A laser welding device for processing automobile safety parts

Abstract

The utility model discloses a kind of laser welding devices for automobile safety parts processing, including double-station rotary table, the rack that straddles above workbench, the laser welding system of connecting rack, the modular composite cooling system of connecting laser welding system and the control system of built-in welding path planning module and thermal deformation compensation algorithm, the control system is connected double-station rotary table, laser welding system and modular composite cooling system respectively.The double-station rotary table cooperation servo drive motor and angle encoder, realize two workstations fast accurate switching, can synchronously carry out welding and loading and unloading operation, substantially improve production efficiency;V type positioning groove is combined with wear-resistant ceramic coating, positioning pin hole and positioning calibration mechanism, and high-precision positioning of parts is realized by elastic fine adjustment ejector pin, cooperate the automatic calibration and path compensation of visual positioning lens, guarantee welding position accuracy.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, specifically a laser welding device for processing automotive safety parts. Background Technology

[0002] The welding quality of automotive safety components (such as frame connectors and airbag assemblies) directly affects vehicle driving safety, requiring extremely high welding precision, joint strength, and stability. Existing laser welding equipment has several shortcomings in processing such components: In terms of positioning, traditional fixtures have low positioning accuracy, easily leading to welding misalignment due to part clamping deviations, and lack effective fine-tuning and calibration mechanisms; thermal deformation control is insufficient, with drastic temperature changes during welding, and existing equipment often lacks real-time thermal deformation compensation functions, easily generating welding stress and deformation, affecting part dimensional accuracy; production efficiency is limited, with single-station designs resulting in long loading and unloading waiting times, making it difficult to meet the needs of mass production. Furthermore, cooling systems are mostly based on a single cooling method, easily leading to overheating of the laser generator or oxidation of the welding area, and cannot adapt to the focal length adjustment requirements of parts with different thicknesses. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a laser welding device for processing automotive safety parts, which can effectively solve the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A laser welding apparatus for processing automotive safety parts includes a dual-station rotary table, a frame spanning above the table, a laser welding system connected to the frame, a modular composite cooling system connected to the laser welding system, and a control system with a built-in welding path planning module and a thermal deformation compensation algorithm. The control system is connected to the dual-station rotary table, the laser welding system, and the modular composite cooling system.

[0006] The dual-station rotary workbench is provided with a rotary shaft, a first station and a second station. The first station and the second station are provided with pneumatic clamps and temperature sensors. One side of the pneumatic clamp is provided with a V-shaped positioning groove.

[0007] The laser welding system includes a laser generator, an optical fiber transmission unit, and a welding head. The welding head integrates a visual positioning lens, a dynamic focusing lens group, and an infrared temperature measurement probe.

[0008] The modular composite cooling system includes an annular aerosol cooling spray cavity integrated with the welding head and an adjustable angle air cooler located on the side of the worktable. The annular aerosol cooling spray cavity is arranged around the laser generator.

[0009] As a further description of the above technical solution, the annular aerosol cooling spray cavity includes concentrically arranged double-ring pipes, the double-ring pipes being an inner ring pipe through which inert gas is introduced and an outer ring pipe through which atomizing coolant is introduced.

[0010] As a further description of the above technical solution, it also includes a positioning calibration mechanism, which includes a reference positioning block disposed on the edge of the worktable and an elastic fine-tuning pin connected to the reference positioning block, wherein the reference positioning block cooperates with a V-shaped positioning groove.

[0011] As a further description of the above technical solution, the frame is equipped with a three-dimensional linear drive module for adjusting the focal length of the dynamic focusing lens group, and the three-dimensional linear drive module is connected to the visual positioning lens and the control system respectively.

[0012] As a further description of the above technical solution, the three-dimensional linear drive module includes an X-axis drive component, a Y-axis drive component, and a Z-axis drive component.

[0013] As a further description of the above technical solution, the inner wall of the V-shaped positioning groove is provided with a wear-resistant ceramic coating, and the bottom of the V-shaped positioning groove is provided with a positioning pin hole that cooperates with the positioning hole of the automotive safety component.

