A stable assembly method and system for a positive pressure nitrogen blow-out assembly

Abstract

This invention relates to the field of component assembly technology, specifically a stable assembly method and system for positive pressure nitrogen blowing components. The method includes: confirming the component assembly environment based on component assembly instructions; calculating the upper assembly torque based on external force resistance and force compression curves; predicting assembly parameters for the lower end wear resistance index and nozzle pressure resistance parameter set using a pre-constructed assembly model to obtain the lower end assembly torque; performing stable assembly of the nitrogen blowing component assembly, micro-ferrule connector, O-ring, and nitrogen blowing nozzle based on the upper and lower end assembly torques and a torque wrench to obtain a positive pressure nitrogen blowing device; conducting an airtightness test on the positive pressure nitrogen blowing device to obtain a comprehensive stability; and if the comprehensive stability is greater than or equal to a stability threshold, then the positive pressure nitrogen blowing device is used as a stable nitrogen blowing device, completing the stable assembly of the positive pressure nitrogen blowing component. This invention can improve the automation and reliability of assembling positive pressure nitrogen blowing components and enhance the airtightness of the assembled product.

Description

Technical Field

[0001] This invention relates to the field of component assembly technology, and in particular to a stable assembly method and system for positive pressure nitrogen blowing components. Background Technology

[0002] In fields such as chemical analysis, pharmaceutical testing, and laboratory automation, nitrogen blowing technology is widely used for rapid solvent evaporation, sample concentration, or precision liquid processing. As instruments and equipment evolve towards higher throughput and automation, higher demands are being placed on the assembly precision and airtightness of nitrogen blowing components.

[0003] The existing assembly method for positive pressure nitrogen blowing components mainly involves manually or semi-automatically installing the distribution manifold, ferrule, O-ring, and nitrogen blowing needle, and assembling the components into a whole device by screwing them in and controlling the torque.

[0004] However, the existing assembly process for nitrogen blowing assemblies typically uses uniform tightening torque, insertion depth, and sealing compression. But assemblies from different batches or suppliers vary in physical properties such as material hardness, dimensional tolerances, and thread precision. If uniform assembly parameters are still used, it is easy to cause insufficient airtightness or damage to the assemblies. Therefore, there is an urgent need for a stable assembly method that can evaluate the performance of the assemblies, calculate the optimal assembly torque, and iteratively optimize it in combination with airtightness testing, so as to improve the automation and reliability of assembling positive pressure nitrogen blowing assemblies and enhance the airtightness of the assembled products. Summary of the Invention

[0005] This invention provides a stable assembly method for positive pressure nitrogen blowing components and a computer-readable storage medium. Its main purpose is to improve the automation and reliability of assembling positive pressure nitrogen blowing components and enhance the airtightness of the assembled product.

[0006] To achieve the above objectives, the present invention provides a stable assembly method for a positive pressure nitrogen blowing assembly, comprising:

[0007] Receive component assembly instructions, and confirm the component assembly environment based on the component assembly instructions. The component assembly environment includes: torque wrench, nitrogen blow assembly set, miniature ferrule connector, O-ring and nitrogen blow needle.

[0008] The performance characteristics of the O-rings were extracted to obtain their resistance to external forces and their compression curves.

[0009] Friction tests were conducted on the miniature ferrule connector to obtain the wear resistance index of the lower end, and pressure tests were conducted on the nitrogen blowing needle to obtain the set of pressure resistance parameters of the needle.

[0010] The upper assembly torque is calculated based on the external force resistance and the force compression curve.

[0011] The assembly parameters of the lower end are predicted by using a pre-built assembly model to predict the wear resistance index and the pressure resistance parameter set of the nozzle, and the assembly torque of the lower end is obtained.

[0012] Based on the upper assembly torque, lower assembly torque and torque wrench, the nitrogen blowing assembly, micro ferrule, O-ring and nitrogen blowing needle are stably assembled to obtain a positive pressure nitrogen blowing device.

[0013] An airtightness test was performed on the positive pressure nitrogen blowing device to obtain its overall stability.

[0014] Compare the overall stability with the preset stability threshold. If the overall stability is less than the stability threshold, perform pinhole fine-tuning on the positive pressure nitrogen blowing device to obtain a new nitrogen blowing device. Use the new nitrogen blowing device as the positive pressure nitrogen blowing device and return to the step of performing airtightness testing on the positive pressure nitrogen blowing device until the overall stability is greater than or equal to the stability threshold.

[0015] If the overall stability is greater than or equal to the stability threshold, the positive pressure nitrogen blowing device is used as a stable nitrogen blowing device to complete the stable assembly of the positive pressure nitrogen blowing component.

[0016] Optionally, the nitrogen blowing assembly in the component assembly environment includes: a nitrogen inlet pipe, a pressure regulating valve, a distribution manifold, and a nozzle holder. The pressure regulating valve includes: a regulating inlet end and a regulating outlet end. The distribution manifold includes: a main inlet end and multiple distribution ends. Each distribution end includes: a distribution threaded outlet. The nozzle holder includes: multiple fixing holes, and the number of fixing holes is equal to the number of distribution ends. The miniature ferrule connector includes: an upper interface, a lower interface, and a nut. The upper interface includes: an annular sealing groove, and the nut includes: a ferrule ring.

[0017] Optionally, the step of extracting performance characteristics of the O-ring to obtain its resistance to external forces and its compression curve includes:

[0018] The hardness of the O-ring was obtained by testing the hardness of the soft ring using a pre-constructed hardness tester.

[0019] Acquire a tensile testing machine and a compression testing machine, wherein the tensile testing machine includes: a force sensor, a displacement sensor, a fixing fixture and a tension rod, and the compression testing machine includes: a compression testing table and a test pressure plate;

[0020] Based on the O-ring, the fixing fixture of the tensile testing machine and the tensile rod, confirm the fixing of the O-ring, and confirm the initial diameter and initial thickness of the fixing O-ring;

[0021] The tensile testing machine's tension bar is used to stretch the fixed O-ring, and the tensile force and displacement of the tension bar are monitored in real time until the fixed O-ring breaks. The tensile force monitored by the tension bar when the fixed O-ring breaks is taken as the ultimate tensile force, and the tensile displacement monitored by the displacement bar when the fixed O-ring breaks is taken as the ultimate displacement.

[0022] A stable O-ring was identified based on the pressure test bench and experimental pressure plate in the O-ring and pressure testing machine.

[0023] The pressure is applied to the stable O-ring based on the preset pressure timing and the experimental pressure plate of the pressure testing machine. The parameters of the experimental pressure plate are read based on the preset monitoring interval until the stable O-ring cracks, resulting in multiple pressure displacement groups. The pressure displacement groups include: pressure plate pressure and pressure plate displacement.

[0024] The ultimate pressure was determined based on multiple pressure displacement groups, where the ultimate pressure is the largest pressure plate pressure among the multiple pressure displacement groups;

[0025] Multiple pressure displacement points were identified on a pre-constructed first coordinate system based on multiple pressure displacement groups. The horizontal axis of the first coordinate system represents the pressure of the pressure plate, and the vertical axis represents the displacement of the pressure plate.

[0026] Curve fitting is performed on multiple pressure displacement points to obtain the stress compression curve;

[0027] The resistance to external forces is calculated based on the soft ring's hardness, initial thickness, initial diameter, ultimate tensile force, ultimate displacement, and ultimate compressive force. The calculation formula is shown below:

[0028]

[0029] in, For resistance to external forces, The hardness of the soft ring, For the ultimate displacement, and These are the ultimate tensile force and the ultimate compressive force, respectively. and These are the initial diameter and initial thickness, respectively. It is the natural logarithm.

[0030] Optionally, the friction test on the miniature ferrule connector to obtain the wear resistance index of the lower end includes:

[0031] A pre-built industrial camera was used to photograph the ferrule ring in the miniature ferrule connector to obtain an image of the ferrule surface;

[0032] The surface finish of the SIM card sleeve is obtained by performing a difference analysis on the surface image of the SIM card sleeve and a pre-constructed standard SIM card sleeve image using a pre-built image difference model.

[0033] Obtain a wear testing machine, wherein the wear testing machine includes: a friction column and a friction holder;

[0034] Confirm the initial mass of the ferrule;

[0035] Based on the aforementioned ferrule and the friction retainer and friction column in the wear testing machine, the fixed alignment ferrule was confirmed;

[0036] The fixed alignment ferrule is rubbed based on the preset friction speed, preset friction time and friction column in the wear tester, and the fixed alignment ferrule is monitored during the friction process using a pre-constructed infrared thermometer and monitoring intervals to obtain the worn ferrule and multiple friction temperatures.

[0037] The highest friction temperature was determined based on multiple friction temperatures, where the highest friction temperature is the largest among the multiple friction temperatures.

[0038] Confirm the wear quality of the worn retaining ring;

[0039] The lower end wear resistance index is calculated based on friction speed, friction time, ferrule surface finish, initial mass, wear mass, and maximum friction temperature. The calculation formula is shown below:

[0040]

[0041] in, The lower end wear resistance index, and These are the initial mass and the wear mass, respectively. For the smoothness of the card sleeve, and These are the friction speed and friction time, respectively. The highest friction temperature, It is the hyperbolic tangent function. It is a natural constant.

[0042] Optionally, the pressure test performed on the nitrogen blowing needle to obtain a set of needle pressure resistance parameters includes:

[0043] Confirm the outer diameter and wall thickness of the nitrogen blowing needle;

[0044] Obtain a material testing machine, wherein the material testing machine includes: a shearing platform and shearing blades;

[0045] The nitrogen blowing nozzle is fixed on the shearing platform of the material testing machine to obtain a fixed nozzle;

[0046] Based on the preset shearing force timing and shearing blade, the fixed nozzle is sheared, and the current shearing force of the shearing blade on the fixed nozzle is monitored in real time until the fixed nozzle breaks. The current shearing force monitored when the fixed nozzle breaks is taken as the ultimate shearing force.

[0047] By summarizing the outer diameter of the blow needle, the needle wall thickness, and the ultimate shear force, a set of pressure resistance parameters for the blow needle is obtained.

[0048] Optionally, the calculation of the upper assembly torque based on the external force resistance and the force compression curve includes:

[0049] Calculate the target compressive displacement based on the resistance to external forces;

[0050] The target compression point is identified in the force-compression curve based on the target compression displacement, wherein the target compression point is located on the force-compression curve and the vertical coordinate of the target compression point in the first coordinate system is the target compression displacement;

[0051] The target compression pressure is determined based on the target compression point, where the target compression pressure is the abscissa of the target compression point in the first coordinate system;

[0052] Confirm the outer diameter of the upper thread and the upper friction coefficient of the miniature ferrule connector;

[0053] The upper assembly torque is calculated based on the target compression pressure, the outer diameter of the upper thread, and the upper friction coefficient.

