A welding tool for maintaining an automobile front anti-collision beam

Abstract

The application discloses a kind of welding tool for automobile front anti-collision beam maintenance, it is related to anti-collision beam maintenance welding technical field, including welding machine body, and fixedly installed in the laser welding assembly of welding machine body inside top surface middle part, and the lower end of laser welding assembly is connected laser welding contact head by mechanical arm;The inside below of welding machine body is provided with adaptive mechanism, and adaptive mechanism contains adaptive sleeve;Wherein, adaptive sleeve is distributed as the "C" shape structure of opposite direction, opening inward;The front of welding machine body is provided with smoke removal mechanism, and smoke removal mechanism contains smoke removal baffle.The welding tool for automobile front anti-collision beam maintenance, by the adaptive sliding plate of welding machine body, the front anti-collision beam body is loaded, and when moving, by the adaptive sleeve of inner end opening, positioning is realized and the adaptation of different lengths is realized, while linkage smoke removal baffle is distributed correspondingly, ensure clean environment, to improve the operation accuracy and maintenance efficiency of laser welding contact head.

Description

Technical Field

[0001] This invention relates to the field of anti-collision beam maintenance welding technology, specifically a welding fixture for maintaining a car front anti-collision beam. Background Technology

[0002] A front bumper beam is a critical safety structure at the front of a vehicle used to absorb and disperse collision energy. It involves inspection, repair, or replacement to ensure effective protection of the passenger compartment in an accident. Laser welding during maintenance refers to the use of high-precision laser technology to achieve high-strength connections between metal components during the repair or replacement of the bumper beam. As a core component of the vehicle's passive safety, the front bumper beam is typically made of ultra-high-strength steel, connected between the vehicle's longitudinal beams, and equipped with an energy-absorbing box to handle low-speed collisions. Routine maintenance requires checking for deformation, cracks, or loose bolts. If damaged in an accident, it's necessary to assess whether it can be repaired through correction or must be replaced. In high-end repairs or original equipment manufacturing (OEM) processes, laser welding is used to connect the bumper beam to the vehicle body.

[0003] Application CN107639370A discloses a fixture for welding automotive anti-collision beams. The fixture directly places the automotive anti-collision beam on a first positioning device and a second positioning device for fixation and positioning, and directly places the connecting beam on a third positioning device for fixation and positioning. This is simple, convenient, and quick, greatly saving time and thus significantly improving work efficiency. The fixture connects the L-shaped positioning plate to the horizontal plate, and the third positioning device is fixedly connected to one end of the L-shaped positioning plate, forming an opening that allows the welding gun to fully weld the connecting beam onto the automotive anti-collision beam.

[0004] Application CN106736156B discloses a welding fixture for a front bumper beam assembly of an automobile. Under the control of the operating table, telescopic cylinders I, II and III are used to quickly clamp and fix the workpiece, which has good clamping stability, improves welding quality, and ensures high dimensional consistency of the workpiece after welding. After welding, the workpiece can be ejected by the energy-absorbing box positioning and ejection mechanism, which makes it convenient and quick to remove the workpiece and improves work efficiency.

[0005] However, the laser welding mechanism for automotive front bumper beams disclosed above still has the following problems in actual processing: the front bumper beam is positioned by symmetrically distributed positioning fixtures, but conventional front bumper beams have an inclined end structure, and the corresponding positioning fixtures have angular deviations during positioning, which leads to the deviation of the force angle of the front bumper beam. At the same time, such positioning fixtures act directly on the surface of the front bumper beam, which causes obstruction during the laser welding process.

