A welding machine for precise positioning and welding of photovoltaic panels and tabs.

Abstract

This utility model discloses a welding machine for precise positioning and welding of photovoltaic panels and tabs. It includes a worktable, an X-axis linear module, a Y-axis linear module, a Z-axis linear module mounted on the worktable, a temperature controller, a control cabinet, a soldering pen and solder wire feeding mechanism that move and weld via a three-axis drive mechanism, and a positioning mold base for mounting and fixing the materials to be welded. The soldering pen and solder wire feeding mechanism is mounted on the Z-axis linear module. The worktable also includes a flipping mechanism for flipping the positioning mold base and a contact temperature sensor for measuring the temperature of the soldering pen tip upon contact. This effectively solves the problems of inaccurate temperature control in existing photovoltaic panel soldering machines, leading to incomplete soldering and cracking. It enables double-sided welding of the photovoltaic panel and tabs in a single installation, and allows for disassembly and replacement of the product during welding, effectively improving work efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of semiconductor electronic device welding equipment, specifically to a welding machine for precise positioning welding of photovoltaic panels and tabs. Background Technology

[0002] Semiconductor-based chip electronic devices generally suffer from brittleness and low mechanical strength, making them highly susceptible to cracking and chipping due to clamping stress during various production and assembly stages, or cracking during welding due to excessive differences in thermal expansion coefficients. For example, photovoltaic panels made of semiconductors generally require mating with tabs to achieve circuit conduction when assembled into a finished product.

[0003] Current automatic soldering machines, when soldering semiconductor-based chip electronic devices to tabs, generally only allow soldering of single-piece assembled electronic devices to tabs to avoid damage caused by concentrated stress points during clamping and flipping. Furthermore, during the soldering process, temperature sensors only monitor the temperature at the soldering point, without accurately monitoring the temperature of the soldering tip. This leads to a high risk of photovoltaic panel cracking due to overheating during continuous soldering. Although some soldering machines are equipped with air blowing mechanisms to cool the soldering tip, short-term blowing is insufficient to guarantee that the tip temperature will drop to a safe level after prolonged use. Moreover, during soldering, because the soldering tip must contact the solder wire, solder lumps can adhere to the tip. Existing air blowing devices only cool the tip, leading to the problem of excessive solder at certain solder joints during precision soldering, where the solder lumps adhering to the tip melt again and re-adhere to the joint. Utility Model Content

[0004] To address certain technical problems existing in the prior art, this application aims to provide a welding machine for precise positioning and welding of photovoltaic panels and tabs. This machine effectively solves problems such as incomplete welding and cracking caused by inaccurate temperature control in existing photovoltaic panel welding pens. It enables double-sided welding of the photovoltaic panel and tabs in a single installation, and allows for disassembly and replacement of the product during welding, significantly improving work efficiency. To solve the aforementioned technical problems, this application adopts the following technical solution: A welding machine for precise positioning and welding of photovoltaic panels and tabs includes a worktable, a three-axis drive mechanism mounted on the worktable, a temperature controller for controlling the soldering temperature, a control cabinet for setting equipment parameters and controlling the arrangement of components, a soldering pen and solder wire conveying mechanism that moves and performs welding via the three-axis drive mechanism, and a positioning mold for mounting and fixing the materials to be welded. The three-axis drive mechanism includes an X-axis linear module horizontally mounted on the worktable via a bracket, a Y-axis linear module slidably mounted on the X-axis linear module, and a Z-axis linear module slidably mounted on the Y-axis linear module. The soldering pen and solder wire conveying mechanism is mounted on the Z-axis linear module. The worktable is also provided with a flipping mechanism for flipping the positioning mold and a contact temperature sensor for measuring the temperature of the soldering pen tip upon contact.

[0005] Two photovoltaic panels and tabs in the materials to be welded are limited and fixed by the positioning mold base. Then, the control cabinet controls the three-axis drive mechanism to move the soldering pen and solder wire to the solder joint between a photovoltaic panel and a tab for welding. The positioning mold base is then flipped by the flipping mechanism to achieve double-sided welding. Before welding, the soldering pen tip can be moved to the contact temperature sensor for accurate temperature detection.

[0006] Preferably, the workbench is also equipped with an air blower nozzle, through which the solder lumps on the soldering pen are blown off.

[0007] Preferably, the workbench is provided with a solder block storage box, and one side of the solder block storage box is provided with an air blowing adjustment mechanism for fixing the air blowing nozzle cleaner. The blowing angle of the air blowing nozzle cleaner is adjusted and fixed by the air blowing adjustment mechanism.

[0008] Preferably, the air blowing adjustment mechanism includes a first connecting seat on one side of the tin block storage box, a first lifting rod on the first connecting seat, a first connecting block on the first lifting rod, and a second connecting block rotatably connected at one end to the first connecting block. The air blowing nozzle is located on the second connecting block. The air blowing nozzle is adjusted for lifting and rotation via the first lifting rod and for tilt via the second connecting block.

[0009] Preferably, the workbench is also provided with a slide cylinder for welding support of the bottom of the outer end of the positioning mold base in the welding state. The slide cylinder pneumatically supports the material above, avoiding unnecessary movement of the material during welding.

[0010] Preferably, each linear module is equipped with a slide table.

[0011] Preferably, the solder wire conveying mechanism includes a wire roll fixing seat, an automatic wire breaker for pre-treating the solder wire during welding, and a wire feeder for accurately and stably conveying the treated solder wire. The solder wire drawn out from the solder roll on the fixing seat is pre-treated by the automatic wire breaker and then conveyed to the wire feeder for precise feeding into the welding area.

[0012] Preferably, the slide of the Z-axis linear module is provided with a solder pen adjustment mechanism, and the wire feed head is provided on the solder pen adjustment mechanism. The position of the solder pen and the solder wire relative to the Z-axis linear module can be finely adjusted by the solder pen adjustment mechanism.

[0013] Preferably, the soldering pen adjustment mechanism includes a second connecting seat, an angle adjustment bracket disposed on the second connecting seat, and a height adjustment bracket disposed on the angle adjustment bracket, wherein the soldering pen is disposed on the height adjustment bracket.

[0014] Preferably, the angle adjustment bracket includes a fixing plate with one end disposed on the second connecting seat and an arc-shaped connecting hole disposed on the fixing plate, and the height adjustment bracket is disposed in the arc-shaped connecting hole.

