A bending device for copper busbar production and processing

Abstract

This invention discloses a bending device for copper busbar production and processing, relating to the field of bending equipment technology. It includes a base plate, a top plate, and a fixed module. The top plate is located directly above the base plate, and a supporting structure connects the top and bottom plates. The fixed module is fixed to the base plate, and its top has a first right-angle groove and a second right-angle groove, which are adjacent to each other. Third limiting plates are fixed to both sides of the fixed module. This invention integrates two bending stations onto the same fixed module. With two independently controlled right-angle pressure heads and moving components, all bending processes for U-shaped busbars can be completed on a single machine without transferring workpieces across stations, thus reducing the overall space occupied by the equipment and minimizing auxiliary time spent on workpiece transfer. Simultaneously, multiple limiting plates and movable arc block structures automatically complete secondary positioning of the workpiece during bending, reducing the amount of manual repositioning.

Description

Technical Field

[0001] This invention relates to the field of bending equipment technology, and in particular to a bending device for the production and processing of copper busbars. Background Technology

[0002] The copper busbar, officially known as the hard copper busbar, model number TMY, is a solid rectangular cross-section copper conductor. For simplicity, it is simply called a "copper busbar" in the industry. The copper busbar is formed into a U-shape by two 90° bends in the same direction. It is often used in production to accommodate the winding installation of through-type current transformers, and is also used as a space avoidance structure for the busbar and grounding busbar of capacitor banks. The U-shape can achieve obstacle avoidance within the limited cabinet depth, while increasing the creepage distance between different phases. It is a common structure for low-voltage metering cabinets and capacitor banks.

[0003] Based on existing technology, it has been found that U-shaped copper busbars cannot be formed in a single process. This is because when two bends are formed simultaneously, the springback on both sides will couple and superimpose the deviations, ultimately resulting in non-parallel sides of the U-shape, a bottom angle deviating from 90°, and excessive internal width dimensions. Since U-shaped busbars are often used for current transformer core installation and circuit breaker terminal connections, dimensional deviations will directly lead to assembly failure, poor contact surface fit, and excessive contact resistance. To avoid the precision limitations of single-process forming, the industry currently generally uses a step-by-step, two-stage bending process to process U-shaped copper busbars. However, this process requires two clamping and positioning operations and step-by-step bending, resulting in numerous steps, a long processing cycle, and low overall production efficiency, making it difficult to meet the demands of large-volume, fast-paced production of complete sets of power distribution equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a bending device for the production and processing of copper busbars, so as to solve the problems mentioned in the background art.

[0005] The technical solution of this invention is: a bending device for copper busbar production and processing, comprising a base plate, a top plate, and a fixed module. The top plate is located directly above the base plate, and a supporting structure is connected between the top plate and the base plate. The fixed module is fixed to the base plate, and a first right-angled groove and a second right-angled groove are formed on the top of the fixed module, which are arranged adjacent to each other. A third limiting plate is fixed on both sides of the fixed module, and a first limiting plate and a second limiting plate are fixed at both ends of the fixed module, respectively. The first right-angled groove is arranged adjacent to the first limiting plate, and the second right-angled groove is located away from the first limiting plate. The top plate has a first right-angle pressure head and a second right-angle pressure head at its bottom, and the first right-angle pressure head and the second right-angle pressure head are respectively aligned with the first right-angle groove and the second right-angle groove. The top plate has a first moving component that moves the first right-angle pressure head downward and a second moving component that moves the second right-angle pressure head downward. The outer side of the fixed module has an arc groove, which is located between the first right-angle groove and the first limiting plate. An arc block is movably embedded inside the arc groove. The second moving plate has a driving structure that makes the arc block slide out of the arc groove.

[0006] Preferably, the support structure includes four columns, one end of each of the four columns is fixed at one of the four corners of the base plate, and the other end of each of the four columns is fixed at one of the four corners of the top.

[0007] Preferably, the top of the second limiting plate is higher than the top of the first limiting plate, and the side of the second limiting plate facing the first limiting plate has an arc surface, while the top of the third limiting plate has an inclined surface.

