CN114295715A - Digital fluorescent magnetic powder detection method for welded joint - Google Patents
Digital fluorescent magnetic powder detection method for welded joint Download PDFInfo
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Abstract
The invention provides a digital fluorescent magnetic powder detection method for a welded joint. The method comprises the steps of verifying the sensitivity of a digital fluorescent magnetic powder detection device by adopting a lifting force test and a sensitivity test, placing the digital fluorescent magnetic powder detection device on a detected surface to enable the digital fluorescent magnetic powder detection device to be adsorbed on the detected surface, electrifying an electromagnetic yoke for cross magnetization and spraying magnetic suspension, enabling the detected surface to be full of magnetic lines of force and adsorbing fluorescent magnetic powder on the surface or near-surface defects of a detected weld joint, irradiating by using a black light lamp to generate defect images, and shooting and storing the defect images by adopting a high-definition camera, so that the effective detection of the surface defects of the weld joint is realized; through automatic crawling, magnetization, magnetic suspension spraying and an image acquisition method, detection result deviation in the manual detection process is avoided, detection results can be traced in a mode that a camera records and stores detection positions, and permanent storage of the detection results is achieved. The method is suitable for being applied as a digital fluorescent magnetic powder detection method of the welding joint.
Description
Technical Field
The invention relates to magnetic particle inspection in the field of ships, in particular to a digital fluorescent magnetic particle inspection method applied to magnetic particle inspection of large-scale structural rings and longitudinal welding seams.
Background
At present, the fluorescent magnetic powder detection is mostly carried out by manual operation, an electromagnetic yoke is generally adopted to detect the defects on the surface or the near surface of a welding seam and is arranged on the welding seam, the welding seam is magnetized at an angle of +/-45 degrees with the length direction of the welding seam, magnetic suspension is sprayed, the fluorescent magnetic powder is adsorbed on the defects on the surface or the near surface of the welding seam, and a black light lamp is adopted to irradiate the surface of the welding seam to display the defects.
When the method is adopted for detection, the influence of manual operation capability and personnel responsibility is large, the detection of the defects on the surface or the near surface of the welding seam is easy to miss, the detection result has no traceability, and the permanent storage of the detection image cannot be realized.
By means of the automatic crawling technology and wired data transmission of the digital fluorescent magnetic powder detection device, the magnetic powder detection device can be controlled to perform automatic crawling detection on continuous magnetic conduction surfaces such as large-scale structural rings, longitudinal welding seams and the like; the fluorescent magnetic powder imaging is assisted, the detection condition is monitored in real time by means of a camera, and the detection image is digitally stored by a computer in the control cabinet, so that the work of replacing manual work to finish automatic detection is realized.
Disclosure of Invention
In order to make up for the defects of the existing electromagnetic yoke magnetic powder detection technology, the invention provides a digital fluorescent magnetic powder detection method for a welded joint. According to the fluorescent powder detection method, through automatic crawling, magnetization, magnetic suspension spraying and an image acquisition method, detection result deviation caused by insufficient personnel capacity or weak responsibility factors in the manual detection process is avoided to the greatest extent, the detection result can be traced in a mode that a camera records and stores a detection part, the permanent storage of the detection result is realized, and the technical problem of electromagnetic yoke magnetic powder detection is solved.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a digital fluorescent magnetic powder detection method for a welding joint comprises the steps of verifying the sensitivity of a detection device by adopting a lifting force test and a sensitivity test, placing the detection device on a detected surface to enable the detection device to be adsorbed on the detected surface, electrifying an electromagnetic yoke for cross magnetization and spraying magnetic suspension, enabling the detected surface to be covered with magnetic lines, adsorbing fluorescent magnetic powder on the surface or near-surface defects of a detected welding seam, irradiating by using a black light lamp to generate defect images, and shooting and storing the defect images by using a high-definition camera, so that the effective detection of the surface defects of the welding seam is realized; the method comprises the following steps:
