Automatic auxiliary positioning device for laser welding

Abstract

The utility model provides an automatic auxiliary positioning device for laser welding, and relates to the technical field of laser welding. The automatic auxiliary positioning device for laser welding comprises a laser welding device, a laser welding head is arranged at the lower end of the laser welding device, a first track ring groove is connected to the outer end of the laser welding head, a gear ring is slidably connected into the first track ring groove, and a second track ring groove is connected to the outer end of the laser welding head. According to the automatic auxiliary positioning device for laser welding, the height range finder is arranged at the side end of the laser welding head and transmits a range finding value to the control terminal, the control terminal analyzes the range finding value and then adjusts the height of the laser welding head through the first telescopic cylinder so as to achieve the optimal welding distance, and therefore the height is positioned, the welding precision and quality can be improved, and the welding efficiency is improved. And meanwhile, the servo motor drives the gear and the gear ring to act, so that the height range finder can be located at any position around the laser welding head, the laser welding head can adapt to the change of a welding route in real time to accurately adjust the height, and high-precision welding can be performed on a complex path.

Description

Technical Field

[0001] This utility model relates to a laser welding positioning device, specifically an automatic auxiliary positioning device for laser welding, and belongs to the field of laser welding technology. Background Technology

[0002] Laser welding is a new type of welding technology that uses heat conduction to fuse adjacent materials together to form a weld. Laser welding has advantages such as fast welding speed, small heat-affected zone, and high welding quality. Like traditional welding equipment, laser welding requires positioning operations during the welding process.

[0003] While existing laser welding equipment can easily achieve precise positioning in planar positioning, it still has some problems in height positioning. Current height positioning generally involves measuring the height of the welding plate to determine the height of the laser welding head. However, this method cannot accurately measure the travel path of the laser welding head and the height of the weld position. When the welding plate is slightly bent and has an arc, the distance between different weld positions and the laser welding head is different, making it difficult to achieve the optimal distance between the laser welding head and the welding plate. This not only affects the welding accuracy but also reduces the welding quality.

[0004] To address these issues, we have developed an automatic auxiliary positioning device for laser welding. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides an automatic auxiliary positioning device for laser welding, the specific technical solution of which is as follows:

[0006] An automatic auxiliary positioning device for laser welding includes a laser welder, a laser welding head at the lower end of the laser welder, a first track groove connected to the outer end of the laser welding head, a toothed ring slidably connected in the first track groove, a second track groove connected to the outer end of the laser welding head, a connecting ring slidably connected in the second track groove, a connecting plate connecting the toothed ring and the connecting ring, a fixing ring connected to the side end of the connecting ring, a height measuring device disposed in the fixing ring, a servo motor disposed at the outer end of the laser welding head, a gear connected to the drive end of the servo motor, and the gear meshing with the toothed ring.

[0007] Preferably, a protective cover is connected to the lower end of the laser welder, the height rangefinder and the servo motor are both located inside the protective cover, and a protective plate is connected to the outer end of the laser welding head.

[0008] Preferably, a groove is provided between the protective cover and the protective plate, and the lower end of the laser welding head is located in the groove.

[0009] Preferably, the laser welder has a telescopic cylinder connected to its rear end, a movable block connected to its rear end, a threaded rod internally connected to the movable block, and movable frames provided at both ends of the threaded rod.

[0010] Preferably, a drive motor is provided on the side of the movable frame, the drive end of which is connected to a threaded rod, a fixed frame is connected between the movable frames, and the movable block is slidably connected within the fixed frame.

[0011] Preferably, a smart recognizer is provided on the side of the fixed frame, the smart recognizer includes an image acquisition module and an image processing unit, and a lateral rangefinder is provided on the side of the moving block.

[0012] Preferably, the lower end of the mobile frame is provided with a roller, the side end of the roller is provided with a driver, the lower end of the mobile frame is provided with a track frame, and the side end of the mobile frame is provided with a longitudinal rangefinder.