[0008] Preferably, the first moving component includes a first hydraulic rod and a first moving plate. The first hydraulic rod is fixed to the top plate, and the telescopic end of the first hydraulic rod is fixed to the first moving plate. The first moving plate is fixed to the first right-angle pressure head.

[0009] Preferably, a plurality of first guide posts are fixed on the outer side of the first movable plate, and each of the first guide posts is slidably inserted into the top plate.

[0010] Preferably, the second moving component includes a second hydraulic rod and a second moving plate. The second hydraulic rod is fixed to the top plate, and the telescopic end of the second hydraulic rod is fixed to the second moving plate. The second moving plate is fixed to the second right-angle pressure head.

[0011] Preferably, a plurality of second guide posts are fixed on the outer side of the second movable plate, and each of the second guide posts is slidably inserted into the top plate.

[0012] Preferably, one end of the arc block has a semi-circular cross-section.

[0013] Preferably, the drive structure includes two fixed shafts and two rotating plates. One end of each of the two fixed shafts is fixed to a fixed module, and one end of each of the two rotating plates is provided with a rotating hole. The two fixed shafts are rotatably installed in the two rotating holes, and the other ends of the two rotating plates are fixed to the two ends of the arc block.

[0014] Preferably, the drive structure further includes a square rod, a toothed plate, a gear, and a return spring. The gear is fixed to one of the rotating plates and is coaxially arranged with the fixed shaft. One end of the square rod is fixed to the second moving plate. The toothed plate is slidably sleeved on the square rod. The return spring is sleeved on the square rod. Both ends of the return spring are fixed to the toothed plate and the second moving plate, respectively. The toothed plate meshes with the gear.

[0015] The present invention provides an improved bending device for copper busbar production and processing, which, compared with the prior art, has the following improvements and advantages:

[0016] Firstly, this invention integrates two bending stations onto the same fixed module, and with two independently controlled right-angle pressure heads and moving components, all bending processes of the U-shaped busbar can be completed on a single machine without the need to transfer workpieces across stations, which helps to reduce the overall space occupied by the equipment and reduce the auxiliary time generated by workpiece transfer; at the same time, it is equipped with multiple sets of limiting plates and movable arc block structures, which can automatically complete the secondary positioning of the workpiece during the bending process, reducing the amount of manual repeated positioning adjustments. Secondly, the device of the present invention adopts a dual-pressure head structure with independent step-by-step driving. The pressing parameters of the two bending processes can be adjusted separately, which can adapt to the bending processing requirements of copper busbars of different specifications and thicknesses. This helps to improve the forming consistency of U-shaped bending and alleviate the dimensional deviation problem caused by springback coupling.

[0017] Thirdly, the drive structure uses the downward force of the second pressure head to synchronously realize the pushing action of the arc block, without the need for additional independent drive components. While simplifying the overall structure of the device, it can make the positioning action and bending action form a natural timing coordination, which helps to improve the coordination of equipment operation and reduce the manufacturing cost and maintenance difficulty of the equipment. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention; Figure 2 for Figure 1 A magnified structural diagram at point A; Figure 3 This is a schematic diagram of the overall second-view three-dimensional structure of the present invention; Figure 4 for Figure 3 A magnified structural diagram at point B; Figure 5 This is a schematic diagram of the overall third-view three-dimensional structure of the present invention; Figure 6 This is a schematic diagram of the first working state structure of the present invention; Figure 7 This is a schematic diagram of the second working state structure of the present invention; Figure 8 This is a schematic diagram of the third working state structure of the present invention; Figure 9 This is a schematic diagram of the fourth working state structure of the present invention; Figure 10 This is a schematic diagram of the fifth working state structure of the present invention.

