Intelligent crimping device and method for PCB connecting device

Abstract

This application discloses an intelligent crimping device and method for PCB board connection devices, belonging to the field of electronic product assembly. It includes a control component, an upper template, and a lower template. The upper template is equipped with a crimping component, including: a mounting base block with a first mounting groove; a main pressing block, one end of which is located in the first mounting groove, and the other end face is a main pressing surface with a second mounting groove; a pre-pressing block, one end of which is movably located in the second mounting groove with an elastic element between them, and the other end extending out of the second mounting groove as a pre-pressing surface; a pressure adjusting component, including a first adjusting component for adjusting the relative height between the main pressing surface and the mounting base block, and a second adjusting component for adjusting the relative height between the pre-pressing surface and the main pressing surface; and a lifting mechanism for lifting the device upwards before being pressed. The proposed solution employs a lifting-pre-pressing-deep-pressing method to ensure that the state of each terminal inserted into the PCB through-hole remains consistent, improving the reliability and stability of the connection between the device and the circuit board.

Description

Technical Field

[0001] This application belongs to the field of electronic product assembly and relates to an intelligent crimping device and method for PCB board connection devices. Background Technology

[0002] A press-fit terminal is a solderless connection solution that achieves electrical contact through cold pressing technology. For example... Figure 1 As shown, its core is a flexible terminal structure (resembling a fisheye), which, after being pressed into a PCB through-hole, forms a tight electromechanical connection through elastic deformation. Currently, Press-Fit technology, with its three major advantages of being solderless, highly reliable, and low-cost, has become the preferred connection solution in automotive electronics, energy equipment, and industrial control. Its flexible press-fit design balances production efficiency and long-term stability, driving innovation in electromechanical connections for high-density, high-current scenarios.

[0003] In actual production, connectors with fisheye terminals are placed on a PCB board, with the terminals corresponding to the PCB through-holes. A crimping device then pushes the connector downwards to insert the terminals into the through-holes, thus completing the connection between the connector and the circuit, without the need for solder or flux. While this crimping process is simple and convenient, in practice, it has been found that product yield is difficult to further improve. This is mainly due to differences in conductivity among the terminals of the connectors, and the tendency for some connectors to loosen and detach in vibrating environments.

[0004] Analysis revealed that the main cause of the above problems was the inconsistent placement of connecting components, especially long, strip-shaped ones, on the PCB board before crimping. For example, different production line workers placed similar components at varying angles between the component terminals and the PCB vias. Figure 2 As shown, during crimping, if the tilt angle of the device terminals (i.e., fisheye terminals) is too large, it will not only affect the reliability of the connection between the terminals and the PCB vias, but may also cause the terminals to bend or even break in severe cases. These issues directly reduce product yield, especially the quality of precision electronic products.

[0005] The key to improving the connection quality and reliability between the connector and the circuit board is to accurately and reliably insert the connector with fisheye terminals into the PCB through-hole. Summary of the Invention

[0006] To address the challenge of improving the connection quality and reliability between connectors with fisheye terminals and circuit boards in practical applications, this application aims to provide an intelligent crimping device for PCB connectors. This device employs a lift-pre-press-deep-press method to ensure consistent insertion of each terminal into the PCB through-hole, significantly enhancing the reliability and stability of the connection between the device and the circuit board. Based on this intelligent crimping device, this application also provides an intelligent crimping method for PCB connectors. This method utilizes precise position control technology to maintain a constant relative position between the terminals on the connector and the PCB through-hole during crimping. Furthermore, the crimping parameters can be adjusted in real-time based on subsequent connection quality testing results, ensuring the connection quality between the connector and the circuit board. The specific solution is as follows: An intelligent crimping device for PCB board connectors includes an upper template, a lower template, a driving component for relative movement of the upper and lower templates, and a control component. The lower template is provided with at least one retaining member for placing the device to be pressed and the circuit board; At least one set of pressing components is provided on the upper template corresponding to the retaining member; The crimping assembly includes: The mounting base block is detachably connected to the upper template, and a first mounting groove is provided on the side facing the lower template. The main pressure block has one end near the upper template set in the first mounting groove, and the end face away from the upper template is configured as the main pressure surface. The shape and size of the main pressure surface are adapted to the shape and size of the top surface of the device to be pressed, and a second mounting groove is opened in the middle of the main pressure surface along its height direction. The pre-compression block has one end near the main compression block that is movably disposed in the second mounting groove and an elastic element is provided between it and the second mounting groove; the end face away from the main compression block extends out of the second mounting groove and is configured as a pre-compression surface. The pressure regulating component includes a first pressure regulating component disposed between the mounting base block and the main pressure block for adjusting the relative height between the main pressure surface and the mounting base block, and a second pressure regulating component disposed between the main pressure block and the pre-pressure block for adjusting the relative height between the pre-pressure surface and the main pressure surface; The lifting mechanism is configured to lift the device to be crimped upwards before it is subjected to pressure. The driving component, pressure regulating component, and lifting mechanism are all connected to the control component. In the initial state, the height of the pre-compression surface is lower than the height of the main compression surface; in the pushing state, the height of the pre-compression surface is flush with the main compression surface. The control component controls the drive component to drive the upper template to press down or the lower template to move up. When the distance between the main pressing surface and the device is less than the set value, the control component controls the lifting mechanism to lift the device to be pressed up. When the distance between the upper template and the lower template reaches the set value, the control component controls the upper template or the lower template to return to the initial position.

[0007] The above technical solution involves first lifting the connector with fisheye terminals placed on a PCB board and fine-tuning its placement. Then, a pre-pressing block pre-presses the center of the connector to further correct the relative position between the terminals and the PCB vias. Finally, the main pressing block presses down further, allowing the fisheye terminals to penetrate the PCB vias, thus completing the connection between the connector and the circuit board. This pre-adjustment and pre-pressing process improves connection quality and reliability, increasing product yield without affecting production efficiency.