(1) starting up and testing:
after the control cabinet and the detection system of the detection device are connected and no misconnection or virtual connection problem is detected, the control cabinet is powered on, and a computer of the control cabinet is started up and the digital fluorescent magnetic powder detection device is started;
(2) and (3) detection environment inspection:
the light shielding environment can be manufactured in the detection device by means of the front and rear plates of the vehicle body, the side plates of the vehicle body and the O-shaped rubber ring, and the ambient illuminance and the black light irradiance are measured, wherein the ambient illuminance is not more than 20Lx and the black light irradiance is not less than 1000 muW/cm according to the reference standard CB/T3958-20042；
(3) Electromagnetic yoke lifting force test:
suspending the four pneumatic tire positions of the detection device by a certain height, placing a lifting force test block below an electromagnetic yoke, controlling the electromagnetic yoke to move downwards until the electromagnetic yoke is tightly attached to the lifting force test block, electrifying and exciting, and driving the electromagnetic yoke to be slowly lifted through one of the motor driver integrated machines; firstly, recording dynamometer data as original data, driving an electromagnetic yoke to move downwards through a lead screw sliding block in a sleeved mode, constantly acquiring the dynamometer data after the electromagnetic yoke contacts a lifting force test block, indicating that the electromagnetic yoke is tightly attached to a wall surface and exerts certain pressure when the dynamometer data and the original data are greatly changed, controlling the electromagnetic yoke to work in an electrified mode, driving the electromagnetic yoke to lift by means of one motor driver all-in-one machine, and continuously extracting the dynamometer data; when the difference value between the real-time data and the original data reaches a standard value of 45N, stopping the rotation of the motor driver all-in-one machine, continuously monitoring the force measurement counting value, keeping the value difference at the standard value for 3 seconds, and enabling the adsorption force of the electromagnetic yoke of the detection device to meet the detection requirement;
(4) calibrating linear motion of an electromagnetic yoke:
controlling the electromagnetic yoke to move downwards through one of the motor driver integrated machines until the electromagnetic yoke is tightly contacted with the detected wall surface, judging the numerical value on the display of the control cabinet, and if the numerical value is within the range of +/-20, indicating that the linear motion of the electromagnetic yoke of the detection device meets the requirement;
(5) calibrating the rotation motion of the electromagnetic yoke:
controlling the electromagnetic yoke to rotate 45 degrees leftwards by the other motor driver integrated machine, controlling the electromagnetic yoke to rotate 90 degrees rightwards by the motor driver integrated machine through the reverse rotation of the motor driver integrated machine after the movement is finished, judging the numerical value on the display of the control cabinet after the device to be detected finishes the movement, and if the numerical value is within the range of +/-20, indicating that the rotation movement of the electromagnetic yoke of the detection device meets the requirement and the rotation in the horizontal direction is accurate;
(6) and (3) testing the detection sensitivity:
selecting a steel plate with the specification and size larger than that of the detection device, downwards arranging the A1-30/100 test piece groove on the steel plate, fixing the test piece on the steel plate in a mode which is effective and does not influence the formation of magnetic marks, arranging the detection device above the test piece, controlling one electric appliance driver all-in-one machine by using a control cabinet to rotate forward to drive an electromagnetic yoke to move downwards, after the lifting force of the electromagnetic yoke is tested to meet the conditions, enabling the electromagnetic yoke to move downwards and rotate, carrying out cross magnetization on the test piece, spraying magnetic suspension liquid through a magnetic suspension liquid nozzle, turning on a black light lamp, observing the display of the magnetic marks through a high-definition camera, and showing that the magnetic marks of an obvious circle and a cross are generated, thus indicating that the sensitivity of the electromagnetic yoke of the system meets the requirements.
