A seam welding CCD vision monitoring device for precisely detecting welding quality

Abstract

The present invention discloses a seam welding CCD vision monitoring device for accurately detecting welding quality, which relates to the field of welding monitoring. The device includes a base, a fixed seat and a movable seat. The fixed seat is installed above the base, and a movable seat is arranged on the left side of the fixed seat. A moving control mechanism is connected below the movable seat to provide control for the horizontal movement of the movable seat. A CCD monitor is arranged on the left side of the fixed seat to conduct visual monitoring on the welding position. An installation seat is connected above the CCD monitor, and a transmission ring is connected to the right side of the installation seat. The seam welding CCD vision monitoring device for accurately detecting welding quality provides support for the welded product through the cooperation of the movable seat and the fixed seat. The welded product can move along with the movement of the movable seat to adjust the welding monitoring position. Moreover, the CCD monitor can move around the welded product to change the monitoring position, enabling monitoring of the product after welding output or after the product is completely welded.

Description

Technical Field

[0001] The present invention relates to the technical field of welding monitoring, and particularly to a seam welding CCD vision monitoring device for accurately detecting welding quality. Background Technique

[0002] The principle of a seam welder is to weld metal pole pieces together through high-frequency vibration, and weld marks will be left on the tab side. The shapes of the weld marks are generally square and triangular according to the different tooth patterns of the welding head. Whether the welding is qualified used to be manually identified by sampling inspection from the coil stock. The manual inspection methods include directly observing with a magnifying glass, checking whether the weld mark is perforated through strong light, measuring the maximum peel force of the tab with a tensiometer, measuring the resistance values on both sides of the weld mark, etc.

[0003] The purpose of vision inspection is to extract the characteristic values in the image to achieve data quantization, and then judge the quality of the welding by subsequent data processing. However, the above-mentioned manual sampling inspection method cannot detect the running state of the device in real time, and cannot observe the service life state of the welding head and welding seat to make formula adjustments or replace hardware devices in time. The qualification rate of the sampling inspection method cannot represent the qualification rate of the entire coil stock, especially for continuous materials. Moreover, the manual inspection method will surely damage the material to be inspected, resulting in unnecessary waste of raw materials. Therefore, it is necessary to add a CCD vision inspection system at the welding position to replace part of the manual inspection work. The aim is to improve the accuracy of quality inspection and further realize the intelligence of the production line.

[0004] Prior Art 1 (a Chinese patent with publication number CN219787068U, published on October 3, 2023) A spherical tank welding monitoring device, including a mounting frame, a lifting mechanism is provided at the top of the mounting frame. At the top of the lifting mechanism, a rotating motor is provided. At the top of the rotating motor, a horizontal telescoping mechanism is provided. On the side of the horizontal telescoping mechanism away from the rotating motor, a multi-directional angle adjustment mechanism is provided. On the side of the multi-directional angle adjustment mechanism away from the horizontal telescoping mechanism, a scanning monitoring ring is provided. The present utility model is installed at a suitable required position through the mounting frame, then the height adjustment is realized through the lifting mechanism, the rotation adjustment is realized through the rotating motor, the horizontal telescoping length is changed through the horizontal telescoping mechanism, the arbitrary direction and angle are changed through the multi-directional angle adjustment mechanism, and the monitoring is carried out through the scanning monitoring camera inside the scanning monitoring ring, replacing manual monitoring, so as to realize efficient monitoring of it and greatly improve the monitoring efficiency; Prior Art 2 (a Chinese patent with publication number CN105855757A, published on August 17, 2016) A real-time on-line monitoring method and device for welding defects. Combining the device and the method, on-line real-time monitoring of welding parameters can be carried out. And the monitoring data is saved. At the same time, the weld quality can be judged by comparing the set electrical parameter standard value and the data in the defect database through the degree of mismatch exceeding the standard value. The present invention can quickly and effectively monitor the parameters of automatic welding, judge and improve the quality of automatic welding.

