Automobile accessory welding device with clamping and overturning functions

Abstract

The application discloses a kind of automobile accessory welding devices with clamping overturning function, especially relate to the technical field of automobile accessory welding appliance, including welding box main body, positioning table is equipped with lifting deflection linkage assembly, one side positioning table is equipped with reverse cooling device of adaptation lifting deflection linkage assembly, reverse cooling device is equipped with adaptation clamping assembly;The application is realized by the cooperation between second servo motor, synchronous transmission structure and cam jacking structure, the lifting and deflection linkage of deflection frame;The application is realized by the intercoordination between third servo motor, reverse frame, rotary gas supply structure and adaptation clamping structure, the continuous reverse surface of automobile accessory is realized and protection gas is continuously conveyed;The application is realized by the cooperation between visual camera, first linear motor, second linear motor, third linear motor, first servo motor and laser welder, and the identification and welding of different positions, different trends and different inclination welds are realized.

Description

Technical Field

[0001] This invention relates to the field of automotive parts welding tools, and in particular to an automotive parts welding device with a clamping and flipping function. Background Technology

[0002] As the automotive manufacturing industry moves towards lightweighting, integration, and precision, the structures of body connectors, chassis brackets, battery brackets, and other automotive parts are becoming increasingly complex, leading to ever-increasing demands for weld strength, welding position accuracy, and consistency of welding on both sides. During the production of automotive parts, it is common to weld and fix two or more sheet metal, brackets, or irregularly shaped parts. Laser welding, with its advantages of a small heat-affected zone, high welding speed, and stable weld quality, has become a commonly used welding method in automotive parts processing. For automotive parts with welds on both the front and back sides, it is also necessary to clamp, position, and flip the parts during a single processing step so that the welding equipment can complete the welding operations on both sides of the automotive parts separately. Most existing automotive parts welding devices with clamping and flipping functions mainly consist of a welding box, a welding execution structure, a moving and positioning structure, a clamping structure, a flipping structure, a protective gas supply structure, and a control structure. The welding box forms a relatively enclosed processing area, reducing the outward diffusion of laser, welding fumes, and spatter. The welding execution structure typically uses a laser welder to weld the weld seams of the automotive parts. The moving and positioning structure moves the laser welder to the corresponding welding position via a linear module, slide, or robotic arm. The clamping structure positions and fixes the automotive parts using pressure blocks, clamps, or positioning pins to prevent movement during welding. The flipping structure generally consists of a flipping frame, a rotating shaft, and a rotary drive component. The rotary drive component rotates the flipping frame and the clamped automotive parts, ensuring the front or back of the parts face the laser welder. The protective gas supply structure delivers protective gas to the automotive parts and the area adjacent to the weld seam through a gas supply pipe, reducing contact between the welding area and air, and assisting in removing some residual heat after welding. Each structure is driven by the control structure according to a preset program, thereby completing the clamping, welding, flipping, and unloading of the automotive parts. While the aforementioned structure can meet the basic clamping, flipping, and double-sided welding requirements of automotive parts, the loading, lifting, deflection, flipping, and air supply structures of most existing equipment are usually independent, lacking a linkage mechanism that allows for continuous connection of these actions. This results in significant shortcomings in actual processing: Firstly, the rotation axis of the existing flipping frame is usually fixed at a high position, and the flipping frame is mostly kept horizontal during loading. Workers need to lift automotive parts of a certain weight above the flipping frame before positioning and clamping them, which not only increases the labor intensity of loading and unloading but also makes it inconvenient to operate the clamping positions on the inside of the flipping frame and the side furthest from the worker. Secondly, although some equipment has lifting and deflection structures, lifting and deflection are controlled by different drive components, increasing the number of drive components and the internal space occupied by the equipment. Furthermore, asynchronous lifting actions on both sides can easily cause the flipping frame to tilt or twist. When the distance between the transmission wheels changes with the lifting action, the transmission belt is also prone to loosening, slipping, or excessive tension, affecting the lifting and lowering of the flipping frame. The stability of positioning is a concern. On the other hand, after the front welding of automotive parts is completed, some equipment still requires manual unclamping, flipping, and reclamping. Repeated clamping can easily cause changes in the position of the automotive parts, resulting in deviations in the positioning reference between the front and back welds. Even with automatic flipping using a motor-driven flipping frame, the external air supply pipe connected to the flipping frame is prone to entanglement, twisting, or pulling as the flipping shaft rotates, leading to unstable protective gas delivery. In some cases, the air supply may even need to be stopped before flipping, making it difficult to maintain continuous gas protection during the flipping and back welding of automotive parts. At the same time, existing clamping structures mostly use rigid pressure blocks with fixed angles, which are difficult to fully conform to the inclined, curved, or irregular surfaces of automotive parts. When clamped, local stress concentration and surface indentations are easily formed. After the automotive parts undergo slight dimensional changes due to the welding heat, the clamping force may decrease, leading to loosening or displacement of the automotive parts during flipping or welding, affecting the positional accuracy and welding quality of the front and back welds. Therefore, improvements are needed to address these issues. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a welding device for automotive parts with clamping and flipping functions.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a welding device for automotive parts with clamping and flipping functions, comprising a welding box body, a welding chamber inside the welding box body, and first support frames vertically arranged on both sides of the bottom rear end of the welding chamber. Connecting frames are horizontally installed between the upper and lower parts of the first support frames. First linear motors are horizontally installed at the front ends of the two connecting frames. A first U-shaped frame is vertically installed between the output plates of the two first linear motors, and a second linear motor is vertically installed within the first U-shaped frame. A positioning frame is longitudinally installed on the output plate of the second linear motor, and a second U-shaped frame is longitudinally installed on the bottom surface of the positioning frame. A third linear motor is longitudinally mounted on the bottom surface of the second U-shaped frame. The third linear motor output plate has a connecting block fixedly connected to its bottom surface. One side of the connecting block has a mounting block, and a laser welder is mounted on the mounting block. The other side has a first servo motor. An extension plate is horizontally mounted on the other side of the top surface of the positioning frame. A vision camera is vertically mounted on the top surface of the extension end of the extension plate. A through hole, coaxial with the first servo motor, is opened in the middle of the connecting block. A spline countersunk hole is opened on the connecting block and the through hole. The output shaft of the first servo motor passes through the through hole, and a spline column adapted to the spline countersunk hole is fixedly connected to the extension end.

[0005] Preferably, positioning platforms are installed on both sides of the front end of the welding chamber. The positioning platforms have a hollow structure and a horizontally connected protective block is provided in the lower middle part. A collection trough for collecting waste chips is installed on the bottom surface of the welding chamber below the protective block. An air supply pump is installed on the bottom surface of the welding chamber on one side of the positioning platform. A lifting and deflection linkage component for convenient material handling is installed between the two positioning platforms. A reversing cooling device adapted to the lifting and deflection linkage component and driving the subsequent welding objects to reverse is installed in the positioning platform on one side. An adapted clamping component is installed in the reversing cooling device.

