Automobile door bumper bar welding machine

Abstract

The invention relates to the technical field of automobile door welding, and discloses an automobile door bumper bar welding machine which comprises a welding workbench, a feeding conveying table is connected to the front end of the welding workbench, a discharging conveying table is connected to the rear end of the welding workbench, and high-strength hydraulic boxes are fixedly arranged on the two sides of the welding workbench correspondingly. The outer side of the high-strength hydraulic box fixedly communicates with an oil control valve, multiple sets of hydraulic telescopic rods are arranged on the inner side of the high-strength hydraulic box in a linear array mode, roller seats are installed at the telescopic ends of the hydraulic telescopic rods, and rotating rollers are installed in the roller seats. According to the automobile door bumper bar welding machine, hydraulic telescopic rods which are distributed in a linear array mode are arranged on the two sides of the workbench and matched with a second electric telescopic rod and a universal adjusting base which are arranged below the built-in conveying table, a three-dimensional self-adaptive positioning system is formed, and automatic adjustment and flexible clamping can be conducted according to the curved surface shapes of automobile doors of different automobile types; the problem that a traditional special clamp is difficult to change models is effectively solved, and multi-vehicle-type mixed-line production is achieved.

Description

Technical Field

[0001] This invention relates to the field of automotive door welding technology, specifically to an automotive door anti-collision bar welding machine. Background Technology

[0002] In the automotive manufacturing industry, car doors, as a major safety component, typically require welded anti-collision bars inside to enhance side impact resistance.

[0003] Traditional automotive door bumper welding equipment typically includes a fixed welding worktable and a welding robot positioned above it. Before welding, the door workpiece needs to be fixed on the worktable, and the bumper needs to be positioned in a preset location inside the door.

[0004] In the existing technology, rigid clamps or positioning pins are mostly used to fix car doors. These clamps are usually specially designed for the shape of the door panel of a specific car model.

[0005] However, as market demand shifts towards personalization and small-batch production, a single production line often needs to be compatible with the production of multiple car models. Different car models have significant differences in door size, curvature, and structure, and traditional dedicated fixtures cannot adapt to these variations, resulting in poor equipment versatility. Each time production models are switched, a significant amount of time is required for fixture replacement and adjustment, severely impacting production efficiency and increasing production costs.

[0006] In addition, it is crucial to ensure the precise relative position between the car door and the crash bar during the welding process. Existing equipment is difficult to achieve rapid and accurate attitude adjustment when clamping car doors of different shapes, which can easily lead to positioning errors.

[0007] Therefore, we propose a welding machine for automotive door anti-collision bars to solve the problems mentioned above. Summary of the Invention

[0008] This invention provides a welding machine for automotive door anti-collision bars, which can solve the problem that existing automotive door welding equipment often uses rigid clamps or positioning pins to fix the doors. Moreover, these clamps are usually specially designed for the shape of door panels of specific car models. When switching production models, a lot of time is required to replace and adjust the clamps, which seriously affects production efficiency.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A welding machine for automotive door anti-collision bars includes a welding worktable. A feeding conveyor is connected to the front end of the welding worktable, and a discharging conveyor is connected to the rear end. High-strength hydraulic tanks are fixedly installed on both sides of the welding worktable. Oil control valves are fixedly connected to the outer sides of the high-strength hydraulic tanks. Multiple sets of hydraulic telescopic rods are arranged in a linear array inside the high-strength hydraulic tanks. Roller seats are installed at the telescopic ends of the hydraulic telescopic rods, and rotating rollers are installed inside the roller seats. A pile frame is installed outside the worktable, and an anti-collision bar positioning mechanism and an intelligent welding mechanism are installed on the pile frame. Multiple industrial cameras are installed on the pile frame.

[0010] Preferably, the hydraulic telescopic rod includes a hydraulic cylinder, one end of which is fixedly connected to the interior of a high-strength hydraulic tank. A piston is slidably connected inside the hydraulic cylinder, and a push rod is fixedly connected to the side of the piston away from the high-strength hydraulic tank. The movement of the piston is controlled by hydraulic oil entering the hydraulic cylinder from inside the high-strength hydraulic tank, thereby controlling the sliding of the push rod.

