Photovoltaic panel corner brace welding equipment based on frame corner accurate alignment system

Abstract

The invention discloses photovoltaic panel corner connector welding equipment based on a frame corner accurate alignment system, and relates to the technical field of photovoltaic module manufacturing, a rack is provided with a conveying positioning mechanism used for bearing and conveying a photovoltaic frame profile; the corner connector feeding mechanism is used for providing corner connectors for inserting stations arranged on the rack; a visual alignment system; a plug-in welding execution unit; and a limiting mechanism. According to the invention, the deviation is detected and compensated in real time through the visual alignment system, the problem of insufficient alignment precision caused by lack of real-time feedback in the prior art is solved, and submillimeter-level accurate alignment is realized. Meanwhile, the integrated plug-in mounting and welding integrated unit integrates plug-in mounting and welding processes at the same station, so that secondary positioning errors caused by workpiece transfer are eliminated, the production efficiency and the connection consistency are remarkably improved, and the welding strength and reliability are ensured.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module manufacturing technology, and in particular to a photovoltaic panel corner code welding device based on a precise corner alignment system. Background Technology

[0002] In photovoltaic module manufacturing, aluminum alloy frames are added to the edges to provide structural support and protection. The corners of the frame are connected to two perpendicular frame profiles via L-shaped metal corner brackets. The quality of this connection directly determines the overall structural strength and long-term reliability of the module. To automate the corner bracket connection, existing technologies mainly employ assembly schemes based on rigid mechanical positioning. For example, patent document CN221134519U discloses an automatic photovoltaic frame corner bracket assembly machine, which achieves automatic conveying, alignment, and insertion of profiles and corner brackets through the coordinated actions of conveyor belts, positioning blocks, and cylinders.

[0003] However, these automation solutions face the following prominent challenges in practical applications, making it difficult to meet the demands for high-efficiency and high-precision production: First, the alignment process lacks real-time feedback and precise compensation capabilities. Existing solutions rely on preset mechanical positioning, which is an open-loop control system. It cannot detect and proactively compensate for wear or drift in the positioning mechanism caused by tolerances in the frame profile processing, errors in the cut end face, or long-term equipment operation. This results in unstable alignment accuracy between the corner bracket and the frame splicing groove, making it difficult to achieve the sub-millimeter repeatability required for higher-strength connection processes, such as laser welding, and easily leading to poor insertion or subsequent welding defects.

[0004] Secondly, the separation of insertion and welding processes affects overall efficiency and consistency. Currently, the insertion and welding of corner brackets are usually completed in two separate machines or workstations. The transfer of workpieces between workstations not only increases the production cycle time but may also cause the precisely inserted corner brackets to loosen or shift during the transfer process, resulting in secondary positioning errors. This separation of processes makes it difficult to guarantee the stability and consistency of the entire connection process, hindering efficient and continuous automated production. Therefore, developing an automated device capable of real-time detection and dynamic compensation of alignment deviations, while integrating insertion and welding functions, is an urgent industrial need for achieving high-precision, high-reliability, and high-efficiency production of photovoltaic frame corner bracket connections. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problems mentioned in the background art, such as insufficient corner code alignment accuracy due to lack of real-time feedback, and low production efficiency and connection consistency problems caused by the separation of insertion and welding processes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A photovoltaic panel corner code welding device based on a precise corner alignment system includes: The frame is equipped with a conveying and positioning mechanism to carry and transport photovoltaic frame profiles; An angle bracket feeding mechanism is used to provide angle brackets to the insertion station located on the frame; The visual alignment system includes an image acquisition device and a controller located above the insertion station. The controller is used to generate a positional deviation signal between the corner splicing slot and the corner code of the photovoltaic frame based on the acquired image. The insertion welding execution unit is mounted above the insertion station via a gantry frame, and includes an insertion head connected along the gantry frame via a drive module, and a laser welding head associated with the insertion head; The limiting mechanism is used to convey the conveying and positioning mechanism to the photovoltaic frame profile block in the insertion station area for insertion operation; The insertion head is used to press the corner bracket into the splicing groove at the corner of the photovoltaic frame profile, and the laser welding head is used to weld the pressed corner bracket to the splicing joint of the frame.

[0007] Preferably, the image acquisition device is a high-resolution industrial camera, and the controller has a built-in image processing module. The image processing module is configured to identify the feature contours of the border splicing slots and corner codes and calculate the coordinate deviations of their centers or corner points.

