A circuit board welding device for leakage protector production

Abstract

The present application relates to the technical field of circuit board welding, and discloses a circuit board welding device for leakage protector production, which comprises a welding box, a plurality of air holes opened on the welding box, a secondary clamping and air extraction mechanism symmetrically arranged on both sides of the welding box, and a welding mechanism for welding the circuit board. The welding mechanism is located in the welding box and connected with the welding box. The secondary clamping and air extraction mechanism comprises a secondary clamping block, an air extraction assembly, an air guide assembly, a secondary clamping groove opened on the secondary clamping block, a gas storage chamber opened in the secondary clamping block, an exhaust hole opened on the gas storage chamber, and a driving assembly for driving the secondary clamping block to reciprocate along the length direction of the welding box. The secondary clamping block is in sliding connection with the welding box. The air extraction assembly is in communication with the gas storage chamber. The problem that the flow effect of gas is reduced due to the blockage of the filter bin when the existing clamping device is used is solved.

Description

Technical Field

[0001] This invention relates to the field of circuit board welding technology, and more specifically to a circuit board welding device for the production of leakage current protection devices. Background Technology

[0002] In the process of circuit board repair or manufacturing, it is necessary to solder the electronic components inside the circuit board. During soldering, it is essential to ensure the stability of the circuit board during the soldering process to prevent movement or tilting, thereby improving the soldering quality. Therefore, a circuit board soldering clamping device is needed. Existing circuit board soldering clamping devices, when performing soldering on both sides of the circuit board, mostly require clamping one side for soldering, releasing the circuit board, and then clamping and soldering the other side. Re-clamping requires repositioning, which is too cumbersome, affects the efficiency of circuit board soldering, and generates a large amount of irritating gas during the soldering process, affecting the workers.

[0003] To address the aforementioned issues, Chinese Patent Publication No. CN222999944 U discloses a circuit board welding clamping device, comprising: a support body; a fixed base, the fixed base being fixedly installed at the bottom of the support body; a height adjustment block, the height adjustment block being slidably connected to the front side of the support body; a transmission plate, the transmission plate being provided in two sets, the two sets of transmission plates being slidably connected to both sides inside the height adjustment block; a fixed clamping plate, the fixed clamping plate being provided in two sets, the two sets of fixed clamping plates being rotatably connected to the two sets of transmission plates respectively; an adjustment component, the adjustment component being disposed inside the support body; and an air extraction component, the air extraction component being disposed inside the support body.

[0004] This device offers advantages such as rapid adjustment, ease of use, and reduced odor, making welding operations smoother for workers and minimizing the impact of irritating gases during welding.

[0005] The above-mentioned device has the following problems in actual use: If the filter chamber of the device becomes clogged during use, it will greatly increase the resistance to gas flow, directly causing the exhaust ventilation efficiency of the exhaust component to drop sharply. It will be unable to properly extract and collect the irritating fumes generated by circuit board welding through the exhaust shell, nor will it be able to effectively filter and discharge them. This will cause a large amount of irritating gas to remain in the welding operation area, which will not be able to properly eliminate the respiratory irritation to the workers, thus violating the original design intention of the exhaust component of the device. Summary of the Invention

[0006] This invention provides a circuit board welding device for the production of leakage current protection devices, which solves the problem that the gas flow effect is reduced due to the blockage of the filter chamber when the existing clamping device is used.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a circuit board welding device for producing leakage current protection devices, comprising a welding box and a plurality of vent holes on the welding box; further comprising auxiliary clamping and air extraction mechanisms symmetrically arranged on both sides inside the welding box, and a welding mechanism for welding circuit boards; the welding mechanism is located inside the welding box and connected to the welding box; the auxiliary clamping and air extraction mechanism comprises an auxiliary clamping block, an air extraction component, an air guiding component, an auxiliary clamping groove on the auxiliary clamping block, an air storage chamber inside the auxiliary clamping block, an exhaust hole on the air storage chamber, and a driving component for driving the auxiliary clamping block to reciprocate along the length direction of the welding box; the auxiliary clamping block is slidably connected to the welding box; the air extraction component and the auxiliary clamping block are slidably connected to the welding box; the auxiliary clamping block is slidably connected to the welding box; the air extraction component and the auxiliary clamping and air extraction mechanism are slidably connected to the welding box; ... The air storage chamber is connected; the air guiding assembly includes an adjusting slide plate, an upper filter plate, a lower filter plate, an inner cavity on the auxiliary clamping block, an upper air hole on the auxiliary clamping block, a lower air hole on the auxiliary clamping block, an upper scraper groove on the upper air hole, a lower scraper groove on the lower air hole, and a power unit for driving the adjusting slide plate to perform vertical reciprocating motion; the inner cavity is connected to the upper air hole and the lower air hole respectively; both the upper air hole and the lower air hole are connected to the air storage chamber; the adjusting slide plate is slidably connected to the inner cavity; both ends of the adjusting slide plate are fixedly connected to the upper filter plate and the lower filter plate respectively; the upper filter plate is located in the upper air hole and can slide in and out of the upper scraper groove, and the lower filter plate is located in the lower air hole and can slide in and out of the lower scraper groove.

