Welding strip bending device of photovoltaic series welding machine

Abstract

The utility model relates to a welding strip bending device of a photovoltaic series welding machine. The welding strip bending device is provided with a working platform and a rack, a lower pressing block is arranged on the working platform, a hydraulic cylinder is arranged on the machine frame, an upper pressing block is fixedly arranged at the telescopic end of the hydraulic cylinder, pressing steps are arranged on the upper pressing block and the lower pressing block, pressing blocks are arranged on the pressing steps, a cutter is arranged on the side edge of the upper pressing block, and a side edge pressing block is fixedly arranged on the side edge of the lower pressing block. A cutter withdrawal groove corresponding to the cutter is formed in the side edge pressing block, an adjusting assembly is arranged on the upper pressing block and / or the lower pressing block, the adjusting assembly comprises an adjusting inner cavity, an adjusting screw rod, an adjusting part, an adjusting sliding block, an adjusting screw hole and a plurality of connecting rods, and the distance between the pressing blocks is adjusted through horizontal movement. The upper pressing block is driven by the hydraulic cylinder to press and bend the welding strip extending between the upper pressing block and the lower pressing block, and the upper pressing block cuts off the welding strip along with downward pressing of the upper pressing block on a cutter for pressing and bending the welding strip. The device is ingenious in structure, convenient and practical.

Description

Technical Field

[0001] This utility model relates to the field of welding strip processing for photovoltaic string welding machines, and in particular to a welding strip bending device for photovoltaic string welding machines. Background Technology

[0002] Solder ribbon is a strip-shaped material used in welding processes. Photovoltaic solder ribbon is a key component in photovoltaic modules, connecting the solar cells. It primarily serves as a conductive connection point and enhances module power. Solder ribbon is typically supported by a metal material and coated with a tin alloy layer, which acts as a filler material in the welding process to ensure weld quality and strength. In the photovoltaic field, solder ribbon is the electrical connection component between solar cells in a module. By connecting cells in series or parallel, it conducts and transmits the electrical energy converted from sunlight to the equipment, while also serving a role in heat dissipation and mechanical support.

[0003] The existing tooling cannot guarantee the length of the welding strip after bending. When the length exceeds the distance between the cells, the bending point is on the cell. During lamination, the machine applies pressure, and the cell is squeezed by the bending point of the welding strip, which increases the rate of microcracks or cell breakage in the module and reduces the finished product qualification rate. This increases the rework rate and labor intensity. At the same time, the rework and adjustment of the bending effect takes a long time, which greatly affects the overall production efficiency and is very inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide a welding strip bending device for a photovoltaic string welding machine. The device has an ingenious structure and can adjust the spacing of each pressure block in a timely manner according to the actual spacing of the solar cells. This ensures that the bending point of the welding strip will not squeeze the solar cells, thus avoiding microcracks or breakage of the solar cells and improving the overall production efficiency. It is highly efficient and convenient.

[0005] The technical solution to achieve the purpose of this utility model is as follows: This utility model has a working platform and a frame mounted on the working platform; a lower pressing block is provided on the working platform, a hydraulic cylinder is provided on the frame, an upper pressing block is fixedly provided on the telescopic end of the hydraulic cylinder, both the upper and lower pressing blocks are provided with pressing steps, the pressing steps on the upper and lower pressing blocks are centrally symmetrically arranged, each pressing step is provided with a pressing block with a cross-section of a right trapezoid, the side of the upper pressing block is provided with a cutter that can cut off the rear end of the welding strip, the side of the lower pressing block is fixedly provided with a side pressing block, the side pressing block is provided with a retraction groove corresponding to the cutter, the upper pressing block and / or the lower pressing block are provided with an adjustment component for adjusting the spacing between each pressing block, the adjustment component includes components disposed on the upper pressing block and / or the lower pressing block. The pressure block has an adjusting cavity, an adjusting screw rotatably disposed within the adjusting cavity, an adjusting part integrally formed with the adjusting screw and disposed on the outside of the upper and / or lower pressure blocks, an adjusting slider slidably disposed within the adjusting cavity, an adjusting screw hole disposed on the adjusting slider and adapted to the adjusting screw, and multiple connecting rods disposed on the adjusting slider. Each adjusting slider slides horizontally within the adjusting cavity through the driving of the adjusting screw by the adjusting part and the threaded engagement of the adjusting screw and the adjusting screw hole, and drives each pressure block to move horizontally through the connecting rods. The spacing of each pressure block is adjusted by the horizontal movement. The upper pressure block is driven by a hydraulic cylinder to press and bend the welding strip extending between the upper and lower pressure blocks. The cutting blade of the upper pressure block cuts the welding strip as the upper pressure block presses down.

