A welding device for processing motor vehicle accessories

Abstract

The application relates to the technical field of automobile part manufacturing, in particular to a welding device for motor vehicle accessory machining, which solves the problems that the existing technology is inconvenient for reasonable clamping and limiting of accessories of different shapes and the accessories are prone to displacement and shaking during the welding process. The welding device for motor vehicle accessory machining comprises a welding rack and a vertical lifting module installed on one side of the top of the welding rack through a horizontal adjusting module, the inner top of the welding rack is detachably connected with a cross bar, the inner bottom is slidably provided with internal moving plates on the two sides, the top of the internal moving plates is provided with moving columns moving between the cross bars, the two internal moving plates are connected through a bidirectional synchronous moving structure, and the moving columns are connected with flexible deformable clamping structures on one side. Through cooperation of adsorption and flexible self-adaptive clamping, stable wrapping and fixing of special-shaped accessories are realized, and the welding quality and the machining efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts manufacturing technology, and in particular to a welding apparatus for processing motor vehicle parts. Background Technology

[0002] Automotive parts processing plays a crucial role in the automotive parts manufacturing industry. As a core guarantee for vehicle safety and performance, the processing precision and connection quality of automotive parts have a decisive impact on the reliability and service life of the entire vehicle. Especially in the core process of welding, existing welding equipment is gradually revealing significant limitations when handling automotive parts with diverse shapes, specifications, and complex structures.

[0003] Specifically, due to the wide variety of automotive parts and the significant differences in their geometry, size, and surface features, existing general-purpose or single-function welding equipment often lacks flexible and effective clamping and limiting mechanisms when fixing these specific shaped parts. This inconvenience in properly clamping and limiting parts of different shapes directly leads to the easy displacement or vibration of parts during the welding process, thus failing to improve welding stability and efficiency. These problems not only result in unstable weld quality and increased scrap rate, but also significantly increase the time cost and operational complexity of manually adjusting fixtures, making it difficult to meet the demands of modern automotive manufacturing for mass production and high precision. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device for processing motor vehicle parts, which solves the problem that existing general-purpose or single-function welding equipment often lacks a flexible and effective clamping and limiting mechanism when fixing parts of specific shapes. This inconvenience in clamping and limiting parts of different shapes directly leads to the problem that parts are prone to displacement or vibration during the welding process, thus failing to improve the stability and efficiency of welding.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A welding device for processing motor vehicle parts includes a welding frame and a welding module. A vertical lifting module is installed on the top side of the welding frame via a horizontal adjustment module. The welding module is installed at the lifting end of the vertical lifting module. Several crossbars are detachably connected to the inner top of the welding frame. Internal moving plates are slidably arranged on both sides of the inner bottom of the welding frame. Several moving columns are linearly arrayed on the top of the internal moving plates and arranged between the crossbars. Two internal moving plates are connected by a bidirectional synchronous moving structure. Each of the movable columns is detachably connected to a flexible deformable clamping structure on one side. Several bottom support plates are provided at the top center of the welding frame. Each of the bottom support plates is provided with an adsorption limiting structure at its top, and the bottom support plates are interconnected through a connecting structure.

[0006] Preferably, the bottom support plate has semi-circular support seats that are adapted to the crossbars fixedly connected to both sides of the bottom, and each semi-circular support seat is adapted to and snapped into the adjacent crossbar.

[0007] Preferably, the bidirectional movable structure includes two rotating seats respectively disposed on both sides between the internal movable plates and a central seat disposed at the center of the two rotating seats. A bidirectional lead screw is rotatably connected inside the central seat. A drive motor is installed on one side of the welding frame. One end of the bidirectional lead screw is rotatably connected to the inner wall of the welding frame, and the other end rotatably passes through the side wall of the welding frame and is connected to the output shaft of the drive motor. Both rotating seats are threadedly engaged with the bidirectional lead screw. Connecting rods are rotatably connected to both sides of the interior of the rotating seats through pins. One end of the connecting rod is rotatably connected to the adjacent internal movable plate through a pin.

[0008] Preferably, magnetic plates are fixedly connected to both sides of the bottom support plate, and the bottom support plate is made of metal.

[0009] Preferably, a support plate is bolted to the bottom of several of the movable columns, and the support plate is fixedly connected to the top of the internal movable plate.