[0008] Furthermore, it also includes an upper auxiliary scraper and a lower auxiliary scraper; the upper auxiliary scraper is fixedly connected to the upper scraper groove and abuts against the upper filter plate; the lower auxiliary scraper is fixedly connected to the lower scraper groove and abuts against the lower filter plate.

[0009] Furthermore, it also includes several air guiding and regulating sections equidistantly arranged along the length of the upper air hole; the air guiding and regulating section includes an adjusting shaft, regulating airflow blocks symmetrically arranged at both ends of the adjusting shaft, and a drive unit for driving the adjusting shaft to rotate forward and reverse; the adjusting shaft is located in the inner cavity and is rotatably connected to the inner cavity; the two regulating airflow blocks are located in the upper air hole and the lower air hole respectively, and the regulating airflow blocks are fixedly connected to the adjusting shaft.

[0010] Furthermore, the air guiding and regulating section also includes auxiliary regulating units symmetrically arranged on both sides of the regulating airflow block; the auxiliary regulating unit includes an auxiliary block, a side flow guide angle opened on the auxiliary block, and an inner sliding hole opened on the regulating plate; the auxiliary block is slidably connected to the inner sliding hole; the two ends of the auxiliary block can respectively abut against the upper air hole and the lower air hole.

[0011] Furthermore, it also includes symmetrically arranged inner scrapers at both ends of the adjusting shaft; the inner scrapers are located inside the inner cavity; the inner scrapers are connected to the inner cavity and are in contact with the adjusting slide plate.

[0012] Furthermore, the adjusting shaft is a bidirectional screw; the air guiding adjusting unit also includes auxiliary units symmetrically arranged at both ends of the bidirectional screw; the auxiliary unit includes a guide rod and a nut seat; the guide rod is fixedly connected to the inner cavity; the nut seat is slidably connected to the guide rod, and the nut seat is threadedly connected to the bidirectional screw; the nut seat is fixedly connected to the linkage inner scraper.

[0013] Furthermore, the power unit includes a drive cylinder and a guide plate; the drive cylinder is fixedly connected to the air storage chamber; the guide plate is fixedly connected to the adjusting slide and the output shaft of the drive cylinder respectively.

[0014] Furthermore, it also includes a power unit disposed within the inner cavity; the power unit includes a worm gear and a power component for driving the worm gear to rotate; the worm gear is rotatably connected to the inner cavity; the drive unit is a worm wheel; the worm wheel is fixedly connected to the adjusting shaft, and the worm wheel meshes with the worm gear.

[0015] Furthermore, the power components include a gear, a rack, and a groove on the adjusting slide plate; the gear is fixedly connected to the worm gear; the rack is fixedly connected to the groove, and the rack meshes with the gear.

[0016] Furthermore, a gas purification plate is fixedly attached to the exhaust port.

[0017] The principle and advantages of this scheme are: 1. The welding mechanism, coupled with symmetrical auxiliary clamps that can reciprocate along the length of the welding box, allows for rapid adaptation of leakage current protection circuit boards of different sizes, significantly improving welding efficiency. Simultaneously, the auxiliary clamps on both sides are equipped with corresponding clamping grooves, providing stable clamping and limiting to both sides of the circuit board, preventing displacement or tilting during welding. This structurally ensures the alignment accuracy of the welding points, effectively improving the welding quality of the finished circuit board.

