Multilayer synchronous pressure applying mechanism for polymer diffusion welding of copper-aluminum composite bus

Abstract

The present application relates to the technical field of welding fixture, especially to a multi-layer synchronous pressing mechanism for polymer diffusion welding of copper-aluminum composite row, comprising a welding cabinet, a polymer diffusion welding mechanism for welding copper-aluminum composite row is arranged on the welding cabinet, a circular ring is arranged at the top of the welding cabinet, a feeding mechanism for alternately feeding copper-aluminum composite row is arranged on the circular ring, a mounting mechanism for sleeving aluminum sheet is arranged on the welding cabinet, and a discharging mechanism for automatically discharging copper-aluminum composite row is further arranged on the circular ring. Through the cooperation of the four-station rotary layout of the circular ring and the aluminum sheet automatic mounting mechanism, the full-process automation of copper-aluminum composite row from copper sheet clamping, aluminum sheet sleeving, fixture limiting to welding is realized. The aluminum sheet is automatically opened and sleeved into the multi-layer copper sheet under the action of the mounting mechanism, without manual sleeving and clamping of each piece, and the circular ring rotation orderly connects each station, so that the mounting and welding processes run in parallel.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, and in particular to a multi-layer synchronous pressure mechanism for copper-aluminum composite polymer diffusion welding. Background Technology

[0002] In the field of copper-aluminum composite busbar welding, polymer diffusion welding is a solid-state welding method that does not require solder and uses high temperature and high pressure to allow copper and aluminum atoms to diffuse into each other to form a metallurgical bond. To achieve synchronous welding of multi-layer copper-aluminum composite busbars, a multi-layer synchronous pressure mechanism is required. This mechanism mainly consists of a pressure frame, a hydraulic drive system, multi-layer pressure plates, pressure sensors, and heating elements. In use, the multi-layer copper-aluminum composite busbars are first clamped in a graphite mold according to the designed stacking method. Then, the multi-layer pressure plates press down synchronously to apply uniform pressure to each layer of material. At the same time, the heating elements are heated to the set temperature. Under the action of continuous pressure and temperature, the atoms at the copper-aluminum contact surface fully diffuse and penetrate. Finally, the pressure is maintained and the material is cooled and shaped to form a strong metallurgical joint.

[0003] In polymer diffusion welding of copper-aluminum composite busbars, aluminum sheets need to be fitted into the front end of the copper busbar to form a copper-aluminum transition joint, meeting the corrosion resistance requirements of dissimilar metal conductive connections. In the existing production process, workers first need to fit the aluminum sheet onto the front end of the copper busbar, then temporarily fix the copper-aluminum stack with clamps, and then position the copper-aluminum composite busbar on a fixture. After the fixture is clamped, the clamp is removed, and finally the entire fixture is placed into a multi-layer synchronous pressure mechanism for welding. This process relies on manual operation for each piece. After the previous copper-aluminum composite busbar is welded, the fixture must be removed before the next workpiece can be placed, which makes continuous production impossible. Furthermore, the manual fitting, clamping, and mounting processes are time-consuming, and the positioning consistency of the copper-aluminum stack is poor, resulting in low production efficiency, large fluctuations in welding quality, and high labor intensity for workers, making it difficult to meet the automated production needs of large-volume copper-aluminum composite busbars.

[0004] Therefore, a multi-layer synchronous pressure mechanism for polymer diffusion welding of copper-aluminum composite tubes is proposed to solve the above problems. Summary of the Invention

[0005] To address the technical problem of low clamping efficiency in existing copper-aluminum composite busbars, this invention provides a multi-layer synchronous pressure application mechanism for polymer diffusion welding of copper-aluminum composite busbars.

[0006] The technical solutions provided by the embodiments of the present invention are as follows: This invention provides a multi-layer synchronous pressure mechanism for polymer diffusion welding of copper-aluminum composite bars, comprising a welding cabinet, a polymer diffusion welding mechanism for welding copper-aluminum composite bars, a ring at the top of the welding cabinet, a feeding mechanism for rotating copper-aluminum composite bars, an installation mechanism for mounting aluminum sheets, and a feeding mechanism for automatically unloading copper-aluminum composite bars. The feeding mechanism includes a drive motor, an upper electric telescopic cylinder, an upper clamping plate, and a rotating frame. The top of the ring is provided with four slots at equal intervals for placing multi-layer copper-aluminum composite bars. The rotating frame is rotatably connected to the top of the welding cabinet. The outer wall of the rotating frame is fixedly connected to the inner side of the ring. The drive motor is fixedly connected to the top of the welding cabinet. The output end of the drive motor passes through the top of the welding cabinet and is fixedly connected to the bottom of the rotating frame. There are four upper clamping plates and four upper electric telescopic cylinders. The top of the ring is provided with a vertical groove relative to the position next to the slot. The four upper electric telescopic cylinders are fixedly connected to the inside of the vertical groove. The four upper clamping plates are fixedly connected to the output end of the upper electric telescopic cylinders.