(7) Image acquisition and input and output:
the detection device is used for capturing images of different detected surfaces, and the detection device is proved to have reliable and stable image acquisition capacity, normal functions, clear imaging effect and JPEG (joint photographic experts group) photo format; calculating the size of the captured coordinate paper image, wherein the size of the shot image is not less than 10cm x 5 cm; taking and input/output testing are carried out on the shot image, and the detection device is verified to have a quick input/output function;
(8) adsorption test of the detection device:
respectively arranging the detection devices on vertical and horizontal detected surfaces, adjusting the high-performance type magnets, and observing whether the detection devices slide down or overturn and are unstable in adsorption under static and dynamic conditions;
(9) testing the motion of the detection device:
respectively arranging the detection devices on vertical and horizontal detected surfaces, respectively setting the rotation direction and the rotation speed of a motor driver of the detection device, and controlling the detection device to perform linear forward and backward movement; the turning motion of the detection device is realized by utilizing a differential principle; observing whether the straight line and turning motion can be realized;
(10) automatic detection:
after the function test is finished and the welding seam is in a complete state, the detection device is safely arranged on the detected welding seam, and the position of the detection device is adjusted to ensure that the detected welding seam is positioned on the central line of the advancing direction of the detected welding seam; firstly, carrying out magnetic suspension spraying on a detected welding line through a magnetic suspension nozzle to ensure that the magnetic suspension spraying position and a heat affected zone of the detected welding line are in a wet state; after the other motor driver integrated machine rotates forward to drive the electromagnetic yoke to rotate 45 degrees leftwards, the one motor driver integrated machine drives the electromagnetic yoke to move downwards until the electromagnetic yoke is in close contact with the detected wall surface, the electromagnetic yoke is electrified and excited, magnetic suspension is sprayed through a magnetic suspension nozzle for 1-3 seconds, and a black light lamp is turned on to record a detection result by means of automatic focusing of a high-definition camera; after the electromagnetic yoke is disconnected, one of the motor driver integrated machines drives the electromagnetic yoke to move upwards to a vertical original position, the other of the motor driver integrated machines reversely drives the electromagnetic yoke to rotate 90 degrees rightwards, one of the motor driver integrated machines drives the electromagnetic yoke to move downwards until the electromagnetic yoke is in close contact with the surface of the detected surface 201, the electromagnetic yoke is electrified and excited and simultaneously sprays magnetic suspension through a magnetic suspension nozzle, the time lasts for 1-3s, a black light lamp is turned on, and the detection result is recorded by means of automatic focusing of a high-definition camera; one motor driver all-in-one machine drives the electromagnetic yoke to move upwards to a vertical original position, so that one detection operation is completed; then controlling the vehicle body to move forwards, carrying out the next detection operation, and repeatedly circulating the process until the detected welding seam is detected;
(11) image evaluation and redetection:
if the images recorded by the high-definition camera are evaluated and suspected defect magnetic trace images appear, manual retesting can be carried out on the film position according to the information of the images, and whether the magnetic traces are defects or not is confirmed.
The detection method provided by the invention has the advantages that the circumferential weld and the longitudinal weld of the large-scale structure can be effectively and automatically detected, the detection images are stored, the defects of the prior art are overcome, and the automation degree is high. The method is suitable for being applied as a digital fluorescent magnetic powder detection method of the welding joint.
Drawings
FIG. 1 is a bottom view of a fluorescent magnetic powder inspection device performing inspection along a weld;
FIG. 2 is a front view of the fluorescent magnetic particle inspection apparatus along a weld;
FIG. 3 is a schematic view of a fluorescent magnetic powder inspection apparatus performing inspection along a girth weld of a large structure.
In the figure, 101, a pneumatic tire, 102, a high-performance type magnet, 103, a vehicle body front plate, a vehicle body rear plate, 104, a detected welding line, 105, a magnetic suspension nozzle, 106, a vehicle body side plate, 107, an O-shaped rubber ring, 108, a high-definition camera, 109, an electromagnetic yoke, 110, a magnetic suspension spraying position, 111, a black light lamp, 201, a detected surface, 301, a large-structure annular welding line, 302, an annular detected welding line, 303, a detection device and 304 implement detection direction.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
All embodiments, implementations and features of the invention can be combined with each other in the invention without contradiction or conflict. In the present invention, conventional devices, apparatuses, components, etc. are either commercially available or self-made according to the present disclosure. In the present invention, some conventional operations and apparatuses, devices, components are omitted or only briefly described in order to highlight the importance of the present invention.