[0020] Figure label: 1. Base plate; 2. Column; 3. Top plate; 4. First guide column; 5. First hydraulic rod; 6. Second hydraulic rod; 7. Second guide column; 8. First moving plate; 9. Second moving plate; 10. First right-angle pressure head; 11. Second right-angle pressure head; 12. Fixed module; 13. Rotating plate; 14. Fixed shaft; 15. Gear; 16. Gear plate; 17. Square rod; 18. Return spring; 19. Arc groove; 20. First right-angle groove; 21. Second right-angle groove; 22. First limiting plate; 23. Second limiting plate; 24. Third limiting plate; 25. Inclined surface; 26. Arc surface; 27. Arc block. Detailed Implementation

[0021] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] This invention provides an improved bending device for copper busbar production and processing. The technical solution of this invention is as follows: like Figures 1 to 10As shown, this embodiment of the invention provides a bending device for copper busbar production and processing, including a base plate 1, a top plate 3, and a fixed module 12. The top plate 3 is located directly above the base plate 1, and a supporting structure is connected between the top plate 3 and the base plate 1. The fixed module 12 is fixed to the base plate 1, and a first right-angle groove 20 and a second right-angle groove 21 are formed on the top of the fixed module 12. The first right-angle groove 20 and the second right-angle groove 21 are arranged adjacent to each other. A third limiting plate 24 is fixed on both sides of the fixed module 12, and a first limiting plate 22 and a second limiting plate 23 are fixed at both ends of the fixed module 12, respectively. The first right-angle groove 20 is arranged adjacent to the first limiting plate 22, and the second right-angle groove 21 is located away from the second limiting plate 23. 3. The bottom of the top plate 3 is provided with a first right-angle pressure head 10 and a second right-angle pressure head 11, and the first right-angle pressure head 10 and the second right-angle pressure head 11 are respectively aligned with the first right-angle groove 20 and the second right-angle groove 21. The top plate 3 is provided with a first moving component that moves the first right-angle pressure head 10 downward, and the top plate 3 is provided with a second moving component that moves the second right-angle pressure head 11 downward. The outer side of the fixed module 12 is provided with an arc groove 19, and the arc groove 19 is located between the first right-angle groove 20 and the first limiting plate 22 and the second right-angle groove 21. An arc block 27 is movably embedded inside the arc groove 19. The second moving plate 9 is provided with a driving structure that makes the arc block 27 slide out of the arc groove 19.

[0023] As can be seen from the above, by integrating the two bending stations onto the same fixed module 12, and with the assistance of two independently controlled right-angle pressure heads and moving components, the entire bending process of the U-shaped busbar can be completed within a single machine. This eliminates the need to transfer workpieces across stations, which helps to reduce the overall space occupied by the equipment and reduce the auxiliary time caused by workpiece transfer. At the same time, the addition of multiple sets of limiting plates and movable arc blocks 27 structures can automatically complete the secondary positioning of the workpiece during the bending process, reducing the amount of manual repeated positioning adjustments.

[0024] Specifically, the support structure includes four columns 2, one end of each column 2 is fixed at one of the four corners of the base plate 1, and the other end of each column 2 is fixed at one of the four corners of the top plate 3.

[0025] As can be seen from the above, by using a four-column support structure to connect the bottom plate 1 and the top plate 3, the bending reaction force borne by the top plate 3 can be evenly distributed to four support points, maintaining the stability of the overall structure when the pressure head is pressed down, improving the deformation of the top plate 3 during the bending operation. At the same time, the four-column structure is easier to process and assemble, which facilitates the production, assembly and later maintenance of the equipment.

[0026] Specifically, the top of the second limiting plate 23 is higher than the top of the first limiting plate 22, and the side of the second limiting plate 23 facing the first limiting plate 22 is provided with an arc surface 26, and the top of the third limiting plate 24 is provided with an inclined surface 25.

[0027] As can be seen from the above, setting the second limiting plate 23 to a higher height and matching it with an arc transition surface can provide reliable lateral limiting and guiding effects when the long end of the copper busbar flips up due to gravity, guiding the long end of the workpiece to smoothly fit into the limiting reference surface, reducing the probability of deviation and jamming during the workpiece lifting process, and helping to improve the positioning effect before the secondary bending; the inclined surface 25 at the top of the third limiting plate 24 can form a guiding guide when the workpiece is placed and flipped, reducing the hard collision between the edge of the workpiece and the top of the limiting plate, reducing the risk of the workpiece surface being scratched, and improving the smoothness of loading and unloading operations.

