CN111077158A - Macroscopic metallographic shooting and analyzing device for pipeline ring weld joint and using method thereof - Google Patents
Macroscopic metallographic shooting and analyzing device for pipeline ring weld joint and using method thereof Download PDFInfo
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Abstract
The invention discloses a macroscopic metallographic shooting and analyzing device for a pipeline ring weld joint and a using method thereof.A picture collecting device is fixed on a fixed frame, a focusing knob and a magnification adjusting knob are arranged on the picture collecting device, a soft light illuminating system is arranged on the outer ring of the bottom end of a lens of the picture collecting device, and a measuring scale is arranged at the position of the fixed frame for placing a weld joint sample to be detected; the image acquisition device is used for acquiring image information of a welding seam sample to be detected, the acquired image information is sent to the image processing module, the image processing module is used for carrying out brightness adjustment, contrast enhancement processing and welding seam fusion line outline extraction on the received image information, the processed image information is sent to the image measurement module, and the image measurement module is used for measuring the defect size in the welding seam. The invention can quickly obtain the high-quality macroscopic metallographic picture of the circumferential weld, can directly carry out detection measurement on the size of the defect in the welded joint and the like, and has accurate and reliable detection result.
Description
Technical Field
The invention belongs to the field of weld metallographic detection, and particularly relates to a macroscopic metallographic shooting and analyzing device for a weld of a pipeline ring and a using method thereof.
Background
As an economical, safe and continuous transportation method, long-distance pipelines have been widely used for the transportation of oil, natural gas and liquid ore pulp. For long-distance oil and gas transmission pipeline projects, steel pipes are usually connected by adopting a field welding mode (butt girth welding). Due to the existence of the girth welding seam, the integrity of the long-distance pipeline structure is damaged, and the pipeline failure accidents are frequent. Therefore, pipeline owners, construction parties, and the quality and process of welding the wire loop welds are receiving increasing attention.
A macroscopic metallographic analysis test of a girth welded joint is a means for evaluating a welding process and welding quality. In GB/T31032-2014 Steel pipe welding and acceptance and Q/SYGD 0503.12-2012 China Russian east line Natural gas pipe engineering Specification part 12: in standards such as line welding, macroscopic metallographic analysis of a circumferential weld is clearly specified. The macroscopic metallographic analysis of the circumferential weld joint generally comprises the steps of detecting the fusion condition of the weld joint and whether welding defects exist through naked eyes or a magnifying lens; because the circumferential weld of the high-steel-grade thick-wall pipeline adopts multi-pass welding, in order to evaluate whether the actual welding process is consistent with the welding process procedure, the welding pass needs to be inspected and analyzed.
In laboratory inspection, because no proper macroscopic metallographic photographing device is available, testers often use mobile phones or digital cameras to photograph, the light source conditions are poor, and the image quality is uneven; if macroscopic weld defects are found in a sample, the defects are often quantitatively measured and described, and the size of the defects is also measured by means of an optical metallographic microscope. Therefore, the macroscopic metallographic picture of the circumferential weld obtained by the prior art has poor quality and inaccurate result; when welding defects exist, analysis is sometimes carried out by means of an optical microscope, which is time-consuming and labor-consuming.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a macroscopic metallographic shooting and analyzing device for a pipeline ring weld joint and a using method thereof, which can quickly obtain a high-quality macroscopic metallographic picture of the ring weld joint, and the weld joint has clear and attractive appearance; the size of the defect in the welding joint can be directly inspected and measured; and welding passes in the circumferential weld can be automatically identified and detected, and the detection result is accurate and reliable.
In order to solve the technical problems, the invention solves the problems by the following technical scheme:
a macroscopic metallographic shooting and analyzing device for a pipeline ring weld joint comprises an image acquisition device, a soft lighting system, a measuring scale, an image processing module and an image measuring module, wherein the image acquisition device is fixed on a fixed frame, a focusing knob and a magnification adjusting knob are arranged on the image acquisition device, the soft lighting system is arranged on the outer ring of the bottom end of a lens of the image acquisition device, and the measuring scale is arranged at a position on the fixed frame for placing a weld joint sample to be detected; the image acquisition device is used for acquiring image information of a weld joint sample to be detected and sending the acquired image information to the image processing module, the image processing module is used for carrying out brightness adjustment, contrast enhancement processing and weld joint fusion line outline extraction on the received image information and sending the processed image information to the image measurement module, and the image measurement module is used for measuring the defect size in the weld joint.