According to the figure, the digital fluorescent magnetic powder detection device for the welded joint comprises a pneumatic tire 101, a high-performance type magnet 102, a front plate 103 and a rear plate 103 of a vehicle body, a magnetic suspension nozzle 105, a side plate 106 of the vehicle body, an O-shaped rubber ring 107, a high-definition camera 108, an electromagnetic yoke 109 and a black light lamp 111, wherein the front plate 103 and the rear plate 106 of the vehicle body and the side plate 106 of the vehicle body are enclosed to form the vehicle body, the pneumatic tire 101 is arranged on the side portion of the vehicle body, the high-performance type magnet 102 is arranged at the bottom of the vehicle body, the magnetic suspension nozzle 105, the O-shaped rubber ring 107, the high-definition camera 108 and the black light lamp 111 are arranged in the inner cavity of the vehicle body, and the electromagnetic yoke 109 penetrates through the inner cavity of the vehicle body.
A digital fluorescent magnetic powder detection method for a welding joint takes a large-scale structure annular butt welding seam 301 with the diameter of 10 meters as an example, realizes comprehensive magnetic powder detection for the annular welding seam, records and stores welding seam image information, and specifically explains the implementation process.
(1) Starting up and testing:
after the control cabinet and the detection device 303 are used for detecting that all parts of the system are connected and no misconnection or virtual connection problem is detected, power supply operation is carried out on the control cabinet, the computer of the control cabinet is started, and the digital fluorescent magnetic powder detection device 303 is started;
(2) and (3) detection environment inspection:
by means of the front part of the vehicle bodyThe rear plate 103, the vehicle body side plate 106 and the O-shaped rubber ring 107 can be used for manufacturing a light shielding environment in the detection device 303, measuring the ambient illuminance and the black light irradiance, and measuring the actual ambient illuminance 8Lx and the black light irradiance 15977 mu W/cm2；
(3) Electromagnetic yoke lifting force test:
suspending the four pneumatic tire 101 positions of the detection device 303 for a certain height, placing the lifting force test block below the electromagnetic yoke 109, controlling the electromagnetic yoke 109 to move downwards until the electromagnetic yoke is tightly attached to the lifting force test block, electrifying and exciting, and driving the electromagnetic yoke 109 to slowly lift through one of the motor-driver integrated machines; firstly, recording dynamometer data as original data, driving an electromagnetic yoke to move downwards through a lead screw slider sleeve, constantly acquiring the dynamometer data after the electromagnetic yoke 109 contacts a lifting force test block, indicating that the electromagnetic yoke 109 is tightly attached to a wall surface and exerts certain pressure when the dynamometer data and the original data are greatly changed, controlling the electromagnetic yoke to work in an electrified way, driving the electromagnetic yoke 109 to lift by means of one motor driver all-in-one machine, and continuously extracting the dynamometer data; when the difference value between the real-time data and the original data reaches a standard value of 45N, stopping the rotation of the motor driver all-in-one machine, continuously monitoring the force measurement counting value, keeping the value difference at the standard value for 3 seconds, and enabling the adsorption force of the electromagnetic yoke of the detection device to meet the detection requirement;
(4) calibrating linear motion of an electromagnetic yoke:
controlling the electromagnetic yoke 109 to move downwards through one of the motor driver integrated machines until the electromagnetic yoke 109 is tightly contacted with the detected wall surface, judging the numerical value on the display of the control cabinet, and determining that the linear motion of the electromagnetic yoke of the detection device meets the requirement through calibration tests, wherein the three numerical values are 1, 2 and 0 respectively;
(5) calibrating the rotation motion of the electromagnetic yoke:
controlling the electromagnetic yoke 109 to rotate 45 degrees leftwards by another motor driver integrated machine, after the movement is finished, controlling the electromagnetic yoke 109 to rotate 90 degrees rightwards by the motor driver integrated machine through the reverse rotation of the motor driver integrated machine, judging the numerical value on the display of the control cabinet after the device to be detected 303 finishes the movement, and indicating that the rotary movement of the electromagnetic yoke of the detection device meets the requirement and the rotation is accurate in the horizontal direction through calibration tests, wherein the three numerical values are-1, 2 and 1 respectively;
(6) and (3) testing the detection sensitivity:
selecting a steel plate with the specification size of 650 x 500 x 24mm, downwards arranging a groove of an A1-30/100 test piece on the steel plate, fixing the test piece on the steel plate in a mode which is effective and does not influence the formation of magnetic marks, arranging a detection device 303 above the test piece, controlling one electric appliance driver all-in-one machine to rotate forward by using a control cabinet to drive an electromagnetic yoke 109 to move downwards, after the lifting force of the electromagnetic yoke meets the conditions, downwards moving and rotating the electromagnetic yoke, carrying out cross magnetization on the test piece, simultaneously spraying magnetic suspension through a magnetic suspension nozzle 105, turning on a black light lamp 111, observing the display of the magnetic marks through a high-definition camera 108, and indicating that the sensitivity of the electromagnetic yoke of the system meets the requirements if the magnetic marks are obvious 'circle' and 'cross'.
