A copper soft connection welding production line and a welding method

Abstract

The application belongs to the technical field of welding, and specifically provides a copper soft connection welding production line and a welding method. The copper soft connection welding production line comprises a track, a copper foil blanking device, an anti-oxidation piece blanking device, a fixing device, a limiting tool, a moving device, a high polymer diffusion welding machine and a transfer device. The limiting tool, the copper foil blanking device and the anti-oxidation piece blanking device can realize automatic stacking of multiple copper foils and anti-oxidation pieces. The copper foils and the anti-oxidation pieces are temporarily fixed by the fixing device, which helps to ensure the position accuracy of the multiple copper foils and the anti-oxidation pieces during high polymer diffusion welding. The high polymer diffusion welding machine can directly weld the anti-oxidation pieces on both sides of the copper foils. Compared with the method of forming an anti-oxidation layer through electroplating, the strength is higher and the anti-oxidation layer is not easy to be damaged, which helps to improve the product quality and the reliability of the work. The workpieces are automatically transferred between multiple workstations through the movable limiting tool and the transfer device, and the degree of automation is high.

Description

Technical Field

[0001] This invention belongs to the field of welding technology, specifically relating to a copper flexible connector welding production line and welding method. Background Technology

[0002] Copper flexible connectors are commonly used for connections in electrical equipment such as transformers, switchgear, and generators, and are also applied in industries such as new energy vehicles, substations, and explosion-proof switches for mining. The manufacturing process of copper flexible connectors mainly includes cutting, welding, and stamping. During production, copper foil is first cut into suitable blocks or strips. Then, multiple pieces of copper foil are neatly stacked together, and the copper foil at both ends is welded together using a polymer diffusion welding machine. Finally, mounting holes are formed at both ends by stamping or drilling.

[0003] To prevent oxidation of the copper flexible connector surface, existing technology, Chinese Patent Publication No. CN105575471A, entitled "Copper Strip Flexible Connector and Its Forming Production Line," discloses a process for forming a protective layer by silver plating at both ends of the copper flexible connector. Specifically, it includes a polymer diffusion welding machine, a punching device, and an electroplating silver device. The polymer diffusion welding machine is equipped with a heating and pressure welding fixture with a fixing groove matching the end of the copper strip flexible connector. The punching device includes a punch press and a stamping die. The stamping die is placed on the worktable of the punch press, below the punch, and has a blanking hole matching the bolt connection hole on the end of the copper strip flexible connector. The electroplating silver device includes an electrolyte tank and a pure silver plate, with the end of the copper strip flexible connector acting as the cathode and the pure silver plate acting as the anode, inserted into the electrolyte tank. The shortcomings of the above-mentioned prior art are: the anti-oxidation layer formed by electroplating is relatively thin and easily damaged; the electroplating operation requires manual labor, resulting in a low degree of automation. Summary of the Invention

[0004] This invention provides a copper flexible connector welding production line and welding method, aiming to solve the problems of easy damage to the oxide layer and low degree of automation in the prior art when an anti-oxidation layer is formed by electroplating.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a copper flexible connector welding production line, comprising a track, a copper foil feeding device, an anti-oxidation sheet feeding device and a fixing device respectively disposed on one side of the track, a limiting fixture disposed on the track, a moving device for driving the limiting fixture to move along the track, a polymer diffusion welding machine, and a transfer device.

[0007] The copper foil cutting device is used to cut the strip of copper foil into sheets, and the anti-oxidation sheet cutting device is used to cut the strip of anti-oxidation sheet into sheets.

[0008] The limiting fixture includes a mounting base and a material box. The mounting base is slidably disposed on the track. The top of the material box is open, and through clearance holes are respectively opened on both sides of the bottom of the material box.

[0009] Two fixing devices are provided and are arranged opposite each other on both sides of the track. Each fixing device has two working ends, upper and lower. When the limiting fixture moves to the working position of the fixing device, the upper and lower working ends correspond to the clearance hole. The working ends are used to connect multiple copper foils and anti-oxidation material sheets into one piece.

