate point quality automatic detection device and method |
| CN106643591B (en) * | 2016-12-12 | 2018-11-09 | 大连理工大学 | The thin-wall part adaptively adjusted pop one's head in machine ultrasonic thickness-measuring method |
| CN107525481B (en) * | 2017-08-18 | 2020-03-13 | 中国航发贵州黎阳航空动力有限公司 | Ultrasonic detection device and method for plug welding point |
| CN107727739A (en) * | 2017-10-12 | 2018-02-23 | 吉林大学 | Point quality fully-automatic supersonic non-destructive detecting device and method |
| CN107967004A (en) * | 2017-11-27 | 2018-04-27 | 四川共享铸造有限公司 | A kind of UT probes of energy stability contorting dynamics |
| CN109187753A (en) * | 2018-10-15 | 2019-01-11 | 吉林大学 | The supersonic detection device of face bonding fitting |
| CN112098517B (en) * | 2020-09-30 | 2021-06-29 | 吉林大学 | Detection device and method for detecting friction stir spot welding by using composite ultrasonic |
| CN112461928A (en) * | 2020-11-17 | 2021-03-09 | 广州多浦乐电子科技股份有限公司 | Automatic detection device for ultrasonic phased array on surface of workpiece |
| CN113866266A (en) * | 2021-08-27 | 2021-12-31 | 四川航天川南火工技术有限公司 | Ultrasonic detection method for debonding defect of initiating explosive device cylindrical thin shell adhesive assembly |
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