Further, the soft lighting system includes lamp shade, a plurality of LED lamp and soft panel, and is a plurality of the LED lamp equipartition is in the lamp shade, the soft panel sets up at the lamp shade end.
Furthermore, a brightness adjusting knob is further arranged on the soft lighting system and used for adjusting the brightness of the lamp light.
Further, the mount includes base, branch and L shape support frame, the one end of branch is connected on the base, a pot head of L shape support frame is established on the branch, just L shape support frame for branch can slide from top to bottom, the other end of L shape support frame is connected with image acquisition device.
Furthermore, one side of the L-shaped support frame, which is sleeved on the support rod, is provided with a height adjusting knob.
Furthermore, a scale adjusting rod is arranged on the base, and one end of the measuring scale is connected to the scale adjusting rod.
Further, the staff gauge is adjusted the pole and is included L shape pole, a word pole and set screw, a word pole cover is established one side of L shape pole, just a word pole for L shape pole can slide from top to bottom, set screw sets up on the lateral wall of a word pole, measure the staff gauge with a word pole is connected, the spout has been seted up to one side of base, stretching into of the another side of L shape pole in the spout, L shape pole can the horizontal slip in the spout.
Further, the image acquisition device is a digital camera, and the magnification adjusting knob can enable the magnification of the digital camera to be continuously amplified by 1 to 5 times.
And the display is connected with the image processing module and the image measuring module and is used for displaying image information, the size of the welding seam and the size of the defect in the welding seam.
The use method of the macroscopic metallographic shooting and analyzing device for the welding seam of the pipeline ring comprises the following steps:
step 1: placing a pre-processed welding seam sample to be detected on a base, wherein the surface to be detected is upward and the surface to be detected is over against the lower part of a lens of an image acquisition device, and adjusting a measuring scale to be close to the surface of the sample to be detected;
step 2: starting a soft light illumination system, adjusting a focusing knob and a magnification adjusting knob, matching with an adjusting brightness adjusting knob, acquiring image information of a sample to be detected, controlling an image processing module to perform brightness adjustment, contrast enhancement processing and weld fusion line profile extraction on the received image information, and observing whether a weld of the sample to be detected has defects; if the defect exists, executing step 3;
and step 3: adjusting a magnification adjusting knob, amplifying the weld defects of the sample to be detected, placing a measuring scale at the weld defects, collecting image information of the weld defects of the sample to be detected, and controlling an image processing module to perform brightness adjustment, contrast enhancement processing and weld fusion line profile extraction on the received image information of the weld defects;
and 4, step 4: the image measurement module measures the size of the defect in the weld.
Compared with the prior art, the invention has at least the following beneficial effects: according to the macroscopic metallographic shooting and analyzing device for the pipeline ring weld joint, the image acquisition device is fixed on the fixing frame, so that the stability of shooting and acquiring images is ensured; because the surface of the macroscopic metallographic phase of the circumferential weld sample is a smooth structure similar to a mirror surface, when the image is collected by the traditional method, the image quality is uneven because of reflection and the like displayed in the shot image due to the light problem. According to the invention, the soft lighting system is arranged on the outer ring of the bottom end of the lens of the image acquisition device, when images are acquired by photographing, the soft lighting system is started, the problem that the acquired images are not clear, such as image reflection, can be effectively avoided, and the high-quality macroscopic metallographic pictures of the girth welds can be quickly acquired by controlling the adjusting focusing knob and the amplifying magnification adjusting knob and matching with the adjusting brightness adjusting knob, so that the appearance of the welds is clear and beautiful; controlling an image processing module to carry out brightness adjustment, contrast enhancement processing and weld fusion line profile extraction on received image information, if a defect of a weld is observed, rotating an amplification factor adjusting knob to locally amplify the defect position of a sample, simultaneously placing a measuring scale near the defect position of the sample, shooting and collecting the weld defect of a weld macroscopic golden phase diagram by an image collecting device, controlling the image processing module to carry out brightness adjustment, contrast enhancement processing and weld fusion line profile extraction processing on the received weld macroscopic golden phase diagram of the weld defect, calibrating the amplification factor of a defect image in the image measuring module according to the actual size of the measuring scale in the defect image, then operating the image measuring module, directly measuring the defect at the weld fusion line position of the sample to obtain the actual size of the defect, and thus directly carrying out inspection and measurement on the size of the defect in a weld joint, and the image processing module can also automatically identify and inspect the welding pass in the circumferential weld, and the inspection result is accurate and reliable. In conclusion, the device disclosed by the invention is simple in structure and convenient and fast to operate and use, can quickly obtain a high-quality macroscopic metallographic picture of the circumferential weld, can directly carry out detection measurement on the sizes of defects in a welded joint and the like, can automatically identify and detect the welding pass in the circumferential weld, and is accurate and reliable in detection result.