[0005] Although current vision monitoring devices can achieve welding monitoring, when it comes to seam welding components, the detection movement of the annular welding position is relatively inconvenient, and directly through surface image recognition, it cannot assist in identifying welding quality by light, reducing its overall detection accuracy and monitoring effect. Summary of the Invention

[0006] The purpose of the present invention is to provide a seam welding CCD vision monitoring device for accurately detecting welding quality, so as to solve the problem in the above-mentioned background technology that although current vision monitoring devices can achieve welding monitoring, when it comes to seam welding components, the detection movement of the annular welding position is relatively inconvenient, and directly through surface image recognition, it cannot assist in identifying welding quality by light.

[0007] To achieve the above object, the present invention provides the following technical solution: A seam welding CCD vision monitoring device for accurately detecting welding quality, including a base, a fixed seat and a movable seat. The fixed seat is installed above the base, and a movable seat is arranged on the left side of the fixed seat. A moving control mechanism is connected below the movable seat to control the horizontal movement of the movable seat. A CCD monitor is arranged on the left side of the fixed seat to conduct visual monitoring of the welding area. An installation seat is connected above the CCD monitor, and a transmission ring is connected to the right side of the installation seat. A rotational connection is formed between the transmission ring and the fixed seat, and a first gear is meshed above the transmission ring. A second motor is connected to the right side of the first gear to control the rotation of the first gear, so that the transmission ring drives the CCD monitor to move around the welding position. A movable rod penetrates through the inside of the movable seat, and a support plate is rotatably connected to the left end of the movable rod. The support plate is fixed above the base. A lighting device is arranged on the right side of the movable rod, and the lighting device and the CCD monitor are arranged opposite to each other. A rotation control mechanism is connected to the outside of the movable rod to control the rotation of the movable rod together with the CCD monitor. Workpiece positioning mechanisms are arranged on the inner sides of both the movable seat and the fixed seat to provide a positioning and supporting effect for the seam welding workpieces.

[0008] Further optimizing the technical solution, the moving control mechanism includes a threaded rod and a first motor;

[0009] The threaded rod penetrates through the lower part of the movable seat and forms a threaded connection with the movable seat, and a left-right sliding structure is formed between the lower end of the movable seat and the base;

[0010] The first motor is connected to the threaded rod to control the rotation of the threaded rod.

[0011] Further optimizing the technical solution, an auxiliary cleaning mechanism is arranged on the outside of the installation seat to clean during the monitoring of the welding area.

[0012] Further optimizing the technical solution, the auxiliary cleaning mechanism includes a cleaning brush, a connecting block, a first spring and a moving mechanism;

[0013] The cleaning brush is arranged at the rear side of the installation seat;

[0014] The connecting block is arranged above the cleaning brush, and the upper end of the cleaning brush penetrates through the connecting block and forms an up-down sliding structure with the connecting block;

[0015] The first spring is arranged above the cleaning brush to provide a downward pulling force for the cleaning brush;

[0016] The moving mechanism is connected to the connecting block to drive the connecting block to move.

[0017] Further optimizing the technical solution, the moving mechanism includes a first magnet, a second magnet and a second spring;

[0018] A first magnet is fixed on the right side of the connecting block, and a left-right sliding structure is formed between the first magnet and the mounting seat;

[0019] The second magnet is fixed on the left side of the fixing seat, and the second magnets are distributed at equal angles with the center of the transmission ring as the center of the circle, and the second magnet and the first magnet attract each other when facing each other;

[0020] The second spring is arranged on the right side of the connecting block to provide a reset thrust for the connecting block.