[0010] Two polymer diffusion welding machines are provided and are positioned opposite each other on the unloading side of the track. The transfer device is used to transfer the workpiece located on the fixed device to the polymer diffusion welding machine.

[0011] In one possible implementation, the copper foil feeding device includes:

[0012] A feeding reel is located on one side of the track, and a coil of copper foil is mounted on the feeding reel;

[0013] A feeding assembly, disposed between the unloading reel and the track, is used to feed copper foil onto the track; and

[0014] A cutting component is located on one side of the feeding component adjacent to the track, and is used to cut copper foil of a preset length.

[0015] In one possible implementation, the material box is square, and the material box has a feeding port on the side adjacent to the copper foil feeding device; the side of the material box away from the copper foil feeding device is hinged to the mounting base, and the limiting fixture also includes a flipping mechanism, which is disposed on the mounting base and is used to drive the material box to rotate around the hinge axis. When the copper foil feeding device is working, the material box is located on the discharge side of the cutting assembly and tilts downward along the conveying direction of the copper foil.

[0016] In one possible implementation, the anti-oxidation sheet feeding device is located between the copper foil feeding device and the fixing device.

[0017] In one possible implementation, the fixing device is a resistance welding machine, and when the material box is in the working position of the resistance welding machine, the upper and lower electrodes of the resistance welding machine correspond to the clearance hole respectively.

[0018] In one possible implementation, the transfer device includes:

[0019] A crossbeam, disposed between the two polymer diffusion welding machines, and having a groove arranged parallel to the length direction of the track; and

[0020] A clamping assembly is movably disposed in the slide groove, the clamping assembly being used to transfer the workpiece from the working position of the fixing device to the working position of the polymer diffusion welding machine.

[0021] In one possible implementation, the gripping component includes:

[0022] A connecting plate, the top of which has a slider that mates with the slide groove, the length direction of the connecting plate being perpendicular to the length direction of the slide groove;

[0023] At least two suction cup robotic arms are respectively located at both ends of the connecting plate; and

[0024] A gripping robotic arm is located in the middle of the connecting plate.

[0025] In one possible implementation, the gripping robot includes two telescopic rods disposed opposite each other on both sides of the connecting plate, and clamping plates respectively connected to the ends of the two telescopic rods. The two clamping plates are respectively provided with limiting grooves for accommodating workpieces on their opposite sides, and a clamping space for clamping workpieces is formed between the two limiting grooves.

[0026] In one possible implementation, the copper flexible connector welding production line further includes a cooling water tank located on the unloading side of the polymer diffusion welding machine, and the cooling water tank is equipped with a conveying device.

[0027] Compared with the prior art, the beneficial effects of the copper flexible connector welding production line provided by the present invention are:

[0028] The copper flexible connector welding production line provided by this invention includes a track, a copper foil feeding device, an anti-oxidation sheet feeding device, a fixing device, a limiting fixture, a moving device, a polymer diffusion welder, and a transfer device. During operation, the limiting fixture moves along the track, receiving the copper foil and anti-oxidation sheet through a material box, ensuring the copper foil and anti-oxidation sheet are neatly stacked within the box, with two anti-oxidation sheets located at the bottom and top of the copper foil, respectively. The limiting fixture then moves to the working position of the fixing device, which securely connects the copper foil and anti-oxidation sheet together, facilitating gripping and placement by the transfer device. Finally, the transfer device places the joined workpiece onto the polymer diffusion welder, which performs polymer diffusion welding on both ends of the copper foil and anti-oxidation sheet to obtain the copper flexible connector product.

[0029] This invention achieves automatic stacking of multiple copper foils and anti-oxidation sheets through limiting fixtures, a copper foil feeding device, and an anti-oxidation sheet feeding device. A fixing device temporarily secures the copper foils and anti-oxidation sheets, helping to ensure accurate positioning of multiple copper foils and anti-oxidation sheets during polymer diffusion welding. The polymer diffusion welding machine can directly weld the anti-oxidation sheets to both sides of the copper foil, resulting in higher strength and less damage compared to forming the anti-oxidation layer through electroplating, thus improving product quality and operational reliability. The movable limiting fixtures and transfer devices enable automatic transfer of workpieces between multiple workstations, achieving a high degree of automation, ensuring production efficiency, and saving labor and time costs.