[0011] Preferably, the pile frame includes two sets of U-shaped frames, which are respectively set at both ends of the workbench, and their bottoms are fixedly connected to the ground.

[0012] Preferably, the anti-collision bar positioning mechanism includes a second linear drive rail, which is installed between and fixedly connected to two sets of U-shaped frames. A second drive seat is provided on the second linear drive rail, and a first electric telescopic rod is fixedly connected to the second drive seat. A pick-and-place component is installed on the telescopic end of the first electric telescopic rod.

[0013] Preferably, the pick-and-place assembly includes a first adjusting seat and a second adjusting seat. The first adjusting seat is connected to the telescopic end of the first electric telescopic rod, and the second adjusting seat is located at the end of the first adjusting seat away from the first electric telescopic rod. The first adjusting seat and the second adjusting seat are used for lateral and longitudinal rotation adjustment, respectively.

[0014] Preferably, a strong magnetic suction plate is fixedly installed on the second adjustment seat, and the strong magnetic suction plate is used for the magnetic fixation and release of the anti-collision bar.

[0015] Preferably, the intelligent welding mechanism is provided in two sets and symmetrically arranged on both sides of the second linear drive rail. The intelligent welding mechanism includes a first linear drive rail, a first drive seat is provided on the first linear drive rail, a multi-axis robotic arm is installed on the first drive seat, a welding torch is installed on the movable end of the multi-axis robotic arm, and the welding torch is located above the welding worktable.

[0016] Preferably, the upper end of the welding workbench is provided with a built-in conveyor for conveying the car door. The built-in conveyor includes multiple conveyor rollers, which are used to drive the car door to be conveyed, and their surfaces are provided with a rubber layer.

[0017] Preferably, the built-in conveyor platform is equipped with an array of second electric telescopic rods, and the top of the second electric telescopic rod is equipped with a universal adjustment seat.

[0018] Preferably, the universal adjustment seat includes a universal ball fixedly connected to the telescopic end of the second electric telescopic rod. A rotating seat is provided around the universal ball, and a strong electromagnetic suction block is fixedly connected to the outside of the rotating seat. When the strong electromagnetic suction block is energized, it is used to attract and fix the surface of the car door. The second electric telescopic rod pushes the universal ball, the universal ball pushes the rotating seat, and the rotating seat drives the car door to adjust its height and posture. It can also work in conjunction with the hydraulic telescopic rods on both sides to push the roller seat and the rotating roller to adjust the posture of the car door.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are: This invention achieves automated door transfer through an infeed conveyor, an internal conveyor, and an outfeed conveyor, improving production efficiency. A linear array of hydraulic telescopic rods is installed on both sides of the workbench, working in conjunction with a second electric telescopic rod and a universal adjustment seat below the internal conveyor to form a three-dimensional adaptive positioning system. This system can automatically adjust and flexibly clamp according to the curved shape of different car door models, effectively solving the problem of difficult model changeover with traditional dedicated fixtures and enabling mixed-model production on a single line. Furthermore, industrial cameras and grating sensors are used for visual positioning to ensure the accuracy of anti-collision bar placement and welding.

[0020] The anti-collision bar positioning mechanism achieves rapid, non-destructive gripping and precise placement of the anti-collision bars through multi-degree-of-freedom adjustment and strong magnetic suction plates; the symmetrically arranged intelligent welding mechanism can operate simultaneously on both sides of the door, ensuring welding quality and efficiency. The entire system is highly automated, accurately positioned, and highly adaptable, significantly improving production flexibility and product quality while reducing labor costs and the risk of workpiece damage. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a schematic diagram of the front structure of the present invention; Figure 3 This is a side cross-sectional view of the present invention; Figure 4 For the present invention Figure 3 A magnified structural diagram at point A; Figure 5 This is a schematic diagram of the overall side view structure of the present invention; Figure 6 For the present invention Figure 5 A magnified structural diagram at point B.