[0008] Furthermore, both the first mounting slot and the second mounting slot are configured as T-shaped slots; The main pressure block is T-shaped at one end near the upper template and is arranged to slide up and down with the first mounting groove; The pre-compression block is T-shaped at one end near the main compression block and is arranged to slide up and down with the second mounting groove; The first pressure regulating component includes a first thermal expansion pad layer disposed between the upper end face of the main pressure block and the top surface of the first mounting groove; The second pressure regulating component includes a second thermal expansion pad layer disposed between the upper end face of the pre-compression block and the top surface of the second mounting groove; The main pressing block is provided with a first heating element near the first thermal expansion pad layer, and the pre-pressing block is provided with a second heating element near the second thermal expansion pad layer. Both the first heating element and the second heating element are connected to the control component and adjust their own heating temperature in response to the control command of the control component.

[0009] Through the above technical solution, the pressing distance of the main pressure block can be finely adjusted by controlling the temperature of the first heating element. This allows for adjustment of the distance the device to be pressed is pushed down within a small range, thereby changing the insertion state between the fisheye terminal and the PCB through hole. By controlling the temperature of the second heating element, the pressing distance of the pre-pressure block can be finely adjusted. This allows for adjustment of the timing of the pre-pressure block pre-pressing the device, achieving precise adjustment of the relative position between the device terminal and the PCB board, and ensuring the connection quality and reliability between the connected device and the circuit board.

[0010] Furthermore, both the first thermal expansion pad and the second thermal expansion pad are configured as silicone pads, and a first temperature sensor and a second temperature sensor are respectively provided in the first thermal expansion pad and the second thermal expansion pad. The first heating element and the second heating element are respectively configured as a first electric heating plate and a second electric heating plate installed on the top surface of the first mounting groove and the top surface of the second mounting groove. The first electric heating plate and the second electric heating plate are both electrically connected to an external power supply device and controlled by the control component. The control component receives the temperature detection signal from the first temperature sensor and the second temperature sensor, generates and outputs a control signal to control the temperature of the first electric heating plate and the second electric heating plate.

[0011] Through the above technical solution, the silicone pad layer can not only buffer the pushing action of the main pressure block and the pre-pressure block, but also sensitively respond to the temperature change of the heating plate to change its own volume, that is, change the relative height of the main pressure block or the pre-pressure block, which helps to accurately adjust the pressure parameters of the device and improve the connection quality between the connecting device and the circuit board.

[0012] Furthermore, the first mounting groove penetrates the two opposite sidewalls of the mounting base block, and the main pressure block is slidably disposed along the length direction of the first mounting groove; A limiting member is provided between the mounting base block and the main pressure block to restrict the main pressure block from sliding along the length direction of the first mounting groove.

[0013] The above technical solution allows for flexible replacement of the required main pressure block type, enabling the crimping device to meet the crimping needs of different types of devices.

[0014] Furthermore, the first heating element includes multiple sub-heating plates arranged along the length of the first mounting groove and independently controlled, and each sub-heating plate is controlled and connected to the control component.

[0015] The above technical solution allows for fine adjustment of the tilt angle of the main pressing surface, which facilitates adjustment of the pressure exerted on the device terminals during crimping.

[0016] Furthermore, an airflow channel is provided inside the main pressure block, and the airflow channel forms at least two negative pressure air holes on the main pressure surface; The lifting mechanism includes a negative pressure device connected to the airflow channel via a negative pressure hose, and a distance sensor for detecting the distance between the upper template and the lower template. The negative pressure hose is equipped with a solenoid valve to control the amount of airflow. The control component is signal-connected to the ranging sensor and control-connected to the solenoid valve. It receives and responds to the ranging signal from the ranging sensor, and controls the airflow of the solenoid valve and / or the negative pressure value of the negative pressure device.

[0017] Through the above technical solution, when the main pressure block approaches the connecting device to prepare for pressing, the control component controls the solenoid valve to open, and the device is subjected to an upward adsorption force, thus making a slight adjustment in its posture. Then, under the action of the pre-pressure block, it is initially positioned, which can significantly reduce the tilt of the device terminal before crimping, ensure the accurate position between the fisheye terminal and the PCB through hole, and improve the connection quality. Furthermore, by setting the above-mentioned negative pressure air hole, after the device is crimped, if the crimping quality is not good, the fisheye terminal will detach from the circuit board along with the device under the action of negative pressure adsorption force. In the subsequent quality inspection process, the circuit board with crimping quality problems can be quickly identified, and the initial inspection of crimping quality is completed at the same time as the crimping is completed.

[0018] Furthermore, the lifting mechanism includes a magnet disposed on the main pressure block.

[0019] With the above technical solution, when the connecting device itself has magnetic material, the connecting device can be lifted just before it is pressed by the magnet, thereby fine-tuning its placement posture.

[0020] Furthermore, the side wall of the mounting base is provided with at least one limiting screw hole, and the side wall of the main pressure block is provided with multiple limiting grooves vertically along its length. The limiting member includes at least one limiting screw that passes through the limiting screw hole and abuts against the limiting groove.

[0021] With the above technical solution, after the main pressure block is installed in the first mounting groove, the cooperation between the limiting screw and the limiting groove can prevent the main pressure block from sliding along the length direction of the first mounting groove, but it does not affect the vertical movement of the main pressure block, thus ensuring the accuracy of the pressing.

[0022] Furthermore, the upper and lower templates are rectangular and each corner is provided with a guide rod; The driving component includes a cylinder module or a linear ball screw module that is controlled and connected to the control assembly; wherein: The cylinder module is located below the lower template, and its telescopic end is fixedly connected to the lower template, pushing the lower template to reciprocate in the vertical direction; A linear ball screw module includes a fixed base, a servo motor, a guide rail, and a slider. The upper template is fixedly connected to the slider, and the fixed base is fixedly connected to the lower template. The upper template is driven to reciprocate up and down via the servo motor.

[0023] The above technical solution enables precise adjustment of the relative distance between the upper and lower templates, which helps improve the crimping accuracy.