[0010] Preferably, the flexible deformable clamping structure includes a push plate disposed at the top of several crossbars and connected to a movable column via a mounting ring, and several elastic contact plates arranged in a linear array on one side of the push plate. Each elastic contact plate has a movable round rod with one end sliding through the push plate connected to both sides. One end of the movable round rod is connected to a limit plate, and a spring is connected between the limit plate and the push plate.

[0011] Preferably, each elastic contact plate and the push plate are provided with several dampers on both sides, and several flexible contact protrusions are fixedly connected to one side of the elastic contact plate. The push plate and the mounting ring are connected by a connecting bracket.

[0012] Preferably, several guide rods are fixedly connected to both sides of the inside of the welding frame, and several guide holes adapted to the guide rods are opened on the side wall of the internal moving plate.

[0013] Preferably, the adsorption limiting structure includes a cavity opened inside the bottom support plate and a number of air inlets opened on the top of the bottom support plate and communicating with the cavity. A main pipe communicating with the cavity is fixedly connected to the center of one end of the bottom support plate, and an exhaust pipe cooperating with the main pipe is provided on one side of the top of the welding frame.

[0014] Preferably, each of the bottom support plates has two symmetrically connected connecting pipes at one end, which communicate with the interior of the cavity. The two adjacent connecting pipes are connected to each other by a U-shaped connecting hose, and the end of the connecting pipe on one side is connected to a sealing cap.

[0015] The present invention has the following beneficial effects: By employing multiple bottom support plates that can be freely combined according to the size of the parts, along with adsorption and limiting structures on their surfaces, this device provides a stable foundation and excellent pre-positioning for diverse and multi-specification automotive parts. This effectively prevents parts from shifting or loosening during initial placement. Simultaneously, a bidirectional synchronous moving structure drives the internal moving plates and columns on both sides to move synchronously in opposite directions. Combined with a flexible, deformable clamping structure that can freely move within the gaps between the crossbars, this device overcomes the limitations of traditional rigid clamps on parts of specific shapes. It can achieve adaptive, enveloping clamping for parts with various complex curved surfaces or irregular structures. This composite limiting mechanism, combining flexibility and adsorption, improves the stability and efficiency of welding, ensuring consistent weld quality and reducing scrap rates. Furthermore, this solution eliminates the need for frequent replacement or cumbersome adjustments of specialized clamps for different parts, reducing the time cost and operational complexity of manual clamp adjustments. It better meets the demands of high-volume, high-precision modern automotive parts manufacturing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the bottom support plate and exhaust pipe structure of the present invention; Figure 3 This is a schematic diagram of the welding module and the horizontal adjustment module of the present invention; Figure 4 This is a schematic diagram of the drive motor and bidirectional lead screw structure of the present invention; Figure 5This is a schematic diagram of the crossbar and guide bar structure of the present invention; Figure 6 This is a schematic diagram of the U-shaped connecting hose and the sealing cap structure of the present invention; Figure 7 This is a schematic diagram of the rotating seat and pin structure of the present invention; Figure 8 This is a schematic diagram of the guide block and guide hole structure of the present invention; Figure 9 This is a schematic diagram of the elastic contact plate and flexible contact protrusion structure of the present invention; Figure 10 This is a schematic diagram of the limiting plate and spring structure of the present invention.

[0018] In the diagram: 1. Welding frame; 2. Crossbar; 3. Internal moving plate; 4. Support plate; 5. Moving column; 6. Push plate; 7. Bottom support plate; 8. Exhaust duct; 9. Magnetic plate; 10. Vertical lifting module; 11. Welding module; 12. Horizontal adjustment module; 13. Drive motor; 14. Two-way lead screw; 15. Guide rod; 16. Air inlet; 17. Semi-circular support seat; 18. Main pipe; 19. U-shaped connecting hose; 20. Sealing cap; 21. Connecting pipe; 22. Connecting rod; 23. Rotating seat; 24. Pin; 25. Guide block; 26. Guide hole; 27. Flexible contact protrusion; 28. Elastic contact plate; 29. ​​Connecting bracket; 30. Mounting ring; 31. Moving rod; 32. Spring; 33. Limiting plate; 34. Damper. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] Example 1 Please see Figure 1 , Figure 2 and Figure 3 As shown, a welding device for processing motor vehicle parts in this embodiment includes a welding frame 1 and a welding module 11. A vertical lifting module 10 is installed on the top side of the welding frame 1 via a horizontal adjustment module 12. The welding module 11 is installed on the lifting end of the vertical lifting module 10. Several crossbars 2 are detachably connected to the inner top of the welding frame 1. Internal moving plates 3 are slidably arranged on both sides of the inner bottom of the welding frame 1. Several moving columns 5 are linearly arrayed on the top of the internal moving plates 3 and arranged between several crossbars 2. Two internal moving plates 3 are connected by a bidirectional synchronous moving structure. Each movable column 5 has a detachable flexible deformable clamping structure on one side. Several bottom support plates 7 are provided at the top center of the welding frame 1. The top of each bottom support plate 7 is provided with an adsorption limiting structure, and the bottom support plates 7 are interconnected through a connecting structure.

