CN110006998B - Detection system and detection method for detecting welding seam of hollow pipe fitting - Google Patents
Detection system and detection method for detecting welding seam of hollow pipe fitting Download PDFInfo
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- CN110006998B CN110006998B CN201910337231.4A CN201910337231A CN110006998B CN 110006998 B CN110006998 B CN 110006998B CN 201910337231 A CN201910337231 A CN 201910337231A CN 110006998 B CN110006998 B CN 110006998B
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- 238000003466 welding Methods 0.000 title claims abstract description 78
- 238000001514 detection method Methods 0.000 title claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims abstract description 4
- 230000007547 defect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 8
- 238000002592 echocardiography Methods 0.000 claims description 6
- 230000005855 radiation Effects 0.000 abstract description 5
- 239000007822 coupling agent Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009658 destructive testing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
-
- 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
- G01N29/048—Marking the faulty 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
- G01N29/22—Details, e.g. general constructional or apparatus details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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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
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
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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
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
Abstract
The invention discloses a detection system for detecting a welding seam of a hollow pipe fitting, which comprises a fixing device, an ultrasonic transmitting and receiving device, a rotating device and a signal analysis device, wherein the fixing device is arranged on a detection platform; the ultrasonic transmitting and receiving device comprises a laser generator and an ultrasonic signal receiving mechanism for receiving the laser ultrasonic echo signal; the rotating device is used for driving the ultrasonic transmitting and receiving device to rotate 360 degrees at a set speed around the circumference of the pipe fitting to be detected for the quality of the welding seam, the rotating device drives the ultrasonic transmitting and receiving device to rotate 360 degrees around the circumference of the pipe fitting to be detected for the quality of the welding seam at a set angle and distance, and a base of the rotating device is arranged on the detection table; the signal analysis device is in communication connection with the ultrasonic signal receiving mechanism. The invention can realize non-contact flaw detection of the welding seam without removing welding seam flash, has no radiation, does not need a coupling agent, has high detection efficiency and high flaw detection speed, and is suitable for automatic detection of batch parts.
Description
Technical Field
The invention relates to the technical field of laser ultrasonic detection, in particular to a detection system and a detection method for detecting a welding seam of a hollow pipe fitting.
Background
The light weight is an important trend in the design and manufacture of automobile parts, and on one hand, a new structure, such as a hollow pipe fitting, is used for replacing a solid rod; secondly, new materials, such as cast aluminum or cast steel, are used to replace the forged steel; in addition, new joining processes such as magnetic arc welding and friction welding are used instead of conventional arc welding. Compared with the traditional arc welding, the magnetic arc welding and the friction welding of the hollow tube can obviously improve the welding efficiency and the quality stability, in addition, welding wires are not needed to be added in the welding process, the welding automation degree is high, and the operation requirement on workers is lower, so the magnetic arc welding and the friction welding are widely applied to the field of automobile part manufacturing.
Although the welding quality stability of magnetic arc welding and friction welding is high, post-welding quality inspection is still required. The traditional method is to perform destructive testing according to batch sampling, has certain randomness and higher cost, and needs to destroy welding pieces.
In order to avoid destructive testing in the prior art, developers developed a reliable non-destructive testing method for detecting internal defects of welds, such as X-ray, ultrasonic flaw detection, and the like. However, the welding seam joint positions of magnetic arc welding and friction welding have obvious welding flashes, the flashes on the outer surface of the welding seam are required to be milled by using common ultrasonic testing, the manufacturing cost is increased, the detection process is extremely easy to be influenced by the flashes on the inner wall of the pipe, and the detection accuracy is reduced; in addition, although the defects inside the weld joint can be accurately detected by the X-ray, the defects at the flash position may interfere with the inspection and judgment of the quality inside the weld joint due to the fact that the defects cannot be directly detected on site due to the X-ray radiation, and great inconvenience is brought to the detection work of the weld joint.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide the detection system and the detection method for detecting the welding seam of the hollow pipe fitting, which have the advantages of reasonable design, simple structure, convenient operation, no radiation, no need of a coupling agent, high detection efficiency and high detection speed, can realize non-contact type detection of the welding seam under the condition of not removing the welding seam flash, and are suitable for automatic detection of batch parts.
