Photovoltaic panel frame automatic welding device and method of use thereof

Abstract

The application discloses a kind of photovoltaic panel frame automatic welding equipment and its using method, belong to photovoltaic panel frame welding technical field.It includes base assembly support frame and the circular column of configuration in the axial position of base assembly support frame surface, and four groups of circumferentially equidistantly arranged servo telescopic rods are fixedly installed on the outer edge surface of circular column, the frame plate clamping frame for fixing the photovoltaic panel frame plate to be welded is assembled on the output end of each servo telescopic rod, servo mechanical arm is assembled in the position of four side angles of base assembly support frame upper surface, driving module is configured on the output end of each servo mechanical arm, by semicircular arc welding module and driving module, it is difficult to solve the problem that welding wire is positioned and fusion is not sufficient caused by narrow welding space of photovoltaic panel frame corner portion, by rotating motion, molten welding wire is controlled to fill the root of bevel, can effectively improve the uniformity and filling sufficiency of corner fusion area.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic panel frame welding technology, and more specifically, to an automatic photovoltaic panel frame welding device and its usage method. Background Technology

[0002] As a key structure protecting the internal cells and glass, the frame of a photovoltaic module is usually formed by cutting four aluminum alloy profiles at a 45-degree angle and then joining them together to form a rectangular frame. The four corners need to be welded to achieve a firm connection. Existing technology generally uses TIG welding equipment to perform fusion welding at the corners. The welding wire is filled into the end face formed by the end joint, and argon gas protection is used at the same time to prevent the aluminum material from oxidizing.

[0003] However, due to the limitations of the profile cross-sectional dimensions of photovoltaic module frames, the width and area of ​​the end face to be welded are extremely limited, restricting the welding operation space. In actual welding operations, existing equipment often struggles to accurately position the welding wire to the root of the bevel due to the narrow space. After the welding wire melts, it mainly relies on gravity and surface tension to passively spread, making it difficult to form a sufficient and uniform fusion area at the root of the bevel. This results in insufficient corner connection strength, directly affecting the structural integrity and sealing performance of the frame. To address these issues, existing technologies have proposed improved solutions to enhance welding accuracy. For example, patent application CN120206115A proposes an auxiliary mechanism for automatic welding of photovoltaic panel frames. Through the cooperation of a first electric push rod, a drive motor, and an auxiliary block, it achieves automatic feeding and assisted assembly of the frame, improving the positioning accuracy and efficiency before welding to a certain extent.

[0004] However, this solution mainly focuses on the pre-welding assembly auxiliary process. Its technical contribution lies in optimizing the clamping and fixing method of the frame profile. It does not involve the improvement of the welding wire feeding method and the molten pool formation mechanism during the welding process. When the welding wire enters the welding end face, its spreading behavior after melting still relies on the traditional passive flow method. Under the condition of limited space at the root of the bevel, it is difficult to ensure that the molten metal fully fills the root of the bevel. There are still technical bottlenecks in improving the corner connection strength. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide an automatic welding equipment for photovoltaic panel frames and its usage method, aiming to solve the above-mentioned technical problems.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] An automatic welding device for photovoltaic panel frames includes a base assembly support frame and a circular column disposed at the axial center of the surface of the base assembly support frame. Four sets of servo telescopic rods arranged equidistantly in a circle are fixedly installed on the outer edge surface of the circular column. Each servo telescopic rod has a frame clamp for fixing the photovoltaic panel frame to be welded assembled at its output end. Servo robotic arms are assembled at the four corners of the upper surface of the base assembly support frame. Each servo robotic arm has a drive module configured at its output end.

[0008] The drive module includes a first servo motor and a semi-circular arc welding module that rotates in conjunction with the first servo motor. The semi-circular arc welding module is C-shaped and moves to the outside of the contact end face of the two sets of photovoltaic panel frame plates to be welded, in conjunction with the adjustment of the servo robotic arm.

[0009] Each of the semi-circular arc welding modules is equipped with a first welding wire replenishment module and an auxiliary welding module for supplying welding wire. The semi-circular arc welding module is driven by the drive module to rotate on the outside of the contact end face of the two sets of photovoltaic panel frame plates to be welded. The welding wire supplied by the first welding wire replenishment module is melted on the contact end face and spread in a circumferential manner in conjunction with the auxiliary welding module.

[0010] As a further aspect of the present invention: a circular frame is assembled on the outer surface of the first servo motor, and is fixedly mounted on the end face of the output end of the servo robotic arm through the circular frame. A gear drive ring is fixedly mounted on the output end of the first servo motor. An extended assembly arm is fixedly mounted on the outer side wall of the first servo motor. A first semi-circular arc-shaped limiting frame is fixedly mounted on the extended assembly arm. The first semi-circular arc-shaped limiting frame is also C-shaped in a semi-circular shape. The semi-circular arc-shaped welding module includes a second semi-circular arc-shaped limiting frame. An external engaging protrusion is fixedly mounted at the middle position of the outer side of the second semi-circular arc-shaped limiting frame. The second semi-circular arc-shaped limiting frame is slidably assembled into the first semi-circular arc-shaped limiting frame through the external engaging protrusion. A first arc-shaped toothed sleeve is fixedly mounted on the edge of the second semi-circular arc-shaped limiting frame near the first semi-circular arc-shaped limiting frame. The first arc-shaped toothed sleeve meshes with the gear drive ring.

[0011] As a further aspect of the present invention: the interior of the second semi-circular arc-shaped limiting frame is a cavity with the same arc-shaped contour, and an inner plate is fixedly connected to both sides of the cavity. A third semi-circular arc-shaped limiting frame with the same arc is fixedly connected to both sides of the cavity of the second semi-circular arc-shaped limiting frame through the inner plate. A second arc-shaped toothed sleeve is fixedly connected to both sides of the outer surface of the third semi-circular arc-shaped limiting frame. A second arc-shaped sliding groove is opened along the arc-shaped contour on both sides of the inner wall of the third semi-circular arc-shaped limiting frame. A second welding wire replenishment module is slidably assembled on the arc edge of the third semi-circular arc-shaped limiting frame through the second arc-shaped sliding groove.

[0012] As a further aspect of the present invention: the second welding wire replenishment module includes a second protective housing. Both sides of the outer surface of the second protective housing are fixedly installed with inserts that fit into the second arc-shaped groove. On the outer surfaces of the two inserts, a first gear block and a second gear block corresponding to meshing with the second arc-shaped toothed sleeve are respectively installed through the second arc-shaped groove. A second servo motor is fixedly installed on one side of the first gear block. A first arc-shaped groove for sliding engagement of the second servo motor is provided on the side of the second semi-circular arc-shaped limiting frame. The output end of the second servo motor is connected to the axis of the first gear block to drive the second protective housing to slide in an arc along the second arc-shaped groove.

[0013] As a further aspect of the present invention: the auxiliary welding module includes bent inserts assembled and connected to the bottom sides of the second protective housing. Each bent insert has a protruding circular perforated plate fixedly connected to it. Each circular perforated plate has a circular perforated area, and the center of the protruding circular perforated plate coincides with the center of the third semi-circular arc-shaped limiting frame. A circularly coiled gas supply hose is fixedly installed on the edge of the circular perforated area of ​​the circular perforated plate. Several spray nozzles are equidistantly provided on the gas supply hose. A gas guide hose is fixedly connected between the two bent inserts to connect the two gas supply hoses in series. An auxiliary assembly rod is fixedly connected to the top of one bent insert. The auxiliary assembly rod is hollow inside to insert the hose to form a delivery channel connecting the gas guide hose and the inert gas supply end.

[0014] As a further aspect of the present invention: the second protective shell is a hollow, racetrack-shaped block structure, and a collar frame is fixedly installed on both sides of the cavity inside the second protective shell. Roller sleeves are movably fitted on the collar frame. The two roller sleeves are arranged parallel to each other and a third gear block that meshes with each other is fixedly installed at both ends. A circular airbag sleeve is fixedly installed at the middle position of the outer surface of the roller sleeve, and a brush ring is pasted on the circular airbag sleeve. A reserved drain port is opened at the middle position of the upper and lower surfaces of the second protective shell.

[0015] As a further aspect of the present invention: the second welding wire replenishment module further includes a liquid supply annular cavity fixedly installed at the middle position of both sides of the inner cavity of the second protective housing. One end of the liquid supply annular cavity extends along the inner wall of the second protective housing to the top side of the roller sleeve, while the other end of the liquid supply annular cavity extends along the inner wall of the second protective housing to the bottom side of the roller sleeve. An open groove is opened on one side of the roller sleeve at the bottom side of the roller sleeve, and the opening of the open groove faces the brush ring side. A liquid replenishment sealing port is provided on the side of the liquid supply annular cavity extending to the top side of the roller sleeve.