[0054] Optionally, the stable assembly of the nitrogen blowing assembly, micro-ferrule connector, O-ring, and nitrogen blowing needle based on the upper assembly torque, lower assembly torque, and torque wrench to obtain a positive pressure nitrogen blowing device includes:

[0055] Input the lower end assembly torque into the torque wrench to obtain the lower end wrench;

[0056] Based on the preset installation depth, the nitrogen blowing needle is inserted into the lower interface of the micro ferrule connector, and the nut of the micro ferrule connector is tightened with the lower wrench to obtain a ferrule connector with a needle.

[0057] Insert the O-ring into the annular sealing groove at the upper interface of the pin-type ferrule connector to obtain the ferrule connector.

[0058] Perform the following operation on each of the multiple gas distributors in the distribution manifold:

[0059] Input the upper assembly torque into the torque wrench to obtain the upper wrench;

[0060] Use the upper wrench to screw the gas distribution thread outlet of the gas distribution end to the upper interface of the waiting ferrule connector to obtain the initial connection end;

[0061] By summing the initial connection points, multiple initial connection points are obtained;

[0062] Multiple initial connection ends are fixed to multiple fixing holes on the nozzle fixing seat to obtain multiple fixed connection ends, wherein each fixed connection end corresponds to a fixing hole.

[0063] The connection and distribution manifold was identified based on multiple fixed connection ends and distribution manifolds;

[0064] Connect the main air inlet of the distribution manifold to the regulating air outlet of the pressure regulating valve, and connect the nitrogen inlet pipe of the nitrogen blowing assembly to the regulating air inlet of the pressure regulating valve to obtain a positive pressure nitrogen blowing device.

[0065] Optionally, the airtightness test of the positive pressure nitrogen blowing device to obtain the overall stability includes:

[0066] Obtain leak detection fluid and a brush;

[0067] Confirm the multiple upper and lower connection points of the positive pressure nitrogen blowing device, wherein each upper and lower connection point corresponds one-to-one with the fixed connection end;

[0068] Perform the following operation at each of the multiple upper connection points in the positive pressure nitrogen blowing device:

[0069] Use a brush to apply leak detection fluid to the upper connection point to cover the connection point;

[0070] An industrial camera was used to photograph the cover joint to obtain an image of the covered liquid;

[0071] Start the positive pressure nitrogen blowing device, and identify the operating connection point based on the positive pressure nitrogen blowing device and the cover connection point after startup;

[0072] An industrial camera is used to photograph the connection points to obtain images of the liquid in operation;

[0073] The difference in the liquid level was determined based on the image difference model, the covered liquid image, and the running liquid image.

[0074] Summarize the differences in the loading solution to obtain multiple differences in the loading solution;

[0075] Based on leak detection fluid, brush, positive pressure nitrogen blowing device, multiple lower end connections, industrial camera and image difference model, multiple lower fluid differences were identified.

[0076] The overall stability is calculated based on multiple differences in the upper and lower fluids.

[0077] Optionally, the pinhole fine-tuning of the positive pressure nitrogen blowing device to obtain a new nitrogen blowing device includes:

[0078] For each of the multiple liquid loading differences, perform the following operation:

[0079] Compare the upper liquid difference with the preset difference threshold. If the upper liquid difference is greater than the difference threshold, the upper connection point corresponding to the upper liquid difference is regarded as the abnormal upper connection point. The upper fine-tuning torque is calculated based on the upper liquid difference, the difference threshold and the upper assembly torque.

[0080] Disassemble the abnormal upper connection to obtain the disassembled upper connection, confirm the position of the O-ring at the disassembled upper connection, and obtain the used O-ring at the O-ring position;

[0081] Determine whether the used O-ring is in a broken state. If the used O-ring is in a broken state, subtract the upper fine-tuning torque from the upper assembly torque to obtain the optimized upper torque.

[0082] If the O-ring is not broken, add the upper assembly torque to the upper fine-tuning torque to obtain the optimized upper torque;

[0083] Based on the optimized upper torque and torque wrench, the optimized upper wrench is identified. The O-ring is placed in the O-ring position of the disassembled upper connection to obtain the updated disassembled upper part. The optimized upper wrench is used to screw the updated disassembled upper part to obtain a stable upper connection.

[0084] If the difference in the upper liquid is less than or equal to the difference threshold, then the upper connection point corresponding to the difference in the upper liquid is taken as the stable upper connection point.

[0085] By summing up the stable upper connection points, multiple stable upper connection points are obtained;

[0086] For each of the multiple fluid difference rates, perform the following operation:

[0087] Compare the lower liquid difference degree with the difference threshold. If the lower liquid difference degree is greater than the difference threshold, the lower connection point corresponding to the lower liquid difference degree is regarded as the abnormal lower connection point. The lower fine-tuning torque is obtained based on the lower liquid difference degree, the difference threshold and the lower assembly torque.

[0088] Disassemble the abnormal lower connection to obtain the disassembled lower connection and the used spray needle;

[0089] Determine if there are cracks in the used spray needle. If there are cracks in the used spray needle, subtract the lower end fine-tuning torque from the lower end assembly torque to obtain the optimized lower end torque.

[0090] If there are no cracks after using the spray needle, add the lower end assembly torque and the lower end fine-tuning torque to obtain the optimized lower end torque;

[0091] Based on optimizing the lower torque and obtaining the optimized lower wrench;

[0092] Based on the installation depth, the nitrogen blowing needle is inserted into the lower interface of the disassembly lower connection, and the nut of the miniature ferrule connector at the disassembly lower connection is tightened using an optimized lower wrench to obtain a stable lower connection.

[0093] By summarizing the stable lower connection points, multiple stable lower connection points are obtained;

[0094] Based on multiple stable upper connection points, multiple stable lower connection points, and the positive pressure nitrogen blowing device, the replacement nitrogen blowing device was identified.

[0095] To achieve the above objectives, the present invention also provides a stable assembly system for a positive pressure nitrogen blowing assembly, comprising:

[0096] The assembly environment confirmation module is used to receive component assembly instructions and confirm the component assembly environment based on the component assembly instructions. The component assembly environment includes: torque wrench, nitrogen blowing component set, micro ferrule connector, O-ring and nitrogen blowing needle.

[0097] The component property analysis module is used to extract the performance characteristics of O-rings, obtain the external force resistance and stress compression curve, perform friction tests on micro ferrule joints to obtain the lower end wear resistance index, and perform pressure tests on nitrogen blowing needles to obtain the needle pressure resistance parameter set.

[0098] The assembly parameter confirmation module is used to calculate the upper assembly torque based on the external force resistance and the force compression curve. It uses a pre-built assembly model to predict the assembly parameters of the lower wear index and the nozzle pressure resistance parameter set to obtain the lower assembly torque. Based on the upper assembly torque, the lower assembly torque and the torque wrench, the nitrogen blowing assembly, the micro ferrule, the O-ring and the nitrogen blowing nozzle are stably assembled to obtain the positive pressure nitrogen blowing device.

[0099] The nitrogen blowing device calibration module is used to perform an airtightness test on the positive pressure nitrogen blowing device to obtain the overall stability. The overall stability is compared with a preset stability threshold. If the overall stability is less than the stability threshold, the positive pressure nitrogen blowing device is finely adjusted with pinholes to obtain a new nitrogen blowing device. The new nitrogen blowing device is used as the positive pressure nitrogen blowing device, and the process of performing an airtightness test on the positive pressure nitrogen blowing device is repeated until the overall stability is greater than or equal to the stability threshold. If the overall stability is greater than or equal to the stability threshold, the positive pressure nitrogen blowing device is used as the stable nitrogen blowing device, and the stable assembly of the positive pressure nitrogen blowing component is completed.

[0100] To address the above problems, the present invention also provides an electronic device, the electronic device comprising:

[0101] Memory, storing at least one instruction; and

[0102] The processor executes the instructions stored in the memory to implement the stable assembly method for the positive pressure nitrogen blowing assembly described above.

[0103] To address the aforementioned problems, the present invention also provides a computer-readable storage medium storing at least one instruction, which is executed by a processor in an electronic device to implement the aforementioned stable assembly method for a positive pressure nitrogen blowing assembly.

[0104] To address the problems described in the background art, this invention receives component assembly instructions and identifies the component assembly environment based on these instructions. The component assembly environment includes: a torque wrench, a nitrogen blowing assembly set, a miniature ferrule connector, an O-ring, and a nitrogen blowing needle. This invention, by identifying the component assembly environment, recognizes the required components and tools, achieving standardization and process streamlining of the assembly environment. This provides a foundation for subsequent automated assembly, reduces manual configuration errors, and allows for performance characteristic extraction of the O-ring to obtain its external force resistance and compression curve. Furthermore, friction testing is performed on the miniature ferrule connector to obtain its lower end wear resistance index. Pressure tests were performed on the nitrogen blowing needle to obtain a set of needle pressure resistance parameters. It is evident that this embodiment of the invention tests the physical properties of the O-ring, micro-ferrule connector, and nitrogen blowing needle, facilitating the subsequent confirmation of a reasonable assembly torque based on these physical properties, thereby improving the automation and reliability of the assembly process. The upper assembly torque is calculated based on the external force resistance and the force compression curve. Using a pre-constructed assembly model, the lower end wear resistance index and the needle pressure resistance parameter set are used to predict the assembly parameters, resulting in the lower end assembly torque. It is clear that this embodiment of the invention predicts the ideal assembly torque by referring to historical data and physical properties, improving the assembly of positive pressure nitrogen blowing components. To improve the reliability and airtightness of the assembled product, the nitrogen blowing assembly, micro-ferrule connector, O-ring, and nitrogen blowing needle are stably assembled using the upper and lower assembly torques and a torque wrench, resulting in a positive pressure nitrogen blowing device. An airtightness test is then performed on the positive pressure nitrogen blowing device to obtain its overall stability. This invention demonstrates that by using a predetermined torque, fully controllable automated assembly is achieved, ensuring optimal airtightness at each connection point, improving overall assembly reliability and automation. Furthermore, by conducting an airtightness test on the positive pressure nitrogen blowing device, leakage defects are automatically detected, improving the consistency and quality controllability of the assembled product. The overall stability is compared with the preset value. If the overall stability is less than the stability threshold, the positive pressure nitrogen blowing device is fine-tuned via pinholes to obtain a new nitrogen blowing device. This new nitrogen blowing device is then used as the positive pressure nitrogen blowing device, and the process of performing an airtightness test on the positive pressure nitrogen blowing device is repeated until the overall stability is greater than or equal to the stability threshold. If the overall stability is greater than or equal to the stability threshold, the positive pressure nitrogen blowing device is then used as the stable nitrogen blowing device, completing the stable assembly of the positive pressure nitrogen blowing assembly. It can be seen that this embodiment of the invention automatically performs pinhole fine-tuning on the positive pressure nitrogen blowing device through overall stability and a stability threshold, improving the automation level of the positive pressure nitrogen blowing assembly and enhancing the airtightness of the assembled product. Therefore, this invention can improve the automation level and reliability of assembling positive pressure nitrogen blowing components and enhance the airtightness of the assembled product. Attached Figure Description

[0105] Figure 1 This is a schematic flowchart of a stable assembly method for a positive pressure nitrogen blowing assembly according to an embodiment of the present invention;

[0106] Figure 2 A functional block diagram of a stable assembly system for a positive pressure nitrogen blowing assembly provided in an embodiment of the present invention;

[0107] Figure 3 This is a schematic diagram of the structure of an electronic device that implements the stable assembly method for a positive pressure nitrogen blowing assembly, according to an embodiment of the present invention.