(7) Image acquisition and input and output:
the detection device 303 is used for capturing images of the circumferential weld 301 of different large structures, and the detection device 303 is proved to have reliable and stable image acquisition capacity, normal functions, clear imaging effect and JPEG (joint photographic experts group) picture format; calculating the size of the captured coordinate paper image, wherein the size of the shot image is 20cm x 10 cm; the 20 images are subjected to calling and input/output tests, and the detection device 303 is verified to have a rapid input/output function;
(8) adsorption test of the detection device:
respectively arranging the detection devices 303 on the circumferential weld 301 of the large-scale structure, adjusting the high-performance type magnets 102, and respectively observing whether the detection devices 303 slide down and overturn and are unstable in adsorption under static and dynamic conditions, wherein the detection devices 303 can realize stable adsorption;
(9) testing the motion of the detection device:
respectively arranging the detection devices 303 on the large-scale structure circumferential weld 301, respectively setting the rotation directions and the rotation speeds of motor drivers of the detection devices, and controlling the detection devices to move forwards and backwards in a straight line; the turning motion of the detection device is realized by utilizing a differential principle; the detection device can realize forward movement, backward movement and turning movement;
(10) automatic detection:
after the function test is finished and the ring-shaped weld joint 302 is in a good state, the detection device (303) is safely arranged on the ring-shaped weld joint 302 to be detected, and the position of the detection device is adjusted to ensure that the ring-shaped weld joint 302 to be detected is positioned in the implementation detection direction 304; firstly, magnetic suspension spraying is carried out on the welded joint 104 to be detected through a magnetic suspension nozzle 105, and the magnetic suspension spraying position 110 and a heat affected zone of the welded joint 104 to be detected are ensured to be in a wet state; after the electromagnetic yoke 109 is driven by the other motor driver all-in-one machine to rotate leftwards by 45 degrees by positive rotation, the electromagnetic yoke 109 is driven by the one motor driver all-in-one machine to move downwards until the electromagnetic yoke is tightly contacted with the detected wall surface, the electromagnetic yoke is electrified and excited, magnetic suspension is sprayed through a magnetic suspension nozzle 105 for 1 to 3 seconds continuously, and a black light lamp 111 is turned on to automatically focus and record a detection result by means of a high-definition camera 108; after the electromagnetic yoke 109 is disconnected, one of the motor driver integrated machines drives the electromagnetic yoke 109 to move upwards to a vertical original position, the other one of the motor driver integrated machines reversely rotates to drive the electromagnetic yoke 109 to rotate 90 degrees rightwards, one of the motor driver integrated machines drives the electromagnetic yoke 109 to move downwards until the electromagnetic yoke is in close contact with the surface of the large-scale structural annular welding line 301, magnetic suspension is sprayed through the magnetic suspension nozzle 105 while electrification and excitation are carried out for 1-3 seconds, the black light lamp 111 is turned on, and the detection result is automatically focused and recorded by the high-definition camera 108; one of the motor driver integrated machines drives the electromagnetic yoke 109 to move upwards to a vertical original position, so that one detection operation is completed; then controlling the vehicle body to move forwards, carrying out the next detection operation, and repeatedly circulating the process until the annular detected welding line 302 is detected;
(11) image evaluation and redetection:
if the images recorded by the high-definition camera 108 are evaluated and suspected defect magnetic trace images appear, manual retesting can be carried out on the film position according to the information of the images to confirm whether the magnetic traces are defects or not; through observation, the large-scale structure annular butt weld is free of defect magnetic marks.