[0016] As a further aspect of the present invention: the first welding wire replenishment module includes a first protective housing, which is assembled on top of a second protective housing. A hanger is fixedly installed inside the first protective housing, and a wire feeding sleeve is fixedly connected to the bottom of the hanger. The surface of the wire feeding sleeve has a circular opening facing the reserved feeding port, and a limiting circular opening plate is fixedly installed at the bottom of the wire feeding sleeve. The limiting circular opening plate also has a circular opening facing the reserved feeding port, and a parallel slot is opened on the side of the circular opening. A servo hydraulic rod is fixedly installed in the parallel slot.

[0017] As a further aspect of the present invention: a cutting head is fixedly installed on the output end of the servo hydraulic rod, the cutting head being a circular head capable of closely adhering to the inner wall of the circular opening on the limiting circular plate; a third servo motor is fixedly installed at the top side of the hanger, a wire winding disc is fixedly installed on the output end of the third servo motor, and flux-cored welding wire is wound on the wire winding disc; magnetic ring plates are movably installed on the side of the circular hollow plate; a reserved welding frame for assembling a welding gun is provided on the side of the bent insert plate; and a preheating cylindrical sleeve is assembled on the reserved outlet at the bottom of the second protective housing.

[0018] A method for using an automatic welding equipment for photovoltaic panel frames includes the following steps:

[0019] S1: First, the third servo motor drives the wire winding disc to rotate and release the flux-cored welding wire. The welding wire enters the second protective housing through the wire feeding sleeve and the limiting round mouth plate. The servo hydraulic rod drives the cutting head to cut the welding wire into fixed length sections. The treatment liquid in the liquid supply ring cavity is applied to the surface of the welding wire through the brush ring. The roller sleeves rotate in opposite directions to convey the welding wire downward.

[0020] S2: Then, the welding wire passes through the preheating cylindrical sleeve for preheating. The servo robotic arm moves the drive module and auxiliary welding module to the outside of the contact end face of the two sets of frame plates to be welded, and inserts the end of the welding wire together with the auxiliary welding module between the two corner end faces of the frame.

[0021] S3: Finally, the second servo motor drives the second protective housing to slide 180 degrees along the second arc-shaped slide groove. The welding torch heats and melts the welding wire at the center of the circular hollow plate and spreads it out. Then, the first servo motor drives the second semi-circular arc-shaped limiting frame to rotate 180 degrees along the first semi-circular arc-shaped limiting frame, so that the auxiliary welding module completes the complete coverage of the welding end face.

[0022] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0023] (1) By using a semi-circular arc welding module and a drive module, the problems of difficult wire positioning and insufficient fusion caused by the narrow welding space at the corner of the photovoltaic panel frame are solved. The servo robotic arm moves the semi-circular C-shaped welding module to the outside of the corner, and the first servo motor in the drive module drives the module to rotate along the arc trajectory, so that the welding wire supplied by the first welding wire supplement module can actively spread in a circular manner along the contact end face with the cooperation of the auxiliary welding module. Compared with the existing solution that only optimizes the clamping and positioning, but the welding wire still relies on gravity and surface tension to passively flow after melting, this method uses rotation to control the filling of the root of the bevel with molten welding wire, which can effectively improve the uniformity and filling of the corner fusion area, and lay the foundation for enhancing the connection strength of the frame.

[0024] (2) A double-layer nested arc-shaped sliding structure is adopted. The second welding wire replenishment module is slidably assembled on the third semi-circular arc-shaped limiting frame through the cooperation of the insert and the second arc-shaped sliding groove. The first gear block is driven by the second servo motor to mesh with the second arc-shaped toothed sleeve to realize 180-degree arc-shaped sliding in the front and rear stages. This segmented rotation drive mechanism enables the welding wire output end to fully spread the molten welding material after reaching the corner welding area, ensuring the stability and continuity of the welding wire in the bending trajectory. At the same time, the activation component is used to remove the oxide film on the surface of the aluminum alloy welding wire in advance, which improves the metallurgical reaction conditions of the molten pool and further ensures the consistency of welding quality.

[0025] (3) By uniformly spraying inert protective gas from multiple directions, a surrounding gas protection field is formed in the narrow corner area, which effectively prevents the oxidation of the molten pool. In conjunction with the preheating cylindrical sleeve to preheat the welding wire, not only is surface moisture removed and porosity defects reduced, but the welding heat input is also reduced, which is conducive to controlling the range of the heat-affected zone. At the same time, the servo hydraulic rod in the first welding wire replenishment module works with the cutting head to cut the welding wire into fixed lengths, so that the filling amount of each welding can be precisely controlled, avoiding the fusion quality fluctuation caused by the different extension lengths of the welding wire, and significantly improving the overall structural integrity and long-term sealing reliability of the frame. Attached Figure Description

[0026] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of the servo robotic arm of the present invention;

[0029] Figure 3This is a top view of the servo robotic arm of the present invention;

[0030] Figure 4 This is a schematic diagram of the overall structure of the driving module of the present invention;

[0031] Figure 5 This is a structural schematic diagram of the disassembled state of the semi-circular arc welding module of the present invention;

[0032] Figure 6 This is a partial structural schematic diagram of the auxiliary welding module of the present invention;

[0033] Figure 7 This is a structural schematic diagram of the second welding wire replenishment module of the present invention in a disassembled state;

[0034] Figure 8 This is a structural schematic diagram of the first welding wire replenishment module of the present invention in a disassembled state;

[0035] Figure 9 for Figure 8 A magnified structural diagram at point A in the diagram.

[0036] Figure Labels

[0037] 1. Base assembly bracket frame; 2. Servo telescopic rod; 3. Frame plate clamping bracket; 4. Servo robotic arm;

[0038] 5. Drive module; 51. First servo motor; 52. Gear drive ring; 53. Extended assembly arm; 54. First semi-circular arc-shaped limiting frame;

[0039] 6. Semi-circular arc welding module; 61. Second semi-circular arc limiting frame; 62. External locking protrusion; 63. First arc-shaped toothed sleeve; 64. Inner plate; 65. Third semi-circular arc limiting frame; 66. First arc-shaped slide groove; 67. Second arc-shaped toothed sleeve; 68. Second arc-shaped slide groove; 69. Second servo motor; 610. First gear block; 611. Second gear block;

[0040] 7. First welding wire replenishment module; 71. First protective housing; 72. Hanger; 73. Third servo motor; 74. Wire winding spool; 75. Wire feeding sleeve; 76. Limiting circular plate; 77. Servo hydraulic rod; 78. Cutting head;

[0041] 8. Second welding wire replenishment module; 81. Second protective housing; 82. Insert block; 83. Reserved outlet; 84. Collar frame; 85. Roller sleeve; 86. Third gear block; 87. Circular airbag sleeve; 88. Brush ring; 89. Liquid supply circular cavity; 810. Liquid replenishment sealing port; 811. Open groove;

[0042] 9. Auxiliary welding module; 91. Bent insert plate; 92. Circular hollow plate; 93. Gas delivery hose; 94. Spray nozzle; 95. Magnetic circular plate; 96. Auxiliary assembly rod; 97. Gas guide hose; 98. Reserved welding frame;

[0043] 10. Preheat the cylindrical sleeve.

[0044] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0045] The automatic welding equipment for photovoltaic panel frames and its usage method provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should also be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0046] like Figures 1 to 9 As shown, this embodiment of the invention provides an automatic welding equipment for photovoltaic panel frames, including a base assembly bracket frame 1 and a circular column disposed at the axial position of the surface of the base assembly bracket frame 1. Four sets of servo telescopic rods 2 arranged circumferentially at equal intervals are fixedly installed on the outer edge surface of the circular column. Each servo telescopic rod 2 has a frame plate clamping frame 3 for fixing the photovoltaic panel frame to be welded assembled on its output end. Servo robotic arms 4 are assembled at the four corner positions of the upper surface of the base assembly bracket frame 1. Each servo robotic arm 4 has a drive module 5 configured on its output end.

[0047] The drive module 5 includes a first servo motor 51 and a semi-circular arc welding module 6 that rotates in coordination with the first servo motor 51. The semi-circular arc welding module 6 is C-shaped and moves to the outside of the contact end face of the two sets of photovoltaic panel frame plates to be welded, in coordination with the adjustment of the servo robotic arm 4.

[0048] The semi-circular arc welding module 6 is equipped with a first welding wire replenishment module 7 and an auxiliary welding module 9 for supplying welding wire. The semi-circular arc welding module 6 is driven by the drive module 5 to rotate on the outside of the contact end face of the two sets of photovoltaic panel frame plates to be welded. The welding wire supplied by the first welding wire replenishment module 7 is melted and spread circumferentially on the contact end face in conjunction with the auxiliary welding module 9.