[0030] Secondly, the present invention provides a copper flexible connector welding method, which, using any of the above-described implementations, comprises a copper flexible connector welding production line and includes the following steps:

[0031] The control limit fixture moves to the discharge side of the anti-oxidation sheet feeding device, and the anti-oxidation sheet is fed through the anti-oxidation sheet feeding device and falls to the bottom of the material box;

[0032] The control limit fixture moves to the discharge side of the copper foil feeding device, and the copper foil feeding device feeds a specified number of copper foils. The copper foils fall into the material box in sequence and are located above the anti-oxidation material sheet.

[0033] The control limit fixture moves to the discharge side of the anti-oxidation sheet feeding device, and the anti-oxidation sheet is obtained by feeding through the anti-oxidation sheet feeding device. The anti-oxidation sheet falls into the material box and is located above multiple copper foils.

[0034] The control limit fixture moves to the working position of the fixing device. The two fixing devices are used to connect multiple copper foils and anti-oxidation material sheets into one piece. The fixing device is a resistance welding machine. The welding position of the resistance welding machine is the position where the mounting holes need to be machined at both ends of the workpiece.

[0035] The workpiece located on the fixed device is transferred to the polymer diffusion welding machine by the transfer device, and the two ends of the workpiece are welded by the two polymer diffusion welding machines respectively.

[0036] After the welded workpiece has cooled, mounting holes are machined on the workpiece by stamping or drilling.

[0037] The copper flexible connector welding method provided by this invention is implemented using the aforementioned copper flexible connector welding production line and has the same technical effects, which will not be elaborated here. Attached Figure Description

[0038] Figure 1 A schematic diagram of a copper flexible connector welding production line provided in an embodiment of the present invention. Figure 1 ;

[0039] Figure 2 A schematic diagram of a copper flexible connector welding production line provided in an embodiment of the present invention. Figure 2 ;

[0040] Figure 3 This is a schematic diagram of the copper foil feeding device and the limiting fixture in an embodiment of the present invention;

[0041] Figure 4 A schematic diagram of a copper flexible connector welding production line provided in an embodiment of the present invention. Figure 3 ;

[0042] Figure 5 A cross-sectional view of a copper flexible connector welding production line at the working position of a fixed device, provided in an embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the limiting tooling in an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the transfer device in an embodiment of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] 10. Track; 20. Copper foil feeding device; 21. Feeding reel; 22. Feeding assembly; 23. Cutting assembly; 30. Anti-oxidation sheet feeding device; 40. Fixing device; 41. Working end; 50. Limiting fixture; 51. Mounting base; 52. Material box; 521. Feed inlet; 522. Clearance hole; 53. Tilting mechanism; 60. Moving device; 70. Polymer diffusion welding machine; 80. Transfer device; 81. Crossbeam; 82. Clamping assembly; 821. Connecting plate; 822. Suction cup robot; 823. Grasping robot; 8231. Telescopic rod; 8232. Clamping plate; 8233. Limiting groove; 90. Cooling water tank; 91. Conveying device; 100. Workpiece. Detailed Implementation

[0047] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0048] Please refer to the following: Figures 1 to 7 The following describes a copper flexible connector welding production line and welding method provided by the present invention.

