A capacitor welding fixture

Abstract

This utility model discloses a capacitor welding fixture, relating to the field of capacitor processing technology, for clamping PCB boards and welding capacitors. The capacitor welding fixture includes: a support plate, a sliding seat, multiple clamping components, and a cooling component. The sliding seat is slidably mounted on the support plate, and multiple clamping stations are evenly arranged on the sliding seat. The multiple clamping components are mounted one-to-one on the multiple clamping stations for clamping the PCB boards one-to-one. The cooling component is disposed on the sliding seat. This utility model relates to the field of capacitor processing technology, and by applying the above technical solution, it effectively alleviates the problem of weld cracking and chip damage caused by the mismatch of thermal expansion coefficients between the ceramic body and the PCB board.

Description

Technical Field

[0001] This utility model relates to the field of capacitor processing technology, specifically to a capacitor welding fixture. Background Technology

[0002] As a core passive component in electronic circuits, capacitors are widely used in key areas such as power management, signal filtering, and energy storage. Their welding assembly is a fundamental process for achieving electrical connection and system integration. Especially in high-reliability scenarios such as automotive electronics, new energy equipment, and industrial control, welding quality directly determines the lifespan and safety performance of the entire device.

[0003] In existing capacitor soldering processes, the mismatch in thermal expansion coefficients between the capacitor ceramic body, PCB substrate, and metal terminals, coupled with the soldering thermal cycle and the brittle characteristics of lead-free solder, leads to the continuous accumulation of thermal stress in the solder joint area. This can easily cause solder cracking, internal delamination, or damage to the capacitor chip, ultimately resulting in electrical failure. This problem has become a common technical bottleneck restricting the reliability of high-density electronic assembly. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a capacitor welding fixture, which solves the existing technical problems.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a capacitor welding fixture for clamping a PCB board and for welding capacitors, the capacitor welding fixture comprising: a support plate, a sliding seat, multiple clamping components and a cooling component; The sliding seat is slidably mounted on the support plate, and multiple clamping stations are evenly arranged on the sliding seat; multiple clamping components are mounted one-to-one on the multiple clamping stations for clamping PCB boards one-to-one; the cooling component is disposed on the sliding seat. The cooling assembly includes an inlet and an outlet water connector disposed on the sliding seat, a coolant passage formed within the sliding seat and connecting the inlet and outlet water connectors, and flexible heat exchangers correspondingly disposed in the clamping station; wherein... Each of the clamping stations is equipped with a sub-inlet and a sub-outlet that are connected to the flexible heat exchanger. After being filled with water, the flexible heat exchanger bulges up to fit the corresponding PCB board and cool it down.

[0006] In some embodiments, the flexible heat exchanger is a rectangular plate of flexible material, and the flexible heat exchanger and the corresponding clamping station together enclose a heat exchange cavity, and the corresponding sub-inlet and sub-outlet are both connected to the heat exchange cavity.

[0007] In some embodiments, the coolant circuit includes an inlet pipe connecting each of the sub-inlets and an outlet pipe connecting each of the sub-outlets.

[0008] In some embodiments, the sliding seat is provided with a pressure relief pipe that communicates with the water inlet pipe and the water outlet pipe. The pressure relief pipe passes through one side wall of the sliding seat, and a pressure relief valve is provided on the sliding seat that flows through the pressure relief pipe.

[0009] In some embodiments, the cooling assembly further includes an inlet pump connected to the inlet connector and a control valve and pressure detector disposed on the outlet connector.

[0010] In some embodiments, the clamping assembly includes a plurality of positioning rods axially surrounding the clamping station, rotating members rotatably connected to the plurality of positioning rods in a one-to-one correspondence, a limiting groove formed on each positioning rod, and a buckle disposed on each of the rotating members and engaging with the limiting groove; wherein, When the rotating component rotates to the set position, the buckle engages with the limiting groove of the corresponding positioning rod, and the rotating component abuts against the side wall of the corresponding PCB board away from the clamping station.

[0011] In some embodiments, the clamping assembly further includes a plurality of guide pins evenly disposed on the outer periphery of the clamping station, wherein the plurality of guide pins are spaced apart from the plurality of positioning rods; wherein, Multiple guide pins are used to pass through guide holes at corresponding positions on the PCB board.