[0006] Therefore, we propose a welding fixture for the maintenance of automotive front bumper beams to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a welding fixture for the maintenance of automotive front bumper beams. This invention addresses the problem that existing positioning fixtures are used to position the front bumper beams using symmetrically distributed positioning fixtures. However, conventional front bumper beams have an inclined end structure, and the corresponding positioning fixtures have angular deviations during positioning, which leads to a shift in the force angle of the front bumper beam. In addition, such positioning fixtures act directly on the surface of the front bumper beam, thus causing obstruction during laser welding.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a welding fixture for maintaining a front bumper beam of an automobile, comprising a welding machine body and a laser welding assembly fixedly installed in the middle of the top surface inside the welding machine body, wherein the lower end of the laser welding assembly is connected to a laser welding contact head by a robotic arm for welding the front bumper beam body inside the welding machine body. An adapter mechanism is provided inside the lower part of the welding machine body, and the adapter mechanism includes an adapter fitting, which is fitted onto the connecting plates on the left and right sides of the rear end of the front anti-collision beam body. Among them, the adapters are arranged in a "C" shape with opposite directions and inward openings, and the rear end of the adapters is connected to the top of the adapter carriage by an elastic slide rod. The welding machine body is provided with a fume removal mechanism on the front side, and the fume removal mechanism includes a fume removal baffle. The fume removal baffle is located at the front end of the front anti-collision beam body to absorb the fumes during laser welding operations.

[0009] Preferably, the adapter mechanism includes a material-carrying platform, which is fixedly installed inside the lower part of the welding machine body. An adapter slide plate is slidably installed on the top surface of the material-carrying platform, and slag-blocking arc plates are fixedly installed on both the left and right sides of the front of the adapter slide plate. The adapter slide plate is used to support the front anti-collision beam body.

[0010] Preferably, the adapter mechanism includes adapter grooves formed on the left and right sides of the rear of the adapter slide, and the adapter grooves are slidably connected to the lower end of the adapter slide frame. A two-way lead screw is rotatably installed inside the lower part of the adapter slide via a bearing, and the two-way lead screw is threadedly connected to the lower end of the adapter slide frame inside the adapter slide.

[0011] Preferably, the adapter mechanism includes a base support column, which is fixedly installed on the left and right sides of the top surface of the base support plate, and the base support plate is fixedly installed at the center position in front of the top surface of the adapter slide plate. The upper end of the base support column is attached to the middle of the bottom surface of the front anti-collision beam body to support the weight of the front anti-collision beam body and improve stability.

[0012] Preferably, the adapter mechanism includes a transmission gear, which is fixedly installed on the left and right ends of the bidirectional lead screw. A transmission gear block is meshed with the lower part of the transmission gear, and the transmission gear block is fixedly installed at equal intervals on the left and right sides of the top surface of the loading platform. The adapter slide moves backward on the top surface of the loading platform, driving the adapter fixture at the top of the adapter slide to be sleeved on the connecting plate at the rear end of the front anti-collision beam body.

[0013] Preferably, the adapter mechanism includes an adapter slide whose rear end is fixedly connected to the front telescopic part of the hydraulic cylinder, and the hydraulic cylinder is fixedly installed at the center position behind the top surface of the loading platform. The adapter slide drives the front anti-collision beam body on the top surface to move to the working position at the center position inside the welding machine body, so as to realize the laser welding operation by corresponding to the laser welding component and laser welding contact head on the upper part of the welding machine body.

[0014] Preferably, the smoke removal mechanism includes a positioning crossbeam, which is fixedly installed on the front upper part of the welding machine body. The interior of the positioning crossbeam is rotatably connected to the upper end of the smoke removal baffle via a torsion spring. In the initial state, the smoke removal baffle is distributed horizontally outward on the front exterior of the welding machine body.

[0015] Preferably, the smoke removal mechanism includes a smoke filter unit, which is fixedly installed on the side of the smoke removal baffle away from the welding machine body. Adsorption nozzles are fixedly installed at equal intervals on the surface of the smoke removal baffle close to the welding machine body, and the adsorption nozzles are connected to the smoke filter unit on the front of the smoke removal baffle.

[0016] Preferably, the smoke removal mechanism includes a traction steel cable, with the front end of the traction steel cable fixedly connected to the left and right sides above the back of the smoke removal baffle, the middle part of the traction steel cable passing through the left and right sides inside the welding machine body, and the rear end of the traction steel cable fixedly connected to the left and right sides of the top surface of the adapter slide plate. This is used to drive the smoke removal baffle plate to rotate downward to a vertical state after the adapter slide plate drives the front anti-collision beam body to move into place, thereby achieving smoke removal during welding.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This welding fixture for maintaining the front bumper beam of an automobile loads the front bumper beam body onto the welding machine body via an adapter plate. During movement, the adapter fixture with an open inner end achieves positioning and adapts to different lengths. Simultaneously, the smoke removal baffle is coordinated for corresponding distribution, ensuring a clean environment, thereby improving the working accuracy and maintenance efficiency of the laser welding contact head. The specific details are as follows: 1. Through the combination structure of the adapter fixture and the base support column, the adapter fixture is designed with a C-shaped opening in opposite directions and fits on the outside of the anti-collision beam connecting plate. Together with the base support column to support the weight of the anti-collision beam in the middle, a double locking mechanism is formed, which effectively prevents displacement and misalignment during the welding process and ensures that the anti-collision beam is always in the precise position. At the same time, the adapter slide connected by the elastic sliding rod allows the adapter fixture to slide slightly elastically when under force, absorbing external vibration interference and further enhancing the reliability and stability of positioning.