The invention has the advantages that:
compared with the conventional magnetic powder detection mode of the handheld electromagnetic yoke, the magnetic powder detection device has the following innovation points:
(1) the digital fluorescent magnetic powder detection device can carry out dynamic detection operation on a structural surface to be detected, integrates electromechanical and hydraulic control into a whole, is a multifunctional and highly integrated detection device, can autonomously finish corresponding standard operation processes to replace manual operation, or carry out key monitoring on a local wall surface to be detected through manual operation, and can record and store images of a detection part, thereby creating a precedent.
(2) By adopting the array type permanent magnetic adsorption technology, the magnets of high-performance models are uniformly distributed on the front side and the rear side of the vehicle body, the adsorption force of the magnetic powder detection device can be changed by automatically loading and unloading the magnets, the magnetic powder detection device is suitable for metal wall surfaces with different magnetic conductivities, is stable and reliable, can avoid equipment falling under the emergency power-off condition, and can ensure the man-machine safety under various working environments by matching the permanent magnetic chuck and the falling protector.
(3) The digital fluorescent magnetic powder detection device adopts a mode of combining a limiting disc and a pneumatic tire. The spacing dish can restrict pneumatic tire compression capacity, and then the biggest adsorption affinity of control magnetic particle testing device during operation, avoids the too big condition that leads to equipment power not enough of adsorption affinity.
(4) The digital fluorescent magnetic powder detection device adopts a totally enclosed shell, and a box body consisting of an inner lining plate moving together with a magnetic yoke is arranged in the digital fluorescent magnetic powder detection device to jointly complete the manufacture of a dark environment. The O-shaped rubber ring is arranged on the lower side of the inner lining plate, when the magnetic yoke moves towards the wall surface until the magnetic yoke contacts the wall surface, the inner lining plate moves along with the magnetic yoke, meanwhile, the O-shaped rubber ring is properly compressed and clings to the wall surface to avoid light sources from entering, meanwhile, a gap is formed between the inner lining plate and the hole of the upper plate of the vehicle body, and a sealing strip is adhered to the inner hole of the upper plate of the vehicle body, so that the movement is not influenced, and the light sources are prevented from entering.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (1)
1. A digital fluorescent magnetic powder detection method for a welded joint is characterized by comprising the following steps: the method comprises the steps of verifying the sensitivity of a detection device (303) by adopting a lifting force test and a sensitivity test, placing the detection device (303) on a detected surface (201) to enable the detection device to be adsorbed on the detected surface (201), electrifying an electromagnetic yoke (109) for cross magnetization and spraying magnetic suspension, enabling fluorescent magnetic powder to be adsorbed on the surface or near-surface defects of a detected welding line (104) while the detected surface (201) is full of magnetic lines, irradiating by using a black light lamp (111) to generate defect images, and shooting and storing the defect images by using a high-definition camera (108), thereby realizing effective detection of the surface defects of the welding line; the method comprises the following steps:
(1) starting up and testing:
after the control cabinet and the detection device (303) are connected to detect that all parts of the system are connected and no misconnection or virtual connection problem is detected, power supply operation is carried out on the control cabinet, the computer of the control cabinet is started, and the digital fluorescent magnetic powder detection device (303) is started;
(2) and (3) detection environment inspection:
a light shielding environment is manufactured in the detection device (303) by means of the front and rear plates (103) and the side plates (106) of the vehicle body and the O-shaped rubber ring (107), the ambient illuminance and the black light irradiance are measured, the ambient illuminance is not more than 20Lx and the black light irradiance is not less than 1000 mu W/cm according to the reference standard CB/T3958-20042；
(3) Electromagnetic yoke lifting force test:
