A container body laser welding device and a welding seam quality detection method

Abstract

The application relates to the technical field of mechanical manufacturing, in particular to a container body laser welding device, which comprises a driving table, a slidable sliding support arm is installed on the left side of the driving table, a driving seat is longitudinally and slidably arranged on the sliding support arm, and a U-shaped limiting sliding seat is installed on the driving seat. The container body laser welding device is cooperatively matched with the second frequency conversion motor, the sector plate, the arc-shaped rack and the transmission gear shaft rod, the angle of the laser welding machine can be automatically deflected and adjusted, the inclination angles of the concave inclined surface and the convex inclined surface can be accurately adapted, the welding end is always perpendicular to the welding seam surface, the problem of poor angle adaptability of the traditional device is completely solved, and defects such as air holes and incomplete fusion are effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing technology, specifically to the category of container production and processing equipment, and particularly to a laser welding device suitable for the concave and convex surface structure of container bodies, used to solve the problem of high-precision and automated welding of isosceles trapezoidal staggered concave and convex surface plates. Background Technology

[0002] As a core piece of equipment in logistics transportation, the structural strength of container bodies directly determines transportation safety and service life. To enhance structural rigidity, container body panels generally employ a design of multiple isosceles trapezoidal concave and convex surfaces, forming a continuous alternating structure of concave planes, concave inclined planes, convex planes, and convex inclined planes. Laser welding, due to its advantages such as concentrated energy, high weld strength, and minimal thermal deformation, has gradually replaced traditional electric welding processes in container manufacturing. However, existing laser welding equipment faces significant technical challenges in practical applications: Poor angle adaptability: Traditional laser welding machines are mostly fixed-angle or manually adjustable, which cannot adapt to the tilt changes of concave and convex surfaces. This makes it difficult to keep the welding end perpendicular to the weld surface, which easily leads to defects such as uneven penetration, porosity, and lack of fusion, which seriously affect the weld strength and sealing performance. Low welding efficiency: Existing equipment requires frequent shutdowns to adjust welding angles and positions, and cannot achieve continuous welding of concave and convex surfaces. Especially for isosceles trapezoidal staggered structures, segmented welding leads to cumbersome processes and long production cycles. Insufficient operational stability: Frequent problems such as equipment vibration and sliding deviation occur during the welding process, and the lack of effective limiting and buffering mechanisms further aggravates welding accuracy deviations; Limited versatility: The dimensions and tilt angles of the concave and convex surfaces of the component plates of different container specifications vary. The existing equipment has a limited range of angle adjustment, making it difficult to adapt to the production of multiple product models and increasing equipment investment costs. Insufficient reset accuracy: The reset process after the laser welding machine switches angles lacks stable control, which can easily lead to defects at the weld joint due to uneven reset speed, affecting the overall welding quality. The aforementioned problems make it difficult for existing laser welding equipment to balance precision, efficiency, and versatility in welding concave and convex surfaces of containers, thus hindering the automation upgrade of container production and the improvement of product quality. Therefore, there is an urgent need for a special device with angle self-adaptation, stable operation, and efficient continuous welding functions. Summary of the Invention

[0003] The purpose of this invention is to provide a container laser welding device and its usage method to solve the problem of poor angle adaptability of existing devices mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: A container laser welding device includes a drive table, a sliding support arm mounted on the left side of the drive table, a drive seat slidably mounted on the sliding support arm, a U-shaped limiting slide mounted on the drive seat, and a slide plate for supporting a welding actuator slidably connected to the U-shaped limiting slide; a deflection shaft seat is fixedly connected to the side of the slide plate facing the sliding support arm, a rotating shaft is rotatably connected in the shaft hole of the deflection shaft seat, a damping return spring telescopic plate with controllable reset rate is rotatably sleeved on the top side of the rotating shaft, a laser welding machine is hinged to the end of the damping return spring telescopic plate away from the rotating shaft, a transmission gear shaft is fixedly connected to the bottom of the laser welding machine, and the transmission gear shaft is damped and rotatably connected to the top surface of the slide plate to achieve controllable deflection of the laser welding machine angle; A first drive variable frequency motor is installed on the bottom surface of the U-shaped limiting slide. The rotating shaft of the first drive variable frequency motor is located inside the U-shaped limiting slide, and a first hinge plate is fixedly connected to the upper end of the rotating shaft. A sliding frame is hinged to the end of the first hinge plate away from the first drive variable frequency motor. The sliding frame has a racetrack-shaped cavity inside, with teeth on the two semicircular sections of its inner wall that are adapted to the gear ring. The gear ring is fixedly sleeved on the transmission gear shaft. The locking and translation linkage of the transmission gear shaft is achieved by the left and right movement of the sliding frame and the meshing of the teeth with the gear ring.