[0018] 2. The hydraulic cylinder drives the adapter slide plate to move backward, which in turn drives the transmission gear to mesh with the fixed gear block, thereby rotating the double-sided lead screw. The thread action of the double-sided lead screw pushes the adapter slide inward, so that the adapter fixture is automatically fitted onto the outside of the connecting carrier plate. This process can achieve precise positioning of anti-collision beams of different lengths without manual intervention. The elastic slide bar design allows the adapter slide to expand and contract to compensate when the length changes, achieving seamless adaptation of multiple specifications. Automated adjustment not only reduces human operation errors, but also significantly shortens tooling changeover time and improves production line flexibility.

[0019] 3. The smoke removal baffle is linked to the matching slide plate via a traction steel cable. As the slide plate moves backward, it automatically rotates to a vertical position, covering the front of the anti-collision beam. The smoke filter unit is connected to the adsorption nozzle, which extracts smoke and dust in real time to prevent smoke from interfering with the laser welding path. This design avoids the reduced visibility and welding defects caused by smoke and dust accumulation in traditional welding. At the same time, the slag-blocking arc plate blocks spatter in front of the matching slide plate, reducing secondary pollution. Overall, the smoke removal mechanism is automatically activated at the beginning of the welding process to ensure a clean environment, thereby improving the operating accuracy and maintenance efficiency of the laser welding contact head. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the structure of the smoke removal baffle after it has been flipped up according to the present invention; Figure 3 This is a schematic diagram of the installation structure of the front anti-collision beam body of the present invention; Figure 4 This is a schematic diagram of the structure of the device adapted to this invention after it has been moved; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the structure for mounting the fittings and connecting carrier plate of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the skateboard adapted to this invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B; Figure 9This is a schematic diagram of the structure connecting the adaptable fixture and the adaptable carriage of the present invention; Figure 10 This is a schematic diagram of the installation structure of the positioning crossbeam of the present invention.

[0021] In the diagram: 1. Welding machine body; 2. Laser welding assembly; 3. Laser welding contact head; 4. Front anti-collision beam body; 5. Adaptive fixture; 6. Connecting carrier plate; 7. Elastic slide bar; 8. Adaptive slide frame; 9. Smoke removal baffle; 10. Material loading platform; 11. Adaptive slide plate; 12. Slag-blocking arc plate; 13. Two-way lead screw; 14. Bottom support column; 15. Bottom support carrier plate; 16. Transmission gear; 17. Transmission gear block; 18. Hydraulic cylinder; 19. Positioning crossbeam; 20. Smoke filter unit; 21. Adsorption nozzle; 22. Traction cable; 23. Adaptive chute. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-10 The present invention provides the following technical solution: Example 1: In order to solve the problems existing in the laser welding of the front bumper beam during maintenance, this example discloses the following technical solution: a welding fixture for the maintenance of a front bumper beam of an automobile, including a welding machine body 1, an adapter mechanism is provided at the lower part of the welding machine body 1, and the adapter mechanism includes an adapter fixture 5, and the adapter fixture 5 is sleeved on the connecting carrier plates 6 on the left and right sides of the rear end of the front bumper beam body 4; wherein, the adapter fixture 5 is distributed in a "C" shape with opposite directions and inward opening, and the rear end of the adapter fixture 5 is connected to the top of the adapter carriage 8 through an elastic slide rod 7.