[0006] Furthermore, the aforementioned adjusting slider is provided with multiple connecting inner holes corresponding to each connecting rod. One end of each connecting rod is rotatably connected to the corresponding connecting inner hole. Each connecting rod is fitted with a torsion spring, with both ends of the torsion spring acting on the connecting rod and the connecting inner hole respectively. The other end of each connecting rod extends out of the adjusting inner cavity and is rotatably connected to the pressure block. Two limiting blocks are provided on the end of each connecting rod away from the torsion spring. The pressure block is provided with connecting outer holes corresponding to each connecting rod. The opening of each connecting outer hole has two holes that are coaxial and integrally formed with the connecting outer hole. The curved baffles are not connected to each other. Each curved baffle forms a through hole for the connecting rod to pass through and a limiting slot for each limiting block to pass through. Each connecting rod extends into the connecting inner hole after the limiting block passes through the corresponding limiting slot. After passing through the limiting slot, each limiting block is misaligned with the limiting slot by the continuous force of the torsion spring and presses against the inner wall of the curved baffle. The pressing block forms a detachable fixed connection with each pressing block through the insertion and cooperation of each connecting rod with the connecting outer hole and the pressing of the limiting block with the curved baffle.

[0007] Furthermore, the aforementioned frame is also equipped with a pressing cylinder. The telescopic end of the pressing cylinder is fixedly equipped with an upper pressing bracket. The upper pressing bracket is equipped with a drive motor and an upper pressing roller that is rotatably mounted on the upper pressing bracket under the drive of the drive motor. The lower pressing block is equipped with a lower pressing bracket, and the lower pressing bracket is equipped with a lower pressing roller. The lower pressing roller is equipped with multiple limiting ring grooves coaxially arranged with the lower pressing roller. The upper pressing roller presses the welding strip in each limiting ring groove by driving the upper pressing cylinder, and drives each welding strip to feed by driving the drive motor.

[0008] Furthermore, the aforementioned cutter is positioned between the upper pressing bracket and the upper pressing block. The upper pressing block is equipped with a cutting cylinder, and a limiting cutter rod is fixedly mounted on the telescopic end of the cutting cylinder. The cutter is fixedly mounted on the limiting cutter rod at the end away from the cutting cylinder. The upper pressing block is equipped with a limiting block, which has a through hole through which the limiting cutter rod can pass. Below the limiting block, there is also a limiting pressure block for pressing the welding strip. The limiting pressure block has a through groove through which the limiting cutter rod and the cutter can pass. The limiting pressure block presses the welding strip by the downward pressure of the upper pressing block, and the cutter cuts the pressed welding strip by the drive of the cutting cylinder.

[0009] Furthermore, the aforementioned frame is also equipped with a material handling assembly for removing the bent welding strips. The material handling assembly includes a positioning mounting plate fixed on the frame, a material handling motor fixed on the positioning mounting plate, a material handling slider slidably mounted on the positioning mounting plate under the drive of the material handling motor, a material handling cylinder fixed on the material handling slider, a material handling bracket fixed on the material handling cylinder, and multiple vacuum suction heads mounted on the material handling bracket. The positioning mounting plate is provided with parallel bottom slide rails, and the material handling slider is provided with bottom sliders adapted to each bottom slide rail. The material handling slider is slidably connected to the positioning mounting plate by the drive of the material handling motor and the cooperation between each bottom slider and the bottom slide rail. Each vacuum suction head removes the bent welding strips by the drive of the material handling slider and the drive of the material handling bracket by the material handling cylinder.

[0010] This utility model has positive effects: (1) This utility model sets a lower pressure block on the working platform and a hydraulic cylinder on the frame. The hydraulic cylinder drives the upper pressure block to press the lower pressure block. Before pressing, the operator can rotate the adjustment part to drive the adjustment screw to rotate. The adjustment screw drives the adjustment slider to slide in the adjustment cavity. Each adjustment slider slides horizontally in the adjustment cavity through the adjustment part driving the adjustment screw and the threaded cooperation between the adjustment screw and the adjustment screw hole. Each connecting rod drives each pressing block to move horizontally. Each pressing block adjusts the spacing by moving the horizontal position. Then the welding rod is pressed and cut. This effectively solves the problem of hidden cracks or broken pieces caused to the battery cell when the welding rod exceeds the spacing of the battery cell in the prior art. It effectively ensures the accurate bending of the welding rod, has good adjustability and applicability, and has a clever structure that is stable and practical.