[0012] In some embodiments, the support plate has multiple support platforms on the side opposite to the clamping station.

[0013] Beneficial effects: This invention provides a capacitor welding fixture. It offers the following advantages: A flexible heat exchanger, after being filled with water, bulges and adheres to the corresponding PCB board for localized cooling. This allows the large amount of heat generated during welding to be rapidly dissipated, effectively reducing the accumulation of thermal stress in the solder joint area. This alleviates the problems of weld cracking and chip damage caused by the mismatch in thermal expansion coefficients between the ceramic body and the PCB board. Simultaneously, the sliding seat can sequentially move multiple clamping stations to the welding position, facilitating continuous operation and further improving welding efficiency and assembly convenience. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a capacitor welding fixture according to the present invention.

[0015] Figure 2This is a side sectional view of the capacitor welding fixture described in this utility model.

[0016] Figure 3 This is a partial three-dimensional structural diagram of a capacitor welding fixture according to the present invention.

[0017] Figure 4 This is a partial cross-sectional view of a capacitor welding fixture according to the present invention.

[0018] Figure 5 This is a front view structural schematic diagram of a capacitor welding fixture according to the present invention.

[0019] In the diagram: 1. Support plate; 2. Sliding seat; 3. Inlet connector; 4. Outlet connector; 5. Flexible heat exchanger; 6. Inlet pump; 7. Control valve; 8. Pressure detector; 9. Positioning rod; 10. Rotating component; 11. Buckle; 12. Guide pin; 13. Support platform; 14. Pressure relief valve; 15. Clamping station; 16. Coolant circuit; 161. Sub-inlet; 162. Sub-outlet; 163. Pressure relief pipeline. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 This utility model provides an embodiment: a capacitor welding fixture is provided in this application for clamping a PCB board and for welding capacitors. Specifically, the capacitor welding fixture includes a support plate 1, a sliding seat 2, multiple clamping components, and a cooling component.

[0022] Support plate 1 is the bottom support structure of the capacitor welding fixture, used to support the sliding seat 2 and provide an installation base for the entire fixture. For example, support plate 1 can be a rectangular flat plate structure made of metal material, with sufficient structural rigidity to support the weight of the sliding seat 2 and the PCB board to be processed.

[0023] The sliding base 2 is slidably mounted on the support plate 1. As a moving platform carrying multiple PCBs, the sliding base 2 can reciprocate along a predetermined direction on the support plate 1 to switch between different processing positions. For example, the sliding base 2 and the support plate 1 can be slidably engaged via a linear guide or a sliding slider structure, which helps ensure the linearity and smoothness of the sliding base 2's movement trajectory. By sliding the sliding base 2 relative to the support plate 1, the PCBs to be soldered can enter the soldering area sequentially, facilitating batch continuous operation and potentially improving production efficiency.

[0024] Multiple clamping stations 15 are evenly arranged on the sliding base 2. Each clamping station 15 is a predetermined area set on the surface of the sliding base 2, and each clamping station 15 is used to accommodate and position a PCB board to be soldered. The multiple clamping stations 15 are evenly arranged along the length or width direction of the sliding base 2, so that after each slide of the sliding base 2, the soldering head can be aligned with different clamping stations 15 for soldering operations.

[0025] Multiple clamping assemblies are assembled one-to-one on multiple clamping stations 15 for clamping PCB boards. Each clamping station 15 is provided with one clamping assembly, which is used to fix the PCB board in the corresponding clamping station 15 to prevent the PCB board from shifting during the soldering process. For example, the clamping assembly can adopt a pressure plate type, a snap-on type, or a claw type structure, which can press the edge or corner of the PCB board tightly against the surface of the clamping station 15.

[0026] A cooling assembly is mounted on the sliding seat 2. The cooling assembly is used to cool the PCB board during the soldering process to reduce the thermal impact of soldering heat on the PCB board and the soldered components. The cooling assembly includes a water inlet connector 3 and a water outlet connector 4 mounted on the sliding seat 2, a coolant passage 16 opened in the sliding seat 2 and connecting the water inlet connector 3 and the water outlet connector 4, and flexible heat exchangers 5 correspondingly mounted in the clamping station 15.