[0018] 2. The auxiliary clamping blocks arranged symmetrically on both sides can be independently adjusted in displacement distance by a power cylinder, thus flexibly adapting to the clamping requirements of leakage protection circuit boards of different specifications and sizes. There is no need to replace the clamping parts of different specifications. One set of equipment can cover the welding operation scenarios of multiple circuit boards, reducing the equipment investment cost required for production.

[0019] 3. The entire auxiliary clamp extraction mechanism can simultaneously extract fumes from the welding area during welding. With the gas purification plate at the end, it can purify the irritating exhaust gases generated during welding before discharging them, greatly reducing the irritating gases that diffuse into the operating area during welding and effectively reducing the irritation of harmful fumes to the respiratory tract of operators.

[0020] 4. The device is equipped with a multi-level filtration structure, consisting of an upper filter plate and a lower filter plate forming a dual filtration module. The two air paths corresponding to the upper and lower air holes respectively complete the interception of impurities. Compared with a single filtration structure, it can significantly improve the filtration and interception efficiency of particulate matter in flue gas and prevent large welding fume impurities from directly entering the air extraction component and causing component damage.

[0021] 5. The upper and lower filter plates can slide in and out of the upper and lower scraping grooves as the adjusting slide plate moves vertically back and forth. With the upper and lower auxiliary scraping brushes fixed in the grooves, the dust and welding fume particles accumulated on the plate surface can be scraped off directly during the movement of the filter plates. The surface cleaning of the filter components can be completed without manual disassembly of the device, which greatly reduces the difficulty of daily operation and maintenance.

[0022] 6. When the adjusting slide moves synchronously with the upper and lower filter plates, the rack on the plate surface will synchronously drive the gear and worm to rotate, which in turn drives the meshing worm wheel and the bidirectional screw, which serves as the adjusting shaft, to rotate synchronously. This drives the nut seats on both sides to reciprocate along the guide rod, causing the inner scraper to synchronously scrape and clean the surface of the adjusting slide, preventing impurities from accumulating and forming clumps inside the air passage, maintaining the cleanliness of the inner cavity for a long time, and reducing the probability of air passage blockage.

[0023] 7. When the adjusting shaft drives the adjusting airflow blocks at both ends to rotate synchronously, the flow cross-sectional area inside the upper and lower air holes can be adjusted in real time by changing the deflection angle of the adjusting airflow blocks. This allows for adaptation to welding fumes of different concentrations and flow rates, flexibly adjusting the suction force of the two air paths to ensure that low-concentration welding fumes can be completely sucked up, and high-concentration welding fumes will not leak due to untimely suction.

[0024] 8. During the process of adjusting the slide plate and moving the auxiliary block back to the reset position, the auxiliary block can alternately abut against the upper and lower air holes at its upper and lower ends, and then slide into the upper and lower air holes respectively. This further assists in adjusting the airflow distribution of the two air paths. Together with the synchronously rotating airflow adjustment block, it achieves dynamic optimization of the airflow field, avoids turbulence and uneven suction in the air path, and makes the smoke extraction process more stable and smooth. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an embodiment of a circuit board welding device for producing a leakage current protection device according to the present invention.

[0026] Figure 2 for Figure 1 A schematic diagram of the internal structure of the welding box.

[0027] Figure 3 for Figure 2 A partial structural diagram.

[0028] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0029] Figure 5 for Figure 3 A schematic diagram of the internal structure of the inner cavity.

[0030] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0031] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0032] Figure 8 for Figure 5 A schematic diagram of the internal structure of the gas storage chamber. Detailed Implementation

[0033] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: welding box 1, vent hole 2, receiving box 3, welding torch 4, auxiliary clamping block 5, auxiliary clamping groove 6, blower 7, adjusting slide plate 8, upper filter plate 9, lower filter plate 10, power cylinder 11, adjusting shaft 12, adjusting airflow block 13, auxiliary block 14, linkage inner scraper block 15, guide rod 16, nut seat 17, drive cylinder 18, guide plate 19, worm gear 20, worm wheel 21, gear 22, rack 23, and gas purification plate 24.