suspending the positions of four pneumatic tires (101) of a detection device (303) by a certain height, placing a lifting force test block below an electromagnetic yoke (109), controlling the electromagnetic yoke (109) to move downwards until the lifting force test block is tightly attached to the lifting force test block, electrifying and exciting, and driving the electromagnetic yoke (109) to slowly lift through one motor driver integrated machine; firstly, recording dynamometer data as original data, driving an electromagnetic yoke to move downwards through a lead screw slider sleeve, constantly acquiring the dynamometer data after the electromagnetic yoke (109) contacts a lifting force test block, indicating that the electromagnetic yoke (109) is tightly attached to a wall surface and exerts certain pressure when the dynamometer data and the original data are greatly changed, controlling the electromagnetic yoke to work by electrifying, driving the electromagnetic yoke (109) to lift by means of one motor driver all-in-one machine, and continuously extracting the dynamometer data; when the difference value between the real-time data and the original data reaches a standard value of 45N, stopping the rotation of the motor driver all-in-one machine, continuously monitoring the force measurement counting value, keeping the value difference at the standard value for 3 seconds, and enabling the adsorption force of the electromagnetic yoke of the detection device to meet the detection requirement;
(4) calibrating linear motion of an electromagnetic yoke:
controlling the electromagnetic yoke (109) to move downwards through one of the motor driver integrated machines until the electromagnetic yoke (109) is tightly contacted with the detected wall surface, judging the numerical value on the display of the control cabinet, and if the numerical value is within the range of +/-20, indicating that the linear motion of the electromagnetic yoke of the detection device meets the requirement;
(5) calibrating the rotation motion of the electromagnetic yoke:
controlling the electromagnetic yoke (109) to rotate 45 degrees leftwards through another motor driver integrated machine, after the movement is finished, controlling the electromagnetic yoke (109) to rotate 90 degrees rightwards through the motor driver integrated machine by reversing, judging a numerical value on a display of a control cabinet after the movement is finished by the device to be detected (303), and if the numerical value is within a range of +/-20, indicating that the rotation movement of the electromagnetic yoke (109) of the detection device meets the requirement and the rotation in the horizontal direction is accurate;
(6) and (3) testing the detection sensitivity:
selecting a steel plate with the specification size larger than that of the detection device (303), downwards arranging a groove of an A1-30/100 test piece on the steel plate, fixing the test piece on the steel plate in an effective mode without influencing the formation of magnetic marks, arranging the detection device (303) above the test piece, controlling one electric appliance driver all-in-one machine to rotate forward by using a control cabinet to drive an electromagnetic yoke (109) to move downwards, after the lifting force of the electromagnetic yoke is tested to meet the conditions, downwards moving and rotating the electromagnetic yoke, carrying out cross magnetization on the test piece, simultaneously spraying magnetic suspension through a magnetic suspension nozzle (105), turning on a black light lamp (111), observing the magnetic marks through a high-definition camera (108) to display, and indicating that the sensitivity of the electromagnetic yoke of the system meets the requirements if the magnetic marks are obvious 'circle' and 'cross' generated;
(7) image acquisition and input and output:
the detection device (303) is used for capturing images of different detected surfaces (201), and the detection device (303) is proved to have reliable and stable image acquisition capacity, normal functions, clear imaging effect and JPEG (joint photographic experts group) picture format; calculating the size of the captured coordinate paper image, wherein the size of the shot image is not less than 10cm x 5 cm; the captured image is subjected to calling and input/output tests, and the detection device (303) is verified to have a rapid input/output function;
(8) adsorption test of the detection device:
respectively arranging the detection devices (303) on vertical and horizontal detected surfaces (201), adjusting the high-performance type magnet (102), and observing whether the detection devices (303) slide downwards and overturn and are unstable in adsorption under static and dynamic conditions;