[0008] Preferably, the conveying and positioning mechanism includes a servo-driven conveying track, with conveying platforms that can slide along the top two sides of the conveying track. The conveying platforms on both sides are used to support and transport photovoltaic frame profiles. The two conveying tracks on both sides are adjustablely connected by an adjusting screw to accommodate the conveying of photovoltaic frame profiles of different widths. The adjusting screw passes through the side plate of the frame through a bearing and is connected to a drive source that drives its rotation.

[0009] Preferably, the corner code feeding mechanism includes a vibratory feeder and a pre-positioning guide groove. One end of the pre-positioning guide groove is connected to the discharge port of the vibratory feeder, and the other end extends to the corner code temporary storage position near the insertion station. The corner code temporary storage position is provided with a push block driven by a drive cylinder. The push block can move along a preset path to push the corner code to the photovoltaic frame profile port located at the insertion station.

[0010] Preferably, the insertion head of the insertion welding execution unit is driven by a drive module, and the laser welding head is located on the drive module and next to the insertion head, so that the working areas of the insertion head and the laser welding head are located at the same station.

[0011] Preferably, the laser welding head has a floating buffer structure at its front end. The floating buffer structure includes a connecting seat fixed to the front end of the laser welding head, a pressure sensor mounted on the connecting seat, and at least one set of buffer guide rod assemblies. The buffer guide rod assembly includes a guide rod and a buffer spring sleeved on the guide rod. One end of the guide rod is connected to the connecting seat, and the other end is equipped with a welding nozzle. The buffer guide rod assembly allows the welding nozzle to float relative to the connecting seat in a direction perpendicular to the splicing seam between the photovoltaic frame and the corner code. The pressure sensor is signal-connected to the equipment control system. The control system adjusts the downward displacement of the insertion welding execution unit or the feed amount of the laser welding head according to the pressure signal to maintain the welding contact pressure within a preset range.

[0012] Preferably, it also includes an intelligent collaborative control system, which includes a programmable logic controller (PLC). The PLC has a pre-stored database of process parameters corresponding to different frame and corner code specifications, and is programmed with linkage control logic. The linkage control logic is configured to receive a corner code insertion signal and, after verification, trigger the laser welding head to perform welding; after welding is completed, it triggers the conveying and positioning mechanism to move the workpiece out and send it to the next workpiece.

[0013] Preferably, the limiting mechanism includes an extendable or retractable blocking member, a driving component for driving the blocking member to move, and a position detection component for detecting the profile's position. Both the driving component and the position detection component are signal-connected to the intelligent collaborative control system. The intelligent collaborative control system controls the blocking member to move according to the detection signal, so as to achieve the positioning and blocking of the profile at the insertion station.

[0014] Preferably, the intelligent collaborative control system further includes a human-machine interface for calling up parameter sets in the process parameter database and enabling one-click switching of equipment operating modes.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention uses a closed-loop feedback and spatial compensation system of visual alignment to correct profile tolerances and equipment errors in real time, ensuring that the corner code and the splicing slots of the two side frames achieve sub-millimeter level precision docking, fundamentally avoiding poor insertion and subsequent false soldering or misalignment caused by misalignment.

[0016] By sequentially completing insertion and welding at the same station using an integrated unit, secondary positioning errors and production interruptions caused by workpiece transfer are eliminated. Combined with the floating buffer and closed-loop pressure control of the welding head, it can adapt to workpiece gaps, ensuring stable input of welding pressure and energy, thereby obtaining welds with consistent shape and reliable strength, and improving process continuity and connection reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the rear view structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the right-side view structure of the present invention.

[0021] Figure 4 This is a partial structural diagram of the insertion station of the present invention.

[0022] Figure 5 This is a schematic diagram of the floating buffer structure at the insertion station of the present invention.

[0023] Figure 6 This is a partial structural diagram of the limiting mechanism at the insertion station of the present invention.