[0049] To address the problem in existing technologies where the narrow welding space at the corners of photovoltaic panel frames makes it difficult to position the wire feed to the root of the bevel, and the molten wire can only passively spread by gravity and surface tension, making it difficult to form a sufficient and uniform fusion area at the root of the bevel, thus affecting the corner connection strength and the overall sealing performance of the frame structure, the above-mentioned technical solution is adopted. The above-mentioned technical solution mainly consists of a base assembly bracket frame 1, a servo telescopic rod 2, a frame plate clamping frame 3, a servo robotic arm 4, a drive module 5, a semi-circular arc welding module 6, a first welding wire replenishment module 7, and an auxiliary welding module 9.

[0050] Specifically, the configured base assembly bracket frame 1 serves as the base of the entire equipment. It adopts a frame structure to ensure overall rigidity and stability. A circular column is fixedly installed at the center of its surface axis. This circular column serves as the axis of the photovoltaic panel frame assembly end. Four sets of servo telescopic rods 2 are fixedly installed on its outer edge surface. These four sets of servo telescopic rods 2 are arranged equidistantly in a circle. The output end of each set of servo telescopic rods 2 extends radially outward toward the circular column, and a frame plate clamping frame 3 is assembled on its output end. The outer frame plate clamping frame 3 is used to fix the photovoltaic panel frame plate to be welded. Through the telescopic drive of the servo telescopic rods 2 used for servo telescopic adjustment in the prior art, the frame plate clamping frame 3 and the frame plate fixed on it can be driven to move radially, thereby realizing the size adjustment and positioning clamping of the rectangular frame pre-assembled by the four frame plates, ensuring that the contact end faces to be welded at the four corners can be accurately aligned. The overall base end is based on the prior art.

[0051] Four sets of servo robotic arms 4 are configured and assembled at the four corners of the upper surface of the base assembly bracket frame 1. Each set of servo robotic arms 4 is a multi-degree-of-freedom industrial robotic arm structure in the prior art, capable of flexible posture adjustment and position movement in three-dimensional space. Each set of servo robotic arms 4 is equipped with a drive module 5 at its output end. This drive module 5 serves as the drive unit for the welding execution end, used to support and drive the semi-circular arc welding module 6 to perform precise welding movements. Specifically, the drive module 5 includes a first servo motor 51 and a semi-circular arc welding module 6. The output shaft of the first servo motor 51 is connected to the semi-circular arc welding module 6 for driving the semi-circular arc welding module 6 to rotate around its own center. The semi-circular arc welding module 6 has a semi-circular C-shaped structure, with the center of its arc contour coinciding with the center of the end face of the photovoltaic panel frame to be welded. During actual operation, the entire drive module 5 and the semi-circular arc welding module 6 are first moved to the outside of the contact end faces of the two sets of photovoltaic panel frame plates to be welded, and the arc contour of the semi-circular arc welding module 6 is aligned with the arc trajectory of the corner. The semi-circular arc welding module 6 integrates a first welding wire replenishment module 7 and an auxiliary welding module 9. The first welding wire replenishment module 7 stores and supplies welding wire to the welding area, while the auxiliary welding module 9 provides assistance during the welding process, specifically by providing shielding gas and limiting the flow to ensure the stability of the molten pool.

[0052] The first servo motor 51 in the drive module 5 drives the semi-circular arc welding module 6 to rotate on the outer side of the contact end face of the two sets of photovoltaic panel frame plates to be welded. At the same time, the first welding wire replenishment module 7 continuously supplies welding wire to the root of the bevel at the contact end face. With the cooperation of the auxiliary welding module 9, the welding wire is melted by the externally assembled welding gun. With the help of the rotation of the semi-circular arc welding module 6, the molten welding wire is driven to spread in a circular manner on the contact end face. This realizes the active and controlled spreading of the welding wire at the root of the bevel at the corner, changing the way the welding wire passively flows by gravity in traditional welding. This allows the molten metal to fill every tiny area of ​​the root of the bevel evenly and fully along the predetermined arc path, thereby improving the fusion quality and strength of the corner connection and ensuring the overall structural integrity and long-term sealing performance of the photovoltaic panel frame.

[0053] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a circular frame is assembled on the outer surface of the first servo motor 51, and is fixedly mounted on the end face of the output end of the servo robotic arm 4 through the circular frame. A gear drive ring 52 is fixedly mounted on the output end of the first servo motor 51. An extended assembly arm 53 is fixedly mounted on the outer side wall of the first servo motor 51. A first semi-circular arc-shaped limiting frame 54 is fixedly mounted on the extended assembly arm 53. The first semi-circular arc-shaped limiting frame 54 is also C-shaped in a semi-circular shape. The welding module 6 includes a second semi-circular arc-shaped limiting frame 61. An outer engaging protrusion 62 is fixedly installed at the middle position of the outer side of the second semi-circular arc-shaped limiting frame 61. The second semi-circular arc-shaped limiting frame 61 is slidably assembled in the first semi-circular arc-shaped limiting frame 54 through the outer engaging protrusion 62. A first arc-shaped toothed sleeve 63 is fixedly installed on the edge of the second semi-circular arc-shaped limiting frame 61 near the first semi-circular arc-shaped limiting frame 54. The first arc-shaped toothed sleeve 63 meshes with the gear drive ring 52.

[0054] The first servo motor 51 serves as the power source for the entire drive module 5. A circular frame, a ring-shaped metal structure, is mounted on its outer surface to enhance the connection strength and stability between the first servo motor 51 and the servo robotic arm 4. The circular frame is bolted to the output end of the servo robotic arm 4, ensuring that the first servo motor 51 does not wobble or shift during high-speed rotation, providing a stable mounting base for the subsequent transmission structure. The gear drive ring 52 is fixedly mounted on the output end of the first servo motor 51. The gear drive ring 52 is a ring gear structure with teeth evenly distributed around its outer circumference. When the first servo motor 51 operates, its output end drives the gear drive ring 52 to rotate synchronously. As an active transmission component, the gear drive ring 52 transmits the rotational power of the first servo motor 51 to the semi-circular welding module 6. The configured extended assembly arm 53 is fixedly installed on the outer side wall of the first servo motor 51. The extended assembly arm 53 is an L-shaped metal arm structure. One end of it is fixedly connected to the outer side wall of the first servo motor 51, and the other end extends outward to support the first semi-circular arc-shaped limiting frame 54. The setting of the extended assembly arm 53 enables the first semi-circular arc-shaped limiting frame 54 to maintain a relatively fixed positional relationship with the first servo motor 51, while providing a support platform for the sliding assembly of the second semi-circular arc-shaped limiting frame 61 and a limiting function during the rotation process.

[0055] The configured first semi-circular arc-shaped limiting frame 54 is fixedly installed on the extended assembly arm 53. The first semi-circular arc-shaped limiting frame 54 has a semi-circular C-shaped structure, and a sliding track that cooperates with the second semi-circular arc-shaped limiting frame 61 is formed inside it. As a stationary component, the first semi-circular arc-shaped limiting frame 54 keeps its position fixed during the welding process, and provides guidance and limiting function for the rotational movement of the second semi-circular arc-shaped limiting frame 61, ensuring that the second semi-circular arc-shaped limiting frame 61 always moves along the predetermined arc trajectory during the rotation process, and will not experience radial offset or axial movement. The configured second semi-circular arc-shaped limiting frame 61 also has a semi-circular C-shaped structure, and its arc contour matches the arc contour of the first semi-circular arc-shaped limiting frame 54. An outer locking protrusion 62 is fixedly installed at the middle position of the outer side of the second semi-circular arc-shaped limiting frame 61. The outer locking protrusion 62 is a cylindrical boss-shaped structure, and its size matches the sliding track inside the first semi-circular arc-shaped limiting frame 54. The second semi-circular arc-shaped limiting frame 61 is slidably assembled into the first semi-circular arc-shaped limiting frame 54 through the outer locking protrusion 62, forming a sliding fit relationship. This allows the second semi-circular arc-shaped limiting frame 61 to rotate along the arc trajectory within the first semi-circular arc-shaped limiting frame 54. At the same time, the fit between the outer locking protrusion 62 and the first semi-circular arc-shaped limiting frame 54 can effectively restrict the radial and axial degrees of freedom of the second semi-circular arc-shaped limiting frame 61, retaining only the rotational degree of freedom, and ensuring the motion accuracy of the semi-circular arc-shaped welding module 6 during rotation. The first arc-shaped toothed sleeve 63 is fixedly installed on the edge of the second semi-circular arc-shaped limiting frame 61 near the first semi-circular arc-shaped limiting frame 54. The first arc-shaped toothed sleeve 63 is an arc-shaped gear structure, and its tooth profile meshes with the tooth profile of the gear drive ring 52. The first arc-shaped toothed sleeve 63 and the gear drive ring 52 mesh and correspond to form a gear transmission pair. When the first servo motor 51 drives the gear drive ring 52 to rotate, the gear drive ring 52 drives the first arc-shaped toothed sleeve 63 to rotate synchronously through the tooth meshing action, thereby driving the second semi-circular arc-shaped limiting frame 61 to rotate around its center, realizing the rotation control of the semi-circular arc-shaped welding module 6.