[0015] Preferably, the height adjustment bracket includes a base, a slide rail on the base, a slide block slidably disposed on the base, and a limiting mechanism disposed on one side of the slide block. The soldering pen is fixed on the slide block, and the slide block is slidably adjusted and fixed along the slide rail by the limiting mechanism.

[0016] Preferably, the limiting mechanism includes ear holes respectively provided on one side of the base and the slide, an adjusting screw provided between the two ear holes, and a tension spring sleeved on the adjusting screw. The relative position between the base and the slide is adjusted by the adjusting screw.

[0017] Preferably, one side of the welding pen adjustment mechanism is further provided with a welding wire adjustment bracket for fine adjustment of the wire feeding head.

[0018] Preferably, the welding wire adjustment bracket includes an annular adjustment seat at the bottom of the slide, a first connecting arm on the annular adjustment seat, and a multi-angle adjustment seat on the first connecting arm. The wire feed head is disposed on the multi-angle adjustment seat. The height and tilt angle of the wire feed head relative to the welding pen are adjusted by the multi-angle adjustment seat, and its position relative to the side of the welding pen is adjusted by the annular adjustment seat.

[0019] Preferably, the annular adjusting seat is provided with an arc-shaped annular adjusting hole, and one end of the first connecting arm is disposed on the annular adjusting hole.

[0020] Preferably, the multi-angle adjustment seat includes a second lifting rod disposed on the first connecting arm, a first rotating shaft disposed at the lower end of the second lifting rod, a second rotating shaft for fixing the wire feeding head, and a second connecting arm disposed between the first rotating shaft and the second rotating shaft.

[0021] Preferably, the flipping mechanism includes a rotary cylinder and a clamp disposed on the rotary cylinder, and the positioning mold base is mounted on the clamp.

[0022] Preferably, the bottom of the flipping mechanism is further provided with a rotating mechanism, and the rotating mechanism is provided with at least two flipping mechanisms with the positioning mold base.

[0023] Preferably, the rotating mechanism includes a rotating platform mounted on the operating table, a servo motor for controlling the rotation of the rotating platform, and a mounting base disposed on the rotating platform, with the flipping mechanism disposed on the mounting base.

[0024] Preferably, the positioning mold base includes a first positioning rod fixed on the clamp, two limiting rods with one end rotatably connected to both ends of the first positioning rod, a base disposed between the two limiting rods, a second positioning rod with one end rotatably connected to one of the limiting rods, and detachable pressure plates disposed on the upper and lower sides of the base. The two photovoltaic panels are pressed and attached to the upper and lower sides of the base by the pressure plates, and the electrode tabs are pressed and positioned by the first positioning rod and / or the second positioning rod.

[0025] Preferably, a limiting groove is provided between the two limiting rods, and a pin is provided in the limiting groove of one of the limiting rods, and the base is fixed in the limiting rod by the pin.

[0026] Preferably, the limiting rod is provided with a positioning groove, the two sides of the pressure block are provided with protrusions that match the positioning groove, and the pressure plate and / or the positioning groove are provided with magnetic blocks.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows: First, the temperature sensor is used to specifically detect the temperature of the soldering iron tip before soldering. The temperature of the soldering iron is calibrated by the temperature sensor. For example, when the temperature of the contact temperature sensor is inconsistent with the temperature controller, the temperature of the temperature controller can be adjusted, or the temperature controller or control cabinet components can be replaced to make the temperature of the contact temperature sensor consistent with the optimal melting temperature of the solder wire. Ultimately, the goal is to make the temperature of the contact temperature sensor consistent with the temperature controller display, thus avoiding damage to the photovoltaic panel caused by the soldering iron tip being too hot.

[0028] Secondly, the air blowing mechanism is mainly used to blow away the solder sticks adhering to the soldering iron tip, so as to avoid the solder sticks adhering to the soldering iron tip and causing excessive solder or cold solder joints in the next soldering. At the same time, it can also cool down the soldering iron.

[0029] Third, the clamping mechanism adopts a rotary dual-station design, and each station can be flipped by a flipping mechanism, which enables double-sided welding products to be automatically flipped after one installation and complete the double-sided welding. At the same time as welding, the product can be disassembled and replaced, which effectively improves work efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention without the control cabinet installed; Figure 3 This is a schematic diagram of the combined structure of the contact temperature sensor, the tin block storage box, and the air blow nozzle cleaner in this utility model, showing the specific structure of the air blow adjustment mechanism. Figure 4 This is a partially enlarged view of the welding wire adjustment bracket and welding pen adjustment mechanism mounted on a three-axis drive mechanism in this utility model. Figure 5 This is a schematic diagram of the front assembly structure of the welding wire adjustment bracket and the welding pen adjustment mechanism in this utility model; Figure 6 This is a schematic diagram of the rear assembly structure of the welding wire adjustment bracket and the welding pen adjustment mechanism in this utility model; Figure 7 This is a diagram showing the assembly of the product in this utility model, where the product is mounted on the flipping mechanism via a positioning mold base. Figure 8 This is an exploded view of the combined state of the flipping mechanism and the positioning mold base in this utility model; Figure 9 This is a diagram showing the combination of two flipping mechanisms connected by a rotating mechanism in this utility model; Figure 10 This is a schematic diagram of the rotating mechanism structure with a position sensor and a positioning block in this utility model; In the diagram: 1. Slide cylinder; 2. Air blow nozzle cleaner; 3. Solder block storage box; 4. Temperature controller; 5. Contact temperature sensor; 6. Solder wire adjustment bracket; 61. Multi-angle adjustment seat; 611. Second lifting rod; 612. Second connecting arm; 613. First rotating shaft; 614. Second rotating shaft; 62. First connecting arm; 63. Annular adjustment hole; 64. Annular adjustment seat; 7. Solder pen adjustment mechanism; 71. Second connecting seat; 72. Angle adjustment bracket; 721. Fixing plate; 722. Arc-shaped connecting hole; 73. Height adjustment bracket; 731. Slide seat; 732. Slide rail; 733. Base; 734. Limiting mechanism; 7341. Adjusting screw; 7342. Tension spring; 7343. Ear hole; 8. Solder wire conveying mechanism; 81. Wire roll fixing seat; 82. Automatic wire breaker; 83. Wire feeder; 9. Solder pen; 1 0. Three-axis drive mechanism; 101. X-axis linear module; 102. Y-axis linear module; 103. Z-axis linear module; 11. Tilting mechanism; 111. Rotary cylinder; 112. Fixture; 12. Positioning mold base; 121. First positioning rod; 122. Magnetic block; 123. Protrusion; 124. Limiting rod; 125. Second positioning rod; 126. Positioning groove; 127. Pressure plate; 128. Base; 12 9. Limiting slot; 130. Pin; 13. Feeding tray; 14. Rotating mechanism; 141. Rotating platform; 142. Servo motor; 143. Mounting base; 144. Turntable; 145. Rotating seat; 15. Workbench; 16. Control cabinet; 17. Air blowing adjustment mechanism; 171. First connecting seat; 172. First lifting rod; 173. First connecting block; 174. Second connecting block; 18. Fixed shaft; 19. Position sensor; 20. Positioning block; 100. Electrode; 200. Photovoltaic panel. Detailed Implementation

