Axial diode pin welding device

Abstract

The invention discloses an axial diode pin welding device, and belongs to the technical field of axial diode product.The axial diode pin welding device comprises a welding platform, through grooves are formed in the two sides of the surface of the top end of the welding platform in a penetrating mode, and a spot welding machine is installed at the top of a multi-point surrounding type welding assembly; the spot welding machine is provided with three welding heads through wires and used for welding diode pins, polar tube fixing, moving and rotating assemblies are installed on the two sides of the multi-point surrounding type welding assembly and used for evenly distributing welding heat to contact areas of the pins, and the welding defect caused by uneven heating in the welding process is avoided. By adopting the polar tube fixing, moving and rotating assembly and the multi-point surrounding type welding assembly, the clamping force, the alignment precision, the welding angle and the welding flux coverage range of every two diode pins can be completely consistent, and quality fluctuation caused by manual operation habit difference and fatigue hand shaking is avoided.

Description

Technical Field

[0001] This invention belongs to the field of axial diode manufacturing technology, and specifically relates to an axial diode pin welding device. Background Technology

[0002] An axial diode is an electronic component characterized by its pins arranged axially. These diodes are commonly used in circuits as rectifiers, switching elements, and protection components. In some circuit designs, two axial diodes may need to be connected in parallel or series. When two diodes are connected in parallel, they can share the load, improving the circuit's voltage withstand and current handling capabilities. When two diodes are connected in series, they can be used to increase the circuit's operating voltage or limit current flow, commonly used in high-voltage protection and current-limiting circuits. In applications requiring high mechanical strength and interference immunity, soldering multiple diode pins not only ensures electrical connection but also provides structural support.

[0003] Diode leads are typically made of metal wires, which are prone to softening during high-temperature soldering. Currently, when soldering the leads of axial diodes, it is often necessary to manually align the two axial diodes before spot welding. After spot welding, the solder solidifies from a liquid state, generating a contraction force. Due to their weak stress resistance, the leads cannot resist this contraction force. If there is a slight deviation when aligning the two leads, the contraction force will directly pull the leads, causing the leads to bend to one side. This not only affects the subsequent assembly of the diode (making it impossible to insert into the PCB hole), but also creates hidden stress inside the solder joint. Over long-term use, the solder joint is prone to cracking due to vibration and temperature cycling. Furthermore, because the leads are relatively soft, the solder joint may not be strong during spot welding. The leads are prone to deformation during heating, resulting in insufficient strength of the solder joint, and may even lead to problems such as desoldering or loosening. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an axial diode pin welding device.

[0005] The technical solution adopted to solve the above-mentioned technical problems is: an axial diode pin welding device, including a welding platform, and through slots are opened on both sides of the top surface of the welding platform. A multi-point surrounding welding assembly is fixedly connected to the top surface of the welding platform between two through slots to avoid local overheating of the pins, reduce the risk of bending and deformation of the pins due to softening, and improve the welding success rate. A spot welding machine is installed on the top of the multi-point surrounding welding assembly. The spot welding machine is equipped with three welding heads through wires for welding the diode pins. A diode fixing, moving and rotating assembly is installed on both sides of the multi-point surrounding welding assembly to evenly distribute the welding heat in the contact area of ​​the pins and avoid welding defects caused by uneven heating during the welding process.

[0006] The above technical solutions provide higher welding precision, quality, and production efficiency. At the same time, the application of automation systems effectively reduces labor costs, reduces defects in the production process, and improves consistency and repeatability.

[0007] Furthermore, the multi-point surrounding welding assembly includes a welding bracket fixedly connected to the welding platform, with the top and bottom of the welding bracket being open. A spot welding machine is installed at the top opening of the welding bracket. Three sliding grooves are formed through both sides of the welding bracket, and two mirror-image sliding grooves are formed through the welding bracket on either side of the third sliding groove. The second sliding groove is longer than the first sliding groove. The first and second sliding grooves are arranged in a fan-shaped structure. A first slider, a second slider, and a third slider are respectively installed in the first, second, and third sliding grooves. The first, second, and third sliders are slidably connected to the welding bracket and engage with it.