[0022] The components include: 1. Welding workbench; 2. Feed conveyor; 3. Discharge conveyor; 4. High-strength hydraulic tank; 5. Hydraulic telescopic rod; 6. Roller seat; 7. Rotating roller; 8. Oil control valve; 11. Pile frame; 12. First linear drive guide rail; 13. First drive seat; 14. Multi-axis robotic arm; 15. Welding torch; 16. Second linear drive guide rail; 17. Second drive seat; 18. First electric telescopic rod; 19. First adjusting seat; 20. Second adjusting seat; 21. Magnetic suction plate; 31. Built-in conveyor table; 32. Conveying roller; 33. Second electric telescopic rod; 34. Universal adjusting seat; 35. Strong electromagnetic suction block. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0024] Example 1: Please see Figure 1-6 The present invention provides a technical solution: A welding machine for automotive door anti-collision bars includes a welding workbench 1. A feeding conveyor 2 is connected to the front end of the welding workbench 1, and a discharging conveyor 3 is connected to the rear end of the welding workbench 1. High-strength hydraulic tanks 4 are fixedly installed on both sides of the welding workbench 1. An oil control valve 8 is fixedly connected to the outside of the high-strength hydraulic tanks. Multiple sets of hydraulic telescopic rods 5 are arranged in a linear array inside the high-strength hydraulic tanks 4. Roller seats 6 are installed at the telescopic ends of the hydraulic telescopic rods 5. Rotating rollers 7 are installed inside the roller seats 6. A pile frame 11 is set outside the workbench. An anti-collision bar positioning mechanism and an intelligent welding mechanism are set on the pile frame 11.

[0025] In the above scheme, the car door to be welded is fed into the welding workbench 1 by the feeding conveyor 2, and the position of the car door is accurately sensed by the grating position sensors at both ends of the conveyor. Then, multiple industrial cameras on the pile frame 11 scan the three-dimensional contour of the inner cavity of the car door and feed the data back to the control system. Then, multiple sets of hydraulic telescopic rods 5 connected to the high-strength hydraulic tank 4 on both sides of the workbench work together. The multiple sets of hydraulic telescopic rods 5 are arranged in a linear array and push the rotating rollers 7 at their ends to adaptively abut against the inner panels of the car door with different curvatures from both sides of the car door, forming a flexible multi-point clamping. At the same time, the design of the rotating rollers 7 avoids scratching the workpiece. Meanwhile, the anti-collision bar positioning mechanism, with the assistance of the vision system, accurately grasps and positions the anti-collision bar to the preset welding position inside the car door. Subsequently, the intelligent welding mechanism, which is also installed on the pile frame 11, performs automated welding of the joint between the anti-collision bar and the car door. After completion, all actuators are reset, and the welded door assembly is sent out via the unloading conveyor 3. This solution replaces the traditional dedicated rigid fixture with an array of independently controllable hydraulic telescopic rods 5 on both sides, allowing them to actively adapt to the complex three-dimensional contours of different car models' doors, just like countless flexible fingers. This solves the core problem of poor equipment versatility and low production changeover efficiency caused by the use of dedicated fixtures in existing technologies, and enables rapid and accurate positioning and fixing for multi-model mixed-line production.

[0026] The hydraulic telescopic rod 5 includes a hydraulic cylinder, one end of which is fixedly connected to the inside of the high-strength hydraulic tank 4. A piston is slidably connected inside the hydraulic cylinder, and a push rod is fixedly connected to the side of the piston away from the high-strength hydraulic tank 4. The movement of the piston is controlled by the hydraulic oil entering the hydraulic cylinder from inside the high-strength hydraulic tank 4, thereby controlling the sliding of the push rod.