[0108] Explanation of reference numerals in the attached figures:

[0109] 10. Electronic device; 11. Processor; 12. Memory; 13. Bus.

[0110] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0111] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0112] This application provides a stable assembly method for a positive pressure nitrogen blowing assembly. The execution entity of the stable assembly method for the positive pressure nitrogen blowing assembly includes, but is not limited to, at least one of the following electronic devices that can be configured to execute the method provided in this application: a server, a terminal, etc. In other words, the stable assembly method for the positive pressure nitrogen blowing assembly can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes, but is not limited to, a single server, a server cluster, a cloud server, or a cloud server cluster.

[0113] Reference Figure 1 The diagram shown is a schematic flowchart of a stable assembly method for a positive pressure nitrogen blowing assembly according to an embodiment of the present invention. In this embodiment, the stable assembly method for the positive pressure nitrogen blowing assembly includes:

[0114] S1. Receive component assembly instructions and confirm the component assembly environment based on the component assembly instructions. The component assembly environment includes: torque wrench, nitrogen blowing component set, micro ferrule connector, O-ring and nitrogen blowing needle.

[0115] It should be explained that the component assembly instruction is initiated by the staff of the positive pressure nitrogen evaporator manufacturing plant, and the positive pressure nitrogen evaporator is a type of nitrogen evaporator. For example, Xiao Zhang is a staff member of the positive pressure nitrogen evaporator manufacturing plant, and now needs to assemble a batch of newly manufactured or newly imported nitrogen evaporator component sets, micro ferrule connectors, O-rings and nitrogen evaporator nozzles into a positive pressure nitrogen evaporator, and therefore initiates the component assembly instruction.

[0116] Understandably, the component assembly environment is the necessary environment for assembling the nitrogen blowing component assembly, micro ferrule, O-ring and nitrogen blowing needle into a positive pressure nitrogen blowing device, and the component assembly environment includes: torque wrench, nitrogen blowing component assembly, micro ferrule, O-ring and nitrogen blowing needle.

[0117] In detail, the nitrogen blowing assembly in the component assembly environment includes: a nitrogen inlet pipe, a pressure regulating valve, a distribution manifold, and a nozzle holder. The pressure regulating valve includes: a regulating inlet end and a regulating outlet end. The distribution manifold includes: a main inlet end and multiple distribution ends. Each distribution end includes: a distribution threaded outlet. The nozzle holder includes: multiple fixing holes, and the number of fixing holes is equal to the number of distribution ends. The miniature ferrule connector includes: an upper interface, a lower interface, and a nut. The upper interface includes: an annular sealing groove, and the nut includes: a ferrule ring.

[0118] It should be explained that a torque wrench is a type of torque wrench. A miniature ferrule fitting is a type of ferrule fitting, and it includes: an upper interface, a lower interface, and a nut. The upper interface is used to connect the miniature ferrule fitting to the regulating outlet end of the distribution manifold, and the lower interface is used to connect the miniature ferrule fitting to the nitrogen blowing needle. The pipe diameters of both the upper and lower interfaces of the miniature ferrule fitting are preset before processing, so that the size of the upper interface matches the outlet end of the distribution manifold, and the size of the lower interface matches the outer diameter of the needle. The nut includes a ferrule, which is the clamping component of the miniature ferrule connector. It is fitted onto the outside of the lower interface and applies axial pressure to the lower interface through the threaded drive of the nut. A conical structure that mates with the ferrule is located in the inner hole of the nut. The ferrule is a ring-shaped hard metal and serves as the core sealing and clamping element of the miniature ferrule connector. When the nut is tightened along the thread, the ferrule contracts radially under pressure, thus tightly clamping the nitrogen blow needle and achieving axial fixation and airtight sealing of the nitrogen blow needle. The upper interface includes an annular sealing groove, located on the inner sidewall of the upper interface. This groove is an annular recessed structure for accommodating an O-ring. When the O-ring is assembled onto the upper interface and subjected to axial or radial pressure, it undergoes controllable elastic deformation, thereby forming an airtight seal between the metal contact surfaces. The O-ring is a circular rubber sealing ring, typically made of elastomeric materials such as fluororubber, silicone rubber, or nitrile rubber. The nitrogen purging needle is a miniature, slender needle used for nitrogen delivery and targeted purging in a positive pressure nitrogen purging system. Its front end is a micro-orifice nozzle, and its rear end is tightly connected to the lower interface of a miniature compression fitting. The nitrogen purging assembly includes: a nitrogen inlet pipe, a pressure regulating valve, a distribution manifold, and a needle holder. The pressure regulating valve includes an regulating inlet and a regulating outlet. The distribution manifold includes a main inlet and multiple branch outlets, each with a threaded outlet. The needle holder includes multiple fixing holes. The nitrogen inlet pipe is a flexible or rigid gas delivery pipeline used to deliver high-purity nitrogen. One end connects to an external nitrogen source, and the other end connects to the regulating inlet of the pressure regulating valve. The pressure regulating valve is used to continuously and adjustablely control the flow rate and pressure of nitrogen entering the positive pressure nitrogen purging system. The regulating inlet is the gas input interface of the pressure regulating valve, connected to the nitrogen inlet pipe, and the regulating outlet is the output interface of the pressure regulating valve, connected to the main inlet of the distribution manifold. A distribution manifold is a type of gas manifold. The main inlet is the main input interface of the manifold, typically a threaded or quick-connect structure, used to connect to the regulating outlet of a pressure regulating valve. The internal cavity of the distribution manifold is designed to be divided into multiple parallel output channels, each channel serving as a distribution end. Each distribution end is used to connect to a miniature ferrule connector, and the threaded outlet is a threaded connector used to mate with the upper interface of the miniature ferrule connector.The nozzle holder is a structural component used to install and position all initial connection ends. It is usually made of metal or high-strength engineering plastic and is rectangular in shape. The fixing holes are small holes on the nozzle holder that match the outer diameter of the lower end interface of the micro ferrule connector. They are used to fix the initial connection ends. The number of fixing holes in the nozzle holder is equal to the number of air distribution ends among the multiple air distribution ends, and is also equal to the number of initial connection ends among the multiple initial connection ends. That is, the air distribution ends, fixing holes and initial connection ends are all in one-to-one correspondence. For the specific application of the initial connection ends, please refer to the following embodiments.

[0119] S2. Extract the performance characteristics of the O-ring to obtain the resistance to external forces and the compression curve under stress.

[0120] In detail, the extraction of performance characteristics of the O-ring to obtain its resistance to external forces and its compression curve includes:

[0121] The hardness of the O-ring was obtained by testing the hardness of the soft ring using a pre-constructed hardness tester.

[0122] Acquire a tensile testing machine and a compression testing machine, wherein the tensile testing machine includes: a force sensor, a displacement sensor, a fixing fixture and a tension rod, and the compression testing machine includes: a compression testing table and a test pressure plate;

[0123] Based on the O-ring, the fixing fixture of the tensile testing machine and the tensile rod, confirm the fixing of the O-ring, and confirm the initial diameter and initial thickness of the fixing O-ring;

[0124] The tensile testing machine's tension bar is used to stretch the fixed O-ring, and the tensile force and displacement of the tension bar are monitored in real time until the fixed O-ring breaks. The tensile force monitored by the tension bar when the fixed O-ring breaks is taken as the ultimate tensile force, and the tensile displacement monitored by the displacement bar when the fixed O-ring breaks is taken as the ultimate displacement.

[0125] A stable O-ring was identified based on the pressure test bench and experimental pressure plate in the O-ring and pressure testing machine.

[0126] The pressure is applied to the stable O-ring based on the preset pressure timing and the experimental pressure plate of the pressure testing machine. The parameters of the experimental pressure plate are read based on the preset monitoring interval until the stable O-ring cracks, resulting in multiple pressure displacement groups. The pressure displacement groups include: pressure plate pressure and pressure plate displacement.

[0127] The ultimate pressure was determined based on multiple pressure displacement groups, where the ultimate pressure is the largest pressure plate pressure among the multiple pressure displacement groups;

[0128] Multiple pressure displacement points were identified on a pre-constructed first coordinate system based on multiple pressure displacement groups. The horizontal axis of the first coordinate system represents the pressure of the pressure plate, and the vertical axis represents the displacement of the pressure plate.

[0129] Curve fitting is performed on multiple pressure displacement points to obtain the stress compression curve;

[0130] The resistance to external forces is calculated based on the soft ring's hardness, initial thickness, initial diameter, ultimate tensile force, ultimate displacement, and ultimate compressive force. The calculation formula is shown below:

[0131]

[0132] in, For resistance to external forces, The hardness of the soft ring, For the ultimate displacement, and These are the ultimate tensile force and the ultimate compressive force, respectively. and These are the initial diameter and initial thickness, respectively. It is the natural logarithm.

[0133] It should be explained that the hardness tester is a Shore hardness tester. The soft ring hardness refers to the hardness of the O-ring, and the technique of using a pre-constructed hardness tester to test the hardness of the O-ring to obtain the soft ring hardness is existing technology and will not be elaborated here. A tensile testing machine is a device used to perform tensile tests on O-rings, and the tensile testing machine includes: a force sensor, a displacement sensor, a fixing fixture, and a tension rod. The fixing fixture is used to fix the O-ring in the tensile testing machine. The tension rod is a mechanical rod in the tensile testing machine that can stretch the fixed O-ring. The force sensor is used to monitor the tensile force applied by the tension rod when stretching the fixed O-ring. The displacement sensor is used to monitor the displacement of the tension rod when stretching the fixed O-ring. A pressure testing machine is a type of pressure testing machine. The pressure testing bench is a metal platform on the pressure testing machine used to place O-rings. The test pressure plate is a metal disc in the pressure testing machine used to apply pressure to the stabilizing O-rings. It is connected to a hydraulic system or a screw, and the hydraulic system or screw drives the metal disc to apply pressure to the stabilizing O-rings.

[0134] For example, when it is confirmed that one end of the O-ring corresponding to the diameter is fixed on the fixing fixture and the other end is connected to the tension rod of the tensile testing machine, a fixed O-ring is obtained. Then, the tension rod is controlled to move slowly, thereby causing the fixed O-ring to gradually elongate and deform until the fixed O-ring breaks. The tensile force applied to the fixed O-ring by the tension rod monitored by the tension sensor when the fixed O-ring breaks is taken as the ultimate tensile force, and the displacement of the tension rod monitored by the displacement sensor when the fixed O-ring breaks is taken as the ultimate displacement. The stretching of the fixed O-ring by the tension rod of the tensile testing machine is the same as the control of the tension rod to move slowly, thereby causing the fixed O-ring to gradually elongate. If the O-ring is regarded as a cylinder, the initial diameter and initial thickness refer to the diameter of the base circle of the cylinder corresponding to the O-ring and the height of the cylinder, respectively.