[0024] Drawing number descriptions: 1. Frame; 11. Insertion station; 12. Corner code temporary storage position; 2. Conveying and positioning mechanism; 21. Conveying track; 22. Conveying table; 23. Adjusting screw; 3. Corner code feeding mechanism; 31. Vibratory feeder; 32. Pre-positioning guide groove; 33. Drive cylinder; 34. Push block; 4. Vision alignment system; 41. High-resolution industrial camera; 5. Insertion welding execution unit; 50. Gantry frame; 51. Insertion head; 52. Laser welding head; 53. Floating buffer structure; 531. Connecting seat; 532. Pressure sensor; 533. Buffer guide rod assembly; 534. Welding nozzle; 6. Limiting mechanism; 61. Blocking component; 62. Drive assembly; 63. Position detection assembly; 7. Intelligent collaborative control system. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] The following description is intended to disclose the invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0027] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this invention and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this invention.

[0028] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0029] Please see Figure 1 - Figure 6 A photovoltaic panel corner code welding device based on a precise corner alignment system includes: a frame 1, on which a conveying and positioning mechanism 2 is installed for carrying and conveying photovoltaic frame profiles; a corner code feeding mechanism 3 for providing corner codes to an insertion station 11 located on the frame 1; a vision alignment system 4, including an image acquisition unit and a controller located above the insertion station 11, the controller being used to generate a positional deviation signal between the splicing groove of the photovoltaic frame corner and the corner code based on the acquired image; an insertion welding execution unit 5, which is installed above the insertion station 11 via a gantry 50, including an insertion head 51 connected along the gantry 50 via a drive module, and a laser welding head 52 associated with the insertion head 51; and a limiting mechanism 6 for conveying the conveying and positioning mechanism 2 to the photovoltaic frame profile blocking area within the insertion station 11 for insertion operation; wherein, the insertion head 51 is used to press the corner code into the splicing groove of the corner of the photovoltaic frame profile, and the laser welding head 52 is used to weld the pressed corner code to the splicing joint of the frame.

[0030] The photovoltaic panel corner code welding equipment based on the frame corner precision alignment system of this application is mainly composed of a frame 1, a conveying and positioning mechanism 2, a corner code feeding mechanism 3, a vision alignment system 4, and an insertion welding execution unit 5. It aims to solve the problems of low alignment accuracy, process separation, and inability to adapt to the high requirements of laser welding in the prior art.

[0031] The frame 1 forms the main support structure of the equipment. The conveying and positioning mechanism 2 is arranged along the length of the frame 1, responsible for the automatic conveying and initial positioning of the photovoltaic frame profiles. An insertion station 11 is set in the middle of the conveyor line or at a specific location. A corner code feeding mechanism 3 is located on one side of the frame 1, used to continuously supply L-shaped corner codes to the insertion station 11. A gantry frame 50 is spanned directly above the insertion station 11, on which an insertion welding execution unit 5 is mounted. This unit integrates an insertion head 51 for performing insertion actions and a laser welding head 52 for performing welding actions. An industrial camera from the vision alignment system 4 is also mounted on the gantry frame 50 or a nearby frame, providing an overview of the insertion station. A limiting mechanism 6 is installed on the entrance side of the insertion station 11 for precisely blocking the profiles. All mechanisms are centrally controlled by an intelligent collaborative control system 7.

[0032] It should also be noted that this equipment is designed with a modular structure, allowing for flexible integration into automated photovoltaic frame production lines. Specifically, the conveying and positioning mechanism 2) has a standardized interface at the infeed end, which can seamlessly connect with the preceding frame profile automatic feeding mechanism, such as a robotic arm picking platform or a stacking separation device, to achieve automatic profile reception. At its discharge end, it can also be connected to the following automatic unloading mechanism, such as a finished product transplanting machine or a palletizing robot, through the extension or docking device of the conveyor line, to automatically remove the frame components with completed corner welding and transport them to the next process, such as cleaning, inspection, or assembly stations. Thus, this equipment can serve as a core unit embedded in a complete continuous production line.

[0033] The conveying and positioning mechanism 2 includes two parallel conveying tracks 21 driven by servo motors. Each conveying track 21 is equipped with multiple sliding conveyor platforms 22 for directly carrying and conveying photovoltaic frame profiles. A key design feature is the adjustable spacing between the two conveying tracks 21. This is achieved through at least one adjusting screw 23 with threads at both ends. This screw 23 is mounted on the side plate of the frame 1 via bearings. One conveying track 2 is connected to it via a bearing, and the other conveying track 2 is threadedly connected to it and driven by a handwheel or servo motor; this embodiment uses a handwheel as an example. Rotating the adjusting screw 23 synchronously drives the two conveying tracks 21 to move towards or away from each other, thereby precisely adapting to photovoltaic frame profiles of different widths and ensuring stable centering of the profiles during conveying, laying the foundation for subsequent visual alignment.