[0031] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0032] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0034] Example 1: like Figure 1 and Figure 2 As shown, a welding machine for precise positioning and welding of photovoltaic panels and tabs includes a worktable 15, a three-axis drive mechanism 10 mounted on the worktable 15, a temperature controller 4 for controlling the soldering temperature, a control cabinet 16 for setting equipment parameters and controlling the arrangement of components, a soldering iron 9 that moves and performs welding via the three-axis drive mechanism 10, a solder wire feeding mechanism 8, and a positioning mold base 12 for mounting and fixing the materials to be welded. The worktable 15 is also equipped with a flipping mechanism 11 for flipping the positioning mold base 12, and a soldering iron for the soldering iron 9. The contact temperature sensor 5 measures the temperature after contact with the head. Two photovoltaic panels 200 and tabs 100 in the material to be welded are fixed by the positioning mold base 12. The control cabinet 16 then controls the three-axis drive mechanism 10 to move the soldering pen 9 and solder wire to the solder joint between a photovoltaic panel 200 and a tab 100 for welding. The positioning mold base 12 is then flipped by the flipping mechanism 11 to achieve double-sided welding. Before welding, the soldering pen 9 can be moved to the contact temperature sensor 5 for precise temperature detection. When the temperature of the contact temperature sensor 5 is inconsistent with the temperature controller 4: 1. Adjust the temperature of the temperature controller 4 to make the temperature of the contact temperature sensor 5 consistent with the optimal melting temperature of the solder wire; 2. Replace the temperature controller 4 or the components of the control cabinet 16 to ultimately achieve consistency between the temperature of the contact temperature sensor 5 and the temperature displayed by the temperature controller 4.

[0035] The material to be welded consists of, for example, two thin photovoltaic panels 200 and positive and negative tabs 100. During production, the two thin photovoltaic panels 200 are welded together with the positive and negative tabs 100 to form a conductive state. When welding using a welding machine, a positioning mold 12 is used to position and clamp the two photovoltaic panels 200 and tabs 100 to prevent displacement during welding. After welding one side of the photovoltaic panel 200 and tabs 100 is completed, the positioning mold 12 is rotated 180° by a flipping mechanism 11, so that the second photovoltaic panel 200 can be welded by a welding pen 9. The control cabinet 16 is used to set the equipment parameters and control the arrangement of the control components of the entire welding machine. The required functions can be realized through the operation panel and switches. The temperature controller 4 is used to precisely control the heating temperature of the soldering iron tip of the soldering pen 9. The three-axis drive mechanism 10 is installed on the operating table to control the position movement of the soldering pen 9 and the solder wire conveyor, so that the soldering pen 9 and the solder wire can accurately weld the solder joints. To prevent issues such as overheating of the soldering pen 9 leading to damage to the photovoltaic panel 200 or underheating leading to weak soldering, a contact temperature sensor 5 is installed on the workbench 15 to measure the temperature of the soldering tip of the soldering pen 9 upon contact. Before soldering each material or each photovoltaic panel 200, the soldering tip of the soldering pen 9 is moved to the contact temperature sensor 5 to detect its actual temperature. The detected temperature is then fed back to the controller and compared with the set temperature of the temperature controller 4. If the temperature is too high, it can be cooled naturally or by blowing air to reach the required temperature. If the temperature is too low, it can be raised in time. At the same time, it can also determine whether the temperature controller 4 is damaged or malfunctioning. This allows the soldering pen 9 to achieve precise temperature control when soldering the thin photovoltaic panel 200 and the tab 100, so that even when the photovoltaic panel 200 becomes thinner, there is no need to worry about damage caused by the soldering temperature deviation of the soldering pen 9.

[0036] Example 2: The following improvements are made based on Example 1: Figure 2 As shown, the workbench 15 is also equipped with an air blower nozzle 2, and the solder block on the solder pen 9 is blown off by the air blower nozzle 2.

[0037] When soldering, solder often adheres to the soldering iron tip, causing damage to the tip and reducing its lifespan. This also makes it difficult for subsequent solder to transfer smoothly to the solder joint, leading to cold solder joints or false solder joints. Furthermore, when the solder melts and mixes into the next solder joint, it results in excessive solder content, causing a rough, dull, and porous solder joint, reducing conductivity and mechanical strength. Therefore, to address these issues, an air blower nozzle 2 is installed on the workbench 15. When solder residue remains on the soldering iron tip, it can be blown off using the air blower nozzle 2, ensuring the accuracy and stability of the solder joints. Specifically, after each material or one side of a material is soldered, a solder blowing process is performed, effectively ensuring the cleanliness of the soldering iron tip of the soldering iron tip 9.

[0038] A further improvement is made in that the workbench 15 is provided with a solder block storage box 3, and one side of the solder block storage box 3 is provided with an air blowing adjustment mechanism 17 for fixing the air blowing nozzle cleaner 2. The blowing angle of the air blowing nozzle cleaner 2 is adjusted and fixed by the air blowing adjustment mechanism 17.

[0039] A solder block storage box 3 is also installed on the workbench 15. The air blower nozzle 2 is installed on one side of the solder block storage box 3 through the air blower adjustment mechanism 17. The air blower adjustment mechanism 17 can make the airflow direction of the air blower nozzle 2 aligned with the upper opening of the solder block storage box 3. When air blowing is needed, the soldering tip of the soldering pen 9 is moved to the opening of the solder block storage box 3, and then the liquid solder adhering to it is blown into the solder block storage box 3 by the air blower nozzle 2. When the soldering tip is blown by the air blower nozzle 2, not only can the liquid solder adhering to it be separated from the soldering tip, but the high temperature of the soldering pen 9 can also be cooled down quickly, so that the temperature does not exceed the soldering temperature. The blowing angle of the air blower nozzle 2 can be adjusted and fixed by the air blowing adjustment mechanism 17, which can prevent the solder from falling outside the solder block storage box 3. The side of the solder block storage box 3 has an exhaust pipe or exhaust hole. The high-pressure gas blown in by the air blower nozzle 2 can be discharged outward through the exhaust pipe or exhaust hole, avoiding the problem of the internal solder block being blown out again from the opening direction due to airflow rebound.