[0049] Please see Figures 1 to 7In a first aspect, embodiments of the present invention provide a copper flexible connector welding production line, including a track 10, a copper foil feeding device 20, an anti-oxidation sheet feeding device 30, and a fixing device 40 respectively disposed on one side of the track 10, a limiting fixture 50 disposed on the track 10, a moving device 60 for driving the limiting fixture 50 to move along the track 10, a polymer diffusion welding machine 70, and a transfer device 80. The copper foil feeding device 20 is used to cut strip-shaped copper foil into sheets, and the anti-oxidation sheet feeding device 30 is used to cut strip-shaped anti-oxidation sheets into sheets. The limiting fixture 50 includes a mounting base 51 and a material box 52. The mounting base 51 is slidably disposed on the track 10, the top of the material box 52 is open, and through clearance holes 522 are respectively opened on both sides of the bottom of the material box 52. Two fixing devices 40 are provided and are positioned opposite each other on both sides of the track 10. Each fixing device 40 has two working ends 41. When the limiting fixture 50 moves to the working position of the fixing device 40, the two working ends 41 correspond to the clearance hole 522. The working ends 41 are used to connect multiple copper foils and anti-oxidation sheets into one piece. The fixing device 40 can be a press, resistance welding machine, etc., which can temporarily fix multiple copper foils and two anti-oxidation sheets into one piece under pressure or welding, so that the transfer device 80 can transfer them to the polymer diffusion welding machine 70. Two polymer diffusion welding machines 70 are provided and are positioned opposite each other on the unloading side of the track 10. The transfer device 80 is used to transfer the workpiece (100) located on the fixing device 40 to the polymer diffusion welding machine 70.

[0050] Compared with the prior art, the beneficial effects of the copper flexible connector welding production line provided in this embodiment of the invention are:

[0051] The copper flexible connector welding production line provided in this embodiment of the invention includes a track 10, a copper foil feeding device 20, an anti-oxidation sheet feeding device 30, a fixing device 40, a limiting fixture 50, a moving device 60, a polymer diffusion welder 70, and a transfer device 80. During operation, the limiting fixture 50 moves along the track 10, receiving the copper foil and anti-oxidation sheet through a material box 52, ensuring the copper foil and anti-oxidation sheet are neatly stacked within the material box 52, with the two anti-oxidation sheets located at the bottom and top of the copper foil, respectively. Subsequently, the limiting fixture 50 moves to the working position of the fixing device 40, using the fixing device 40 to fix and connect the copper foil and anti-oxidation sheet together, facilitating the transfer device 80 to grasp and place them. Finally, the transfer device 80 places the connected workpiece (100) onto the polymer diffusion welder 70, which performs polymer diffusion welding on both ends of the copper foil and anti-oxidation sheet to obtain the copper flexible connector product.

[0052] This invention achieves automatic stacking of multiple copper foils and anti-oxidation sheets through a limiting fixture 50, a copper foil feeding device 20, and an anti-oxidation sheet feeding device 30. A fixing device 40 temporarily fixes the copper foils and anti-oxidation sheets, helping to ensure the positional accuracy of multiple copper foils and anti-oxidation sheets during polymer diffusion welding. The polymer diffusion welding machine 70 can directly weld the anti-oxidation sheets onto both sides of the copper foil. Compared with the method of forming an anti-oxidation layer through electroplating, this method has higher strength, is less prone to damage, and helps improve product quality and operational reliability. The movable limiting fixture 50 and transfer device 80 enable automatic transfer of the workpiece (100) between multiple workstations, resulting in a high degree of automation, guaranteed production efficiency, and savings in labor and time costs.

[0053] The copper foil cutting device 20 is used to cut rolled copper foil strips to suitable lengths, and the anti-oxidation sheet cutting device 30 is used to cut rolled anti-oxidation strips to suitable lengths. The anti-oxidation sheet can be a common metal material that can serve as an anti-oxidation layer, such as nickel or silver. Both the copper foil cutting device 20 and the anti-oxidation sheet cutting device 30 can be directly selected from existing metal strip cutting devices on the market, without specific restrictions on their specifications or models.

[0054] The limiting fixture 50 includes a material box 52 and a mounting base 51. The mounting base 51 can move along the track 10. The material box 52 is mounted on the mounting base 51 and is used to hold the cut anti-oxidation sheets and copper foils. The limiting fixture 50 is driven by the moving device 60 to move between the anti-oxidation sheet feeding device 30 and the copper foil feeding device 20, so that they are neatly stacked in a top-to-bottom order of anti-oxidation sheets, multiple copper foils, and anti-oxidation sheets. The moving device 60 can be a power device such as a hydraulic cylinder, electric push rod, or gear and rack mechanism that can achieve linear reciprocating movement, which is set along the track 10.