[0007] In the above technical solution, the installation mechanism further includes a storage frame, a support frame, a movable frame, an upper flip plate and a lower flip plate. The storage frame is fixedly connected to the top of the welding cabinet. The storage frame is located next to the circular ring. A U-shaped groove is opened through the front side of the storage frame. The support frame is fixedly connected to the rear side of the storage frame. The movable frame is laterally slidably connected to the rear side of the storage frame. The upper flip plate is positioned above the movable frame, and the lower flip plate is positioned below the movable frame. Both the upper and lower flip plates are L-shaped plates, symmetrically arranged. Adsorption mechanisms for adsorbing aluminum sheets are provided on the sides of both the upper and lower flip plates that are close to each other. A pair of side rods are fixedly connected to the side of the movable frame away from the circular ring, and a fixed frame is fixedly connected to the side rods away from the movable frame. The storage frame is also equipped with a pushing mechanism, and the circular ring is also equipped with a clamping mechanism for clamping the aluminum sheets after assembly. Through the cooperation of the four-station rotating layout of the circular ring and the automatic aluminum sheet installation mechanism, the entire process of copper-aluminum composite busbar assembly, from copper sheet clamping, aluminum sheet insertion, fixture limiting to welding, is fully automated. The process is automated. The aluminum sheets are pre-folded and placed in a storage box. The feeding mechanism pushes them to the installation station and automatically unfolds them. When the rotating ring moves the multi-layer copper sheets to the side of the installation mechanism, the aluminum sheets are automatically fitted into the front end of the multi-layer copper sheets. Then, the clamping mechanism on the ring automatically limits and fixes the copper-aluminum stack. The ring continues to rotate and sends the installed copper-aluminum composite busbar to the welding station, where the polymer diffusion welding mechanism completes the welding. This process does not require manual fitting and clamping of each piece. The stations are connected in an orderly manner through the rotation of the ring, allowing the installation and welding processes to operate in parallel. This greatly improves the production efficiency of the copper-aluminum composite busbar, reduces the intensity of manual labor, and ensures the consistency of the positioning of the copper-aluminum stack, thus improving the stability of the welding quality.

[0008] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, through the combination of a four-station rotating circular layout and an automatic aluminum sheet installation mechanism, achieves full automation of the copper-aluminum composite busbar process, from copper sheet clamping, aluminum sheet insertion, fixture positioning to welding. Under the action of the installation mechanism, the aluminum sheets automatically open and insert multiple layers of copper sheets, eliminating the need for manual sheet insertion and clamping. The circular rotation connects each station in an orderly manner, allowing the installation and welding processes to operate in parallel, significantly improving the production efficiency of the copper-aluminum composite busbar, reducing manual labor intensity, and ensuring the consistency of copper-aluminum layer positioning, thereby improving the stability of welding quality.

[0009] 2. This invention, through the setting of the unloading mechanism, can realize the functions of automatic release of limit and automatic discharge, realizing unmanned unloading of copper-aluminum composite busbars after welding. After the ring rotates the welded workpiece to the unloading station, the corresponding clamping mechanism and unloading mechanism are automatically started, and the copper-aluminum composite busbar is automatically discharged under the action of gravity. There is no need for manual removal from the fixture, so that loading, installation, welding and unloading form a complete automated cycle, eliminating the waiting time for manual part removal, further improving the continuous production capacity of the equipment and reducing the operational safety risks. Attached Figure Description