[0004] Preferably, a second drive variable frequency motor is fixedly connected to the front side of the top of the slide plate, and a second hinge plate is fixedly connected to the top of the second drive variable frequency motor. A connecting shaft is rotatably connected to the end of the second hinge plate away from the second drive variable frequency motor. The sector plate is rotatably connected to the rotating shaft to form a deflection drive base. An arc-shaped rack is slidably connected to the upper limit of the arc edge of the sector plate. The arc-shaped rack meshes with the transmission gear shaft. Both ends of the arc edge of the sector plate are fixedly connected to baffles. By reciprocating deflection of the sector plate, the baffles alternately push the arc-shaped rack, thereby realizing the forward and reverse rotation of the transmission gear shaft to adapt to the welding angle of the concave and convex surfaces.

[0005] Preferably, a spring-loaded telescopic buffer plate is hinged between the first hinge plate and the sliding frame to absorb the impact load during the transmission process of the first drive variable frequency motor, ensuring the smooth movement of the sliding frame.

[0006] Preferably, an arc-shaped guide groove is provided on the inner side of the sector plate, and the connecting shaft is located in the arc-shaped guide groove. The arc-shaped guide groove limits the deflection trajectory and angle range of the sector plate.

[0007] Preferably, the sliding frame is provided with limiting plates on both the front and rear sides for limiting sliding. The two limiting plates are fixed on the front and rear sides of the U-shaped limiting slide block, and the slide plate is located between the limiting plates and the U-shaped limiting slide block, forming a two-way limiting and guiding structure for the slide plate.

[0008] Preferably, a first hook plate is fixedly connected to the right side of the sliding frame, and the first hook plate slides in the first push groove on the right side of the slide plate; a second hook plate is fixedly connected to the left side of the sliding frame, and the second hook plate slides in the second push groove on the left side of the slide plate.

[0009] Preferably, the upper and lower ends of the connecting shaft are threaded with locking nuts, and the two locking nuts abut against the upper and lower end faces of the sector plate respectively, to lock the position of the connecting shaft in the arc-shaped guide groove so as to adjust the deflection stroke of the sector plate.

[0010] Preferably, the drive seat is composed of a slider and a C-shaped plate hinged together. The slider slides on the sliding support arm, and the C-shaped plate is fixedly connected to the U-shaped limiting slide. A locking rod is provided between the C-shaped plate and the slider. The angle adjustment and locking of the U-shaped limiting slide are realized through the cooperation of the hinge structure and the locking rod.

[0011] Preferably, a drive cylinder is fixedly connected to the drive base, and the drive cylinder is fixed on the sliding support arm to drive the drive base to perform high-precision longitudinal displacement along the sliding support arm.