[0021] Please see Figures 1 to 10 As shown, when processing motor vehicle parts of different sizes and shapes, the operator first selects the appropriate number of bottom support plates 7 according to the specific geometric features and size specifications of the parts. These bottom support plates 7 are placed close together at the top of the crossbar 2, so that several bottom support plates 7 are combined to form a bottom support structure that can adapt to the current size of the parts. Then, the motor vehicle parts to be processed are placed stably on the surface composed of several bottom support plates 7. At this time, the adsorption limiting structure set on the top of the bottom support plate 7 generates an adsorption force to initially position and pre-adsorb and fix the motor vehicle parts, preventing them from slipping before subsequent clamping. Then, the bidirectional synchronous moving structure is activated. Driven by the bidirectional synchronous moving structure, the two internal moving plates 3 located on both sides of the bottom inside the welding frame 1 begin to slide in opposite directions and move closer to each other. Since the top linear array of the internal moving plates 3 has several There are several movable columns 5, which are precisely interspersed in the gaps between several crossbars 2. Therefore, as the internal movable plate 3 moves inward synchronously, the several movable columns 5 on both sides will also move towards the central part in the gaps between the crossbars 2. During the movement, the flexible deformable clamping structure installed on one side of each movable column 5 moves forward until it contacts the outline of the motor vehicle part. Because the clamping structure has the characteristics of flexible deformation, it can adapt to the irregular curved surface or specific geometric shape of the part after contacting the part and being subjected to force, thereby closely fitting the outer wall of the part and forming a wrap-around clamping limit. Finally, by cooperating with the horizontal adjustment module 12 and the vertical lifting module 10 installed on the top side of the welding frame 1, the welding working parts can be driven to perform multi-dimensional spatial position adjustment, thereby performing precise welding processing on the motor vehicle part that is firmly clamped and limited.

[0022] Example 2 Please see Figure 2 and Figure 6As shown in the embodiment, a welding device for processing motor vehicle parts has a bottom support plate 7 with semi-circular support seats 17 that are adapted to the crossbar 2 fixedly connected to both sides of the bottom. Each semi-circular support seat 17 is adapted to and snapped into the adjacent crossbar 2. Specifically, through the cooperation of the bottom support plate 7, the semi-circular support seats 17 and the crossbar 2, when the operator places the bottom support plate 7 inside the welding frame 1, the semi-circular support seats 17 can be accurately snapped into the adjacent crossbar 2, thereby improving the installation stability of the bottom support plate and preventing it from sliding back and forth or left and right when supporting the workpiece.

[0023] Please see Figure 6 As shown, magnetic plates 9 are fixedly connected to both sides of the bottom support plate 7, and the bottom support plate 7 is made of metal. Specifically, through the cooperation of the metal bottom support plate 7 and the magnetic plates 9, when multiple bottom support plates 7 are assembled close to each other on the crossbar 2, magnetic attraction is generated between adjacent magnetic plates 9, which achieves the effect of tightly fitting and splicing multiple bottom support plates 7 and avoiding gaps or height misalignment on the splicing surface.

[0024] Please see Figure 2 and Figure 6 As shown, the adsorption limiting structure includes a cavity inside the bottom support plate 7 and several air inlets 16 on the top of the bottom support plate 7 and communicating with the cavity. A main pipe 18 communicating with the cavity is fixedly connected to the center of one end of the bottom support plate 7. An exhaust pipe 8 cooperating with the main pipe 18 is provided on one side of the top of the welding frame 1. Specifically, by opening a cavity inside the bottom support plate 7, opening air inlets 16 on the top, and cooperating with the main pipe 18 and the exhaust pipe 8, an external exhaust device is connected to the exhaust pipe 8 and uses the main pipe 18 to quickly extract air from the cavity, so that a local negative pressure environment is formed at the several air inlets 16 on the top, which achieves the effect of firmly pre-adsorbing the motor vehicle parts placed at the bottom onto the support surface and avoiding misalignment before clamping. It is disclosed here that the external exhaust device or air pump connected to the exhaust pipe 8 is a conventional negative pressure power component in the art, and its specific internal structure and control principle are prior art.