[0006] Preferably, the lifting and deflection linkage assembly includes a rotating rod arranged laterally inside the protective block, and the two ends of the rotating rod are respectively rotatably connected to the inner cavity walls of two positioning platforms. The two ends of the rotating rod are respectively fixedly connected to cams placed in the inner cavity of the corresponding positioning platform. A fixing plate is provided above the cam. The front and rear ends of the fixing plate are fixed to the inner cavity walls of the positioning platform. A lifting platform is provided above the fixing plate. A support platform is fixedly connected to the top surface of the lifting platform. Positioning columns are arranged laterally at the four corners of the far ends of the two support platforms. Positioning plates are fixedly connected to the extension ends of multiple positioning columns on one side.

[0007] Preferably, guide rails are vertically installed on both sides of the front and rear end faces of the positioning platform cavity, and multiple guide rails on the same side are slidably connected to guide platforms, and the extension ends of multiple guide platforms are connected to the bottom surface of the lifting platform. A first sliding hole is opened in the middle of the fixed plate, and a first lifting rod with a T-shaped structure is slidably connected to the first sliding hole. A U-shaped block is fixedly connected to the extension end of the first lifting rod, and the bottom surface of the horizontal end abuts against the top surface of the fixed plate, and the top surface of the first lifting rod abuts against the bottom surface of the lifting platform. A rotating wheel is rotatably connected to the inner side of the U-shaped block, and the other end of the rotating wheel abuts against the end face of the cam.

[0008] Preferably, a first damping spring is sleeved on the outer side of the first lifting rod, and the two ends of the first damping spring abut against the bottom surface of the fixed plate and the top surface of the U-shaped block, respectively.

[0009] Preferably, a second servo motor and a third servo motor are respectively provided at the far ends of the two positioning plates, and the output shafts of the second servo motor and the third servo motor both pass through the positioning plates. A rotating hole adapted to the passage of the output shaft of the second servo motor is opened in the middle of the support platform. The axis of the rotating hole and the axis of the rotating rod are flush with the vertical end face. A waist hole with the same diameter as the rotating hole is vertically opened above the near ends of the two positioning platforms. The output shaft of the second servo motor passes through the rotating hole and the waist hole and is placed on the positioning platform on the other side. A positioning cylinder passing through the rotating hole and the waist hole is fixed to the other side of one of the positioning plates. The output shaft of the third servo motor passes through one of the positioning plates and is placed inside the positioning cylinder. Two positioning bearings are sleeved on the outside of the output shaft of the third servo motor. The outside of the positioning bearings is fixed to the inner wall of the positioning cylinder.

[0010] Preferably, a first sealed bearing is sleeved on the outer side of both the second servo motor and the positioning cylinder. A pressing block with an inverted triangular structure is sleeved on the outer side of the first sealed bearing and fixed to the end face of the positioning plate. A first synchronous wheel is provided at the near end of each of the two first sealed bearings and is respectively fixed to the output shaft of the second servo motor and the outer side of the positioning cylinder. A second synchronous wheel is provided at the rear end below the first synchronous wheel. A second sealed bearing is installed on the inner side of the second synchronous wheel. A positioning rod is fixed on the inner side of the second sealed bearing. A limiting groove for limiting the longitudinal sliding of the positioning rod is opened on the inner wall of the positioning platform. A return spring is provided in the limiting groove. The two ends of the return spring are respectively fixed to one end face of the positioning rod and the inner side wall of the limiting groove. A rubber wheel is rotatably connected to the outer side of the positioning rod. The inclined end of the pressing block abuts against the outer side of the rubber wheel. A third synchronous wheel placed in the inner cavity of the corresponding positioning platform is fixed on the outer side of both ends of the rotating rod. The first, second, and third synchronous wheels on one side are all in the same vertical plane and are sleeved with a synchronous belt.

[0011] Preferably, the output shaft extension end of the second servo motor is fixedly connected to a deflection frame placed between two positioning platforms. The deflection frame has a sealed hollow structure, and the other end of the deflection frame is connected and fixedly connected to the extension end of the positioning cylinder.

[0012] Preferably, the reverse cooling device includes an air supply column connected to the end of the output shaft of a third servo motor via a coupling. The extended end of the air supply column has a countersunk hole, and multiple air supply grooves with connecting countersunk holes are equidistantly provided on the outer side. Both sides of the air supply groove are provided with third sealed bearings sleeved on the outer side of the air supply column. The outer side of the two third sealed bearings is fitted with a fixedly installed positioning sleeve. One side of the positioning sleeve is provided with a rigid first air supply pipe. The other end of the first air supply pipe is connected to the deflection frame, and the other end of the first air supply pipe is sleeved with a flexible second air supply pipe. The other end of the second air supply pipe is connected to the air supply pump platform.

[0013] Preferably, the inner side of the deflection frame is provided with a rotatable reversing frame, the reversing frame is a sealed cavity structure, the other end of the air supply column passes through the inner side of the deflection frame and is fixedly connected to the reversing frame, and the reversing frame is connected with an air supply hole adapted to the countersunk hole, and a rotating column is fixedly connected to the middle of the other end of the reversing frame, the other end of the rotating column is rotatably connected to the inner side of the deflection frame, and multiple air supply slots are equidistantly connected in the transverse section of the reversing frame, and each of the multiple air supply slots is provided with a filter screen fixedly connected to the inner side of the reversing frame in the same proportion.

[0014] Preferably, the adapter clamping assembly includes a plurality of manual clamps equidistantly mounted on the top and bottom surfaces of the reversing frame. The extension section of each manual clamp is vertically provided with a second sliding hole, and a second lifting rod with a T-shaped structure is slidably connected to the second sliding hole. The bottom surface of the lateral end of the second lifting rod abuts against the top surface of the extension end of the manual clamp, and an abutment plate is fixedly connected to the outer side of the extension end of the second lifting rod. A second damping spring is sleeved on the outer side of the second lifting rod. The two ends of the second damping spring abut against the top surface of the abutment plate and the bottom surface of the extension end of the manual clamp, respectively. A ball joint is installed on the extension end of the second lifting rod, and a rubber platform is ball-jointed at the other end of the ball joint.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves the linkage of lifting and deflection of the deflection frame through the cooperation of the second servo motor, synchronous transmission structure, and cam lifting structure. It not only ensures the cam is at its lowest peak during the loading stage, allowing the deflection frame and reversing frame to descend to the lowest position of the waist hole and tilt together towards the sealed hinged door, reducing the loading and unloading height of automotive parts and facilitating manual clamping for loading and clamping, but also enables the second servo motor to simultaneously drive the deflection frame to deflect and the support platform to rise during the welding stage, keeping the deflection frame horizontal when it reaches the high position, reducing the need for independent lifting drive structures. During the lifting and deflection stage, the second servo motor drives the rotating rod and the cams at both ends to rotate synchronously via the first synchronous pulley, synchronous belt, and third synchronous pulley. The cams are connected by the rotating pulley and the first lifting structure. The lifting rod pushes the lifting platform, support platform, and positioning plate to rise smoothly, so that both ends of the deflection frame rise synchronously, preventing the possibility of twisting due to asynchronous lifting at both ends. When the extrusion block rises and falls with the positioning plate, it converts the vertical displacement into the longitudinal compensation displacement of the positioning rod through its inclined surface and the cooperation of the rubber wheel. Under the push of the return spring, it drives the second synchronous wheel to automatically change the tension position, compensating for the changes in the tension of the synchronous belt caused by the change in the distance between the first and third synchronous wheels, and avoiding the synchronous belt from loosening, slipping, or being overstretched. The guide table and guide rail cooperate to limit the lateral swing of the lifting platform. The first damping spring causes the rotating wheel to continuously fit the cam and buffer the impact caused by the change in the cam profile, thereby meeting the needs of convenient loading and unloading, smooth lifting and lowering, and horizontal positioning in the welding process of automotive parts.