[0011] (2) This utility model sets a connecting inner hole in the adjusting slider, and the two ends of the connecting rod are respectively rotatably set in the connecting inner hole and the connecting outer hole. The connecting rod is rotated by the continuous force of the torsion spring. The rotation of the connecting rod drives the pressure block to connect with the limiting plug. The pressure block forms a detachable fixed connection with each pressure block through the insertion and cooperation of each connecting rod with the connecting outer hole, and the pressure of the limiting plug with the arc baffle. This enables the quick installation and disassembly of the pressure block. It can be used for welding strips with different bending degrees and has good adjustability and applicability.

[0012] (3) This utility model sets a limiting ring groove on the lower pressing roller to limit each welding strip. Then, the upper pressing bracket is driven by the pressing cylinder to press the welding strip, and the welding strip is fed by the drive motor. This effectively ensures stable and efficient feeding of the welding strip, making it stable and practical.

[0013] (4) This utility model uses a limiting pressure block to press the welding strip. After pressing, the cutting cylinder drives the cutting blade to cut the welding strip accurately and efficiently, which is convenient and practical.

[0014] (5) By setting up a material picking component, the material picking slider is slidably connected to the positioning mounting plate by the drive of the material picking motor and the cooperation of each bottom slider and bottom slide rail. Each vacuum suction head picks up the weld strip after bending by the drive of the material picking slider and the drive of the material picking cylinder to the material picking bracket, thereby realizing the fast and stable feeding of the bent weld strip, which is efficient and convenient. Attached Figure Description

[0015] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0016] Figure 1 This is a schematic diagram of the overall structure of a photovoltaic string welding machine strip bending device according to the present invention;

[0017] Figure 2 for Figure 1 Sectional view at point A in the middle;

[0018] Figure 3 This is a cross-sectional view of the overall structure of the adjustment component in this utility model;

[0019] Figure 4 This is a rear view of the pressure block in this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure between the cutting cylinder and the cutting blade in this utility model;

[0021] Figure 6 This is a schematic diagram of the overall structure of the lower pressure roller in this utility model;

[0022] Figure 7 This is a schematic diagram of the overall structure of the material handling component in this utility model;

[0023] The attached figures are labeled as follows:

[0024] Work platform 1, lower pressure block 11, side pressure block 12, knife retraction groove 13, lower pressure roller 14, limit ring groove 141, frame 2, hydraulic cylinder 21, upper pressure block 22, pressure cylinder 23, drive motor 24, upper pressure roller 25, pressure step 3, pressure block 4, connecting outer hole 41, arc-shaped baffle 42, limit slot 43, adjustment assembly 5, adjustment inner cavity 51, adjustment screw 52, ​​adjustment part 53, adjustment slider 54, connecting rod 55, limit insert 551, adjustment screw hole 56, connecting inner hole 57, torsion spring 58, cutter 6, cutting cylinder 61, limit knife rod 62, limit block 63, limit pressure block 64, material picking assembly 7, positioning mounting plate 71, material picking motor 72, material picking slider 73, material picking cylinder 74, material picking bracket 75, vacuum suction head 76, bottom slider 77, bottom slide rail 78. Detailed Implementation

