Filter suitable for automatic manufacturing and manufacturing method thereof

Abstract

The invention provides a filter suitable for automatic manufacturing and a manufacturing method thereof, and relates to the technical field of filters. The filter comprises a shell, a filter element, a connecting terminal and an end cover are arranged in the shell, the filter further comprises a PCB, and the filter element, the PCB, the connecting terminal and the end cover are vertically distributed according to the sequence; one surface of the PCB is conductively connected with the filter element, and the other surface of the PCB is conductively connected with the connecting terminal; the filter element comprises a flat wire inductor, the flat wire inductor comprises a square magnetic core and two flat copper coils, and the two flat copper coils are respectively wound on two sides of the magnetic core and then are conductively connected with the PCB. The manufacturing method comprises the following steps: A, automatically manufacturing the flat wire inductor; and B, automatically assembling and welding the PCB. On the basis, the problems of low production efficiency, limited performance and low reliability caused by the defects of an existing filter in structural composition and manufacturing method are solved.

Description

Technical Field

[0001] This invention relates to the field of filter technology, specifically to a filter suitable for automated manufacturing and its manufacturing method. Background Technology

[0002] Filters, as key devices in signal processing, are widely used in communication transmission, industrial automation, intelligent driving in automobiles, optoelectronic systems, and other technical fields. With the continuous expansion of the filter market, efficient manufacturing and high performance have become important future development directions. However, current traditional filters have many shortcomings, manifesting in low manufacturing efficiency, limited performance, and low reliability in practical applications, making it difficult to meet the aforementioned market demands. Specifically:

[0003] In existing filters, a common component assembly method involves manually winding and soldering circular wire inductors and their leads. Specifically, the inductor refers to an inductor formed by manually winding two sets of circular copper coils around a toroidal magnet, as exemplified by the inductor in a power filter proposed in Chinese Patent No. CN208522651U. This inductor structure suffers from performance defects such as small effective conductive area and uneven current density distribution, as well as aesthetic defects such as bulkiness, large size, and inconsistent wire spacing. Furthermore, manual winding leads to low manufacturing efficiency, high cost, poor product consistency, and high defect rates. The component assembly method specifically refers to directly manually winding and soldering the leads of electronic components during the assembly of the filter. This results in a non-compact, unstable, and unsightly component layout, and the manual winding and soldering process is inefficient. Additionally, this assembly method is difficult to automate for mass production.

[0004] In summary, this invention provides a filter suitable for automated manufacturing and a method for manufacturing the same. Summary of the Invention

[0005] The purpose of this invention is to provide a filter and its manufacturing method suitable for automated manufacturing, so as to solve the problems mentioned in the background art, that existing filters have deficiencies in structural composition and manufacturing methods, which lead to low production efficiency, limited performance and low reliability.

[0006] This invention is achieved using the following technical solution:

[0007] A filter suitable for automated manufacturing includes a housing containing a filter element, connecting terminals, and an end cap, and also includes a PCB board. The filter element, PCB board, connecting terminals, and end cap are vertically arranged in the specified order. One side of the PCB board is electrically connected to the filter element, and the other side is electrically connected to the connecting terminals. The filter element includes a flat wire inductor, which comprises a square magnetic core and two flat copper coils. The two flat copper coils are wound around both sides of the magnetic core and then electrically connected to the PCB board.

[0008] The filter provided by this invention can reduce product size, enable automated production, and improve product performance. Specifically: First, the vertical layout of each structure significantly reduces the horizontal space occupied, achieving miniaturization and greatly improving space utilization, while also facilitating automated processing. Second, the use of flat wire inductors, with their shape orientation and winding regularity, makes them easier for automated winding equipment to process. This overcomes the limitations of traditional inductors requiring manual manufacturing, laying the foundation for fully automated filter production. Thirdly, using a PCB board allows for the integration of filter components into a neat layout, resulting in a smaller product size and a more aesthetically pleasing form factor. Furthermore, the PCB board acts as a wiring base; the internal conductive connections of the filter are completed through precision-etched copper foil traces. The neat PCB wiring shortens the current path, provides more controllable and lower connection impedance, reduces electromagnetic interference and parasitic effects, and thus improves the overall performance of the filter. Simultaneously, the PCB board provides a rigid mounting platform for each component. Compared to the traditional method of directly connecting via wires and solder joints, this results in more robust connections, stronger vibration and shock resistance, and easier operation when maintenance or component replacement is required. In addition, the PCB board provides standardized pads and connection points, enabling automated soldering and helping to ensure consistent soldering quality, significantly reducing product variations caused by manual intervention.