[0010] Figure 1 This is a frontal perspective view of the polymer diffusion welding device of the present invention. Figure 2 Appendix of the present invention Figure 1 A magnified view of the structure at point A in the middle; Figure 3 This is a bottom-view perspective view of the drive motor, ring, and discharge frame of the present invention. Figure 4 Appendix of the present invention Figure 3 A magnified schematic diagram of the structure at point B in the middle; Figure 5 This is a top-view perspective view of the ring and storage frame structure of the present invention; Figure 6 This is a top-view, partially sectional, three-dimensional structural diagram of the ring and drive motor of the present invention; Figure 7 This is a rear perspective three-dimensional structural diagram of the storage frame and support frame of the present invention; Figure 8 This is a front three-dimensional structural diagram of the support frame, upper flip plate, and lower flip plate of the present invention. Figure 9 This is a rear-view perspective three-dimensional structural diagram of the adjustable electric telescopic cylinder, the movable frame, and the round rod of the present invention. Figure 10 This is a rear-view perspective three-dimensional structural diagram of the rear electric telescopic cylinder and the middle block of the present invention; Figure 11 This is a rear-view perspective view of the three-dimensional structure of the movable frame, upper flip plate, and lower flip plate of the present invention after adjustment. Figure 12 This is a partial cross-sectional perspective view of the storage frame and side frame of the present invention. Figure 13 This is a top-view three-dimensional structural diagram of the lower flap of the present invention; Figure 14 This is a three-dimensional structural diagram of the upward-facing flip-up plate of the present invention, viewed from below.

[0011] In the diagram: 1. Welding cabinet; 2. Polymer diffusion welding mechanism; 3. Ring; 4. Drive motor; 5. Upper electric telescopic cylinder; 6. Upper clamping plate; 7. Slot; 8. Storage frame; 9. Support frame; 10. Moving frame; 11. Upper flip plate; 12. Lower flip plate; 13. U-shaped groove; 14. Adsorption mechanism; 15. Side rod; 16. Scroll spring; 17. Fixed frame; 18. Adjustable electric telescopic cylinder; 19. U-shaped plate; 20. Round rod; 21. Moving electric telescopic cylinder; 22. Middle block; 23. 24. Rear electric telescopic cylinder; 25. Pushing motor; 26. Pushing plate; 27. Threaded rod; 28. Side frame; 29. ​​Front electric telescopic cylinder; 30. Clamping block; 31. Front frame; 32. Touch sensor; 33. L-shaped touch rod; 34. Unloading plate; 35. Unloading electric telescopic cylinder; 36. Discharge frame; 37. Upper position sensor; 38. Lower position sensor; 39. Unloading chute; 40. Discharge chute; 41. Rotating frame; 42. Upper hinge seat; 43. Lower hinge seat; 44. Circular groove. Detailed Implementation

[0012] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0014] In practical use, it was found that in the existing production process, workers first need to put aluminum sheets on the front end of the copper busbar, then temporarily fix the copper-aluminum stack with clamps, then place the copper-aluminum composite busbar on the fixture for positioning, and after the fixture is clamped, remove the clamps. Finally, the entire fixture is placed into the multi-layer synchronous pressure mechanism for welding. This process relies on manual operation for each piece. After the previous copper-aluminum composite busbar is welded, the fixture must be removed before the next workpiece can be placed. Continuous production cannot be achieved. Furthermore, the manual sheet fitting, clamping, and mounting processes are time-consuming, and the positioning consistency of the copper-aluminum stack is poor, resulting in low production efficiency, large fluctuations in welding quality, and high labor intensity for workers. It is difficult to meet the automated production needs of large-volume copper-aluminum composite busbars. To solve the above problems, the following structure was invented.

[0015] like Figures 1-14 The invention relates to a multi-layer synchronous pressure mechanism for polymer diffusion welding of copper-aluminum composite bars, comprising a welding cabinet 1, a polymer diffusion welding mechanism 2 for welding copper-aluminum composite bars, and a hydraulic drive system. The heating element heats the copper-aluminum composite bars in the fixture, and the hydraulic drive system drives the multi-layer pressure head to press down synchronously, applying uniform pressure to the copper-aluminum stack. Under continuous high temperature and high pressure, the atoms at the copper-aluminum contact surface diffuse and penetrate to form a metallurgical bond. After cooling, the welding is completed. The top of the welding cabinet 1 is provided with a ring 3, which is provided with a feeding mechanism for rotating and feeding copper-aluminum composite bars. The welding cabinet 1 is provided with an installation mechanism for mounting aluminum sheets, and the ring 3 is also provided with a feeding mechanism for automatically unloading copper-aluminum composite bars. The feeding mechanism includes a drive motor 4, an upper electric telescopic cylinder 5, an upper clamping plate 6, and a rotating frame 40. The top of the ring 3 is provided with four slots 7 at equal intervals for placing multi-layer copper-aluminum composite bars. The rotating frame 40 is rotatably connected to the top of the welding cabinet 1. The outer wall of the rotating frame 40 is fixedly connected to the inner side of the ring 3. The drive motor 4 is fixedly connected to the top of the welding cabinet 1. The output end of the drive motor 4 passes through the top of the welding cabinet 1 and is fixedly connected to the bottom of the rotating frame 40. There are four upper clamping plates 6 and four upper electric telescopic cylinders 5. The top of the ring 3 is provided with a vertical groove relative to the position next to the slot 7. The four upper electric telescopic cylinders 5 are fixedly connected to the inside of the vertical groove. The four upper clamping plates 6 are fixedly connected to the output end of the upper electric telescopic cylinders 5.