[0135] It should be understood that when the O-ring is confirmed to be fixed on the pressure test bench in the pressure testing machine and the test pressure plate just touches the O-ring without applying pressure, the O-ring at this time is the stable O-ring.

[0136] For example, if the pressure timing sequence is {(0.1N, 0s), (0.5N, 0.5s), (1.0N, 1.0s)...(50N, 50s)}, that is, starting from the time the pressure is applied, at 0 seconds, the pressure applied by the experimental pressure plate to the stable O-ring is 0.5N, at 1 second, the pressure applied by the experimental pressure plate to the stable O-ring is 1N, and so on. During the pressure application process, if the monitoring interval is 0.5 seconds, the pressure applied by the experimental pressure plate to the stable O-ring is read every 0.5 seconds to obtain the pressure plate pressure, and the displacement of the experimental pressure plate from the initial position is read to obtain the pressure plate displacement. The pressure plate pressure and pressure plate displacement are summarized to obtain a pressure displacement group until the surface of the stable O-ring cracks. All pressure displacement groups collected during the pressure application process are summarized to obtain multiple pressure displacement groups. Then, the pressure plate pressure with the largest pressure plate pressure among the multiple pressure displacement groups is taken as the ultimate pressure.

[0137] It should be explained that the first coordinate system is a coordinate system with pressure plate pressure as the horizontal axis and pressure plate displacement as the vertical axis. The phrase "identifying multiple pressure displacement points based on multiple pressure displacement groups on the pre-constructed first coordinate system" means mapping each pressure displacement group as a point onto the first coordinate system. The horizontal coordinate of this point represents the pressure plate pressure within the pressure displacement group, and the vertical coordinate represents the pressure plate displacement within the pressure displacement group. This point is thus the pressure displacement point. The phrase "curve fitting of multiple pressure displacement points" means fitting the multiple pressure displacement points into a single curve. Optionally, polynomial fitting can be used as the curve fitting method, and this curve fitting is an existing technique, which will not be elaborated upon here.

[0138] Understandably, the resistance to external force reflects the degree to which the shape of an O-ring changes when subjected to external force; the greater the resistance to external force, the greater the degree to which the shape of the O-ring changes when subjected to external force.

[0139] S3. Perform a friction test on the miniature ferrule connector to obtain the wear resistance index of the lower end, and perform a pressure test on the nitrogen blowing needle to obtain the set of pressure resistance parameters of the needle.

[0140] Specifically, the friction test performed on the miniature ferrule connector to obtain the wear resistance index of the lower end includes:

[0141] A pre-built industrial camera was used to photograph the ferrule ring in the miniature ferrule connector to obtain an image of the ferrule surface;

[0142] The surface finish of the SIM card sleeve is obtained by performing a difference analysis on the surface image of the SIM card sleeve and a pre-constructed standard SIM card sleeve image using a pre-built image difference model.

[0143] Obtain a wear testing machine, wherein the wear testing machine includes: a friction column and a friction holder;

[0144] Confirm the initial mass of the ferrule;

[0145] Based on the aforementioned ferrule and the friction retainer and friction column in the wear testing machine, the fixed alignment ferrule was confirmed;

[0146] The fixed alignment ferrule is rubbed based on the preset friction speed, preset friction time and friction column in the wear tester, and the fixed alignment ferrule is monitored during the friction process using a pre-constructed infrared thermometer and monitoring intervals to obtain the worn ferrule and multiple friction temperatures.

[0147] The highest friction temperature was determined based on multiple friction temperatures, where the highest friction temperature is the largest among the multiple friction temperatures.

[0148] Confirm the wear quality of the worn retaining ring;

[0149] The lower end wear resistance index is calculated based on friction speed, friction time, ferrule surface finish, initial mass, wear mass, and maximum friction temperature. The calculation formula is shown below:

[0150]

[0151] in, The lower end wear resistance index, and These are the initial mass and the wear mass, respectively. For the smoothness of the card sleeve, and These are the friction speed and friction time, respectively. The highest friction temperature, It is the hyperbolic tangent function. It is a natural constant.

[0152] It should be explained that the industrial camera is a type of camera. The ferrule surface image refers to an image of the ferrule ring surface. The standard ferrule image is an image pre-taken by workers at a positive pressure nitrogen blowing machine manufacturing plant of a cleaned, smooth, and qualified ferrule ring. The image difference model is a convolutional neural network, and its main operating principle is as follows: First, the convolutional neural network is used to process the ferrule surface image and the standard ferrule image through multi-layer convolution, pooling, and activation functions to obtain two feature vectors. Then, the cosine similarity between the two feature vectors is calculated. This cosine similarity is the ferrule surface finish. The above process is a publicly available technical solution, and this embodiment of the invention will not be repeated here. The ferrule surface finish reflects the roughness of the ferrule ring surface; the greater the ferrule surface finish, the lower the roughness of the ferrule ring surface. The wear testing machine is a friction and wear testing machine. The wear testing machine includes: a friction column and a friction retainer. The friction column is a cylindrical metal element used in the wear testing machine to rub the fixed and aligned ferrule ring. The friction retainer is a clamp used to fix the ferrule ring.

[0153] It is understood that the determination of a fixedly aligned ferrule based on the ferrule and the friction retainer and friction column in the wear testing machine means that when the ferrule is confirmed to be fixed on the friction retainer and the direction of the ferrule's center of gravity pointing towards the center of gravity of the friction column is perpendicular to the ground, that is, when the ferrule and the friction column are directly aligned, the ferrule at this time is the fixedly aligned ferrule. An infrared thermometer is a type of infrared thermometer.

[0154] For example, if the preset friction speed is 600 rpm (rpm is the number of rotations per minute) and the friction time is 3 minutes, then the friction column in the wear testing machine rubs the fixed alignment ferrule at a speed of 600 rpm. If the monitoring interval is 1 second, then the surface temperature of the fixed alignment ferrule is monitored every second using an infrared thermometer to obtain the friction temperature. This continues until the total friction time reaches 3 minutes, at which point the friction column stops. The fixed alignment ferrule after friction is then the worn ferrule. The friction temperatures collected during the friction process are summarized to obtain multiple friction temperatures. Initial mass refers to the mass of the ferrule. Wear mass refers to the mass of the worn ferrule.

[0155] Understandably, the lower end wear resistance index reflects the wear resistance of the ferrule ring; the higher the lower end wear resistance index, the stronger the wear resistance of the ferrule ring.

[0156] Specifically, the pressure test performed on the nitrogen blowing nozzle to obtain a set of nozzle pressure resistance parameters includes:

[0157] Confirm the outer diameter and wall thickness of the nitrogen blowing needle;

[0158] Obtain a material testing machine, wherein the material testing machine includes: a shearing platform and shearing blades;

[0159] The nitrogen blowing nozzle is fixed on the shearing platform of the material testing machine to obtain a fixed nozzle;

[0160] Based on the preset shearing force timing and shearing blade, the fixed nozzle is sheared, and the current shearing force of the shearing blade on the fixed nozzle is monitored in real time until the fixed nozzle breaks. The current shearing force monitored when the fixed nozzle breaks is taken as the ultimate shearing force.

[0161] By summarizing the outer diameter of the blow needle, the needle wall thickness, and the ultimate shear force, a set of pressure resistance parameters for the blow needle is obtained.

[0162] It should be explained that the outer diameter of the nitrogen blowing needle refers to the outer diameter of the cross-section of the nitrogen blowing needle, and the needle wall thickness refers to the thickness of the metal wall between the outer and inner diameters of the nitrogen blowing needle. The material testing machine is a universal material testing machine, an experimental device used to test the mechanical properties of materials under external forces. It can perform mechanical tests such as tensile, compression, bending, and shearing. In this embodiment of the invention, the material testing machine is used as a shearing testing machine. The shearing platform is a platform in the material testing machine used to fix the nitrogen blowing needle and provide load-bearing and support for subsequent shearing operations. The shearing blade is a blade on the material testing machine used to apply shearing force to the fixed needle. It directly contacts the fixed needle and generates shear failure by applying shearing force to the fixed needle.

[0163] For example, if the shear force sequence is {(0.2N, 1s), (0.4N, 2s), (0.6N, 3s)...(2N, 10s)}, that is, starting from the application of shear force, at 1 second, the shear force applied by the shear blade to the fixed nozzle is 0.2N, at 2 seconds, the shear force applied by the shear blade to the fixed nozzle is 0.4N, and so on. During the application of shear force, the shear force applied by the shear blade to the fixed nozzle is monitored in real time by the force value acquisition unit built into the material testing machine until the fixed nozzle breaks instantaneously. The shear force monitored when the fixed nozzle breaks is taken as the ultimate shear force.

[0164] S4. Calculate the upper assembly torque based on the external force resistance and the force compression curve.

[0165] In detail, the calculation of the upper assembly torque based on the external force resistance and the force compression curve includes:

[0166] The target compressive displacement is calculated based on the external force resistance, using the following formula:

[0167]

[0168] in, For the target compression displacement, For resistance to external forces, The preset reference resistance, This is the preset reference compression displacement;

[0169] The target compression point is identified in the force-compression curve based on the target compression displacement, wherein the target compression point is located on the force-compression curve and the vertical coordinate of the target compression point in the first coordinate system is the target compression displacement;

[0170] The target compression pressure is determined based on the target compression point, where the target compression pressure is the abscissa of the target compression point in the first coordinate system;

[0171] Confirm the outer diameter of the upper thread and the upper friction coefficient of the miniature ferrule connector;

[0172] The upper assembly torque is calculated based on the target compression pressure, the outer diameter of the upper thread, and the upper friction coefficient. The calculation formula is as follows:

[0173]

[0174] in, For the upper part to be equipped with torque, To compress the pressure to the target, The outer diameter of the upper thread. The coefficient of friction is the upper end.

[0175] It should be understood that, to ensure the airtightness between the gas distribution end and the upper interface of the positive pressure nitrogen evaporator, an O-ring must be installed between the two interfaces during assembly. This is achieved by continuously screwing the gas distribution thread outlet of the gas distribution end into the upper interface, causing the O-ring to be continuously compressed during the screwing process. The target compression displacement is the ideal thickness compression amount required to ensure the sealing performance meets the standards, i.e., the length by which the O-ring thickness is compressed.

[0176] It should be explained that the reference resistance and reference compression displacement are both manually set by the staff of the positive pressure nitrogen blowing machine manufacturing plant based on historical data. For example, the average value of multiple external force resistances corresponding to multiple qualified positive pressure nitrogen blowing machines produced in the past is used as the reference resistance, and the average value of the thickness compression of multiple O-rings corresponding to multiple qualified positive pressure nitrogen blowing machines produced in the past is used as the reference compression displacement.