[0024] Furthermore, the control component includes: A control program storage unit is configured to store the control program for executing each crimping step; The signal acquisition unit is configured to acquire and preprocess the spacing detection signal between the upper and lower templates, the temperature detection signals of the first and second heating elements, the airflow of the solenoid valve, and the negative pressure value signal of the negative pressure device. The signal processing unit is configured to generate control command signals based on the control program according to the spacing detection signal, temperature detection signal, and negative pressure value signal. The signal output unit is configured to receive the control command signal and output it to the corresponding action execution terminal. The control program includes control logic and crimping parameters; The action execution terminal includes a driving component, a solenoid valve, a power supply device corresponding to the first electric heating plate and the second electric heating plate, and a negative pressure device.

[0025] The above technical solution allows for precise control of the entire device's operation process based on the set control program and the real-time operating status of each component, ensuring connection quality and reliability.

[0026] Furthermore, the control component also includes: The quality inspection data acquisition unit is configured to receive and store quality inspection data for subsequent quality inspection processes; The data association unit is configured to number each device and associate and store the crimping parameters corresponding to each number with the quality inspection data; The parameter optimization unit includes a machine learning model configured to receive the quality inspection data and the crimping parameter data, and obtain the crimping parameter data corresponding to the target quality inspection data through a built-in optimization algorithm. The control optimization unit is configured to optimize and update the control program based on the crimping parameter data; The quality inspection data includes contact resistance and / or holding force data between the fisheye terminal and the PCB through-hole; The pressing parameters include the spacing between the upper and lower templates, the temperatures of the first and second electric heating plates, the airflow of the solenoid valve, and the negative pressure value of the negative pressure device.

[0027] The above technical solution allows for continuous adjustment of crimping parameters based on quality inspection data from subsequent quality control processes, thereby ensuring stable crimping quality.

[0028] A method for intelligent crimping of PCB board connectors, based on the aforementioned intelligent crimping device for PCB board connectors, includes: Place the device to be crimped on the circuit board, align the device terminals with the PCB through holes to complete the crimping preparation; The assembly of the device and the circuit board is placed on the lower template and the circuit board is fixed by the retaining member; The first and second heating elements are adjusted to the preset temperature according to the initial settings of the control program; The upper template moves down or the lower template moves up by driving the driving component, so that the main pressure block is close to the surface of the device to be pressed; During the downward or upward movement of the upper template, the distance between the upper and lower templates is monitored in real time. If the distance between them is reduced to the first set value, the solenoid valve is controlled to open the negative pressure hose and maintain the first airflow. Reduce or maintain the current drive speed of the drive component and continue to move the upper template down or the lower template up; After the pre-pressing block contacts the upper surface of the device to achieve pre-pressing, the upper template continues to move down or the lower template moves up to make the main pressing surface contact the upper surface of the device. Continue to move the upper template down or the lower template up. When the distance between the two is reduced to the second set value, stop the current driving action of the drive component and start reverse driving. Control the solenoid valve to make the negative pressure hose maintain the second airflow. During the reverse drive process of the drive component, when the distance between the upper and lower templates reaches the third set value, the control solenoid valve shuts off the negative pressure hose. The driving component drives the upper or lower template to move continuously back to the initial position; The intelligent crimping method further includes a crimping parameter optimization step, comprising: Acquire and store quality inspection data for subsequent quality inspection processes; Each component is numbered, and the crimping parameters corresponding to each number are associated with and stored with the quality inspection data; Based on a machine learning model, and according to the quality inspection data and crimping parameter data, the crimping parameter data corresponding to the target quality inspection data is obtained through a built-in optimization algorithm. The control program is optimized and updated based on the crimping parameter data; The quality inspection data includes contact resistance and / or holding force data between the fisheye terminal and the PCB through-hole; The pressing parameters include the spacing between the upper and lower templates, the temperatures of the first and second electric heating plates, the airflow of the solenoid valve at each stage of pressing, and the negative pressure value of the negative pressure device.

[0029] This application includes at least one of the following beneficial effects: (1) When crimping a device with fisheye terminals to a circuit board, the device is first lifted before crimping to fine-tune its placement posture, avoiding excessive tilt angle between the device terminals and PCB vias. Then, pre-pressing is used to initially position the device terminals and PCB vias, further adjusting the relative position between the device terminals and PCB vias to make the placement posture more conducive to crimping. Finally, the main pressure block is used to push the entire device to complete the crimping action between the device and the circuit board. The above crimping process differs from the existing technology of directly pressing down the device. Instead, the device placement posture is finely adjusted multiple times before crimping to fix and unify the relative positions of each terminal and PCB via, significantly improving the connection quality and reliability between the device and the circuit board. (2) By setting the first thermal expansion pad and the second thermal expansion pad, the pressing distance between the main pressing block and the pre-pressing block can be finely adjusted, thereby finely adjusting the placement posture of the device when it is pressed. Combined with subsequent quality inspection data, the pressing parameters can be continuously optimized so that the pressing quality remains stable. Attached Figure Description

[0030] Figure 1 This is a schematic diagram showing the connection between the fisheye terminal and the PCB through-hole. Figure 2 A schematic diagram of a connector with fisheye terminals; Figure 3 This is a schematic diagram of the crimping device of this application; Figure 4 for Figure 3 A magnified view of part A in the middle; Figure 5 This is a schematic diagram showing the connection of the functional units of the control component in this application.

[0031] Reference numerals: 1. Fisheye terminal; 2. PCB through hole; 3. Circuit board; 4. Connecting device; 5. Upper template; 6. Lower template; 7. Driving component; 8. Guide rod; 9. Mounting base; 10. Buffer spring; 11. Fixing frame; 12. Placement slot; 13. Mounting block; 14. Mounting base block; 15. Main pressure block; 16. Main pressure surface; 17. Limiting screw; 18. Elastic component; 19. Pre-pressure block; 20. Pre-pressure surface; 21. First thermal expansion pad layer; 22. Second thermal expansion pad; 23. First electric heating plate; 24. Second electric heating plate; 25. Airflow channel; 26. Negative pressure vent; 27. Negative pressure hose; 28. Linear bearing; 100. Control program storage unit; 200. Signal acquisition unit; 300. Signal processing unit; 400. Signal output unit; 500. Quality inspection data acquisition unit; 600. Data association unit; 700. Parameter optimization unit; 800. Control optimization unit. Detailed Implementation

[0032] The embodiments of this application are described in detail below, and examples of the embodiments are shown in the accompanying drawings.