[0027] In the above scheme, the working principle of the hydraulic telescopic rod 5 is as follows: the hydraulic cylinder, as a pressure-bearing component, has one end fixed and connected to the inside of the high-strength hydraulic tank 4, forming a unified pressure source; when it is necessary to clamp the car door, high-pressure hydraulic oil is pressed from the high-strength hydraulic tank 4 into the hydraulic cylinder, pushing the piston inside to slide, and the piston directly drives the push rod fixedly connected to it to extend outward; the thrust of the push rod is transmitted to the car door through the roller seat 6 and the rotating roller 7 at its end, forming a stable clamping force; conversely, when the hydraulic oil flows back, under the external reset mechanism or the reaction force of the car door, the piston drives the push rod to retract, releasing the clamp; this design converts the concentrated hydraulic power into multiple independent linear clamping actions, and through the array of actuators, it can provide a powerful and controllable clamping force to position and clamp the car door.

[0028] The pile frame 11 includes two sets of U-shaped frames, which are respectively set at both ends of the workbench, and their bottoms are fixedly connected to the ground.

[0029] Two sets of U-shaped frames, respectively set at both ends of the workbench and firmly fixed to the ground, form a rigid gantry frame spanning the entire work area. The function of this frame is to suspend the anti-collision bar positioning mechanism and the intelligent welding mechanism directly above the welding workbench 1, ensuring that they have extremely high stability during operation, thereby eliminating positioning errors caused by mechanism vibration or deformation, and providing a structural foundation for the accuracy of the entire welding process.

[0030] The anti-collision bar positioning mechanism includes a second linear drive rail 16, which is installed between and fixedly connected to two sets of U-shaped frames. A second drive seat 17 is provided on the second linear drive rail 16, and a first electric telescopic rod 18 is fixedly connected to the second drive seat 17. A pick-and-place component is installed at the telescopic end of the first electric telescopic rod 18.

[0031] In the above scheme, the second linear drive rail 16 spans and is fixed between the two sets of U-shaped frames, providing a degree of freedom of movement along the length of the door; the second drive seat 17 mounted on it can slide along the second linear drive rail 16. This causes the end effector of the anti-collision bar positioning mechanism to move to the preset welding position inside the door; the first electric telescopic rod 18, fixed on the second drive seat 17, provides vertical lifting movement, thereby achieving precise positioning of the pick-up and put-down components in height; and achieving preliminary positioning of the anti-collision bar in the horizontal and vertical planes.

[0032] The pick-and-place assembly includes a first adjusting seat 19 and a second adjusting seat 20. The first adjusting seat 19 is connected to the telescopic end of the first electric telescopic rod 18, and the second adjusting seat 20 is located at the end of the first adjusting seat 19 away from the first electric telescopic rod 18. The first adjusting seat 19 and the second adjusting seat 20 are used for lateral and longitudinal rotation adjustment, respectively.

[0033] In the above scheme, the first adjustment seat 19 is connected to the telescopic end of the first electric telescopic rod 18 and is used for rotational adjustment around the vertical axis; the second adjustment seat 20 is set at the end of the first adjustment seat 19 and is used for rotational adjustment around the horizontal axis; the two adjustment seats work together to provide two rotational degrees of freedom for the pick-up and put-down components, so that the strong magnetic suction plate 21 fixed at its end can flexibly adjust its spatial posture, thereby allowing the anti-collision bar to be accurately aligned with the complex target welding position in the inner cavity of the car door, achieving fine angle alignment.

[0034] A strong magnetic suction plate 21 is fixedly installed on the second adjustment seat 20. The strong magnetic suction plate 21 is used for the magnetic fixation and release of the anti-collision bar.

[0035] In the above scheme, the pick-and-place component is fixedly installed on the second adjustment seat 20 and moves with the entire anti-collision bar positioning mechanism; when it is necessary to grab the anti-collision bar, the strong magnetic suction plate 21 is energized to generate a strong electromagnetic attraction force, which firmly attracts the anti-collision bar to its surface, realizing fast and non-destructive grabbing and fixing. The anti-collision bar is transported to the target position inside the car door. After welding and fixing, the strong magnetic suction plate 21 is de-energized, the electromagnetic attraction disappears instantly, and the anti-collision bar is precisely released into place. This magnetic fixing method does not require complex mechanical clamps, is highly adaptable, and can quickly handle anti-collision bars of different specifications, greatly improving the efficiency and reliability of grasping and releasing.