[0177] It is understood that the outer diameter of the upper thread refers to the diameter of the circle enclosed by the threads in the upper interface of the miniature ferrule connector. The upper friction coefficient refers to the friction coefficient of the thread surface in the upper interface of the miniature ferrule connector. The upper assembly torque refers to the torque value applied to the torque wrench when screwing the upper interface of the miniature ferrule connector into the gas distribution thread outlet of the gas distribution end to ensure the airtightness between the gas distribution end and the upper interface of the positive pressure nitrogen blower, and is used to control the tightening force of the threads.

[0178] S5. Using the pre-built assembly model, the assembly parameters of the lower end wear resistance index and the needle pressure resistance parameter set are predicted to obtain the lower end assembly torque.

[0179] It should be explained that the assembly model is a deep learning model pre-trained by the staff of the positive pressure nitrogen blowing machine manufacturing plant. The training process is as follows: First, the lower end assembly torque of several different types of positive pressure nitrogen blowing machines that have been successfully manufactured in the past is collected, and the lower end wear resistance index and nozzle pressure resistance parameter set corresponding to the lower end assembly torque are identified. The lower end wear resistance index and nozzle pressure resistance parameter set, including the nozzle outer diameter, nozzle wall thickness, and ultimate shear force, are used as input data for training samples. The lower end assembly torque corresponding to the input data is used as output data for training samples. The training samples corresponding to several different types of positive pressure nitrogen blowing machines are summarized to obtain a training sample set. Based on the training sample set, the model is iteratively trained using deep neural networks or other applicable deep learning algorithms (such as multilayer perceptrons, convolutional neural networks, graph neural networks, etc.). The model gradually adjusts the network parameters by optimizing the loss function (such as mean square error, weighted error, etc.) so that the model can learn the mapping relationship between (lower end wear resistance index and nozzle pressure resistance parameter set) and (lower end assembly torque). After training, when the new lower end wear resistance index and nozzle pressure resistance parameter set are input into the model, the model can automatically predict and output the optimal lower end assembly torque. The above process is all publicly available prior art, and the embodiments of the present invention will not be described in detail here.

[0180] It is understandable that the process of using a pre-built assembly model to predict assembly parameters for the lower end wear resistance index and the nozzle pressure resistance parameter set, and obtaining the lower end assembly torque, means that the lower end wear resistance index and the nozzle pressure resistance parameter set are input into the assembly model, and the output of the assembly model is used as the lower end assembly torque.

[0181] S6. Based on the upper assembly torque, lower assembly torque and torque wrench, the nitrogen blowing assembly, micro ferrule, O-ring and nitrogen blowing needle are stably assembled to obtain the positive pressure nitrogen blowing device.

[0182] In detail, the positive pressure nitrogen blowing device is obtained by stably assembling the nitrogen blowing assembly, micro ferrule connector, O-ring, and nitrogen blowing needle based on the upper assembly torque, lower assembly torque, and torque wrench.

[0183] Input the lower end assembly torque into the torque wrench to obtain the lower end wrench;

[0184] Based on the preset installation depth, the nitrogen blowing needle is inserted into the lower interface of the micro ferrule connector, and the nut of the micro ferrule connector is tightened with the lower wrench to obtain a ferrule connector with a needle.

[0185] Insert the O-ring into the annular sealing groove at the upper interface of the pin-type ferrule connector to obtain the ferrule connector.

[0186] Perform the following operation on each of the multiple gas distributors in the distribution manifold:

[0187] Input the upper assembly torque into the torque wrench to obtain the upper wrench;

[0188] Use the upper wrench to screw the gas distribution thread outlet of the gas distribution end to the upper interface of the waiting ferrule connector to obtain the initial connection end;

[0189] By summing the initial connection points, multiple initial connection points are obtained;

[0190] Multiple initial connection ends are fixed to multiple fixing holes on the nozzle fixing seat to obtain multiple fixed connection ends, wherein each fixed connection end corresponds to a fixing hole.

[0191] The connection and distribution manifold was identified based on multiple fixed connection ends and distribution manifolds;

[0192] Connect the main air inlet of the distribution manifold to the regulating air outlet of the pressure regulating valve, and connect the nitrogen inlet pipe of the nitrogen blowing assembly to the regulating air inlet of the pressure regulating valve to obtain a positive pressure nitrogen blowing device.

[0193] It should be explained that the lower wrench is a torque wrench whose output torque is set to the lower assembly torque. The upper wrench is a torque wrench whose output torque is set to the upper assembly torque.

[0194] For example, if the installation depth is 5cm, one end of the nitrogen blow needle is inserted into the lower interface of the micro ferrule connector through the nut. When the insertion depth reaches 5cm, the nut is tightened using the lower wrench, causing the ferrule ring to radially contract and tightly clamp the nitrogen blow needle. The micro ferrule connector clamping the nitrogen blow needle at this point is the needle-equipped ferrule connector. The ferrule connector is then fitted with an O-ring and becomes a needle-equipped ferrule connector.

[0195] Understandably, the step of using the upper wrench to screw the gas distribution thread outlet of the gas distributor end to the upper interface of the waiting ferrule connector to obtain the initial connection end means: using the upper wrench, aligning the gas distribution thread outlet of the gas distributor end with the threaded hole of the upper interface, and screwing the gas distribution thread outlet of the gas distributor end into the interface along the thread direction, while applying compression force to the O-ring installed between the interfaces during the screwing process until a stable threaded connection is formed. Thus, a reliable airtight connection is achieved through the stability of the threaded connection and the sealing compression of the O-ring. The initial connection end is the gas distributor end after being connected to the waiting ferrule connector.

[0196] It should be understood that since the number of initial connection ends equals the number of fixing holes, fixing multiple initial connection ends to multiple fixing holes of the nozzle holder means: sequentially extracting initial connection ends from multiple initial connection ends, inserting the extracted initial connection ends into the corresponding fixing holes and fixing them, thus obtaining fixed connection ends, until all initial connection ends are inserted and fixed in the fixing holes, and then summing the fixed connection ends to obtain multiple fixed connection ends. Identifying the connecting distribution manifold based on multiple fixed connection ends and the distribution manifold means: when it is confirmed that multiple air distribution ends in the distribution manifold are converted into multiple fixed connection ends, the distribution manifold at this time is the connecting distribution manifold.

[0197] It is understood that when the main air inlet of the connecting manifold is connected to the regulating air outlet of the pressure regulating valve and the nitrogen inlet pipe of the nitrogen blowing assembly is connected to the regulating air inlet of the pressure regulating valve, the connecting manifold, the pressure regulating valve and the nitrogen inlet pipe together constitute the positive pressure nitrogen blowing device, which is the positive pressure nitrogen meter required to be assembled in the embodiment of the present invention.

[0198] It should be understood that, by analyzing the physical properties of O-rings, micro-ferrule connectors and nitrogen blowing needles, and combining them with historical assembly data, the embodiments of the present invention calculate the optimal upper and lower assembly torques required during the assembly of the positive pressure nitrogen blowing assembly, thereby improving the reliability of the assembly process and enhancing the airtightness of the assembled positive pressure nitrogen blowing device.

[0199] S7. Perform an airtightness test on the positive pressure nitrogen blowing device to obtain the overall stability.

[0200] In detail, the airtightness test of the positive pressure nitrogen blowing device to obtain the overall stability includes:

[0201] Obtain leak detection fluid and a brush;

[0202] Confirm the multiple upper and lower connection points of the positive pressure nitrogen blowing device, wherein each upper and lower connection point corresponds one-to-one with the fixed connection end;

[0203] Perform the following operation at each of the multiple upper connection points in the positive pressure nitrogen blowing device:

[0204] Use a brush to apply leak detection fluid to the upper connection point to cover the connection point;

[0205] An industrial camera was used to photograph the cover joint to obtain an image of the covered liquid;

[0206] Start the positive pressure nitrogen blowing device, and identify the operating connection point based on the positive pressure nitrogen blowing device and the cover connection point after startup;

[0207] An industrial camera is used to photograph the connection points to obtain images of the liquid in operation;

[0208] The difference in the liquid level was determined based on the image difference model, the covered liquid image, and the running liquid image.

[0209] Summarize the differences in the loading solution to obtain multiple differences in the loading solution;

[0210] Based on leak detection fluid, brush, positive pressure nitrogen blowing device, multiple lower end connections, industrial camera and image difference model, multiple lower fluid differences were identified.

[0211] The overall stability is calculated based on multiple differences in the upper and lower liquids, using the following formula:

[0212]

[0213] in, For overall stability, The first of multiple liquid difference Individual differences in liquid content The first of multiple lower fluid differences Individual differences in fluid composition This represents the number of upper liquid differences among multiple upper liquid differences.

[0214] It should be explained that leak detection fluid is a liquid used to test airtightness or sealing performance. It is applied to the surface of the connection or seal being tested, forming a film. When the airtightness is insufficient, bubbles or obvious reactions can be observed on the film surface, thus indicating a leak. Optionally, CYLC-1 gas leak detection reagent from Shanghai Gaozhi Precision Instruments Co., Ltd. can be used as the leak detection fluid.

[0215] Understandably, the upper connection refers to the position where the gas distribution end of the manifold in the positive pressure nitrogen blowing device connects to the upper interface of the waiting ferrule connector. The lower connection refers to the position where the nitrogen blowing needle in the positive pressure nitrogen blowing device connects to the lower interface of the micro ferrule connector. The number of upper and lower connections is equal to the number of gas distribution ends in the positive pressure nitrogen blowing device. The covered connection refers to the upper connection that has been coated. The covered liquid image refers to the image of the surface of the covered connection. The confirmation of the operating connection based on the positive pressure nitrogen blowing device after startup and the covered connection means that when it is confirmed that the positive pressure nitrogen blowing device after startup is blowing nitrogen outward through its internal nitrogen blowing needle, the covered connection on the positive pressure nitrogen blowing device at this time is the operating connection.

[0216] It should be understood that the method of using an industrial camera to photograph the running connection to obtain an image of the running liquid is the same as the method of using an industrial camera to photograph the covering connection to obtain an image of the covering liquid, and will not be repeated here. The method of determining the liquid difference degree based on the image difference model, the covering liquid image, and the running liquid image refers to: first, using a convolutional neural network to process the covering liquid image and the running liquid image through multiple convolutions, pooling, and activation functions to obtain two feature vectors; then, calculating the cosine similarity between the two feature vectors; and finally, calculating the absolute difference between the cosine similarity and 1. This absolute difference is the liquid difference degree. The method of determining multiple liquid differences based on leak detection fluid, brushes, positive pressure nitrogen blowing devices, multiple lower connection points, industrial cameras, and image difference models is the same as the method of determining multiple liquid differences using leak detection fluid, brushes, positive pressure nitrogen blowing devices, multiple upper connection points, industrial cameras, and image difference models, and will not be repeated here.

[0217] Understandably, the overall stability reflects the airtightness of the positive pressure nitrogen blowing device during operation. The greater the overall stability, the higher the airtightness of the positive pressure nitrogen blowing device during operation, and the less likely it is to leak.