[0009] Furthermore, the end cap includes a cover plate, one side of which is provided with a receiving groove, the receiving groove and the cover plate being integrally formed; the receiving groove is provided with an embedded connecting terminal, the connecting terminal extending out of the other side of the cover plate and being electrically connected to the PCB board.

[0010] In this filter, an integrated, molded receiving groove is provided on the end cap to embed the connecting terminals. Compared with the connecting terminals directly exposed on the end cap in traditional filter structures, this offers the following advantages: Firstly, improved protection performance. By encasing the connecting terminals in the receiving groove, external contamination can be isolated to a certain extent, effectively preventing the intrusion of dust, moisture, and foreign objects, thus protecting the connecting terminals from corrosion and improving insulation performance, thereby significantly extending product lifespan. Secondly, improved structural stability and reliability. The integrated molding of the end cap and the receiving groove, with the connecting terminals embedded in the groove, effectively prevents the connecting terminals from shifting or loosening, ensuring the stability of the electrical connection and reducing faults such as poor contact. Furthermore, the mutual support between the connecting terminals and the end cap enhances the overall mechanical strength of the filter, enabling it to better withstand the effects of vibration, impact, insertion, and removal in complex working environments, reducing the risk of damage, improving reliability and service life, and lowering subsequent maintenance and replacement costs. Thirdly, it improves the layout effect. By embedding the connecting terminals in the receiving slots, the structure becomes more regular, enhancing the integrity of the product design and better adapting to the current trend of miniaturization and integration. Fourthly, it improves assembly efficiency and accuracy. The integrated embedded design eliminates the need for separate assembly of connecting terminals and end caps during filter manufacturing, significantly shortening production line time, increasing production efficiency, and reducing costs associated with parts processing, storage, and management. Furthermore, the end caps and connecting terminals move synchronously during insertion and removal, preventing errors such as missing or misaligned end caps, thereby reducing quality risks.

[0011] Furthermore, a fuse is electrically connected to the side of the PCB board that connects to the filter element. The fuse is located between the magnetic core of the flat wire inductor and the PCB board. By setting up the PCB board, a dedicated location is provided for installing the fuse, thereby enabling the filter to have overcurrent protection, effectively protecting the filter itself and downstream circuits from damage.

[0012] Furthermore, the filter element also includes two Y capacitors, a discharge resistor, an X capacitor, and a varistor. The two Y capacitors are symmetrically distributed, and the Y capacitors, discharge resistor, X capacitor, and varistor are all located between the magnetic core of the flat wire inductor and the PCB board.

[0013] Furthermore, the number of the receiving slots is several, and the several receiving slots are divided into direct-connection receiving slots and spare receiving slots. The direct-connection receiving slots are provided with embedded connection terminals, and the spare receiving slots are not provided with connection terminals but are provided with embedding ports for embedding connection terminals.

[0014] A method for manufacturing a filter suitable for automated manufacturing, for manufacturing the filter described above suitable for automated manufacturing, includes the following steps:

[0015] Step A: Automated fabrication of flat wire inductors;

[0016] Step B: Automated assembly and soldering of PCB boards;

[0017] Step A includes the following sub-steps:

[0018] Step A1: Winding the wire;

[0019] Step A2: Plastic surgery;

[0020] Step A3: Dip in solder;

[0021] Step B includes the following sub-steps:

[0022] Step B1: Assemble and solder the bottom surface of the PCB board;

[0023] Step B2: Assemble and solder the top surface of the PCB board.

[0024] The manufacturing method provided by this invention, which defines the specific steps and sequence described above, can improve production efficiency, ensure product quality, and reduce costs. Specifically, by performing the above steps, the time-consuming manual twisting and welding operations in traditional manual manufacturing methods can be avoided, reducing the time and error of manual operation, significantly shortening the production cycle, and greatly improving production efficiency. Processing according to the specific step sequence ensures that each processing link is closely connected, effectively controlling the quality of each link, thereby guaranteeing the overall quality and performance of the filter. Furthermore, automated equipment can precisely control the welding temperature, time, and amount of solder, ensuring highly consistent and reliable welding quality, eliminating the individual differences and defect rate risks associated with manual operation, such as poor contact, stress concentration, wire burrs, short circuits, incomplete soldering, and wire breaks caused by manual twisting of wires. The automated manufacturing method reduces raw material waste, improves product yield, and lowers production costs; it also reduces reliance on skilled welding workers, thereby reducing labor costs and management complexity.