In order to solve the technical problems, the invention adopts the following technical scheme:
a detecting system for detecting a welding seam of a hollow pipe fitting is characterized by comprising
The fixing device is used for fixing the pipe fitting to be detected for the quality of the welding seam, and is arranged on the detection platform;
the ultrasonic transmitting and receiving device comprises a laser generator for transmitting laser ultrasonic waves and an ultrasonic signal receiving mechanism for receiving laser ultrasonic wave echo signals;
the rotating device is used for driving the ultrasonic transmitting and receiving device to rotate 360 degrees around the circumference of the pipe fitting to be detected for the quality of the welding seam at a set speed, the rotating device drives the ultrasonic transmitting and receiving device to rotate 360 degrees around the circumference of the pipe fitting to be detected for the quality of the welding seam at a set angle and distance, and a base of the rotating device is arranged on the detection table;
and the signal analysis device is in communication connection with the ultrasonic signal receiving mechanism.
In a preferred embodiment of the invention, the set speed is 4 r/min.
In a preferred embodiment of the invention, the set angle is 20-40 ° and the set distance is 100-200mm °.
In a preferred embodiment of the invention, the set angle is 32 ° and the set distance is 120 mm.
The invention also provides a detection method for detecting the welding seam of the hollow pipe fitting, and the detection system comprises the following steps
1) Fixing the pipe fitting to be detected for the quality of the welding line on a fixing device;
2) starting the ultrasonic transmitting and receiving device and the rotating device;
in the process that the rotating device drives the ultrasonic transmitting and receiving device to rotate, a laser generator of the ultrasonic transmitting and receiving device transmits laser ultrasonic waves along a set angle and distance, the laser ultrasonic waves are decomposed into transmitting waves and refracted waves after contacting with a pipe fitting, the transmitting waves are reflected to the air to disappear, the refracted waves are transmitted to the direction of a welding seam along the axial direction of the inner wall of the pipe, and are reflected back when meeting the defect of the welding seam to form laser ultrasonic echoes, and the laser ultrasonic echoes return along a path opposite to the refracted waves;
3) the ultrasonic signal receiving device receives a laser ultrasonic echo signal through a laser ultrasonic detection head;
4) the ultrasonic signal receiving device sends the received laser ultrasonic echo signal to the signal analysis device for analysis, and finally welding seam information is obtained to judge the quality of the inside of the welding seam.
In a preferred embodiment of the invention, the weld defect has a diameter of not less than 0.2 mm.
Compared with the prior art, when the invention detects the welding seam of the pipe welded by the magnetic arc welding or the friction welding, the pipe is firstly fixed by the fixing device, the rotating device drives the ultrasonic transmitting and receiving device to rotate 360 degrees at a set speed, in the rotating process, a laser generator of the ultrasonic transmitting and receiving device transmits laser ultrasonic waves along a set angle and distance, the laser ultrasonic waves are decomposed into transmitting waves and refracted waves after contacting the pipe, wherein the transmitting waves are reflected to the air to disappear, the refracted waves are transmitted to the welding seam direction along the axial direction of the inner wall of the pipe and are reflected back when meeting the defect of the welding seam to form laser ultrasonic wave echo, the laser ultrasonic wave echo returns along a path opposite to the refracted waves, the ultrasonic signal receiving device receives the laser ultrasonic wave echo signals through the laser ultrasonic detecting head, and the ultrasonic signal receiving device sends the received laser ultrasonic echo signals to the signal analyzing device for analysis, the structure can realize non-contact flaw detection of the welding seam without radiation and coupling agent, improves the detection efficiency of the detection system, and is suitable for automatic detection of batch parts.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram after the laser ultrasonic wave is emitted.
FIG. 2 is a schematic diagram of a structure for receiving a laser ultrasonic echo according to the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Referring to fig. 1 and 2, a detection system for detecting a weld of a hollow pipe fitting is provided, which comprises a fixing device, an ultrasonic transmitting and receiving device 100, a rotating device and a signal analyzing device.