[0034] The basic implementation examples are as follows: Figure 1 , 2 As shown in points 3, 4, 5, 6, 7, and 8: This invention provides a circuit board welding device for manufacturing residual current devices (RCDs), comprising a welding box 1 and a plurality of vent holes 2 on the welding box 1; it also includes auxiliary clamping and air extraction mechanisms symmetrically arranged on both sides of the welding box 1 along its width direction, and a welding mechanism for welding circuit boards; the welding mechanism is located inside the welding box 1 and connected to the welding box 1; the welding mechanism includes a receiving box 3 with a bottom opening, a robotic arm, and a welding torch 4; the receiving box 3 is fixedly connected to the top of the inner wall of the welding box 1; the robotic arm is fixedly connected to the inner wall of the receiving box 3; the welding torch 4 is fixedly connected to the movable end of the robotic arm; the auxiliary clamping and air extraction mechanism includes an auxiliary clamping block 5, an air extraction component, an air guiding component, an auxiliary clamping groove 6 on the auxiliary clamping block 5, an air storage chamber inside the auxiliary clamping block 5, an exhaust hole on the air storage chamber, and a drive component for driving the auxiliary clamping block 5 to reciprocate along the length direction of the welding box 1; the auxiliary clamping block 5 is slidably connected to the welding box 1; the air extraction component is connected to the air storage chamber. The chamber is connected, and the exhaust assembly uses a blower 7; the air guiding assembly includes an adjusting slide plate 8, an upper filter plate 9, a lower filter plate 10, an inner cavity opened on the auxiliary clamping block 5, an upper air hole opened on the auxiliary clamping block 5, a lower air hole opened on the auxiliary clamping block 5, an upper scraper groove opened on the upper air hole, a lower scraper groove opened on the lower air hole, and a power unit for driving the adjusting slide plate 8 to perform vertical reciprocating motion; the inner cavity is located between the upper air hole and the lower air hole, with the upper air hole located above the inner cavity and the lower air hole located below. Below the air vent; the inner cavity is connected to the upper air vent and the lower air vent respectively; both the upper air vent and the lower air vent are connected to the air storage chamber; the adjusting slide plate 8 is slidably connected to the inner cavity; the two ends of the adjusting slide plate 8 are fixedly connected to the upper filter plate 9 and the lower filter plate 10 respectively; the upper scraper groove is located above the upper air vent, and the lower scraper groove is located below the lower air vent; the upper filter plate 9 is located in the upper air vent and can slide in and out of the upper scraper groove, and the lower filter plate 10 is located in the lower air vent and can slide in and out of the lower scraper groove.

[0035] The drive assembly is a power cylinder 11; the power cylinder 11 is fixedly connected to the welding box 1, and the output shaft of the power cylinder 11 is fixedly connected to the auxiliary clamping block 5.

[0036] It also includes an upper auxiliary scraper and a lower auxiliary scraper; the upper auxiliary scraper is located in the upper scraper groove; the upper auxiliary scraper is fixedly connected to the upper scraper groove and abuts against the upper filter plate 9; the lower auxiliary scraper is located in the lower scraper groove; the lower auxiliary scraper is fixedly connected to the lower scraper groove and abuts against the lower filter plate 10.

[0037] It also includes several air guiding and regulating sections equidistantly arranged along the length of the upper air hole; the air guiding and regulating section includes an adjusting shaft 12, regulating airflow blocks 13 symmetrically arranged at the upper and lower ends of the adjusting shaft 12, and a drive unit for driving the adjusting shaft 12 to rotate forward and reverse; the adjusting shaft 12 is located in the inner cavity and is rotatably connected to the inner cavity; the upper and lower ends of the adjusting shaft 12 extend into the upper air hole and the lower air hole respectively; the two regulating airflow blocks 13 are located in the upper air hole and the lower air hole respectively, and the regulating airflow blocks 13 are fixedly connected to the adjusting shaft 12.