[0016] The installation mechanism includes a storage frame 8, a support frame 9, a movable frame 10, an upper flip plate 11, and a lower flip plate 12. The storage frame 8 is fixedly connected to the top of the welding cabinet 1. The storage frame 8 is located next to the ring 3. A U-shaped groove 13 is opened through the front side of the storage frame 8. The support frame 9 is fixedly connected to the rear side of the storage frame 8. The movable frame 10 is slidably connected to the rear side of the storage frame 8. The upper flip plate 11 is located above the movable frame 10, and the lower flip plate 12 is located below the movable frame 10. Both the upper flip plate 11 and the lower flip plate 12 are L-shaped plates. The upper flip plate 11 and the lower flip plate 12 are symmetrically arranged. The upper flip plate 11 and the lower flip plate 12 are provided with adsorption mechanisms 14 for adsorbing aluminum sheets on the side close to each other. A pair of side rods 15 are fixedly connected to the side of the movable frame 10 away from the ring 3. A fixed frame 17 is fixedly connected to the side rods 15 away from the movable frame 10. The storage frame 8 is also provided with a pushing mechanism. The ring 3 is also provided with a clamping mechanism for clamping the position of the aluminum sheets after the set.

[0017] Both sides of the bottom of the vertical section of the upper flap 11 are fixedly connected to upper hinge seats 41, and the middle of the top of the vertical section of the lower flap 12 is fixedly connected to a lower hinge seat 42. The upper hinge seats 41 are rotatably connected to the side of the side rod 15 on the side closer to each other, and the lower hinge seats 42 are rotatably connected to the side of the side rod 15 on both sides. Both sides of the outer wall of the two side rods 15 are provided with annular grooves 43, and each annular groove 43 is provided with a spiral spring 16. One end of the spiral spring 16 is fixedly connected to the inner side of the annular groove 43, and the other end of the spiral spring 16 is fixedly connected to the side wall of the corresponding upper hinge seat 41 and lower hinge seat 42 respectively. The length of the upper flap 11 and the lower flap 12 is less than the length of the U-shaped aluminum sheet. The spiral spring 16 on the upper flap 11 and the spiral spring 16 on the lower flap 12 have opposite compression and rotation directions.

[0018] An adjustable electric telescopic cylinder 18 is fixedly connected to the inside of the fixed frame 17. The output end of the adjustable electric telescopic cylinder 18 passes through the fixed frame 17 and is fixedly connected to the outer wall of the U-shaped plate 19. Both ends of the U-shaped plate 19 are fixedly connected to round rods 20 for pressing the outer walls of the upper flip plate 11 and the lower flip plate 12.

[0019] A movable electric telescopic cylinder 21 is fixedly connected to the side of the support frame 9 away from the ring 3. The output end of the movable electric telescopic cylinder 21 is fixedly connected to the outer wall of the fixed frame 17. A middle block 22 for limiting the position of the U-shaped aluminum sheet is provided between the upper flip plate 11 and the lower flip plate 12. A rear electric telescopic cylinder 23 is fixedly connected to the rear side of the support frame 9. The output end of the rear electric telescopic cylinder 23 passes through the support frame 9 and is fixedly connected to the rear side of the middle block 22.

[0020] The feeding mechanism includes a feeding motor 24, a feeding plate 25, a threaded rod 26, and a side frame 27. The side frame 27 is fixedly connected to the storage frame 8 on the side away from the ring 3. The threaded rod 26 is rotatably connected to the inside of the side frame 27. The front side of the side frame 27 extends out of the front end of the storage frame 8. The feeding motor 24 is fixedly connected to the front side of the side frame 27. The output end of the feeding motor 24 passes through the inside of the side frame 27 and is fixedly connected to the front end of the threaded rod 26. The feeding plate 25 is slidably connected to the inside of the side frame 27, and the threaded rod 26 is threadedly connected to the inner wall of the feeding plate 25.