[0013] Preferably, a processing support platform is connected to the lower end of the track frame, a control terminal is provided on the side of the processing support platform, a support tooth plate is connected inside the processing support platform, a second telescopic cylinder is provided inside the processing support platform, an electromagnet is connected to the drive end of the second telescopic cylinder, and the electromagnet is located between the support tooth plates.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This automatic auxiliary positioning device for laser welding uses a height rangefinder installed on the side of the laser welding head. This rangefinder can measure the height of the laser welding head in advance along its path. The measured value is transmitted to the control terminal, which analyzes the data and adjusts the height of the laser welding head using a telescopic cylinder to ensure the optimal distance between the laser welding head and the welding plate. This precise height adjustment and positioning improves welding accuracy and quality. Simultaneously, a servo motor drives a gear to rotate. The gear's rotation, in conjunction with a gear ring, allows the height rangefinder to be positioned anywhere around the laser welding head. This ensures that the height rangefinder can measure the distance in advance regardless of changes in the laser welding head's path, allowing the laser welding head to adapt to changes in the welding path and precisely adjust its height, maintaining high-precision welding even in complex welding paths.

[0016] 2. This automatic auxiliary positioning device for laser welding is equipped with a moving block and a threaded rod. The rotation of the threaded rod drives the moving block to move, and a lateral rangefinder can detect the position of the moving block during this process. A moving frame is also provided, which can move within a track frame. During this process, a longitudinal rangefinder can detect the position of the moving frame. With the cooperation of the lateral and longitudinal rangefinders, the position of the laser welding head on the processing support table can be determined. This allows for real-time monitoring of the actual position of the laser welding head, enabling the control terminal to make adjustments based on feedback information and ensuring the accuracy of the laser welding head positioning. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the side end structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the threaded rod structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the movable block structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the lower end structure of the laser welding head of this utility model;

[0022] Figure 6 This is a schematic diagram of the height rangefinder structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the laser welding head structure of this utility model;

[0024] Figure 8 This is a schematic diagram of the toothed ring structure of this utility model.

[0025] Figure Descriptions: 1. Laser welder; 2. Laser welding head; 3. First track annular groove; 4. Gear ring; 5. Second track annular groove; 6. Connecting ring; 7. Connecting plate; 8. Fixing ring; 9. Height rangefinder; 10. Servo motor; 11. Gear; 12. Protective cover; 13. Protective plate; 14. Slide groove; 15. No. 1 telescopic cylinder; 16. Moving block; 17. Threaded rod; 18. Moving frame; 19. Fixing frame; 20. Intelligent recognizer; 21. Lateral rangefinder; 22. Track frame; 23. Longitudinal rangefinder; 24. Processing support table; 25. Control terminal; 26. Support gear plate; 27. No. 2 telescopic cylinder; 28. Electromagnet. Detailed Implementation

[0026] The present invention will now be further described with reference to the accompanying drawings.

[0027] Please see Figure 1— Figure 8 The system includes a laser welder 1, with a laser welding head 2 at its lower end. A telescopic cylinder 15 is connected to the rear end of the laser welder 1, which is used to adjust the height of the laser welder 1, thereby adjusting the distance between the laser welding head 2 and the welding plate. A moving block 16 is connected to the rear end of the telescopic cylinder 15, with a threaded rod 17 internally threaded onto the moving block 16. Moving frames 18 are provided at both ends of the threaded rod 17, and a drive motor is provided on the side of the moving frame 18. The drive end of the drive motor is connected to the threaded rod 17, which can drive the threaded rod 17 to rotate. A fixed frame 19 is connected between the moving frames 18, and the moving block 16 is slidably connected within the fixed frame 19, thus preventing the moving block 16 from rotating within the fixed frame 19. The drive motor on the side of the threaded rod 17 can drive the threaded rod 17 to rotate. The rotation of the threaded rod 17 interacts with the moving block 16, and under the constraint of the fixed frame 19, the moving block 16 can move within the fixed frame 19, thereby driving the laser welder 1 to move.

