Roll welding CCD visual monitoring equipment capable of accurately detecting welding quality

Abstract

The invention discloses roll welding CCD visual monitoring equipment capable of accurately detecting welding quality, and relates to the field of welding monitoring, the roll welding CCD visual monitoring equipment comprises a base, a fixed seat and a movable seat, the fixed seat is mounted above the base, the movable seat is arranged on the left side of the fixed seat, a movement control mechanism is connected below the movable seat, and the movement control mechanism is connected with the movable seat. The horizontal movement of the movable base is controlled, a CCD monitor is arranged on the left side of the fixed base and used for conducting visual monitoring on the welding position, the upper portion of the CCD monitor is connected with an installation base, and the right side of the installation base is connected with a transmission ring. According to the roll welding CCD visual monitoring equipment capable of accurately detecting the welding quality, the movable seat is matched with the fixed seat to provide support for a welding product, the welded product can move in cooperation with movement of the movable seat, the welding monitoring position is adjusted, the CCD monitor can move around the welding product, the monitoring position is changed, and the welding quality is accurately detected. And the product after welding output can be monitored, and monitoring can also be carried out after product welding is completed.

Description

Technical Field

[0001] The invention relates to the technical field of welding monitoring, and in particular to a roll welding CCD visual monitoring device for accurately detecting welding quality. Background Art

[0002] The principle of the roll welding machine is to weld metal pole pieces together through high-frequency vibration, leaving a weld mark on the side of the pole ear. The shape of the weld mark is generally square or triangular, depending on the different tooth patterns of the welding head. In the past, whether the welding is qualified was manually identified by sampling from the coil. The manual inspection methods include direct observation with a magnifying glass, checking whether the weld mark is perforated by strong light, measuring the maximum peeling force of the pole ear with a tensile gauge, and measuring the resistance value on both sides of the weld mark.

[0003] The purpose of visual inspection is to extract the characteristic values ​​in the image to realize data quantification, and then judge the quality of welding by subsequent data processing. However, the above-mentioned manual sampling inspection method cannot detect the operating status of the equipment in real time, and cannot observe the life status of the welding head and welding seat to make timely adjustments to the formula or replace the hardware equipment. The qualified rate of the sampling inspection method cannot represent the qualified rate of the entire roll, especially for continuous materials. And the manual inspection method will inevitably destroy the materials to be inspected, resulting in unnecessary waste of raw materials. Therefore, it is necessary to add a CCD visual inspection system at the welding point to replace part of the manual inspection work. It aims to improve the accuracy of quality inspection and further realize the intelligent production line.

[0004] Prior art 1 (publication number CN219787068U, Chinese patent 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, the lifting mechanism, a rotating motor is provided at the top of the lifting mechanism, a lateral telescopic mechanism is provided at the top of the rotating motor, a multi-directional angle adjustment mechanism is provided on the side of the lateral telescopic mechanism away from the rotating motor, and a scanning monitoring ring is provided on the side of the multi-directional angle adjustment mechanism away from the lateral telescopic mechanism. The utility model installs it at a suitable required position through the mounting frame, and then The height adjustment is realized by the lifting mechanism, the rotation adjustment is realized by the rotating motor, the lateral telescopic length is changed by the lateral telescopic mechanism, the arbitrary direction and angle are changed by the multi-directional angle adjustment mechanism, and the crocodile scanning monitoring camera in the scanning monitoring ring is used to monitor it, replacing manual monitoring, thereby realizing efficient monitoring and greatly improving the monitoring efficiency; Prior art 2 (publication number CN105855757A, Chinese patent published on August 17, 2016) A real-time online monitoring method and device for welding defects, combined with the device and method, can monitor the welding parameters online in real time. And the monitoring data is saved. At the same time, the quality of the weld can be judged by comparing the set electrical parameter standard value and the mismatch degree exceeding the standard value with the data in the defect database. The present invention can quickly and effectively monitor the parameters of automatic welding, judge and improve the quality of automatic welding.