Furthermore, a plurality of LED lamps are uniformly distributed in the soft lighting system and matched with a soft lighting panel with high light transmittance, so that the problem of uneven image quality caused by poor light source conditions can be further solved.
Furthermore, a brightness adjusting knob is arranged on the soft lighting system, and the brightness of the light can be timely and effectively adjusted through the brightness adjusting knob according to different environmental conditions.
Furthermore, the L-shaped support frame can be controlled to slide up and down relative to the support rod by controlling the height adjusting knob, namely, the height of the L-shaped support frame can be adjusted by rotating the height adjusting knob, the image acquisition device is driven to move in the height direction, the amplification ratio and the field size of the acquired image are adjusted, the local amplification of the defect part of the sample is facilitated, and the operability is high.
Further, the one end of measuring the scale is connected on the scale adjusts the pole, according to the sample shape and size that awaits measuring of difference, the accessible control scale adjusts the pole, and then the control measure the scale for the high position of the sample that awaits measuring and the position of horizontal direction for measure near the surface that waits to detect the sample in arranging in that the measurement scale can be nimble, convenient operation reduces the use limitation of device, makes the application scope greatly increased of this device.
Furthermore, the image acquisition device is a digital camera, the magnification adjusting knob can enable the magnification of the digital camera to be continuously amplified by 1 to 5 times, the operation is simple and easy, and high-definition images can be acquired.
Further, the display can show image information, weld size and defect size in the weld, and operating personnel can observe the experimental condition intuitively and clearly.
The use method of the pipeline ring weld macroscopic metallographic photographing and analyzing device is convenient and fast to operate and use, can quickly obtain the high-quality ring weld macroscopic metallographic picture, can directly carry out inspection measurement on the size of a defect in a welded joint and the like, can automatically identify and inspect the welding pass in the ring weld, and is accurate and reliable in inspection result.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the camera and lighting unit of the present invention;
FIG. 3 is a side view of the camera and lighting unit of the present invention;
FIG. 4 is a front view of the base and stand unit of the present invention;
FIG. 5 is a side view of the base and stand unit of the present invention.
In the figure: 1. an image acquisition device; 2. a soft lighting system; 2-1, LED lamps; 2-2, a soft light panel; 3. a focusing knob; 4. a magnification adjusting knob; 5. a brightness adjusting knob; 6. an L-shaped support frame; 7. a height adjustment knob; 8. a strut; 9. a base; 9-1, a chute; 10. a scale adjusting rod; 10-1, an L-shaped rod; 10-2, a linear rod; 10-3, fixing screws; 11. measuring a scale; 12. a data line; 13. detecting a welding seam sample to be detected; 14-1, an image processing module; 14-2, and an image measuring module.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, as a specific embodiment of the present invention, a macroscopic metallographic photographing and analyzing apparatus for a weld of a pipeline ring comprises an image collecting apparatus 1, a soft lighting system 2, a measuring scale 11, an image processing module 14-1, an image measuring module 14-2, and a fixing frame, wherein the image collecting apparatus 1 in the present embodiment adopts a digital camera. Referring to fig. 4 and 5, the fixing frame includes a base 9, a supporting rod 8, a height adjusting knob 7 and an L-shaped supporting frame 6, the base 9 is a plate-shaped base, and a welding seam test sample 13 to be detected is placed on the upper surface of the base 9. One end of the supporting rod 8 is fixedly connected with the base 9, one end of the L-shaped supporting frame 6 is sleeved on the supporting rod 8, one side of the L-shaped supporting frame 6, which is sleeved on the supporting rod 8, is provided with a height adjusting knob 7, the L-shaped supporting frame 6 can be controlled to slide up and down along the supporting rod 8 by adjusting the height adjusting knob 7, and the other end of the L-shaped supporting frame 6 is connected with the bottom of the digital camera. That is to say, the height of the L-shaped support frame 6 can be adjusted by rotating the height adjusting knob 7, and the digital camera is driven to move in the height direction, so that the magnification and the view field size of the collected image can be adjusted.