[0012] A method for inspecting the weld quality of a laser welding device for container bodies includes the following steps: S1. The scanning inspection should follow the sequence of "concave plane → concave inclined plane → convex plane → convex inclined plane". The scanning camera should be installed in the laser welding machine position, and the end of the scanning camera lens should always be perpendicular to the inspection surface and move along the concave and convex surfaces. S2, Concave plane scanning: The first frequency conversion motor, together with the first hinge plate, pushes the sliding frame to the right. After the teeth on the left side of its inner wall come into contact with the gear ring, it drives the scanning camera and the slide plate to approach the concave plane. After moving to the maximum distance, the sliding arm moves forward along the drive stage, driving the scanning camera to complete the concave plane scanning. S3. Concave Inclined Surface Scanning: During the forward movement of the sliding arm, the first frequency conversion motor pulls the sliding frame to the left to reset, and the left teeth separate from the gear ring; at the same time, the second frequency conversion motor drives the fan-shaped plate to deflect counterclockwise, the front baffle squeezes the arc-shaped rack, and drives the transmission gear shaft to rotate clockwise, so that the scanning camera is perpendicular to the concave inclined surface; then the sliding frame moves to the left, and the right teeth lock the rotated gear ring, and the scanning camera is pulled to the left in sync, which completes the concave inclined surface scanning in conjunction with the forward movement of the sliding arm; S4. Convex plane scanning: The sliding frame moves to the left to the maximum distance and then moves to the right, separating the right teeth from the tooth ring; the damping reset spring telescopic plate retracts to reset the scanning camera, making it perpendicular to the convex plane, and then the sliding arm moves forward to complete the convex plane scanning. S5. Convex Inclined Surface Scanning: When the scanning camera moves to the front end of the convex plane, the second frequency conversion motor drives the fan-shaped plate to deflect clockwise, and the rear baffle pushes the arc-shaped rack, driving the transmission gear shaft to rotate counterclockwise, so that the scanning camera is perpendicular to the convex inclined surface; then the sliding frame moves to the right, and the left tooth locks the gear ring, simultaneously pushing the scanning camera to the right, and cooperating with the sliding support arm to move forward to complete the convex inclined surface scanning.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention: Angle-adaptive precision welding: Through the coordinated operation of the second variable frequency motor, the sector plate, the arc rack and the transmission gear shaft, the angle of the laser welding machine is automatically adjusted. It can accurately adapt to the tilt angle of concave and convex slopes, ensuring that the welding end is always perpendicular to the weld surface. This completely solves the problem of poor angle adaptability of traditional devices and effectively avoids defects such as porosity and incomplete fusion.

[0014] This invention improves efficiency through continuous welding: The integrated locking and translation design of the sliding frame and toothed ring, combined with the forward movement of the sliding support arm, enables continuous welding from concave plane to concave inclined plane to convex plane to convex inclined plane, without the need for machine stoppage for adjustment, ensuring welding efficiency and significantly shortening the production cycle. This invention significantly enhances operational stability: the bidirectional limiting plate limits the sliding frame, and the first and second hook plates respectively engage with the pushing groove to form a multi-stabilizing structure, effectively suppressing vibration and offset during the welding process; the spring telescopic buffer plate absorbs transmission impact, and the damped reset spring telescopic plate ensures uniform reset speed. The dual buffer mechanism further improves the operational stability of the equipment and welding accuracy.

[0015] This invention features strong versatility and adaptability to multiple scenarios: the drive seat adopts a slider and C-shaped clamping plate hinge structure, and the angle is locked by a locking rod, which can flexibly adjust the welding tilt; the position of the connecting shaft in the guide groove of the sector plate can be locked by a nut, realizing flexible adaptation of the welding angle adjustment range, meeting the welding requirements of different specifications of container assembly plates, and reducing the investment cost of equipment versatility.

[0016] This invention offers convenient operation and equipment protection: the entire welding process is automated through variable frequency motor drive, enabling angle switching and position movement, reducing manual intervention and operational difficulty; the angle locking and translation linkage design prevents the laser welding machine from unexpectedly resetting, and the spring telescopic buffer plate and damping structure effectively protect the laser welding machine and transmission components, extending the equipment's service life. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the deflection shaft seat and the rotation shaft of the present invention; Figure 3This is a three-dimensional structural diagram of the second variable frequency motor and the second hinge plate of the present invention; Figure 4 This is a three-dimensional structural diagram of the second variable frequency motor and the sliding plate in a vertically separated state according to the present invention; Figure 5 This is a three-dimensional structural diagram of the sliding frame and the sliding plate in a vertically separated state according to the present invention; Figure 6 This is a three-dimensional structural diagram of the toothed ring and sliding frame in a vertically separated state according to the present invention.