[0040] The solder block storage box 3 is fixed to the workbench 15 by a bracket, while the contact temperature sensor 5 is installed on top of the solder block storage box 3, thus minimizing the relative distance between the two. When the contact temperature sensor 5 detects that the temperature of the solder pen 9 is too high, it can quickly move to the front of the air blower nozzle 2 for cooling. In actual operation, the process flow is a cycle of: solder pen 9 heating, temperature measurement, soldering * N (N is the number of solder joints), blowing solder, temperature calibration, (blowing solder to cool down if the temperature is too high), and solder pen 9 heating. This process flow effectively controls the lifespan and temperature accuracy of the solder pen 9.

[0041] A further improvement is made to the air blowing adjustment mechanism 17, which includes a first connecting seat 171 on one side of the tin block storage box 3, a first lifting rod 172 on the first connecting seat 171, a first connecting block 173 on the first lifting rod 172, and a second connecting block 174 rotatably connected at one end to the first connecting block 173. The air blowing nozzle 2 is located on the second connecting block 174. The air blowing nozzle 2 is adjusted for lifting and rotation via the first lifting rod 172 and for tilt via the second connecting block 174.

[0042] The first connecting seat 171 is installed on one side of the solder block storage box 3. The air blowing adjustment mechanism 17 is fixedly connected to the solder block storage box 3 through the first connecting seat 171. One end of the first lifting rod 172 is inserted into the first connecting seat 171. By inserting and removing the first lifting rod 172, the height of the air blowing nozzle cleaner 2 can be precisely adjusted. At the same time, by rotating the first lifting rod 172, the horizontal direction of the air blowing nozzle cleaner 2 can also be adjusted. The first connecting block 173 is fixed to the first lifting rod 172 and is used to install the second connecting block 174. One end of the second connecting block 174 is rotatably connected to the first connecting block 173 through a screw or other structure. By rotating the second connecting block 174, the vertical tilt angle of the air blowing nozzle cleaner 2 can be adjusted. Thus, when the blowing angle and position of the air blowing nozzle cleaner 2 are precisely adjusted, multi-angle control can be achieved, so that the airflow reaches the required trajectory. This achieves precise solder blowing of the solder pen 9 while avoiding the problem of solder backflow.

[0043] Example 3: Further improvements can be made to any of the above embodiments, such as... Figure 2 As shown, the workbench 15 is also equipped with a slide cylinder 1 for welding support of the bottom of the outer end of the positioning mold base 12 in the welding state.

[0044] When the length of the positioning mold base 12 reaches a certain distance, during the welding of the outer end solder joints, the soldering pen 9 needs to contact the solder joints, causing the front end of the positioning mold base 12 to generate a downward force. This results in the material to be welded tilting under stress and a certain displacement, leading to deviations in solder joint accuracy. Furthermore, even with a support structure, tilting and bending can occur during prolonged use. Therefore, to ensure the flatness of the material and prevent displacement during soldering, a sliding cylinder 1 is installed on the worktable 15 to support the bottom of the outer end of the positioning mold base 12 during welding. Before welding, the piston rod of the sliding cylinder 1 extends, forming a pneumatic support structure at the bottom of the front end of the material to be welded, thus preventing unnecessary movement or bending of the material during welding.

[0045] Example 4: Further improvements can be made to any of the above embodiments, such as... Figure 2 As shown, the three-axis drive mechanism 10 includes an X-axis linear module 101 horizontally mounted on the worktable 15 via a bracket, a Y-axis linear module 102 slidably mounted on the X-axis linear module 101, and a Z-axis linear module 103 slidably mounted on the Y-axis linear module 102. The soldering pen 9 and the solder wire feeding mechanism 8 are mounted on the Z-axis linear module 103. Each linear module is equipped with a slide table. The three-axis drive mechanism 10 can be moved and controlled in multiple modes through the control cabinet 16, thereby reaching any position in the horizontal direction. This structure is technologically mature and has high control precision.

[0046] Example 5: Further improvements can be made based on any of the above embodiments, such as... Figure 4 As shown, the solder wire conveying mechanism 8 includes a wire roll fixing seat 81, an automatic wire breaker 82 for pre-treating the solder wire during welding, and a wire feeder 83 for accurately and stably conveying the treated solder wire. The solder wire drawn out from the solder roll on the fixing seat is pre-treated by the automatic wire breaker 82 and then conveyed to the wire feeder 83 for accurate feeding into the welding area.

[0047] The entire roll of solder is installed on the wire roll holder 81. After the solder wire is pre-treated by the automatic wire breaker 82, it is inserted into the wire feeder 83. The wire feeder 83 accurately feeds the solder wire to the soldering area, thereby achieving the purpose of automatic wire feeding. The structure is simple and the wire feeding amount is precisely controlled.

[0048] Example 6: The following improvements are made based on Example 4: Figures 4-6As shown, the Z-axis linear module 103 is provided with a solder pen adjustment mechanism 7 on the slide table, and the wire feed head 83 is provided on the solder pen adjustment mechanism 7. The position of the solder pen 9 and the solder wire relative to the Z-axis linear module 103 can be finely adjusted by the solder pen adjustment mechanism 7.

[0049] Existing welding machines have relatively complex structures and require many components when adjusting the relative positions of the wire feeder 83 and the solder pen 9. Furthermore, the flexibility for fine-tuning their relative positions in a particular direction is insufficient, especially for fine-tuning in the horizontal direction and tilt angle, where the involved mechanisms are complex or nonexistent. Adjustments are also cumbersome when different angles and relative positions are required for different products. When soldering solder joints on the material to be soldered using the solder pen 9 and solder wire, a certain tilt between the solder pen 9 and the solder joint is necessary to ensure a good solder joint effect. Therefore, a solder pen adjustment mechanism 7 is installed on the slide of the Z-axis linear module 103 to adjust the position of the solder pen 9 and the solder wire. It can quickly adjust the relative position of the solder pen 9 and the wire feed head 83 from multiple angles and in all directions, so that the automatic welding equipment can achieve precise welding when welding thin sheet products such as semiconductor photovoltaic panels 200. This solves the problem of high skill requirements and low production efficiency of manual welding, and the solder joints are highly consistent. It also avoids the problem of damage to the solder pen 9 when it moves too much. The adjustment structure is simple and highly flexible.