[0021] The clamping mechanism includes a front electric telescopic cylinder 28, a clamping block 29, and a front frame 30. There are four pairs of front electric telescopic cylinders 28 and clamping blocks 29, and four front frames 30. The four front frames 30 are equidistantly distributed and fixedly connected to the top of the ring 3. Among them, four front electric telescopic cylinders 28 are fixedly connected to the side of the front frame 30 away from each other, and the other four front electric telescopic cylinders 28 are fixedly connected to the outer wall of the ring 3. The four pairs of clamping blocks 29 are fixedly connected to the output end of the front electric telescopic cylinder 28. Touch sensors 31 are fixedly connected to the outer wall of the lower front electric telescopic cylinder 28, and L-shaped touch rods 32 are fixedly connected to the bottom of the lower flap 12. The touch sensors 31 are electrically connected to the corresponding front electric telescopic cylinder 28 through the controller.

[0022] When welding the copper-aluminum composite busbar, first insert the folded aluminum sheets into the U-shaped groove 13 in the storage frame 8 in sequence (at this time, the last aluminum sheet will be pushed between the upper flip plate 11, the lower flip plate 12, the moving frame 10 and the middle block 22, and then the pusher motor 24 can be controlled to start and drive the threaded rod 26 to rotate, thereby driving the threaded connection to move the pusher plate 25, so that the pusher plate 25 moves to the position in front of the aluminum sheet at the front end). Then, insert the copper busbar with one end welded into the slot 7, and then control the upper electric telescopic cylinder 5 to start and drive the upper clamping plate 6 to move downward, clamping the copper busbar in the slot 7. Then, control the drive motor 4 to start and drive the rotating frame 40 and the ring 3 to rotate, rotating the copper busbar to the position next to the moving frame 10. At this time, the other copper busbar can be inserted into the slot 7 at the front end. At the same time, the adsorption mechanism 14 is activated to adsorb and fix the U-shaped aluminum sheet to the side walls of the upper flip plate 11 and the lower flip plate 12. Then, the electric telescopic cylinder 18 is activated to drive the U-shaped plate 19 and the round rod 20 to move, thereby relieving the compression on the upper flip plate 11 and the lower flip plate 12. Then, under the elastic force of the spiral spring 16, the upper flip plate 11 and the lower flip plate 12 are pushed to rotate around the hinge, thereby causing the upper flip plate 11 to flip upward and the lower flip plate 12 to flip downward (it should be noted that the spiral springs 16 on the side walls of the upper flip plate 11 and the lower flip plate 12 are set in opposite directions of rotation and compression), thereby causing the U-shaped aluminum sheet to open. Then, the electric telescopic cylinder 23 can be activated to drive the middle block 22 to move away from the side of the moving frame 10. Then, the electric telescopic cylinder 21 can be controlled to start and drive the fixed frame 17, the moving frame 10, the upper flip plate 11 and the lower flip plate 12 to move, thereby moving the aluminum sheet to the rotating copper busbar. At the same time, the side end of the copper busbar will be in contact with the inner side of the aluminum sheet. Then, the electric telescopic cylinder 18 can be controlled to move in the opposite direction, thereby driving the U-shaped plate 19 and the round rod 20 to move. The movement of the round rod 20 will squeeze the upper flip plate 11 and the lower flip plate 12 to flip in the middle, thereby driving the upper and lower ends of the aluminum sheet to flip to the upper and lower ends of the copper busbar. At the same time, the flipping of the lower flip plate 12 will drive the L-shaped touch rod 32 to flip, so that the L-shaped touch rod 32 touches the corresponding touch sensor 31. Then, the touch sensor 31 transmits the signal to the controller, and the controller controls the corresponding front electric telescopic cylinder 28 to start, thereby driving the corresponding clamping block 29 to move in the middle to limit and clamp the copper-aluminum stack. Finally, the adsorption mechanism 14 is controlled to release the adsorption and fixation of the aluminum sheet. Then, the moving electric telescopic cylinder 21 is controlled to drive the upper flip plate 11 and the lower flip plate 12 to reset. Subsequently, the rear electric telescopic cylinder 23 is controlled to drive the middle block 22 to reset. At this time, the drive motor 4 is controlled to drive the rotating frame 40 and the ring 3 to rotate. The copper-aluminum composite busbar is rotated to the welding station and welded by the polymer diffusion welding mechanism 2. During this process, the pusher motor 24 is controlled to start and drive the threaded rod 26 to rotate, which in turn drives the threaded pusher plate 25 to move, thereby pushing the aluminum sheet in the U-shaped groove 13 to the position between the upper flip plate 11, the lower flip plate 12, the moving frame 10 and the middle block 22. Then, the above operation can be repeated to put the aluminum sheet on the next copper busbar.