[0021] To further optimize the technical solution, the rotation control mechanism includes a first transmission rod, a second gear, a movable disk and a transmission block;

[0022] A first transmission rod is fixed on the left side of the first gear, and the left end of the first transmission rod passes through the movable seat and forms a nested structure between the movable seats;

[0023] A second gear is arranged between the outer side of the first transmission rod and the first transmission rod to form a left-right sliding structure, and the second gear is arranged inside the movable seat, and a rotation connection is formed between the second gear and the movable seat;

[0024] The movable plate is arranged below the second gear and meshes with the second gear, and the movable plate is rotatably connected with the movable seat, the movable rod passes through the movable plate and the movable plate forms a left-right sliding structure, and the size of the movable plate is the same as the size of the transmission ring and the size of the first gear and the second gear;

[0025] The transmission block is arranged inside the second gear and the movable plate and is connected with the first transmission rod and the movable rod respectively.

[0026] Further optimizing the technical solution, the workpiece positioning mechanism includes a movable block, a third gear, a mounting shaft, a fourth gear, a drive ring and a synchronous control mechanism;

[0027] The movable blocks are distributed at equal angles on the inner sides of the fixed seat and the movable seat, and the movable blocks and the fixed seat and the movable seat are respectively connected in a sliding manner;

[0028] A third gear is arranged on the outer side of the movable block and is meshedly connected with the movable block;

[0029] The mounting shaft is fixed at the middle of the third gear, and the mounting shaft and the fixed seat and the movable seat are respectively connected in rotation;

[0030] A fourth gear is fixed on the surface of the mounting shaft and is staggered with the third gear;

[0031] A driving ring, arranged on the outer side of the fourth gear and meshingly connected with the fourth gear;

[0032] The synchronization control mechanism is connected to the driving ring to control the rotation of the driving ring.

[0033] To further optimize this technical solution, a positioning block is nested at the end of the movable block, and a third spring is fixed to the outer end of the positioning block to provide a thrust force for the positioning block. An activity ball is arranged at the inner end of the positioning block located in the middle of the movable seat.

[0034] To further optimize this technical solution, the synchronization control mechanism includes a fifth gear, a third motor, a second transmission rod, and a sixth gear;

[0035] The fifth gear is arranged inside the fixed seat, and the fifth gear meshes with the driving ring inside the fixed seat;

[0036] The third motor is connected to the fifth gear to control the rotation of the fifth gear;

[0037] The second transmission rod is fixed to the left side of the fifth gear, and the left end of the second transmission rod penetrates through the movable seat and forms a nested connection between the movable seats;

[0038] The sixth gear is arranged inside the movable seat and meshes with the driving ring inside the movable seat, and a horizontal sliding structure is formed between the sixth gear and the second transmission rod.

[0039] Compared with the prior art, the beneficial effects of the present invention are:

[0040] The movable seat cooperates with the fixed seat to provide support for the welded product. The welded product can be moved along with the movement of the movable seat to adjust the welding monitoring position. Moreover, the CCD monitor can move around the welded product to change the monitoring position, and it can monitor the product after welding output or after the product is welded.

[0041] After the product is clamped by the movable seat, it can drive the product to move, adjust the monitoring position of the product, and is more flexible to use. Moreover, movable blocks for positioning are arranged inside both the movable seat and the fixed seat, improving the support effect on the product.

[0042] The movable rod cooperates with the illuminator to provide illumination inside the welding position, and cooperates with the CCD monitor to monitor the outside of it to check for light leakage, etc. Moreover, the movable rod can move synchronously with the movement of the CCD monitor to adjust the illumination position so that they can be mutually adapted.

[0043] Through the first transmission rod, the power between the transmission ring and the movable disk can be transmitted, enabling them to rotate synchronously, thereby ensuring the consistency of subsequent illumination and monitoring positions.