[0218] S8. Compare the overall stability with the preset stability threshold. If the overall stability is less than the stability threshold, perform pinhole fine-tuning on the positive pressure nitrogen blowing device to obtain a new nitrogen blowing device. Use the new nitrogen blowing device as the positive pressure nitrogen blowing device and return to the step of performing airtightness testing on the positive pressure nitrogen blowing device until the overall stability is greater than or equal to the stability threshold. If the overall stability is greater than or equal to the stability threshold, use the positive pressure nitrogen blowing device as the stable nitrogen blowing device to complete the stable assembly of the positive pressure nitrogen blowing component.

[0219] It should be explained that the stability threshold is set manually by the staff of the positive pressure nitrogen evaporator manufacturing plant based on historical data. For example, the average of the comprehensive stability of multiple qualified positive pressure nitrogen evaporators produced in the past is used as the stability threshold.

[0220] Specifically, the pinhole fine-tuning of the positive pressure nitrogen blowing device to obtain a new nitrogen blowing device includes:

[0221] For each of the multiple liquid loading differences, perform the following operation:

[0222] Compare the upper liquid difference with the preset difference threshold. If the upper liquid difference is greater than the difference threshold, the upper connection point corresponding to the upper liquid difference is regarded as an abnormal upper connection point. The upper fine-tuning torque is calculated based on the upper liquid difference, the difference threshold, and the upper assembly torque. The calculation formula is as follows:

[0223]

[0224] in, For fine-tuning the torque at the upper end, For the difference in the upper liquid, The difference threshold, Refers to taking the absolute value;

[0225] Disassemble the abnormal upper connection to obtain the disassembled upper connection, confirm the position of the O-ring at the disassembled upper connection, and obtain the used O-ring at the O-ring position;

[0226] Determine whether the used O-ring is in a broken state. If the used O-ring is in a broken state, subtract the upper fine-tuning torque from the upper assembly torque to obtain the optimized upper torque.

[0227] If the O-ring is not broken, add the upper assembly torque to the upper fine-tuning torque to obtain the optimized upper torque;

[0228] Based on the optimized upper torque and torque wrench, the optimized upper wrench is identified. The O-ring is placed in the O-ring position of the disassembled upper connection to obtain the updated disassembled upper part. The optimized upper wrench is used to screw the updated disassembled upper part to obtain a stable upper connection.

[0229] If the difference in the upper liquid is less than or equal to the difference threshold, then the upper connection point corresponding to the difference in the upper liquid is taken as the stable upper connection point.

[0230] By summing up the stable upper connection points, multiple stable upper connection points are obtained;

[0231] For each of the multiple fluid difference rates, perform the following operation:

[0232] Compare the lower liquid difference degree with the difference threshold. If the lower liquid difference degree is greater than the difference threshold, the lower connection point corresponding to the lower liquid difference degree is regarded as the abnormal lower connection point. The lower fine-tuning torque is obtained based on the lower liquid difference degree, the difference threshold and the lower assembly torque.

[0233] Disassemble the abnormal lower connection to obtain the disassembled lower connection and the used spray needle;

[0234] Determine if there are cracks in the used spray needle. If there are cracks in the used spray needle, subtract the lower end fine-tuning torque from the lower end assembly torque to obtain the optimized lower end torque.

[0235] If there are no cracks after using the spray needle, add the lower end assembly torque and the lower end fine-tuning torque to obtain the optimized lower end torque;

[0236] Based on optimizing the lower torque and obtaining the optimized lower wrench;

[0237] Based on the installation depth, the nitrogen blowing needle is inserted into the lower interface of the disassembly lower connection, and the nut of the miniature ferrule connector at the disassembly lower connection is tightened using an optimized lower wrench to obtain a stable lower connection.

[0238] By summarizing the stable lower connection points, multiple stable lower connection points are obtained;

[0239] Based on multiple stable upper connection points, multiple stable lower connection points, and the positive pressure nitrogen blowing device, the replacement nitrogen blowing device was identified.

[0240] It should be explained that the difference threshold is a value set manually by the staff of the positive pressure nitrogen blowing device manufacturing plant, preferably 0.3. Disassembling the abnormal upper connection refers to rotating the gas distribution end connected to the abnormal upper connection to the upper interface of the waiting ferrule connector to separate them, thus disengaging the threads. The abnormal upper connection that has been disengaged is the disassembled upper connection. The O-ring position refers to the location of the annular sealing groove corresponding to the disassembled upper connection. Obtaining the used O-ring at the O-ring position means retrieving the O-ring inserted during the previous assembly process from the O-ring position; this O-ring is the used O-ring.

[0241] It is understood that the method for determining the optimized upper end wrench based on the optimized upper end torque and torque wrench is the same as the method for inputting the upper end assembly torque into the torque wrench to obtain the upper end wrench, and will not be repeated here. The method of using the optimized upper end wrench to screw the upper end of the replacement disassembly to obtain a stable upper end connection refers to: using the optimized upper end wrench to screw the air distribution end on the upper end of the replacement disassembly to the upper interface of the waiting ferrule connector. The method of using the optimized upper end wrench to screw the air distribution end on the upper end of the replacement disassembly to the upper interface of the waiting ferrule connector is the same as the method of using the upper end wrench to screw the air distribution thread outlet of the air distribution end to the upper interface of the waiting ferrule connector, and will not be repeated here. The stable upper end connection is the upper end of the replacement disassembly after the screwing is completed.

[0242] It should be explained that the method for obtaining the lower end fine-tuning torque based on the difference degree of the lower liquid, the difference threshold, and the lower end assembly torque is the same as the method for calculating the upper end fine-tuning torque based on the difference degree of the upper liquid, the difference threshold, and the upper end assembly torque, and will not be repeated here.

[0243] Understandably, disassembling the abnormal lower connection to obtain the disassembled lower connection and the used nozzle refers to: rotating the nitrogen blow nozzle connected to the abnormal lower connection and the lower interface of the micro ferrule connector to separate them, thus disengaging the threads. The abnormal lower connection that has been disengaged is the disassembled lower connection, and the nitrogen blow nozzle after disengaging the threads is the used nozzle. The method of obtaining the optimized lower torque and torque wrench is the same as the method of inputting the upper assembly torque into the torque wrench to obtain the upper wrench, and will not be repeated here. The method of inserting the nitrogen blow nozzle into the lower interface of the disassembled lower connection based on the installation depth and tightening the nut of the micro ferrule connector at the disassembled lower connection using the optimized lower wrench is the same as the method of inserting the nitrogen blow nozzle into the lower interface of the micro ferrule connector based on the preset installation depth and tightening the nut of the micro ferrule connector using the lower wrench, and will not be repeated here. The stable lower connection is the disassembled lower connection where a new nitrogen blowing needle has been reinserted and tightened.

[0244] It should be understood that the confirmation of the updated nitrogen blowing device based on multiple stable upper connection points, multiple stable lower connection points, and positive pressure nitrogen blowing device means that when it is confirmed that multiple upper connection points of the positive pressure nitrogen blowing device are converted into multiple stable upper connection points and multiple lower connection points of the positive pressure nitrogen blowing device are converted into multiple stable lower connection points, the positive pressure nitrogen blowing device at this time is the updated nitrogen blowing device.

[0245] It should be understood that when an O-ring is broken, it indicates that excessive torque caused the O-ring to break, leading to air leakage. Therefore, the upper assembly torque should be slightly reduced. When the O-ring is not broken, the leakage is not caused by a broken O-ring, but by a loose upper connection. Therefore, the upper assembly torque should be slightly increased. Similarly, when the spray needle has cracks, it indicates that excessive torque caused the needle to break, leading to air leakage. Therefore, the lower assembly torque should be slightly reduced. When the spray needle does not have cracks, the leakage is likely due to a loose lower connection. Therefore, the lower assembly torque should be slightly increased.

[0246] Understandably, the embodiments of the present invention determine the optimal upper and lower assembly torques by analyzing the physical properties of each component of the positive pressure nitrogen blowing device, and perform pinhole fine-tuning of the positive pressure nitrogen blowing device through subsequent airtightness testing. The torque is applied without manual force throughout the process, which greatly improves the stability and reliability of the positive pressure nitrogen blowing component assembly process.

[0247] To address the problems described in the background art, this invention receives component assembly instructions and identifies the component assembly environment based on these instructions. The component assembly environment includes: a torque wrench, a nitrogen blowing assembly set, a miniature ferrule connector, an O-ring, and a nitrogen blowing needle. This invention, by identifying the component assembly environment, recognizes the required components and tools, achieving standardization and process streamlining of the assembly environment. This provides a foundation for subsequent automated assembly, reduces manual configuration errors, and allows for performance characteristic extraction of the O-ring to obtain its external force resistance and compression curve. Furthermore, friction testing is performed on the miniature ferrule connector to obtain its lower end wear resistance index. Pressure tests were performed on the nitrogen blowing needle to obtain a set of needle pressure resistance parameters. It is evident that this embodiment of the invention tests the physical properties of the O-ring, micro-ferrule connector, and nitrogen blowing needle, facilitating the subsequent confirmation of a reasonable assembly torque based on these physical properties, thereby improving the automation and reliability of the assembly process. The upper assembly torque is calculated based on the external force resistance and the force compression curve. Using a pre-constructed assembly model, the lower end wear resistance index and the needle pressure resistance parameter set are used to predict the assembly parameters, resulting in the lower end assembly torque. It is clear that this embodiment of the invention predicts the ideal assembly torque by referring to historical data and physical properties, improving the assembly of positive pressure nitrogen blowing components. To improve the reliability and airtightness of the assembled product, the nitrogen blowing assembly, micro-ferrule connector, O-ring, and nitrogen blowing needle are stably assembled using the upper and lower assembly torques and a torque wrench, resulting in a positive pressure nitrogen blowing device. An airtightness test is then performed on the positive pressure nitrogen blowing device to obtain its overall stability. This invention demonstrates that by using a predetermined torque, fully controllable automated assembly is achieved, ensuring optimal airtightness at each connection point, improving overall assembly reliability and automation. Furthermore, by conducting an airtightness test on the positive pressure nitrogen blowing device, leakage defects are automatically detected, improving the consistency and quality controllability of the assembled product. The overall stability is compared with the preset value. If the overall stability is less than the stability threshold, the positive pressure nitrogen blowing device is fine-tuned via pinholes to obtain a new nitrogen blowing device. This new nitrogen blowing device is then used as the positive pressure nitrogen blowing device, and the process of performing an airtightness test on the positive pressure nitrogen blowing device is repeated until the overall stability is greater than or equal to the stability threshold. If the overall stability is greater than or equal to the stability threshold, the positive pressure nitrogen blowing device is then used as the stable nitrogen blowing device, completing the stable assembly of the positive pressure nitrogen blowing assembly. It can be seen that this embodiment of the invention automatically performs pinhole fine-tuning on the positive pressure nitrogen blowing device through overall stability and a stability threshold, improving the automation level of the positive pressure nitrogen blowing assembly and enhancing the airtightness of the assembled product. Therefore, this invention can improve the automation level and reliability of assembling positive pressure nitrogen blowing components and enhance the airtightness of the assembled product.