[0005] Although current visual monitoring equipment can monitor welding, it is inconvenient to detect and move the annular welding position when targeting roll-welded parts, and it directly recognizes the surface image and cannot assist in identifying the welding quality through illumination, which reduces its overall detection accuracy and monitoring effect. Summary of the invention

[0006] The purpose of the present invention is to provide a roll welding CCD visual monitoring device for accurately detecting welding quality, so as to solve the problem that although the current visual monitoring equipment mentioned in the above background technology can realize welding monitoring, when it comes to roll welding parts, the detection and movement of the annular welding position is relatively inconvenient, and the welding quality cannot be identified directly through surface image recognition without auxiliary light.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a CCD visual monitoring device for rolling welding for accurately detecting welding quality, comprising a base, a fixed base and a movable base, wherein the fixed base is installed above the base, and a movable base is arranged on the left side of the fixed base, a mobile control mechanism is connected below the movable base to control the horizontal movement of the movable base, a CCD monitor is arranged on the left side of the fixed base to perform visual monitoring of the welding position, a mounting base is connected above the CCD monitor, and a transmission ring is connected to the right side of the mounting base, a rotational connection is formed between the transmission ring and the fixed base, and the upper part of the transmission ring is meshed with the fixed base. There is a first gear, and 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 runs through the inside of the movable seat, and the left end of the movable rod is rotatably connected to a support plate, which is fixed on the top of the base. An illuminator is arranged on the right side of the movable rod, and the illuminator and the CCD monitor are arranged opposite to each other, and a rotation control mechanism is connected to the outside of the movable rod to control the movable rod to rotate with the CCD monitor. Workpiece positioning mechanisms are arranged on the inner side of the movable seat and the inner side of the fixed seat to provide positioning and support effects for the roll welding workpiece.

[0008] To further optimize the technical solution, the movement control mechanism includes a threaded rod and a first motor; The threaded rod passes through the bottom of the movable seat and forms a threaded connection between the movable seats, and a left-right sliding structure is formed between the lower end of the movable seat and the base; The first motor is connected to the threaded rod to control the rotation of the threaded rod.

[0009] To further optimize the technical solution, an auxiliary cleaning mechanism is provided on the outer side of the mounting seat to clean the welding position during monitoring.

[0010] To further optimize the technical solution, the auxiliary cleaning mechanism includes a cleaning brush, a connecting block, a first spring and a movable mechanism; A cleaning brush is disposed on the rear side of the mounting base; The connecting block is arranged above the cleaning brush, and the upper end of the cleaning brush passes through the connecting block and forms an up-and-down sliding structure between the connecting blocks; A first spring is arranged above the cleaning brush to provide a downward pulling force for the cleaning brush; The movable mechanism is connected to the connecting block to drive the connecting block to move.

[0011] To further optimize the technical solution, the movable mechanism includes a first magnet, a second magnet and a second spring; 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; 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; The second spring is arranged on the right side of the connecting block to provide a reset thrust for the connecting block.

[0012] 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; 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; 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; 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; 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.

[0013] 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; 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; A third gear is arranged on the outer side of the movable block and is meshedly connected with the movable block; 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; A fourth gear is fixed on the surface of the mounting shaft and is staggered with the third gear; A driving ring, arranged on the outer side of the fourth gear and meshingly connected with the fourth gear; The synchronous control mechanism is connected with the driving ring to control the rotation of the driving ring.

[0014] To further optimize the 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 thrust for the positioning block, and a movable ball is provided at the inner end of the positioning block located in the middle of the movable seat.