[0016] 2. This invention achieves continuous flipping welding of automotive parts on both sides and continuous supply of protective gas through the cooperation of a third servo motor, a reversing frame, a rotating air supply structure, and an adaptive clamping structure. During the lifting and deflection of the deflecting frame, the third servo motor drives the reversing frame to rotate synchronously according to the rotation angle of the second servo motor, keeping the reversing frame and the deflecting frame coplanar and preventing the automotive parts from flipping prematurely before reaching the welding position. After the front welding of the automotive parts is completed, the second servo motor keeps the deflecting frame in a high horizontal position, while the third servo motor independently drives the air supply column and the reversing frame to rotate 180°, so that the back of the automotive parts faces the laser welder. This eliminates the need to disassemble the automotive parts and perform secondary clamping, shortening the conversion time for double-sided welding and reducing positional changes caused by repeated positioning. The positioning sleeve, the air supply column, and the two third sealed bearings together form an annular air supply chamber, ensuring that the protective gas output by the air supply pump can... The airflow passes sequentially through the second air supply pipe, the first air supply pipe, the annular air supply chamber, the air supply groove on the air supply column, and the countersunk hole into the sealed cavity of the reversing frame. The air is then dispersed and discharged through multiple air supply grooves. As the air supply column rotates with the reversing frame, the external air supply pipe does not need to rotate synchronously, preventing entanglement, twisting, and interruption of the air supply. The filter screen disperses the airflow and prevents welding debris from entering the reversing frame in the opposite direction, ensuring a stable supply of protective gas to the back of the automotive parts and the area adjacent to the weld. It also helps to remove residual heat after welding. Multiple manual clamps, in conjunction with the second lifting rod, ball joint, rubber platform, and second damping spring, can adaptively fit according to the tilt angle of the local surface of the automotive parts. This buffers clamping impact and reduces surface indentations while maintaining elastic compression, preventing the automotive parts from loosening or shifting during flipping and welding. This improves the consistency of welding on both sides of the automotive parts and the reliability of the protective gas supply.

[0017] 3. This invention utilizes the coordination of a vision camera, a first linear motor, a second linear motor, a third linear motor, a first servo motor, and a laser welder to achieve the identification and welding of welds at different positions, directions, and angles. The vision camera captures the position of the automotive parts and welds. The three linear motors drive the laser welder to move laterally, vertically, and longitudinally, respectively. The first servo motor, through spline columns and countersunk holes, adjusts the irradiation orientation of the laser welder, enabling it to move along the identified weld path and adapt to the welding requirements of different specifications of automotive parts. The welding box body and the sealed hinged door form a relatively enclosed welding space, reducing the outward diffusion of laser, welding fumes, and spatter. A protective block separates the welding area from the synchronous transmission and cam lifting structure. A collection trough collects falling welding debris, reducing the impact of debris entering the positioning table. The system offers several advantages: Firstly, it ensures stable transmission. Secondly, the synchronous transmission structure, cam lifting structure, and tensioning structure are centrally located within the cavities of the two positioning platforms, eliminating the need for separate lifting drive devices and reducing internal space requirements and the number of drive components. Thirdly, the cams on both sides rotate coaxially and in phase via the same rotating rod. Each drive structure, air supply structure, and clamping structure is relatively independent. The manual clamps can be replaced according to the size and clamping position of the automotive parts, facilitating subsequent maintenance, cleaning, and replacement of easily damaged parts. Fourthly, the control box sequentially controls the movement, deflection, lifting, reversal, welding, and air supply actions, enabling the device to continuously complete the processes of loading, clamping, lifting and deflection, front welding, reversal, back welding, delayed air supply, reset, and unloading. This improves the efficiency of double-sided welding of automotive parts while reducing the labor intensity and production costs associated with manual flipping and repeated clamping. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure and installation of the present invention; Figure 2 This is a schematic diagram of the visual camera position structure of the present invention; Figure 3 This is a partial structural cross-sectional view of the present invention; Figure 4 This is a partial cross-sectional view of the structure of the present invention; Figure 5 This is a schematic diagram of the initial feeding structure of the reversing frame and deflecting frame of the present invention; Figure 6 This is a schematic diagram of the position structure of the second servo motor of the present invention; Figure 7 This is a schematic diagram showing the position and structure of the manual clamp and filter screen of the present invention; Figure 8 This is a schematic diagram of the extrusion block and rubber wheel structure of the present invention; Figure 9 This is a schematic diagram illustrating the structural principle and motion of the first synchronous wheel, second synchronous wheel, third synchronous wheel, and extrusion block of the present invention. Figure 10 For the present invention Figure 3 Enlarged diagram of part A in the middle; Figure 11 For the present invention Figure 6 Enlarged diagram of section B; Figure 12 For the present invention Figure 7 Enlarged diagram of section C.