As shown in fig. 1 and 3, a focusing knob 3 and a magnification adjustment knob 4 are provided on the image capturing device 1, specifically, the focusing knob 3 and the magnification adjustment knob 4 are provided on the outer ring of the lens of the digital camera, and the magnification adjustment knob 4 can continuously magnify the magnification of the digital camera by 1 to 5 times. As shown in fig. 2 and 3, in the present embodiment, the soft lighting system 2 is annular, and has a diameter of 80-100mm, the soft lighting system 2 includes a lampshade, 40-60 LED lamps 2-1, a soft light panel 2-2, and a brightness adjusting knob 5, wherein the 40-60 LED lamps 2-1 are uniformly installed in the lampshade, the soft light panel 2-2 with high light transmittance is installed on the surface of the lampshade, the brightness adjusting knob 5 is located outside the annular lampshade, and the brightness adjusting knob 5 is used for adjusting the brightness of the lamp light.
As shown in fig. 1, 4 and 5, the base 9 is provided with a scale adjustment lever 10, and one end of a measurement scale 11 is connected to the scale adjustment lever 10. Specifically, a sliding groove 9-1 is formed in one side of a base 9, a scale adjusting rod 10 comprises an L-shaped rod 10-1, a linear rod 10-2 and a fixing screw 10-3, the linear rod 10-2 is sleeved on one side of the L-shaped rod 10-1, the fixing screw 10-3 is arranged on the side wall of the linear rod 10-2, the linear rod 10-2 can be controlled to slide up and down relative to the L-shaped rod 10-1 by screwing the fixing screw 10-3, a measuring scale 11 is connected with the linear rod 10-2, and the height of the measuring scale 11 relative to a welding seam sample 13 to be detected is adjusted; the other side of the L-shaped rod 10-1 extends into the sliding groove 9-1, the L-shaped rod 10-1 can slide left and right in the sliding groove 9-1, and the position of the measuring scale 11 relative to the horizontal direction of the welding seam sample 13 to be detected is adjusted. The measuring scale 11 is placed near the surface of the sample 13 to be detected by controlling and adjusting the scale adjusting rod 10.
As shown in figure 1, an image processing module 14-1 is connected with a digital camera through a data line 12, the digital camera is used for shooting and collecting a macroscopic metallographic image of a circumferential weld sample 13 to be detected, the collected image is sent to the image processing module 14-1, the image processing module 14-1 is used for carrying out brightness adjustment, contrast enhancement processing and weld fusion line outline extraction on the received macroscopic metallographic image of the circumferential weld sample, the image is clear and attractive, processed image information is sent to an image measuring module 14-2, and the image measuring module 14-2 is used for measuring the size of a weld and the size of defects in the weld. And the display is connected with the image processing module 14-1 and the image measuring module 14-2 and is used for displaying image information, the size of the welding seam and the size of the defect in the welding seam. In this embodiment, the image processing module 14-1 extracts the weld fusion line by using an edge extraction method or a contour identification method, and is used for identifying the pass condition of the welding in the inspection circumferential weld.