[0024] The adapter mechanism includes a material-carrying platform 10, which is fixedly installed inside the lower part of the welding machine body 1. An adapter slide plate 11 is slidably installed on the top surface of the material-carrying platform 10. Slag-blocking arc plates 12 are fixedly installed on the left and right sides of the front of the adapter slide plate 11. The adapter slide plate 11 is used to support the front anti-collision beam body 4. The adapter mechanism includes a bottom support column 14, which is fixedly installed on the left and right sides of the top surface of the bottom support plate 15. The bottom support plate 15 is fixedly installed at the center position in front of the top of the adapter slide plate 11. The upper end of the bottom support column 14 is attached to the middle of the bottom surface of the front anti-collision beam body 4 to support the weight of the front anti-collision beam body 4 and improve stability.

[0025] like Figures 6-7As shown, when maintenance welding work is required on the front bumper beam body 4, the front bumper beam body 4 is first placed on the top of the bottom support column 14 above the adapter slide plate 11. The bottom support column 14 and the bottom support plate 15 position the front bumper beam body 4. At the same time, the front bumper beam body 4 is placed inside the left and right adapter fittings 5 ​​through the connecting plate 6 at the rear end of the outer end energy absorption box. The adapter fittings 5 ​​with the inner open structure position the connecting plate 6 at the outer end of the front bumper beam body 4, thereby avoiding displacement and misalignment during subsequent welding operations.

[0026] Example 2: In order to solve the problems existing in the maintenance of the front anti-collision beam during laser welding, this example discloses the following technical solution: the rear end of the adapter slide plate 11 included in the adapter mechanism is fixedly connected to the front telescopic part of the hydraulic cylinder 18, and the hydraulic cylinder 18 is fixedly installed at the center position behind the top surface of the loading platform 10. The adapter slide plate 11 drives the front anti-collision beam body 4 on the top surface to move to the working position at the center position inside the welding machine body 1, so as to realize the laser welding operation corresponding to the laser welding component 2 and the laser welding contact head 3 on the upper part of the welding machine body 1.

[0027] The adapter mechanism includes adapter grooves 23 located on the left and right sides of the rear of the adapter slide plate 11. The adapter grooves 23 are slidably connected to the lower end of the adapter carriage 8. A double-acting screw 13 is rotatably mounted on the lower part of the adapter slide plate 11 via bearings. The double-acting screw 13 is threadedly connected to the lower end of the adapter carriage 8 inside the adapter slide plate 11. The adapter mechanism includes a transmission gear 16, which is fixedly mounted on the left and right ends of the double-acting screw 13. A transmission gear block 17 is meshed with the lower part of the transmission gear 16. The transmission gear block 17 is fixedly mounted at equal intervals on the left and right sides of the top surface of the loading platform 10. The adapter slide plate 11 moves backward on the top surface of the loading platform 10, driving the adapter fitting 5 at the top of the adapter carriage 8 to be fitted onto the connecting plate 6 at the rear end of the front anti-collision beam body 4.

[0028] like Figures 7-9 As shown, the hydraulic cylinder 18 inside the welding machine body 1 operates, driving the adapter slide plate 11 connected to the front telescopic part to slide from front to back on the top surface of the loading platform 10. Then, the bidirectional lead screw 13 inside the adapter slide plate 11 meshes with the transmission gear 16 at the outer end with the transmission gear 17. The transmission gear 17 is fixedly installed inside the loading platform 10, thereby driving the meshing transmission gear 16 and the bidirectional lead screw 13 to rotate. The adapter slide 8, which is threadedly connected to the bidirectional lead screw 13, is limited by the adapter slide groove 23 so that the rotating bidirectional lead screw 13 drives the adapter slide 8 to drive the adapter fixture 5 connected to the elastic slide rod 7 to slide inward synchronously.

[0029] Furthermore, when the adapter slides 8 on the left and right sides above the adapter slide plate 11 drive the adapter fitting 5 to slide inward, the inner open structure of the adapter fitting 5 slides onto the outside of the connecting plate 6 at the rear end of the front anti-collision beam body 4. Thus, when the adapter slide plate 11 moves backward into place, it drives the adapter fitting 5 to slide onto the outside of the connecting plate 6, so as to achieve positioning and locking of the front anti-collision beam body 4. At the same time, the adapter slide 8 connected to the elastic slide rod 7 at the rear of the adapter fitting 5 can adapt to front anti-collision beam bodies 4 of different specifications, so as to achieve elastic sliding under different lengths, thereby achieving multi-specification length adaptation.