[0019] In the diagram, the components are numbered as follows: 1. Welding box body; 2. First support frame; 3. First linear motor; 4. Second linear motor; 5. Third linear motor; 6. Connecting block; 7. Laser welder; 8. Vision camera; 9. First servo motor; 10. Positioning stage; 11. Collection tank; 12. Air pump; 13. Rotating rod; 14. Cam; 15. Fixing plate; 16. Support platform; 17. Guide rail; 18. First lifting rod; 19. Rotating wheel; 20. First damping. 21. Spring; 22. Positioning plate; 23. Second servo motor; 24. Positioning cylinder; 25. First synchronous pulley; 26. Extrusion block; 27. Second synchronous pulley; 28. Rubber wheel; 29. ​​Third synchronous pulley; 30. Synchronous belt; 31. Deflection frame; 32. Third servo motor; 33. Air supply column; 34. Positioning sleeve; 35. Reversing frame; 36. Filter screen; 37. Manual clamp; 38. Second lifting rod; 39. Rubber platform; 30. Second damping spring. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1: See Figures 1 to 12The present invention discloses a welding device for automotive parts with clamping and flipping functions, comprising a welding box body 1 for supporting and enclosing the entire welding structure, wherein a welding chamber is formed inside, providing a relatively enclosed welding space for the laser welder 7, the deflection frame 30, and the reversing frame 34; sealed hinged doors on both sides of the front end of the welding chamber open during loading and unloading and close during welding to reduce the outward diffusion of laser, welding fumes, and spatter; a control box externally disposed on the welding box body 1 is connected to the first linear motor 3, the second linear motor 4, the third linear motor 5, the first servo motor 9, the second servo motor 22, the third servo motor 31, the laser welder 7, and the vision camera 8. The air supply pump 12 is electrically connected to issue movement, deflection, lifting, reversing, welding, and air supply commands in a preset sequence, so that each part cooperates with each other within the same processing cycle. The two first support frames 2 and the connecting frame installed between the two first support frames 2 together form the load-bearing skeleton of the welding execution structure. The two first linear motors 3 drive the first U-shaped frame to move laterally along the welding chamber. The second linear motor 4 inside the first U-shaped frame drives the positioning frame to move vertically. The third linear motor 5 on the second U-shaped frame below the positioning frame drives the connecting block 6 to move longitudinally, thereby forming three intersecting linear motion directions. The vision camera 8, the first linear motor 3, and the second linear motor... Linear motors 4 and 5 are each connected to a separate control system. The system uses a vision camera 8 to establish pixel coordinate and device coordinate mapping, extract the weld centerline, generate discrete trajectory points, and convert the signals into position commands for the first linear motor 3, the second linear motor 4, and the third linear motor 5. The vision camera 8 is mounted on the positioning frame via an extension plate and moves with the positioning frame to acquire the position of the automotive parts to be welded and the weld. The control box coordinates the operation of the three linear motors based on the image information acquired by the vision camera 8, moving the laser welder 7 above the weld. One side of the connecting block 6 has a mounting block for installing the laser welder 7, and the other side has the first servo motor... The first servo motor 9 has a splined column on its output shaft that engages with a countersunk spline hole in the mounting block, enabling the first servo motor 9 to drive the laser welder 7 to adjust the irradiation position, thereby adapting to welds with different orientations or angles. The two positioning platforms 10 provide support space for both ends of the deflection frame 30. The cavity of the positioning platform 10 is used to accommodate synchronous transmission, cam lifting, and tensioning components. The protective block between the two positioning platforms 10 is used to separate the internal transmission components from the welding area above. The collection groove 11 is located below the protective block and is used to collect welding debris falling from the sides or gaps of the protective block, reducing the amount of debris entering the positioning platform 10 and affecting the synchronous transmission and cam rotation.The gas supply pump 12 is installed on the bottom surface of the welding chamber and connected to an external shielding gas device. Under the control of the control box, the gas supply pump 12 delivers shielding gas into the reversing frame 34, causing the shielding gas to be dispersed and discharged from multiple gas supply slots on the reversing frame 34 toward the end face of the automotive part to be welded. This provides gas protection for the back of the automotive part to be welded and the area adjacent to the weld, and also helps to remove the residual heat generated after welding.

[0022] Example 2: The technical solution is basically the same as that of Example 1, except that, as Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12As shown, the rotating rod 13 is horizontally arranged inside the protective block, and its two ends are rotatably connected to the inner cavity walls of the two positioning platforms 10, so that the cams 14 at both ends of the rotating rod 13 can rotate coaxially and in the same phase; the fixing plate 15 is fixed inside the positioning platform 10 and provides a vertical sliding reference for the first lifting rod 18. The U-shaped block at the lower end of the first lifting rod 18 is used to install the rotating wheel 19. The rotating wheel 19 rolls against the outer circumference of the cam 14, thereby converting the rotation of the cam 14 into the vertical movement of the first lifting rod 18 and reducing the friction between the cam 14 and the first lifting rod 18; the first lifting rod 18 pushes the lifting platform and the support platform 16 to rise, and the multiple guide platforms connected to the lifting platform slide synchronously along the corresponding guide rails 17 to limit the lateral swing of the lifting platform. To ensure the smooth lifting and lowering of the two support platforms 16, the positioning columns on the outer side of the support platform 16 transmit the lifting displacement to the positioning plate 21, so that the second servo motor 22, the third servo motor 31, the positioning cylinder 23, the deflection frame 30, and the reversing frame 34 lift and lower synchronously with the support platform 16; the first damping spring 20 is set between the fixed plate 15 and the U-shaped block to make the rotating wheel 19 continuously abut against the cam 14, and absorb the impact when the profile of the cam 14 changes, reducing the vibration during the lifting and lowering of the support platform 16; the cam 14 has a lowest peak closest to the axis of the rotating rod 13 and a highest peak farthest from the axis of the rotating rod 13; in the initial feeding state, the cam 14 is at the lowest peak, and the first lifting rod 18, the lifting platform, the support platform 16, and the positioning plate 21 are all in position. At the low position, the output shaft of the second servo motor 22 and the positioning cylinder 23 are at the lowest point of the corresponding waist hole; the control box simultaneously keeps the second servo motor 22 and the third servo motor 31 at a preset initial angle, so that the deflection frame 30 and the reversing frame 34 are coplanar and tilt together toward the sealed hinged door, thereby bringing the reversing frame 34 closer to the worker's side, making it easier for the worker to place the automotive parts to be welded from the front of the equipment, and to complete the clamping operation with the manual clamp 36. After the loading is completed and the sealed hinged door is closed, the second servo motor 22 rotates at a preset angle, on the one hand directly driving the deflection frame 30 to deflect from the inclined loading position to the horizontal welding position, and on the other hand driving the first synchronous wheel 24 fixed to its output shaft to rotate; the first synchronous wheel 24 Power is transmitted through the synchronous belt 29. After being guided and tensioned by the second synchronous pulley 26, the synchronous belt 29 drives the third synchronous pulley 28 to rotate. The third synchronous pulley 28 drives the rotating rod 13 and the cams 14 at both ends of the rotating rod 13 to rotate synchronously. As the cam 14 turns from the lowest peak to the highest peak, the rotating wheel 19, the first lifting rod 18, the lifting platform and the support platform 16 rise in sequence, so that the deflection frame 30 moves upward along the waist hole while deflecting. During assembly, the transmission ratio between the first synchronous pulley 24 and the third synchronous pulley 28 is set according to the initial tilt angle of the deflection frame 30, and the circumferential installation phase of the cam 14 relative to the third synchronous pulley 28 is set so that when the cam 14 rotates to the highest peak, the deflection frame 30 just reaches the high-level horizontal welding position.Subsequently, the second servo motor 22 stops rotating and maintains the position of the output shaft, keeping the cam 14, support platform 16, and deflection frame 30 in the corresponding high-level horizontal state; during the lifting and lowering of the support platform 16, the first synchronous wheel 24 undergoes vertical displacement with the positioning plate 21, while the axial position of the third synchronous wheel 28 is limited by the rotating rod 13, thus the distance between the first synchronous wheel 24 and the third synchronous wheel 28 changes; the extrusion block 25 rises and falls synchronously with the positioning plate 21, the inclined surface of the extrusion block 25 rolls against the rubber wheel 27, and the return spring in the limiting groove continuously pushes the positioning rod, so that the rubber wheel 27 always fits against the inclined surface of the extrusion block 25; The vertical movement of the pressure block 25 is converted into longitudinal compensating movement of the positioning rod along the limiting groove through the inclined surface. Simultaneously, the positioning rod drives the second synchronous pulley 26 to change its tension position, thereby compensating for the tension changes in the synchronous belt 29 caused by the lifting and lowering of the first synchronous pulley 24, ensuring that the synchronous belt 29 maintains a suitable tension throughout the entire lifting and deflection process. The rubber wheel 27 is used to reduce friction and impact between the pressure block 25 and the positioning rod, and the second sealed bearing is used to allow the second synchronous pulley 26 to rotate smoothly relative to the positioning rod. The synchronous transmission structures on both sides maintain synchronous movement through the same rotating rod 13, thereby reducing the possibility of misalignment caused by asynchronous lifting and lowering at both ends of the deflection frame 30.