[0008] The above technical solution enables the three sliders to precisely control the movement path of the welding head, ensuring accurate alignment between the welding head and the diode pin. This avoids possible offsets and asymmetries during manual operation, thereby improving welding accuracy.

[0009] Furthermore, the first slider is rotatably connected to a first connecting rod and a second connecting rod on the side away from the inside of the welding bracket. The end of the first connecting rod away from the first slider is rotatably connected to the second slider. At the same time, the ends of the two second connecting rods away from the first slider are rotatably connected to the third slider. The first and second connecting rods are arranged in an M-shaped structure. The ends of the two second connecting rods away from the first slider are rotatably connected to each other. Hydraulic rods are installed on both sides of the welding bracket. The telescopic ends of the hydraulic rods are fixedly connected to connecting pieces. At the same time, the connecting pieces are rotatably connected to the connection points of the two second connecting rods.

[0010] The above technical solution can heat the pins and solder joints more evenly. Even heating helps to form stronger and more stable solder joints, reducing the problems of poor solder joints or poor soldering quality that may be caused by uneven heating.

[0011] Furthermore, the bottom of the welding bracket has a semi-circular through hole, and the extension lines of the first, second, and third sliding grooves coincide with the center of the through hole. At the same time, the welding bracket is equipped with three support rods, which are installed and fixed to the welding head, and the welding head is located at the center line of the support rods. The three support rods are also fixedly connected to two second sliders and one third slider, respectively.

[0012] Through the above technical solution, the rotation and opposing movement of the two axial diodes help to distribute heat and apply force more evenly, avoid overheating or uneven temperature on one side, and reduce the possibility of cold soldering or poor soldering. At the same time, the synchronous operation of the three welding heads can ensure that the heat of the welding point is evenly distributed, thereby improving the quality and stability of the welding.

[0013] Furthermore, the electrode fixing, moving, and rotating assembly includes two T-shaped frames fixedly connected to the welding platform. The top of the T-shaped frames is a tubular structure, and the inside of the tubular top of the T-shaped frames is hollow. A rectangular groove is opened through the bottom of the tubular top of the T-shaped frames, and two limiting strips are welded inside the tubular top of the T-shaped frames. A sliding rod is slidably connected inside the tubular top of the T-shaped frames. Limiting grooves are opened on both sides of the sliding rod, and the limiting strips are located in the limiting grooves. The sliding rod is slidably connected to the T-shaped frames and the limiting strips. The limiting strips limit the sliding rod, and several equally spaced toothed grooves are opened at the bottom of the limiting strips.

[0014] The above technical solutions have automated the welding process, reduced manual intervention, alleviated the burden on operators, and further improved production efficiency and the repeatability of operations.

[0015] Furthermore, a gear is provided at the bottom of the slide rod, and the gear is located inside the T-shaped frame. The gear is rotatably connected to the T-shaped frame, and the teeth of the gear are located in the tooth groove. The gear meshes with the slide rod through the tooth groove for transmission. At the same time, a servo motor is installed on one side of the bottom of the T-shaped frame. The output end of the servo motor is rotatably connected to the T-shaped frame, and the through end of the servo motor is fixedly connected to the gear. A second synchronous pulley is rotatably connected to one end of the T-shaped frame, and the second synchronous pulley is located on the same straight line as the through groove.

[0016] Through the above technical solution, the pins can be evenly stressed during the welding process, avoiding excessive pressure or heating on one side, thereby effectively reducing the risk of pin deformation. In particular, after the pin contact point is rotated, the probability of pin deformation is reduced, ensuring the stability of the welding point.