[0038] The airflow regulating section also includes auxiliary regulating units symmetrically arranged on the left and right sides of the regulating airflow block 13; the auxiliary regulating unit includes an auxiliary block 14, a side flow guide angle opened on the auxiliary block 14, and an inner sliding hole opened on the regulating slide plate 8; the auxiliary block 14 is slidably connected to the inner sliding hole; the two ends of the auxiliary block 14 can respectively abut against the upper air hole and the lower air hole; the initial state of the auxiliary block 14 is as follows Figure 6 As shown, the lower end of the auxiliary block 14 is located in the inner sliding hole, and the upper end of the auxiliary block 14 is located in the upper air hole and abuts against the upper air hole. As the auxiliary block 14 moves synchronously with the adjusting slide plate 8, the upper end of the auxiliary block 14 can gradually slide into the adjusting slide plate 8, and the lower end of the auxiliary block 14 can gradually slide into the lower air hole. By reciprocating in this way, the auxiliary block 14 can slide into the upper and lower air holes respectively by abutting against the upper and lower air holes respectively.

[0039] It also includes linkage inner scraper blocks 15 symmetrically arranged at the upper and lower ends of the adjustment shaft 12; the linkage inner scraper blocks 15 are located in the inner cavity; the linkage inner scraper blocks 15 are connected to the inner cavity and are in contact with the adjustment slide plate 8.

[0040] The adjusting shaft 12 is a bidirectional screw; only the portion of the adjusting shaft 12 located inside the inner cavity has threaded grooves at both the upper and lower ends; the air guiding adjustment unit also includes auxiliary units symmetrically arranged at the upper and lower ends of the bidirectional screw; the auxiliary unit includes a guide rod 16 and a nut seat 17; the guide rod 16 is fixedly connected to the inner cavity; the nut seat 17 is slidably connected to the guide rod 16, and the nut seat 17 is threadedly connected to the bidirectional screw; the nut seat 17 is fixedly connected to the linkage inner scraper block 15.

[0041] The power unit includes a drive cylinder 18 and a guide plate 19; the drive cylinder 18 is fixedly connected to the air storage chamber; the guide plate 19 is fixedly connected to the adjusting slide plate 8 and the output shaft of the drive cylinder 18 respectively.

[0042] It also includes a power unit installed in the inner cavity; the power unit includes a worm 20 and a power component for driving the worm 20 to rotate; the worm 20 is rotatably connected to the inner cavity; the drive unit is a worm wheel 21; the worm wheel 21 is fixedly connected to the adjusting shaft 12 and meshes with the worm 20.

[0043] The power components include a gear 22, a rack 23, and a groove on the adjusting slide plate 8; the gear 22 is fixedly connected to the worm gear 20; the rack 23 is fixedly connected to the groove, and the rack 23 meshes with the gear 22.

[0044] A gas purification plate 24 is fixedly attached to the exhaust port.

[0045] Specific implementation process: After the circuit board is placed in the welding box 1, a power cylinder 11 inside the welding box 1 can drive the auxiliary clamping block 5 to reciprocate. Through the reciprocating symmetrical auxiliary clamping block 5, circuit boards of different sizes of leakage current protection devices can be quickly adapted, significantly improving the welding efficiency of the circuit board. Simultaneously, the auxiliary clamping blocks 5 on both sides are equipped with corresponding auxiliary clamping grooves 6, which can form a stable limiting clamp on both sides of the circuit board, preventing the circuit board from shifting or tilting during welding. This structurally ensures the alignment accuracy of the welding points and effectively improves the welding quality of the finished circuit board.

[0046] The auxiliary clamping blocks 5, which are symmetrically arranged on both sides, can be independently adjusted in displacement distance by the power cylinder 11, so as to flexibly adapt to the clamping requirements of leakage protection circuit boards of different specifications and sizes. There is no need to replace the clamping parts of different specifications. One set of equipment can cover the welding operation scenarios of multiple circuit boards, reducing the equipment investment cost required for production.

[0047] During the clamping and fixing of the circuit board, the welding gun 4 is moved by the robotic arm to perform welding operations on the positions on the circuit board that need to be welded, thereby ensuring the efficient execution of the welding operation.

[0048] During circuit board soldering, the blower 7 can extract fumes from the soldering area, and with the gas purification plate 24 at the end, it can purify the irritating exhaust gas generated during soldering before discharge, greatly reducing the irritating gases that diffuse into the operating area during the soldering process, and effectively reducing the irritation of harmful fumes to the respiratory tract of operators.