[0015] Further optimizing the technical solution, the fifth gear, the third motor, the second transmission rod and the sixth gear of the synchronous control mechanism; A fifth gear is disposed inside the fixed seat, and the fifth gear and a driving ring inside the fixed seat are meshed with each other; A third motor is connected to the fifth gear to control the rotation of the fifth gear; A second transmission rod is fixed on the left side of the fifth gear, and the left end of the second transmission rod penetrates the movable seat and the movable seat to form a nested connection; 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.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The movable seat cooperates with the fixed seat to provide support for the welding product. The welded product can be moved in conjunction with the movement of the movable seat to adjust the welding monitoring position, and the CCD monitor can move around the welded product to change the monitoring position. The product can be monitored after welding output or after the product welding is completed.

[0017] After the product is clamped by the movable seat, it can be driven to move and the monitoring position of the product can be adjusted, which makes it more flexible to use. Both the movable seat and the fixed seat are provided with movable blocks for positioning to improve the supporting effect on the product.

[0018] The movable rod can be used in conjunction with the illuminator to provide lighting for the inside of the welding position, and the CCD monitor can be used to monitor the outside to check for light leakage, etc. The movable rod can move synchronously with the movement of the CCD monitor to adjust the lighting position so that they can adapt to each other.

[0019] The power of the transmission ring and the power between the movable disk can be transmitted through the first transmission rod, so that they can maintain synchronous rotation, thereby ensuring the consistency of subsequent lighting and monitoring positions.

[0020] The second transmission rod can synchronously control the movement of the fixed seat and the movable block in the movable seat, so that the support and positioning of the welding product can be completed synchronously, thereby improving the subsequent operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 For the present invention Figure 2 The enlarged structural diagram at a in the middle; Figure 4 It is a schematic diagram of the three-dimensional structure of the movable rod of the present invention; Figure 5 It is a schematic diagram of the side view structure of the movable seat of the present invention; Figure 6It is a schematic diagram of the side view structure of the fixing seat of the present invention; Figure 7 It is a schematic diagram of the main cross-sectional structure of the movable seat of the present invention; Figure 8 It is a schematic diagram of the side view structure of the movable disk of the present invention; Fig. 9 It is a schematic diagram of the side section structure of the movable block of the present invention; Fig.10 It is a schematic diagram of the connection structure between the movable block and the third gear of the present invention; Fig.11 It is a schematic diagram of the side view structure of the driving ring of the present invention; Fig.12 This is a monitoring and analysis flow chart of the present invention; Fig.13 This is a flow chart of the weld mark detection algorithm of the present invention; Fig.14 It is the powder boundary detection algorithm of the present invention; Fig.15 This is a flow chart of the perforation detection algorithm of the present invention.

[0022] 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 disk; 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 DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 15 The present invention provides the following technical solution: a roll welding CCD visual monitoring device for accurately detecting welding quality, 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.

[0025] Embodiment 1: The present invention provides the following technical solution, which discloses 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, and 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, a rotation connection is formed between the transmission ring 14 and the fixed seat 2, and 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, and a movable rod 20 is passed through the interior of the movable seat 3, and the left end of the movable rod 20 A support plate 22 is rotatably connected, and the support plate 22 is fixed on the top of 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 to control the movable rod 20 to rotate together with the CCD monitor 6. Workpiece positioning mechanisms are arranged on the inner side of the movable seat 3 and the inner side of the fixed seat 2 to provide positioning and support effects for the roll welding workpiece. The moving control mechanism includes a threaded rod 4 and a first motor 5. The threaded rod 4 passes through the bottom of the movable seat 3 and forms a threaded connection between the movable seat 3, and 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.

[0026] When in use, the roll-welded product to be monitored can be passed through the fixed seat 2, so that its left end is connected to the movable seat 3. The product can be moved by the movement of the movable seat 3, or the movable seat 3 can be moved and controlled by itself to cooperate with each other during product processing. 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 set on the outside of the equipment. Relevant marking can be performed 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 illuminator 21 can provide lighting inside the welding position to facilitate the monitoring of the CCD monitor 6, and the illuminator 21 can maintain synchronous rotation and movement 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 in the movable seat 3.