[0025] See Figures 1 to 7This utility model includes a working platform 1 and a frame 2 mounted on the working platform 1. The working platform 1 has a lower pressing block 11, and the frame 2 has a hydraulic cylinder 21. An upper pressing block 22 is fixedly mounted on the telescopic end of the hydraulic cylinder 21. Both the upper pressing block 22 and the lower pressing block 11 have pressing steps 3, which are centrally symmetrically arranged. Each pressing step 3 has a pressing block 4 with a right-angled trapezoidal cross-section. The side of the upper pressing block 22 has a cutter 6 for cutting off the rear end of the welding strip. The side of the lower pressing block 11 has a side pressing block 12, which has a retraction groove 13 corresponding to the cutter 6. The upper pressing block 22 and / or the lower pressing block 11 have an adjusting assembly 5 for adjusting the spacing between the pressing blocks 4. The adjusting assembly 5 includes an adjusting inner cavity 51 mounted on the upper pressing block 22 and / or the lower pressing block 11. The system includes a rotating adjusting screw 52 located within the adjusting cavity 51, an adjusting part 53 located outside the upper pressure block 22 and / or the lower pressure block 11 and integrally formed with the adjusting screw 52, ​​an adjusting slider 54 slidably located within the adjusting cavity 51, an adjusting screw hole 56 located on the adjusting slider 54 and adapted to the adjusting screw 52, ​​and multiple connecting rods 55 located on the adjusting slider 54. Each adjusting slider 54 slides horizontally within the adjusting cavity 51 via the driving of the adjusting screw 52 by the adjusting part 53 and the threaded engagement between the adjusting screw 52 and the adjusting screw hole 56. It also drives each pressure block 4 to move horizontally via the connecting rods 55. The spacing of each pressure block 4 is adjusted by the horizontal movement. The upper pressure block 22 is driven by the hydraulic cylinder 21 to press and bend the welding strip that extends between the upper pressure block 22 and the lower pressure block 11. The cutting blade 6 of the upper pressure block 22 cuts the welding strip as the upper pressure block 22 presses down.

[0026] The adjusting slider 54 is provided with multiple connecting inner holes 57 corresponding to each connecting rod 55. One end of each connecting rod 55 is rotatably connected to the corresponding connecting inner hole 57. Each connecting rod 55 is fitted with a torsion spring 58, the two ends of which act on the connecting rod 55 and the connecting inner hole 57 respectively. The other end of each connecting rod 55 extends out of the adjusting inner cavity 51 and is rotatably connected to the pressure block 4. Each connecting rod 55 has two limiting blocks 551 at the end away from the torsion spring 58. The pressure block 4 is provided with connecting outer holes 41 corresponding to each connecting rod 55. The opening of each connecting outer hole 41 is provided with two arc-shaped baffles that are coaxial with the connecting outer hole 41 and integrally formed. 42. The arc-shaped baffles 42 are not connected to each other. Each arc-shaped baffle 42 forms a through hole through which the connecting rod 55 can pass and a limiting slot 43 through which each limiting block 551 can pass. After each limiting block 551 passes through the corresponding limiting slot 43, each connecting rod 55 extends into the connecting inner hole 57. After each limiting block 551 passes through the limiting slot 43, it is misaligned with the limiting slot 43 by the continuous force of the torsion spring 58 and presses against the inner wall of the arc-shaped baffle 42. The pressing block 4 forms a detachable fixed connection with each pressing block 4 through the insertion and cooperation of each connecting rod 55 with the connecting outer hole 41 and the pressing of the limiting block 551 with the arc-shaped baffle 42.

[0027] The frame 2 is also equipped with a pressing cylinder 23. The telescopic end of the pressing cylinder 23 is fixedly equipped with an upper pressing bracket. The upper pressing bracket is equipped with a drive motor 24 and an upper pressing roller 25 that is rotatably mounted on the upper pressing bracket under the drive of the drive motor 24. The lower pressing block 11 is equipped with a lower pressing bracket and a lower pressing roller 14. The lower pressing roller 14 is equipped with a plurality of limiting ring grooves 141 coaxially arranged with the lower pressing roller 14. The upper pressing roller 25 presses the welding strip in each limiting ring groove 141 by driving the upper pressing cylinder 23, and drives each welding strip to feed by driving the drive motor 24.

[0028] The cutter 6 is positioned between the upper pressing bracket and the upper pressing block 22. The upper pressing block 22 is equipped with a cutting cylinder 61. A limiting blade 62 is fixedly mounted on the telescopic end of the cutting cylinder 61. The cutter 6 is fixedly mounted on the end of the limiting blade 62 away from the cutting cylinder 61. The upper pressing block 22 is equipped with a limiting block 63. The limiting block 63 has a through hole through which the limiting blade 62 can pass. Below the limiting block 63, there is also a limiting pressure block 64 for pressing the welding strip. The limiting pressure block 64 has a through groove through which the limiting blade 62 and the cutter 6 can pass. The limiting pressure block 64 presses the welding strip by the downward pressure of the upper pressing block 22. The cutter 6 cuts the pressed welding strip by the drive of the cutting cylinder 61.