[0017] Furthermore, the second synchronous pulley has a hollow structure in the middle, and several protrusions are welded to the middle of the second synchronous pulley in a symmetrical arrangement around the circumference. One end of the slide rod is rotatably connected to a spline rod, and the spline rod is slidably connected to the second synchronous pulley through it. At the same time, the protrusions are located in the grooves of the spline rod, and the protrusions limit the spline rod. A fixing frame with a tubular structure is installed at the end of the spline rod away from the slide rod, and the center of the tubular fixing frame coincides with the origin of the through hole.

[0018] The above technical solution enables the rapid and accurate docking and positioning of pins, freeing the welding process from human intervention and improving the overall welding speed. Furthermore, the synchronous adjustment of the two pins allows for the processing of multiple welding points in a short period of time.

[0019] Furthermore, the fixed frame has a plurality of circumferentially symmetrically distributed limiting rods slidably connected to the end away from the spline rod, and a rubber plate is fixedly connected to one end of each limiting rod. An axial diode is engaged between the plurality of rubber plates. A spring rod is provided on one side of each limiting rod, and one end of the spring rod is fixedly connected to the rubber plate. The other end of the spring rod is slidably connected to the fixed frame. The end of the spring rod away from the rubber plate is fixedly connected to the fixed frame.

[0020] The above technical solution ensures that the positioning and angle of the pins are consistent in each welding process, thereby ensuring that the welding quality of each batch of products is consistent and reducing welding defects caused by operational differences.

[0021] Furthermore, the bottom of the welding platform is rotatably connected to two No. 1 synchronous pulleys, and a connecting rod is provided between the two No. 1 synchronous pulleys. The connecting rod is rotatably connected to the welding platform through it, and the end of the connecting rod through it is fixedly connected to the No. 1 synchronous pulley. A rotary motor is installed on one side of the bottom of the welding platform. The output end of the rotary motor is rotatably connected to the welding platform through it, and the end of the rotary motor through it is fixedly connected to one of the No. 1 synchronous pulleys. A synchronous belt is connected between the No. 1 synchronous pulley and the No. 2 synchronous pulley, and the synchronous belt is located in the through groove.

[0022] The above technical solution avoids stress concentration caused by repeated bending of the flexible tube pins, making the connection between the flexible tube pins and the internal chip leads more stable.

[0023] The beneficial effects of this invention are as follows: This invention employs a multi-point surrounding welding assembly with hydraulic rods that drive the connecting parts to move vertically, thereby causing the third slider to slide within the third groove. As the third slider moves, the two second connecting rods on it rotate relative to each other around their connection points with the third slider, pulling the first sliders on both sides to slide within the first groove. Simultaneously, as the first slider slides, the first connecting rod rotates around its connection point with the second connecting rod, pulling the second slider to slide within the second groove. This causes the three support rods and their connected welding heads to move towards the center of the through hole. Through the multi-link "synchronous approach without deviation," the joint is heated synchronously from both sides and above, ensuring uniform melting and filling of the gaps by the solder (such as tin-lead solder). This avoids the cold soldering (insufficient solder flow) caused by the "one-sided melting first, one-sided melting later" of manual soldering, reducing the frequency of fluctuations in solder joint resistance. (2) This invention uses a fixed moving rotating assembly of diodes. The servo motor drives the gear to rotate. Under the action of the tooth groove, the slide rod slides in the tube at the top of the T-shaped frame. With the cooperation of the limit strip, the slide rod drives the spline rod to slide in the second synchronous wheel, thereby causing the two axial diodes to move towards each other and align the pins of the two axial diodes. After the pins of the two axial diodes are aligned, the rotating motor at the bottom of the welding platform can make the two first synchronous wheels rotate synchronously, thereby making the two synchronous belts drive synchronously, causing the two second synchronous wheels to rotate simultaneously, thereby causing the fixed frame and axial diodes connected to one end of the spline rod to rotate synchronously, so that the diodes rotate synchronously during welding. With the synchronous approach of the three welding heads, the 360-degree full-circumference welding of the butt joint is achieved (manual spot welding can only perform local welding). This method ensures that the solder evenly coats the pin joints, avoiding "local solder buildup and local missing solder". At the same time, the rotation disperses the heat input, preventing the flexible tube pins from being crushed due to a sudden drop in strength caused by local high temperature (such as a sudden increase in temperature at a single point), and also protecting the internal chip of the diode from damage due to local overheating. Attached Figure Description