[0027] Regarding the analysis and processing of visual data monitored by CCD monitor 6, deploy CCD monitor 6 so that the camera can collect clear images, deploy the software running environment on the host computer, install the software, enter the device activation code, and the system will automatically detect the camera that has been successfully configured and connected. When the device starts running, the host computer receives the high-level trigger signal sent by the encoder and automatically triggers the camera to collect. The collected image is sent to the host computer through Fig.12 The system flow shown starts working.

[0028] The flow chart of the weld mark detection algorithm is as follows: Fig.13 As shown in the figure, the “image input” is Fig.12 The grayscale image is preprocessed and segmented in the ROI area. Different algorithms can customize the ROI area to improve the accuracy of the algorithm. The "morphological calculation" is to further remove noise, amplify the feature points of the image, and facilitate the subsequent operation of the "connected area" of the weld. After the external rectangular frame is generated, the point set array cannot be used directly because there may be incomplete welds at the head and tail of each frame. In order to remove the influence of these welds, the data at both ends must be removed first, and divided into left and right boundary point sets according to the horizontal coordinate of the midline, and then two different linear equations are generated and displayed on the original image while being cached.

[0029] Powder boundary detection algorithm Fig.14 As shown, the algorithm generates two sets of usable data. The results of data analysis can obtain different results according to different statistical methods, which is convenient for subsequent data analysis and multi-level data statistics for quality judgment.

[0030] The flow chart of the perforation detection algorithm is as follows: Fig.15 As shown in the figure, the light source is irradiated on the back of the material. Therefore, if there is a perforation in the weld, the camera can capture a bright spot in the weld area. Based on this feature, a simple "threshold segmentation" is required to obtain the feature image. The algorithm determines whether the section of material has reached the "perforation NG standard" by comparing the ratio of the weld perforation area to the overall weld area. If the perforation area ratio exceeds the preset value, it is NG. The marking machine will affix a label paper to the first part of the section for subsequent manual inspection, which can improve the efficiency and accuracy of welding quality inspection, reduce the workload of manual inspection, and monitor the operating status of the roll welding equipment in real time and intuitively, reflecting the life status of the wear parts.

[0031] Embodiment 2: Based on Embodiment 1, an auxiliary cleaning mechanism is disclosed, which is arranged on the outer side of the mounting seat 7 to clean the welding position during monitoring. The auxiliary cleaning mechanism includes a cleaning brush 8, a connecting block 9, a first spring 10 and a movable mechanism. The cleaning brush 8 is arranged on 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 passes through the connecting block 9 and the connecting block 9 forms 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 movable mechanism, and the connecting block 9 are connected to drive the connecting block 9 to move, the movable 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 fixing seat 2, and the second magnet 12 is distributed at equal angles with the center of the transmission ring 14 as the center of the circle, and the second magnet 12 and the first magnet 11 attract each other when they are relative, and 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.

[0032] When the mounting base 7 drives the CCD monitor 6 to move, the cleaning brush 8 will move synchronously, and when the cleaning brush 8 moves, the first magnet 11 and the second magnet 12 are intermittently opposite to each other, and the second spring 13 is cooperated to enable the cleaning brush 8 to move back and forth, thereby improving its cleaning effect, and the force provided by the first spring 10 can keep the cleaning brush 8 and the welding product in effective contact.

[0033] 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.

[0034] When the transmission ring 14 is controlled to rotate, the first gear 15 is driven to rotate by the second motor 16. The first gear 15 drives the transmission ring 14 to rotate by 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 by 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 the movable block 24 is used to support and position the product, 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, and drives the drive ring 28 meshed with it to rotate. The drive ring 28 drives the installation shaft 26 and the third gear 25 to rotate by meshing with the fourth gear 27. The third gear 25 will drive the movable block 24 to move, and synchronously control the extension and retraction of the movable block 24 so that it can support and position the product.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should 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); Features: A moving control mechanism is connected below 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 above the CCD monitor (6); and a transmission ring (14) is connected to the right side of the mounting seat (7); a rotational connection is formed between the transmission ring (14) and the fixed seat (2); a first gear (15) is meshed 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 The monitor (6) moves around the welding position, a movable rod (20) is inserted into the movable seat (3), and the left end of the movable rod (20) is rotatably connected to a support plate (22), and 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), and the movable rod (20) is controlled 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), so as to provide a positioning support effect for the roll welding workpiece.