[0055] After the copper foil and anti-oxidation sheet are cut, as follows Figure 5 As shown, the control limit fixture 50 moves to the working position of the fixing device 40, aligning the clearance hole 522 with the upper and lower working ends 41 of the fixing device 40. The fixing device 40 can connect multiple copper foils and anti-oxidation sheets into a single workpiece (100) through extrusion, welding, or other methods, facilitating the transfer device 80 to grasp and transfer it. The transfer device 80 can be an existing transfer device such as a robotic arm. To prevent the extruded / welded portion from affecting the performance of the copper flexible connector, the extruded / welded portion can correspond to the position of the mounting hole to be processed later, and its size is smaller than the diameter of the mounting hole.

[0056] Two polymer diffusion welding machines 70 are used to weld the two ends of copper foil respectively. The polymer diffusion welding machines 70 can be selected directly from existing products on the market, and there are no specific restrictions on their specifications and models. Users can choose according to their own needs.

[0057] Please see Figures 1 to 3 In some possible embodiments, the copper foil feeding device 20 or the anti-oxidation sheet feeding device 30 includes a feeding reel 21, a feeding assembly 22, and a cutting assembly 23. The feeding reel 21 is located on one side of the track 10, and a roll of copper foil or an anti-oxidation sheet (such as silver foil or nickel foil) is provided on the feeding reel 21; the feeding assembly 22 is located between the feeding reel 21 and the track 10, and is used to feed copper foil to the track 10; the cutting assembly 23 is located on one side of the feeding assembly 22 adjacent to the track 10, and is used to cut copper foil of a preset length.

[0058] The feeding assembly 22 may include multiple sets of conveying rollers arranged along the conveying direction. Each set includes upper and lower conveying rollers. During operation, the material belt passes between the conveying rollers. The conveying rollers are driven by a motor to rotate, and the conveying rollers drive the material belt to the cutting assembly 23. The cutting assembly 23 cuts the continuous material belt with a cutter to obtain material pieces of appropriate length. When the cutting assembly 23 is working, the material box 52 is located on the unloading side of the cutting assembly 23, and the cut material pieces can fall into the material box 52.

[0059] Please see Figure 5 and Figure 6 In some possible embodiments, the material box 52 is square, and the material box 52 has a feed port 521 on the side adjacent to the copper foil feeding device 20; the side of the material box 52 away from the copper foil feeding device 20 is hinged to the mounting base 51. The limiting fixture 50 also includes a flipping mechanism 53, which is located on the mounting base 51 and is used to drive the material box 52 to rotate around the hinge axis. When the copper foil feeding device 20 is working, the material box 52 is located on the discharge side of the cutting component 23 and tilts downward along the copper foil conveying direction.

[0060] In this embodiment, the material box 52 is driven to rotate by the flipping mechanism 53. When used to receive the cut material sheets, the material box 52 is tilted, with the inlet 521 aligned with the outlet side of the cutting component 23. The material sheets can enter the material box 52 from the inlet 521 and slide down the tilted material box 52 to the lowest end under the action of gravity, aligning the ends of multiple copper foils and anti-oxidation material sheets. After the material feeding is completed, the flipping mechanism 53 drives the material box 52 to slowly return to a horizontal position, and the moving device 60 drives the limiting fixture 50 to the working position of the fixing device 40. The two working ends 41 of the fixing device 40 are close to each other vertically, and multiple material sheets are connected as one unit through the clearance hole 522 and the top opening of the material box 52. Optionally, the tilt angle of the material box 52 can be set between 5° and 30°.