[0036] Example 2: Please see Figure 1-6Furthermore, in conjunction with Embodiment 1, it is further obtained that the intelligent welding mechanism is provided with two sets symmetrically arranged on both sides of the second linear drive guide rail 16. The intelligent welding mechanism includes a first linear drive guide rail 12, a first drive seat 13 is provided on the first linear drive guide rail 12, a multi-axis robotic arm 14 is installed on the first drive seat 13, a welding torch 15 is installed on the movable end of the multi-axis robotic arm 14, and the welding torch 15 is arranged above the welding workbench 1.

[0037] In the above scheme, two sets of mechanisms symmetrically arranged on both sides of the second linear drive rail 16 form an operation system capable of welding from both sides of the car door simultaneously. The first linear drive rail 12 of each set provides a wide range of movement for the welding torch 15 along the longitudinal direction of the car door, and the first drive seat 13 mounted on it can accurately stop at any welding starting point. The multi-axis robotic arm 14 on the first drive seat 13 provides multiple degrees of freedom for micro-motion adjustment in multiple directions, so that the welding torch 15 at its active end can flexibly adjust its spatial posture and angle, thereby accurately reaching the complex and hidden weld position between the anti-collision bar and the inner panel of the car door cavity, and always maintaining the best welding posture, thereby ensuring welding quality and efficiency.

[0038] The upper end of the welding workbench 1 is provided with an internal conveying platform 31 for conveying car doors. The internal conveying platform 31 includes multiple conveying rollers 32, which are used to drive the car doors to be conveyed, and their surfaces are provided with a rubber layer. The built-in conveyor platform 31 is equipped with array-distributed second electric telescopic rods 33, and the top of the second electric telescopic rods 33 is equipped with a universal adjustment seat 34.

[0039] The built-in conveyor table 31 is a component of the welding workbench 1, consisting of multiple parallel conveyor rollers 32. It is responsible for supporting and transporting the car door before and after welding. When the car door needs to be sent into or out of the welding station, the drive system drives all the conveyor rollers 32 to rotate synchronously, using friction to smoothly move the car door. Simultaneously, the rubber layer covering the surface of the conveyor rollers 32 plays a crucial role in buffering and protecting the door, effectively preventing hard scratches on the paint or sheet metal during transport, achieving lossless transport of the workpiece on the automated production line. Multiple second electric telescopic rods 33 are distributed in an array below the built-in conveyor table 31. After the car door is transported to the predetermined welding position by the conveyor rollers 32, the control system can independently control each second electric telescopic rod 33 to precisely extend and retract at different strokes according to instructions. This allows them to lift together, and the universal adjustment seat 34 at the top contacts and supports different parts of the inner panel of the car door, thereby actively adjusting the local height of the car door from below. This, in conjunction with the hydraulic telescopic rods 5 on the sides, completes the leveling and fixing of the entire car door's three-dimensional posture.

[0040] The universal adjustment seat 34 includes a universal ball fixedly connected to the telescopic end of the second electric telescopic rod 33. A rotating seat is provided around the universal ball, and a strong electromagnetic suction block 35 is fixedly connected to the outside of the rotating seat. When the strong electromagnetic suction block 35 is energized, it is used to attract and fix the car door surface. The second electric telescopic rod 33 pushes the universal ball, which in turn pushes the rotating seat. The rotating seat then adjusts the height of the car door, thus adjusting its posture. It can simultaneously cooperate with the hydraulic telescopic rods 5 on both sides to push the roller seat 6 and the rotating roller 7 to adjust the car door's posture.

[0041] When the second electric telescopic rod 33 below it is pushed upward, it will push the universal ball fixedly connected to its telescopic end to rise together; the universal ball is embedded in the rotating seat, allowing the rotating seat to deflect freely in multiple directions; the strong electromagnetic suction block 35 fixed to the outside of the rotating seat will firmly adhere to the inner surface of the door after being energized, connecting the rotating seat and the door into a whole; at this time, the continued lifting or retraction of the second electric telescopic rod 33 will drive the adsorbed part of the door panel to adjust its height and self-adapt its angle through the universal ball and the rotating seat, and at the same time, cooperate with the clamping force of the side hydraulic telescopic rod 5 to complete the precise posture adjustment and locking of the door with complex curved surface.