[0029] The frame 2 is also equipped with a material handling assembly 7 for removing the bent welding strip. The material handling assembly 7 includes a positioning mounting plate 71 fixed on the frame 2, a material handling motor 72 fixed on the positioning mounting plate 71, a material handling slider 73 slidably disposed on the positioning mounting plate 71 under the drive of the material handling motor 72, a material handling cylinder 74 fixed on the material handling slider 73, a material handling bracket 75 fixed on the material handling cylinder 74, and a plurality of vacuum suction heads 76 disposed on the material handling bracket 75. The positioning mounting plate 71 is provided with parallel bottom slide rails 78. The material handling slider 73 is provided with bottom sliders 77 adapted to each bottom slide rail 78. The material handling slider 73 is slidably connected to the positioning mounting plate 71 by the drive of the material handling motor 72 and the cooperation of each bottom slider 77 and bottom slide rail 78. Each vacuum suction head 76 is driven by the material handling slider 73 and the material handling bracket 75 driven by the material handling cylinder 74 to pick up each bent welding strip.

[0030] The working principle of this utility model is as follows: During the processing of each welding strip, the operator first places each welding strip in the limiting ring groove 141 of the lower pressing roller 14. The upper pressing bracket presses each welding strip by the driving of the pressing cylinder 23. At the same time, the drive motor 24 drives the upper pressing roller 25, thereby driving each welding strip to feed. Simultaneously, the pressing blocks 4 on the upper pressing block 22 and the lower pressing block 11 are adjusted according to the actual spacing and inclination of the welding strip to be bent. The spacing of each pressing block 4 is adjusted, and the pressing... During the installation of block 4, each connecting rod 55 and the limiting insert 551 on the connecting rod 55 pass through the limiting slot 43 and connect into the outer hole 41. At the same time, each torsion spring 58 continuously applies force to the connecting rod 55, thereby causing the limiting insert 551 to be misaligned with the limiting slot 43, so that each limiting insert 551 presses against the inner wall of each arc-shaped baffle 42, thus realizing the installation of each pressing block 4. After installation, the operator can rotate the adjusting part 53, which drives the adjusting screw 52 to rotate. Each adjusting slider 54 adjusts through the adjusting part 53. The adjusting screw 52 is driven by the screw thread engaging with the adjusting screw hole 56, allowing it to slide horizontally within the adjusting cavity 51. Each connecting rod 55 drives the pressing blocks 4 to move horizontally, adjusting their spacing. The upper pressing block 22, driven by the hydraulic cylinder 21, presses and bends the welding strip extending between the upper pressing block 22 and the lower pressing block 11. Then, the limiting pressing block 64 moves downwards under the pressure of the upper pressing block 22, pressing against the welding strip. The cutting cylinder 61 drives the cutter 6 to press down and cut the welding strip. After the welding strip is cut, the material picking slider 73 is slidably connected to the positioning mounting plate 71 by the drive of the material picking motor 72 and the cooperation of each bottom slider 77 and bottom slide rail 78. Each vacuum suction head 76 picks up the welding strip after bending by the drive of the material picking slider 73 and the drive of the material picking cylinder 74 to the material picking bracket 75. On the one hand, it effectively solves the problem of hidden cracks or broken pieces of the battery cells caused by the welding strip length exceeding the spacing of the battery cells in the prior art. On the other hand, it can automatically feed, cut, bend and pick up the welding strip. The structure is ingenious, convenient and practical.

[0031] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A photovoltaic string welding machine strip bending device, comprising a working platform and a frame mounted on the working platform; characterized in that: The working platform is equipped with a lower pressing block, and the frame is equipped with a hydraulic cylinder. An upper pressing block is fixedly mounted on the telescopic end of the hydraulic cylinder. Both the upper and lower pressing blocks are provided with pressing steps, which are centrally symmetrically arranged. Each pressing step is equipped with a pressing block with a right-angled trapezoidal cross-section. The side of the upper pressing block is equipped with a cutter capable of cutting off the rear end of the welding strip. The side of the lower pressing block is fixedly equipped with a side pressing block, which has a retraction groove corresponding to the cutter. The upper and / or lower pressing blocks are equipped with an adjustment assembly for adjusting the spacing between the pressing blocks. The adjustment assembly includes an adjustment cavity on the upper and / or lower pressing blocks, and a rotatable adjustment mechanism within the adjustment cavity. The system includes a screw, an adjusting part integrally formed with the adjusting screw and located outside the upper and / or lower pressure blocks, an adjusting slider slidably disposed within the adjusting cavity, an adjusting screw hole adapted to the adjusting screw and located on the adjusting slider, and multiple connecting rods disposed on the adjusting slider. Each adjusting slider slides horizontally within the adjusting cavity via the adjusting part driving the adjusting screw and the threaded engagement between the adjusting screw and the adjusting screw hole. The connecting rods drive each pressure block to move horizontally, and the spacing between each pressure block is adjusted by the horizontal movement. The upper pressure block, driven by a hydraulic cylinder, presses and bends the welding strip extending between the upper and lower pressure blocks. The cutting blade on the upper pressure block cuts the welding strip as it presses and bends the welding strip.