[0028] A lateral rangefinder 21 is provided on the side of the moving block 16. The lateral rangefinder 21 is used to monitor the position of the moving block 16 within the fixed frame 19, thereby determining the position of the laser welder 1. A roller is provided at the lower end of the moving frame 18, and a driver is provided on the side of the roller. A track frame 22 is provided at the lower end of the moving frame 18, and the moving frame 18 can move on the track frame 22. A longitudinal rangefinder 23 is provided on the side of the moving frame 18. The longitudinal rangefinder 23 is used to determine the position of the moving frame 18 within the track frame 22, thereby determining the position of the laser welder 1.

[0029] The lower end of the track frame 22 is connected to a processing support table 24. A support toothed plate 26 is connected inside the processing support table 24. The welding plate is placed on the support toothed plate 26. A second telescopic cylinder 27 is installed inside the processing support table 24. An electromagnet 28 is connected to the drive end of the second telescopic cylinder 27. The electromagnet 28 can generate magnetic force when energized. The electromagnet 28 is located between the support toothed plates 26. A control terminal 25 is installed on the side of the processing support table 24. The control terminal 25 is used to control the operation of the device.

[0030] A smart identifier 20 is provided on the side of the fixed frame 19. The smart identifier 20 is a device that can automatically identify the weld seam of the workpiece. The smart identifier 20 includes an image acquisition module and an image processing unit. The image acquisition module uses a high-resolution industrial camera to acquire clear images of the surface of the welding plate. The image processing unit is connected to the image acquisition module. After receiving the acquired image, it uses advanced image recognition algorithms to accurately identify the outline, feature points and other information of the area to be welded on the welding plate.

[0031] The outer end of the laser welding head 2 is connected to a first track annular groove 3, and a toothed ring 4 is slidably connected inside the first track annular groove 3. The outer end of the laser welding head 2 is connected to a second track annular groove 5, and a connecting ring 6 is slidably connected inside the second track annular groove 5. A connecting plate 7 is connected between the toothed ring 4 and the connecting ring 6. The connecting plate 7 is used to connect the toothed ring 4 and the connecting ring 6 together, so that when the toothed ring 4 rotates, it drives the connecting ring 6 to rotate. A fixing ring 8 is connected to the side end of the connecting ring 6. A height measuring device 9 is installed inside the fixing ring 8. The fixing ring 8 is used to fix the height measuring device 9. A servo motor 10 is installed at the outer end of the laser welding head 2. A gear 11 is connected to the drive end of the servo motor 10. The gear 11 meshes with the toothed ring 4.

[0032] The lower end of the laser welder 1 is connected to a protective cover 12. The height rangefinder 9 and the servo motor 10 are both located inside the protective cover 12. The protective cover 12 is used to protect the internal equipment. The outer end of the laser welding head 2 is connected to a protective plate 13. A groove 14 is opened between the protective cover 12 and the protective plate 13. The lower end of the laser welding head 2 is located in the groove 14.

[0033] In this application, telescopic cylinder 15 and telescopic cylinder 27 are common electrical devices in the prior art. This application will not elaborate on their models or internal structures, and they can also be replaced by other power sources.

[0034] When using this device: place the welding plate on the support tooth plate 26 of the processing support table 24, then activate all the No. 2 telescopic cylinders 27 to make the electromagnets 28 fit against the lower end of the welding plate. Then, the moving frame 18 drives the fixed frame 19 to move, so that the intelligent recognizer 20 performs image analysis on the entire welding plate. The analyzed image is transmitted to the control terminal 25, and then the operator selects and determines the weld position. The control terminal 25 moves the No. 2 telescopic cylinder 27 at the lower end of the weld down to energize the electromagnets 28 at the upper end of the other No. 2 telescopic cylinders 27, thereby fixing the welding plate.