The fixing device is used for fixing the pipe fitting 300 to be detected with the quality of the welding seam 310, the fixing device is arranged on the detection table, and the ultrasonic transmitting and receiving device 100 comprises a laser generator 110 used for transmitting laser ultrasonic waves and an ultrasonic signal receiving mechanism 120 used for receiving laser ultrasonic wave echo signals.
The rotating device is used for driving the ultrasonic transmitting and receiving device 100 to rotate 360 degrees around the circumference of the pipe fitting to be detected in the quality of the welding line at a set speed, the rotating device drives the ultrasonic transmitting and receiving device 100 to rotate 360 degrees around the circumference of the pipe fitting to be detected in the quality of the welding line 310 at a set angle theta and a set distance d, the base of the rotating device is arranged on the detection table, the signal analyzing device is in communication connection with the ultrasonic signal receiving mechanism, and the structure is adopted so that the welding line of the pipe fitting can be uniformly detected all around.
The set speed 4r/min, the set angle theta is 20-40 degrees, the set distance d is 100-200mm, the angle theta is 32 degrees in the embodiment, the set distance d is 120mm, the specific angle and distance can be determined according to the actual material of the pipe fitting, and the refracted wave is ensured to be transmitted to the welding seam direction along the axial direction of the inner wall of the pipe.
The invention also provides a detection method for detecting the welding seam of the hollow pipe fitting, and the detection system comprises the following steps
1) Fixing the pipe fitting 300 to be detected with the quality of the welding seam 310 on a fixing device;
2) starting the ultrasonic transmitting and receiving device 100 and the rotating device;
in the process that the rotating device drives the ultrasonic transmitting and receiving device 100 to rotate, a laser generator 110 of the ultrasonic transmitting and receiving device 100 transmits laser ultrasonic waves 400 along a set angle and distance, the laser ultrasonic waves are decomposed into transmitted waves 500 and refracted waves 600 after contacting the pipe fitting 300, the transmitted waves 500 are reflected to the air and disappear, the refracted waves 600 are transmitted to the direction of a welding seam along the axial direction of the inner wall of the pipe fitting 300 and are reflected when meeting a welding seam defect 311 of the welding seam 310, the diameter of the welding seam defect 311 for detection is not less than 0.2mm, a laser ultrasonic echo 700 is formed, and the laser ultrasonic echo 700 returns along a path opposite to the refracted waves 600;
3) the ultrasonic signal receiving device 120 receives the laser ultrasonic echo 700 signal through the laser ultrasonic detection head;
4) the ultrasonic signal receiving device 120 sends the received laser ultrasonic echo 700 signal to a signal analyzing device for analysis, and finally obtains weld information to determine the quality of the inside of the weld.
The specific detection method of the invention is as follows:
when detecting the welding seam 310 of the pipe 300 welded by magnetic arc welding or friction welding, firstly fixing the pipe 300 by a fixing device, the rotating device drives the ultrasonic transmitting and receiving device 100 to rotate 360 degrees at a set speed, in the rotating process, the laser generator 110 of the ultrasonic transmitting and receiving device 100 transmits laser ultrasonic waves 400 along a set angle and distance, after contacting the pipe 300, the laser ultrasonic waves are decomposed into transmitted waves 500 and refracted waves 600, wherein the transmitted waves 500 are reflected to the air to disappear, the refracted waves 600 are transmitted to the direction of the welding seam 310 along the axial direction of the inner wall of the pipe 300, and when encountering a welding seam defect 311, laser ultrasonic echoes 700 are formed, the laser ultrasonic echoes 700 return along a path opposite to the refracted waves 600, the ultrasonic signal receiving device 120 receives laser ultrasonic echo 700 signals through a laser ultrasonic detecting head, and the ultrasonic signal receiving device 120 sends the received laser ultrasonic echo 700 signals to a signal analyzing device for analysis, and finally, obtaining welding seam information to judge the quality of the interior of the welding seam.