[0044] Through the second transmission rod, the movement of the movable blocks inside the fixed seat and the movable seat can be synchronously controlled, enabling them to synchronously complete the support and positioning of the welded product and improving the efficiency of subsequent operations. Brief Description of the Drawings

[0045] Figure 1 Schematic diagram of the three-dimensional structure of the present invention;

[0046] Figure 2 Schematic diagram of the rear view structure of the present invention;

[0047] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at a in;

[0048] Figure 4 Schematic diagram of the three-dimensional structure of the movable rod of the present invention;

[0049] Figure 5 Schematic diagram of the side view structure of the movable seat of the present invention;

[0050] Figure 6 Schematic diagram of the side view structure of the fixed seat of the present invention;

[0051] Figure 7 Schematic diagram of the main sectional structure of the movable seat of the present invention;

[0052] Figure 8 Schematic diagram of the side view structure of the movable disc of the present invention;

[0053] Figure 9 Schematic diagram of the side sectional structure of the movable block of the present invention;

[0054] Figure 10 Schematic diagram of the connection structure between the movable block and the third gear of the present invention;

[0055] Figure 11 Schematic diagram of the side view structure of the driving ring of the present invention;

[0056] Figure 12 Flow chart of monitoring and analysis of the present invention;

[0057] Figure 13 Flow chart of the welding mark detection algorithm of the present invention;

[0058] Figure 14 Powder boundary detection algorithm of the present invention;

[0059] Figure 15 Flow chart of the perforation detection algorithm of the present invention.

[0060] In the figure: 1, base; 2, fixed seat; 3, movable seat; 4, threaded rod; 5, first motor; 6, CCD monitor; 7, mounting seat; 8, cleaning brush; 9, connecting block; 10, first spring; 11, first magnet; 12, second magnet; 13, second spring; 14, transmission ring; 15, first gear; 16, second motor; 17, first transmission rod; 18, second gear; 19, movable disc; 20, movable rod; 21, illuminator; 22, support plate; 23, transmission block; 24, movable block; 25, third gear; 26, mounting shaft; 27, fourth gear; 28, drive ring; 29, fifth gear; 30, third motor; 31, second transmission rod; 32, sixth gear; 33, positioning block; 34, third spring; 35, movable ball. Detailed implementation manner

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0062] Please refer to Figures 1 - 15 , the present invention provides the following technical solution: A roll welding CCD vision monitoring device for accurately detecting welding quality, including a base 1, a fixed seat 2 and a movable seat 3. The fixed seat 2 is installed above the base 1, and a movable seat 3 is arranged on the left side of the fixed seat 2.

[0063] Embodiment 1: The present invention provides the following technical solution. A mobile control mechanism is connected below the movable seat 3 to control the horizontal movement of the movable seat 3. A CCD monitor 6 is provided on the left side of the fixed seat 2 to perform visual monitoring on the welding position. An installation seat 7 is connected above the CCD monitor 6, and a transmission ring 14 is connected to the right side of the installation seat 7. A rotational connection is formed between the transmission ring 14 and the fixed seat 2. A first gear 15 meshes above the transmission ring 14, and a second motor 16 is connected to the right side of the first gear 15 to control the rotation of the first gear 15, so that the transmission ring 14 drives the CCD monitor 6 to move around the welding position. A movable rod 20 penetrates through the inside of the movable seat 3, and a support plate 22 is rotatably connected to the left end of the movable rod 20. The support plate 22 is fixed above the base 1. A lighting device 21 is provided on the right side of the movable rod 20, and the lighting device 21 and the CCD monitor 6 are arranged opposite to each other. A rotation control mechanism is connected to the outside of the movable rod 20 to control the movable rod 20 to rotate together with the CCD monitor 6. Workpiece positioning mechanisms are provided on the inner sides of both the movable seat 3 and the fixed seat 2 to provide a positioning and supporting effect for the seam welding workpieces. The mobile control mechanism includes a threaded rod 4 and a first motor 5. The threaded rod 4 penetrates through the lower part of the movable seat 3 and forms a threaded connection with the movable seat 3. A left-right sliding structure is formed between the lower end of the movable seat 3 and the base 1. The first motor 5 is connected to the threaded rod 4 to control the rotation of the threaded rod 4.