[0028] Specifically, the first moving component includes a first hydraulic rod 5 and a first moving plate 8. The first hydraulic rod 5 is fixed to the top plate 3, and the telescopic end of the first hydraulic rod 5 is fixed to the first moving plate 8. The first moving plate 8 is fixed to the first right-angle pressure head 10.

[0029] As can be seen from the above, the drive system using a hydraulic rod and a moving plate can provide a stable downward pressure, adapting to the bending requirements of copper busbars of different thicknesses. At the same time, the moving plate can serve as the installation reference for the pressure head, facilitating the disassembly, replacement, and position adjustment of the pressure head, thereby improving the device's adaptability to workpieces of different specifications.

[0030] Specifically, a plurality of first guide posts 4 are fixed on the outer side of the first movable plate 8, and each first guide post 4 is slidably inserted into the top plate 3.

[0031] As can be seen from the above, the guide column structure on the first moving plate 8 can provide guidance and constraint for the up and down movement of the moving plate, reduce lateral offset during the pressing process of the pressure head, improve the alignment effect of the right angle pressure head and the right angle groove, and help improve the consistency of the bending angle.

[0032] Specifically, the second moving component includes a second hydraulic rod 6 and a second moving plate 9. The second hydraulic rod 6 is fixed to the top plate 3, and the telescopic end of the second hydraulic rod 6 is fixed to the second moving plate 9. The second moving plate 9 is fixed to the second right-angle pressure head 11.

[0033] As can be seen from the above, by setting an independent second moving component to drive the second right-angle pressure head 11, independent control of the two-step bending action can be realized. The pressing stroke and pressing speed of the two processes can be adjusted separately, which makes it convenient to set corresponding process parameters according to the bending requirements of different workpieces and improve the process adaptability range of the device.

[0034] Specifically, a plurality of second guide posts 7 are fixed on the outer side of the second movable plate 9, and each second guide post 7 is slidably inserted into the top plate 3.

[0035] As can be seen from the above, the guide column structure provided with the second moving plate 9 can constrain the movement trajectory of the second right-angle pressure head 11, reduce the amount of shaking during the pressing process, improve the forming quality of the second bend, and at the same time reduce the lateral load on the hydraulic rod and extend the service life of the drive components.

[0036] Specifically, one end of the arc block 27 has a semi-circular cross-section.

[0037] As can be seen from the above, setting the end of the arc block 27 to a semi-circular cross section can ensure a smooth transition when the arc block 27 contacts the side of the copper busbar, disperse contact stress, avoid scratching the copper busbar surface plating during the pushing process, and help protect the surface quality and conductivity of the workpiece.

[0038] Specifically, the drive structure includes two fixed shafts 14 and two rotating plates 13. One end of each of the two fixed shafts 14 is fixed on the fixed module 12. One end of each of the two rotating plates 13 is provided with a rotating hole. The two fixed shafts 14 are rotatably installed in the two rotating holes respectively. The other ends of the two rotating plates 13 are fixed on both ends of the arc block 27 respectively.

[0039] As can be seen from the above, the rotary support structure composed of fixed shaft 14 and rotating plate 13 can make the arc block 27 slide out and retract smoothly along the arc trajectory, making the movement process smoother. At the same time, the synchronous support at both ends can make the arc block 27 bear the force evenly, improve the stability during the pushing process, and reduce the workpiece displacement caused by unilateral force.

[0040] Specifically, the drive structure also includes a square rod 17, a toothed plate 16, a gear 15, and a return spring 18. The gear 15 is fixed to one of the rotating plates 13 and is coaxially arranged with the fixed shaft 14. One end of the square rod 17 is fixed to the second moving plate 9. The toothed plate 16 is slidably sleeved on the square rod 17. The return spring 18 is sleeved on the square rod 17. Both ends of the return spring 18 are fixed to the toothed plate 16 and the second moving plate 9, respectively. The toothed plate 16 meshes with the gear 15.