[0056] During operation, the rotational power of the first servo motor 51 is precisely transmitted to the second semi-circular arc-shaped limiting frame 61 through the meshing transmission between the gear drive ring 52 and the first arc-shaped toothed sleeve 63. At the same time, a stable guiding and limiting mechanism is formed through the sliding engagement structure between the outer locking protrusion 62 and the first semi-circular arc-shaped limiting frame 54. This effectively prevents the second semi-circular arc-shaped limiting frame 61 from radially shifting or axially moving during rotation, ensuring that the semi-circular arc-shaped welding module 6 always moves along the predetermined arc trajectory. This allows the welding wire to be spread at the bevel root of the photovoltaic panel frame corner, improving the consistency and stability of the welding quality. In addition, both the first semi-circular arc-shaped limiting frame 54 and the second semi-circular arc-shaped limiting frame 61 adopt a semi-circular C-shaped structure design, which allows them to surround the outer side of the contact end face of the two sets of photovoltaic panel frame plates to be welded, and can be fitted from the outside to the outside of the welding end face without interfering with the frame welding work. With the help of the gear transmission mechanism, the welding wire can be actively spread in a circular manner, which can overcome the technical problems of difficult welding wire positioning and insufficient fusion caused by the narrow welding space in the prior art.

[0057] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the interior of the second semi-circular arc-shaped limiting frame 61 is a cavity with the same arc-shaped contour, and an inner plate 64 is fixedly connected to both sides of the cavity. A third semi-circular arc-shaped limiting frame 65 with the same arc is fixedly connected to both sides of the cavity of the second semi-circular arc-shaped limiting frame 61 through the inner plate 64. A second arc-shaped toothed sleeve 67 is fixedly connected to both sides of the outer surface of the third semi-circular arc-shaped limiting frame 65. A second arc-shaped sliding groove 68 is opened on both sides of the inner wall of the third semi-circular arc-shaped limiting frame 65 along the arc-shaped contour. A second welding wire supplement module 8 is slidably assembled on the arc edge of the third semi-circular arc-shaped limiting frame 65 through the second arc-shaped sliding groove 68.

[0058] The second semi-circular arc-shaped limiting frame 61 is a semi-circular C-shaped hollow frame structure. Its interior is a cavity design with the same arc-shaped contour as the outer contour. The cavity extends through the arc of the second semi-circular arc-shaped limiting frame 61 to form an internal installation space. The middle end of the second semi-circular arc-shaped limiting frame 61 is an open structure design. The open end is located in the radial direction of the center of the arc contour of the second semi-circular arc-shaped limiting frame 61, so that external components can extend into the central area of ​​the second semi-circular arc-shaped limiting frame 61 from the open end. This facilitates the auxiliary welding module 9 to point from the open end towards the center of the second semi-circular arc-shaped limiting frame 61 and insert itself between the contact end faces of the two sets of photovoltaic panel frame plates to be welded for auxiliary welding operations. This avoids the spatial restriction on the welding tools entering the welding area by the traditional closed frame and provides sufficient operating space for welding operations.

[0059] Two inner plates 64 are configured and fixedly connected to the two sides of the cavity inside the second semi-circular arc-shaped limiting frame 61. The inner plate 64 is an arc-shaped plate-shaped metal structure, and its arc contour matches the contour of the internal cavity of the second semi-circular arc-shaped limiting frame 61. The inner plate 64 is fixed to the inner wall of the second semi-circular arc-shaped limiting frame 61 by bolt connection. The inner plate 64 serves as an intermediate connecting transition component, providing stable connection support between the second semi-circular arc-shaped limiting frame 61 and the third semi-circular arc-shaped limiting frame 65, enhancing the rigidity and stability of the overall structure. At the same time, the setting of the inner plate 64 enables the third semi-circular arc-shaped limiting frame 65 to maintain a concentric arc layout with the second semi-circular arc-shaped limiting frame 61, ensuring the accuracy of the motion trajectory of the subsequent sliding component. The configured third semi-circular arc-shaped limiting frame 65 is fixedly connected to both sides of the cavity of the second semi-circular arc-shaped limiting frame 61 through the inner plate 64. The third semi-circular arc-shaped limiting frame 65 and the second semi-circular arc-shaped limiting frame 61 have the same curvature, forming a concentric arc nested structure. The third semi-circular arc-shaped limiting frame 65 also adopts a semi-circular C-shaped frame design, and its interior forms an internal space for accommodating and guiding the sliding movement of the second welding wire replenishment module 8. The third semi-circular arc-shaped limiting frame 65 serves as the direct mounting carrier of the second welding wire replenishment module 8, providing stable track support for the welding wire replenishment operation. The configured second arc-shaped toothed sleeves 67 are fixedly connected to both sides of the outer surface of the third semi-circular arc-shaped limiting frame 65. The second arc-shaped toothed sleeves 67 are arc-shaped gear structures, and their tooth profiles are distributed along the arc-shaped contour of the third semi-circular arc-shaped limiting frame 65. The second arc-shaped toothed sleeves 67 can mesh with the external first gear block 610 and second gear block 611 to drive the second welding wire replenishment module 8 to move along the second arc-shaped slide groove 68. The gear drive ring 52 drives the second semi-circular arc-shaped limiting frame 65 by rotation. When frame 61 rotates to the side, it continues to rotate around the center. Because the rotation range of the second semi-circular arc-shaped limiting frame 61 is limited by the first semi-circular arc-shaped limiting frame 54, the rotation range of the second semi-circular arc-shaped limiting frame 61 is maintained at half a circle. However, through the meshing drive relationship between the first gear block 610 at the output end of the second servo motor 69 and the second arc-shaped toothed sleeve 67, it can continue to rotate when it rotates to the side, so as to ensure that the auxiliary welding module 9 can complete a 360-degree shape on the welding end face to spread the molten welding wire.

[0060] The second arc-shaped slide groove 68 is located on both sides of the inner wall of the third semi-circular arc-shaped limiting frame 65. The second arc-shaped slide groove 68 extends along the arc-shaped contour of the third semi-circular arc-shaped limiting frame 65, forming an arc-shaped guide rail structure. The groove shape of the second arc-shaped slide groove 68 matches the sliding mating parts of the second welding wire replenishment module 8. The second arc-shaped slide groove 68 provides precise sliding guidance for the second welding wire replenishment module 8, ensuring that the second welding wire replenishment module 8 always moves along the predetermined arc-shaped trajectory during sliding, without deviation or jamming. The second welding wire replenishment module 8 is slidably assembled onto the arc edge of the third semi-circular arc-shaped limiting frame 65 via the second arc-shaped slide groove 68. The second welding wire replenishment module 8 is a welding wire storage and conveying unit. During operation, the second welding wire replenishment module 8 can perform arc-shaped sliding adjustment along the second arc-shaped slide groove 68. Through a multi-layer concentric arc nested structure, the second welding wire replenishment module 8 can perform 360-degree rotation adjustment, significantly improving the fusion quality and connection strength of the welding at the corner of the photovoltaic panel frame.

[0061] like Figure 3 , Figure 4 , Figure 5 As shown, the second welding wire replenishment module 8 includes a second protective housing 81. Both sides of the outer surface of the second protective housing 81 are fixedly installed with inserts 82 that fit into the second arc-shaped slide groove 68. On the outer surfaces of the inserts 82 on both sides, a first gear block 610 and a second gear block 611 corresponding to the second arc-shaped toothed sleeve 67 are movably installed through the second arc-shaped slide groove 68. A second servo motor 69 is fixedly installed on one side of the first gear block 610. A first arc-shaped slide groove 66 is opened on the side of the second semi-circular arc-shaped limiting frame 61 for the second servo motor 69 to slide and fit. The output end of the second servo motor 69 is connected to the axis of the first gear block 610 to drive the second protective housing 81 to slide in an arc along the second arc-shaped slide groove 68.