[0025] Further, in step A1, after the automatic transmission system transports the magnetic core to the winding station, the automatic winding equipment drives the flat copper coil to wind onto the magnetic core according to preset parameters; during this process, the tension sensor and vision inspection system monitor and provide feedback on the winding status in real time; in step A2, after the winding is completed, the automatic forming equipment shapes the pins of the flat wire inductor, controlling the bending angle and positioning dimensions to ensure that the pin spacing and perpendicularity meet the process requirements of subsequent assembly and soldering; in step A3, after the shaping is completed, the automatic robotic arm picks up the flat wire inductor and, according to the set depth tolerance and tinning time, controls the pins of the flat wire inductor to be inserted into the constant temperature soldering furnace for tinning.

[0026] Furthermore, step A also includes the following sub-steps:

[0027] Step A4: Inspection; The appearance parameters of the flat wire inductor are inspected by a visual AOI inspection device, and then the electrical performance parameters of the flat wire inductor are inspected by an LCR meter testing device. During the inspection process, unqualified flat wire inductors are screened out and removed. The appearance parameters include whether the winding is neat, whether the wire sheath is damaged, and whether the solder joints are qualified. The electrical performance parameters include inductance, impedance, and DC resistance.

[0028] Further, step B1 includes the following sub-steps:

[0029] Step B1-1: Component assembly; The insertion device based on the vision positioning system inserts various electronic components, including flat wire inductors, into the preset pad holes on the bottom surface of the PCB board.

[0030] Step B1-2: Circuit board soldering; The assembled PCB board is passed through a wave soldering oven at a constant speed via a chain-type transmission line to solder the pins of various electronic components to the pads on the bottom surface of the PCB board.

[0031] Step B1-3: Inspection; The soldered PCB board is transported to the inspection station, where the quality of the solder joints is inspected by visual AOI inspection equipment, and the electrical performance of the PCB board is inspected by electrical performance testing equipment.

[0032] Further, step B2 includes the following sub-steps:

[0033] Step B2-1: Component assembly; The automated insertion equipment positions the top surface of the PCB board after the bottom surface has been soldered, and then inserts the pins of the connecting terminals on the end cap into the pad holes on the top surface of the PCB board in a preset direction.

[0034] Step B2-2: Welding; The automated robotic arm transfers the assembled PCB board to the jet soldering station. The jet soldering equipment welds the pins of the connecting terminals to the joint of the top surface of the PCB board to form a filter semi-finished product. During this process, the automatic detection equipment detects and controls the welding time and welding temperature.

[0035] Step B2-3: Inspection; The automated robotic arm places the welded filter semi-finished product onto the automated testing platform, where the LCR meter and integrated tester perform fully automated inspection of the filter semi-finished product.

[0036] The beneficial effects achieved by this invention are:

[0037] This invention provides a filter suitable for automated manufacturing and its manufacturing method. Compared with traditional filter structures and manufacturing methods, this invention incorporates a PCB board and flat wire inductors. The overall structural design is adapted to automated manufacturing processes. Inductor winding, component assembly and soldering, finished product manufacturing, and testing can all be completed through automated steps, thereby effectively reducing production costs, avoiding quality variations caused by human factors, improving product consistency, and reducing defect rates. While achieving automated production, this invention also improves the electrical performance of the filter, such as reducing losses and improving frequency characteristics. Simultaneously, the compact design reduces product size and cost, meeting the miniaturization requirements of modern equipment. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of the filter described in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the PCB board and its filtering components in the filter described in the embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the connection layout of various components on the PCB board in the filter described in this embodiment of the invention;

[0041] Figure 4 This is a schematic diagram of the flat wire inductor structure in the filter described in this embodiment of the invention;

[0042] Figure 5 This is a schematic diagram of the structure of the end cap and connecting terminal in the filter according to an embodiment of the present invention;

[0043] Figure 6 This is an interference voltage curve from the overall test data of the filter described in this embodiment of the invention;