[0035] During welding, the moving frame 18 and the moving block 16 drive the laser welder 1 to move in a plane. During this time, the lateral rangefinder 21 and the longitudinal rangefinder 23 determine the position of the laser welding head 2 on the processing support table 24 and monitor the actual position of the laser welding head 2 in real time. The lateral rangefinder 21 and the longitudinal rangefinder 23 transmit data to the control terminal 25. The control terminal 25 adjusts the laser welder 1 in real time based on the feedback information to ensure the accuracy of the positioning of the laser welding head 2. The control terminal 25 drives the gear 11 to rotate through the servo motor 10. The rotation of the gear 11 drives the gear ring 4 to rotate, thereby enabling the height rangefinder to rotate. Moving the laser welding head 2 at its outer end allows the height measuring device 9 to measure the distance in advance along the path of the laser welding head 2. The measured distance is transmitted to the control terminal 25. After analysis, the control terminal 25 calculates the distance between the welding plate and the laser welding head 2 when the laser welding head 2 is at the measuring point and compares it with the optimal welding distance. If the distance is large, the height of the laser welding head 2 is lowered by the first telescopic cylinder 15 when the laser welding head 2 moves to the measuring point. If the distance is small, the laser welding head 2 is raised, so that the distance between the laser welding head 2 and the welding plate is always at the optimal distance.

[0036] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. An automatic auxiliary positioning device for laser welding, comprising a laser welder (1), characterized in that: The laser welding machine (1) is provided with a laser welding head (2) at its lower end. The outer end of the laser welding head (2) is connected to a first track ring groove (3). A toothed ring (4) is slidably connected in the first track ring groove (3). The outer end of the laser welding head (2) is connected to a second track ring groove (5). A connecting ring (6) is slidably connected in the second track ring groove (5). A connecting plate (7) is connected between the toothed ring (4) and the connecting ring (6). A fixing ring (8) is connected to the side end of the connecting ring (6). A height measuring device (9) is provided in the fixing ring (8). A servo motor (10) is provided at the outer end of the laser welding head (2). A gear (11) is connected to the drive end of the servo motor (10). The gear (11) meshes with the toothed ring (4).

2. The automatic auxiliary positioning device for laser welding according to claim 1, characterized in that: The lower end of the laser welder (1) is connected to a protective cover (12), the height rangefinder (9) and the servo motor (10) are both located inside the protective cover (12), and the outer end of the laser welding head (2) is connected to a protective plate (13).

3. The automatic auxiliary positioning device for laser welding according to claim 2, characterized in that: A groove (14) is provided between the protective cover (12) and the protective plate (13), and the lower end of the laser welding head (2) is located in the groove (14).

4. The automatic auxiliary positioning device for laser welding according to claim 1, characterized in that: The laser welder (1) has a telescopic cylinder (15) connected to its rear end. The telescopic cylinder (15) has a moving block (16) connected to its rear end. The moving block (16) has a threaded rod (17) connected to its internal thread. The threaded rod (17) has a moving frame (18) at both ends.

5. The automatic auxiliary positioning device for laser welding according to claim 4, characterized in that: A drive motor is provided on the side of the movable frame (18), and the drive end of the drive motor is connected to the threaded rod (17). A fixed frame (19) is connected between the movable frames (18), and the movable block (16) is slidably connected in the fixed frame (19).

6. The automatic auxiliary positioning device for laser welding according to claim 5, characterized in that: The fixed frame (19) is provided with a smart recognizer (20) on its side. The smart recognizer (20) includes an image acquisition module and an image processing unit. The moving block (16) is provided with a horizontal rangefinder (21) on its side.

7. The automatic auxiliary positioning device for laser welding according to claim 4, characterized in that: The lower end of the mobile frame (18) is provided with a roller, and the side end of the roller is provided with a driver. The lower end of the mobile frame (18) is provided with a track frame (22), and the side end of the mobile frame (18) is provided with a longitudinal rangefinder (23).

8. The automatic auxiliary positioning device for laser welding according to claim 7, characterized in that: The lower end of the track frame (22) is connected to a processing support platform (24). A control terminal (25) is provided on the side of the processing support platform (24). A support tooth plate (26) is connected inside the processing support platform (24). A second telescopic cylinder (27) is provided inside the processing support platform (24). An electromagnet (28) is connected to the driving end of the second telescopic cylinder (27). The electromagnet (28) is located between the support tooth plates (26).

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