[0018] In the diagram: 1. Drive platform; 2. Sliding arm; 3. U-shaped limiting slide; 4. Slide plate; 41. Deflection shaft seat; 42. Rotation shaft; 43. Damping reset spring telescopic plate; 44. Laser welding machine; 45. Transmission gear shaft; 5. First variable frequency motor; 51. First hinge plate; 52. Sliding frame; 53. Tooth; 54. Gear ring; 55. Limiting plate; 56. First hook plate; 57. First push groove; 58. Second hook plate; 59. Second push groove; 510. Spring telescopic buffer plate; 6. Second variable frequency motor; 61. Second hinge plate; 62. Connecting shaft; 63. Fan-shaped plate; 64. Guide groove; 65. Arc-shaped rack; 66. Baffle; 67. Nut; 7. Drive seat; 71. Slider; 72. C-shaped clamping plate; 73. Locking rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 6 This invention provides a technical solution: a container body laser welding device, including a drive platform 1, a sliding support arm 2 installed on the left side of the drive platform 1, a drive seat 7 slidably mounted on the sliding support arm 2, a U-shaped limiting slide 3 installed on the drive seat 7, a slide plate 4 slidably connected to the U-shaped limiting slide 3, a deflection shaft seat 41 fixedly connected to the side of the slide plate 4 facing the sliding support arm 2, a rotating shaft 42 rotatably connected in the shaft hole of the deflection shaft seat 41, a damping return spring telescopic plate 43 rotatably sleeved on the top side of the rotating shaft 42, a laser welding machine 44 hinged to the end of the damping return spring telescopic plate 43 away from the rotating shaft 42, a transmission gear shaft 45 fixedly connected to the bottom of the laser welding machine 44, and the transmission gear shaft 45 damped rotatably connected to the top surface of the slide plate 4; the damping return spring telescopic plate 43 ensures the uniformity of the reset speed of the laser welding machine 44.

[0021] The bottom surface of the U-shaped limiting slide block 3 is equipped with a first variable frequency motor 5. The rotating shaft of the first variable frequency motor 5 is located inside the U-shaped limiting slide block 3, and the upper end of the rotating shaft of the first variable frequency motor 5 is fixedly connected to a first hinge plate 51. A spring telescopic buffer plate 510 is hinged to the end of the first hinge plate 51 away from the rotating shaft of the first variable frequency motor 5. A sliding frame 52 is fixedly connected to the end of the spring telescopic buffer plate 510 away from the first hinge plate 51. The interior of the sliding frame 52 is racetrack-shaped. Teeth 53 are provided on the two semi-circular inner walls of the inner wall of the sliding frame 52. There is a toothed ring 54 inside the sliding frame 52, which is fixedly sleeved on the transmission gear shaft 45. When the sliding frame 52 moves to the right and engages with the left-side teeth 53 inside to lock the counterclockwise rotated transmission gear shaft 45, it pushes the transmission gear shaft 45 and the laser welding machine 44 on it to the right. With the cooperation of the sliding support arm 2, the convex inclined surface of the assembly plate can be welded. When the sliding frame 52 moves to the left and does not lock the transmission gear shaft 45, the laser welding machine 44 is perpendicular to the concave plane of the assembly plate and engages with the sliding support arm 2 to move forward to weld the concave plane of the assembly plate. When the right-side teeth 53 inside the sliding frame 52 moves to the left and locks the clockwise deflected transmission gear shaft 45, it pulls the transmission gear shaft 45 and the laser welding machine 44 on it to the left. With the cooperation of the sliding support arm 2, the concave inclined surface of the assembly plate can be welded.