[0024] Figure 1 This is a first-view structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the second perspective structure of the present invention; Figure 3 This is a schematic diagram of the third-view structure of the present invention; Figure 4 This is a schematic diagram of the fourth perspective structure of the present invention; Figure 5 yes Figure 1 A magnified structural diagram at point A; Figure 6 yes Figure 2 A magnified structural diagram at point B; Figure 7 yes Figure 3 A magnified structural diagram at point C; Figure 8 This is a schematic diagram of the electrode tube fixed-moving-rotating assembly structure of the present invention; Figure 9 This is a schematic diagram of the connection between the gear and the slide bar in this invention; Figure 10 This is a schematic diagram of the connection between the spline rod and the slide rod of the present invention; Figure 11 This is a schematic diagram of the No. 2 synchronous pulley structure of the present invention.

[0025] Reference numerals: 11. Welding platform; 12. Spot welding machine; 13. Wire; 14. Welding head; 15. Through slot; 16. Axial diode; 2. Multi-point surrounding welding assembly; 21. Welding bracket; 22. No. 1 slide; 23. No. 2 slide; 24. No. 3 slide; 25. No. 1 slider; 26. No. 2 slider; 27. No. 3 slider; 28. Hydraulic rod; 29. ​​Connector; 210. No. 1 connecting rod; 211. No. 2 connecting rod; 212. Through hole; 213. Support 3. Support rod; 4. Electrode fixing, moving and rotating assembly; 5. Rotary motor; 6. Synchronous pulley No. 1; 7. Synchronous belt; 8. Connecting rod; 9. Synchronous pulley No. 2; 10. T-shaped frame; 11. Spline rod; 12. Fixing frame; 13. Spring rod; 14. Limiting rod; 15. Rubber plate; 26. Gear; 37. Servo motor; 48. Slide rod; 59. Limiting strip; 60. Rectangular groove; 11. Protrusion; 12. Limiting groove; 33. Gear groove. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] like Figures 1-6 This embodiment of an axial diode pin welding device includes a welding platform 11, with through slots 15 extending through both sides of the top surface of the welding platform 11. A multi-point surrounding welding assembly 2 is fixedly connected to the top surface of the welding platform 11 between two through slots 15. This assembly is used to prevent local overheating of the pins, reduce the risk of bending and deformation of the pins due to softening, and improve the welding success rate. The multi-point surrounding welding assembly 2 includes a welding bracket 21 fixedly connected to the welding platform 11. The welding bracket 21 is open at the top and bottom, providing higher welding accuracy, quality, and production efficiency. At the same time, the application of the automation system effectively reduces labor costs, reduces defects in the production process, and improves consistency and repeatability. Meanwhile, the spot welding machine 12 is installed at the top opening of the welding bracket 21. The welding bracket 21 has three sliding grooves 24 running through its sides. The welding bracket 21 located on both sides of the three sliding grooves 24 has two sliding grooves 22 and 23 running through it in a mirror image. The bottom of the welding bracket 21 has a semi-circular through hole 212 running through it. The extension lines of the first sliding groove 22, the second sliding groove 23 and the third sliding groove 24 coincide with the center of the through hole 212. This allows for quick and accurate docking and positioning of the pins, making the welding process independent of human operation and improving the overall welding speed. In addition, the synchronous adjustment of the two pins can complete the processing of multiple welding points in a short time. The welding bracket 21 also has three support rods 213 inside.