[0050] A further improvement is made to the soldering pen adjustment mechanism 7, which includes a second connecting seat 71, an angle adjustment bracket 72 disposed on the second connecting seat 71, and a height adjustment bracket 73 disposed on the angle adjustment bracket 72, wherein the soldering pen 9 is disposed on the height adjustment bracket 73.

[0051] When adjusting the soldering pen 9, it is mounted on the height adjustment bracket 73, which allows for precise vertical height adjustment. The angle adjustment bracket 72 adjusts the tilt angle of the height adjustment bracket 73, thereby adjusting the tilt of the soldering pen 9 and ultimately the tilt between the soldering pen 9 and the solder joint. One end of the angle adjustment bracket 72 is mounted on the second connecting seat 71 via a fixed shaft 18. Rotating the fixed shaft 18 allows for horizontal rotation of the angle adjustment bracket 72, enabling circumferential adjustment of the soldering pen 9's position relative to the solder joint. This allows the soldering pen 9 to be installed in the designated position as needed during installation.

[0052] A further improvement is made to the angle adjustment bracket 72, which includes a fixing plate 721 with one end disposed on the second connecting seat 71, an arc-shaped connecting hole 722 disposed on the fixing plate 721, and the height adjustment bracket 73 disposed in the arc-shaped connecting hole 722.

[0053] The fixing plate 721 is mounted on the second connecting seat 71 via the fixing shaft 18. An arc-shaped connecting hole 722 is provided on the fixing plate 721. The height adjustment bracket 73 can be installed in the arc-shaped connecting hole 722 simply by means of screws or other structures. When the connecting end of the height adjustment bracket 73 moves along the arc-shaped connecting hole 722, the tilt angle of the height adjustment bracket 73 and the soldering pen 9 will change accordingly, thereby realizing the angle adjustment of the soldering pen 9. Adjusting the tilt angle of the height adjustment bracket 73 is simple and convenient. The two ends of the fixing shaft 18 can be detachably fixed by clamps, making disassembly and rotation even simpler.

[0054] A further improvement is made to the height adjustment bracket 73, which includes a base 733, a slide rail 732 on the base 733, a slide block 731 slidably disposed on the base 733, and a limiting mechanism 734 on one side of the slide block 731. The soldering pen 9 is fixed on the slide block 731, and the slide block 731 is slidably adjusted and fixed along the slide rail 732 by the limiting mechanism 734.

[0055] The upper back of the base 733 is fixed in the arc-shaped connecting hole 722 by two bolts. The slide 731 is slidably connected to the base 733 via the slide rail 732. When the height of the soldering pen 9 is adjusted by the height adjustment bracket 73, the slide 731 can move up and down along the slide rail 732 after being controlled by the limiting mechanism 734. When the desired position is reached, it can be fixed by the limiting mechanism 734, thus making the height adjustment of the soldering pen 9 simple and convenient, and the trajectory is more accurate during the adjustment process.

[0056] Based on the above technical solution, the limiting mechanism 734 is further improved by including ear holes 7343 respectively provided on one side of the base 733 and the slide 731, an adjusting screw 7341 provided between the two ear holes 7343, and a tension spring 7342 sleeved on the adjusting screw 7341. The relative position between the base 733 and the slide 731 is adjusted by the adjusting screw 7341.

[0057] Since existing soldering pens 9 or soldering guns are generally rigidly fixed after being fixed, if a gap deviation occurs between the soldering tip of the soldering pen 9 and the tab 100 during the production process, it will cause an impact on the tab 100 and the photovoltaic panel 200. If the impact is too large, it will damage the photovoltaic panel 200. Therefore, in order to prevent the soldering pen 9 from rebounding after an impact, thereby avoiding damage to the soldering pen 9 or the material to be soldered, a limiting mechanism 734 with a tension spring 7342 is added between the base 733 and the slide 731. The base 733 and slide 731 each form an ear hole 7343 by protruding outward 123 on one side. After the two ear holes 7343 are connected by the adjusting screw 7341, the two sides of the ear hole 7343 at the end of the slide 731 are clamped and limited by nuts, and the other end is limited by the end of the bolt. At the same time, a tension spring 7342 is fitted on the adjusting screw 7341. When the relative position between the base 733 and the slide 731 is adjusted by the limiting mechanism 734, the lifting control can be achieved by simply rotating the nut. The two ear holes 7343 are relatively fixed by the tension spring 7342, which can ensure that the slide 731 and the slide rail 732 will not move relative to each other without reason after adjustment. During welding, if the end of the soldering pen 9 makes excessive contact with a hard object, it can retract, thereby avoiding the problem of damage to the photovoltaic panel 200 when the front end of the soldering pen 9 impacts the electrode 100. For example, if the soldering pen 9 makes direct interference contact with the tab 100 due to incorrect installation or program control, the soldering pen 9 can be retracted upwards by the tension spring 7342 through the reverse force, thereby avoiding direct impact damage to the soldering head or product.

[0058] Example 7: The following improvements were made based on Example 6: Figures 4-6 As shown, a wire adjustment bracket 6 for finely adjusting the wire feed head 83 is also provided on one side of the solder pen adjustment mechanism 7. The wire adjustment bracket 6 allows adjustment of the relative position and angle of the wire feed head 83 relative to the solder pen 9, enabling precise feeding of the solder wire to the front end of the solder pen 9 for soldering. Before soldering, the relative positions of the solder pen 9 and the wire feed head 83 are precisely finely adjusted by the solder pen adjustment mechanism 7 and the wire adjustment bracket 6, allowing the automatic soldering equipment to achieve precise welding when soldering thin sheet products such as photovoltaic panels 200 to tabs 100. This solves the problems of high skill requirements and low production efficiency associated with manual soldering, and also ensures high consistency of the solder joints.

[0059] A further improvement is made to the welding wire adjustment bracket 6, which includes an annular adjustment seat 64 at the bottom of the slide block 731, a first connecting arm 62 on the annular adjustment seat 64, and a multi-angle adjustment seat 61 on the first connecting arm 62. The wire feed head 83 is located on the multi-angle adjustment seat 61. The height and tilt angle of the wire feed head 83 relative to the welding pen 9 are adjusted by the multi-angle adjustment seat 61, and its position relative to the side of the welding pen 9 is adjusted by the annular adjustment seat 64.