[0033] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] A smart crimping device for PCB board connectors 4 is mainly used to crimp connectors 4 with fisheye terminals 1 (such as... Figure 2 As shown), the automotive connector is crimped onto circuit board 3 to achieve a stable connection between the aforementioned connecting device 4 and circuit board 3. Combined with... Figure 1 and Figure 3 As shown ( Figure 3 (For clarity, the dashed area is shown in cross-section). The intelligent pressing device mainly includes a control component, an upper template 5 and a lower template 6 arranged in a rectangle, and a driving component 7 that drives the upper template 5 and the lower template 6 to move relative to each other to change the distance between them.

[0035] To ensure the stability of the upper template 5 and lower template 6 during relative movement, guide rods 8 are provided at each of the four corners of both templates. In this embodiment, the upper template 5 is fixed, while the lower template 6 is movable. A linear bearing 28 is provided between the guide rods 8 and the lower template 6 to reduce the resistance experienced by the lower template 6 during vertical movement. In practical applications, the lower template 6 can also be fixed, while the upper template 5 can be set to a state where it can move vertically. Figure 3 As shown, the entire crimping device is fixedly installed on the mounting base 9, and a buffer spring 10 is provided between the lower template 6 and the mounting base 9.

[0036] The drive unit 7 includes a cylinder module or a linear ball screw module that is controlled and connected to the control component.

[0037] In one embodiment, the driving component 7 is configured as a cylinder module. Preferably, the lower template 6 is set to a movable state, the cylinder is set below the lower template 6, the cylinder body is fixedly set on the mounting base 9, the telescopic end is fixedly connected to the lower template 6, and the lower template 6 is pushed to reciprocate in the vertical direction by the control component.

[0038] In another embodiment, the drive component 7 is configured as a linear ball screw module, and preferably the upper template 5 is configured to be movable. The linear ball screw module specifically includes a fixed base, a servo motor, a guide rail, and a slider. The fixed base is fixedly mounted on the mounting base 9 or the lower template 6, and the upper template 5 is bolted to the slider on the guide rail, and is driven by the servo motor to reciprocate up and down. Preferably, two linear ball screw modules are configured, located on opposite sides of the upper template 5.

[0039] In practical applications, different types of drive components 7 can be used depending on the working conditions. For example, in assembly line production mode, a cylinder module is preferred as the drive component 7. Both configurations of the drive components 7 mentioned above can achieve precise adjustment of the relative distance between the upper template 5 and the lower template 6, which is beneficial to improving the crimping accuracy between the device and the circuit board 3.

[0040] like Figure 3 As shown, the lower template 6 is provided with at least one retaining member for placing the device to be pressed and the circuit board 3, and the upper template 5 is provided with at least one set of pressing components corresponding to the retaining member. In this embodiment of the application, for the sake of simplicity, the above-mentioned retaining member and pressing components are both set as one set. In actual applications, multiple sets can be configured as needed. For example, when multiple devices need to be pressed at the same time, the pressing components and retaining members can be configured as multiple sets to improve production efficiency.

[0041] Combination Figure 3 As shown, the aforementioned retaining member includes a placement groove 12 for fixing the circuit board 3. The placement groove 12 is formed by a fixing frame 11 detachably mounted on the lower template 6 and the end face of the lower template 6. The fixing frame 11 is fixedly connected to the lower template 6 by bolts, and the edge of the fixing frame 11 is provided with an opening to facilitate the worker to remove the circuit board 3 from the placement groove 12. In practical applications, the aforementioned retaining member can be configured on a transmission belt. The transmission belt moves close to the surface of the lower template 6, conveying the assembly of the device to be crimped and the circuit board 3 to the bottom of the crimping assembly.

[0042] In the embodiments of this application, combined with Figure 4 As shown, the crimping assembly includes a mounting base block 14, a main pressure block 15, a pre-pressure block 19, a pressure regulating component, and a lifting mechanism.

[0043] The mounting base 14 is detachably connected directly or indirectly to the upper template 5, and a first mounting groove is provided on the side facing the lower template 6. Figure 4As shown, in one embodiment, two L-shaped mounting blocks 13 are welded or bolted onto the upper template 5, and the two mounting blocks 13 are arranged facing each other to form a fixed mounting groove. The mounting base block 14 is T-shaped and is disposed in the fixed mounting groove. The mounting base block 14 and the fixed mounting groove are fixedly connected by bolts, and the bottom surface of the mounting base block 14 is flush with the bottom surface of the mounting block 13. The first mounting groove is a T-shaped groove and is opened in the vertical direction.

[0044] The main pressure block 15 is T-shaped at one end near the upper template 5 and is positioned in the first mounting groove. The end face away from the upper template 5 is configured as the main pressure surface 16. The shape and size of the main pressure surface 16 are adapted to the shape and size of the top surface of the device to be pressed. For example, if the top surface of the device to be pressed is rectangular, then the main pressure surface 16 is also rectangular. Furthermore, to prevent the terminals from bending during the crimping process, slots with shapes and sizes adapted to the terminals can be configured on the main pressure surface 16. A second mounting groove is formed in the middle of the main pressure surface 16 along its height direction. The second mounting groove is also a T-shaped groove.

[0045] In this embodiment, the first mounting groove penetrates the two opposite sidewalls of the mounting base 14, and the main pressure block 15 is slidably disposed along the length direction of the first mounting groove. A limiting member is provided between the mounting base 14 and the main pressure block 15 to restrict the sliding of the main pressure block 15 along the length direction of the first mounting groove. Specifically, at least one limiting screw hole is provided through the sidewall of the mounting base 14, and multiple limiting grooves are provided vertically along the length direction of the sidewall of the main pressure block 15. The limiting member includes at least one limiting screw 17 that passes through the limiting screw hole and abuts against the limiting groove. When the main pressure block 15 is installed in the first mounting groove, the cooperation between the limiting screw 17 and the limiting groove can prevent the main pressure block 15 from sliding along the length direction of the first mounting groove without affecting the vertical movement of the main pressure block 15, thus ensuring the accuracy of the pressing.