[0034] The corner bracket feeding mechanism 3 includes a vibratory feeder 31 and a pre-positioning guide groove 32 connected to it. The vibratory feeder 31 automatically arranges the randomly stacked corner brackets into an orderly manner and transports them to a corner bracket temporary storage position 12 near the insertion station 11 via the pre-positioning guide groove 32. A pusher block 34 driven by a drive cylinder 33 is provided at the temporary storage position 12. When the control system issues a feeding command, the drive cylinder 33 actuates, pushing the pusher block 34 along a straight path to accurately push the corner bracket in the temporary storage position 12 into the port of the photovoltaic frame profile already positioned at the insertion station 11, awaiting insertion.

[0035] The vision alignment system 4 mainly consists of a high-resolution industrial camera 41 and a controller with a built-in image processing module, typically an industrial computer or a high-performance PLC, as shown in the figure. The high-resolution industrial camera 41 is fixedly mounted directly above the insertion station 11 to ensure that its field of view completely covers the corner area of ​​the frame. Its workflow is as follows: after the photovoltaic frame profile is precisely positioned by the limiting mechanism 6, the high-resolution industrial camera 41 captures a high-definition image of the corner. The image processing module first uses algorithms such as edge detection and contour extraction to accurately identify the outline of the splicing groove at the ends of the two frame profiles and the outline of the corner code that has been pushed into place. Subsequently, the calculation module calculates the theoretical insertion position of the corner code based on the coordinate deviation between the geometric center or feature corner point of the splicing groove and the actual position. This deviation signal is sent to the intelligent collaborative control system 7 in real time. Through the aforementioned vision alignment and compensation system, sub-millimeter-level precise alignment of the corner code and the splicing groove can be achieved, meeting the requirements of subsequent laser welding processes.

[0036] The insertion welding execution unit 5 is the execution terminal that realizes the integration of insertion and welding. The entire unit is mounted above the insertion station 11 via a gantry 50. A high-precision drive module, such as a linear module or a servo electric cylinder, is mounted on the crossbeam of the gantry 50. The insertion head 51 and the laser welding head 52 are both mounted on this drive module. The insertion head 51 is driven by a vertical pneumatic or electric cylinder to perform the pressing action. The laser welding head 52 is fixed to the side of the insertion head 51, and its axial direction is aligned with the expected position of the weld seam.

[0037] A key improvement in this unit lies in the floating buffer structure 53 at the front end of the laser welding head 52. This structure includes a connecting seat 531 fixedly connected to the front end of the laser welding head 52; a pressure sensor 532 mounted on the connecting seat 531; and at least one set of buffer guide rod assemblies 533. The buffer guide rod assembly 533 consists of a guide rod and a buffer spring sleeved thereon. One end of the guide rod is movably connected to the connecting seat 531 and can slide, while the other end is fitted with a welding nozzle 534. When the welding nozzle 534 contacts the workpiece, the buffer spring is compressed, allowing the welding nozzle 534 to float in a direction perpendicular to the seam, thereby adapting to any minute gaps or non-flatness that may exist between the corner bracket and the frame groove. Simultaneously, the pressure sensor 532 monitors the contact pressure in real time and feeds the signal back to the control system. Based on this pressure signal, the control system dynamically fine-tunes the downward displacement of each insert welding execution unit 5 or the feed amount of the laser welding head 52 itself, thereby stabilizing the welding contact pressure within a preset optimal range, ensuring the consistency of laser energy input and welding quality.

[0038] The limiting mechanism 6 is used to achieve the final precise positioning of the profile at the insertion station 11. It includes a liftable or extendable blocking member 61 (in this embodiment, a stop block is used as an example), a drive assembly 62 that drives the blocking member 61 (such as a cylinder or electric push rod), and a position detection assembly 63 that detects whether the front end of the profile is in position (such as a photoelectric sensor or proximity switch). When the front end of the conveyed profile triggers the position detection assembly 63, a signal is transmitted to the intelligent collaborative control system 7. The intelligent collaborative control system 7 immediately commands the drive assembly 62 to actuate, causing the blocking member 61 to rise and precisely stop the profile at the preset position. After insertion welding is completed, the blocking member 61 descends, and the profile is conveyed out of the station.