2. The CCD visual monitoring device for accurately detecting welding quality according to claim 1 is characterized in that: The movement control mechanism comprises a threaded rod (4) and a first motor (5); A threaded rod (4) passes through the bottom of the movable seat (3) to form a threaded connection between the movable seat (3), and 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 CCD visual monitoring device for accurately detecting welding quality according to claim 1 is characterized in that: An auxiliary cleaning mechanism is provided on the outer side of the mounting seat (7) for cleaning the welding position during monitoring.

4. The CCD visual monitoring device for accurately detecting welding quality according to claim 3 is characterized in that: The auxiliary cleaning mechanism comprises a cleaning brush (8), a connecting block (9), a first spring (10) and a movable mechanism; A cleaning brush (8) is arranged on the rear side of the mounting seat (7); A connecting block (9) is arranged above the cleaning brush (8), and the upper end of the cleaning brush (8) passes through the connecting block (9) and the connecting block (9) forms an up-and-down sliding structure; A first spring (10) is arranged above the cleaning brush (8) to provide a downward pulling force for the cleaning brush (8); The movable mechanism is connected to the connecting block (9) to drive the connecting block (9) to move.

5. The CCD visual monitoring device for accurately detecting welding quality according to claim 4 is characterized in that: The movable mechanism comprises a first magnet (11), a second magnet (12) and a second spring (13); A 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 fixing seat (2), and the second magnet (12) is distributed at equal angles with the center of the transmission ring (14) as the center of the circle, and the second magnet (12) and the first magnet (11) attract each other when facing 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 CCD visual monitoring device for accurately detecting welding quality according to claim 1 is characterized in that: The rotation control mechanism comprises a first transmission rod (17), a second gear (18), a movable disk (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; A 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 a rotation connection is formed between the second gear (18) and the movable seat (3); A movable plate (19) is arranged below the second gear (18) and is meshed with the second gear (18), and the movable plate (19) and the movable seat (3) are rotatably connected, and a movable rod (20) passes through the movable plate (19) and forms a left-right sliding structure between the movable plates (19), and the size of the movable plate (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 plate (19) and is respectively connected to the first transmission rod (17) and the movable rod (20).

7. The CCD visual monitoring device for accurately detecting welding quality according to claim 1 is characterized in that: The workpiece positioning mechanism comprises a movable block (24), a third gear (25), a mounting shaft (26), a fourth gear (27), a driving 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); The synchronous control mechanism is connected to the driving ring (28) to control the rotation of the driving ring (28).

8. The CCD visual monitoring device for accurately detecting welding quality according to claim 7 is characterized in that: A positioning block (33) is nested at the end of the movable block (24), and a third spring (34) is fixed to the outer end of the positioning block (33) to provide thrust for the positioning block (33). A movable ball (35) is provided at the inner end of the positioning block (33) located in the middle of the movable seat (3).

9. A CCD visual monitoring device for accurately detecting welding quality according to claim 7 or 8, characterized in that: The synchronous control mechanism comprises a fifth gear (29), a third motor (30), a second transmission rod (31) and a sixth gear (32); A fifth gear (29) is arranged inside the fixing seat (2), and the fifth gear (29) and the driving ring (28) inside the fixing seat (2) are meshed with each other; A third motor (30) is connected to the fifth gear (29) to control the rotation of the fifth gear (29); A 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) passes through the movable seat (3) and the movable seat (3) forms a nested connection; The sixth gear (32) is arranged inside the movable seat (3) and meshes with the driving 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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