In a specific embodiment, the use method of the pipeline circumferential weld macroscopically metallographic shooting analysis device comprises the following steps:
1) sample treatment and placement: performing metallographic polishing and corrosive liquid immersion treatment on the surface of the processed X80-grade pipeline ring weld joint sample, wherein the appearance of the processed sample weld joint can be clearly displayed; then, placing the detection surface of the circular weld joint sample on the platy base 9 in an upward mode, and facing right under a lens of a digital camera; sliding the measuring scale 11 and screwing down the fixing screw 10-3 to enable the measuring scale 11 to be placed near the surface of the sample to be detected;
2) taking a picture of the sample and storing: the soft light illumination system 2 is started, the focusing knob 3 and the magnification adjusting knob 4 are respectively rotated, and the brightness adjusting knob 5 in the annular illumination system 2 is adjusted in a matched manner, so that the circumferential weld sample is displayed in a display in a proper size, bright and clear manner; the digital camera shoots a macroscopic metallographic image of the welding seam, and then the image processing module 14-1 is operated to carry out brightness adjustment, contrast enhancement treatment and contour extraction treatment and storage on the received macroscopic metallographic image of the welding seam; observing whether the welding seam of the macroscopic metallographic image of the welding seam has defects; if defective, executing the next step 3);
3) collecting and photographing a sample weld defect image: the method comprises the steps that a hole defect exists in a circumferential weld sample fusion line, a magnification adjusting knob 4 is rotated, a height adjusting knob 7 is rotated if necessary, the defect of the sample is locally amplified, a measuring scale 11 is placed near the defect of the sample, a digital camera shoots the weld defect of a macroscopic golden phase diagram of a weld, and an image processing module 14-1 is controlled to carry out brightness adjustment, contrast enhancement processing and weld fusion line outline extraction processing on the received weld macroscopic golden phase diagram of the weld defect;
4) and (3) measuring the defect size of the sample: according to the actual size of the measuring scale 11 in the defect picture, the magnification of the defect picture is marked in the image measuring module 14-2; then, operating the image measuring module 14-2 to directly measure the defects at the sample fusion line to obtain the actual sizes of the defects;
5) and (3) testing the welding pass of the sample: the image processing module 14-1 is operated to extract the contour of the weld line, and the processed image can clearly distinguish the contour appearance of each weld.
The welding count of the X80 grade wire loop weld specimen was observed to be nine, consistent with the relevant welding process protocol.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a pipeline ring welding seam macroscopic metallography shoots analytical equipment which characterized in that: the device comprises an image acquisition device (1), a soft lighting system (2), a measurement scale (11), an image processing module (14-1) and an image measurement module (14-2), wherein the image acquisition device (1) is fixed on a fixed frame, a focusing knob (3) and a magnification adjusting knob (4) are arranged on the image acquisition device (1), the soft lighting system (2) is arranged on the outer ring of the bottom end of a lens of the image acquisition device (1), and the measurement scale (11) is arranged at a position on the fixed frame where a welding seam sample (13) to be detected is placed; the image acquisition device (1) is used for acquiring image information of a weld joint sample (13) to be detected and sending the acquired image information to the image processing module (14-1), the image processing module (14-1) is used for carrying out brightness adjustment, contrast enhancement processing and weld joint fusion line profile extraction on the received image information and sending the processed image information to the image measurement module (14-2), and the image measurement module (14-2) is used for measuring the defect size in a weld joint.
2. The macroscopically metallographic imaging analysis device for the weld of a pipe loop according to claim 1, characterized in that: the soft lighting system (2) comprises a lampshade, a plurality of LED lamps (2-1) and a soft panel (2-2), the LED lamps (2-1) are uniformly distributed in the lampshade, and the soft panel (2-2) is arranged at the end of the lampshade.
3. The macroscopically metallographic imaging analysis device for the weld of a pipe loop according to claim 2, characterized in that: the soft lighting system (2) is further provided with a brightness adjusting knob (5), and the brightness adjusting knob (5) is used for adjusting the brightness of the lamp light.
4. The macroscopically metallographic imaging analysis device for the weld of a pipe loop according to claim 1, characterized in that: the mount includes base (9), branch (8) and L shape support frame (6), the one end of branch (8) is connected on base (9), a pot head of L shape support frame (6) is established on branch (8), just L shape support frame (6) for branch (8) can slide from top to bottom, the other end of L shape support frame (6) is connected with image acquisition device (1).
5. The device for macroscopically photographing and analyzing the metallographic phase of the weld of the pipeline ring as recited in claim 4, wherein: and one side of the L-shaped support frame (6) sleeved on the support rod (8) is provided with a height adjusting knob (7).