[0248] like Figure 2 The diagram shown is a functional block diagram of a stable assembly system for a positive pressure nitrogen blowing assembly provided in an embodiment of the present invention.

[0249] The stable assembly system 100 for positive pressure nitrogen blowing components described in this invention can be installed in an electronic device. Depending on the functions implemented, the stable assembly system 100 for positive pressure nitrogen blowing components may include an assembly environment verification module 101, a component property analysis module 102, an assembly parameter verification module 103, and a nitrogen blowing device calibration module 104. The module described in this invention can also be referred to as a unit, which refers to a series of computer program segments that can be executed by the processor of an electronic device and can perform a fixed function, and which are stored in the memory of the electronic device.

[0250] The assembly environment confirmation module 101 is used to receive component assembly instructions and confirm the component assembly environment based on the component assembly instructions. The component assembly environment includes: torque wrench, nitrogen blowing component set, micro ferrule connector, O-ring and nitrogen blowing needle.

[0251] The component property analysis module 102 is used to extract performance characteristics of O-rings to obtain external force resistance and force compression curves, perform friction tests on micro ferrule joints to obtain the lower end wear resistance index, and perform pressure tests on nitrogen blowing needles to obtain a set of needle pressure resistance parameters.

[0252] The assembly parameter confirmation module 103 is used to calculate the upper assembly torque based on the external force resistance and the force compression curve, predict the assembly parameters of the lower wear index and the nozzle pressure resistance parameter set using the pre-constructed assembly model, obtain the lower assembly torque, and perform stable assembly of the nitrogen blowing assembly set, micro ferrule joint, O-ring and nitrogen blowing nozzle based on the upper assembly torque, the lower assembly torque and the torque wrench, to obtain the positive pressure nitrogen blowing device.

[0253] The nitrogen blowing device calibration module 104 is used to perform an airtightness test on the positive pressure nitrogen blowing device to obtain the overall stability. The overall stability is compared with a preset stability threshold. If the overall stability is less than the stability threshold, the positive pressure nitrogen blowing device is finely adjusted by a pinhole to obtain a new nitrogen blowing device. The new nitrogen blowing device is used as the positive pressure nitrogen blowing device, and the process of performing an airtightness test on the positive pressure nitrogen blowing device is repeated until the overall stability is greater than or equal to the stability threshold. If the overall stability is greater than or equal to the stability threshold, the positive pressure nitrogen blowing device is used as the stable nitrogen blowing device, and the stable assembly of the positive pressure nitrogen blowing component is completed.

[0254] In detail, the modules in the stable assembly system 100 for positive pressure nitrogen blowing components described in this embodiment of the invention employ the same methods as described above during use. Figure 1 The method used is the same as the stable assembly method for positive pressure nitrogen blowing components described in the previous section, and can produce the same technical effect, so it will not be repeated here.

[0255] like Figure 3The diagram shown is a structural schematic of an electronic device that implements a stable assembly method for a positive pressure nitrogen blowing assembly, according to an embodiment of the present invention.

[0256] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a stable assembly method program for a positive pressure nitrogen blowing assembly.

[0257] The memory 11 includes at least one type of readable storage medium, such as flash memory, portable hard drive, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of the electronic device 1, such as a portable hard drive. In other embodiments, the memory 11 can be an external storage device of the electronic device 1, such as a plug-in portable hard drive, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the electronic device 1. Furthermore, the memory 11 includes both internal storage units and external storage devices of the electronic device 1. The memory 11 can be used not only to store application software and various types of data installed on the electronic device 1, such as code for a stable assembly method program for a positive pressure nitrogen blowing assembly, but also to temporarily store data that has been output or will be output.

[0258] In some embodiments, the processor 10 may be composed of integrated circuits, such as a single packaged integrated circuit or multiple integrated circuits with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 10 is the control unit of the electronic device, connecting various components of the entire electronic device via various interfaces and lines. It executes programs or modules stored in the memory 11 (e.g., a stable assembly method program for a positive pressure nitrogen blowing assembly) and calls data stored in the memory 11 to perform various functions of the electronic device 1 and process data.

[0259] The bus 12 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 can be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to realize the connection and communication between the memory 11 and at least one processor 10, etc.

[0260] Figure 3 Only electronic devices with components are shown; it will be understood by those skilled in the art that... Figure 3 The structure shown does not constitute a limitation on the electronic device 1, and may include fewer or more components than shown, or combine certain components, or have different component arrangements.

[0261] For example, although not shown, the electronic device 1 may also include a power supply (such as a battery) to power the various components. Preferably, the power supply can be logically connected to the at least one processor 10 through a power management device, thereby enabling functions such as charging management, discharging management, and power consumption management. The power supply may also include one or more DC or AC power supplies, recharging devices, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components. The electronic device 1 may also include various sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be described in detail here.

[0262] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a Wi-Fi interface, a Bluetooth interface, etc.), which is typically used to establish communication connections between the electronic device 1 and other electronic devices.

[0263] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), and optionally, a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen, etc. The display may also be appropriately referred to as a screen or display unit, used to display information processed in the electronic device 1 and to display a visual user interface.

[0264] The stable assembly method program for the positive pressure nitrogen blowing assembly stored in the memory 11 of the electronic device 1 is a combination of multiple instructions, which, when run in the processor 10, can achieve the following:

[0265] Receive component assembly instructions, and confirm the component assembly environment based on the component assembly instructions. The component assembly environment includes: torque wrench, nitrogen blow assembly set, miniature ferrule connector, O-ring and nitrogen blow needle.

[0266] The performance characteristics of the O-rings were extracted to obtain their resistance to external forces and their compression curves.

[0267] Friction tests were conducted on the miniature ferrule connector to obtain the wear resistance index of the lower end, and pressure tests were conducted on the nitrogen blowing needle to obtain the set of pressure resistance parameters of the needle.

[0268] The upper assembly torque is calculated based on the external force resistance and the force compression curve.

[0269] The assembly parameters of the lower end are predicted by using a pre-built assembly model to predict the wear resistance index and the pressure resistance parameter set of the nozzle, and the assembly torque of the lower end is obtained.

[0270] Based on the upper assembly torque, lower assembly torque and torque wrench, the nitrogen blowing assembly, micro ferrule, O-ring and nitrogen blowing needle are stably assembled to obtain a positive pressure nitrogen blowing device.

[0271] An airtightness test was performed on the positive pressure nitrogen blowing device to obtain its overall stability.

[0272] Compare the overall stability with the preset stability threshold. If the overall stability is less than the stability threshold, perform pinhole fine-tuning on the positive pressure nitrogen blowing device to obtain a new nitrogen blowing device. Use the new nitrogen blowing device as the positive pressure nitrogen blowing device and return to the step of performing airtightness testing on the positive pressure nitrogen blowing device until the overall stability is greater than or equal to the stability threshold.

[0273] If the overall stability is greater than or equal to the stability threshold, the positive pressure nitrogen blowing device is used as a stable nitrogen blowing device to complete the stable assembly of the positive pressure nitrogen blowing component.

[0274] Specifically, the processor 10's implementation method for the above instructions can be found in [reference needed]. Figures 1 to 3 The descriptions of the relevant steps in the corresponding embodiments are not repeated here.

[0275] Furthermore, if the modules / units integrated in the electronic device 1 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, or a read-only memory (ROM).

[0276] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor of an electronic device, can perform the following:

[0277] Receive component assembly instructions, and confirm the component assembly environment based on the component assembly instructions. The component assembly environment includes: torque wrench, nitrogen blow assembly set, miniature ferrule connector, O-ring and nitrogen blow needle.

[0278] The performance characteristics of the O-rings were extracted to obtain their resistance to external forces and their compression curves.

[0279] Friction tests were conducted on the miniature ferrule connector to obtain the wear resistance index of the lower end, and pressure tests were conducted on the nitrogen blowing needle to obtain the set of pressure resistance parameters of the needle.

[0280] The upper assembly torque is calculated based on the external force resistance and the force compression curve.

[0281] The assembly parameters of the lower end are predicted by using a pre-built assembly model to predict the wear resistance index and the pressure resistance parameter set of the nozzle, and the assembly torque of the lower end is obtained.

[0282] Based on the upper assembly torque, lower assembly torque and torque wrench, the nitrogen blowing assembly, micro ferrule, O-ring and nitrogen blowing needle are stably assembled to obtain a positive pressure nitrogen blowing device.

[0283] An airtightness test was performed on the positive pressure nitrogen blowing device to obtain its overall stability.

[0284] Compare the overall stability with the preset stability threshold. If the overall stability is less than the stability threshold, perform pinhole fine-tuning on the positive pressure nitrogen blowing device to obtain a new nitrogen blowing device. Use the new nitrogen blowing device as the positive pressure nitrogen blowing device and return to the step of performing airtightness testing on the positive pressure nitrogen blowing device until the overall stability is greater than or equal to the stability threshold.

[0285] If the overall stability is greater than or equal to the stability threshold, the positive pressure nitrogen blowing device is used as a stable nitrogen blowing device to complete the stable assembly of the positive pressure nitrogen blowing component.

[0286] In the embodiments provided by this invention, it should be understood that the disclosed devices, systems, and methods can be implemented in other ways. For example, the system embodiments described above are merely illustrative, and actual implementations may have other classification methods.

[0287] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0288] Furthermore, the functional modules in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional modules.

[0289] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0290] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A stable assembly method for a positive pressure nitrogen blowing assembly, characterized in that, The method includes: Receive component assembly instructions, and confirm the component assembly environment based on the component assembly instructions. The component assembly environment includes: torque wrench, nitrogen blow assembly set, miniature ferrule connector, O-ring and nitrogen blow needle. The performance characteristics of the O-rings were extracted to obtain their resistance to external forces and their compression curves. Friction tests were conducted on the miniature ferrule connector to obtain the wear resistance index of the lower end, and pressure tests were conducted on the nitrogen blowing needle to obtain the set of pressure resistance parameters of the needle. The upper assembly torque is calculated based on the external force resistance and the force compression curve. The assembly parameters of the lower end are predicted by using a pre-built assembly model to predict the wear resistance index and the pressure resistance parameter set of the nozzle, and the assembly torque of the lower end is obtained. Based on the upper assembly torque, lower assembly torque and torque wrench, the nitrogen blowing assembly, micro ferrule, O-ring and nitrogen blowing needle are stably assembled to obtain a positive pressure nitrogen blowing device. An airtightness test was performed on the positive pressure nitrogen blowing device to obtain its overall stability. Compare the overall stability with the preset stability threshold. If the overall stability is less than the stability threshold, perform pinhole fine-tuning on the positive pressure nitrogen blowing device to obtain a new nitrogen blowing device. Use the new nitrogen blowing device as the positive pressure nitrogen blowing device and return to the step of performing airtightness testing on the positive pressure nitrogen blowing device until the overall stability is greater than or equal to the stability threshold. If the overall stability is greater than or equal to the stability threshold, the positive pressure nitrogen blowing device is used as a stable nitrogen blowing device to complete the stable assembly of the positive pressure nitrogen blowing component.