[0023] Example 3: The technical solution is basically the same as that of Example 1, except that, as Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12As shown, when the second servo motor 22 drives the deflection frame 30 to rise and turn to a horizontal position, the control box simultaneously sends a follow-up command to the third servo motor 31 that matches the deflection angle of the deflection frame 30. The third servo motor 31 drives the reversing frame 34 to rotate synchronously through the coupling and the air supply column 32, so that the reversing frame 34 always maintains a preset coplanar relationship with the deflection frame 30 during the entire lifting and deflection process, preventing the automotive parts to be welded from flipping relative to the deflection frame 30 before reaching the welding position. The output shaft of the third servo motor 31 is rotatably supported by the positioning bearing in the positioning cylinder 23. The rotating column on the other side of the reversing frame 34 is rotatably connected to the deflection frame 30, so that both ends of the reversing frame 34 are rotatably supported, improving the stability of the reversing frame 34 when it flips. The second servo motor The output shaft of 22 and the positioning cylinder 23 can move up and down along the corresponding waist hole. The waist hole provides space for the deflection frame 30 to move vertically and rotate simultaneously. The positioning sleeve 33 is fixed on the side of the deflection frame 30 near the positioning cylinder 23. Two third sealing bearings are sleeved on the outside of the air supply column 32 and located on both sides of the air supply groove of the air supply column 32. The two third sealing bearings are used to support the rotation of the air supply column 32 relative to the positioning sleeve 33 and to seal the air supply area between the positioning sleeve 33 and the air supply column 32. The outer side of the air supply column 32 has threads with opposite threads at both ends relative to the positioning sleeve 33. The distal ends of the two third sealing bearings are respectively matched with the threads of the air supply column 32, as well as the existing rotary joint and annular sealing ring to seal the distal ends of the two third sealing bearings. The sealing mechanism ensures that the protective gas entering the air supply column 32 will not leak due to its own clearance during the rotation of the third sealing bearing. The inner wall of the positioning sleeve 33, the outer wall of the air supply column 32, and the space between the two third sealing bearings form an annular air supply cavity. One end of the rigid first air supply pipe is connected to the annular air supply cavity, and the other end is connected to the flexible second air supply pipe, which is connected to the air supply end of the air supply pump 12. The protective gas output by the air supply pump 12 passes sequentially through the second air supply pipe, the first air supply pipe, the annular air supply cavity, the air supply groove on the outside of the air supply column 32, the countersunk hole inside the air supply column 32, and the air supply hole on the reversing frame 34 into the sealed cavity of the reversing frame 34, and is then dispersed and discharged through multiple air supply grooves on the transverse section of the reversing frame 34. The flexible second air supply pipe is used to adapt to the deflection frame. The lifting and limited angle deflection of the 30; when the air supply column 32 rotates relative to the positioning sleeve 33, the air supply groove on the outside of the air supply column 32 remains connected to the annular air supply chamber. Therefore, when the third servo motor 31 drives the reversing frame 34 to rotate, it is not necessary to drive the external air supply pipe to rotate with the air supply column 32, which can avoid the air supply pipe from getting tangled and ensure that the protective gas continuously enters the reversing frame 34; the filter screen 35 is correspondingly set inside the multiple air supply grooves, which is used to disperse the airflow and to block welding debris from entering the sealed cavity of the reversing frame 34 from the air supply groove in the opposite direction; multiple manual clamps 36 are respectively set on the top and bottom surfaces of the reversing frame 34, and the operator can select the corresponding manual clamp 36 to clamp according to the outline of the automotive parts to be welded, the weld position and the clearance space after the reversing.When the manual clamp 36 is operated, its extended end pushes the second lifting rod 37 towards the automotive part to be welded. The second lifting rod 37 drives the ball joint and rubber platform 38 to abut against the surface of the automotive part to be welded. The ball joint allows the rubber platform 38 to adaptively swing according to the tilt angle of the local surface of the automotive part to be welded, so that the rubber platform 38 is fully in contact with the automotive part to be welded. The rubber platform 38 is used to increase the friction at the clamping position and reduce the surface indentation caused by rigid clamping. The second damping spring 39 is located outside the second lifting rod 37 and between the abutment plate and the extended end of the manual clamp 36. It buffers the instantaneous pressure applied by the manual clamp 36 during the clamping process, and maintains stability when the automotive part to be welded undergoes slight dimensional changes due to welding heat. For elastic clamping, the model of the second damping spring 39 should be selected within the specified range through multiple experiments to ensure that the second damping spring 39 supporting the bottom surface of the welded part will not be significantly compressed during and after the reversing frame 34 is reversed. The second damping spring 39 pressing the top surface of the welded part will not cause insecure positioning of the welded part due to significant compression of the lower second damping spring 39. The manual clamp 36 can be replaced according to the size and clamping position of the automotive part to be welded, but its clamping end transmits clamping force to the automotive part to be welded through the second lifting rod 37, the second damping spring 39, the ball joint, and the rubber platform 38. When the deflection frame 30 and the reversing frame 34 reach the high horizontal position, the vision camera 8 captures the automotive part... At the location of the weld seam on the front of the component, the first linear motor 3, the second linear motor 4, and the third linear motor 5 work together to move the laser welder 7 to the weld seam position, and the first servo motor 9 adjusts the irradiation direction of the laser welder 7 to complete the welding of the front of the automotive component. After the welding of the front of the automotive component is completed, the three linear motors first move the laser welder 7 to the flipping avoidance area of ​​the reversing frame 34, the second servo motor 22 keeps the deflection frame 30 in a high horizontal position, and the third servo motor 31 then drives the air supply column 32 and the reversing frame 34 to rotate 180° relative to the deflection frame 30, thereby flipping the back of the automotive component to the side facing the laser welder 7. During the reversal process, the manual clamp 36 continuously clamps the automotive component, circumferentially... The air supply chamber and the air supply groove outside the air supply column 32 are continuously connected to ensure that the protective gas is not interrupted by the rotation of the reversing frame 34. After the vision camera 8 re-identifies the position of the weld seam on the back of the automotive part, the three linear motors and the first servo motor 9 cooperate again to drive the laser welder 7 to complete the welding of the back of the automotive part. After the welding of the back of the automotive part is completed, the laser welder 7 stops working, and the air supply pump 12 continues to deliver protective gas according to the preset time to provide delayed gas protection for the welded automotive part and help remove residual heat. Then the third servo motor 31 drives the reversing frame 34 to return to the reset angle coplanar with the deflection frame 30, and the second servo motor 22 rotates in the opposite direction, so that the deflection frame 30 tilts from the horizontal welding position toward the direction of the sealed hinged door.Simultaneously, the second servo motor 22 drives the rotating rod 13 to rotate in the opposite direction via the first synchronous pulley 24, the synchronous belt 29, and the third synchronous pulley 28, causing the cam 14 to return from its highest peak to its lowest peak. The support platform 16, with the cooperation of the cam 14, the rotating pulley 19, and the first damping spring 20, smoothly descends to the loading low position. The operator opens the sealed hinged door, releases the manual clamp 36, and removes the double-sided welded automotive parts, thus completing a complete cycle of loading, clamping, lifting and deflection, front welding, reversing, back welding, resetting, and unloading.