[0023] In summary, the above structural design achieves full automation of the copper-aluminum composite busbar process, from copper sheet clamping, aluminum sheet insertion, fixture positioning to welding. The aluminum sheets are pre-folded and placed in the storage frame 8, then pushed to the installation station by the pushing mechanism and automatically unfolded. When the ring 3 rotates and moves the multi-layer copper sheets to the side of the installation mechanism, the aluminum sheets are automatically inserted into the front end of the multi-layer copper sheets. Subsequently, the clamping mechanism on the ring 3 automatically limits and fixes the copper-aluminum stack. The ring 3 continues to rotate and delivers the installed copper-aluminum composite busbar to the welding station, where the polymer diffusion welding mechanism 2 completes the welding. This process eliminates the need for manual piece-by-piece fitting and clamping. The various stations are connected in an orderly manner through the rotation of the ring 3, allowing the installation and welding processes to operate in parallel, significantly improving the production efficiency of the copper-aluminum composite busbar, reducing manual labor intensity, ensuring the consistency of copper-aluminum stack positioning, and improving the stability of welding quality.

[0024] Based on the above embodiments, it was found during use that although the above can realize the automatic installation and welding of copper-aluminum composite bars, after the welding is completed, the copper-aluminum composite bars still need to be manually removed from the fixture. The next workpiece can only be placed after the previous workpiece is removed, which cannot realize the parallel operation of loading and unloading, resulting in waiting gaps in the equipment, limiting production efficiency. Moreover, manual removal of parts in high-temperature environments poses safety hazards and is difficult to meet the needs of continuous and automated production of copper-aluminum composite bars. To solve the above problems, further improvements were made to the above structure.

[0025] The feeding mechanism includes a feeding plate 33, a feeding electric telescopic cylinder 34, a discharge frame 35, an upper position sensor 36 and a lower position sensor 37. The bottom of the slot 7 is provided with a feeding groove 38, and the side wall of the feeding groove 38 is provided with a storage groove. There are four feeding plates 33, four feeding electric telescopic cylinders 34 and four upper position sensors 36. The four feeding plates 33 are all set in the feeding groove 38. The four feeding electric telescopic cylinders 34 are all fixedly connected to the inside of the receiving groove. The output end of the feeding electric telescopic cylinder 34 is fixedly connected to the side wall of the feeding plate 33. The four upper position sensors 36 are fixedly connected at equal intervals to the bottom of the ring 3. The top of the welding cabinet 1 is provided with a discharge groove 39. The discharge frame 35 is fixedly connected to the inside of the discharge groove 39.

[0026] The material discharge frame 35 is installed through the outer wall of the welding cabinet 1. The lower position sensor 37 is fixedly connected to the inside of the material discharge trough 39 and is positioned directly below one of the upper position sensors 36. The upper position sensor 36 is electrically connected to the corresponding electric telescopic cylinder 34 for material discharge. Both the upper position sensor 36 and the lower position sensor 37 are photoelectric through-beam sensors. When the ring 3 rotates and moves the copper-aluminum composite material after welding to above the material discharge trough 39, the upper position sensor 36 rotates to directly above the lower position sensor 37. The two sensors form a through-beam path. The light signal is captured by the receiver and converted into an electrical signal, which is then transmitted to the controller. The controller determines that the material discharge station has been reached and then controls the electric telescopic cylinder 34 for material discharge and the front electric telescopic cylinder 28 to start and complete the automatic material discharge.

[0027] After the copper-aluminum composite busbar on the ring 3 is welded, the drive motor 4 will drive the ring 3 to rotate, thereby rotating the welded copper-aluminum composite busbar to a position above the discharge trough 39. At the same time, the corresponding upper position sensor 36 rotates to a position above the lower position sensor 37. The upper position sensor 36 receives a signal and transmits it to the controller. The controller controls the discharge electric telescopic cylinder 34 and the front electric telescopic cylinder 28 to start and drive the clamping block 29 to reset, releasing the initial limit on the copper-aluminum composite busbar. Then, the controller controls the discharge electric telescopic cylinder 34 to start and drive the discharge plate 33 to move into the receiving trough, thereby releasing the limit on the bottom of the copper-aluminum composite busbar. Then, under its own weight, the copper-aluminum composite busbar will fall into the discharge trough 39 and then fall into the discharge frame 35 for discharge.