2. The photovoltaic string welding machine strip bending device according to claim 1, characterized in that: The adjusting slider has multiple connecting inner holes corresponding to each connecting rod. One end of each connecting rod is rotatably connected to the corresponding connecting inner hole. Each connecting rod is fitted with a torsion spring, with both ends of the torsion spring acting on the connecting rod and the connecting inner hole, respectively. The other end of each connecting rod extends out of the adjusting cavity and is rotatably connected to the pressure block. Each connecting rod has two limiting blocks at the end away from the torsion spring. The pressure block has connecting outer holes corresponding to each connecting rod. The opening of each connecting outer hole has two arc-shaped stops that are coaxial with and integrally formed with the connecting outer hole. The plate consists of arc-shaped baffles that are not connected to each other. Each arc-shaped baffle forms a through hole through which a connecting rod can pass and a limiting slot through which each limiting block can pass. Each connecting rod extends into the connecting inner hole after each limiting block passes through the corresponding limiting slot. After passing through the limiting slot, each limiting block is misaligned with the limiting slot by the continuous force of the torsion spring and presses against the inner wall of the arc-shaped baffle. The pressing block forms a detachable fixed connection with each pressing block through the insertion and engagement of each connecting rod with the connecting outer hole and the pressing of the limiting block with the arc-shaped baffle.

3. The photovoltaic string welding machine strip bending device according to claim 2, characterized in that: The frame is also equipped with a pressing cylinder. The telescopic end of the pressing cylinder is fixedly equipped with an upper pressing bracket. The upper pressing bracket is equipped with a drive motor and an upper pressing roller that is rotatably mounted on the upper pressing bracket under the drive of the drive motor. The lower pressing block is equipped with a lower pressing bracket, and the lower pressing bracket is equipped with a lower pressing roller. The lower pressing roller is equipped with multiple limiting ring grooves coaxially arranged with the lower pressing roller. The upper pressing roller presses the welding strip in each limiting ring groove by driving the upper pressing cylinder, and drives each welding strip to feed by driving the drive motor.

4. The photovoltaic string welding machine strip bending device according to claim 3, characterized in that: The cutter is positioned between the upper pressing bracket and the upper pressing block. The upper pressing block is equipped with a cutting cylinder, and a limiting cutter rod is fixedly mounted on the telescopic end of the cutting cylinder. The cutter is fixedly mounted on the limiting cutter rod at the end away from the cutting cylinder. The upper pressing block is equipped with a limiting block, which has a through hole through which the limiting cutter rod can pass. Below the limiting block, there is also a limiting pressure block for pressing the welding strip. The limiting pressure block has a through groove through which the limiting cutter rod and the cutter can pass. The limiting pressure block presses the welding strip by the downward pressure of the upper pressing block, and the cutter cuts the pressed welding strip by the drive of the cutting cylinder.

5. The photovoltaic string welding machine strip bending device according to claim 4, characterized in that: The frame is also equipped with a material handling assembly for removing the bent welding strips. The material handling assembly includes a positioning mounting plate fixed on the frame, a material handling motor fixed on the positioning mounting plate, a material handling slider slidably mounted on the positioning mounting plate under the drive of the material handling motor, a material handling cylinder fixed on the material handling slider, a material handling bracket fixed on the material handling cylinder, and multiple vacuum suction heads mounted on the material handling bracket. The positioning mounting plate is provided with parallel bottom slide rails, and the material handling slider is provided with bottom sliders adapted to each bottom slide rail. The material handling slider is slidably connected to the positioning mounting plate by the drive of the material handling motor and the cooperation between each bottom slider and the bottom slide rail. Each vacuum suction head removes the bent welding strips by the drive of the material handling slider and the drive of the material handling bracket by the material handling cylinder.

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