[0025] Please see Figure 6 As shown, each bottom support plate 7 has two symmetrically connected connecting pipes 21 that communicate with the interior of the cavity at one end. Adjacent connecting pipes 21 are connected to each other by a U-shaped connecting hose 19. The end of the connecting pipe 21 on one side is connected to a sealing cap 20. Specifically, by cooperating with the connecting pipes 21, U-shaped connecting hoses 19 and sealing caps 20, the internal cavities of multiple originally independent bottom support plates 7 can be connected in series. The sealing caps 20 are sealed on the connecting pipes 21 at the end of the pipes to ensure airtightness. This achieves the effect of full-surface synchronous negative pressure adsorption and simplifies the pipe connection structure by requiring only a single main pipe 18 to pump air.

[0026] Example 3 Please see Figure 4 and Figure 7 As shown, this embodiment of a welding device for processing motor vehicle parts includes a bidirectional movable structure comprising two rotating seats 23 respectively disposed on both sides between internal movable plates 3, and a center seat disposed at the center of the two rotating seats 23. A bidirectional lead screw 14 is rotatably connected inside the center seat. A drive motor 13 is mounted on one side of the welding frame 1. One end of the bidirectional lead screw 14 is rotatably connected to the inner wall of the welding frame 1, and the other end rotatably passes through the side wall of the welding frame 1 and is connected to the output shaft of the drive motor 13. Both rotating seats 23 are threadedly engaged with the bidirectional lead screw 14. Pins 2 are connected to both sides of the interior of the rotating seats 23. 4. A connecting rod 22 is rotatably connected. One end of the connecting rod 22 is rotatably connected to the adjacent internal moving plate 3 via a pin 24. Specifically, through the cooperation of the drive motor 13, the bidirectional lead screw 14, the center seat, the rotating seat 23, the pin 24, and the connecting rod 22, the drive motor 13 receives the control signal and drives the bidirectional lead screw 14 to rotate, so that the two rotating seats 23 connected by threads move synchronously in opposite directions on both sides of the center seat. The thrust is smoothly transmitted to the internal moving plate 3 through the connecting rod 22 and the pin 24, achieving the effect of driving the clamping mechanism on both sides to perform high-precision bidirectional synchronous translation.

[0027] Please see Figure 1 and Figure 8 As shown, a support plate 4 is bolted to the bottom of several movable columns 5. The support plate 4 is fixedly connected to the top of the internal movable plate 3. Several guide blocks 25 are fixedly connected to one side of the top of the support plate 4, which are arranged between several crossbars 2. Specifically, the support plate 4 is used to connect several movable columns 5 to the top of the internal movable plate 3. When the internal movable plate 3 moves horizontally, the support plate 4 can drive all the movable columns 5 arranged in the upper array to move synchronously in an integrated manner, thereby enhancing the motion synchronization and overall structural rigidity of the multi-point displacement mechanism.

[0028] Please see Figure 9 and Figure 10As shown, the flexible deformable clamping structure includes a push plate 6 located at the top of several crossbars 2 and connected to the moving column 5 via a mounting ring 30, and several elastic contact plates 28 arranged in a linear array on one side of the push plate 6. Each side of the elastic contact plate 28 is connected to a moving round rod 31, one end of which slides through the push plate 6. One end of the moving round rod 31 is connected to a limiting plate 33. A spring 32 is connected between the limiting plate 33 and the push plate 6. Specifically, through the coordinated arrangement of the push plate 6, mounting ring 30, elastic contact plate 28, moving round rod 31, limiting plate 33, and spring 32, when the clamping structure is pushed towards the center with the moving column 5 and contacts the accessory, the elastic contact plate 28 is squeezed by the outer wall of the accessory, causing the moving round rod 31 and the limiting plate 33 to slide backward against the restoring force of the spring 32. This achieves the effect that the entire clamping surface can adapt to the elastic deformation according to the surface undulations of the accessory and provide continuous buffer clamping force.