[0064] When in use, the seam welding product to be monitored can be passed through the fixed seat 2, and its left end is connected to the movable seat 3. The product can be driven to move by the movement of the movable seat 3, or the movable seat 3 can be moved by itself during product processing for mutual cooperation. During monitoring, the welding position is detected by the CCD monitor 6, and the data is analyzed and processed. A marking machine can also be provided on the outside of the device, and relevant markings can be made after the monitoring is completed. During monitoring, the CCD monitor 6 can move around the welding position with the rotation of the transmission ring 14 to monitor different welding positions. At the same time, the lighting device 21 can provide lighting inside the welding position to facilitate the monitoring of the CCD monitor 6, and the lighting device 21 can rotate and move synchronously with the CCD monitor 6 through the movable rod 20 to maintain its consistency. When the movable seat 3 is controlled to move by the threaded rod 4, the movable rod 20 can slide inside the movable seat 3.

[0065] Regarding the analysis and processing of the visual data monitored by the CCD monitor 6, deploy the CCD monitor 6 so that the camera can collect clear images. Deploy the software running environment on the upper computer, install the software, input the device activation code, and the system will automatically detect the successfully configured and connected cameras. When the device starts running, the upper computer automatically triggers the camera to collect when receiving the high-level trigger signal sent by the encoder. The collected images are sent to the upper computer and start working according to the system process shown. Figure 12 shown

[0066] The flow chart of the welding mark detection algorithm is as Figure 13 shown. "Image input" is the grayscale image after image preprocessing in Figure 12 and has undergone ROI region segmentation. Different algorithms can customize the ROI region to improve the accuracy of the algorithm. "Morphological calculation" is to further remove noise and magnify the feature points of the image to facilitate subsequent operations on the "connected regions" of the welding marks. After generating the circumscribed rectangle frame, the point set array cannot be directly used. The reason is that there may be incomplete welding mark regions at the head and tail of each frame of the image. To remove the influence of these welding marks, it is first necessary to remove the data at both ends, and then divide it into left and right boundary point sets according to the abscissa of the midline, and then generate two different linear equations, which are cached and displayed on the original image at the same time.

[0067] The powder material boundary detection algorithm is as Figure 14 shown. This algorithm generates two sets of available data, and the results of data analysis can obtain different results according to different statistical methods, which is convenient for subsequent data analysis of quality discrimination and multi-level data statistics.

[0068] The flow chart of the perforation detection algorithm is as Figure 15 shown. The light source irradiates the back of the material. Therefore, if there is a perforation in the welding mark, the camera can capture bright spots in the welding mark area. According to this characteristic, only simple "threshold segmentation" is required to obtain the feature image. This algorithm judges whether the section of the material meets the "perforation NG standard" by comparing the ratio of the perforation area of the welding mark to the overall welding mark area. If the perforation area ratio exceeds the preset value, it is NG, and the labeling machine will stick a label paper at the beginning and end of this section of the material for subsequent manual secondary inspection, which can improve the efficiency and accuracy of welding quality detection, reduce the workload of manual inspection, monitor the running state of the seam welding equipment in real time and intuitively, and reflect the life state of worn parts.

[0069] Embodiment 2: On the basis of Embodiment 1, it is disclosed that an auxiliary cleaning mechanism is provided on the outer side of the mounting seat 7 for cleaning during the monitoring of the welding joint. The auxiliary cleaning mechanism includes a cleaning brush 8, a connecting block 9, a first spring 10 and a moving mechanism. The cleaning brush 8 is arranged at the rear side of the mounting seat 7. The connecting block 9 is arranged above the cleaning brush 8, and the upper end of the cleaning brush 8 penetrates between the connecting block 9 to form an up-and-down sliding structure. The first spring 10 is arranged above the cleaning brush 8 to provide a downward pulling force for the cleaning brush 8. The moving mechanism is connected to the connecting block 9 to drive the connecting block 9 to move. The moving mechanism includes a first magnet 11, a second magnet 12 and a second spring 13. The first magnet 11 is fixed on the right side of the connecting block 9, and a left-and-right sliding structure is formed between the first magnet 11 and the mounting seat 7. The second magnet 12 is fixed on the left side of the fixed seat 2, and the second magnets 12 are equally angularly distributed around the center of the transmission ring 14, and the second magnet 12 and the first magnet 11 attract each other when they face each other. The second spring 13 is arranged on the right side of the connecting block 9 to provide a reset thrust for the connecting block 9.