[0014] As a further description of the above technical solution, the rotating shaft is connected to a servo drive motor and an angle encoder. The servo drive motor is used to drive the rotating shaft to switch the positions of the first station and the second station. The angle encoder is electrically connected to the control system.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model discloses a laser welding device for processing automotive safety parts, which has at least one of the following beneficial effects during use:

[0017] The dual-station rotary table, combined with a servo drive motor and angle encoder, enables rapid and precise switching between the two stations, allowing for simultaneous welding and loading / unloading operations, significantly improving production efficiency. A V-shaped positioning groove, along with a wear-resistant ceramic coating, positioning pin holes, and a positioning calibration mechanism, achieves high-precision part positioning through a flexible micro-adjustment pin. Combined with automatic calibration and path compensation from a vision positioning lens, it ensures accurate welding positions. A three-dimensional linear drive module and a dynamic focusing lens group flexibly adjust the focal length to adapt to different part requirements. A thermal deformation compensation algorithm dynamically corrects the trajectory based on real-time temperature data, effectively reducing the impact of thermal deformation and improving welding quality. A modular composite cooling system, through dual-ring pipe mist cooling and adjustable-angle air cooling, achieves comprehensive cooling and inert gas protection in the welding area, preventing equipment overheating and part oxidation, ensuring stable system operation, and enhancing the overall versatility and reliability of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a laser welding device for processing automotive safety parts according to the present invention.

[0019] Figure 2 This is a schematic diagram of the first side structure of a laser welding device for processing automotive safety parts according to the present invention;

[0020] Figure 3 This is a schematic diagram of the second side structure of a laser welding device for processing automotive safety parts according to the present invention;

[0021] Figure 4 This is a schematic diagram of the laser welding system structure of a laser welding device for processing automotive safety parts according to this utility model.

[0022] Numbering on the map:

[0023] 1. Dual-station rotary table; 2. Adjustable angle air cooler; 3. Annular aerosol cooling spray chamber; 4. Frame; 5. Three-dimensional linear drive module; 6. Control system; 7. Laser welding system; 8. Pneumatic fixture; 9. Z-axis drive component; 10. Y-axis drive component; 11. X-axis drive component; 12. First station; 13. Second station; 14. V-shaped positioning groove; 15. Double-ring pipe; 16. Vision positioning lens; 17. Dynamic focusing lens group; 18. Infrared temperature measurement probe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-4 As shown, this utility model provides a laser welding device for processing automotive safety parts, including a dual-station rotary table 1, a frame 4 spanning above the table, a laser welding system 7 connected to the frame 4, a modular composite cooling system connected to the laser welding system 7, and a control system 6 with a built-in welding path planning module and a thermal deformation compensation algorithm. The control system 6 is connected to the dual-station rotary table 1, the laser welding system 7, and the modular composite cooling system.

[0026] First, the parts are positioned and secured. The automotive safety component is placed on either the first station 12 or the second station 13 of the dual-station rotary table 1. The pneumatic clamp 8 is activated, using the V-shaped positioning groove to clamp and secure the part. The wear-resistant ceramic coating on the inner wall of the V-shaped positioning groove reduces wear during part positioning. The positioning pin hole at the bottom of the groove mates with the positioning hole of the automotive safety component, further ensuring the accuracy of part positioning. Simultaneously, the reference positioning block of the positioning calibration mechanism mates with the V-shaped positioning groove, and the elastic fine-tuning pin allows for subtle adjustments to the part's position, improving positioning accuracy.

[0027] The dual-station rotary table 1 is provided with a rotary shaft, a first station 12 and a second station 13. The first station 12 and the second station 13 are provided with pneumatic clamps 8 and temperature sensors. A V-shaped positioning groove 14 is provided on one side of the pneumatic clamps 8.