[0030] Example 3: To address the problems existing in the maintenance of laser welding on the front bumper beam, this example discloses the following technical solution: A fume removal mechanism is provided on the front of the welding machine body 1, and the fume removal mechanism includes a fume removal baffle 9. The fume removal baffle 9 is located at the front end of the front bumper beam body 4 to absorb fumes during laser welding operations. The fume removal mechanism includes a positioning crossbeam 19, which is fixedly installed on the upper front of the welding machine body 1. The interior of the positioning crossbeam 19 is rotatably connected to the upper end of the fume removal baffle 9 via a torsion spring. In the initial state, the fume removal baffle 9 is distributed horizontally outward on the outside of the front of the welding machine body 1. The fume removal mechanism includes a fume filter unit 20, which is fixedly installed on the side of the fume removal baffle 9 away from the welding machine body 1. Adsorption nozzles 21 are fixedly installed at equal intervals on the surface of the fume removal baffle 9 near the welding machine body 1, and the adsorption nozzles 21 are connected to the fume filter unit 20 on the front of the fume removal baffle 9.

[0031] The smoke removal mechanism includes a traction steel cable 22, the front end of which is fixedly connected to the left and right sides above the back of the smoke removal baffle 9, and the middle part of the traction steel cable 22 passes through the left and right sides inside the welding machine body 1. The rear end of the traction steel cable 22 is fixedly connected to the left and right sides of the top surface of the adapter slide plate 11. After the adapter slide plate 11 moves the front anti-collision beam body 4 into place, it drives the smoke removal baffle 9 to rotate downward to a vertical state to achieve welding smoke removal. The mechanism also includes a laser welding assembly 2 fixedly installed in the middle of the top surface inside the welding machine body 1. The lower end of the laser welding assembly 2 is connected to a laser welding contact head 3 by a robotic arm. The laser welding assembly 2 is used to perform welding operations on the front anti-collision beam body 4 inside the welding machine body 1. like Figures 4-5 , Figure 10As shown, during the backward sliding process of the adapter slide plate 11 inside the welding machine body 1, it drives the traction steel cables 22 fixedly connected on the left and right sides of the top surface to be stretched and tightened. After the middle part of the traction steel cable 22 passes through the interior of the welding machine body 1, it drives the smoke removal baffle 9 fixedly connected at the front end to be pulled, so that the smoke removal baffle 9 rotates downward inside the positioning crossbeam 19, so that the smoke removal baffle 9 rotates to a vertical position in front of the front anti-collision beam body 4, thereby avoiding the impact of smoke and dust on the efficiency of laser welding during the welding operation.

[0032] Furthermore, the laser welding assembly 2 inside the welding machine body 1 is moved by the laser welding contact head 3 connected to the lower robotic arm. The laser welding contact head 3 then performs welding maintenance on the positioned front bumper beam body 4. At the same time, the smoke filter unit 20 on the outer wall of the smoke baffle 9 performs its operation. The smoke generated during the welding of the corresponding side of the front bumper beam body 4 is drawn out through the through-connected adsorption nozzle 21, thereby improving the efficiency of the welding maintenance of the front bumper beam body 4.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding fixture for maintaining a front bumper beam of an automobile, comprising a welding machine body (1) and a laser welding assembly (2) fixedly installed in the middle of the top surface inside the welding machine body (1), wherein the lower end of the laser welding assembly (2) is connected to a laser welding contact head (3) by a robotic arm for welding the front bumper beam body (4) inside the welding machine body (1); Its features are, Also includes: The welding machine body (1) is provided with an adapter mechanism at the bottom inside, and the adapter mechanism includes an adapter fixture (5), and the adapter fixture (5) is sleeved on the connecting plates (6) on the left and right sides of the rear end of the front anti-collision beam body (4). Among them, the adapter (5) is distributed in a "C" shape with opposite directions and inward opening, and the rear end of the adapter (5) is connected to the top of the adapter slide (8) by an elastic slide rod (7); The welding machine body (1) is provided with a smoke removal mechanism on the front side, and the smoke removal mechanism includes a smoke removal baffle (9). The smoke removal baffle (9) is located at the front end of the front anti-collision beam body (4) to absorb the smoke and dust during laser welding operations.