[0070] When the mounting seat 7 drives the CCD monitor 6 to move, the cleaning brush 8 will move synchronously. When the cleaning brush 8 moves, the first magnet 11 and the second magnet 12 face each other intermittently. Cooperating with the second spring 13, the cleaning brush 8 can reciprocate, improving its cleaning effect. And cooperating with the acting force provided by the first spring 10, the cleaning brush 8 can keep effective contact with the welded product.

[0071] Embodiment 3: On the basis of embodiment 1, a rotation control mechanism is disclosed, including a first transmission rod 17, a second gear 18, a movable disk 19 and a transmission block 23. The first transmission rod 17 is fixed to the left side of the first gear 15, and the left end of the first transmission rod 17 passes through the movable seat 3 and the movable seat 3 forms a nested structure. The second gear 18 is arranged on the outside of the first transmission rod 17 and between the first transmission rod 17 to form a left-right sliding structure, and the second gear 18 is arranged inside the movable seat 3, and the second gear 18 and the movable seat 3 form a rotation connection. The movable disk 19 is arranged below the second gear 18 and between the second gear 18 to form a meshing connection, and the movable disk 19 and the movable seat 3, a movable rod 20 passes through the movable disk 19 and the movable disk 19 to form a left-right sliding structure, and the size of the movable disk 19 is the same as the size of the transmission ring 14 and the size of the first gear 15 and the second gear 18. The transmission block 23 is arranged inside the second gear 18 and the movable disk 19 and is connected to the first transmission rod 17 and the movable rod 20 respectively. The workpiece positioning mechanism includes a movable block 24, a third gear 25, a mounting shaft 26, a fourth gear 27, a drive ring 28 and a synchronous control mechanism. The movable block 24 is distributed at equal angles on the inner side of the fixed seat 2 and the movable seat 3, and the movable block 24 and the fixed seat 2 and the movable seat 3 are respectively connected to each other by sliding, and the third gear 2 5, arranged on the outer side of the movable block 24 and the movable block 24 to form a meshing connection, the installation shaft 26 is fixed in the middle of the third gear 25, and the installation shaft 26 and the fixed seat 2 and the movable seat 3 are respectively connected to form a rotation connection, the fourth gear 27 is fixed on the surface of the installation shaft 26 and is staggered with the third gear 25, the driving ring 28 is arranged on the outer side of the fourth gear 27 and the fourth gear 27 to form a meshing connection, the synchronous control mechanism is connected to the driving ring 28 to control the rotation of the driving ring 28, the end of the movable block 24 is embedded with a positioning block 33, and the outer end of the positioning block 33 is fixed with a third spring 34 to provide thrust for the positioning block 33, and the positioning block 33 located in the middle of the movable seat 3 A movable ball 35 is provided at the inner end, and the fifth gear 29, the third motor 30, the second transmission rod 31 and the sixth gear 32 of the synchronous control mechanism are provided. The fifth gear 29 is provided inside the fixed seat 2, and the fifth gear 29 and the driving ring 28 in the fixed seat 2 are meshed with each other. The third motor 30 is connected to the fifth gear 29 to control the rotation of the fifth gear 29. The second transmission rod 31 is fixed on the left side of the fifth gear 29, and the left end of the second transmission rod 31 passes through the movable seat 3 and the movable seat 3 forms a nested connection. The sixth gear 32 is provided inside the movable seat 3 and is meshed with the driving ring 28 in the movable seat 3, and a horizontal sliding structure is formed between the sixth gear 32 and the second transmission rod 31.