[0062] The second protective housing 81, which serves as the main outer shell structure of the second welding wire supplement module 8, is made of metal. Both sides of the outer surface of the second protective housing 81 are fixedly installed with inserts 82. The inserts 82 are block-shaped structures, and their size and shape match the groove of the second arc-shaped slide groove 68. The inserts 82 fit into the second arc-shaped slide groove 68 to form a sliding fit relationship, which allows the second protective housing 81 to slide along the arc trajectory of the second arc-shaped slide groove 68. At the same time, the fit between the inserts 82 and the second arc-shaped slide groove 68 can effectively restrict the radial and axial degrees of freedom of the second protective housing 81, retaining only the sliding degree of freedom along the arc trajectory. The first gear block 610 and the second gear block 611 are respectively movably mounted on the outer surface of the two side inserts 82. The first gear block 610 and the second gear block 611 are both meshed with the external second arc-shaped toothed sleeve 67 by passing through the second arc-shaped sliding groove 68. The first gear block 610 and the second gear block 611 are circular gear structures, and their tooth profiles mesh with the tooth profiles of the second arc-shaped toothed sleeve 67 to form a gear transmission pair. When the first gear block 610 rotates, it drives the second protective shell 81 to slide in an arc along the second arc-shaped sliding groove 68 through the meshing action with the second arc-shaped toothed sleeve 67, thereby realizing the position adjustment of the second welding wire replenishment module 8. The configured second servo motor 69 is fixedly installed on one side of the first gear block 610. The second servo motor 69 is a servo drive motor device in the prior art. Its output end is connected to the shaft of the first gear block 610. When the second servo motor 69 works, its output end drives the first gear block 610 to rotate synchronously. The first gear block 610 converts the rotational motion into the arc-shaped sliding motion of the second protective housing 81 along the second arc-shaped slide groove 68 through meshing transmission with the second arc-shaped toothed sleeve 67, thereby realizing the position control of the second welding wire replenishment module 8. The first arc-shaped slide groove 66 is provided on the side of the second semi-circular arc-shaped limiting frame 61. The first arc-shaped slide groove 66 extends along the arc-shaped contour of the second semi-circular arc-shaped limiting frame 61. The groove shape of the first arc-shaped slide groove 66 matches the outer dimensions of the second servo motor 69. The second servo motor 69 is slidably fitted into the first arc-shaped slide groove 66, so that the second servo motor 69 can slide synchronously along the first arc-shaped slide groove 66 as the second protective housing 81 slides. The first arc-shaped slide groove 66 provides sliding guidance and accommodation space for the second servo motor 69, avoiding interference between the second servo motor 69 and the surrounding structure during movement, and ensuring the smooth operation of the transmission mechanism.

[0063] During operation, the second welding wire replenishment module 8 achieves 360-degree complete rotation adjustment through a multi-layer concentric arc nested structure. First, the rotation of the gear drive ring 52 at the output end of the first servo motor 51 drives the outer meshing second semi-circular arc-shaped limiting frame 61 to rotate. During the rotation of the second semi-circular arc-shaped limiting frame 61, due to the limiting effect of the first semi-circular arc-shaped limiting frame 54, the auxiliary welding module 9 on the device can be completely rotated and adjusted forward 180 degrees. When the second servo motor 69 drives the first gear block 610 to rotate, the first gear block 610 drives the second protective housing 81 to slide along the second arc-shaped sliding groove 68 within the range of the second semi-circular arc-shaped limiting frame 61 in an arc-shaped phase of the next 180 degrees through the meshing action with the second arc-shaped toothed sleeve 67. This allows the welding wire output end of the second welding wire replenishment module 8 to reach any position in the welding area of ​​the corner of the photovoltaic panel frame, achieving complete circumferential coverage of the welding area by the welding wire. This overcomes the technical problem in the prior art where the welding wire cannot be accurately delivered to certain welding areas due to the limited rotation range, resulting in interruption of welding continuity, and ensures the integrity and sealing performance of the welding at the corner of the photovoltaic panel frame.

[0064] like Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the auxiliary welding module 9 includes bent insert plates 91 assembled and connected to the bottom sides of the second protective shell 81. Each bent insert plate 91 has a protruding circular perforated plate 92 fixedly connected to it. Each circular perforated plate 92 has a circular perforated area, and the center of the protruding circular perforated plate 92 coincides with the center of the third semi-circular arc-shaped limiting frame 65. A circularly coiled gas supply hose 93 is fixedly installed on the edge of the circular perforated area of ​​the circular perforated plate 92. Several spray nozzles 94 are equidistantly opened on the gas supply hose 93. A gas guide hose 97 is fixedly connected between two bent insert plates 91 to connect the two gas supply hoses 93 in series. An auxiliary assembly rod 96 is fixedly connected to the top of one bent insert plate 91. The interior of the auxiliary assembly rod 96 is hollow to insert the hose and form a delivery channel connecting the gas guide hose 97 and the inert gas supply end.

[0065] Two bent insert plates 91 are configured and assembled and connected to the bottom sides of the second protective housing 81, respectively. Each bent insert plate 91 is an inwardly folded L-shaped metal plate structure. One end is fixedly connected to the bottom side of the second protective housing 81, and the other end extends outward to support the circular perforated plate 92. The bent insert plates 91 ensure that the circular perforated plate 92 maintains a relatively fixed positional relationship with the second protective housing 81. Simultaneously, the inwardly folded L-shaped structure of the bent insert plates 91 avoids spatial interference in the welding area, thus providing a more stable position for the circular perforated plate 92. The circular perforated plate 92 provides a stable installation support platform. One end of the circular perforated plate 92 is a thin sheet that can be inserted into the welding area, and a circular perforated area is opened on it. The center of the circular perforated area coincides with the center of the third semi-circular arc-shaped limiting frame 65, forming a concentric circle layout. The concentric circles of the circular perforated plate 92 ensure that the protective gas sprayed from the gas supply hose 93 can be evenly distributed around the welding point, ensuring that the protective gas coverage around the molten pool area is consistent. On the other hand, it also leaves space for the welding wire to rotate and spread. Two gas delivery hoses 93 are configured, each fixedly installed on the edge of the circular perforated area of ​​the two annular perforated plates 92. The gas delivery hoses 93 are arranged in a circular coil, and their coiling trajectory matches the edge of the circular perforated area of ​​the annular perforated plate 92. The gas delivery hoses 93 are flexible gas delivery pipes used to deliver inert protective gas to the welding area. The circular coil design of the gas delivery hoses 93 allows the protective gas to be delivered to the welding point simultaneously from multiple directions, forming a surrounding gas protection field. Several spray nozzles 94 are configured, equidistantly located on the pipe wall of the gas delivery hoses 93. The spray nozzles 94 have a circular orifice structure, allowing the protective gas to be sprayed evenly from multiple positions, forming an all-round gas protection coverage. This ensures that the molten pool area is always in an inert gas protective environment during the welding process, effectively preventing welding defects caused by air intrusion. The configured gas delivery hose 97 is fixedly connected between two bent insert plates 91. The gas delivery hose 97 is a flexible gas delivery pipe, and its two ends are connected to two gas delivery hoses 93 respectively. The gas delivery hose 97 connects the two gas delivery hoses 93 in series to form a unified gas delivery circuit, so that inert gas can be delivered from a single gas inlet to the two gas delivery hoses 93 at the same time, ensuring that the gas flow and pressure of the two gas delivery hoses 93 are consistent.The auxiliary assembly rod 96 is fixedly connected to the top of the bent insert plate 91 on one side. The auxiliary assembly rod 96 is a tubular structure with a hollow interior. The cavity of the auxiliary assembly rod 96 is used to insert a flexible tube, forming a delivery channel connecting the gas delivery tube 97 and the inert gas supply end. The auxiliary assembly rod 96 serves as a protective sleeve for the gas delivery channel to prevent external interference from damaging the gas delivery tube. On the other hand, it serves as a connection interface between the auxiliary welding module 9 and the external gas supply system, facilitating stable gas access and delivery. During operation, the concentric circle layout design of the circular hollow plate 92 and the third semi-circular arc-shaped limiting frame 65 ensures that the protective gas ejected from the gas delivery tube 93 can be evenly distributed around the welding point, forming a surrounding gas protection field, which improves the fusion quality and sealing performance of the corner welding of the photovoltaic panel frame.

[0066] Furthermore, due to the limitations of the profile cross-sectional dimensions of the photovoltaic module frame, the width and area of ​​the end face to be welded are extremely limited in actual operation. Therefore, the interval between the two circular perforated plates 92 is only slightly larger than the diameter of the welding wire, so as to facilitate the smooth insertion of the auxiliary welding module 9.

[0067] like Figure 3 , Figure 4 , Figure 7 As shown, the second protective shell 81 is a hollow, racetrack-shaped block structure. A collar frame 84 is fixedly installed on both sides of the inner cavity of the second protective shell 81. Roller sleeves 85 are movably fitted onto each collar frame 84. The two roller sleeves 85 are arranged flush and each end is fixedly fitted with a meshing third gear block 86. A circular airbag sleeve 87 is fixedly installed at the middle of the outer surface of each roller sleeve 85, and a brush ring 88 is attached to each circular airbag sleeve 87. A reserved outlet 83 is provided at the middle of the upper and lower surfaces of the second protective shell 81.

[0068] like Figure 3 , Figure 4 , Figure 7 As shown, the second welding wire replenishment module 8 also includes a liquid supply annular cavity 89 fixedly installed at the middle position of both sides of the cavity inside the second protective housing 81. One end of the liquid supply annular cavity 89 extends along the inner wall of the second protective housing 81 to the top side of the roller sleeve 85, while the other end of the liquid supply annular cavity 89 extends along the inner wall of the second protective housing 81 to the bottom side of the roller sleeve 85. An open groove 811 is opened on one side of the roller sleeve 85 at the bottom side, and the opening of the open groove 811 faces the brush ring 88. A liquid replenishment sealing port 810 is provided on the side of the liquid supply annular cavity 89 extending to the top side of the roller sleeve 85.