[0060] The wire feed head 83 is mounted on the multi-angle adjustment seat 61 and fixed by the relative position of the first connecting arm 62 and the annular adjustment seat 64. This allows for adjustment of the annular relative position of the wire feed head 83 with respect to the soldering pen 9. The height and tilt angle relative to the soldering pen 9 are adjusted by the multi-angle adjustment seat 61, thereby ensuring that the welding wire fed by the wire feed head 83 reaches the required position and angle with the end of the soldering pen 9.

[0061] A further improvement is that the annular adjustment seat 64 is provided with an arc-shaped annular adjustment hole 63, and one end of the first connecting arm 62 is provided on the annular adjustment hole 63.

[0062] One end of the first connecting arm 62 is mounted on the annular adjustment hole 63 by a screw or bolt. When the multi-angle adjustment seat 61 is adjusted in annular position along the soldering pen 9, the adjustment can be achieved simply by controlling the first connecting arm 62 to move along the annular adjustment hole 63. The operation is simple and convenient. Furthermore, by replacing the first connecting arm 62, the relative distance between the multi-angle adjustment seat 61 and the soldering pen 9 can also be controlled.

[0063] The multi-angle adjustment seat 61 includes a second lifting rod 611 disposed on the first connecting arm 62, a first rotating shaft 613 disposed at the lower end of the second lifting rod 611, a second rotating shaft 614 for fixing the wire feeding head 83, and a second connecting arm 612 disposed between the first rotating shaft 613 and the second rotating shaft 614.

[0064] The first rotating shaft 613 is sleeved on the second lifting rod 611. The second rotating shaft 614 is connected to the first rotating shaft 613 through the second connecting arm 612. The first rotating shaft 613 and the second rotating shaft 614 are rotatably connected to the second connecting arm 612. The second lifting rod 611 is clamped and fixed by the first connecting arm 62. After the first connecting arm 62 is released, the second lifting rod 611 can be quickly and widely adjusted in height relative to the first connecting arm 62, so that the wire feeding head 83 can be quickly positioned at the required height on the side of the soldering pen 9. Then, after being secured by the first connecting arm 62, the two ends of the second connecting arm 612 are rotated to achieve fine adjustment of the height and tilt of the wire feed head 83. In particular, the first rotating shaft 613 is sleeved on the second lifting rod 611. By rotating the first rotating shaft 613, multi-angle rotation can also be achieved, thereby ensuring that the wire outlet of the wire feed head 83 is fixed in the required position. When the wire feed head 83 and the soldering pen 9 are both adjusted and fixed in the required position, precise welding can be achieved when the product is welded by the automatic welding equipment. This solves the problem that the welding range is limited because the solder wire and soldering pen 9 of the existing welding equipment cannot be adjusted to the required position according to different products.

[0065] Example 8: Further improvements can be made based on any of the above embodiments, such as... Figure 7 The flipping mechanism 11 shown includes a rotary cylinder 111 and a clamp 112 mounted on the rotary cylinder 111, and the positioning mold base 12 is mounted on the clamp 112.

[0066] The positioning mold base 12 is mounted on the rotary cylinder 111 via the clamp 112, making it simpler and more convenient to flip the positioning mold base 12. It also has high flipping efficiency and high precision, and can be manually controlled with a pneumatic switch.

[0067] Example 9: like Figure 8 As shown, the positioning mold base 12 includes a first positioning rod 121 fixed on the clamp 112, two limiting rods 124 rotatably connected at one end to both ends of the first positioning rod 121, a base 128 disposed between the two limiting rods 124, a second positioning rod 125 rotatably connected at one end to one of the limiting rods 124, and detachable pressure plates 127 disposed on the upper and lower sides of the base 128. Two photovoltaic panels 200 are pressed and attached to the upper and lower sides of the base 128 by the pressure plates 127, and the tabs 100 are pressed and positioned by the first positioning rod 121 and / or the second positioning rod 125.

[0068] The first positioning rod 121 is fixedly mounted on the clamp 112. The inner side of the first positioning rod 121 has a structure for fixing the electrode tab 100. One end of each of the two limiting rods 124 is rotatably connected to both ends of the first positioning rod 121. The connecting end can rotate or be positioned at 90°. For example, the connecting end has a rotating shaft. By adjusting the tightness of the rotating shaft, the rotational friction can be adjusted. When it is necessary to install the electrode tab 100 on the first positioning rod 121 or disassemble the product, it can be removed from one side by opening the limiting rod 124. A second positioning rod 125 is rotatably connected to the other end of one of the limiting rods 124. When installing the outer electrode tab 100, the second positioning rod 125 is opened. After installation, the outer side of the electrode tab 100 can be pressed and positioned by rotating the second positioning rod 125. One of the limiting rods 124 is also equipped with a base 128, which provides planar support for the two photovoltaic panels 200 to be welded. After clamping by the pressure plate 127, the photovoltaic panels 200 to be welded are planarly clamped. Because the clamping area is large and uniform, it effectively prevents damage to the photovoltaic panels 200 due to localized clamping forces. During flipping, the pressure plate 127 also prevents localized stress on the photovoltaic panels 200 during the flipping process. One of the limiting rods 124 can also be fixedly connected, either directly to one end of the first positioning rod 121 or integrally formed.

[0069] A further improvement is made in that a limiting groove 129 is provided between the two limiting rods 124, and a pin 130 is provided in the limiting groove 129 of one of the limiting rods 124, and the base 128 is fixed in the limiting rod 124 by the pin 130.

[0070] The base 128 is positioned on both sides by limiting slots 129, which effectively ensures the relative position between the limiting rod 124 and the base 128, and at the same time prevents the base 128 from tilting due to pressure during welding. The base 128 is fixed in one of the limiting rods 124 by a pin 130, which ensures the stability of the base 128 after the other limiting rod 124 is opened, and prevents it from falling off.

[0071] A further improvement is made in that the limiting rod 124 is provided with a positioning groove 126, the two sides of the pressure block are provided with protrusions 123 that match the positioning groove 126, and the pressure plate 127 and / or the positioning groove 126 are provided with magnetic blocks 122.

[0072] The positioning groove 126 enables the pressure block to effectively engage with the protrusion 123 during installation, allowing for rapid positioning and clamping of the pressure block. Furthermore, the pressure plate 127 and the positioning groove 126 are connected by a magnetic block 122, effectively solving the problem of existing clamping structures requiring additional fixation via screws or clips, which leads to cumbersome product disassembly and assembly. This makes disassembly and assembly convenient, ensures more uniform pressure, and avoids the forced clamping problems present in other structures.