[0041] As can be seen from the above, by using the transmission form of toothed plate 16 and gear 15 in conjunction with the return spring 18, the arc block 27 can be driven to slide out synchronously by the downward movement force of the second moving plate 9, without the need for additional independent driving components, thus simplifying the power system of the device; at the same time, the spring buffer structure can automatically adapt to the remaining stroke after the arc block 27 is pushed into place, avoiding damage to components caused by hard contact, so that the pushing action of the arc block 27 and the pressing action of the pressure head form a natural timing coordination.

[0042] Working principle: Before the operation begins, the straight copper busbar to be bent is placed steadily on the top surface of the fixed module 12 along the inclined surface 25 of the top of the third limiting plate 24, so that the two sides of the workpiece are against the inner side of the two third limiting plates 24, and the end of the workpiece is against the side of the first limiting plate 22, thus completing the initial positioning before the first bend. After the first moving component is activated, the telescopic end of the first hydraulic rod 5 extends, pushing the first moving plate 8 to move the first right-angle pressure head 10 vertically downwards in sync. The first right-angle pressure head 10 applies downward pressure to the copper busbar at the position of the first right-angle groove 20, pressing the corresponding part of the copper busbar into the first right-angle groove 20, so that the copper busbar forms the first 90° bend at this point. At this time, the copper busbar is bent into an L-shape, with a shorter folded edge on the side closer to the first limiting plate 22 and a longer straight edge on the other side. After the first bend is completed, the first hydraulic rod 5 retracts, driving the first right-angle pressure head 10 to reset upwards, no longer forming a pressing constraint on the workpiece. Since the weight of the long side of the L-shaped workpiece is significantly greater than that of the short side, the long side will naturally droop downwards under the action of gravity, causing the short side to tilt upwards, so that the bent part is separated from the first right-angle groove 20, and the workpiece as a whole flips and tilts to one side of the second limiting plate 23; during the flipping process, the inclined surface 25 of the third limiting plate 24 can provide lateral guidance to the workpiece, avoiding hard collision between the edge of the workpiece and the edge of the limiting plate, and ensuring a smooth flipping process. Then the second moving component is activated, the telescopic end of the second hydraulic rod 6 extends, pushing the second moving plate 9 to drive the second right-angle pressure head 11 to move downward; at the same time, the square rod 17 fixed on the side of the second moving plate 9 moves downward, driving the toothed plate 16 sleeved on the square rod 17 to move downward synchronously. Through the meshing transmission between the toothed plate 16 and the gear 15, the gear 15 is driven to rotate around the axis of the fixed shaft 14, thereby driving the rotating plate 13 and the arc block 27 to slide outward from the arc groove 19 along the arc trajectory. The outwardly sliding arc block 27 will abut against the side of the already formed bent section of the copper busbar, applying a horizontal pushing force in the direction of the second limiting plate 23, pushing the long side of the copper busbar to abut against the arc surface 26 of the second limiting plate 23, completing the automatic positioning before the second bend; when the arc block 27 pushes the workpiece into place, if the second moving plate 9 continues to move down, the toothed plate 16 will compress the return spring 18 and slide along the square rod 17 to avoid forced transmission causing workpiece deformation or component damage; Then the second right-angle pressure head 11 continues to move down, aligning with the position of the second right-angle groove 21 and pressing the corresponding part of the copper busbar into the groove, completing the second 90° bend, and finally processing the U-shaped copper busbar. After all the bends are completed, the second hydraulic rod 6 retracts and drives the second right-angle pressure head 11 to return to its original position. The square rod 17 and the toothed plate 16 move upward synchronously, driving the gear 15 to rotate in the opposite direction. The arc block 27 then retracts into the arc groove 19. At this time, the processed U-shaped copper busbar workpiece can be taken out along the inclined surface 25 of the third limiting plate 24.