[0061] Please see Figure 1 , Figure 2 and Figure 4In some possible embodiments, the anti-oxidation sheet feeding device 30 is located between the copper foil feeding device 20 and the fixing device 40. When the empty material box 52 is moved from the fixing device 40 to the copper foil feeding device 20, the anti-oxidation sheet feeding device 30 cuts an anti-oxidation sheet, which falls to the bottom of the material box 52. After the copper foil feeding is completed, when the material box 52 is moved from the copper foil feeding device 20 to the fixing device 40, the anti-oxidation sheet feeding device 30 cuts another anti-oxidation sheet, which is placed on top of the copper foil. In this embodiment, the anti-oxidation sheet feeding device 30 is located between the copper foil feeding device 20 and the fixing device 40, which is a reasonable arrangement and can improve the feeding efficiency.

[0062] Please see Figure 5 In some possible embodiments, the fixing device 40 is a resistance welding machine. When the material box 52 is in the working position of the resistance welding machine, the upper and lower electrodes of the resistance welding machine correspond to the clearance holes 522, respectively. The upper and lower electrodes of the resistance welding machine are the upper and lower working ends 41, respectively. The electrodes are usually cylindrical electrodes, and the diameter of the electrodes is less than or equal to the diameter of the mounting holes to be machined later. When the material sheets to be welded (copper foil and anti-oxidation sheet) are located between the two electrodes, the lifting column drives the upper electrode to move downward, and the lifting base drives the lower electrode to move upward. The two electrodes approach each other, and the copper foil and anti-oxidation sheet are connected into one piece by resistance welding.

[0063] Please see Figure 1 , Figure 2 and Figure 7 In some possible embodiments, the transfer device 80 includes a crossbeam 81 and a clamping assembly 82. The crossbeam 81 is disposed between the two polymer diffusion welders 70 and has a groove arranged parallel to the length direction of the track 10; the clamping assembly 82 is movably disposed in the groove and is used to transfer the workpiece (100) from the working position of the fixing device 40 to the working position of the polymer diffusion welder 70. The clamping assembly 82 can be raised and lowered by means of a hydraulic cylinder, an electric telescopic rod, etc., to adjust the clamping height.

[0064] Please see Figure 1 , Figure 2 and Figure 7 In some possible embodiments, the gripping assembly 82 includes a connecting plate 821, a suction cup manipulator 822, and a grasping manipulator 823. The top of the connecting plate 821 has a slider that mates with a groove, and the length direction of the connecting plate 821 is perpendicular to the length direction of the groove; at least two suction cup manipulators 822 are respectively disposed at both ends of the connecting plate 821, and the suction cup manipulators 822 are connected to an air pump through gas hoses; the grasping manipulator 823 is disposed in the middle of the connecting plate 821.

[0065] The suction cup robot 822 is used to pick up the workpiece from the top opening of the material box 52 and then place it in the working position of the polymer diffusion welding machine 70. Since the temperature of the material sheet after polymer diffusion welding is high, it can no longer be picked up by the suction cup robot 822. Therefore, after the polymer diffusion welding is completed, the gripping robot 823 is used to pick up the welded workpiece and transfer it to the subsequent station, such as the cooling station or the stamping station.

[0066] Please see Figure 7 In some possible embodiments, the gripping robot 823 includes two telescopic rods 8231 disposed opposite each other on both sides of the connecting plate 821, and clamping plates 8232 respectively connected to the ends of the two telescopic rods 8231. Each clamping plate 8232 has a limiting groove 8233 on one side facing each other for accommodating a workpiece. A clamping space for clamping the workpiece is formed between the two limiting grooves 8233. After the suction cup robot 822 picks up the workpiece, the height of the two limiting grooves 8233 aligns with the height of the workpiece, and the two telescopic rods 8231 move synchronously, driving the two clamping plates 8232 to move closer together, thus clamping the middle of the workpiece. The telescopic rods 8231 can be electric telescopic rods, telescopic cylinders, hydraulic push rods, etc.

[0067] Understandably, during polymer diffusion welding, the suction cup robot 822 is in an upward posture and does not contact the workpiece 100. The clamping robot is in a clamping posture and can support the workpiece 100, ensuring that the position of the workpiece 100 remains unchanged during welding.