[0069] The racetrack-shaped design of the second protective housing 81 allows it to accommodate more internal transmission components within a limited space while maintaining structural compactness and stability. The second protective housing 81 is made of aluminum alloy as a hollow block, which has good rigidity and corrosion resistance. The upper and lower surfaces of the second protective housing 81 are provided with reserved outlets 83 at the middle position. The reserved outlets 83 are circular through holes. The upper reserved outlet 83 serves as the welding wire entry channel, and the lower reserved outlet 83 serves as the welding wire output channel. The welding wire is inserted directly into the internal cavity of the second protective housing 81 from the upper reserved outlet 83. After being processed by the internal wire feeding mechanism, it is output to the welding area from the lower reserved outlet 83. The diameter of the reserved outlet 83 is slightly larger than the diameter of the welding wire to ensure that the welding wire can pass smoothly without generating excessive friction. The second protective housing 81 contains two sets of collar frames 84, which are fixedly installed on both sides of the inner cavity of the second protective housing 81 to support the roller sleeve 85 and provide a support axis for the rotational movement of the roller sleeve 85. Two roller sleeves 85 are configured, each movably sleeved on two sets of collar frames 84. The roller sleeves 85 are cylindrical roller structures. The two roller sleeves 85 are arranged flat and parallel to each other. The distance between the two roller sleeves 85 is smaller than the diameter of the welding wire, so that the welding wire can simultaneously contact the outer surfaces of the two roller sleeves 85 when passing between them, forming a clamping and feeding state. A third gear block 86 is fixedly installed at both ends of the roller sleeve 85. The third gear block 86 is a circular gear structure. The third gear blocks 86 at both ends of the two roller sleeves 85 mesh with each other to form a gear transmission pair. When one side of the roller sleeve 85 is driven to rotate, the meshing transmission of the third gear block 86 drives the other side of the roller sleeve 85 to rotate synchronously in the opposite direction. The opposite rotation of the two roller sleeves 85 generates a downward wire feeding thrust, which conveys the welding wire from the upper reserved outlet 83 to the lower reserved outlet 83, realizing continuous and stable feeding of the welding wire.Two annular airbag sleeves 87 are configured, fixedly installed at the middle position of the outer surface of the two roller sleeves 85. The annular airbag sleeve 87 is a ring-shaped airbag structure made of elastic rubber. The interior of the annular airbag sleeve 87 is hollow, and its outer diameter can be adjusted by inflation and deflation using a micro motor. During the wire feeding process, the annular airbag sleeve 87 is inflated, causing its outer surface to expand outward and fit against both sides of the directly inserted welding wire. The expansion and clamping effect of the annular airbag sleeve 87 ensures that the welding wire is stably clamped between the two roller sleeves 85, avoiding unstable clamping force caused by welding wire diameter tolerances or surface unevenness. Brush rings 88 are respectively attached to the outer surface of the two annular airbag sleeves 87. The brush rings 88 are annular bristle structures made of flexible fiber or metal wire. The bristles extend towards the direction of contact with the welding wire. When the welding wire passes between the two roller sleeves 85, the bristles of the brush ring 88 contact the outer surface of the welding wire. The liquid supply annular cavity 89 is an annular cavity structure used to store and transport the welding wire treatment liquid. One end of the liquid supply annular cavity 89 extends along the inner wall of the second protective housing 81 to the top side of the roller sleeve 85, while the other end of the liquid supply annular cavity 89 extends along the inner wall of the second protective housing 81 to the bottom side of the roller sleeve 85, forming a liquid transport channel around the roller sleeve 85. A liquid replenishment sealing port 810 is provided on the side of the liquid supply annular cavity 89 extending to the top side of the roller sleeve 85. The liquid replenishment sealing port 810 is a quick-connect interface structure used to replenish the welding wire treatment liquid into the liquid supply annular cavity 89. The liquid replenishment sealing port 810 is kept sealed when not in use to prevent liquid leakage or evaporation. The open groove 811 is located on one side of the bottom side of the roller sleeve 85. The opening of the open groove 811 faces the brush ring 88. The open groove 811 is the liquid outlet channel of the liquid supply annular cavity 89. The welding wire treatment liquid is applied to the outer surface of the welding wire by the brush ring 88 from the liquid supply annular cavity 89 through the open groove 811.

[0070] The welding wire treatment fluid is a special wire feeding lubricant and activator for aluminum alloy welding wire. Its main components include polyethylene glycol and silicone oil as lubricating components, as well as activating components such as fluorides and chlorides as weak acidic activators. On the one hand, it is used to reduce wire feeding resistance, ensure the smoothness and continuity of wire feeding, and avoid the problem of unstable wire feeding speed caused by fluctuations in wire feeding resistance. On the other hand, it is used to slightly corrode and remove the alumina film on the surface of the welding wire during the wire feeding process. Since aluminum alloy welding wire is very easy to form a dense alumina film in the air, the melting point of which is much higher than that of the aluminum substrate. If it is not removed, it will affect the welding fusion quality. The activating components can remove the surface oxide film before the welding wire enters the welding area, thereby improving the fusion effect during welding. As the welding wire is inserted into the pre-reserved outlet 83 on the upper side of the second protective housing 81 and fed downwards, the liquid in the liquid supply annular cavity 89 is evenly coated on the outer surface of the welding wire through the open groove 811. The lubricating components in the liquid reduce the frictional resistance between the welding wire and the roller sleeve 85, ensuring a smooth and stable wire feeding process. The activating components undergo a slight chemical reaction with the alumina film on the surface of the welding wire, removing the oxide film and activating the surface of the welding wire, dissolving and removing impurities on the surface of the welding wire, and improving the welding fusion quality and corner connection strength of the aluminum alloy welding wire.

[0071] like Figure 3 , Figure 4 , Figure 6 , Figure 8 , Figure 9 As shown, the first welding wire replenishment module 7 includes a first protective housing 71, which is assembled on top of the second protective housing 81. A hanger 72 is fixedly installed inside the first protective housing 71, and a wire feeding sleeve 75 is fixedly connected to the bottom of the hanger 72. The surface of the wire feeding sleeve 75 has a circular opening facing the reserved outlet 83, and a limiting circular opening plate 76 is fixedly installed at the bottom of the wire feeding sleeve 75. The limiting circular opening plate 76 also has a circular opening facing the reserved outlet 83, and a parallel slot is opened on the side of the circular opening. A servo hydraulic rod 77 is fixedly installed in the parallel slot.

[0072] like Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8As shown, a cutting head 78 is fixedly installed on the output end of the servo hydraulic rod 77. The cutting head 78 is a circular head that can closely fit the inner wall of the circular opening on the limiting circular opening plate 76. A third servo motor 73 is fixedly installed on the top side of the hanger 72. A wire winding disc 74 is fixedly installed on the output end of the third servo motor 73. Flux-cored welding wire is wound on the wire winding disc 74. Magnetic ring plates 95 are movably installed on the side of the circular hollow plate 92. A reserved welding frame 98 for assembling a welding gun is opened on the side of the bent insert plate 91. A preheating cylindrical sleeve 10 is assembled on the reserved outlet 83 at the bottom of the second protective shell 81.

[0073] The first protective housing 71 and the second protective housing 81 are detachably connected by bolts, facilitating the maintenance and replacement of internal components. The bottom of the first protective housing 71 is aligned with the upper reserved outlet 83 of the second protective housing 81, forming a continuous conveying channel for the welding wire from top to bottom. The hanger 72 is welded to the inner wall of the first protective housing 71, providing a stable mounting base for the internal components. The third servo motor 73 is fixedly installed on the top side of the hanger 72, and its output end is connected to the axis of the wire winding spool 74. It drives the wire winding spool 74 to rotate, gradually releasing and conveying the flux-cored welding wire wound on the wire winding spool 74 downwards. The speed of the third servo motor 73 can be precisely controlled according to the welding process requirements to ensure the stability and consistency of the welding wire conveying speed. The flux-cored welding wire is an aluminum alloy welding wire filled with flux components. It is suitable for corner welding operations of photovoltaic panel frames. The wire winding spool 74 rotates under the drive of the third servo motor 73, gradually releasing the coiled flux-cored welding wire. After being led out from the wire winding spool 74, the welding wire passes downward through the circular opening of the wire release sleeve 75 and the limiting circular opening plate 76, and enters the interior of the second protective housing 81 for subsequent processing.