[0024] Working principle: In this embodiment, the present invention also proposes a method for using an automotive parts welding device with clamping and flipping function, including the following steps: Step 1: Connect the equipment to an external power source and connect the air pump 12 to the external protective gas device. Start the equipment through the control box and execute the zero-return procedure, causing the first linear motor 3, the second linear motor 4, the third linear motor 5, the first servo motor 9, the second servo motor 22, and the third servo motor 31 to return to their initial positions. At this time, the second servo motor 22 drives the rotating rod 13 to rotate to the preset initial angle through the first synchronous pulley 24, the synchronous belt 29, and the third synchronous pulley 28, so that the cams 14 at both ends of the rotating rod 13 are at their lowest peaks. The first lifting rod 18, the support platform 16, and the positioning plate 21 descend to their low positions. The output shaft of the second servo motor 22 and the positioning cylinder 2... 3 is at the lowest point of the corresponding waist hole; at the same time, the second servo motor 22 causes the deflection frame 30 to tilt toward the sealed hinge door, and the third servo motor 31 drives the reversing frame 34 to maintain a coplanar tilting state with the deflection frame 30. The operator opens the sealed hinge door, places the automotive parts to be welded in the reversing frame 34, and selects the corresponding manual clamp 36 according to the contour of the automotive parts to clamp them. When the manual clamp 36 closes, it pushes the second lifting rod 37 to move toward the automotive parts, so that the rubber platform 38 swings adaptively according to the surface angle of the automotive parts under the action of the ball joint platform and fits with the automotive parts. The second damping spring 39 is compressed and generates elastic reaction force, thereby buffering and pressing the automotive parts. Step 2, Lifting and Deflection Linkage and Horizontal Positioning: After clamping is completed, the sealed hinged door is closed. The second servo motor 22 is started through the control box. The second servo motor 22 directly drives the deflection frame 30 to rotate from the inclined feeding position to the horizontal welding position. On the other hand, it drives the first synchronous pulley 24, which is fixed to its output shaft, to rotate. The first synchronous pulley 24 transmits power through the synchronous belt 29. After being guided and tensioned by the second synchronous pulley 26, the synchronous belt 29 drives the third synchronous pulley 28 to rotate. The third synchronous pulley 28 further drives the rotating rod 13 and the cams 14 at both ends to rotate synchronously. When the cam 14 gradually turns from the lowest peak to the highest peak, the cam 14 pushes the first lifting rod 18 to move upward through the rotating wheel 19. The first lifting rod 18 pushes the lifting platform and the support platform 16 to rise in sequence. The guide platform connected to the lifting platform slides along the guide rail 17, so that the two support platforms 16 on both sides rise steadily and synchronously. The support platform 16 drives the positioning plate 21 to rise through the positioning column, so that the second servo motor 22, the third servo motor 31, the positioning cylinder 23, the deflection frame 30 and the reversing frame 34 move along the corresponding... The waist hole moves upward synchronously. During the rise of the positioning plate 21, the extrusion block 25 moves upward synchronously with the positioning plate 21. The reset spring in the limiting groove pushes the positioning rod, so that the rubber wheel 27 always fits the inclined surface of the extrusion block 25. The vertical movement of the extrusion block 25 is converted into the longitudinal compensation movement of the positioning rod through the inclined surface, so that the positioning rod drives the second synchronous wheel 26 to change the tension position, thereby compensating for the change in tension of the synchronous belt 29 caused by the change in distance between the first synchronous wheel 24 and the third synchronous wheel 28. When the cam 14 rotates to the highest peak, the support platform 16 reaches the highest position, and the deflection frame 30 rotates synchronously to the horizontal welding position. The second servo motor 22 stops rotating and maintains the deflection frame 30 in a horizontal state through the position holding function. While the second servo motor 22 drives the deflection frame 30 to rise and deflect, the control box controls the third servo motor 31 to rotate synchronously according to the rotation angle of the second servo motor 22, so that the reversing frame 34 deflects together with the deflection frame 30 and always remains coplanar, avoiding the automotive parts from flipping relative to the deflection frame 30 before reaching the horizontal welding position. Step 3, Protective Gas Delivery and Front Welding of Automotive Parts: After the deflector 30 and the reversing frame 34 reach the high horizontal position, the control box starts the air supply pump 12. The protective gas enters the annular air supply chamber inside the positioning sleeve 33 through the flexible second air supply pipe and the rigid first air supply pipe, then enters the countersunk hole inside the air supply column 32 through the air supply groove on the outside of the air supply column 32, and enters the sealed cavity of the reversing frame 34 through the air supply hole on the reversing frame 34. Finally, it is dispersed and discharged through multiple air supply grooves on the transverse section of the reversing frame 34. The filter screen 35 disperses the discharged protective gas and prevents welding debris from entering the reversing frame 34 from the air supply groove in the opposite direction, so that the protective gas can be stably delivered to the back of the automotive parts and the area adjacent to the weld. Then, the vision camera 8 captures the front of the automotive parts and the front side of the weld. The control box controls the first linear motor 3 to move the laser welder 7 laterally, the second linear motor 4 to move the laser welder 7 vertically, and the third linear motor 5 to move the laser welder 7 longitudinally, so that the laser welder 7 reaches the starting position of the front weld. The first servo motor 9 adjusts the irradiation direction of the laser welder 7 through the cooperation of the spline column and the spline countersunk hole, so that the laser beam corresponds to the front weld. After the positioning is completed, the laser welder 7 is started. The three linear motors cooperate with each other according to the weld path identified by the vision camera 8, so that the laser welder 7 moves along the front weld and completes the front welding of the automotive parts. The debris generated during the welding process falls down from both sides of the protective block or the corresponding gap and enters the collection tank 11 for collection. Step 4, Flipping and Backside