[0028] Next, pre-welding preparations are carried out. The vision positioning lens 16 works in conjunction with the welding path planning module to automatically calibrate the feature points of the part before welding, generate a local compensation path, and update it to the thermal deformation compensation algorithm. The control system 6 controls the three-dimensional linear drive module 5 (composed of X-axis drive, Y-axis drive and Z-axis drive) on the frame 4 according to the preset path of the welding path planning module and the generated local compensation path, to adjust the position of the vision positioning lens 16 and the welding head, as well as the focal length of the dynamic focusing lens group 17, to ensure that the welding head is aligned with the welding start position and the focal length is appropriate.

[0029] The laser welding system 7 includes a laser generator, an optical fiber transmission unit, and a welding head. The welding head integrates a vision positioning lens 16, a dynamic focusing lens group 17, and an infrared temperature probe 18. Welding then begins. The control system 6 controls the laser generator to produce laser light, which is transmitted to the welding head via the optical fiber transmission unit. The welding head focuses the laser light onto the welding area of ​​the part for welding. During the welding process, the rotation axis of the dual-station rotary table 1, driven by a servo drive motor, can switch between the first station 12 and the second station 13 as needed, enabling continuous operation. An angle encoder monitors the rotation angle in real time and feeds the data back to the control system 6, ensuring the accuracy of station switching.

[0030] The modular composite cooling system includes an annular aerosol cooling spray cavity 3 integrated with the welding head and an adjustable angle air cooler 2 disposed on the side of the worktable. The annular aerosol cooling spray cavity 3 is arranged around the laser generator.

[0031] In addition, the cooling system operates throughout the entire process. The annular aerosol cooling spray chamber 3 in the modular composite cooling system surrounds the laser generator. Within its concentrically arranged double-ring pipes 15, the inner ring pipe carries inert gas to protect the welding area and prevent oxidation of the parts during welding; the outer ring pipe carries atomized coolant to cool the laser generator. An adjustable-angle air cooler 2, located on the side of the worktable, can be adjusted to cool the worktable and parts as needed, ensuring that the device and parts remain within a suitable temperature range during welding.

[0032] Furthermore, the annular aerosol cooling spray cavity 3 includes concentrically arranged double-ring pipes 15, which are an inner ring pipe for introducing inert gas and an outer ring pipe for introducing atomized coolant. The modular composite cooling system combines the annular aerosol cooling spray cavity 3 with an adjustable-angle air cooler 2 to comprehensively cool the laser generator, worktable, and welding area, preventing excessive temperature from affecting the device's performance and lifespan, and ensuring stable system operation.

[0033] Furthermore, it also includes a positioning calibration mechanism, which includes a reference positioning block disposed on the edge of the worktable and an elastic fine-tuning pin connected to the reference positioning block. The reference positioning block cooperates with the V-shaped positioning groove 14.

[0034] The design of the dual-station rotary table 1 allows for the loading and unloading of parts at one station while welding is being performed at the other. The servo drive motor enables fast and precise station switching, significantly reducing auxiliary time and improving overall processing efficiency.

[0035] The V-shaped positioning groove, in conjunction with the pneumatic clamp 8 and the positioning pin holes at the bottom of the groove and the wear-resistant ceramic coating on the inner wall, not only securely clamps the parts but also ensures the consistency and accuracy of part positioning. The reference positioning block and the elastic fine-tuning pin of the positioning calibration mechanism further fine-tune the position of the parts, ensuring that the parts remain stable during welding. The visual positioning lens 16, linked with the welding path planning module, automatically calibrates the feature points of the parts and generates local compensation paths, providing a foundation for precise welding.

[0036] Furthermore, the frame 4 is equipped with a three-dimensional linear drive module 5 for adjusting the focal length of the dynamic focusing lens group 17, and the three-dimensional linear drive module 5 is connected to the visual positioning lens 16 and the control system 6 respectively.

[0037] The three-dimensional linear drive module 5 includes an X-axis drive component 11, a Y-axis drive component 10, and a Z-axis drive component 9.