[0042] The complete working principle of this car door anti-collision bar welding machine: The car door to be welded is first smoothly fed into the welding workbench 1 area by the feeding conveyor 2. When it passes the grating position sensors at both ends of the workbench, the system accurately senses that the car door has been delivered to the correct position. Subsequently, multiple industrial cameras fixed on the pile frame 11 are started simultaneously to quickly scan the three-dimensional contour of the car door cavity placed on the built-in conveyor 31 and feed the contour data back to the central control system in real time.

[0043] Based on the 3D data of the car door acquired by the vision system, the control system activates two key positioning systems: First, the lower positioning system uses multiple second electric telescopic rods 33 arranged in an array under the built-in conveyor platform 31 to precisely extend and retract at different strokes according to instructions, pushing the top universal adjustment seat 34 to contact the inner panel of the car door; the strong electromagnetic suction block 35 in the universal adjustment seat 34 is energized to generate a strong suction force, which firmly connects the rotating seat to the inner surface of the car door. Through the free deflection characteristics of the universal ball, the height and angle of each part of the car door can be adaptively adjusted as the second electric telescopic rods 33 are raised.

[0044] At the same time, the side positioning system is activated simultaneously. Multiple sets of hydraulic telescopic rods 5 in the high-strength hydraulic tanks 4 on both sides of the welding workbench 1 work together in a linear array. The hydraulic oil pushes the piston in the hydraulic cylinder, causing the top rod to drive the end roller seat 6 and rotating roller 7 to adaptively abut against the door with different curvatures from both sides of the door, thus forming a three-dimensional coordinated clamping and leveling.

[0045] After the car door is precisely fixed, the anti-collision bar positioning mechanism starts to work: the second linear drive guide rail 16 spanning between the two sets of U-shaped frames drives the second drive seat 17 to move to the anti-collision bar loading position, and the first electric telescopic rod 18 descends to bring the pick-and-place component close to the anti-collision bar; through the coordinated rotation adjustment of the first adjustment seat 19 and the second adjustment seat 20, the strong magnetic suction plate 21 fixed on the second adjustment seat 20 approaches the anti-collision bar in the best posture; the strong magnetic suction plate 21 generates electromagnetic attraction when energized, and after firmly gripping the anti-collision bar, the entire positioning mechanism precisely positions it to the preset welding position inside the car door that has been adjusted.

[0046] Subsequently, two sets of intelligent welding mechanisms symmetrically arranged on both sides of the second linear drive rail 16 operate synchronously: the first linear drive rail 12 of each intelligent welding mechanism drives the first drive seat 13 to move longitudinally along the door, and the multi-axis robotic arm 14 on the first drive seat 13 performs multi-degree-of-freedom fine adjustment so that the welding torch 15 installed at its active end can accurately reach the complex weld seam area between the anti-collision bar and the inner panel of the door to complete high-quality welding.

[0047] After welding is completed, all actuators are reset in sequence: the strong magnetic suction plate 21 is de-energized and releases the anti-collision bar, the hydraulic telescopic rod 5 retracts and releases the lateral clamping, the universal adjustment seat 34 is de-energized and lowers, and the finally welded door assembly is transported by the built-in conveyor 31 to the discharge conveyor 3, completing the entire welding process.

[0048] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A welding machine for automotive door anti-collision bars, comprising a welding workbench (1), characterized in that: The front end of the welding workbench (1) is connected to the feeding conveyor (2), and the rear end of the welding workbench (1) is connected to the discharging conveyor (3). High-strength hydraulic tanks (4) are fixedly installed on both sides of the welding workbench (1). Oil control valves (8) are fixedly connected to the outside of the high-strength hydraulic tanks. Multiple sets of hydraulic telescopic rods (5) are linearly arrayed inside the high-strength hydraulic tanks (4). Roller seats (6) are installed at the telescopic ends of the hydraulic telescopic rods (5). Rotating rollers (7) are installed inside the roller seats (6). A pile frame (11) is set outside the workbench. Anti-collision rod positioning mechanism and intelligent welding mechanism are set on the pile frame (11). Multiple industrial cameras are installed on the pile frame (11). Grating position sensors are set at both ends of the welding workbench (1).