Welding of Automotive Parts: After completing the frontside welding of the automotive parts, the control box first stops the welding operation of the laser welder 7, and controls the first linear motor 3, the second linear motor 4, and the third linear motor 5 to move the laser welder 7 to the flipping avoidance area of ​​the reversing frame 34. The second servo motor 22 continues to maintain its output shaft position, keeping the cam 14 at its highest peak and keeping the support platform 16 and the deflection frame 30 in a high horizontal position. Subsequently, the control box separately starts the third servo motor 31, which drives the air supply column 32 to rotate through the coupling. The air supply column 32 further drives the reversing frame 34 to rotate 180° relative to the deflection frame 30, causing the backside of the automotive parts to flip to the side facing the laser welder 7. During the flipping process of the reversing frame 34, the manual clamp 36, the second lifting rod 37, the second damping spring 39, and the rubber platform 38 hold... The car parts are clamped to prevent them from loosening or shifting. When the air supply column 32 rotates relative to the positioning sleeve 33, the air supply groove on the outside of the air supply column 32 is always connected to the annular air supply chamber. The two third sealing bearings are used to close the annular air supply chamber and support the rotation of the air supply column 32. Therefore, the external air supply pipe does not need to rotate with the air supply column 32, which can avoid the air supply pipe from getting tangled and ensure that the protective gas continues to enter the reverse frame 34 during the reversing process. After the reverse frame 34 completes a 180° reversal, the third servo motor 31 stops rotating and maintains the position of the reverse frame 34. The vision camera 8 re-acquires the position of the back of the car parts and the back weld. The three linear motors and the first servo motor 9 cooperate again to move the laser welder 7 to the starting position of the back weld and adjust the irradiation direction. Then the laser welder 7 is started to complete the back welding of the car parts along the back weld. Step 5, Delayed Gas Supply, Mechanism Reset, and Material Unloading Stop: After completing the back welding of the automotive parts, the control box shuts down the laser welder 7 and controls three linear motors to move the laser welder 7 to the initial clearance position; the air supply pump 12 continues to supply protective gas to the reversing frame 34 according to the preset time, providing delayed gas protection for the welded automotive parts and assisting in removing residual heat. After the delayed gas supply ends, the third servo motor 31 rotates in the reverse direction, causing the reversing frame 34 to return to the initial angle coplanar with the deflection frame 30; then the second servo motor 22 rotates in the reverse direction, causing the deflection frame 30 to gradually tilt from the horizontal welding position towards the sealed hinged door, while the first synchronous pulley 24 drives the rotating rod 13 to rotate in the reverse direction through the synchronous belt 29 and the third synchronous pulley 28. The cam 14 gradually returns from its highest peak to its lowest peak. As the cam 14 rotates, the first lifting rod 18, the lifting platform, the support platform 16, and the positioning plate 21 descend smoothly under the cooperation of the cam 14, the rotating wheel 19, and the first damping spring 20. The output shaft of the second servo motor 22 and the positioning cylinder 23 descend to the lowest point along the corresponding waist hole. The deflection frame 30 and the reversing frame 34 finally return to the low-position loading state tilted towards the sealed hinged door. After stopping the air supply pump 12, the sealed hinged door is opened, the manual clamp 36 is released, and the automotive parts with the front and back welds completed are taken out. When processing needs to continue, the next automotive part is put in and the above steps are repeated. When processing is no longer needed, the power supply to the equipment is cut off through the control box, and the external protective gas device is turned off.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding device for automotive parts with clamping and flipping function, comprising a welding box body (1), a welding chamber provided inside the welding box body (1), and a first support frame (2) vertically provided on both sides of the bottom surface of the rear end of the welding chamber, a connecting frame horizontally installed between the upper and lower sides of the first support frame (2), a first linear motor (3) horizontally installed at the front end of each of the two connecting frames, a first U-shaped frame vertically installed between the output plates of the two first linear motors (3), and a second linear motor (4) vertically installed inside the first U-shaped frame, a positioning frame longitudinally installed on the output plate of the second linear motor (4), and a second U-shaped frame longitudinally installed on the bottom surface of the positioning frame, and a third linear motor (5) longitudinally installed on the bottom surface of the second U-shaped frame, characterized in that: The bottom surface of the output plate of the third linear motor (5) is fixedly connected to a connecting block (6). A mounting block is provided on one side of the connecting block (6), and a laser welder (7) is installed in conjunction with the mounting block. A first servo motor (9) is provided on the other side. An extension plate is horizontally installed on the other side of the top surface of the positioning frame. A vision camera (8) is vertically installed on the top surface of the extension end of the extension plate. A through hole is opened in the middle of the connecting block (6) to be fixedly connected to the first servo motor (9). A spline countersunk hole is opened on the mounting block and the through hole on the same axis. The output shaft of the first servo motor (9) passes through the through hole, and a spline column adapted to the spline countersunk hole is fixedly connected to the extension end. Positioning platforms (10) are installed on both sides of the front end of the welding chamber. The positioning platforms (10) have a hollow structure and a protective block that is horizontally connected to each other in the lower middle part. A collection trough (11) for collecting waste chips is installed on the bottom surface of the welding chamber below the protective block. An air supply pump (12) is installed on the bottom surface of the welding chamber on one side of the positioning platform (10). A lifting and deflection linkage component for convenient material handling is installed between the two positioning platforms (10). A reversing cooling device adapted to the lifting and deflection linkage component is installed in one side of the positioning platform (10) and drives the subsequent welding objects to reverse. An adapted clamping component is installed in the reversing cooling device.