[0073] When feeding materials, such as Figure 2 As shown, a material feeding tray 13 is also provided on the operating table, through which spare materials can be temporarily stored.

[0074] Example 10: The following improvements were made based on Example 9: Figure 9 As shown, the bottom of the flipping mechanism 11 is also provided with a rotating mechanism 14, and at least two flipping mechanisms 11 with the positioning mold base 12 are provided on the rotating mechanism 14.

[0075] Because welding generates light, odors, and heat, and the efficiency of a single positioning mold 12 is relatively low, operators on the same side as the positioning mold 12 are easily affected by the welding process and cannot load materials during welding. Therefore, a rotating mechanism 14 is added to the bottom of the flipping mechanism 11. The flipping mechanism 11 is mounted on the worktable 15 via the rotating mechanism 14, allowing at least two flipping mechanisms 11 with positioning molds 12 to be installed on the rotating mechanism 14. Since the installation and disassembly of photovoltaic panels 200 are not as efficient as welding, the flipping mechanisms 11 on the rotating mechanism 14 are designed in two sets and symmetrically arranged. The rotating mechanism 14 can rotate and switch the relative positions of the two flipping components, so that at least one is located in the welding area and the other is located in the external loading area. After the control cabinet 16 is installed, the entire equipment, except for the external positioning mold 12, is protected by the control cabinet 16, ensuring safety and isolating the operator from the welding area. When disassembling and assembling materials, the operator will not be affected by the internal welding process.

[0076] During operation, the operator installs the product onto the external positioning mold base 12, and then rotates it via a rotating mechanism to move the positioning mold base 12, which contains the material to be welded, to the welding area for welding the upper surface. Simultaneously, the operator installs the material to be welded onto the outer positioning mold base 12. After one side of the material to be welded is completed, the positioning mold base 12 is rotated 180° using a flipping mechanism 11 to weld the other side. The outer material to be welded can also be assembled separately by rotation during installation. After both sides are welded, the rotating mechanism 14 rotates it again to... The welded product leaves the welding area, and the newly loaded product enters the welding area for welding. The welded product rotated to the loading area can be disassembled. Through the combination of the rotating mechanism 14 and the two flipping mechanisms 11 with positioning mold bases 12, the material to be welded can be automatically flipped during double-sided welding. At the same time, during the welding process, the operator can promptly remove the welded product and load the product to be welded, thus effectively solving the problem that existing welding equipment cannot easily achieve double-sided direct welding in one loading, effectively improving welding efficiency and production efficiency.

[0077] A further improvement is made to the rotating mechanism 14, which includes a rotating platform 141 mounted on the operating table, a servo motor 142 for controlling the rotation of the rotating platform 141, a mounting base 143 provided on the rotating platform 141, and a flipping mechanism 11 provided on the mounting base 143.

[0078] When the rotating mechanism 14 rotates the flipping mechanism 11, the servo motor 142 drives the rotating platform 141 to rotate at a fixed angle, thereby realizing the fixed angle rotation of the flipping mechanism 11 mounted on the mounting base 143. The structure is simple, all components can be directly purchased, the manufacturing cost is low, and the rotation angle control is convenient.

[0079] Among them, such as Figure 10 As shown, the rotating platform 141 includes a rotating base 145 and a turntable 144 mounted on the rotating base 145 and controlled to rotate by the servo motor 142. The rotating base 145 is provided with a position sensor 19, and the turntable 144 is provided with a positioning block 20. Mounting base 143 is fixed on turntable 144 and rotates via turntable 144. After installation, the initial position between rotating base 145 and turntable 144 is corrected by the cooperation of position sensor 19 and positioning block 20. After correction, a fixed angle rotation can be achieved by controlling servo motor 142. At the same time, the positioning block 20 can be corrected once after passing position sensor 19, thereby avoiding the problem of angle deviation between rotating base 145 and turntable 144 during operation.

[0080] Example 11: A method for welding photovoltaic panel tabs, comprising the photovoltaic panel tab welding machine, the method comprising: S1. First, the relative positions of the welding pen 9 and the wire feeder 83 are precisely fine-tuned to reach the position required for welding. Then, the system is started through the control cabinet 16 for calibration to ensure that the requirements of the welding point are met. S2. Installing the material to be welded, wherein the method for installing the material to be welded includes: A1. Open the limiting rod 124, install the tab 100 at one end onto the first positioning rod 121, and then reset the limiting rod 124 so that a U-shaped structure is formed between the two limiting rods 124 and the first positioning rod 121. A2. Place the first photovoltaic panel 200 on the base 128, then install the outer tab 100 on the outside of the base 128 and press it with the second positioning rod 125. Adjust the position of the photovoltaic panel 200 and the tab 100 so that one end of the two tabs 100 is located at the electrode node of the photovoltaic panel 200 respectively. A3. Place the pressure block on the photovoltaic panel 200. After magnetic adsorption, ensure that the pressure plate 127 presses the photovoltaic panel 200 tightly against the base 128. A4. The positioning mold base 12 is rotated 180° by the flipping mechanism 11 controlled by the manual switch, and then the second photovoltaic panel 200 is installed. A5. Place the pressure block on the photovoltaic panel 200. After magnetic adsorption, ensure that the pressure plate 127 presses the photovoltaic panel 200 tightly against the base 128. When the welding machine has only one flipping mechanism 11 with a positioning mold base 12, the subsequent operation procedure is as follows: S3. Start the welding program, control the heating of the soldering pen 9 through the temperature controller 4, and at the same time transport the solder wire to the welding area through the solder wire delivery mechanism 8. S4. The soldering iron tip 9 is moved to the contact temperature sensor 5 by the three-axis drive mechanism 10 to detect and calibrate the temperature of the soldering iron tip, ensuring the accuracy of the temperature. S5. The calibrated soldering pen 9 and solder wire are moved to the solder joint of the tab 100 by the three-axis drive mechanism 10 for soldering. During soldering, the solder joint near the fixture 112 is soldered first. During the soldering process, the slide cylinder 1 rises and supports the bottom of the outer end of the positioning mold base 12 in the soldering state to avoid unnecessary movement of the material to be soldered during the soldering process. After the soldering is completed, it retracts and resets, and then flips by the flipping mechanism 11. Then the outer end solder joint is soldered. S6. After the first photovoltaic panel 200 is soldered to the tab 100, the soldering pen 9 is moved to the air blower nozzle 2 by the three-axis drive mechanism 10 to blow air to clean the solder block and reduce the temperature of the soldering iron tip; then it is moved to the contact temperature sensor 5 to detect and calibrate the temperature of the soldering iron tip. During this process, the slide cylinder 1 is reset, and the positioning mold base 12 is flipped by the flipping mechanism 11. S7. The calibrated soldering pen 9 is moved to the solder joint of the tab 100 by the three-axis drive mechanism 10 and is re-welded according to the steps of S6 to complete the welding of the two photovoltaic panels 200 and the tab 100. The soldering pen 9 is then reset. S8. After the operator opens the limit rod 124, the welded material is removed and the next material is installed and welded.