2. The welding fixture for maintaining a front bumper beam of an automobile according to claim 1, characterized in that: The adapter mechanism includes a material loading platform (10), which is fixedly installed inside the lower part of the welding machine body (1). An adapter slide plate (11) is slidably installed on the top surface of the material loading platform (10). Slag-blocking arc plates (12) are fixedly installed on both the left and right sides of the front of the adapter slide plate (11). The adapter slide plate (11) is used to support the front anti-collision beam body (4).

3. The welding fixture for maintaining a front bumper beam of an automobile according to claim 2, characterized in that: The adapter mechanism includes adapter grooves (23) on the left and right sides of the rear of the adapter slide (11), and the adapter grooves (23) are slidably connected to the lower end of the adapter slide (8). A two-way screw (13) is rotatably installed in the lower part of the adapter slide (11) through a bearing, and the two-way screw (13) is threadedly connected to the lower end of the adapter slide (8) inside the adapter slide (11).

4. The welding fixture for maintaining a front bumper beam of an automobile according to claim 3, characterized in that: The adapter mechanism includes a bottom support column (14), which is fixedly installed on the left and right sides of the top surface of the bottom support plate (15). The bottom support plate (15) is fixedly installed at the center position in front of the top surface of the adapter slide plate (11). The upper end of the bottom support column (14) is attached to the middle of the bottom surface of the front anti-collision beam body (4) to support the weight of the front anti-collision beam body (4) and improve stability.

5. The welding fixture for maintaining a front bumper beam of an automobile according to claim 1, characterized in that: The adapter mechanism includes a transmission gear (16), which is fixedly installed on the left and right ends of the bidirectional lead screw (13). A transmission gear block (17) is meshed below the transmission gear (16), and the transmission gear block (17) is fixedly installed at equal distances on the left and right sides of the top surface of the loading platform (10). The adapter slide plate (11) moves backward on the top surface of the loading platform (10), driving the adapter fitting (5) at the top of the adapter slide (8) to be sleeved on the connecting plate (6) at the rear end of the front anti-collision beam body (4).

6. The welding fixture for maintaining a front bumper beam of an automobile according to claim 5, characterized in that: The adapter mechanism includes an adapter slide (11) whose rear end is fixedly connected to the front telescopic part of the hydraulic cylinder (18), and the hydraulic cylinder (18) is fixedly installed at the center position behind the top surface of the loading platform (10). The adapter slide (11) drives the front anti-collision beam body (4) on the top surface to move to the working position at the center position inside the welding machine body (1), and realizes laser welding operation corresponding to the laser welding assembly (2) and laser welding contact head (3) on the upper part inside the welding machine body (1).

7. The welding fixture for maintaining a front bumper beam of an automobile according to claim 1, characterized in that: The smoke removal mechanism includes a positioning crossbeam (19), which is fixedly installed on the front of the welding machine body (1). The interior of the positioning crossbeam (19) is rotatably connected to the upper end of the smoke removal baffle (9) by a torsion spring. In the initial state, the smoke removal baffle (9) is distributed on the front exterior of the welding machine body (1) in a horizontal outward manner.

8. The welding fixture for maintaining a front bumper beam of an automobile according to claim 7, characterized in that: The smoke removal mechanism includes a smoke filter unit (20), and the smoke filter unit (20) is fixedly installed on the side of the smoke removal baffle (9) away from the welding machine body (1). Adsorption nozzles (21) are fixedly installed at equal intervals on the side surface of the smoke removal baffle (9) close to the welding machine body (1), and the adsorption nozzles (21) are connected to the smoke filter unit (20) on the front of the smoke removal baffle (9).

9. A welding fixture for maintaining a front bumper beam of an automobile according to claim 8, characterized in that: The smoke removal mechanism includes a traction cable (22), and the front end of the traction cable (22) is fixedly connected to the left and right sides above the back of the smoke removal baffle (9). The middle part of the traction cable (22) passes through the left and right sides inside the welding machine body (1). The rear end of the traction cable (22) is fixedly connected to the left and right sides of the top surface of the adapter plate (11). After the adapter plate (11) drives the front anti-collision beam body (4) to move into place, it drives the smoke removal baffle (9) to rotate downward to a vertical state to achieve welding smoke removal.

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