[0074] The configured wire guide plate 75 is fixedly connected to the bottom of the hanger 72. The wire guide plate 75 is a flat metal structure with a circular opening on its surface facing the reserved outlet 83. This circular opening is used to guide the welding wire from the first protective shell 71 into the second protective shell 81. The wire guide plate 75 also serves to initially straighten the coiled welding wire, making it relatively straight before entering the second protective shell 81. The configured limiting circular opening plate 76 is fixedly installed at the bottom of the wire guide plate 75. The limiting circular opening plate 76 is also a flat metal structure with a circular opening facing the reserved outlet 83. The circular opening of the limiting circular opening plate 76 is concentrically aligned with the circular opening of the wire guide plate 75. A parallel slot is also provided on the side of the circular opening on the limiting circular opening plate 76. A servo hydraulic rod 77 is fixedly installed in the parallel slot. The servo hydraulic rod 77 is a precision hydraulic drive actuator in the prior art, and its output end can perform linear reciprocating motion along the direction of the parallel slot. The configured cutting head 78 is fixedly installed on the output end of the servo hydraulic rod 77. The cutting head 78 is a circular cutting head that can closely adhere to the inner wall of the circular opening on the limiting circular opening plate 76. The cutting edge of the circular cutting head forms a shearing engagement with the inner wall of the circular opening of the limiting circular opening plate 76. When the welding wire extends from the circular opening of the limiting circular opening plate 76 to a preset length, the servo hydraulic rod 77 drives the cutting head 78 to move along the direction parallel to the slot. The circular cutting head engages with the inner wall of the circular opening of the limiting circular opening plate 76 to form a shearing action, cutting the welding wire. This results in straight welding wire segments being discharged, rather than a continuous long wire. The fixed-length cut welding wire segments facilitate precise control in the subsequent welding process, ensuring consistent welding wire filling amount for each weld. Furthermore, they can be cut in a timely manner as needed, avoiding fluctuations in welding heat input and unstable fusion quality caused by inconsistent welding wire extension lengths.

[0075] The preheating cylindrical sleeve 10 is assembled on the reserved outlet 83 at the bottom of the second protective shell 81. The preheating cylindrical sleeve 10 is a cylindrical heating component with a hollow cylindrical channel inside. It is a welding wire preheating device in the prior art. It is equipped with a resistance heating element and an induction heating coil. The welding wire passes through the cylindrical channel inside the preheating cylindrical sleeve 10 and is preheated. It also integrates an electronically controlled clamping end in the prior art to tighten the cylindrical opening in real time to prevent some welding wires with smaller diameters from falling directly out of the cylinder.

[0076] During operation, the welding wire undergoes preheating before entering the molten pool. This process gradually raises the wire temperature from room temperature to near the molten pool temperature, reducing the temperature difference between the wire and the pool. This prevents a sudden drop in pool temperature and thermal shock caused by a cold wire directly entering a high-temperature pool, thus improving fusion stability. During preheating, moisture and gases adsorbed on the wire surface and inside the flux core are evaporated and expelled beforehand, preventing porosity defects caused by thermal expansion of moisture and gases upon entering the molten pool. The reduced heat required for fusion when the preheated wire enters the molten pool lowers the heat input requirements of the welding power source and minimizes the heat-affected zone.

[0077] The reserved welding frame 98 is located on the side of the bent insert plate 91. The reserved welding frame 98 is a rectangular or square opening structure, which is equivalent to an installation interface opening. The welding gun can be assembled at this position. The welding gun extends into the welding area from the side through the reserved welding frame 98 to heat and melt the end of the welding wire passing through the preheating cylindrical sleeve 10. The size and position of the reserved welding frame 98 are designed according to the external dimensions of the standard welding gun to ensure that the welding gun can be installed stably and the gun head is accurately aligned with the welding wire output end and the welding pool area. The opening design of the reserved welding frame 98 also facilitates the quick disassembly and maintenance of the welding gun. When the welding gun needs to be replaced or repaired, it can be quickly disassembled from the reserved welding frame 98 position without disassembling the entire auxiliary welding module 9 structure, which improves the maintainability and ease of use of the equipment.

[0078] The configured magnetic ring plate 95 is movably installed on the side of the ring-shaped hollow plate 92. The magnetic ring plate 95 is a ring-shaped magnetic adsorption plate structure made of permanent magnet material. The magnetic ring plate 95 can be used to adsorb and fix on the welding end face of the two frames, which is equivalent to a temporary adsorption limit on the outside of the circular area to be welded, preventing unnecessary displacement during the rotation operation and improving the stability of the welding operation.

[0079] The usage method provided by this invention is as follows:

[0080] In use, the invention first initiates the wire supply process based on the control system. The output of the third servo motor 73 drives the wire winding disc 74 to rotate, gradually releasing and conveying the coiled flux-cored wire downwards. The wire passes through the wire feeding sleeve 75 and the circular opening of the limiting circular opening plate 76 and enters the interior of the second protective housing 81. When the wire extension length reaches the preset welding requirement, the servo hydraulic rod 77 drives the cutting head 78 to move along the parallel groove. The circular cutting head 78 closely adheres to the inner wall of the circular opening of the limiting circular opening plate 76 to form a shearing action, cutting the wire into a fixed-length straight wire segment. Subsequently, the wire enters the cavity inside the second protective housing 81. The wire treatment liquid in the supply annular cavity 89 is applied to the outer surface of the wire through the open groove 811. At the same time, the annular airbag sleeve 87 inflates and adheres to both sides of the wire. The third gear block 86 meshes with each other, driving the two side roller sleeves 85 to rotate in opposite directions, stably conveying the lubricated and activated wire downwards to the welding area.

[0081] The welding wire segment, steadily fed downwards, continues to fall through the internal cylindrical channel of the preheating cylindrical sleeve 10. The heating element inside the preheating cylindrical sleeve 10 preheats the welding wire, removing surface moisture and raising its temperature. Subsequently, the welding wire is discharged towards the center of the annular perforated plate 92 of the auxiliary welding module 9. At this time, the servo robotic arm 4 controls the device to move to the corner positions of the two photovoltaic panel frames to be welded, inserting one end of the discharged welding wire and the entire auxiliary welding module 9 between the corner faces of the two photovoltaic panel frames to be welded.

[0082] Immediately afterwards, the second servo motor 69 starts working. The output end of the second servo motor 69 drives the first gear block 610 to rotate. The first gear block 610 meshes with the second arc-shaped toothed sleeve 67, driving the second protective housing 81 to slide along the second arc-shaped slide groove 68 within the range of the second semi-circular arc-shaped limiting frame 61 in the first stage of arc-shaped sliding, realizing an initial 180-degree position rotation. During the rotation, the welding gun assembled on the outside of the reserved welding frame 98 heats the welding wire that extends into the center position of the circular hollow plate 92, melting it into a gel-like state. During this process, the molten gel-like welding wire is rotated and spread out in the initial 180-degree rotation. Therefore, in this process, the third servo motor 73 needs to continue rotating to discharge the welding wire and further push out the welding wire to continue the work of rotating and spreading the welding wire. When the first stage After the rotation is completed, the first servo motor 51 starts to rotate in the second stage. The output end of the first servo motor 51 drives the gear drive ring 52 to rotate. The gear drive ring 52 meshes with the first arc-shaped toothed sleeve 63 to drive the second semi-circular arc-shaped limiting frame 61 to rotate along the arc trajectory of the first semi-circular arc-shaped limiting frame 54. During this process, the outer locking protrusion 62 slides in the first semi-circular arc-shaped limiting frame 54 to provide guidance and limitation. The second servo motor 69 slides synchronously with the first arc-shaped slide groove 66. The rotation range in this stage is limited by the semi-circular C-shaped structure of the first semi-circular arc-shaped limiting frame 54 to achieve a 180-degree rotation in the second stage, so that the auxiliary welding module 9 continues to rotate to completely cover the welding end face. Throughout the process, the magnetic ring plate 95 is attracted and fixed to the outside of the circular area to be welded for temporary limitation.

[0083] During operation, the inert gas supply enters the gas guide hose 97 through the internal cavity of the auxiliary assembly rod 96, and is then transported in series to the gas delivery hoses 93 on both sides. The gas is evenly sprayed out from several spray nozzles 94 equidistantly opened on the gas delivery hoses 93, forming a surrounding gas protective field covering the molten pool area. The configured welding torch is assembled on the side of the bent insert plate 91 through the reserved welding frame 98. The welding torch heats and melts the end of the welding wire that passes through the preheating cylindrical sleeve 10. Under the continuous pushing of the roller sleeve 85 and the wire winding disc 74, the welding wire is pushed out of the preheating cylindrical sleeve 10 and extends into the welding end face. Finally, the device is reset after the corner of the photovoltaic module frame is welded.