[0068] Please see Figure 1 and Figure 2 In some possible embodiments, a copper flexible connector welding production line further includes a cooling water tank 90, located on the unloading side of the polymer diffusion welding machine 70. A conveying device 91 is installed within the cooling water tank 90. ​​After welding, the workpiece is transferred above the cooling water tank 90 via a clamping assembly 82. A gripping robot 823 releases the workpiece, which falls into the cooling water tank 90 below for cooling. After cooling, the workpiece is conveyed to subsequent processes via the conveying device 91. The conveying device 91 can be a chain conveyor or other conveying equipment.

[0069] Secondly, the present invention provides a copper flexible connector welding method, employing a copper flexible connector welding production line provided in any of the above embodiments, comprising the following steps: controlling the limiting fixture 50 to move to the discharge side of the anti-oxidation sheet feeding device 30, obtaining an anti-oxidation sheet through the anti-oxidation sheet feeding device 30, and causing the anti-oxidation sheet to fall to the bottom of the material box 52; controlling the limiting fixture 50 to move to the discharge side of the copper foil feeding device 20, obtaining a specified number of multiple copper foils through the copper foil feeding device 20, the multiple copper foils falling sequentially into the material box 52 and positioned above the anti-oxidation sheet; controlling the limiting fixture 50 to move to the discharge side of the anti-oxidation sheet feeding device 30, obtaining an anti-oxidation sheet through the anti-oxidation sheet feeding device 30. Oxidized sheet and anti-oxidation sheet fall into the material box 52 and are located above multiple copper foils; the control limit fixture 50 moves to the working position of the fixing device 40. The two fixing devices 40 are used to connect the multiple copper foils and anti-oxidation sheets into one piece. The fixing device 40 is a resistance welding machine. The welding position of the resistance welding machine is the position where mounting holes need to be machined at both ends of the workpiece; the workpiece located at the fixing device 40 is transferred to the polymer diffusion welding machine 70 by the transfer device 80. The two polymer diffusion welding machines 70 are used to weld the two ends of the workpiece respectively; after the welded workpiece cools down, mounting holes are machined on the workpiece by punching or drilling. When machining the mounting holes, the resistance welded part can be removed, which will not affect the flexible connection product.

[0070] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present invention specification has recorded each combined embodiment and can support different combined embodiments.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A copper flexible connector welding production line, characterized in that, It includes a track (10), a copper foil feeding device (20), an anti-oxidation sheet feeding device (30) and a fixing device (40) respectively disposed on one side of the track (10), a limiting fixture (50) disposed on the track (10), a moving device (60) for driving the limiting fixture (50) to move along the track (10), a polymer diffusion welding machine (70), and a transfer device (80); The copper foil cutting device (20) is used to cut the strip of copper foil into sheets, and the anti-oxidation sheet cutting device (30) is used to cut the strip of anti-oxidation sheet into sheets. The limiting fixture (50) includes a mounting base (51) and a material box (52). The mounting base (51) is slidably disposed on the track (10). The top of the material box (52) is open, and through clearance holes (522) are respectively opened on both sides of the bottom of the material box (52). Two fixing devices (40) are provided and are positioned opposite each other on both sides of the track (10). Each fixing device (40) has two working ends (41). When the limiting fixture (50) moves to the working position of the fixing device (40), the two working ends (41) correspond to the clearance hole (522). The working ends (41) are used to connect multiple copper foils and anti-oxidation sheets into one piece. Two polymer diffusion welding machines (70) are provided and are positioned opposite each other on the unloading side of the track (10). The transfer device (80) is used to transfer the workpiece (100) located on the fixing device (40) to the polymer diffusion welding machine (70).

2. The copper flexible connector welding production line according to claim 1, characterized in that, The copper foil feeding device (20) includes: A feeding reel (21) is located on one side of the track (10), and a copper foil roll is provided on the feeding reel (21); A feeding assembly (22), disposed between the unloading reel (21) and the track (10), is used to feed copper foil to the track (10); and A cutting component (23) is provided on one side of the feeding component (22) adjacent to the track (10) for cutting copper foil of a preset length.