[0038] The dynamic focusing lens group 17 in the laser welding system 7 can flexibly adjust the focal length under the drive of the three-dimensional linear drive module 5 to ensure precise laser focusing; the thermal deformation compensation algorithm dynamically corrects the motion trajectory based on the real-time data of the temperature sensor and the infrared temperature probe 18, effectively reducing the impact of thermal deformation of parts caused by temperature changes during the welding process on the welding quality, and improving the strength and sealing of the welded joint.

[0039] The three-dimensional linear drive module 5 enables the welding head to move flexibly in the X, Y, and Z axes, while the dynamic focusing lens group 17 can adapt to the welding requirements of automotive safety parts of different thicknesses and types. This makes the device highly versatile and adaptable, and can meet the processing requirements of various automotive safety parts.

[0040] Furthermore, the inner wall of the V-shaped positioning groove 14 is provided with a wear-resistant ceramic coating, and the bottom of the V-shaped positioning groove 14 is provided with a positioning pin hole that cooperates with the positioning hole of the automotive safety component.

[0041] Furthermore, the rotating shaft is connected to a servo drive motor and an angle encoder. The servo drive motor is used to drive the rotating shaft to switch the positions of the first station 12 and the second station 13. The angle encoder is electrically connected to the control system 6.

[0042] Its trajectory is dynamically corrected by the thermal deformation compensation algorithm of the central control system 6, and the correction parameters are generated based on the real-time data of the temperature sensor and the infrared temperature probe 18.

[0043] The visual positioning lens 16 is linked with the welding path planning module to automatically calibrate the feature points of the parts before welding, generate a local compensation path, and update it to the thermal deformation compensation algorithm.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A laser welding apparatus for processing automotive safety components, characterized in that: It includes a dual-station rotary table, a frame spanning above the table, a laser welding system connected to the frame, a modular composite cooling system connected to the laser welding system, and a control system with a built-in welding path planning module and a thermal deformation compensation algorithm. The control system is connected to the dual-station rotary table, the laser welding system, and the modular composite cooling system respectively. The dual-station rotary workbench is provided with a rotary shaft, a first station and a second station. The first station and the second station are provided with pneumatic clamps and temperature sensors. One side of the pneumatic clamp is provided with a V-shaped positioning groove. The laser welding system includes a laser generator, an optical fiber transmission unit, and a welding head. The welding head integrates a visual positioning lens, a dynamic focusing lens group, and an infrared temperature measurement probe. The modular composite cooling system includes an annular aerosol cooling spray cavity integrated with the welding head and an adjustable angle air cooler located on the side of the worktable. The annular aerosol cooling spray cavity is arranged around the laser generator.

2. The laser welding apparatus for processing automotive safety components according to claim 1, characterized in that: The annular aerosol cooling spray chamber includes concentrically arranged double-ring pipes, namely an inner ring pipe for introducing inert gas and an outer ring pipe for introducing atomizing coolant.

3. The laser welding apparatus for processing automotive safety components according to claim 1, characterized in that: It also includes a positioning calibration mechanism, which includes a reference positioning block disposed on the edge of the worktable and an elastic fine-tuning pin connected to the reference positioning block, wherein the reference positioning block cooperates with a V-shaped positioning groove.

4. The laser welding apparatus for processing automotive safety components according to claim 1, characterized in that: The frame is equipped with a three-dimensional linear drive module for adjusting the focal length of the dynamic focusing lens group. The three-dimensional linear drive module is connected to the vision positioning lens and the control system.

5. The laser welding apparatus for processing automotive safety components according to claim 4, characterized in that: The three-dimensional linear drive module includes an X-axis drive component, a Y-axis drive component, and a Z-axis drive component.

6. The laser welding apparatus for processing automotive safety components according to claim 1, characterized in that: The inner wall of the V-shaped positioning groove is coated with a wear-resistant ceramic coating, and the bottom of the V-shaped positioning groove is provided with a positioning pin hole that matches the positioning hole of the automotive safety component.

7. The laser welding apparatus for processing automotive safety components according to claim 1, characterized in that: The rotating shaft is connected to a servo drive motor and an angle encoder. The servo drive motor is used to drive the rotating shaft to switch the positions of the first station and the second station. The angle encoder is electrically connected to the control system.

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