[0022] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the sliding frame 52 is provided with limiting plates 55 on both the front and rear sides, and the two limiting plates 55 are fixed on the front and rear sides of the U-shaped limiting slide block 3 respectively; the limiting plates 55 ensure the stability of the slide plate 4 sliding on the U-shaped limiting slide block 3.

[0023] A first hook plate 56 is fixedly connected to the right side of the sliding frame 52. The first hook plate 56 slides in the first push groove 57 opened on the right side of the slide plate 4. A second hook plate 58 is fixedly connected to the left side of the sliding frame 52. The second hook plate 58 slides in the second push groove 59 opened on the left side of the slide plate 4. When the sliding frame 52 moves to the right, it engages with the internal left teeth 53 to lock the counterclockwise rotated transmission gear shaft 45. At this time, the second hook plate 58 slides in the second push groove 59 and abuts against one side of the inner wall of the second push groove 59, helping the sliding frame 52 to push the transmission gear shaft 45 to the right, ensuring the stability of the slide plate 4 sliding on the U-shaped limiting slide block 3. Similarly, by the first hook plate 56 abutting against the first push groove 57, the sliding frame 52 helps pull the transmission gear shaft 45 to the left.

[0024] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4, Figure 5 and Figure 6 As shown, a second variable frequency motor 6 is fixedly connected to the front side of the top surface of the slide plate 4. A second hinge plate 61 is fixedly connected to the top of the second variable frequency motor 6. A connecting shaft 62 is rotatably connected to the end of the second hinge plate 61 away from the second variable frequency motor 6. The connecting shaft 62 is located in the guide groove 64 opened inside the sector plate 63. The sector plate 63 is rotatably connected to the rotating shaft 42. Both ends of the connecting shaft 62 are threaded with nuts 67, and the two nuts 67 abut against the two end faces of the sector plate 63; thus locking the position of the connecting shaft 62 in the guide groove 64.

[0025] An arc-shaped rack 65 is slidably connected to the upper limit of the arc-shaped edge of the sector plate 63. The arc-shaped rack 65 meshes with the transmission gear shaft 45. Both ends of the arc-shaped edge of the sector plate 63 are fixedly connected to the baffles 66 by screws, and the baffles 66 can be adjusted in position on the arc-shaped edge of the sector plate 63. The second variable frequency motor 6 cooperates with the second hinge plate 61 to drive the sector plate 63 to reciprocate and deflect. Through the two baffles 66, the arc-shaped rack 65 is pushed intermittently, causing the transmission gear shaft 45 and the laser welding machine 44 on it to deflect, so as to ensure that the laser welding machine 44 is in contact with the concave and convex inclined surfaces of the plate.

[0026] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the slide plate 4 is located between the limiting plate 55 and the U-shaped limiting slide block 3.

[0027] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a drive cylinder is fixedly connected to the drive base 7, and the drive cylinder is fixed to the sliding support arm 2. The drive base 7 is moved up and down by the drive cylinder.

[0028] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the drive base 7 is composed of a slider 71 and a C-shaped clamping plate 72 hinged together. The slider 71 slides on the sliding support arm 2, and the C-shaped clamping plate 72 is fixedly connected to the U-shaped limiting slide 3. A locking rod 73 is provided between the C-shaped clamping plate 72 and the slider 71. The angle between the C-shaped clamping plate 72 and the slider 71 is adjusted by the C-shaped clamping plate 72, and the angle is locked by the locking rod 73 to ensure that the welding inclination remains stable during longitudinal sliding.