[0049] During the gas extraction process, the blower 7 uses a dual filtration module consisting of an upper filter plate 9 and a lower filter plate 10 to intercept impurities through two air paths corresponding to the upper and lower air holes. Compared with a single filtration structure, this can significantly improve the filtration efficiency of particulate matter in the flue gas and prevent large welding fume impurities from directly entering the extraction assembly and causing component damage.

[0050] During the filtration of gas impurities by the upper filter plate 9 and lower filter plate 10, the output shaft of the drive cylinder 18 drives the guide plate 19 to perform vertical reciprocating motion, which in turn drives the adjusting slide plate 8 to perform vertical reciprocating motion synchronously. Therefore, the upper filter plate 9 and lower filter plate 10 can also perform vertical reciprocating motion synchronously with the adjusting slide plate 8, completing the sliding in and out action in the upper scraper groove and lower scraper groove. With the upper auxiliary scraper brush and lower auxiliary scraper brush fixed in the groove, the dust and welding fume particles accumulated on the plate surface can be directly scraped off during the movement of the filter plate. The surface cleaning of the filter components can be completed without manual disassembly of the device, which greatly reduces the difficulty of daily operation and maintenance.

[0051] When the adjusting slide plate 8 moves synchronously with the upper filter plate 9 and the lower filter plate 10, the rack 23 on the plate surface will synchronously drive the gear 22 and the worm 20 to rotate, which in turn drives the meshing worm wheel 21 and the bidirectional screw that serves as the adjusting shaft 12 to rotate synchronously. This drives the nut seats 17 on both sides to reciprocate along the guide rod 16, which drives the inner scraper block 15 to synchronously scrape and clean the surface of the adjusting slide plate 8, preventing impurities from accumulating and forming clumps inside the air passage, maintaining the cleanliness of the inner cavity for a long time, and reducing the probability of air passage blockage.

[0052] During the rotation of the adjusting shaft 12, when the adjusting shaft 12 drives the adjusting airflow blocks 13 at both ends to rotate synchronously, the flow cross-sectional area inside the upper and lower air holes can be adjusted in real time by changing the deflection angle of the adjusting airflow blocks 13. This allows for adaptation to welding fumes of different concentrations and flow rates, flexibly adjusting the suction force of the two air paths, ensuring that low-concentration welding fumes can be completely sucked up, and preventing leakage problems caused by untimely suction of high-concentration welding fumes.

[0053] As the adjusting slide plate 8 moves the auxiliary block 14 back to its original position, the auxiliary block 14 can alternately abut against the upper and lower air holes at its upper and lower ends, and then slide into the upper and lower air holes respectively. This further assists in adjusting the airflow distribution of the two air paths. Together with the synchronously rotating adjusting airflow block 13, it achieves dynamic optimization of the airflow field, avoids turbulence and uneven suction inside the air path, and makes the smoke extraction process more stable and smooth.

[0054] In summary, this invention supports the rapid clamping of circuit boards of various specifications and thicknesses, and features a built-in welding fume extraction and purification module with adjustable position. Combined with a graded filtration and linked self-cleaning structure, it effectively intercepts irritating fumes and particulate matter generated during welding, preventing harmful gases from spreading and irritating the operator's respiratory tract. It also automatically cleans accumulated welding dust from the filter components, maintaining unobstructed airflow over the long term. Furthermore, the device allows for flexible adjustment of the welding operation height to suit different operators' habits, and its fully mechanically guided transmission structure adapts to the complex, dusty conditions of welding workshops. It operates stably with few malfunctions over the long term, truly achieving multiple practical benefits: ease of operation, increased efficiency, and adequate occupational protection.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A circuit board welding device for manufacturing residual current devices (RCDs), comprising a welding box and a plurality of vent holes on the welding box; characterized in that: It also includes auxiliary clamping and air extraction mechanisms symmetrically arranged on both sides of the welding box, and a welding mechanism for welding circuit boards; the welding mechanism is located inside the welding box and connected to the welding box; the auxiliary clamping and air extraction mechanism includes an auxiliary clamping block, an air extraction assembly, an air guiding assembly, an auxiliary clamping groove on the auxiliary clamping block, an air storage chamber inside the auxiliary clamping block, an exhaust hole on the air storage chamber, and a drive assembly for driving the auxiliary clamping block to reciprocate along the length of the welding box; the auxiliary clamping block is slidably connected to the welding box; the air extraction assembly is connected to the air storage chamber; the air guiding assembly includes an adjusting slide plate, an upper filter plate, a lower filter plate, and an opening... The auxiliary clamping block has an inner cavity, an upper air hole, a lower air hole, an upper scraper groove on the upper air hole, a lower scraper groove on the lower air hole, and a power unit for driving the adjusting slide plate to make vertical reciprocating motion. The inner cavity is connected to the upper air hole and the lower air hole respectively. The upper air hole and the lower air hole are both connected to the air storage chamber. The adjusting slide plate is slidably connected to the inner cavity. The two ends of the adjusting slide plate are fixedly connected to the upper filter plate and the lower filter plate respectively. The upper filter plate is located in the upper air hole and can slide in and out of the upper scraper groove. The lower filter plate is located in the lower air hole and can slide in and out of the lower scraper groove.