[0039] The intelligent collaborative control system 7, acting as the brain of the equipment, integrates a programmable logic controller (PLC), a motion control card, a laser controller, etc. (details not shown). Its core lies in its pre-stored process parameter database and linkage control logic. The database stores corresponding camera calibration parameters, insertion pressure, welding power, speed, and floating pressure setpoints for different specifications of frame and corner code. The linkage control logic programs the entire workflow: starting from receiving the profile arrival signal, it sequentially triggers visual alignment → deviation compensation and insertion head 51 positioning → corner code pushing → insertion head 51 pressing and inserting → optional secondary visual verification → laser welding initiation → welding completion → resetting and removing the workpiece. The entire process is fully automated, requiring no manual intervention.

[0040] Working principle Operators use the human-machine interface of the intelligent collaborative control system 7 to select the current production border and corner code specifications. The control system automatically retrieves the corresponding complete set of parameters from the process parameter database to complete equipment initialization.

[0041] The servo-driven conveying and positioning mechanism 2 is activated, transporting the photovoltaic frame profile to the insertion station 11. The adjusted spacing of the conveying tracks 21 ensures that the profile is transported smoothly and centered.

[0042] When the front end of the profile triggers the position detection component 63 of the limiting mechanism 6, the control system immediately commands the drive component 62 to move, causing the blocking component 61 to rise and precisely position the profile at the insertion station 11. Subsequently, the high-resolution industrial camera 41 of the vision alignment system 4 captures an image of the corner of the frame. The image processing module quickly identifies and calculates the deviation between the actual position of the corner code and the theoretical position of the frame splicing groove, and sends this deviation data to the control system.

[0043] Based on the deviation data from visual feedback, the control system drives the overall drive module of the insertion welding execution unit 5 to make micro-movements to compensate for positional deviations, ensuring that the working centers of the insertion head 51 and the laser welding head 52 coincide with the theoretical alignment point. Next, the control system commands the drive cylinder 33 of the corner code feeding mechanism 3 to actuate, and the pusher block 34 precisely pushes the corner code from the temporary storage position 12 into the frame port. Then, driven by the drive module, the insertion head 51 presses down, firmly pressing the corner code into the splicing groove of the two frame members, completing the mechanical connection.

[0044] After the corner bracket is inserted into place, the control system instructs the laser welding head 52 to begin operation. The welding nozzle 534 contacts the workpiece surface under the action of a buffer spring, and the pressure sensor 532 activates. During welding, the guide rod and spring assembly of the floating buffer structure 53 allow the welding nozzle 534 to float with the undulations of the workpiece surface, preventing jamming or detachment. Simultaneously, the control system reads the pressure signal in real time. If the pressure deviates from the preset value, it fine-tunes the height of the actuator or the laser head feed to achieve closed-loop constant control of the welding pressure. Under this stable contact condition, the laser emits a high-energy beam, scanning and welding along the joint between the corner bracket and the frame to form a high-strength, well-sealed weld.

[0045] After welding is completed, the laser welding head 52 and the insertion head 51 are raised and reset, and the blocking component 61 of the limiting mechanism 6 descends. The conveying and positioning mechanism 2 restarts, moving the welded workpiece out of the insertion station 11, while simultaneously feeding in the next section of profile to be processed, and the equipment automatically enters the next work cycle. Thus, this invention, through integrated visual alignment and compensation, and integrated insertion and welding operations, effectively overcomes the problems of unstable alignment accuracy and process separation, achieving high-precision, high-efficiency, and high-consistency automated production.

[0046] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from the stated principles.

Claims

1. A photovoltaic panel corner code welding equipment based on a precise corner alignment system, characterized in that, include: A frame (1) is equipped with a conveying and positioning mechanism (2) for carrying and conveying photovoltaic frame profiles; Angle code feeding mechanism (3) is used to provide angle codes to the insertion station (11) located on the frame (1); The visual alignment system (4) includes an image acquisition device and a controller located above the insertion station (11). The controller is used to generate a position deviation signal between the corner splicing slot of the photovoltaic frame and the corner code based on the acquired image. The insertion welding execution unit (5) is mounted above the insertion station (11) via a gantry (50), and includes an insertion head (51) connected along the gantry (50) via a drive module, and a laser welding head (52) associated with the insertion head (51). The limiting mechanism (6) is used to convey the conveying positioning mechanism (2) to the photovoltaic frame profile block in the insertion station (11) area for insertion operation; The insertion head (51) is used to press the corner code into the splicing groove of the corner of the photovoltaic frame profile, and the laser welding head (52) is used to weld the corner code and the frame splicing joint after pressing.