[0046] The pre-pressure block 19, with one end near the main pressure block 15 in a T-shape, is movably positioned in the second mounting groove. An elastic element 18 is positioned between the top of the pre-pressure block 19 and the second mounting groove. The end face of the pre-pressure block 19 furthest from the main pressure block 15 extends out of the second mounting groove and is configured as a pre-pressure surface 20. In this embodiment, the elastic element 18 is preferably configured as a spring or an elastic rubber block. Initially, the height of the pre-pressure surface 20 is lower than the height of the main pressure surface 16, meaning the lower end face of the pre-pressure block 19 extends outside the second mounting groove. In the pushing state, the pre-pressure surface 20 contacts the top surface of the device. Under the action of a reverse thrust, the pre-pressure block 19 retracts into the second mounting groove. During pressing, the height of the pre-pressure surface 20 is flush with the main pressure surface 16. Depending on the device type, the initial distance between the pre-pressure surface 20 and the main pressure surface 16 is 0.3-2.0 mm. Figure 4(For clarity, the distance between the pre-pressure surface 20 and the main pressure surface 16 has been enlarged). In practice, to avoid the pre-pressure surface 20 directly contacting the device terminal, i.e., the top of the fisheye terminal 1, the shape and size of the pre-pressure block 19 meet the requirement of abutting against the edge of the device.

[0047] Based on the above-mentioned structural arrangement of mounting base 14, main pressure block 15 and pre-pressure block 19, the types of main pressure block 15 and pre-pressure block 19 can be flexibly disassembled and adjusted according to different device types, so that the crimping device can be flexibly adapted to different device crimping requirements.

[0048] In practical applications, different initial placement postures of the connecting device 4, changes in the height of the retaining member on the conveyor belt, or slight deformation of the circuit board 3 itself under pressure can all affect the connection quality between the device terminals and the PCB through-hole 2. Practical applications have also revealed that the numerical distribution of these influencing factors is not random but rather follows a pattern. For example, the deformation of the circuit board 3 during crimping is closely related to its own parameters, and the deformation of circuit boards 3 in the same batch is very similar. Similarly, the up-and-down movement of the conveyor belt during operation also exhibits periodic fluctuations, and the initial placement posture of the device is usually determined by the worker's habits in the previous crimping process, also showing a pattern. Therefore, in this embodiment, a pressure adjusting component and a lifting mechanism connected to the control component are provided to fine-tune the placement posture of the device before crimping according to the relative positional relationship between the device terminals and the PCB through-hole 2.

[0049] In detail, the pressure regulating component includes a first pressure regulating component disposed between the mounting base 14 and the main pressure block 15 for adjusting the relative height between the main pressure surface 16 and the mounting base 14, and a second pressure regulating component disposed between the main pressure block 15 and the pre-pressure block 19 for adjusting the relative height between the pre-pressure surface 20 and the main pressure surface 16.

[0050] In this embodiment, the first pressure regulating component includes a first thermal expansion pad 21 disposed between the upper end face of the main pressure block 15 and the top surface of the first mounting groove, and the second pressure regulating component includes a second thermal expansion pad 22 disposed between the upper end face of the pre-pressure block 19 and the top surface of the second mounting groove. Both the first thermal expansion pad 21 and the second thermal expansion pad 22 are configured as silicone pads. The silicone pads can not only buffer the pushing action of the main pressure block 15 and the pre-pressure block 19, but also sensitively respond to the temperature change of the heating plate to change their own volume, that is, change the relative height of the main pressure block 15 or the pre-pressure block 19, which helps to accurately adjust the parameters of the pressure on the device and improve the connection quality between the device and the circuit board 3.

[0051] A first heating element is disposed near the first thermal expansion pad 21 on the main pressure block 15, and a second heating element is disposed near the second thermal expansion pad 22 on the pre-pressure block 19. In this embodiment, the first heating element and the second heating element are respectively configured as a first electric heating plate 23 and a second electric heating plate 24 installed on the top surface of the first mounting groove and the top surface of the second mounting groove. Both the first electric heating plate 23 and the second electric heating plate 24 are electrically connected to an external power supply device and controlled by a control component. The temperature of the first electric heating plate 23 and the second electric heating plate 24 is changed by changing the heating power of the external power supply device.

[0052] In this embodiment, a first temperature sensor and a second temperature sensor are respectively disposed in the first thermal expansion pad 21 and the second thermal expansion pad 22. Both the first and second temperature sensors are connected to the control component for signal detection and output of temperature detection signals. Preferably, in practical applications, the temperature sensors are miniature temperature probes, which are inserted into the silicone pad layer during installation. Both the first and second heating elements are connected to the control component for control. The control component receives the temperature detection signals from the first and second temperature sensors, generates and outputs control signals to control the temperatures of the first electric heating plate 23 and the second electric heating plate 24.

[0053] The above technical solution allows for fine-tuning of the downward pressing distance of the main pressure block 15 by controlling the temperature of the first heating element. This enables adjustment of the distance the device to be pressed is pushed down within a small range, thereby changing the insertion state between the terminal and the PCB through-hole 2. By controlling the temperature of the second heating element to fine-tune the downward pressing distance of the pre-pressure block 19, the timing of the pre-pressure block 19 pre-pressing the device can be adjusted, achieving precise adjustment of the relative position between the device terminal and the PCB board, ensuring the connection quality and reliability between the device and the circuit board 3.

[0054] In a further optimized configuration, the first heating element includes multiple independently controlled sub-heating plates arranged along the length of the first mounting groove, each sub-heating plate being controlled and connected to a control assembly. This allows for fine-tuning of the tilt angle of the main pressing surface 16 during the pressing process, facilitating adjustment of the pressure exerted on the device terminals during pressing.

[0055] In this embodiment, the lifting mechanism is configured to lift the device to be crimped upwards before being crimped, so as to finely adjust its posture at the instant before crimping.

[0056] Combination Figure 4 As shown in the embodiment of this application, an airflow channel 25 is provided in the main pressure block 15, and the airflow channel 25 forms at least two negative pressure air holes 26 on the main pressure surface 16. The negative pressure air holes 26 are evenly distributed around the pre-pressure surface 20 on the main pressure surface 16.