[0072] When controlling the rotation of the transmission ring 14, the first gear 15 is driven to rotate by the second motor 16. The first gear 15 drives the transmission ring 14 to rotate through meshing with the transmission ring 14. At the same time, the first gear 15 drives the second gear 18 to rotate through the first transmission rod 17. The second gear 18 drives the movable rod 20 to rotate through meshing with the movable disk 19, so that the movable rod 20 drives the illuminator 21 and the CCD monitor 6 to move synchronously. When using the movable block 24 product for support and positioning, the fifth gear 29 can be controlled to rotate by the third motor 30. The fifth gear 29 drives the sixth gear 32 to rotate through the second transmission rod 31, driving the driving ring 28 engaged with it to rotate. The driving ring 28 drives the mounting shaft 26 and the third gear 25 to rotate through meshing with the fourth gear 27. The third gear 25 will drive the movable block 24 to move, synchronously controlling the expansion and contraction of the movable block 24, so that it can support and position the product.

[0073] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0074] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A CCD visual monitoring device for accurately detecting welding quality of roll welding, comprising a base (1), a fixed base (2) and a movable base (3), wherein the fixed base (2) is installed above the base (1), and the movable base (3) is arranged on the left side of the fixed base (2); It is characterized in that: A moving control mechanism is connected to the bottom of the movable seat (3) to control the horizontal movement of the movable seat (3). A CCD monitor (6) is arranged on the left side of the fixed seat (2) to visually monitor the welding position. A mounting seat (7) is connected to the top of the CCD monitor (6), and a transmission ring (14) is connected to the right side of the mounting seat (7). The transmission ring (14) and the fixed seat (2) are rotatably connected. A first gear (15) is meshed on the top of the transmission ring (14), and a second motor (16) is connected to the right side of the first gear (15) to control the rotation of the first gear (15) so that the transmission ring (14) drives the CCD monitor (6) to move around the welding position. The interior of the movable seat (3) is penetrated by a movable A rod (20), and the left end of the movable rod (20) is rotatably connected to a support plate (22), the support plate (22) is fixed above the base (1), an illuminator (21) is arranged on the right side of the movable rod (20), and the illuminator (21) and the CCD monitor (6) are arranged opposite to each other, and a rotation control mechanism is connected to the outer side of the movable rod (20), which controls the movable rod (20) to rotate together with the CCD monitor (6), and a workpiece positioning mechanism is arranged on the inner side of the movable seat (3) and the inner side of the fixed seat (2) to provide a positioning support effect for the roll welding workpiece, and the workpiece positioning mechanism includes a movable block (24), a third gear (25), a mounting shaft (26), a fourth gear (27), a drive ring (28) and a synchronous control mechanism; The movable blocks (24) are distributed at equal angles on the inner sides of the fixed seat (2) and the movable seat (3), and the movable blocks (24) and the fixed seat (2) and the movable seat (3) are respectively slidably connected; A third gear (25) is arranged on the outer side of the movable block (24) and is meshedly connected with the movable block (24); The mounting shaft (26) is fixed to the middle of the third gear (25), and the mounting shaft (26) and the fixed seat (2) and the movable seat (3) are respectively connected in rotation; A fourth gear (27) is fixed on the surface of the mounting shaft (26) and is staggered with the third gear (25); A drive ring (28) is arranged on the outer side of the fourth gear (27) and is meshedly connected with the fourth gear (27); A synchronous control mechanism connected to the driving ring (28) to control the rotation of the driving ring (28); The rotation control mechanism comprises a first transmission rod (17), a second gear (18), a movable plate (19) and a transmission block (23); A first transmission rod (17) is fixed on the left side of the first gear (15), and the left end of the first transmission rod (17) passes through the movable seat (3) and the movable seat (3) to form a nested structure; The second gear (18) is arranged between the outside of the first transmission rod (17) and the first transmission rod (17) to form a left - right sliding structure. The second gear (18) is arranged inside the movable seat (3), and a rotational connection is formed between the second gear (18) and the movable seat (3). The movable disk (19) is arranged below the second gear (18) and forms a meshing connection with the second gear (18). A rotational connection is formed between the movable disk (19) and the movable seat (3). The movable rod (20) penetrates through the movable disk (19) to form a left - right sliding structure between them. The size of the movable disk (19) is the same as the size of the transmission ring (14) and the sizes of the first gear (15) and the second gear (18). The transmission block (23) is arranged inside the second gear (18) and the movable disk (19) and is connected to the first transmission rod (17) and the movable rod (20) respectively.