[0081] When using this method for welding, operators only need to disassemble and assemble the materials, and the welding process can be completed automatically, thereby reducing the difficulty of welding construction, improving welding efficiency and quality, and ensuring that there will be no heat concentration during the welding process that could cause damage to the photovoltaic panel 200 or solder to adhere to the soldering pen 9, resulting in poor solder joints.

[0082] When two symmetrical tilting mechanisms 11 with positioning mold bases 12 are installed on the welding machine, the positioning mold base 12 in the welding area is in the welding process, while the other positioning mold base 12 is installed with the material to be welded through step S2. After S7 is completed, the rotating mechanism 14 is started by a manual switch to rotate the two positioning mold bases 12, thereby welding the installed material to be welded. The welded material is frequently disassembled and reassembled. Using two positioning mold bases 12 for welding can effectively utilize the welding time, thereby improving welding efficiency and safety. The disassembly and assembly parts and the start of the welding program are all controlled by manual switches, which can effectively avoid the problem of personnel injury caused by the program starting before the installation is completed or before the operator has released their hands during automatic operation.

[0083] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A welding machine for precise positioning welding of photovoltaic panels and tabs, characterized in that: The system includes a workbench (15), an X-axis linear module (101) mounted on the workbench (15), a Y-axis linear module (102) slidably mounted on the X-axis linear module (101), and a Z-axis linear module (103) slidably mounted on the Y-axis linear module (102), a temperature controller (4) for controlling the soldering temperature, a control cabinet (16) for setting equipment parameters and controlling the arrangement of components, a soldering pen (9) and a solder wire conveying mechanism (8) that move and solder through a three-axis drive mechanism, and a positioning mold base (12) for installing and fixing the material to be soldered. The soldering pen (9) and the solder wire conveying mechanism (8) are mounted on the Z-axis linear module (103). The workbench (15) is also provided with a flipping mechanism (11) for flipping the positioning mold base (12) and a contact temperature sensor (5) for measuring the temperature of the soldering tip of the soldering pen (9) after contact.

2. The welding machine for precise positioning and welding of photovoltaic panels and tabs according to claim 1, characterized in that: The workbench (15) is also equipped with an air blower nozzle (2), and the solder block on the solder pen (9) is blown off by the air blower nozzle (2).

3. A welding machine for precise positioning and welding of photovoltaic panels and tabs according to claim 2, characterized in that: The workbench (15) is provided with a solder block storage box (3). On one side of the solder block storage box (3) is a blow adjustment mechanism (17) for fixing the blow nozzle cleaner (2). The blowing angle of the blow nozzle cleaner (2) is adjusted and fixed by the blow adjustment mechanism (17).

4. A welding machine for precise positioning and welding of photovoltaic panels and tabs according to claim 3, characterized in that: The air blowing adjustment mechanism (17) includes a first connecting seat (171) on one side of the tin block storage box (3), a first lifting rod (172) on the first connecting seat (171), a first connecting block (173) on the first lifting rod (172), and a second connecting block (174) rotatably connected at one end to the first connecting block (173). The air blowing nozzle (2) is located on the second connecting block (174). The air blowing nozzle (2) is adjusted for lifting and rotation by the first lifting rod (172) and for tilt by the second connecting block (174).

5. A welding machine for precise positioning welding of photovoltaic panels and tabs according to claim 1, characterized in that: The workbench (15) is also equipped with a slide cylinder (1) for welding support of the bottom of the outer end of the positioning mold base (12) in the welding state. The slide cylinder (1) pneumatically supports the material to be welded above, avoiding unnecessary movement of the material during welding.

6. A welding machine for precise positioning welding of photovoltaic panels and tabs according to claim 1, characterized in that: The solder wire conveying mechanism (8) includes a wire roll fixing seat (81), an automatic wire breaker (82) for pre-treating the solder wire during welding, and a wire feeder (83) for accurately and stably conveying the treated solder wire. The solder wire drawn out from the solder roll on the fixing seat is pre-treated by the automatic wire breaker (82) and then conveyed to the wire feeder (83) for accurate feeding into the welding area.

7. A welding machine for precise positioning and welding of photovoltaic panels and tabs according to claim 1, characterized in that: The bottom of the flipping mechanism (11) is also provided with a rotating mechanism (14), and at least two flipping mechanisms (11) with the positioning mold base (12) are provided on the rotating mechanism (14).

8. A welding machine for precise positioning welding of photovoltaic panels and tabs according to claim 7, characterized in that: The positioning mold base (12) includes a first positioning rod (121) fixed on a clamp (112), two limiting rods (124) with one end rotatably connected to both ends of the first positioning rod (121), a base (128) disposed between the two limiting rods (124), a second positioning rod (125) with one end rotatably connected to one of the limiting rods (124), and detachable pressure plates (127) disposed on the upper and lower sides of the base (128). Two photovoltaic panels are pressed and attached to the upper and lower sides of the base (128) by the pressure plates (127). The tabs in the material to be welded are pressed and positioned by the first positioning rod (121) and / or the second positioning rod (125).

9. A welding machine for precise positioning welding of photovoltaic panels and tabs according to claim 6, characterized in that: The Z-axis linear module (103) is provided with a solder pen adjustment mechanism (7) on its slide table. The wire feed head (83) is located on the solder pen adjustment mechanism (7). The position of the solder pen (9) and the solder wire relative to the Z-axis linear module (103) can be finely adjusted by the solder pen adjustment mechanism (7).

10. A welding machine for precise positioning welding of photovoltaic panels and tabs according to claim 9, characterized in that: The welding pen adjustment mechanism (7) is also provided on one side with a welding wire adjustment bracket (6) for fine adjustment of the wire feed head (83).

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