3. The copper flexible connector welding production line according to claim 2, characterized in that, The material box (52) is square, and the material box (52) has a feed port (521) on the side adjacent to the copper foil feeding device (20); the side of the material box (52) away from the copper foil feeding device (20) is hinged to the mounting base (51), and the limiting fixture (50) also includes a flipping mechanism (53), which is located on the mounting base (51) and is used to drive the material box (52) to rotate around the hinge axis. When the copper foil feeding device (20) is working, the material box (52) is located on the discharge side of the cutting component (23) and tilts downward along the conveying direction of the copper foil.

4. A copper flexible connector welding production line according to claim 1 or 3, characterized in that, The anti-oxidation sheet feeding device (30) is located between the copper foil feeding device (20) and the fixing device (40).

5. A copper flexible connector welding production line according to claim 1, characterized in that, The fixing device (40) is a resistance welding machine. When the material box (52) is in the working position of the resistance welding machine, the upper and lower electrodes of the resistance welding machine correspond to the clearance hole (522) respectively.

6. The copper flexible connector welding production line according to claim 1, characterized in that, The transfer device (80) includes: A crossbeam (81), disposed between the two polymer diffusion welders (70), and having a groove arranged parallel to the length direction of the track (10); and A clamping assembly (82) is movably disposed in the slide groove, the clamping assembly (82) being used to transfer the workpiece (100) from the working position of the fixing device (40) to the working position of the polymer diffusion welding machine (70).

7. A copper flexible connector welding production line according to claim 6, characterized in that, The clamping assembly (82) includes: A connecting plate (821) has a slider at its top that mates with the slide groove, and the length direction of the connecting plate (821) is perpendicular to the length direction of the slide groove. At least two suction cup manipulators (822) are respectively located at both ends of the connecting plate (821); and a gripping manipulator (823) is located in the middle of the connecting plate (821).

8. A copper flexible connector welding production line according to claim 7, characterized in that, The gripping manipulator (823) includes two telescopic rods (8231) disposed opposite to each other on both sides of the connecting plate (821), and clamping plates (8232) respectively connected to the ends of the two telescopic rods (8231). The two clamping plates (8232) are respectively provided with limiting grooves (8233) for accommodating workpieces (100) on their opposite sides, and a clamping space for clamping workpieces (100) is formed between the two limiting grooves (8233).

9. A copper flexible connector welding production line according to claim 7, characterized in that, The copper flexible connector welding production line also includes a cooling water tank (90), which is located on the unloading side of the polymer diffusion welding machine (70), and a conveying device (91) is provided in the cooling water tank (90).

10. A method for welding copper flexible connectors, characterized in that, The copper flexible connector welding production line according to any one of claims 1-9 includes the following steps: The control limit fixture (50) moves to the discharge side of the anti-oxidation sheet feeding device (30), and the anti-oxidation sheet is obtained by feeding through the anti-oxidation sheet feeding device (30) and the anti-oxidation sheet falls to the bottom of the material box (52); The control limit fixture (50) moves to the discharge side of the copper foil feeding device (20), and the copper foil feeding device (20) feeds a specified number of copper foils. The copper foils fall into the material box (52) in sequence and are located above the anti-oxidation material sheet. The control limit fixture (50) moves to the discharge side of the anti-oxidation sheet feeding device (30), and the anti-oxidation sheet is obtained by feeding through the anti-oxidation sheet feeding device (30). The anti-oxidation sheet falls into the material box (52) and is located above multiple copper foils. The control limit fixture (50) moves to the working position of the fixing device (40). The two fixing devices (40) are used to connect multiple copper foils and anti-oxidation sheets into one piece. The fixing device (40) is a resistance welding machine. The welding position of the resistance welding machine is the position where the mounting holes need to be machined at both ends of the workpiece (100). The workpiece (100) located on the fixing device (40) is transferred to the polymer diffusion welding machine (70) by the transfer device (80), and the two ends of the workpiece (100) are welded by the two polymer diffusion welding machines (70) respectively. After the workpiece (100) is cooled by the polymer diffusion welding machine (70), mounting holes are machined on the workpiece (100) by stamping or drilling.

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