(9) testing the motion of the detection device:
arranging the detection devices (303) on the vertical and horizontal detected surfaces (201) respectively, setting the rotation directions and the rotation speeds of motor drivers of the detection devices respectively, and controlling the detection devices to move forwards and backwards in a straight line; the turning motion of the detection device is realized by utilizing a differential principle; observing whether the straight line and turning motion can be realized;
(10) automatic detection:
after the function test is finished and the welding seam is in a good state, the detection device (303) is safely arranged on the welding seam (104) to be detected, and then the position of the detection device is adjusted to ensure that the welding seam (104) to be detected is positioned on the central line of the advancing direction of the welding seam; firstly, magnetic suspension spraying is carried out on a welded joint (104) to be detected through a magnetic suspension nozzle (105), and the magnetic suspension spraying position (110) and a heat affected zone of the welded joint (104) to be detected are ensured to be in a wet state; after the electromagnetic yoke (109) is driven to rotate 45 degrees leftwards by the forward rotation of the other motor driver integrated machine, the electromagnetic yoke (109) is driven by one motor driver integrated machine to move downwards to be in close contact with the detected wall surface, the electromagnetic yoke is electrified and excited, magnetic suspension is sprayed through a magnetic suspension nozzle (105) for 1-3 seconds continuously, and a black light lamp (111) is turned on to automatically focus and record a detection result by means of a high-definition camera (108); after the electromagnetic yoke (109) is disconnected, one motor driver all-in-one machine drives the electromagnetic yoke (109) to move upwards to a vertical original position, the other motor driver all-in-one machine reversely rotates to drive the electromagnetic yoke (109) to rotate 90 degrees rightwards, one motor driver all-in-one machine drives the electromagnetic yoke (109) to move downwards until the electromagnetic yoke is in close contact with the surface of the detected surface (201), the electromagnetic suspension is sprayed through a magnetic suspension nozzle (105) during electrification and excitation for 1-3 seconds, a black light lamp (111) is turned on, and a detection result is automatically focused and recorded by means of a high-definition camera (108); one of the motor driver integrated machines drives the electromagnetic yoke (109) to move upwards to a vertical original position, so that one detection operation is completed; then controlling the vehicle body to move forwards, carrying out the next detection operation, and repeatedly circulating the process until the detected welding seam (104) is detected;
(11) image evaluation and redetection:
if the image recorded by the high-definition camera (108) is evaluated and a suspected defect magnetic trace image appears, manual retesting can be carried out on the position according to the information of the image to confirm whether the magnetic trace is a defect.
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| CN202111529970.7A CN114295715A (en) | 2021-12-15 | 2021-12-15 | Digital fluorescent magnetic powder detection method for welded joint |
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| CN202111529970.7A Pending CN114295715A (en) | 2021-12-15 | 2021-12-15 | Digital fluorescent magnetic powder detection method for welded joint |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115284101A (en) * | 2022-07-19 | 2022-11-04 | 国家能源集团科学技术研究院有限公司 | Automatic grinding and detecting device for fillet weld of tube seat in limited space |
| CN117268740A (en) * | 2023-11-23 | 2023-12-22 | 昌乐三强量具有限公司 | Continuous accurate verifying attachment of cushion |
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2021
- 2021-12-15 CN CN202111529970.7A patent/CN114295715A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115284101A (en) * | 2022-07-19 | 2022-11-04 | 国家能源集团科学技术研究院有限公司 | Automatic grinding and detecting device for fillet weld of tube seat in limited space |
| CN115284101B (en) * | 2022-07-19 | 2024-03-29 | 国家能源集团科学技术研究院有限公司 | Automatic polishing and detecting device for fillet weld of limited space tube seat |
| CN117268740A (en) * | 2023-11-23 | 2023-12-22 | 昌乐三强量具有限公司 | Continuous accurate verifying attachment of cushion |
| CN117268740B (en) * | 2023-11-23 | 2024-02-20 | 昌乐三强量具有限公司 | Continuous accurate verifying attachment of cushion |
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