[0028] like Figures 2-6 As shown, three support rods 213 are installed and fixed to the welding head 14, with the welding head 14 located at the center line of the support rods 213. Simultaneously, the three support rods 213 are fixedly connected to two second sliders 26 and one third slider 27, respectively. The second slide groove 23 is longer than the first slide groove 22. The first slide groove 22 and the second slide groove 23 are arranged in a fan-shaped structure. A first slider 25, a second slider 26, and a third slider 27 are respectively installed within the first slide groove 22, the second slide groove 23, and the third slide groove 24. Block 27, slider 25, is rotatably connected to connecting rod 210 and connecting rod 211 on the side away from the inside of welding bracket 21. The end of connecting rod 210 away from slider 25 is rotatably connected to slider 26, and the ends of connecting rods 211 away from slider 25 are rotatably connected to slider 27. This allows the three sliders to precisely control the movement path of welding head 14, ensuring accurate alignment of the welding head 14 with the diode pin. This eliminates the need for manual operation. To mitigate potential offsets and asymmetries during welding, and thus improve welding precision, the first connecting rod 210 and the second connecting rod 211 are arranged in an M-shape. The ends of the two second connecting rods 211 away from the first slider 25 are rotatably connected to each other. Hydraulic rods 28 are installed on both sides of the welding bracket 21, and connectors 29 are fixedly connected to the telescopic ends of the hydraulic rods 28. Connectors 29 are rotatably connected to the two second connecting rods 211. Meanwhile, the first slider 25, the second slider 26, and the third slider 27 are slidably connected to the welding bracket 21. The first slider 25, the second slider 26, and the third slider 27 are engaged with the welding bracket 21. A spot welding machine 12 is installed on the top of the multi-point surrounding welding assembly 2, which can heat the pins and welding points more evenly. Even heating helps to form stronger and more stable welding points, reducing the possibility of poor welding or poor welding quality caused by uneven heating. The spot welding machine 12 is equipped with three welding heads 14 through wires 13 for welding diode pins.

[0029] like Figures 1-11As shown, the multi-point surrounding welding assembly 2 is equipped with a diode fixing, moving, and rotating assembly 3 on both sides to evenly distribute welding heat over the contact area of ​​the pins, avoiding welding defects caused by uneven heating during the welding process. The diode fixing, moving, and rotating assembly 3 includes two T-shaped frames 36 fixedly connected to the welding platform 11, and the top of the T-shaped frames 36 is set in a tubular structure, ensuring that the positioning and angle of the pins are consistent in each welding process, thereby ensuring consistency in welding quality for each batch of products and reducing welding defects caused by operational differences. The rotation and counter-movement of the two axial diodes 16 help to distribute heat and apply force more evenly, avoiding overheating or uneven temperature on one side, and reducing the possibility of cold welding or incomplete welding. At the same time, the three welding heads 14 work synchronously. This design ensures uniform heat distribution at the welding point, thereby improving welding quality and stability. The top tube of the T-shaped frame 36 has a hollow structure, with a rectangular groove 316 extending through the bottom. Two limiting strips 315 are welded inside the top tube of the T-shaped frame 36, and a sliding rod 314 is slidably connected inside. A gear 312 is located at the bottom of the sliding rod 314 and is rotatably connected to the T-shaped frame 36. This ensures even force distribution on the tube feet during welding, preventing excessive pressure or heating on one side and effectively reducing the risk of tube foot deformation. The probability of deformation is further reduced after rotation at the tube foot contact point, ensuring the stability of the welding point.