[0057] The lifting mechanism includes a negative pressure device connected to the airflow channel 25 via a negative pressure hose 27, and a distance sensor for detecting the distance between the upper template 5 and the lower template 6. Specifically, the airflow channel 25 forms an air intake on the side wall of the main pressure block 15. One end of the negative pressure hose 27 is connected to the air intake, and the other end is connected to the negative pressure device, such as a negative pressure tank. A solenoid valve is installed on the negative pressure hose 27 to control the airflow. The distance sensor is an infrared distance sensor, vertically mounted on the upper template 5 or the lower template 6. The control component is signal-connected to the distance sensor and controllable by the solenoid valve, receiving and responding to the distance signal from the distance sensor to control the airflow of the solenoid valve and / or the negative pressure value of the negative pressure device.

[0058] Based on the above scheme, when the main pressure block 15 approaches the device to prepare for pressing, the control component controls the solenoid valve to turn on, and the device is subjected to an upward suction force, thus its posture is slightly adjusted. Then, under the action of the pre-pressure block 19, it is initially positioned, which can significantly reduce the tilt of the device terminal before crimping, ensuring the accurate position between the fisheye terminal 1 and the PCB through hole 2, and improving the connection quality. After the device is crimped, the main pressure surface 16 contacts the upper surface of the device. If the crimping quality is poor, the holding force between the fisheye terminal 1 and the PCB through hole 2 (the maximum force required to pull the terminal out of the hole after it is pressed in) is too small. Under the action of negative pressure suction force, the fisheye terminal 1 will detach from the PCB through hole 2 along with the device or become obviously loose. In the subsequent quality inspection process, the circuit board 3 with crimping quality problems can be quickly identified. The initial inspection of crimping quality is completed at the same time as the crimping is completed. The above-mentioned lifting mechanism is particularly suitable for connecting devices 4 with a closed plane upper surface (such as... Figure 2 Connector 4 shown.

[0059] In certain embodiments, such as when the device itself or its accessories are magnetic, the lifting mechanism may be implemented using a magnet disposed on the main pressure block 15.

[0060] like Figure 5 As shown in the embodiments of this application, the control components include: a control program storage unit 100, a signal acquisition unit 200, a signal processing unit 300, and a signal output unit 400.

[0061] The control program storage unit 100 is configured to store the control program for executing each crimping step. The control program includes functional modules such as control logic, crimping parameters, and communication processing.

[0062] The signal acquisition unit 200 is configured to acquire and preprocess the spacing detection signal between the upper template 5 and the lower template 6, the temperature detection signals of the first heating element and the second heating element, the airflow of the solenoid valve, and the negative pressure value signal of the negative pressure device. The preprocessing includes signal filtering and amplification. The signal processing unit 300 is configured to generate corresponding control command signals based on the spacing detection signal, the temperature detection signal, and the negative pressure value signal, according to the control program. The signal output unit 400 is configured to receive the control command signals and output them to the corresponding action execution terminal. In this embodiment, the action execution terminal includes the drive element 7, the solenoid valve, the power supply device corresponding to the first electric heating plate 23 and the second electric heating plate 24, and the negative pressure device.

[0063] The above technical solution allows for precise control of the entire device's operation process based on the set control program and the real-time operating status of each component, ensuring connection quality and reliability.

[0064] To further improve connection quality and ensure stable and reliable connection, the control component also includes a quality inspection data acquisition unit 500, a data association unit 600, a parameter optimization unit 700, and a control optimization unit 800.

[0065] The quality inspection data acquisition unit 500 is configured to receive and store quality inspection data for subsequent quality inspection processes. The quality inspection data includes contact resistance and / or holding force data between the fisheye terminal 1 and the PCB through hole 2.

[0066] The data association unit 600 is configured to number each device and associate the crimping parameters corresponding to each number with the quality inspection data. The parameter optimization unit 700 includes a machine learning model, such as a trained neural network model or a random forest model, configured to receive the quality inspection data and crimping parameter data, and obtain the crimping parameter data corresponding to the target quality inspection data using a built-in optimization algorithm, such as a Bayesian optimization algorithm. The control optimization unit 800 is data-connected to the parameter optimization unit 700 and configured to optimize and update the control program based on the crimping parameter data.

[0067] The aforementioned pressing parameters include the spacing between the upper template 5 and the lower template 6, the temperature of the first electric heating plate 23 and the second electric heating plate 24, the airflow of the solenoid valve, and the negative pressure value of the negative pressure device.

[0068] The above technical solution enables the control component to continuously adjust the crimping parameters based on the quality inspection data of subsequent quality inspection processes. Even if there are slight deviations in the quality of the front-end process, such as a decrease in the placement accuracy of the device, the control component can adjust the crimping parameters based on the subsequent quality inspection results to keep the crimping quality stable.

[0069] Based on the intelligent crimping device for PCB board connectors 4 as described above, this application also discloses an intelligent crimping method for PCB board connectors, including: S100, place the device to be crimped on the circuit board 3, so that the device terminal, i.e. the end where the fisheye structure is located in the fisheye terminal 1, is aligned with the PCB through hole 2 to form an assembly, and complete the crimping preparation.

[0070] S200: The assembly of the device and circuit board 3 is placed on the lower template 6 and the circuit board 3 is fixed by the retaining member. In practical applications, the circuit board 3 can also be fixed first, and then the device to be crimped is placed on it.

[0071] S300, adjust the first heating element and the second heating element to the preset temperature according to the initial settings of the control program. In actual applications, this step is a preparation step. The preset temperature is the ambient temperature by default, that is, no heating treatment is performed on the pad layer. In specific embodiments, the value of the above preset temperature can be determined according to the historical production data of the current batch of products, such as historical pressing parameters.

[0072] S400, the upper template 5 is moved down or the lower template 6 is moved up by the driving component 7, so that the main pressure block 15 is close to the surface of the device to be pressed.

[0073] S500 monitors the distance between the upper template 5 and the lower template 6 in real time during the downward movement of the upper template 5 or the upward movement of the lower template 6. If the distance between the two is reduced to the first set value, the solenoid valve is controlled to open the negative pressure hose 27 and maintain the first airflow.