[0029] Please see Figure 9 and Figure 10 As shown, several dampers 34 are provided on both sides between each elastic contact plate 28 and the push plate 6. Several flexible contact protrusions 27 are fixedly connected to one side of the elastic contact plate 28. The push plate 6 and the mounting ring 30 are connected by a connecting bracket 29. Specifically, through the cooperation of the dampers 34, the flexible contact protrusions 27 and the connecting bracket 29, the dampers 34 can absorb the impact kinetic energy in time and play the role of energy absorption and shock absorption when the elastic contact plate 28 is deformed and displaced under force. At the same time, the flexible contact protrusions 27 directly adhere to the surface of the accessory, thereby reducing the instantaneous impact force of mechanical clamping on the accessory and increasing the friction of the contact surface to prevent damage to the surface of the accessory.

[0030] Please see Figure 5 and Figure 8 As shown, several guide rods 15 are fixedly connected to both sides of the inside of the welding frame 1. Several guide holes 26 that are adapted to the guide rods 15 are opened on the side wall of the internal moving plate 3. Specifically, through the cooperation between the guide rods 15 and the guide holes 26 opened on the internal moving plate 3, when the internal moving plate 3 is driven to slide laterally, the guide holes 26 slide smoothly along the outer wall of the guide rods 15 fixed inside the welding frame 1, which achieves the effect of accurately guiding the sliding trajectory of the internal moving plate and effectively preventing deviation or mechanical jamming during the movement.

[0031] This solution includes the following work process: Please see Figures 1 to 10As shown, when processing motor vehicle parts of different sizes and shapes, the operator first selects the appropriate number of metal bottom support plates 7 according to the specific geometric features and size specifications of the parts. These plates are then sequentially engaged with the horizontal bar 2 at the top of the welding frame 1 via their semi-circular support seats 17. At this time, adjacent bottom support plates 7 attract each other through magnetic plates 9 fixed on both sides, achieving a tight, seamless assembly. The motor vehicle parts to be processed are then placed stably on the bottom support structure composed of several bottom support plates 7. The external negative pressure exhaust system is activated, and the exhaust pipe 8 and main pipe 18 are used to ventilate the parts. The internal cavity of one of the bottom support plates 7 is evacuated. Since all the bottom support plates 7 are connected in series by a connecting pipe 21 and a U-shaped connecting hose 19, and the ends are sealed by a sealing cap 20, negative pressure is simultaneously formed inside all the spliced ​​cavities, causing the air inlet 16 at the top to generate negative pressure suction, which firmly pre-adsorbs and fixes the motor vehicle parts to the support surface. Then, the drive motor 13 is started to drive the bidirectional lead screw 14 to rotate. The two rotating seats 23, which are threaded with the bidirectional lead screw 14, move towards each other on both sides of the central seat. Through the pin 24 and the connecting rod 22, the internal moving plates 3 on both sides are pushed to start moving along the phase. Sliding in the correct direction, during this process, the guide hole 26 of the internal moving plate 3 slides smoothly along the guide rods 15 fixed on both sides inside the welding frame 1. The internal moving plate 3 drives several moving columns 5 to move synchronously towards the central accessory in the gap between several crossbars 2 through the top support plate 4. The mounting ring 30 connected to the moving column 5 drives the push plate 6 and the linear array of elastic contact plates 28 on one side of the push plate 6 to move inward through the connecting bracket 29. When the flexible contact protrusion 27 on one side of the elastic contact plate 28 contacts the irregular outer wall of the accessory and is subjected to force, the elastic contact plate 28 is compressed to overcome the elastic force of the spring 32. The retraction of the rod to the rear causes the moving rod 31 to slide through the push plate 6 and move the limiting plate 33. At the same time, the damper 34 set between the elastic contact plate 28 and the push plate 6 plays a role in shock absorption and energy absorption. This allows the flexible and deformable clamping structure to adapt to the irregular external curved surface of the part and fit tightly, forming a stable wrap-around clamping limit for the part. Finally, by cooperating with the horizontal adjustment module 12 and the vertical lifting module 10 installed on one side of the top of the welding frame 1, the welding working parts are driven to perform multi-dimensional spatial position adjustment, thereby performing high-precision welding processing on the motor vehicle parts that are stabilized and multi-limited.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A welding apparatus for processing motor vehicle parts, characterized in that, include: Welding frame (1) and welding module (11). A vertical lifting module (10) is installed on the top side of the welding frame (1) via a horizontal adjustment module (12). The welding module (11) is installed at the lifting end of the vertical lifting module (10). Several crossbars (2) are detachably connected to the inner top of the welding frame (1). Internal moving plates (3) are slidably installed on both sides of the inner bottom of the welding frame (1). Several moving columns (5) are linearly arrayed on the top of the internal moving plates (3) between several crossbars (2). Two internal moving plates (3) are connected by a bidirectional synchronous moving structure. Each of the movable columns (5) is detachably connected to a flexible deformable clamping structure on one side. Several bottom support plates (7) are provided at the top center of the welding frame (1). The top of each of the several bottom support plates (7) is provided with an adsorption limiting structure, and the several bottom support plates (7) are interconnected through a connecting structure.