[0030] like Figures 2-11As shown, the teeth of gear 312 are located within the tooth groove 319, and gear 312 meshes with slide bar 314 through tooth groove 319 for transmission. Meanwhile, a servo motor 313 is installed on one side of the bottom of T-shaped frame 36. The output end of servo motor 313 is rotatably connected to T-shaped frame 36, and the through end of servo motor 313 is fixedly connected to gear 312. A second synchronous pulley 35 is rotatably connected to one end of T-shaped frame 36. Two first synchronous pulleys 32 are rotatably connected to the bottom of welding platform 11, and a connecting rod 34 is provided between the two first synchronous pulleys 32. The connecting rod 34 is rotatably connected to welding platform 11, and the through end of connecting rod 34 is fixedly connected to the first synchronous pulley 32. A rotary motor 31 is installed on one side of the bottom of welding platform 11, and the output end of rotary motor 31 is rotatably connected to welding platform 11. The through end is fixedly connected to one of the first synchronous pulleys 32, realizing the automation of the welding process, reducing manual intervention, alleviating the burden on operators, and further improving production efficiency and repeatability of operation. The first synchronous pulley 32 and the second synchronous pulley 35 are connected by a synchronous belt 33, which is located in the through groove 15. The second synchronous pulley 35 has a hollow structure in the middle, and several protrusions 317 are welded in the middle of the second synchronous pulley 35 in a circumferentially symmetrical arrangement. One end of the slide rod 314 is rotatably connected to a spline rod 37, and the spline rod 37 is slidably connected to the second synchronous pulley 35. At the same time, the protrusions 317 are located in the groove of the spline rod 37, and the protrusions 317 limit the spline rod 37. The end of the spline rod 37 away from the slide rod 314 is equipped with a fixed bracket 38 with a tubular structure.

[0031] like Figures 3-11 As shown, a plurality of symmetrically arranged limiting rods 310 are slidably connected through the end of the fixed frame 38 away from the spline rod 37, and one end of the limiting rod 310 is fixedly connected to a rubber plate 311. An axial diode 16 is engaged between the rubber plates 311. A spring rod 39 is provided on one side of the limiting rod 310, and one end of the spring rod 39 is fixedly connected to the rubber plate 311, while the other end of the spring rod 39 is slidably connected through the fixed frame 38. The end of the spring inside the spring rod 39 away from the rubber plate 311 is fixedly connected to the fixed frame 38. The center of the fixed frame 38 coincides with the origin of the through hole 212, and the second synchronous wheel 35 and the through groove 15 are on the same straight line. Limiting grooves 318 are opened on both sides of the slide rod 314, and the limiting strip 315 is located in the limiting groove 318. At the same time, the slide rod 314 is slidably connected with the T-shaped frame 36 and the limiting strip 315. The limiting strip 315 limits the slide rod 314, and the bottom of the limiting strip 315 is provided with several toothed grooves 319 arranged at equal intervals, which avoids stress concentration caused by repeated bending of the flexible hose foot by manual labor, and the connection between the flexible hose foot and the internal chip lead is more stable.

[0032] The working principle of this embodiment is as follows: Before welding, the connection ends of the two fixing brackets 38 and the spline rod 37 are located outside the through hole 212. The two axial diodes 16 are respectively placed between the rubber plates 311 inside the two fixing brackets 38. The spring rod 39 and the limiting rod 310 slide outward from the fixing brackets 38 to engage and limit the axial diodes 16.

[0033] Then, the servo motor 313 drives the gear 312 to rotate. Under the action of the tooth groove 319, the slide rod 314 slides in the tube at the top of the T-shaped frame 36. With the cooperation of the limit bar 315, the slide rod 314 drives the spline rod 37 to slide in the second synchronous wheel 35, thereby causing the two axial diodes 16 to move towards each other and align the pins of the two axial diodes 16.

[0034] After the pins of the two axial diodes 16 are aligned, the rotary motor 31 at the bottom of the welding platform 11 drives one of the first synchronous pulleys 32 to rotate. Under the action of the connecting rod 34, the two first synchronous pulleys 32 can rotate synchronously, which in turn causes the two synchronous belts 33 to drive synchronously, causing the two second synchronous pulleys 35 to rotate simultaneously. Under the limiting action of the protrusion 317 in the middle of the second synchronous pulley 35, the spline rod 37 rotates, which in turn causes the fixed frame 38 connected to one end of the spline rod 37 and the axial diodes 16 and other components to rotate synchronously.