[0074] S600, reduce or maintain the current drive speed of drive component 7 and continue to move the upper template 5 down or the lower template 6 up.

[0075] S700, after the pre-pressing block 19 contacts the upper surface of the device to achieve pre-pressing, the upper template 5 is moved down or the lower template 6 is moved up, so that the main pressing surface 16 contacts the upper surface of the device.

[0076] S800, continue to move the upper template 5 down or the lower template 6 up. When the distance between them decreases to the second set value, stop the current driving action of the drive component 7 and start reverse driving. Control the solenoid valve to make the negative pressure hose 27 maintain the second airflow. In general implementation, the first airflow and the second airflow are set to the same value. In a specific implementation, the second airflow is greater than the first airflow to check the holding force after the device is crimped.

[0077] S900, during the reverse drive process of the drive component 7, when the distance between the upper template 5 and the lower template 6 reaches the third set value, the control solenoid valve shuts off the negative pressure hose 27.

[0078] S1000, the driving component 7 drives the upper template 5 or the lower template 6 to move continuously back to the initial position.

[0079] In this embodiment of the application, the intelligent crimping method further includes a crimping parameter optimization step, comprising: A100 acquires and stores quality inspection data for subsequent quality inspection processes. The quality inspection data includes contact resistance and / or holding force data between the fisheye terminal 1 and the PCB through-hole 2.

[0080] A200 assigns numbers to each component and associates and stores the crimping parameters corresponding to each number with quality inspection data. The associated and stored data can be used as reference data for subsequent optimization algorithms or model training data. The crimping parameters include the spacing between the upper template 5 and the lower template 6, the temperatures of the first electric heating plate 23 and the second electric heating plate 24, the airflow of the solenoid valve at each stage of crimping, and the negative pressure value of the negative pressure device.

[0081] The A300, based on a machine learning model, such as a neural network model, obtains the crimping parameter data corresponding to the target quality inspection data through a built-in optimization algorithm based on the quality inspection data and crimping parameter data.

[0082] A400 optimizes and updates the control program based on the crimping parameter data.

[0083] By following the above steps to optimize the crimping parameters, the crimping parameters can be adjusted in a timely manner according to changes in product quality during actual production, thus ensuring stable crimping quality.

[0084] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An intelligent crimping device for PCB board connectors, characterized in that, It includes an upper template (5), a lower template (6), a driving component (7) that drives the upper template (5) and the lower template (6) to move relative to each other, and a control component; The lower template (6) is provided with at least one retaining member for placing the device to be pressed and the circuit board (3); At least one set of pressing components is provided on the upper template (5) corresponding to the retaining member; The crimping assembly includes: The mounting base block (14) is detachably connected to the upper template (5), and a first mounting groove is provided on the side facing the lower template (6); The main pressure block (15) is located in the first mounting groove at one end near the upper template (5), and the end face away from the upper template (5) is configured as the main pressure surface (16). The shape and size of the main pressure surface (16) are adapted to the shape and size of the top surface of the device to be pressed, and a second mounting groove is provided in the middle of the main pressure surface (16) along its height direction. The pre-compression block (19) has one end near the main compression block (15) movably disposed in the second mounting groove and an elastic element (18) is provided between it and the second mounting groove. The end face away from the main compression block (15) extends out of the second mounting groove and is configured as a pre-compression surface (20). The pressure regulating component includes a first pressure regulating component disposed between the mounting base (14) and the main pressure block (15) for adjusting the relative height between the main pressure surface (16) and the mounting base (14), and a second pressure regulating component disposed between the main pressure block (15) and the pre-pressure block (19) for adjusting the relative height between the pre-pressure surface (20) and the main pressure surface (16); The lifting mechanism is configured to lift the device to be crimped upwards before it is subjected to pressure. The drive component (7), pressure regulating component, and lifting mechanism are all connected to the control component. In the initial state, the height of the pre-compression surface (20) is lower than the height of the main pressure surface (16). In the pushing state, the height of the pre-compression surface (20) is flush with the height of the main pressure surface (16). The control component controls the drive component (7) to drive the upper template (5) to press down or the lower template (6) to move up. When the distance between the main pressing surface (16) and the device is less than the set value, the control component controls the lifting mechanism to lift the device to be pressed up. When the distance between the upper template (5) and the lower template (6) reaches the set value, the control component controls the upper template (5) or the lower template (6) to return to the initial position.

2. The intelligent crimping device for PCB board connectors according to claim 1, characterized in that, Both the first mounting slot and the second mounting slot are configured as T-slots; The main pressure block (15) is T-shaped at one end near the upper template (5) and is arranged to slide up and down with the first mounting groove; The pre-compression block (19) is T-shaped at one end near the main compression block (15) and is arranged to slide up and down with the second mounting groove; The first pressure regulating component includes a first thermal expansion pad (21) disposed between the upper end face of the main pressure block (15) and the top surface of the first mounting groove; The second pressure regulating component includes a second thermal expansion pad (22) disposed between the upper end face of the pre-compression block (19) and the top surface of the second mounting groove; The main pressure block (15) is provided with a first heating element near the first thermal expansion pad (21), and the pre-pressure block (19) is provided with a second heating element near the second thermal expansion pad (22); Both the first heating element and the second heating element are connected to the control component and adjust their own heating temperature in response to the control command of the control component.

3. The intelligent crimping device for PCB board connectors according to claim 2, characterized in that, Both the first thermal expansion pad (21) and the second thermal expansion pad (22) are configured as silicone pads; The first heating element and the second heating element are respectively configured as a first electric heating plate (23) and a second electric heating plate (24) installed on the top surface of the first mounting groove and the top surface of the second mounting groove. The first electric heating plate (23) and the second electric heating plate (24) are both electrically connected to an external power supply device and controlled by the control component. The control component receives the temperature detection signal from the first temperature sensor and the second temperature sensor, generates and outputs a control signal to control the temperature of the first electric heating plate (23) and the second electric heating plate (24).