[0029] The weld quality inspection method and advantages of the present invention: The working process of this container laser welding device is as follows: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 As shown, when the device welds the container body, it first assembles the component plates and completes the spot welding. The surface of the component plate is composed of multiple isosceles trapezoidal concave and convex surfaces. Therefore, when the laser welding machine 44 welds the component plates, the end of the laser welding machine 44 must move along the concave and convex surfaces of the component plate surface, and ensure that the end of the laser welding machine 44 is perpendicular to the concave and convex surfaces of the component plate surface (the welding is carried out in the order of concave plane, concave inclined plane, convex plane, and convex inclined plane). Concave plane welding: The first variable frequency motor 5 and the first hinge plate 51 cooperate to push the sliding frame 52 to move to the right, so that the teeth 53 on the left side of the inner wall of the sliding frame 52 abut against the gear ring 54, and push the laser welding machine 44 on the transmission gear shaft 45 and the slide plate 4 to move towards the side closer to the concave plane of the component plate. When the sliding frame 52 pushes the laser welding machine 44 to move to the maximum distance, the sliding support arm 2 moves forward on the drive table 1, driving the U-shaped limit slide 3 to move forward, so that the laser welding machine 44 welds the concave plane of the component plate. Concave inclined surface welding: During the process of the sliding support arm 2 driving the laser welding machine 44 to move forward, the first frequency conversion motor 5 and the first hinge plate 51 cooperate to pull the sliding frame 52 to the left to reset, causing the teeth 53 on the left side of the inner wall of the sliding frame 52 to separate from the gear ring 54 (so that the subsequent drive transmission gear shaft 45 can deflect and drive the laser welding machine 44 to be perpendicular to the concave inclined surface of the component plate). At the same time, the second variable frequency motor 6 and the second hinge plate 61 cooperate to drive the sector plate 63 to deflect counterclockwise. (At this time, the arc rack 65 meshes with the transmission gear shaft 45 and will not drive the arc rack 65 to deflect simultaneously.) When the front baffle 66 on the sector plate 63 abuts against the arc rack 65, the laser welding machine 44 will move forward to the front end of the concave plane of the component plate. At this time, the arc rack 65 is squeezed by the front baffle 66 on the sector plate 63, causing the arc rack 65 to drive the transmission gear shaft 45 to rotate clockwise, causing the laser welding machine 44 on it to be perpendicular to the concave inclined plane of the component plate. Then, the first variable frequency motor 5 and the first hinge plate 51 pull the sliding frame 52 to the left to reset and abut against the rotated gear ring 54 through the teeth 53 on the right side of its inner wall, locking the laser welding machine 44 in the deflection state (to prevent the damping reset spring telescopic plate 43 in the extended state from pulling the laser welding machine 44 to reset). When the sliding frame 52 moves to the left, the transmission gear shaft 45 is locked and the laser welding machine 44 is pulled to the left. The sliding support arm 2 moves forward and slides on the drive table 1, so that the laser welding machine 44 moves on the concave inclined surface of the component plate while perpendicular to the concave inclined surface of the component plate, and welds the concave inclined surface of the component plate. Convex plane welding: When the sliding frame 52 pulls the transmission gear shaft 45 to the left to the maximum distance, the sliding frame 52 moves to the right under the cooperation of the first variable frequency motor 5 and the first hinge plate 51. At this time, the right side tooth 53 of the inner wall of the sliding frame 52 separates from the transmission gear shaft 45, releasing the locking state of the right side tooth 53 of the inner wall of the sliding frame 52 to the transmission gear shaft 45. At this time, the extension plate 43 of the damping reset spring retracts and pulls the laser welding machine 44 to reset. After the laser welding machine 44 is reset, it is perpendicular to the convex plane of the component plate and moves