2. The roll welding CCD vision monitoring device for accurately detecting welding quality according to claim 1, characterized in that: The movement control mechanism includes a threaded rod (4) and a first motor (5). The threaded rod (4) penetrates through the lower part of the movable seat (3) to form a threaded connection with the movable seat (3). A left - right sliding structure is formed between the lower end of the movable seat (3) and the base (1). The first motor (5) is connected to the threaded rod (4) to control the rotation of the threaded rod (4).

3. The seam welding CCD vision monitoring device for precisely detecting welding quality according to claim 1, wherein: An auxiliary cleaning mechanism is arranged on the outside of the mounting seat (7) to clean during the monitoring of the welding joint.

4. The seam welding CCD vision monitoring device for precisely detecting welding quality according to claim 3, wherein: The auxiliary cleaning mechanism includes a cleaning brush (8), a connecting block (9), a first spring (10) and a moving mechanism. The cleaning brush (8) is arranged at the rear side of the mounting seat (7). The connecting block (9) is arranged above the cleaning brush (8). The upper end of the cleaning brush (8) penetrates through the connecting block (9) to form an up - down sliding structure between them. The first spring (10) is arranged above the cleaning brush (8) to provide a downward pulling force for the cleaning brush (8). The moving mechanism is connected to the connecting block (9) to drive the connecting block (9) to move.

5. The seam welding CCD vision monitoring device for precisely detecting welding quality according to claim 4, wherein: The moving mechanism includes a first magnet (11), a second magnet (12) and a second spring (13). The first magnet (11) is fixed on the right side of the connecting block (9), and a left - right sliding structure is formed between the first magnet (11) and the mounting seat (7). The second magnet (12) is fixed on the left side of the fixed seat (2), and the second magnets (12) are equally angularly distributed around the center of the transmission ring (14). The second magnet (12) and the first magnet (11) attract each other when they face each other. The second spring (13) is arranged on the right side of the connecting block (9) to provide a reset thrust for the connecting block (9).

6. The seam welding CCD vision monitoring device for precisely detecting welding quality according to claim 1, characterized in that: The end of the movable block (24) is nested with a positioning block (33). The outer end of the positioning block (33) is fixed with a third spring (34) to provide a thrust for the positioning block (33). An activity ball (35) is arranged at the inner end of the positioning block (33) located in the middle of the movable seat (3).

7. The seam welding CCD vision monitoring device for precisely detecting welding quality according to claim 1 or 6, characterized in that: The synchronous control mechanism includes a fifth gear (29), a third motor (30), a second transmission rod (31) and a sixth gear (32). The fifth gear (29) is arranged inside the fixed seat (2), and the fifth gear (29) meshes with the drive ring (28) inside the fixed seat (2); The third motor (30) is connected to the fifth gear (29) to control the rotation of the fifth gear (29); The second transmission rod (31) is fixed to the left side of the fifth gear (29), and the left end of the second transmission rod (31) penetrates through the movable seat (3) to form a nested connection between the second transmission rod (31) and the movable seat (3); The sixth gear (32) is arranged inside the movable seat (3) and meshes with the drive ring (28) inside the movable seat (3), and a horizontal sliding structure is formed between the sixth gear (32) and the second transmission rod (31).

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