[0043] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bending device for copper busbar production and processing, comprising a base plate (1), a top plate (3), and a fixed module (12), characterized in that: The top plate (3) is located directly above the bottom plate (1), and the top plate (3) and the bottom plate (1) are connected by a common support structure. The fixed module (12) is fixed to the bottom plate (1), and the top of the fixed module (12) is provided with a first right-angle groove (20) and a second right-angle groove (21). The first right-angle groove (20) and the second right-angle groove (21) are arranged adjacent to each other. The fixed module (12) is fixed with a third limiting plate (24) on both sides, and the fixed module (12) is fixed with a first limiting plate (22) and a second limiting plate (23) at both ends. The first right-angle groove (20) is arranged adjacent to the first limiting plate (22), and the second right-angle groove (21) is away from the second limiting plate (23). The bottom of the top plate (3) is provided with a first right-angle groove (20). An angled pressure head (10) and a second right-angled pressure head (11) are provided, and the first right-angled pressure head (10) and the second right-angled pressure head (11) are respectively aligned with the first right-angled groove (20) and the second right-angled groove (21). The top plate (3) is provided with a first moving component that moves the first right-angled pressure head (10) downward. The top plate (3) is provided with a second moving component that moves the second right-angled pressure head (11) downward. The outer side of the fixed module (12) is provided with an arc groove (19), and the arc groove (19) is located between the first right-angled groove (20) and the first limiting plate (22). An arc block (27) is movably embedded inside the arc groove (19). The second moving plate (9) is provided with a driving structure that makes the arc block (27) slide out of the arc groove (19).

2. The bending device for copper busbar production and processing according to claim 1, characterized in that: The support structure includes four columns (2), one end of each column (2) is fixed at one of the four corners of the base plate (1), and the other end of each column (2) is fixed at one of the four corners of the top.

3. The bending device for copper busbar production and processing according to claim 1, characterized in that: The top of the second limiting plate (23) is higher than the top of the first limiting plate (22), and the side of the second limiting plate (23) facing the first limiting plate (22) is provided with an arc surface (26), and the top of the third limiting plate (24) is provided with a slope (25).

4. The bending device for copper busbar production and processing according to claim 1, characterized in that: The first moving component includes a first hydraulic rod (5) and a first moving plate (8). The first hydraulic rod (5) is fixed to the top plate (3), and the telescopic end of the first hydraulic rod (5) is fixed to the first moving plate (8). The first moving plate (8) is fixed to the first right-angle pressure head (10).

5. A bending device for copper busbar production and processing according to claim 4, characterized in that: Multiple first guide posts (4) are fixed on the outer side of the first movable plate (8), and each first guide post (4) is slidably inserted into the top plate (3).

6. The bending device for copper busbar production and processing according to claim 1, characterized in that: The second moving component includes a second hydraulic rod (6) and a second moving plate (9). The second hydraulic rod (6) is fixed to the top plate (3), and the telescopic end of the second hydraulic rod (6) is fixed to the second moving plate (9). The second moving plate (9) is fixed to the second right-angle pressure head (11).

7. A bending device for copper busbar production and processing according to claim 6, characterized in that: Multiple second guide posts (7) are fixed on the outer side of the second movable plate (9), and each second guide post (7) is slidably inserted into the top plate (3).

8. A bending device for copper busbar production and processing according to claim 7, characterized in that: One end of the arc block (27) has a semi-circular cross-section.

9. A bending device for copper busbar production and processing according to claim 6, characterized in that: The drive structure includes two fixed shafts (14) and two rotating plates (13). One end of each of the two fixed shafts (14) is fixed on a fixed module (12). One end of each of the two rotating plates (13) is provided with a rotating hole. The two fixed shafts (14) are rotatably installed in the two rotating holes respectively. The other end of each of the two rotating plates (13) is fixed on both ends of an arc block (27).

10. A bending device for copper busbar production and processing according to claim 9, characterized in that: The drive structure also includes a square rod (17), a toothed plate (16), a gear (15), and a return spring (18). The gear (15) is fixed to one of the rotating plates (13). The gear (15) is coaxially arranged with the fixed shaft (14). One end of the square rod (17) is fixed to the second moving plate (9). The toothed plate (16) is slidably sleeved on the square rod (17). The return spring (18) is sleeved on the square rod (17). The two ends of the return spring (18) are fixed to the toothed plate (16) and the second moving plate (9), respectively. The toothed plate (16) meshes with the gear (15).

Images