[0027] The water inlet connector 3 is disposed on the outer wall surface of the sliding seat 2 and is used to connect to the external coolant supply pipeline to introduce low-temperature coolant into the cooling assembly. The water outlet connector 4 is disposed on the outer wall surface of the sliding seat 2 and is used to discharge the coolant after it has absorbed heat and heated up from the cooling assembly. Exemplarily, the water inlet connector 3 and the water outlet connector 4 can be disposed on the same side wall surface of the sliding seat 2 or on different side wall surfaces to adapt to different external pipeline layout requirements.

[0028] The coolant passage 16 is located inside the sliding seat 2 and is a channel structure formed within the sliding seat 2. One end of the coolant passage 16 is connected to the inlet connector 3, and the other end is connected to the outlet connector 4. The coolant flows in the coolant passage 16, distributing the coolant to the flexible heat exchangers 5 at each clamping station 15, and collecting the cooled coolant after heat absorption before discharging it from the outlet connector 4. The coolant passage 16 can be formed by drilling inside the sliding seat 2 or by casting. Its arrangement must ensure that each clamping station 15 receives a uniform coolant flow.

[0029] Each clamping station 15 is equipped with a sub-inlet 161 and a sub-outlet 162 connected to the flexible heat exchanger 5. The sub-inlet 161 is an opening structure formed on the surface of the clamping station 15, which is connected to the coolant passage 16 and used to introduce coolant into the flexible heat exchanger 5. The sub-outlet 162 is another opening structure formed on the surface of the clamping station 15, which is connected to the coolant passage 16 and used to discharge the coolant after heat absorption in the flexible heat exchanger 5. Each clamping station 15 is equipped with an independent sub-inlet 161 and sub-outlet 162, so that each flexible heat exchanger 5 can receive an independent coolant supply.

[0030] The flexible heat exchanger 5, after being filled with water, bulges to adhere to the corresponding PCB board and provide cooling. The flexible heat exchanger 5 is a deformable, capsule-like structure, positioned within the clamping station 15, below or to the side of the PCB board. In its unfilled state, the flexible heat exchanger 5 is flat or relaxed, facilitating PCB board placement. When coolant is introduced into the flexible heat exchanger 5 through the sub-inlet 161, the internal pressure increases, causing it to expand and bulge upwards, allowing its upper surface to adhere to the bottom surface of the PCB board. Because the flexible heat exchanger 5 is filled with low-temperature coolant, heat from the PCB board can be transferred to the coolant via the flexible heat exchanger 5, and then carried away through circulation, thus achieving localized cooling of the PCB board. The bulging deformation of the flexible heat exchanger 5 allows it to adapt to slight thickness differences and surface unevenness of different PCB boards, helping to improve the heat exchange area and the uniformity of the cooling effect.

[0031] According to the above technical solution, the flexible heat exchanger 5 is used to bulge and fit against the corresponding PCB board after being filled with water for local cooling. This allows a large amount of heat generated during the welding process to be quickly carried away, effectively reducing the accumulation of thermal stress in the solder joint area. This alleviates the problems of weld cracking and chip damage caused by the mismatch of thermal expansion coefficients between the ceramic body and the PCB board. At the same time, the sliding seat 2 can drive multiple clamping stations 15 to move sequentially to the welding position, which facilitates continuous operation and further improves welding efficiency and assembly convenience.

[0032] In some possible embodiments of this application, the flexible heat exchanger 5 is a rectangular plate of flexible material, and the flexible heat exchanger 5 and the corresponding clamping station 15 together enclose a heat exchange cavity. For example, the flexible heat exchanger 5 can be made of a flexible material with good thermal conductivity, such as silicone, rubber, or thermally conductive soft rubber. The edge of the flexible heat exchanger 5 is sealed to the edge of the clamping station 15, forming a closed heat exchange cavity between the flexible heat exchanger 5 and the surface of the clamping station 15. The corresponding sub-inlet 161 and sub-outlet 162 are both connected to the heat exchange cavity. Coolant enters the heat exchange cavity through the sub-inlet 161, causing the flexible heat exchanger 5 to bulge and adhere to the PCB board. The cooled liquid, after absorbing heat, flows out through the sub-outlet 162.