4. The intelligent crimping device for PCB board connectors according to claim 2, characterized in that, The first mounting groove penetrates the two opposite sidewalls of the mounting base block (14), and the main pressure block (15) is slidably disposed along the length direction of the first mounting groove; A limiting member is provided between the mounting base block (14) and the main pressure block (15) to restrict the main pressure block (15) from sliding along the length direction of the first mounting groove.

5. The intelligent crimping device for PCB board connectors according to claim 4, characterized in that, The first heating element includes multiple sub-heating plates arranged along the length of the first mounting groove and controlled independently, and each sub-heating plate is connected to the control component.

6. The intelligent crimping device for PCB board connectors according to claim 2, characterized in that, The lifting mechanism includes a magnet disposed on the main pressure block (15); or The main pressure block (15) is provided with an airflow channel (25), and the airflow channel (25) forms at least two negative pressure air holes (26) on the main pressure surface (16); the lifting mechanism includes a negative pressure device connected to the airflow channel (25) via a negative pressure hose (27), and a distance sensor for detecting the distance between the upper template (5) and the lower template (6). The negative pressure hose (27) is provided with a solenoid valve to control the airflow. The control component is signal-connected to the distance sensor and control-connected to the solenoid valve, receives and responds to the distance measurement signal of the distance sensor, and controls the opening and closing of the solenoid valve.

7. The intelligent crimping device for PCB board connectors according to claim 1, characterized in that, The upper template (5) and the lower template (6) are rectangular and each corner is provided with a guide rod (8); The drive unit (7) includes a cylinder module or a linear ball screw module that is controlled and connected to the control component; wherein: The cylinder module is located below the lower template (6), and its telescopic end is fixedly connected to the lower template (6) to push the lower template (6) to reciprocate in the vertical direction; The linear ball screw module includes a fixed base, a servo motor, a guide rail and a slider. The upper template (5) is fixedly connected to the slider, and the fixed base is fixedly connected to the lower template (6). The upper template (5) is driven to move up and down reciprocally via the servo motor.

8. The intelligent crimping device for PCB board connectors according to claim 6, characterized in that, The control component includes: The control program storage unit (100) is configured to store the control program for executing each crimping step; The signal acquisition unit (200) is configured to acquire and preprocess the spacing detection signal between the upper template (5) and the lower template (6), the temperature detection signals of the first heating element and the second heating element, the air flow rate of the solenoid valve, and the negative pressure value signal of the negative pressure device; The signal processing unit (300) is configured to generate a control command signal based on the control program according to the spacing detection signal, the temperature detection signal and the negative pressure value signal; The signal output unit (400) is configured to receive the control command signal and output it to the corresponding action execution terminal; The control program includes control logic and crimping parameters; The action execution terminal includes a drive unit (7), a solenoid valve, a power supply device corresponding to the first electric heating plate (23) and the second electric heating plate (24), and a negative pressure device.

9. The intelligent crimping device for PCB board connectors according to claim 8, characterized in that, The control component includes: The control component further includes: The quality inspection data acquisition unit (500) is configured to receive and store quality inspection data for subsequent quality inspection processes; The data association unit (600) is configured to number each device and associate and store the crimping parameters corresponding to each number with the quality inspection data; The parameter optimization unit (700) includes a machine learning model configured to receive the quality inspection data and the crimping parameter data, and obtain the crimping parameter data corresponding to the target quality inspection data through a built-in optimization algorithm. The control optimization unit (800) is configured to optimize and update the control program based on the crimping parameter data; The quality inspection data includes contact resistance and / or holding force data between the fisheye terminal (1) and the PCB through hole (2); The pressing parameters include the spacing between the upper template (5) and the lower template (6), the temperature of the first electric heating plate (23) and the second electric heating plate (24), the airflow of the solenoid valve, and the negative pressure value of the negative pressure device.

10. A method for intelligent crimping of PCB board connectors, characterized in that, The intelligent crimping device for PCB board connectors as described in claim 9 includes: Place the device to be crimped on the circuit board (3) and align the device terminals with the PCB through holes (2) to complete the crimping preparation; The assembly of the device and the circuit board (3) is placed on the lower template (6) and the circuit board (3) is fixed by the retaining member; The first and second heating elements are adjusted to the preset temperature according to the initial settings of the control program; The upper template (5) is moved down or the lower template (6) is moved up by the driving component (7), so that the main pressure block (15) approaches the surface of the device to be pressed. During the process of the upper template (5) moving down or the lower template (6) moving up, the distance between the upper template (5) and the lower template (6) is monitored in real time. If the distance between the two is reduced to the first set value, the solenoid valve is controlled to open the negative pressure hose (27) and maintain the first air flow rate. Reduce or maintain the current driving speed of the drive unit (7) and continue to move the upper template (5) down or the lower template (6) up; After the pre-pressing block (19) contacts the upper surface of the device to achieve pre-pressing, the upper template (5) continues to move down or the lower template (6) moves up, so that the main pressing surface (16) contacts the upper surface of the device. Continue to move the upper template (5) down or the lower template (6) up. When the distance between the two is reduced to the second set value, stop the current driving action of the drive component (7) and start reverse driving. Control the solenoid valve so that the negative pressure hose (27) maintains the second airflow. During the reverse drive process of the drive component (7), when the distance between the upper template (5) and the lower template (6) reaches the third set value, the control solenoid valve shuts off the negative pressure hose (27); The driving component (7) drives the upper template (5) or the lower template (6) to move continuously back to the initial position; The intelligent crimping method further includes a crimping parameter optimization step, comprising: Acquire and store quality inspection data for subsequent quality inspection processes; Each component is numbered, and the crimping parameters corresponding to each number are associated with and stored with the quality inspection data; Based on a machine learning model, and according to the quality inspection data and crimping parameter data, the crimping parameter data corresponding to the target quality inspection data is obtained through a built-in optimization algorithm. The control program is optimized and updated based on the crimping parameter data; The quality inspection data includes contact resistance and / or holding force data between the fisheye terminal (1) and the PCB through hole (2); The pressing parameters include the spacing between the upper template (5) and the lower template (6), the temperature of the first electric heating plate (23) and the second electric heating plate (24), the airflow of the solenoid valve at each stage of pressing, and the negative pressure value of the negative pressure device.

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