2. The automotive door anti-collision bar welding machine according to claim 1, characterized in that: The hydraulic telescopic rod (5) includes a hydraulic cylinder. One end of the hydraulic cylinder is fixedly connected to the inside of the high-strength hydraulic tank (4). A piston is slidably connected inside the hydraulic cylinder. A push rod is fixedly connected to the side of the piston away from the high-strength hydraulic tank (4). The movement of the piston is controlled by the hydraulic oil entering the hydraulic cylinder from the inside of the high-strength hydraulic tank (4), thereby controlling the sliding of the push rod.

3. The automotive door anti-collision bar welding machine according to claim 1, characterized in that: The pile frame (11) includes two sets of U-shaped frames, which are respectively set at both ends of the workbench, and their bottoms are fixedly connected to the ground.

4. The automotive door anti-collision bar welding machine according to claim 2, characterized in that: The anti-collision bar positioning mechanism includes a second linear drive rail (16), which is installed between two sets of U-shaped frames and fixedly connected to them. A second drive seat (17) is provided on the second linear drive rail (16), and a first electric telescopic rod (18) is fixedly connected to the second drive seat (17). The telescopic end of the first electric telescopic rod (18) is equipped with a pick-and-place component.

5. The automotive door anti-collision bar welding machine according to claim 4, characterized in that: The pick-and-place assembly includes a first adjusting seat (19) and a second adjusting seat (20). The first adjusting seat (19) is connected to the telescopic end of the first electric telescopic rod (18). The second adjusting seat (20) is located at the end of the first adjusting seat (19) away from the first electric telescopic rod (18). The first adjusting seat (19) and the second adjusting seat (20) are used for lateral and longitudinal rotation adjustment, respectively.

6. The automotive door anti-collision bar welding machine according to claim 5, characterized in that: A strong magnetic suction plate (21) is fixedly installed on the second adjustment seat (20). The strong magnetic suction plate (21) is used for the magnetic fixation and release of the anti-collision bar.

7. The automotive door anti-collision bar welding machine according to claim 1, characterized in that: The intelligent welding mechanism is provided with two sets and symmetrically arranged on both sides of the second linear drive rail (16). The intelligent welding mechanism includes a first linear drive rail (12), a first drive seat (13) is provided on the first linear drive rail (12), a multi-axis robotic arm (14) is installed on the first drive seat (13), a welding gun (15) is installed on the movable end of the multi-axis robotic arm (14), and the welding gun (15) is located above the welding workbench (1).

8. The automotive door anti-collision bar welding machine according to claim 1, characterized in that: The upper end of the welding workbench (1) is provided with an internal conveying platform (31) for conveying car doors. The internal conveying platform (31) includes multiple conveying rollers (32). The conveying rollers (32) are used to drive the car doors to be conveyed, and their surfaces are provided with a rubber layer.

9. A welding machine for automotive door anti-collision bars according to claim 8, characterized in that: The built-in conveyor platform (31) is equipped with array-distributed second electric telescopic rods (33), and the top of the second electric telescopic rods (33) is equipped with a universal adjustment seat (34).

10. A welding machine for automotive door anti-collision bars according to claim 9, characterized in that: The universal adjustment seat (34) includes a universal ball fixedly connected to the telescopic end of the second electric telescopic rod (33). A rotating seat is provided around the universal ball. A strong electromagnetic suction block (35) is fixedly connected to the outside of the rotating seat. When the strong electromagnetic suction block (35) is energized, it is used to attract and fix the surface of the car door. The second electric telescopic rod (33) pushes the universal ball, the universal ball pushes the rotating seat, and the rotating seat drives the car door to adjust its height and adjust its posture. It can also work with the hydraulic telescopic rods (5) on both sides to push the roller seat (6) and the rotating roller (7) to adjust the posture of the car door.

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