[0033] In some possible embodiments of this application, the coolant path 16 includes an inlet pipe connecting each sub-inlet 161 and an outlet pipe connecting each sub-outlet 162. The inlet pipe is a branch channel in the coolant path 16 used for distributing coolant; its inlet end is connected to the inlet connector 3, and its outlet end is connected to the sub-inlet 161 of each clamping station 15. The outlet pipe is a branch channel in the coolant path 16 used for collecting coolant; its inlet end is connected to the sub-outlet 162 of each clamping station 15, and its outlet end is connected to the outlet connector 4. Through the branched arrangement of the inlet and outlet pipes, parallel flow of coolant can be achieved between each clamping station 15, which helps ensure that each flexible heat exchanger 5 obtains similar coolant temperature and flow rate.

[0034] In some possible embodiments of this application, the sliding seat 2 is provided with a pressure relief pipe 163 communicating with the inlet and outlet water pipes. The pressure relief pipe 163 penetrates one side wall of the sliding seat 2, and a pressure relief valve 14 is provided on the sliding seat 2 communicating with the pressure relief pipe 163. The pressure relief pipe 163 is a channel branching from the inlet or outlet water pipe, used to discharge part of the coolant when the pressure in the coolant circuit 16 is too high, thereby reducing the system pressure. The pressure relief valve 14 is installed at the outlet of the pressure relief pipe 163, and it can automatically open or close according to a preset pressure value. When the pressure in the coolant circuit 16 exceeds the set value, the pressure relief valve 14 opens, and part of the coolant is discharged through the pressure relief pipe 163, which helps prevent the coolant circuit 16 from being damaged due to excessive pressure and may improve the operational safety of the cooling components.

[0035] In some possible embodiments of this application, the cooling assembly further includes an inlet pump 6 connected to the inlet connector 3 and a control valve 7 and a pressure detector 8 disposed on the outlet connector 4. The inlet pump 6 provides power to the coolant path 16, pumping coolant from the external storage container into the inlet connector 3. The control valve 7, disposed on the outlet connector 4, regulates the coolant flow rate, thereby controlling the coolant flow velocity and heat exchange efficiency within the flexible heat exchanger 5. The pressure detector 8, disposed on the outlet connector 4, monitors the pressure of the coolant path 16 in real time, allowing operators or the control system to adjust the operating status of the inlet pump 6 or the control valve 7 based on pressure feedback. The cooperation of these components helps to achieve precise control of the coolant flow rate and pressure.

[0036] In some possible embodiments of this application, the clamping assembly includes a plurality of positioning rods 9 axially surrounding the clamping station 15, rotating members 10 rotatably connected to the plurality of positioning rods 9 in a corresponding manner, limiting grooves formed on each positioning rod 9, and snap fasteners 11 provided on each rotating member 10 and engaging with the limiting grooves. The positioning rods 9 are columnar structures extending from the outer periphery of the clamping station 15 in a direction perpendicular to the surface of the sliding seat 2, and the plurality of positioning rods 9 are arranged circumferentially around the clamping station 15. The rotating members 10 are rotatably connected to the positioning rods 9 and can swing relative to the positioning rods 9 within a preset angle range. The limiting grooves are groove structures formed on the outer wall surface of the positioning rods 9 for engaging with the snap fasteners 11. The snap fasteners 11 are provided on the side wall surface of the rotating member 10 facing the positioning rods 9. When the rotating member 10 rotates to a set position, the snap fasteners 11 engage with the limiting grooves of the corresponding positioning rods 9, and the rotating member 10 abuts against the side wall surface of the corresponding PCB board facing away from the clamping station 15. The PCB board is reliably fixed in the clamping station 15 by pressing the top surface of the PCB board with the rotating part 10.

[0037] In some possible embodiments of this application, the clamping assembly further includes a plurality of guide pins 12 evenly disposed on the outer periphery of the clamping station 15, with the guide pins 12 spaced apart from the plurality of positioning rods 9. The guide pins 12 are columnar structures protruding from the surface of the clamping station 15, and their positions correspond to the pre-set guide holes on the PCB board. The plurality of guide pins 12 are used to pass through the guide holes at corresponding positions on the PCB board. Through the cooperation of the guide pins 12 and the guide holes, the PCB board is precisely positioned within the clamping station 15, helping to ensure the accurate installation position of the PCB board.