forward with the sliding support arm 2 to drive the laser welding machine 44 to weld the convex plane of the component plate. Convex inclined plane welding: When the laser welding machine 44 moves to the front end of the convex plane of the component plate, the second variable frequency motor 6 and the second hinge plate 61 cooperate to drive the fan-shaped plate 63 to deflect clockwise. At this time, the rear baffle 66 abuts against the arc rack 65, which in turn drives the transmission gear shaft 45 to rotate counterclockwise through the arc rack 65, causing the laser welding machine 44 on it to be perpendicular to the convex inclined plane of the component plate. At this time, the first variable frequency motor 5 and the first hinge plate 51 push the sliding frame 52 to the right, and the teeth 53 on the left side of its inner wall abut against the rotated gear ring 54 to lock the laser welding machine 44 in the deflection state. When the sliding frame 52 moves to the right, it locks the transmission gear shaft 45 and pushes the laser welding machine 44 to the right. The sliding support arm 2 moves forward and slides on the drive table 1, so that the laser welding machine 44 is perpendicular to the convex inclined surface of the component plate and welds the convex inclined surface of the component plate.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A container body laser welding device, comprising a drive table (1), a sliding support arm (2) that can slide is installed on the left side of the drive table (1), a drive seat (7) is longitudinally slidably arranged on the sliding support arm (2), a U-shaped limiting slide (3) is installed on the drive seat (7), and a sliding plate (4) for supporting the welding actuator is slidably connected on the U-shaped limiting slide (3). Its features are: A deflection shaft seat (41) is fixedly connected to the side of the sliding support arm (2) of the slide plate (4). A rotating shaft (42) is rotatably connected in the shaft hole of the deflection shaft seat (41). A damping reset spring telescopic plate (43) with controllable reset rate is rotatably sleeved on the top side of the rotating shaft (42). A laser welding machine (44) is hinged to the end of the damping reset spring telescopic plate (43) away from the rotating shaft (42). A transmission gear shaft (45) is fixedly connected to the bottom of the laser welding machine (44). The transmission gear shaft (45) is damped and rotatably connected to the top surface of the slide plate (4) to realize the controllable deflection angle of the laser welding machine (44). The bottom surface of the U-shaped limiting slide (3) is equipped with a first drive variable frequency motor (5). The rotation shaft of the first drive variable frequency motor (5) is located inside the U-shaped limiting slide (3), and the upper end of the rotation shaft is fixedly connected to a first hinge plate (51). The end of the first hinge plate (51) away from the first drive variable frequency motor (5) is hinged to a sliding frame (52). The sliding frame (52) has a racetrack-shaped cavity inside. The two semicircular sections of its inner wall are provided with teeth (53) that are compatible with the gear ring (54). The gear ring (54) is provided inside. The gear ring (54) is fixedly sleeved on the transmission gear shaft (45). The transmission gear shaft (45) is locked and moved in a coordinated manner by the left and right movement of the sliding frame (52) and the meshing of the teeth (53) with the gear ring (54). A second drive variable frequency motor (6) is fixedly connected to the front of the top of the slide plate (4). A second hinge plate (61) is fixedly connected to the top of the second drive variable frequency motor (6). A connecting shaft (62) is rotatably connected to the end of the second hinge plate (61) away from the second drive variable frequency motor (6). A fan-shaped plate (63) is rotatably connected to the rotating shaft (42) to form a deflection drive base. An arc-shaped rack (65) is slidably connected to the upper limit of the arc-shaped edge of the fan-shaped plate (63). The arc-shaped rack (65) meshes on the transmission gear shaft (45). Both ends of the arc-shaped edge of the fan-shaped plate (63) are fixedly connected to baffles (66). By reciprocating deflection of the fan-shaped plate (63), the baffles (66) alternately push the arc-shaped rack (65) to realize the forward and reverse rotation of the transmission gear shaft (45) to adapt to the welding angle of the concave and convex surfaces.