[0028] In summary, the above structural design enables automatic release of limit switches and automatic discharge, achieving unmanned unloading of the copper-aluminum composite busbar after welding. After the ring 3 rotates the welded workpiece to the unloading station, the corresponding clamping and unloading mechanisms are automatically activated, and the copper-aluminum composite busbar is automatically discharged under gravity, eliminating the need for manual removal from the fixture. This forms a complete automated cycle of loading, installation, welding, and unloading, eliminating the waiting time for manual part removal, further improving the continuous production capacity of the equipment, and reducing operational safety risks.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention.

[0030] 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 the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A multi-layer synchronous pressure application mechanism for polymer diffusion welding of copper-aluminum composite busbars, comprising a welding cabinet (1), wherein the welding cabinet (1) is provided with a polymer diffusion welding mechanism (2) for welding copper-aluminum composite busbars, characterized in that, The welding cabinet (1) is provided with a ring (3) at the top. The ring (3) is provided with a feeding mechanism for rotating the copper-aluminum composite busbar. The welding cabinet (1) is provided with an installation mechanism for mounting aluminum sheets. The ring (3) is also provided with a feeding mechanism for automatically unloading the copper-aluminum composite busbar. The feeding mechanism includes a drive motor (4), an upper electric telescopic cylinder (5), an upper clamping plate (6), and a rotating frame (40). The top of the ring (3) is provided with four slots (7) for placing multi-layer copper-aluminum composite bars at equal intervals. The rotating frame (40) is rotatably connected to the top of the welding cabinet (1). The outer wall of the rotating frame (40) is fixedly connected to the inner side of the ring (3). The drive motor (4) is fixedly connected to the top of the welding cabinet (1). The output end of the drive motor (4) passes through the top of the welding cabinet (1) and is fixedly connected to the bottom of the rotating frame (40). The upper clamping plate (6) and the upper electric telescopic cylinder (5) are provided in four ways. The top of the ring (3) is provided with a vertical groove relative to the position next to the slot (7). The four upper electric telescopic cylinders (5) are fixedly connected to the inside of the vertical groove. The four upper clamping plates (6) are fixedly connected to the output end of the upper electric telescopic cylinder (5). The installation mechanism includes a storage frame (8), a support frame (9), a movable frame (10), an upper flip plate (11), and a lower flip plate (12). The storage frame (8) is fixedly connected to the top of the welding cabinet (1). The storage frame (8) is located next to the ring (3). A U-shaped groove (13) is opened through the front side of the storage frame (8). The support frame (9) is fixedly connected to the rear side of the storage frame (8). The movable frame (10) is slidably connected to the rear side of the storage frame (8). The upper flip plate (11) is set above the movable frame (10), and the lower flip plate (12) is set below the movable frame (10). Both the upper flip plate (11) and the lower flip plate (12) are set as L-shaped plates. The upper flip plate (11) and the lower flip plate (12) are symmetrically arranged. The upper flip plate (11) and the lower flip plate (12) are provided with an adsorption mechanism (14) for adsorbing aluminum sheets on the side close to each other. A pair of side rods (15) are fixedly connected to the side of the movable frame (10) away from the ring (3). A fixed frame (17) is fixedly connected to the side of the side rods (15) away from the movable frame (10). A pushing mechanism is also provided on the storage frame (8). A clamping mechanism for clamping the position of the aluminum sheet after the set is provided on the ring (3).

2. The multi-layer synchronous pressure application mechanism for copper-aluminum composite polymer diffusion welding according to claim 1, characterized in that, The upper hinge seat (41) is fixedly connected to both sides of the bottom of the vertical part of the upper flap (11), and the lower hinge seat (42) is fixedly connected to the middle of the top of the vertical part of the lower flap (12). The upper hinge seats (41) are rotatably connected to the side rod (15) on the side away from each other on the side closer to each other. The lower hinge seats (42) are rotatably connected to the side rod (15) on both sides closer to each other on the side rod (15). Circular grooves (43) are provided on both sides of the outer wall of the two side rods (15). 3) Each is equipped with a spiral spring (16). One end of each spiral spring (16) is fixedly connected to the inner side of the annular groove (43). The other end of each spiral spring (16) is fixedly connected to the side wall of the corresponding upper hinge seat (41) and lower hinge seat (42). The length of the upper flap (11) and the lower flap (12) is less than the length of the U-shaped aluminum sheet. The spiral spring (16) on the upper flap (11) and the spiral spring (16) on the lower flap (12) have opposite compression and rotation directions.