6. The device for macroscopically photographing and analyzing the metallographic phase of the weld of the pipeline ring as recited in claim 4, wherein: the base (9) is provided with a scale adjusting rod (10), and one end of the measuring scale (11) is connected to the scale adjusting rod (10).
7. The device for macroscopically photographing and analyzing the metallographic phase of the weld of the pipe ring according to claim 6, wherein: the scale adjusting rod (10) comprises an L-shaped rod (10-1), a linear rod (10-2) and a fixing screw (10-3), the linear rod (10-2) is sleeved on one side of the L-shaped rod (10-1), and the linear rod (10-2) can slide up and down relative to the L-shaped rod (10-1), the fixing screw (10-3) is arranged on the side wall of the linear rod (10-2), the measuring scale (11) is connected with the linear rod (10-2), one side of the base (9) is provided with a sliding chute (9-1), the other side of the L-shaped rod (10-1) extends into the sliding chute (9-1), the L-shaped rod (10-1) can slide left and right in the sliding groove (9-1).
8. The macroscopically metallographic imaging analysis device for the weld of a pipe loop according to claim 1, characterized in that: the image acquisition device (1) is a digital camera, and the magnification adjusting knob (4) can enable the magnification of the digital camera to be continuously amplified by 1 to 5 times.
9. The macroscopically metallographic imaging analysis device for the weld of a pipe loop according to claim 1, characterized in that: the display is connected with the image processing module (14-1) and the image measuring module (14-2) and is used for displaying image information, weld joint size and defect size in the weld joint.
10. The use method of the macroscopically metallographic analysis device for the weld of a pipe ring according to any one of claims 1 to 9, characterized by comprising the following steps:
step 1: placing a pre-processed welding seam sample (13) to be detected on a base (9), wherein the surface to be detected is upward and is over against the lower part of a lens of an image acquisition device (1), and adjusting a measuring scale (11) to be close to the surface of the sample (13) to be detected;
step 2: the soft light illumination system (2) is started, the focusing knob (3) and the magnification adjusting knob (4) are adjusted and the brightness adjusting knob (5) is matched, image information of the sample (13) to be detected is collected, the image processing module (14-1) is controlled to conduct brightness adjustment, contrast enhancement processing and weld fusion line profile extraction on the received image information, and whether a weld of the sample (13) to be detected is defective or not is observed; if the defect exists, executing step 3;
and step 3: adjusting a magnification adjusting knob (4), amplifying the weld defects of a sample (13) to be detected, placing a measuring scale (11) at the weld defects, collecting image information of the weld defects of the sample (13) to be detected, and controlling an image processing module (14-1) to perform brightness adjustment, contrast enhancement processing and weld fusion line profile extraction on the received image information of the weld defects;
and 4, step 4: an image measurement module (14-2) measures a size of a defect in the weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312762.4A CN111077158B (en) | 2019-12-18 | 2019-12-18 | Macroscopic metallographic photographing and analyzing device for pipeline girth weld and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312762.4A CN111077158B (en) | 2019-12-18 | 2019-12-18 | Macroscopic metallographic photographing and analyzing device for pipeline girth weld and application method thereof |
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| Publication Number | Publication Date |
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| CN111077158A true CN111077158A (en) | 2020-04-28 |
| CN111077158B CN111077158B (en) | 2024-06-25 |
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| CN201911312762.4A Active CN111077158B (en) | 2019-12-18 | 2019-12-18 | Macroscopic metallographic photographing and analyzing device for pipeline girth weld and application method thereof |
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| CN114088738A (en) * | 2022-01-20 | 2022-02-25 | 深圳市华汉伟业科技有限公司 | High-precision defect detection method and device for annular welding seam |
| CN115855962A (en) * | 2023-02-27 | 2023-03-28 | 合肥中科类脑智能技术有限公司 | Welding seam detection device and detection system thereof |
| CN117245196A (en) * | 2023-11-16 | 2023-12-19 | 中国空气动力研究与发展中心高速空气动力研究所 | Strain balance electron beam welding structure and welding method thereof |
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| CN117245196B (en) * | 2023-11-16 | 2024-01-23 | 中国空气动力研究与发展中心高速空气动力研究所 | Strain balance electron beam welding structure and welding method thereof |
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