2. The circuit board welding device for producing a residual current device according to claim 1, characterized in that: It also includes an upper auxiliary scraper and a lower auxiliary scraper; the upper auxiliary scraper is fixedly connected to the upper scraper groove and abuts against the upper filter plate; the lower auxiliary scraper is fixedly connected to the lower scraper groove and abuts against the lower filter plate.

3. The circuit board welding device for producing a residual current device according to claim 1, characterized in that: It also includes several air guiding and regulating sections equidistantly arranged along the length of the upper air hole; the air guiding and regulating section includes an adjusting shaft, regulating airflow blocks symmetrically arranged at both ends of the adjusting shaft, and a drive unit for driving the adjusting shaft to rotate forward and reverse; the adjusting shaft is located in the inner cavity and is rotatably connected to the inner cavity; the two regulating airflow blocks are located in the upper air hole and the lower air hole respectively, and the regulating airflow blocks are fixedly connected to the adjusting shaft.

4. The circuit board welding device for producing a residual current device according to claim 3, characterized in that: The airflow regulating section also includes auxiliary regulating units symmetrically arranged on both sides of the regulating airflow block; the auxiliary regulating unit includes an auxiliary block, a side flow guide angle opened on the auxiliary block, and an inner sliding hole opened on the regulating plate; the auxiliary block is slidably connected to the inner sliding hole; the two ends of the auxiliary block can respectively abut against the upper air hole and the lower air hole.

5. The circuit board welding device for producing a residual current device according to claim 3, characterized in that: It also includes symmetrically arranged inner scraper blocks at both ends of the adjusting shaft; the inner scraper blocks are located inside the inner cavity; the inner scraper blocks are connected to the inner cavity and are in contact with the adjusting slide plate.

6. The circuit board welding device for producing a residual current device according to claim 5, characterized in that: The adjusting shaft is a bidirectional screw; the air guiding adjusting unit also includes auxiliary units symmetrically arranged at both ends of the bidirectional screw; the auxiliary unit includes a guide rod and a nut seat; the guide rod is fixedly connected to the inner cavity; the nut seat is slidably connected to the guide rod, and the nut seat is threadedly connected to the bidirectional screw; the nut seat is fixedly connected to the linkage inner scraper.

7. The circuit board welding device for producing a residual current device according to claim 1, characterized in that: The power unit includes a drive cylinder and a guide plate; the drive cylinder is fixedly connected to the air storage chamber; the guide plate is fixedly connected to the adjusting slide and the output shaft of the drive cylinder respectively.

8. The circuit board welding device for producing a residual current device according to claim 3, characterized in that: It also includes a power unit installed inside the inner cavity; the power unit includes a worm and a power component for driving the worm to rotate; the worm is rotatably connected to the inner cavity; the drive unit is a worm wheel; the worm wheel is fixedly connected to the adjusting shaft and meshes with the worm.

9. A circuit board welding device for manufacturing residual current devices according to claim 8, characterized in that: The power components include gears, racks, and grooves on the adjusting slide plate; the gears are fixedly connected to the worm gear; the racks are fixedly connected to the grooves, and the racks mesh with the gears.

10. A circuit board welding device for manufacturing residual current devices according to claim 1, characterized in that: A gas purification plate is fixed to the exhaust port.

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