2. The welding apparatus for processing motor vehicle parts according to claim 1, characterized in that, Both sides of the bottom support plate (7) are fixedly connected with semi-circular support seats (17) that are adapted to the crossbar (2), and each semi-circular support seat (17) is adapted to and snapped into the adjacent crossbar (2).

3. The welding apparatus for processing motor vehicle parts according to claim 1, characterized in that, The bidirectional movable structure includes two rotating seats (23) respectively set on both sides between the internal moving plates (3) and a central seat set at the center of the two rotating seats (23). The central seat is rotatably connected to a bidirectional lead screw (14). A drive motor (13) is installed on one side of the welding frame (1). One end of the bidirectional lead screw (14) is rotatably connected to the inner wall of the welding frame (1), and the other end rotatably passes through the side wall of the welding frame (1) and is connected to the output shaft of the drive motor (13). Both rotating seats (23) are threadedly engaged with the bidirectional lead screw (14). Both sides of the interior of the rotating seats (23) are rotatably connected to connecting rods (22) through pins (24). One end of the connecting rod (22) is rotatably connected to the adjacent internal moving plate (3) through pins (24).

4. The welding apparatus for processing motor vehicle parts according to claim 2, characterized in that, Both sides of the bottom support plate (7) are fixedly connected to magnetic plates (9), and the bottom support plate (7) is made of metal.

5. The welding apparatus for processing motor vehicle parts according to claim 3, characterized in that, The bottom of several movable columns (5) are bolted together with a support plate (4), and the support plate (4) is fixedly connected to the top of the internal movable plate (3).

6. The welding apparatus for processing motor vehicle parts according to claim 5, characterized in that, The flexible deformable clamping structure includes a push plate (6) located at the top of several crossbars (2) and connected to a moving column (5) via a mounting ring (30) and several elastic contact plates (28) arranged in a linear array on one side of the push plate (6). Both sides of the elastic contact plate (28) are connected to a moving round rod (31) that slides through the push plate (6) at one end. One end of the moving round rod (31) is connected to a limiting plate (33). A spring (32) is connected between the limiting plate (33) and the push plate (6).

7. The welding apparatus for processing motor vehicle parts according to claim 6, characterized in that, Several dampers (34) are provided on both sides between each of the elastic contact plates (28) and the push plate (6). Several flexible contact protrusions (27) are fixedly connected to one side of the elastic contact plate (28). The push plate (6) and the mounting ring (30) are connected by a connecting bracket (29).

8. The welding apparatus for processing motor vehicle parts according to claim 7, characterized in that, The welding frame (1) has several guide rods (15) fixedly connected to both sides inside, and the side wall of the internal moving plate (3) has several guide holes (26) that are compatible with the guide rods (15).

9. A welding apparatus for processing motor vehicle parts according to claim 4, characterized in that, The adsorption limiting structure includes a cavity opened inside the bottom support plate (7) and several air inlets (16) opened on the top of the bottom support plate (7) and communicating with the cavity. One of the bottom support plates (7) is fixedly connected to a main pipe (18) communicating with the cavity at the center of one end. The welding frame (1) is provided with an exhaust pipe (8) that cooperates with the main pipe (18) on one side of the top.

10. A welding apparatus for processing motor vehicle parts according to claim 1, characterized in that, Each of the bottom support plates (7) is symmetrically connected to two connecting pipes (21) that communicate with the interior of the cavity. The two adjacent connecting pipes (21) are connected to each other by a U-shaped connecting hose (19). The end of the connecting pipe (21) on one side is connected to a sealing cap (20).

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