[0044] Figure 7 It is the interference voltage curve in the overall test data of a traditional filter;

[0045] Figure 8 This is an interference power curve from the overall test data of the filter described in this embodiment of the invention;

[0046] Figure 9 It is an interference power curve from the overall test data of a traditional filter;

[0047] In the diagram: 1. End cap; 11. Receiving groove; 12. Connecting terminal; 13. Cover plate; 2. PCB board; 3. Flat wire inductor; 31. Magnetic core; 32. Flat copper coil; 4. Fuse. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0049] Example 1

[0050] The first aspect of this embodiment provides a filter suitable for automated manufacturing. Please refer to [reference needed]. Figures 1 to 5 The system includes a housing (not shown in the figure), inside which are disposed a filter element, a PCB board 2, a connecting terminal 12, and an end cap 1. The filter element, PCB board 2, connecting terminal 12, and end cap 1 are arranged vertically in the order described above. Specifically:

[0051] The bottom surface of PCB board 2 is electrically connected to the filter element, and the top surface is electrically connected to the connection terminal 12. The filter element includes a flat wire inductor 3, two Y capacitors, a discharge resistor, an X capacitor, and a varistor. The two Y capacitors are symmetrically distributed, and the Y capacitor, discharge resistor, X capacitor, and varistor are all located above the flat wire inductor 3. The flat wire inductor 3 includes a square magnetic core 31 and two flat copper coils 32. The two flat copper coils 32 are wound around both sides of the magnetic core 31 and electrically connected to the PCB board 2. In addition, a fuse 4 is electrically connected to the bottom surface of PCB board 2, and the fuse 4 is also located above the flat wire inductor 3.

[0052] The end cap 1 includes a cover plate 13. The upper surface of the cover plate 13 is provided with six receiving grooves 11 arranged in two rows. All six receiving grooves 11 are integrally formed with the cover plate 13. Five of the receiving grooves 11 are direct receiving grooves, in which embedded connecting terminals 12 are provided. The connecting terminals 12 extend out of the lower surface of the cover plate 13 and are electrically connected to the PCB board 2. The other receiving groove 11 is a spare receiving groove. The spare receiving groove does not have connecting terminals 12, but has an embedding port for embedding connecting terminals 12.

[0053] The second aspect of this embodiment provides a method for manufacturing a filter, used to manufacture the filter described above, comprising the following steps:

[0054] Step A: Automated fabrication of flat wire inductors 3. Specifically includes:

[0055] Step A1: Winding the wire;

[0056] After the automatic transmission system accurately delivers the magnetic core 31 to the winding station, the automatic winding equipment drives the flat copper coil 32 to be wound evenly and tightly onto the magnetic core 31 according to preset parameters (including number of turns, wire diameter, tension, winding direction, etc.). During this process, the tension sensor and vision detection system monitor and provide feedback on the winding status in real time to prevent abnormalities such as overlapping or loosening of the wire.

[0057] Step A2: Plastic surgery;

[0058] After the winding is completed, the automatic forming equipment shapes the pins of the flat wire inductor 3. The bending angle and positioning dimensions are precisely controlled by the motor to ensure that the pin spacing and perpendicularity meet the process requirements of subsequent assembly and welding.

[0059] Step A3: Dip in solder;

[0060] After the shaping is completed, the automatic robotic arm picks up the flat wire inductor 3 and controls the pins of the flat wire inductor 3 to be inserted into the constant temperature soldering furnace for soldering according to the set depth tolerance (e.g., ±0.1mm) and soldering time (e.g., ±0.5s). The depth tolerance and soldering time must meet the precision standards to ensure that the solder layer on the pin surface is uniform and full, without defects such as cold solder joints or missing solder joints.

[0061] Step A4: Detection;

[0062] The appearance parameters of the flat wire inductor 3 are detected by visual AOI inspection equipment, and the electrical performance parameters of the flat wire inductor 3 are detected by LCR meter testing equipment. During the inspection process, unqualified flat wire inductors 3 are screened out and removed. The appearance parameters include whether the winding is neat, whether the wire sheath is damaged, and whether the solder joints are qualified. The electrical performance parameters include inductance, impedance, and DC resistance.