[0038] In some possible embodiments of this application, a plurality of support platforms 13 are provided on the side of the support plate 1 facing away from the clamping station 15. Each support platform 13 is a support structure protruding downwards from the bottom surface of the support plate 1. The plurality of support platforms 13 are spaced apart on the bottom surface of the support plate 1 to support the support plate 1 on a workbench or mounting base. The arrangement of the support platforms 13 allows for a certain gap between the support plate 1 and the workbench, facilitating pipe connections or electrical wiring by operators from below the support plate 1.

[0039] This application enables the batch clamping and sequential processing of multiple PCB boards by slidably mounting the sliding seat 2 onto the support plate 1 and evenly arranging multiple clamping stations 15 on the sliding seat 2, which may improve production efficiency. By setting flexible heat exchangers 5 within each clamping station 15 and inflating them to fit the PCB board after filling with water, the circulating coolant can effectively remove the heat generated during welding, helping to reduce the thermal impact of welding heat on the PCB board and welded components, potentially improving welding quality and product yield. The separate design of the inlet and outlet water pipes, the safety protection of the pressure relief pipe 163 and pressure relief valve 14, and the flow regulation of the inlet pump 6 and control valve 7 help improve the operational reliability of the cooling components and the controllability of the cooling effect. The cooperation of the positioning rod 9, rotating part 10, and guide pin 12 enables rapid positioning and reliable clamping of the PCB board, helping to improve clamping efficiency and positioning accuracy.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A capacitor welding fixture for clamping a PCB board and for welding capacitors, characterized in that, The capacitor welding fixture includes: a support plate, a sliding seat, multiple clamping components, and a cooling component; The sliding seat is slidably mounted on the support plate, and multiple clamping stations are evenly arranged on the sliding seat; multiple clamping components are mounted one-to-one on the multiple clamping stations for clamping PCB boards one-to-one; the cooling component is disposed on the sliding seat. The cooling assembly includes an inlet and an outlet water connector disposed on the sliding seat, a coolant passage formed within the sliding seat and connecting the inlet and outlet water connectors, and flexible heat exchangers correspondingly disposed in the clamping station; wherein... Each of the clamping stations is equipped with a sub-inlet and a sub-outlet that are connected to the flexible heat exchanger. After being filled with water, the flexible heat exchanger bulges up to fit the corresponding PCB board and cool it down.

2. The capacitor welding fixture according to claim 1, characterized in that, The flexible heat exchanger is a rectangular plate made of flexible material, and the flexible heat exchanger and the corresponding clamping station together enclose a heat exchange cavity. The corresponding sub-inlet and sub-outlet are both connected to the heat exchange cavity.

3. The capacitor welding fixture according to claim 2, characterized in that, The coolant circuit includes an inlet pipe connecting each of the sub-inlets and an outlet pipe connecting each of the sub-outlets.

4. The capacitor welding fixture according to claim 3, characterized in that, The sliding seat is provided with a pressure relief pipe that is connected to the water inlet pipe and the water outlet pipe. The pressure relief pipe passes through one side wall of the sliding seat, and a pressure relief valve is provided on the sliding seat that flows through the pressure relief pipe.

5. A capacitor welding fixture according to claim 1, characterized in that, The cooling assembly also includes an inlet pump connected to the inlet connector and a control valve and pressure detector disposed on the outlet connector.

6. A capacitor welding fixture according to any one of claims 1-5, characterized in that, The clamping assembly includes multiple positioning rods axially surrounding the clamping station, rotating components rotatably connected to the multiple positioning rods in a corresponding manner, limiting grooves formed on each positioning rod, and snap fasteners provided on each rotating component and engaging with the limiting grooves; wherein... When the rotating component rotates to the set position, the buckle engages with the limiting groove of the corresponding positioning rod, and the rotating component abuts against the side wall of the corresponding PCB board away from the clamping station.

7. A capacitor welding fixture according to claim 6, characterized in that, The clamping assembly further includes a plurality of guide pins evenly distributed around the outer periphery of the clamping station, wherein the plurality of guide pins are spaced apart from the plurality of positioning rods; wherein... Multiple guide pins are used to pass through guide holes at corresponding positions on the PCB board.

8. A capacitor welding fixture according to claim 6, characterized in that, The support plate has multiple support platforms on the side opposite to the clamping station.

Images