3. The multi-layer synchronous pressure application mechanism for copper-aluminum composite polymer diffusion welding according to claim 1, characterized in that, An adjustable electric telescopic cylinder (18) is fixedly connected to the inside of the fixed frame (17). The output end of the adjustable electric telescopic cylinder (18) passes through the fixed frame (17) and is fixedly connected to the outer wall of the U-shaped plate (19). Both ends of the U-shaped plate (19) are fixedly connected to round rods (20) for pressing the outer walls of the upper flip plate (11) and the lower flip plate (12).

4. The multi-layer synchronous pressure application mechanism for copper-aluminum composite polymer diffusion welding according to claim 1, characterized in that, A movable electric telescopic cylinder (21) is fixedly connected to the side of the support frame (9) away from the ring (3). The output end of the movable electric telescopic cylinder (21) is fixedly connected to the outer wall of the fixed frame (17). A middle block (22) for limiting the position of the U-shaped aluminum sheet is provided between the upper flip plate (11) and the lower flip plate (12). A rear electric telescopic cylinder (23) is fixedly connected to the rear side of the support frame (9). The output end of the rear electric telescopic cylinder (23) passes through the support frame (9) and is fixedly connected to the rear side of the middle block (22).

5. The multi-layer synchronous pressure application mechanism for copper-aluminum composite polymer diffusion welding according to claim 1, characterized in that, The feeding mechanism includes a feeding motor (24), a feeding plate (25), a threaded rod (26), and a side frame (27). The side frame (27) is fixedly connected to the storage frame (8) on the side away from the ring (3). The threaded rod (26) is rotatably connected to the inside of the side frame (27). The front side of the side frame (27) extends out of the front end of the storage frame (8). The feeding motor (24) is fixedly connected to the front side of the side frame (27). The output end of the feeding motor (24) passes through the inside of the side frame (27) and is fixedly connected to the front end of the threaded rod (26). The feeding plate (25) is slidably connected to the inside of the side frame (27), and the threaded rod (26) is threadedly connected to the inner wall of the feeding plate (25).

6. The multi-layer synchronous pressure application mechanism for copper-aluminum composite polymer diffusion welding according to claim 1, characterized in that, The clamping mechanism includes a front electric telescopic cylinder (28), a clamping block (29), and a front frame (30). There are four pairs of front electric telescopic cylinders (28) and clamping blocks (29), and four front frames (30). The four front frames (30) are equidistantly distributed and fixedly connected to the top of the ring (3). The four front electric telescopic cylinders (28) are fixedly connected to the side of the front frame (30) that is far away from each other. The other four front electric telescopic cylinders (28) are fixedly connected to the outer wall of the ring (3). The four pairs of clamping blocks (29) are fixedly connected to the output end of the front electric telescopic cylinder (28). Touch sensors (31) are fixedly connected to the outer wall of the lower electric telescopic cylinder (28), and L-shaped touch rods (32) are fixedly connected to the bottom of the lower flap (12). The touch sensors (31) are electrically connected to the corresponding front electric telescopic cylinder (28) through the controller.

7. The multi-layer synchronous pressure application mechanism for copper-aluminum composite polymer diffusion welding according to claim 1, characterized in that, The feeding mechanism includes a feeding plate (33), a feeding electric telescopic cylinder (34), a discharge frame (35), an upper position sensor (36) and a lower position sensor (37). The bottom of the slot (7) is provided with a feeding groove (38), and the side wall of the feeding groove (38) is provided with a storage groove. The feeding plate (33), feeding electric telescopic cylinder (34) and upper position sensor (36) are all provided in fours. The four feeding plates (33) are all set in the feeding groove (38). The four feeding electric telescopic cylinders (34) are all fixedly connected to the inside of the receiving groove. The output end of the feeding electric telescopic cylinder (34) is fixedly connected to the side wall of the feeding plate (33). The four upper position sensors (36) are fixedly connected at equal intervals to the bottom of the ring (3). The top of the welding cabinet (1) is provided with a discharge groove (39). The discharge frame (35) is fixedly connected to the inside of the discharge groove (39).

8. The multi-layer synchronous pressure application mechanism for copper-aluminum composite polymer diffusion welding according to claim 7, characterized in that, The side end of the discharge frame (35) is set through the outer wall of the welding cabinet (1), the lower position sensor (37) is fixedly connected to the inside of the discharge trough (39), and is located directly below one of the upper position sensors (36). The upper position sensor (36) is electrically connected to the corresponding discharge electric telescopic cylinder (34).

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