2. The photovoltaic panel corner code welding equipment based on a precise corner alignment system according to claim 1, characterized in that, The image acquisition device is a high-resolution industrial camera (41), and the controller has a built-in image processing module. The image processing module is configured to identify the feature contours of the border splicing slots and corner codes and calculate the coordinate deviation of their center or corner points.

3. The photovoltaic panel corner code welding equipment based on a precise corner alignment system according to claim 1, characterized in that, The conveying and positioning mechanism (2) includes a servo-driven conveying track (21). The top two sides of the conveying track (21) are provided with conveying platforms (22) that can slide along it. The conveying platforms (22) on both sides are used to support and transport photovoltaic frame profiles. The two conveying tracks (21) on both sides are adjustablely connected by adjusting screws (23) to adapt to the conveying of photovoltaic frame profiles of different widths. The adjusting screws (23) pass through the side plate of the frame (1) through bearings and are connected to a drive source that drives its rotation.

4. The photovoltaic panel corner code welding equipment based on a precise corner alignment system according to claim 1, characterized in that, The corner code feeding mechanism (3) includes a vibratory plate (31) and a pre-positioning guide groove (32). One end of the pre-positioning guide groove (32) is connected to the discharge port of the vibratory plate (31), and the other end extends to the corner code temporary storage position (12) near the insertion station (11). The corner code temporary storage position (12) is provided with a push block (34) driven by a drive cylinder (33). The push block (34) can move along a preset path to push the corner code to the photovoltaic frame profile port located at the insertion station (11).

5. A photovoltaic panel corner code welding device based on a precise corner alignment system according to claim 1, characterized in that, The insertion head (51) of the insertion welding execution unit (5) is driven by the drive module, and the laser welding head (52) is located on the drive module and next to the insertion head (51), so that the working areas of the insertion head (51) and the laser welding head (52) are located at the same station.

6. A photovoltaic panel corner code welding device based on a precise corner alignment system according to claim 1, characterized in that, The laser welding head (52) has a floating buffer structure (53) at its front end. The floating buffer structure (53) includes a connecting seat (531) fixed to the front end of the laser welding head (52), a pressure sensor (532) on the connecting seat (531), and at least one set of buffer guide rod assemblies (533). The buffer guide rod assembly (533) includes a guide rod and a buffer spring sleeved on the guide rod. One end of the guide rod is connected to the connecting seat (531), and the other end is equipped with a welding nozzle (534). The buffer guide rod assembly (533) allows the welding nozzle (534) to float relative to the connecting seat (531) in a direction perpendicular to the splicing seam of the photovoltaic frame and the corner code. The pressure sensor (532) is connected to the equipment control system. The control system adjusts the downward displacement of the insertion welding execution unit (5) or the feed amount of the laser welding head (52) according to the pressure signal to maintain the welding contact pressure within a preset range.

7. A photovoltaic panel corner code welding device based on a precise corner alignment system according to claim 1, characterized in that, It also includes an intelligent collaborative control system (7), which includes a programmable logic controller. The programmable logic controller has a database of process parameters corresponding to different frame and corner code specifications, and is programmed with linkage control logic. The linkage control logic is configured to receive the corner code insertion signal and, after verification, trigger the laser welding head (52) to perform welding; after welding is completed, trigger the conveying and positioning mechanism (2) to move the workpiece out and send it into the next workpiece.

8. A photovoltaic panel corner code welding device based on a precise corner alignment system according to claim 7, characterized in that, The limiting mechanism (6) includes an extendable or retractable blocking member (61), a driving component (62) for driving the blocking member (61) to move, and a position detection component (63) for detecting the profile in place. The driving component (62) and the position detection component (63) are both connected to the intelligent collaborative control system (7) by signal. The intelligent collaborative control system (7) controls the blocking member (61) to move according to the detection signal, so as to realize the positioning and blocking of the profile at the insertion station (11).

9. A photovoltaic panel corner code welding device based on a precise corner alignment system according to claim 7, characterized in that, The intelligent collaborative control system (7) also includes a human-machine interface, which is used to call the parameter set in the process parameter database and realize one-click switching of the equipment working mode.

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