In conclusion, the invention can realize non-contact flaw detection of the welding seam without removing welding seam flash, has no radiation and does not need a coupling agent, improves the detection efficiency of the detection system, and is suitable for automatic detection of batch parts.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A detecting system for detecting a welding seam of a hollow pipe fitting is characterized by comprising
The fixing device is used for fixing the pipe fitting to be detected for the quality of the welding seam, and is arranged on the detection platform;
the ultrasonic transmitting and receiving device comprises a laser generator for transmitting laser ultrasonic waves and an ultrasonic signal receiving mechanism for receiving laser ultrasonic wave echo signals;
the rotating device is used for driving the ultrasonic transmitting and receiving device to rotate 360 degrees around the circumference of the pipe fitting to be detected for the quality of the welding line at a set speed, the set speed is 4r/min, the rotating device drives the ultrasonic transmitting and receiving device to rotate 360 degrees around the circumference of the pipe fitting to be detected for the quality of the welding line at a set angle and distance, the set angle is 20-40 degrees, the set distance is 100-200mm, and a base of the rotating device is arranged on the detection platform;
and the signal analysis device is in communication connection with the ultrasonic signal receiving mechanism.
2. A detection system for detecting a weld of a hollow pipe according to claim 1, wherein: the set angle is 32 deg., and the set distance is 120 mm.
3. A detection method for detecting a weld of a hollow pipe fitting, using the laser ultrasonic detection system for detecting a weld according to claim 1, comprising the steps of:
1) fixing the pipe fitting to be detected for the quality of the welding line on a fixing device;
2) starting the ultrasonic transmitting and receiving device and the rotating device;
in the process that the rotating device drives the ultrasonic transmitting and receiving device to rotate, a laser generator of the ultrasonic transmitting and receiving device transmits laser ultrasonic waves along a set angle and distance, the laser ultrasonic waves are decomposed into transmitting waves and refracted waves after contacting with a pipe fitting, the transmitting waves are reflected to the air to disappear, the refracted waves are transmitted to the direction of a welding seam along the axial direction of the inner wall of the pipe, and are reflected back when meeting the defect of the welding seam to form laser ultrasonic echoes, and the laser ultrasonic echoes return along a path opposite to the refracted waves;
3) the ultrasonic signal receiving device receives a laser ultrasonic echo signal through a laser ultrasonic detection head;
4) the ultrasonic signal receiving device sends the received laser ultrasonic echo signal to the signal analysis device for analysis, and finally welding seam information is obtained to judge the quality of the inside of the welding seam.
4. A method for detecting a weld of a hollow pipe according to claim 3, characterized in that: the diameter of the weld defect is not less than 0.2 mm.
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| CN201910337231.4A CN110006998B (en) | 2019-04-25 | 2019-04-25 | Detection system and detection method for detecting welding seam of hollow pipe fitting |
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| CN201910337231.4A CN110006998B (en) | 2019-04-25 | 2019-04-25 | Detection system and detection method for detecting welding seam of hollow pipe fitting |
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| CN110006998B true CN110006998B (en) | 2021-10-26 |
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| CN111239243A (en) * | 2020-01-20 | 2020-06-05 | 南京大学 | Nondestructive testing method for longitudinal defects of small-caliber thin-walled tube based on laser ultrasound and circumferential guided wave |
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Effective date of registration: 20211009 Address after: 211403 room 218, science and technology building, Dazhong square, Yizheng Automobile Industrial Park, Yangzhou City, Jiangsu Province Applicant after: YANGZHOU DONGSHENG AUTOMOBILE PARTS LIMITED BY SHARE Ltd. Address before: 201620 No. 333, Longteng Road, Songjiang District, Shanghai Applicant before: SHANGHAI University OF ENGINEERING SCIENCE |
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Denomination of invention: A detection system and method for detecting welds in hollow pipe fittings Effective date of registration: 20231211 Granted publication date: 20211026 Pledgee: Yangzhou Branch of Zheshang Bank Co.,Ltd. Pledgor: YANGZHOU DONGSHENG AUTOMOBILE PARTS LIMITED BY SHARE Ltd. Registration number: Y2023980070690 |