[0063] Step B: Automated assembly and soldering of PCB board 2. Specifically includes:

[0064] Step B1: Assembly and soldering of the bottom surface of PCB board 2. This includes:

[0065] Step B1-1: Device assembly;

[0066] A high-speed insertion device based on a vision positioning system inserts various electronic components, including the flat wire inductor 3, into the preset pad holes on the bottom surface of the PCB board 2.

[0067] Step B1-2: Circuit board soldering;

[0068] The assembled PCB board 2 is passed through a wave soldering furnace at a constant speed via a chain-type transmission line, so as to achieve reliable soldering of the pins of each electronic component to the pads on the bottom surface of the PCB board 2.

[0069] Step B1-3: Detection;

[0070] The soldered PCB board 2 is transported to the inspection station, where the quality of the solder joints is inspected by visual AOI inspection equipment, and the electrical performance of the PCB board 2 is tested in conjunction with electrical performance testing equipment.

[0071] Step B2: Assembly and soldering of the top surface of PCB board 2. This includes:

[0072] Step B2-1: Device assembly;

[0073] The automated insertion equipment positions the top surface of the PCB board 2 after the bottom surface has been soldered, and then inserts the pins of the connecting terminal 12 on the end cover 1 into the pad hole slots on the top surface of the PCB board 2 in a preset direction.

[0074] Step B2-2: Welding;

[0075] An automated robotic arm transfers the assembled PCB board 2 to the jet soldering station. The jet soldering equipment performs welding on the joint between the pins of the connecting terminal 12 and the top surface of the PCB board 2 to form a filter semi-finished product. During this process, an automatic detection device detects and controls the welding time and welding temperature to avoid the high temperature affecting the electronic components connected to the bottom surface of the PCB board 2.

[0076] Step B2-3: Detection;

[0077] The automated robotic arm places the welded filter semi-finished product onto an automated testing platform, where the LCR meter and integrated testing equipment perform fully automated comprehensive testing on the filter semi-finished product.

[0078] Step C: Package the manufactured filter semi-finished product into the housing.

[0079] In summary, the filter and its manufacturing method provided in this embodiment include a PCB board 2 and a flat wire inductor 3. The structural design is adapted to automated manufacturing processes, and inductor winding, component assembly and soldering, finished product manufacturing, and testing can all be completed through automated steps. Therefore, compared with traditional filters, the filter provided in this embodiment not only has higher production efficiency but also better product performance. For example, please refer to... Figures 6 to 9 The interference voltage and interference power of the filter provided in this embodiment are significantly lower than those of traditional filters.

[0080] It should be noted that the parts not described in detail or in detail in the above solution, such as the structure and working principle of each automated system and equipment in the manufacturing method, the structure and assembly method of the filter housing, etc., are all existing technologies and are not improvements made by this invention to existing technologies, nor are they within the protection scope of this invention's technical solution. Therefore, they will not be elaborated on in this article.

[0081] Of course, the above description is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the embodiments of the present invention. The present invention is also not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of the present invention should fall within the patent coverage of the present invention.

Claims

1. A filter suitable for automated manufacturing, comprising a housing, wherein a filter element, a connecting terminal (12), and an end cap (1) are disposed within the housing, characterized in that: It also includes a PCB board (2), the filter element, PCB board (2), connection terminal (12) and end cap (1) are arranged vertically in sequence; one side of the PCB board (2) is electrically connected to the filter element and the other side is electrically connected to the connection terminal (12); the filter element includes a flat wire inductor (3), the flat wire inductor (3) includes a square magnetic core (31) and two flat copper coils (32), the two flat copper coils (32) are respectively wound around the two sides of the magnetic core (31) and electrically connected to the PCB board (2).

2. The filter suitable for automated manufacturing according to claim 1, characterized in that: The end cap (1) includes a cover plate (13), one side of which is provided with a receiving groove (11), the receiving groove (11) and the cover plate (13) are integrally formed; the receiving groove (11) is provided with an embedded connection terminal (12), the connection terminal (12) extends out of the other side of the cover plate (13) and is electrically connected to the PCB board (2).

3. The filter suitable for automated manufacturing according to claim 1, characterized in that: A fuse (4) is also electrically connected to the side of the PCB board (2) connected to the filter element. The fuse (4) is located between the magnetic core (31) of the flat wire inductor (3) and the PCB board (2).