2. The container laser welding device according to claim 1, characterized in that: A spring-loaded telescopic buffer plate (510) is hinged between the first hinge plate (51) and the sliding frame (52) to absorb the impact load during the transmission process of the first drive variable frequency motor (5) and ensure that the sliding frame (52) moves smoothly.

3. The container laser welding device according to claim 2, characterized in that: An arc-shaped guide groove (64) is provided on the inner side of the fan-shaped plate (63), and the connecting shaft (62) is located in the arc-shaped guide groove (64). The arc-shaped guide groove (64) limits the deflection trajectory and angle range of the fan-shaped plate (63).

4. The container laser welding device according to claim 3, characterized in that: The sliding frame (52) is equipped with limit plates (55) on both the front and rear sides. The two limit plates (55) are fixed on the front and rear sides of the U-shaped limit slide (3). The slide plate (4) is located between the limit plates (55) and the U-shaped limit slide (3), forming a two-way limit guide structure for the slide plate (4).

5. A container laser welding device according to claim 4, characterized in that: A first hook plate (56) is fixedly connected to the right side of the sliding frame (52), and the first hook plate (56) slides in the first push groove (57) on the right side of the slide plate (4); a second hook plate (58) is fixedly connected to the left side of the sliding frame (52), and the second hook plate (58) slides in the second push groove (59) on the left side of the slide plate (4).

6. The container laser welding device according to claim 5, characterized in that: The upper and lower ends of the connecting shaft (62) are threaded with locking nuts (67). The two locking nuts (67) abut against the upper and lower end faces of the sector plate (63) to lock the position of the connecting shaft (62) in the arc guide groove (64) to adjust the deflection stroke of the sector plate (63).

7. A container laser welding device according to claim 6, characterized in that: The drive seat (7) is composed of a slider (71) and a C-shaped plate (72) hinged together. The slider (71) slides on the sliding support arm (2). The C-shaped plate (72) is fixedly connected to the U-shaped limiting slide (3). A locking rod (73) is provided between the C-shaped plate (72) and the slider (71). The angle adjustment and locking of the U-shaped limiting slide (3) are realized through the hinge structure and the locking rod (73).

8. A container laser welding device according to claim 7, characterized in that: A drive cylinder is fixedly connected to the drive seat (7). The drive cylinder is fixed on the sliding support arm (2) and is used to drive the drive seat (7) to perform high-precision longitudinal displacement along the sliding support arm (2).

9. A method for inspecting the weld quality of a container body laser welding device, using a container body laser welding device as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. The scanning inspection should follow the sequence of "concave plane → concave inclined plane → convex plane → convex inclined plane". The scanning camera is installed in the laser welding machine (44) position. The end of the scanning camera lens is always perpendicular to the inspection surface and moves along the concave and convex surfaces. S2, concave plane scanning: The first drive frequency conversion motor (5) and the first hinge plate (51) push the sliding frame (52) to the right. After the teeth (53) on the left side of its inner wall abut against the tooth ring (54), the scanning camera and the slide plate (4) are driven to approach the concave plane. After moving to the maximum distance, the sliding arm (2) moves forward along the drive table (1) and drives the scanning camera to complete the concave plane scanning. S3, Concave Inclined Surface Scanning: During the forward movement of the sliding arm (2), the first drive variable frequency motor (5) pulls the sliding frame (52) to move to the left and reset, and the left tooth (53) separates from the tooth ring (54); at the same time, the second drive variable frequency motor (6) drives the fan plate (63) to deflect counterclockwise, and the front baffle (66) squeezes the arc-shaped rack (65), driving the transmission gear shaft (45) to rotate clockwise, so that the scanning camera is perpendicular to the concave inclined surface; Then the sliding frame (52) moves to the left, and the rotated toothed ring (54) is locked by the right tooth (53). Simultaneously, the scanning camera is pulled to the left, and the sliding arm (2) moves forward to complete the scanning of the concave slope. S4, Convex plane scanning: The sliding frame (52) moves to the left to the maximum distance and then moves to the right, and the right tooth (53) separates from the tooth ring (54); the damping reset spring telescopic plate (43) retracts to drive the scanning camera to reset, making it perpendicular to the convex plane, and then the sliding support arm (2) moves forward to complete the convex plane scanning; S5. Convex inclined plane scanning: When the scanning camera moves to the front end of the convex plane, the second drive frequency conversion motor (6) drives the fan plate (63) to deflect clockwise, and the rear baffle (66) pushes the arc rack (65) to drive the transmission gear shaft (45) to rotate counterclockwise, so that the scanning camera is perpendicular to the convex inclined plane; then the sliding frame (52) moves to the right, locks the gear ring (54) through the left tooth (53), and pushes the scanning camera to the right in sync, and cooperates with the sliding support arm (2) to move forward to complete the convex inclined plane scanning.

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