[0084] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0085] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automatic welding device for photovoltaic panel frames, comprising a base assembly support frame (1) and a circular column disposed at the axial center of the surface of the base assembly support frame (1), wherein four sets of servo telescopic rods (2) arranged circumferentially at equal intervals are fixedly installed on the outer edge surface of the circular column, and a frame plate clamping frame (3) for fixing the photovoltaic panel frame to be welded is assembled on the output end of each servo telescopic rod (2), characterized in that: Servo robotic arms (4) are assembled at the four corners of the upper surface of the base assembly bracket frame (1), and each servo robotic arm (4) is equipped with a drive module (5) at its output end. The drive module (5) includes a first servo motor (51) and a semi-circular arc welding module (6) that rotates in conjunction with the first servo motor (51). The semi-circular arc welding module (6) is C-shaped in a semi-circular shape and moves to the outside of the contact end face of the two sets of photovoltaic panel frame plates to be welded by adjusting the servo robotic arm (4). The semi-circular arc welding module (6) is equipped with a first welding wire supplement module (7) and an auxiliary welding module (9) for supplying welding wire. The semi-circular arc welding module (6) is driven by the drive module (5) to rotate on the outside of the contact end face of the two sets of photovoltaic panel frame plates to be welded. The welding wire supplied by the first welding wire supplement module (7) is melted on the contact end face and spread in a circular manner with the auxiliary welding module (9). A circular frame is assembled on the outer surface of the first servo motor (51), and is fixedly mounted on the end face of the output end of the servo robotic arm (4) through the circular frame. A gear drive ring (52) is fixedly mounted on the output end of the first servo motor (51). An extended assembly arm (53) is fixedly mounted on the outer side wall of the first servo motor (51). A first semi-circular arc-shaped limiting frame (54) is fixedly mounted on the extended assembly arm (53). The first semi-circular arc-shaped limiting frame (54) is also C-shaped in a semi-circular shape. The semi-circular arc-shaped welding mold Block (6) includes a second semi-circular arc-shaped limiting frame (61), an outer engaging protrusion (62) is fixedly installed at the middle position of the outer side of the second semi-circular arc-shaped limiting frame (61), the second semi-circular arc-shaped limiting frame (61) is slidably assembled in the first semi-circular arc-shaped limiting frame (54) through the outer engaging protrusion (62), and a first arc-shaped toothed sleeve (63) is fixedly installed on the side edge of the second semi-circular arc-shaped limiting frame (61) close to the first semi-circular arc-shaped limiting frame (54), the first arc-shaped toothed sleeve (63) meshes with the gear drive ring (52); The interior of the second semi-circular arc-shaped limiting frame (61) is a cavity with the same arc contour, and an inner plate (64) is fixedly connected to both sides of the cavity. A third semi-circular arc-shaped limiting frame (65) with the same arc is fixedly connected to both sides of the cavity of the second semi-circular arc-shaped limiting frame (61) through the inner plate (64). A second arc-shaped toothed sleeve (67) is fixedly connected to both sides of the outer surface of the third semi-circular arc-shaped limiting frame (65). A second arc-shaped sliding groove (68) is opened along the arc contour on both sides of the inner wall of the third semi-circular arc-shaped limiting frame (65). A second welding wire supplement module (8) is slidably assembled on the arc edge of the third semi-circular arc-shaped limiting frame (65) through the second arc-shaped sliding groove (68). The second welding wire replenishment module (8) includes a second protective housing (81). Both sides of the outer surface of the second protective housing (81) are fixedly installed with inserts (82) fitted in the second arc-shaped slide groove (68). On the outer surfaces of the inserts (82) on both sides, a first gear block (610) and a second gear block (611) corresponding to meshing with the second arc-shaped toothed sleeve (67) are respectively installed through the second arc-shaped slide groove (68). A second servo motor (69) is fixedly installed on one side of the first gear block (610). A first arc-shaped slide groove (66) for the second servo motor (69) to slide and fit is provided on the side of the second semi-circular arc-shaped limiting frame (61). The output end of the second servo motor (69) is connected to the axis of the first gear block (610) to drive the second protective housing (81) to slide in an arc along the second arc-shaped slide groove (68).

2. The automatic welding equipment for photovoltaic panel frames according to claim 1, characterized in that, The auxiliary welding module (9) includes bent inserts (91) assembled and connected to the bottom sides of the second protective shell (81). Each bent insert (91) has a protruding circular perforated plate (92) fixedly connected to it. Each circular perforated plate (92) has a circular perforated area, and the center of the protruding circular perforated plate (92) coincides with the center of the third semi-circular arc-shaped limiting frame (65). The edges of the circular perforated areas of the circular perforated plates (92) are fixedly mounted with... It is equipped with a circular coiled gas delivery hose (93), and several spray nozzles (94) are equally spaced on the gas delivery hose (93). A gas guide hose (97) is fixedly connected between two bent insert plates (91) to connect the two gas delivery hoses (93) in series. An auxiliary assembly rod (96) is fixedly connected to the top of one side of the bent insert plate (91). The interior of the auxiliary assembly rod (96) is hollow so that the hose can be inserted to form a delivery channel connecting the gas guide hose (97) and the inert gas supply end.

3. The automatic welding equipment for photovoltaic panel frames according to claim 2, characterized in that, The second protective shell (81) is a hollow, racetrack-shaped block structure. A collar frame (84) is fixedly installed on both sides of the cavity inside the second protective shell (81). A roller sleeve (85) is movably fitted on the collar frame (84). The two roller sleeves (85) are arranged in parallel and each end is fixedly installed with a meshing third gear block (86). A circular airbag sleeve (87) is fixedly installed at the middle position of the outer surface of the roller sleeve (85). A brush ring (88) is attached to the circular airbag sleeve (87). A reserved outlet (83) is opened at the middle position of the upper and lower surfaces of the second protective shell (81).

4. The automatic welding equipment for photovoltaic panel frames according to claim 3, characterized in that, The second welding wire replenishment module (8) also includes a liquid supply annular cavity (89) fixedly installed at the middle position of both sides of the cavity inside the second protective housing (81). One end of the liquid supply annular cavity (89) extends along the inner wall of the second protective housing (81) to the top side of the roller sleeve (85), while the other end extends along the inner wall of the second protective housing (81) to the bottom side of the roller sleeve (85). An open groove (811) is opened on one side of the bottom side of the roller sleeve (85), with the opening of the open groove (811) facing the brush ring (88). A liquid replenishment sealing port (810) is provided on the side of the liquid supply annular cavity (89) extending to the top side of the roller sleeve (85).

5. The automatic welding equipment for photovoltaic panel frames according to claim 4, characterized in that, The first welding wire replenishment module (7) includes a first protective housing (71), which is assembled on the top of the second protective housing (81). A hanger (72) is fixedly installed inside the first protective housing (71). A wire feeding sleeve plate (75) is fixedly connected to the bottom of the hanger (72). A circular opening is opened on the surface of the wire feeding sleeve plate (75) facing the reserved outlet (83). A limiting circular opening plate (76) is fixedly installed at the bottom of the wire feeding sleeve plate (75). A circular opening is also opened on the limiting circular opening plate (76) facing the reserved outlet (83). A parallel slot is opened on the side of the circular opening. A servo hydraulic rod (77) is fixedly installed in the parallel slot.

6. The automatic welding equipment for photovoltaic panel frames according to claim 5, characterized in that, A cutting head (78) is fixedly installed on the output end of the servo hydraulic rod (77). The cutting head (78) is a circular head that can closely fit the inner wall of the circular opening on the limiting circular opening plate (76). A third servo motor (73) is fixedly installed on the top side of the hanger (72). A wire winding disc (74) is fixedly installed on the output end of the third servo motor (73). A flux-cored welding wire is wound on the wire winding disc (74). A magnetic ring plate (95) is movably installed on the side of the circular hollow plate (92). A reserved welding frame (98) for assembling a welding gun is opened on the side of the bent insert plate (91). A preheating cylindrical sleeve (10) is assembled on the reserved outlet (83) at the bottom of the second protective shell (81).

7. A method of using an automatic welding equipment for photovoltaic panel frames, characterized in that, The automatic welding equipment for photovoltaic panel frames, as described in any one of claims 1 to 6, includes the following steps: S1: First, the third servo motor (73) drives the wire winding disc (74) to rotate and release the flux-cored welding wire. The welding wire enters the second protective housing (81) through the wire feeding sleeve (75) and the limiting round mouth plate (76). The servo hydraulic rod (77) drives the cutting head (78) to cut the welding wire into fixed lengths. The treatment liquid in the liquid supply annular cavity (89) is applied to the surface of the welding wire through the brush ring (88). The roller sleeve (85) rotates in opposite directions to transport the welding wire downward. S2: Then, the welding wire passes through the preheating cylindrical sleeve (10) for preheating. The servo robotic arm (4) moves the drive module (5) and the auxiliary welding module (9) to the outside of the contact end face of the two sets of frame plates to be welded, and inserts the end of the welding wire together with the auxiliary welding module (9) between the two corner end faces of the frame. S3: Finally, the second servo motor (69) drives the second protective housing (81) to slide 180 degrees along the second arc-shaped slide (68) in the first arc. The welding gun heats and melts the welding wire at the center of the circular hollow plate (92) and spreads it out. Then the first servo motor (51) drives the second semi-circular arc-shaped limiting frame (61) to rotate 180 degrees along the first semi-circular arc-shaped limiting frame (54) in the second arc, so that the auxiliary welding module (9) completes the complete coverage of the welding end face.

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