4. The filter suitable for automated manufacturing according to claim 1, characterized in that: The filter element also includes two Y capacitors, a discharge resistor, an X capacitor and a varistor. The two Y capacitors are symmetrically distributed. The Y capacitors, discharge resistor, X capacitor and varistor are all located between the magnetic core (31) of the flat wire inductor (3) and the PCB board (2).

5. The filter suitable for automated manufacturing according to claim 2, characterized in that: The number of the receiving slots (11) is several, and the several receiving slots (11) are divided into direct receiving slots and spare receiving slots. The direct receiving slots are provided with embedded connection terminals (12), and the spare receiving slots are not provided with connection terminals (12) but are provided with embedding ports for embedding connection terminals (12).

6. A method for manufacturing a filter suitable for automated manufacturing, for manufacturing the filter suitable for automated manufacturing according to any one of claims 1-5, characterized in that, Includes the following steps: Step A: Automated fabrication of flat wire inductors (3); Step B: Automated assembly and soldering of PCB boards (2); Step A includes the following sub-steps: Step A1: Winding the wire; Step A2: Plastic surgery; Step A3: Dip in solder; Step B includes the following sub-steps: Step B1: Assembly and soldering of the bottom surface of the PCB board (2); Step B2: Assembly and soldering of the top surface of the PCB board (2).

7. The method for manufacturing a filter suitable for automated manufacturing according to claim 6, characterized in that: In step A1, after the automatic transmission system transports the magnetic core (31) to the winding station, the automatic winding equipment drives the flat copper coil (32) to wind onto the magnetic core (31) according to preset parameters; during this process, the tension sensor and vision detection system monitor and provide feedback on the winding status in real time. In step A2, after the winding is completed, the automatic forming equipment shapes the pins of the flat wire inductor (3), controls the bending angle and positioning size, so that the pin spacing and perpendicularity meet the process requirements of subsequent assembly and welding. In step A3, after the shaping is completed, the automatic robotic arm picks up the flat wire inductor (3) and controls the pins of the flat wire inductor (3) to be inserted into the constant temperature soldering furnace for soldering according to the set depth tolerance and soldering time.

8. The method for manufacturing a filter suitable for automated manufacturing according to claim 7, characterized in that, Step A further includes the following sub-steps: Step A4: Inspection; The appearance parameters of the flat wire inductor (3) are inspected by a visual AOI inspection device, and then the electrical performance parameters of the flat wire inductor (3) are inspected by an LCR meter testing device. During the inspection process, unqualified flat wire inductors (3) are screened out and removed. The appearance parameters include whether the winding is neat, whether the wire sheath is damaged and whether the solder joints are qualified. The electrical performance parameters include inductance, impedance and DC resistance.

9. The method for manufacturing a filter suitable for automated manufacturing according to claim 6, characterized in that, Step B1 includes the following sub-steps: Step B1-1: Component assembly; Based on the visual positioning system, the plug-in device inserts various electronic components, including flat wire inductors (3), into the preset pad holes on the bottom surface of the PCB board (2); Step B1-2: Circuit board soldering; The inserted PCB board (2) is passed through the wave soldering furnace at a constant speed via a chain-type transmission line to realize the soldering of the pins of each electronic component on the bottom surface of the PCB board (2) to the solder pads. Step B1-3: Inspection; The soldered PCB board (2) is transported to the inspection station, where the quality of the solder joints is inspected by the visual AOI inspection equipment, and the electrical performance of the PCB board (2) is inspected by the electrical performance testing equipment.

10. The method for manufacturing a filter suitable for automated manufacturing according to claim 6, characterized in that, Step B2 includes the following sub-steps: Step B2-1: Component assembly; The automated insertion equipment positions the top surface of the PCB board (2) after the bottom surface has been soldered, and then inserts the pins of the connecting terminal (12) on the end cap (1) into the pad slots on the top surface of the PCB board (2) in a preset direction. Step B2-2: Welding; The automated robotic arm transfers the assembled PCB board (2) to the jet welding station. The jet welding equipment welds the pins of the connecting terminal (12) to the joint of the top surface of the PCB board (2) to form a filter semi-finished product. During this process, the automatic detection equipment detects and controls the welding time and welding temperature. Step B2-3: Inspection; The automated robotic arm places the welded filter semi-finished product onto the automated testing platform, where the LCR meter and integrated tester perform fully automated inspection of the filter semi-finished product.

Images