[0035] Then, the hydraulic rods 28 on both sides of the welding bracket 21 operate, pushing the connector 29 to move vertically, thereby causing the third slider 27 to slide in the third groove 24. When the third slider 27 moves, the two second connecting rods 211 on the third slider 27 rotate relative to each other with the connection point with the third slider 27 as the origin, thereby pulling the first slider 25 on both sides to slide in the first groove 22. When the first slider 25 slides, the first connecting rod 210 rotates towards the second connecting rod 211 with the connection point with the second connecting rod 211 as the origin, thereby pulling the second slider 26 to slide in the second groove 23, causing the three support rods 213 and their connected welding heads 14 to move towards the center of the through hole 212.

[0036] Then the spot welding machine 12 runs, and under the action of the wire 13, the welding head 14 welds the pins of the two aligned rotating axial diodes 16. After the welding is completed, the spot welding machine 12 stops running, the hydraulic rod 28 and the servo motor 313 run in opposite directions, causing the three welding heads 14 to move in the opposite direction to the through hole 212, and the two axial diodes 16 that have been welded can be taken out.

[0037] By repeating the above steps, the pins of the axial diode 16 can be continuously soldered.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. An axial diode pin welding device, comprising a welding platform (11), wherein through slots (15) are provided on both sides of the top surface of the welding platform (11), characterized in that: The welding platform (11) located between the two through slots (15) has a multi-point surrounding welding assembly (2) fixedly connected to its top surface. This assembly is used to avoid local overheating of the pins, reduce the risk of bending and deformation of the pins due to softening, and improve the welding success rate. A spot welding machine (12) is installed on the top of the multi-point surrounding welding assembly (2). The spot welding machine (12) is equipped with three welding heads (14) through wires (13) for welding the diode pins. The multi-point surrounding welding assembly (2) has a diode fixed moving rotating assembly (3) installed on both sides to distribute the welding heat evenly in the contact area of ​​the pins and avoid welding defects caused by uneven heating during the welding process.

2. The axial diode pin welding device according to claim 1, characterized in that, The multi-point surrounding welding assembly (2) includes a welding bracket (21) fixedly connected to the welding platform (11), with the top and bottom of the welding bracket (21) being open. A spot welding machine (12) is installed at the top opening of the welding bracket (21). Three sliding grooves (24) are provided through both sides of the welding bracket (21), and two parallel sliding grooves (23) are provided through the welding brackets (21) on either side of the three sliding grooves (24), mirror-image arranged. The length of the second sliding groove (23) is greater than that of the first sliding groove. The slide (22) and the slide (23) are arranged in a fan-shaped structure. The slide (22), the slide (23) and the slide (24) are respectively provided with a slider (25), a slider (26) and a slider (27). The slider (25), the slider (26) and the slider (27) are slidably connected to the welding bracket (21). The slider (25), the slider (26) and the slider (27) are engaged with the welding bracket (21).

3. The axial diode pin welding device according to claim 2, characterized in that, The first slider (25) is rotatably connected to the first connecting rod (210) and the second connecting rod (211) on the side away from the inside of the welding bracket (21). The end of the first connecting rod (210) away from the first slider (25) is rotatably connected to the second slider (26). At the same time, the ends of the two second connecting rods (211) away from the first slider (25) are rotatably connected to the third slider (27). The first connecting rod (210) and the second connecting rod (211) are arranged in an M-shaped structure. The ends of the two second connecting rods (211) away from the first slider (25) are rotatably connected to each other. Hydraulic rods (28) are installed on both sides of the welding bracket (21). The extension end of the hydraulic rod (28) is fixedly connected to a connector (29). At the same time, the connector (29) is rotatably connected to the connection point of the two second connecting rods (211).

4. The axial diode pin welding device according to claim 2, characterized in that, The bottom of the welding bracket (21) is provided with a semi-circular through hole (212), and the extension lines of the first slide groove (22), the second slide groove (23) and the third slide groove (24) coincide with the center of the through hole (212). At the same time, the welding bracket (21) is provided with three support rods (213). The three support rods (213) are installed and fixed with the welding head (14), and the welding head (14) is located at the center line of the support rods (213). The three support rods (213) are fixedly connected to two second sliders (26) and one third slider (27) respectively.