2. The automotive parts welding device with clamping and flipping function according to claim 1, characterized in that: The lifting and deflection linkage assembly includes a rotating rod (13) arranged laterally inside the protective block, and the two ends of the rotating rod (13) are respectively rotatably connected to the inner cavity walls of the two positioning platforms (10). The two ends of the rotating rod (13) are respectively fixedly connected to cams (14) placed in the inner cavity of the corresponding positioning platform (10). A fixing plate (15) is provided above the cam (14). The front and rear ends of the fixing plate (15) are fixed to the inner cavity walls of the positioning platform (10), and a lifting platform is provided above the fixing plate (15). A support platform (16) is fixedly connected to the top surface of the lifting platform. The four corners of the far ends of the two support platforms (16) are provided with positioning columns laterally, and the extension ends of the multiple positioning columns on one side are fixedly connected to positioning plates (21).

3. The automotive parts welding device with clamping and flipping function according to claim 2, characterized in that: The positioning platform (10) has guide rails (17) vertically installed on both sides of the front and rear end faces of the inner cavity. Multiple guide rails (17) on the same side are slidably connected to guide platforms, and the extension ends of multiple guide platforms are connected to the bottom surface of the lifting platform. The fixing plate (15) has a first sliding hole in the middle, and a first lifting rod (18) with a T-shaped structure is slidably connected to the first sliding hole. The extension end of the first lifting rod (18) is fixed with a U-shaped block, and the bottom surface of the horizontal end abuts against the top surface of the fixing plate (15). The top surface of the first lifting rod (18) abuts against the bottom surface of the lifting platform. A rotating wheel (19) is rotatably connected to the inner side of the U-shaped block, and the other end of the rotating wheel (19) abuts against the end face of the cam (14).

4. The automotive parts welding device with clamping and flipping function according to claim 3, characterized in that: A first damping spring (20) is sleeved on the outside of the first lifting rod (18). The two ends of the first damping spring (20) abut against the bottom surface of the fixed plate (15) and the top surface of the U-shaped block, respectively.

5. The automotive parts welding device with clamping and flipping function according to claim 2, characterized in that: The two positioning plates (21) are respectively provided with a second servo motor (22) and a third servo motor (31) at their far ends, and the output shafts of the second servo motor (22) and the third servo motor (31) pass through the positioning plate (21). The support platform (16) is provided with a rotating hole in the middle to accommodate the output shaft of the second servo motor (22). The axis of the rotating hole is flush with the axis of the rotating rod (13) on the vertical end face. The two positioning platforms (10) are connected above each other with a waist hole with the same diameter as the rotating hole. The output shaft of the second servo motor (22) passes through the rotating hole and the waist hole and is placed on the positioning platform (10) on the other side. The positioning plate (21) on one side is fixed to the other side with a positioning cylinder (23) that passes through the rotating hole and the waist hole. The output shaft of the third servo motor (31) passes through one side of the positioning plate (21) and is placed inside the positioning cylinder (23). The output shaft of the third servo motor (31) is sleeved with two positioning bearings on the outside. The outer side of the positioning bearings is fixed to the inner wall of the positioning cylinder (23).

6. The automotive parts welding device with clamping and flipping function according to claim 5, characterized in that: The second servo motor (22) and the positioning cylinder (23) are both fitted with first sealed bearings. The first sealed bearings are fitted with extrusion blocks (25) fixed to the end face of the positioning plate (21) and in the shape of an inverted triangle. The two first sealed bearings are respectively fixed to the output shaft of the second servo motor (22) and the outside of the positioning cylinder (23) at their close ends. The second synchronous wheel (26) is provided at the rear end below the first synchronous wheel (24). The second synchronous wheel (26) is installed on the inner side of the second synchronous wheel (26). The positioning rod is fixed to the inner side of the second sealed bearing. The inner wall of the positioning platform (10) A limiting groove is provided in the longitudinal direction for the longitudinal sliding of the positioning rod. A return spring is provided in the limiting groove. The two ends of the return spring are respectively fixed to one end face of the positioning rod and the inner side wall of the limiting groove. A rubber wheel (27) is rotatably connected to the outside of the positioning rod. The end of the inclined surface of the extrusion block (25) abuts against the outside of the rubber wheel (27). The outer sides of both ends of the rotating rod (13) are respectively fixed with a third synchronous wheel (28) placed in the inner cavity of the corresponding positioning platform (10). The first synchronous wheel (24), the second synchronous wheel (26) and the third synchronous wheel (28) on one side are all in the same vertical plane and are sleeved with a synchronous belt (29).

7. The automotive parts welding device with clamping and flipping function according to claim 6, characterized in that: The output shaft extension of the second servo motor (22) is fixedly connected to a deflection frame (30) placed between two positioning platforms (10). The deflection frame (30) has a sealed hollow structure, and the other end of the deflection frame (30) is connected to the extension of the positioning cylinder (23).

8. The automotive parts welding device with clamping and flipping function according to claim 6, characterized in that: The reverse cooling device includes an air supply column (32) connected to the end of the output shaft of the third servo motor via a coupling. The extended end of the air supply column (32) is provided with a countersunk hole, and multiple air supply grooves with connecting countersunk holes are provided at equal intervals on the outer side. Both sides of the air supply groove are provided with a third sealed bearing sleeved on the outer side of the air supply column (32). The two third sealed bearings are fitted with fixed positioning sleeves (33). One side of the positioning sleeve (33) is provided with a rigid first air supply pipe. The other end of the first air supply pipe is connected to the deflection frame (30), and the other end of the first air supply pipe is fitted with a flexible second air supply pipe. The other end of the second air supply pipe is connected to the air supply platform of the air supply pump (12).

9. The automotive parts welding device with clamping and flipping function according to claim 8, characterized in that: The deflection frame (30) has a rotatable reversing frame (34) inside. The reversing frame (34) is a sealed cavity structure. The other end of the air supply column (32) passes through the inside of the deflection frame (30) and is fixedly connected to the reversing frame (34). The reversing frame (34) is connected to an air supply hole adapted to the countersunk hole. A rotating column is fixedly connected to the middle of the other end of the reversing frame (34). The other end of the rotating column is rotatably connected to the inner side of the deflection frame (30). The reversing frame (34) has multiple air supply slots connected at equal intervals in the transverse section. Each of the multiple air supply slots is provided with a filter screen (35) fixedly connected to the inside of the reversing frame (34) in the same proportion.

10. A welding device for automotive parts with clamping and flipping function according to claim 8, characterized in that: The adapter clamping assembly includes multiple manual clamps (36) equidistantly installed on the top and bottom surfaces of the reversing frame (34). The extension section of the manual clamp (36) is vertically provided with a second sliding hole, and a second lifting rod (37) with a T-shaped structure is slidably connected to the second sliding hole. The bottom surface of the horizontal end of the second lifting rod (37) abuts against the top surface of the extension end of the manual clamp (36), and an abutment plate is fixedly connected to the outer side of the extension end of the second lifting rod (37). A second damping spring (39) is sleeved on the outer side of the second lifting rod (37). The two ends of the second damping spring (39) abut against the top surface of the abutment plate and the bottom surface of the extension end of the manual clamp (36), respectively. A ball joint is installed on the extension end surface of the second lifting rod (37), and a rubber platform (38) is ball-jointed at the other end of the ball joint.

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