5. The axial diode pin welding device according to claim 4, characterized in that, The electrode fixed moving rotating assembly (3) includes two T-shaped frames (36) fixedly connected to the welding platform (11). The top of the T-shaped frame (36) is set as a tube structure, and the inside of the tube at the top of the T-shaped frame (36) is set as a hollow structure. A rectangular groove (316) is opened through the bottom of the tube at the top of the T-shaped frame (36). Two limiting strips (315) are welded inside the tube at the top of the T-shaped frame (36). A sliding rod (314) is slidably connected inside the tube at the top of the T-shaped frame (36). Limiting grooves (318) are opened on both sides of the sliding rod (314), and the limiting strips (315) are located in the limiting grooves (318). The sliding rod (314) is slidably connected to the T-shaped frame (36) and the limiting strips (315). The limiting strips (315) limit the sliding rod (314), and several toothed grooves (319) are opened at equal intervals at the bottom of the limiting strips (315).

6. The axial diode pin welding device according to claim 5, characterized in that, The bottom of the slide bar (314) is provided with a gear (312), and the gear (312) is located inside the T-shaped frame (36). At the same time, the gear (312) is rotatably connected to the T-shaped frame (36). The teeth of the gear (312) are located in the tooth groove (319), and the gear (312) meshes with the slide bar (314) through the tooth groove (319). Meanwhile, a servo motor (313) is installed on one side of the bottom of the T-shaped frame (36). The output end of the servo motor (313) is rotatably connected to the T-shaped frame (36), and the through end of the servo motor (313) is fixedly connected to the gear (312). One end of the T-shaped frame (36) is rotatably connected to a second synchronous wheel (35), and the second synchronous wheel (35) and the through groove (15) are located on the same straight line.

7. An axial diode pin welding device according to claim 6, characterized in that, The second synchronous pulley (35) has a hollow structure in the middle, and several protrusions (317) are welded in the middle of the second synchronous pulley (35) in a circumferentially symmetrical arrangement. One end of the slide rod (314) is rotatably connected to a spline rod (37), and the spline rod (37) is slidably connected to the second synchronous pulley (35). At the same time, the protrusions (317) are located in the groove of the spline rod (37), and the protrusions (317) limit the spline rod (37). A fixing frame (38) with a tubular structure is installed at the end of the spline rod (37) away from the slide rod (314), and the center of the tubular fixing frame (38) coincides with the center of the through hole (212).

8. An axial diode pin welding device according to claim 7, characterized in that, The fixed frame (38) has a plurality of circumferentially symmetrically distributed limiting rods (310) that are slidably connected through one end away from the spline rod (37). One end of the limiting rod (310) is fixedly connected to a rubber plate (311), and an axial diode (16) is engaged between the plurality of rubber plates (311). A spring rod (39) is provided on one side of the limiting rod (310), and one end of the spring rod (39) is fixedly connected to the rubber plate (311). At the same time, the other end of the spring rod (39) is slidably connected through the fixed frame (38). The end of the spring in the spring rod (39) away from the rubber plate (311) is fixedly connected to the fixed frame (38).

9. An axial diode pin welding device according to claim 6, characterized in that, The bottom of the welding platform (11) is rotatably connected to two No. 1 synchronous pulleys (32), and a connecting rod (34) is provided between the two No. 1 synchronous pulleys (32). The connecting rod (34) is rotatably connected to the welding platform (11) through it. The end of the connecting rod (34) is fixedly connected to the No. 1 synchronous pulley (32). A rotary motor (31) is installed on one side of the bottom of the welding platform (11). The output end of the rotary motor (31) is rotatably connected to the welding platform (11) through it. The end of the rotary motor (31) is fixedly connected to one of the No. 1 synchronous pulleys (32). A synchronous belt (33) is connected between the No. 1 synchronous pulley (32) and the No. 2 synchronous pulley (35). The synchronous belt (33) is located in the through groove (15).

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