2. The stable assembly method for a positive pressure nitrogen blowing assembly as described in claim 1, characterized in that, The nitrogen blowing assembly in the component assembly environment includes: a nitrogen inlet pipe, a pressure regulating valve, a distribution manifold, and a nozzle holder. The pressure regulating valve includes: a regulating inlet end and a regulating outlet end. The distribution manifold includes: a main inlet end and multiple distribution ends. Each distribution end includes: a distribution threaded outlet. The nozzle holder includes: multiple fixing holes, and the number of fixing holes is equal to the number of distribution ends. The miniature ferrule connector includes: an upper interface, a lower interface, and a nut. The upper interface includes: an annular sealing groove, and the nut includes: a ferrule ring.

3. The stable assembly method for a positive pressure nitrogen blowing assembly as described in claim 2, characterized in that, The process of extracting performance characteristics from the O-ring to obtain its resistance to external forces and its compression curve includes: The hardness of the O-ring was obtained by testing the hardness of the soft ring using a pre-constructed hardness tester. Acquire a tensile testing machine and a compression testing machine, wherein the tensile testing machine includes: a force sensor, a displacement sensor, a fixing fixture and a tension rod, and the compression testing machine includes: a compression testing table and a test pressure plate; Based on the O-ring, the fixing fixture of the tensile testing machine and the tensile rod, confirm the fixing of the O-ring, and confirm the initial diameter and initial thickness of the fixing O-ring; The tensile testing machine's tension bar is used to stretch the fixed O-ring, and the tensile force and displacement of the tension bar are monitored in real time until the fixed O-ring breaks. The tensile force monitored by the tension bar when the fixed O-ring breaks is taken as the ultimate tensile force, and the tensile displacement monitored by the displacement bar when the fixed O-ring breaks is taken as the ultimate displacement. A stable O-ring was identified based on the pressure test bench and experimental pressure plate in the O-ring and pressure testing machine. The pressure is applied to the stable O-ring based on the preset pressure timing and the experimental pressure plate of the pressure testing machine. The parameters of the experimental pressure plate are read based on the preset monitoring interval until the stable O-ring cracks, resulting in multiple pressure displacement groups. The pressure displacement groups include: pressure plate pressure and pressure plate displacement. The ultimate pressure was determined based on multiple pressure displacement groups, where the ultimate pressure is the largest pressure plate pressure among the multiple pressure displacement groups; Multiple pressure displacement points were identified on a pre-constructed first coordinate system based on multiple pressure displacement groups. The horizontal axis of the first coordinate system represents the pressure of the pressure plate, and the vertical axis represents the displacement of the pressure plate. Curve fitting is performed on multiple pressure displacement points to obtain the stress compression curve; The resistance to external forces is calculated based on the soft ring's hardness, initial thickness, initial diameter, ultimate tensile force, ultimate displacement, and ultimate compressive force. The calculation formula is shown below: in, For resistance to external forces, The hardness of the soft ring, For the ultimate displacement, and These are the ultimate tensile force and the ultimate compressive force, respectively. and These are the initial diameter and initial thickness, respectively. It is the natural logarithm.

4. The stable assembly method for a positive pressure nitrogen blowing assembly as described in claim 3, characterized in that, The friction test of the miniature ferrule connector to obtain the wear resistance index of the lower end includes: A pre-built industrial camera was used to photograph the ferrule ring in the miniature ferrule connector to obtain an image of the ferrule surface; The surface finish of the SIM card sleeve is obtained by performing a difference analysis on the surface image of the SIM card sleeve and a pre-constructed standard SIM card sleeve image using a pre-built image difference model. Obtain a wear testing machine, wherein the wear testing machine includes: a friction column and a friction holder; Confirm the initial mass of the ferrule; Based on the aforementioned ferrule and the friction retainer and friction column in the wear testing machine, the fixed alignment ferrule was confirmed; The fixed alignment ferrule is rubbed based on the preset friction speed, preset friction time and friction column in the wear tester, and the fixed alignment ferrule is monitored during the friction process using a pre-constructed infrared thermometer and monitoring intervals to obtain the worn ferrule and multiple friction temperatures. The highest friction temperature was determined based on multiple friction temperatures, where the highest friction temperature is the largest among the multiple friction temperatures. Confirm the wear quality of the worn retaining ring; The lower end wear resistance index is calculated based on friction speed, friction time, ferrule surface finish, initial mass, wear mass, and maximum friction temperature. The calculation formula is shown below: in, The lower end wear resistance index, and These are the initial mass and the wear mass, respectively. For the smoothness of the card sleeve, and These are the friction speed and friction time, respectively. The highest friction temperature, It is the hyperbolic tangent function. It is a natural constant.

5. The stable assembly method for a positive pressure nitrogen blowing assembly as described in claim 4, characterized in that, The pressure test performed on the nitrogen blowing nozzle yields a set of nozzle pressure resistance parameters, including: Confirm the outer diameter and wall thickness of the nitrogen blowing needle; Obtain a material testing machine, wherein the material testing machine includes: a shearing platform and shearing blades; The nitrogen blowing nozzle is fixed on the shearing platform of the material testing machine to obtain a fixed nozzle; Based on the preset shearing force timing and shearing blade, the fixed nozzle is sheared, and the current shearing force of the shearing blade on the fixed nozzle is monitored in real time until the fixed nozzle breaks. The current shearing force monitored when the fixed nozzle breaks is taken as the ultimate shearing force. By summarizing the outer diameter of the blow needle, the needle wall thickness, and the ultimate shear force, a set of pressure resistance parameters for the blow needle is obtained.

6. The stable assembly method for a positive pressure nitrogen blowing assembly as described in claim 5, characterized in that, The calculation of the upper assembly torque based on the external force resistance and the force compression curve includes: Calculate the target compressive displacement based on the resistance to external forces; The target compression point is identified in the force-compression curve based on the target compression displacement, wherein the target compression point is located on the force-compression curve and the vertical coordinate of the target compression point in the first coordinate system is the target compression displacement; The target compression pressure is determined based on the target compression point, where the target compression pressure is the abscissa of the target compression point in the first coordinate system; Confirm the outer diameter of the upper thread and the upper friction coefficient of the miniature ferrule connector; The upper assembly torque is calculated based on the target compression pressure, the outer diameter of the upper thread, and the upper friction coefficient.

7. The stable assembly method for a positive pressure nitrogen blowing assembly as described in claim 6, characterized in that, The nitrogen blowing assembly, micro-ferrule connector, O-ring, and nitrogen blowing needle are stably assembled based on the upper assembly torque, lower assembly torque, and torque wrench to obtain a positive pressure nitrogen blowing device, including: Input the lower end assembly torque into the torque wrench to obtain the lower end wrench; Based on the preset installation depth, the nitrogen blowing needle is inserted into the lower interface of the micro ferrule connector, and the nut of the micro ferrule connector is tightened with the lower wrench to obtain a ferrule connector with a needle. Insert the O-ring into the annular sealing groove at the upper interface of the pin-type ferrule connector to obtain the ferrule connector. Perform the following operation on each of the multiple gas distributors in the distribution manifold: Input the upper assembly torque into the torque wrench to obtain the upper wrench; Use the upper wrench to screw the gas distribution thread outlet of the gas distribution end to the upper interface of the waiting ferrule connector to obtain the initial connection end; By summing the initial connection points, multiple initial connection points are obtained; Multiple initial connection ends are fixed to multiple fixing holes on the nozzle fixing seat to obtain multiple fixed connection ends, wherein each fixed connection end corresponds to a fixing hole. The connection and distribution manifold was identified based on multiple fixed connection ends and distribution manifolds; Connect the main air inlet of the distribution manifold to the regulating air outlet of the pressure regulating valve, and connect the nitrogen inlet pipe of the nitrogen blowing assembly to the regulating air inlet of the pressure regulating valve to obtain a positive pressure nitrogen blowing device.

8. The stable assembly method for a positive pressure nitrogen blowing assembly as described in claim 7, characterized in that, The gas tightness test of the positive pressure nitrogen blowing device was conducted to obtain the overall stability, including: Obtain leak detection fluid and a brush; Confirm the multiple upper and lower connection points of the positive pressure nitrogen blowing device, wherein each upper and lower connection point corresponds one-to-one with the fixed connection end; Perform the following operation at each of the multiple upper connection points in the positive pressure nitrogen blowing device: Use a brush to apply leak detection fluid to the upper connection point to cover the connection point; An industrial camera was used to photograph the cover joint to obtain an image of the covered liquid; Start the positive pressure nitrogen blowing device, and identify the operating connection point based on the positive pressure nitrogen blowing device and the cover connection point after startup; An industrial camera is used to photograph the connection points to obtain images of the liquid in operation; The difference in the liquid level was determined based on the image difference model, the covered liquid image, and the running liquid image. Summarize the differences in the loading solution to obtain multiple differences in the loading solution; Based on leak detection fluid, brush, positive pressure nitrogen blowing device, multiple lower end connections, industrial camera and image difference model, multiple lower fluid differences were identified. The overall stability is calculated based on multiple differences in the upper and lower fluids.

9. The stable assembly method for a positive pressure nitrogen blowing assembly as described in claim 8, characterized in that, The process of fine-tuning the positive pressure nitrogen blowing device through a pinhole to obtain a new nitrogen blowing device includes: For each of the multiple liquid loading differences, perform the following operation: Compare the upper liquid difference with the preset difference threshold. If the upper liquid difference is greater than the difference threshold, the upper connection point corresponding to the upper liquid difference is regarded as the abnormal upper connection point. The upper fine-tuning torque is calculated based on the upper liquid difference, the difference threshold and the upper assembly torque. Disassemble the abnormal upper connection to obtain the disassembled upper connection, confirm the position of the O-ring at the disassembled upper connection, and obtain the used O-ring at the O-ring position; Determine whether the used O-ring is in a broken state. If the used O-ring is in a broken state, subtract the upper fine-tuning torque from the upper assembly torque to obtain the optimized upper torque. If the O-ring is not broken, add the upper assembly torque to the upper fine-tuning torque to obtain the optimized upper torque; Based on the optimized upper torque and torque wrench, the optimized upper wrench is identified. The O-ring is placed in the O-ring position of the disassembled upper connection to obtain the updated disassembled upper part. The optimized upper wrench is used to screw the updated disassembled upper part to obtain a stable upper connection. If the difference in the upper liquid is less than or equal to the difference threshold, then the upper connection point corresponding to the difference in the upper liquid is taken as the stable upper connection point. By summing up the stable upper connection points, multiple stable upper connection points are obtained; For each of the multiple fluid difference rates, perform the following operation: Compare the lower liquid difference degree with the difference threshold. If the lower liquid difference degree is greater than the difference threshold, the lower connection point corresponding to the lower liquid difference degree is regarded as the abnormal lower connection point. The lower fine-tuning torque is obtained based on the lower liquid difference degree, the difference threshold and the lower assembly torque. Disassemble the abnormal lower connection to obtain the disassembled lower connection and the used spray needle; Determine if there are cracks in the used spray needle. If there are cracks in the used spray needle, subtract the lower end fine-tuning torque from the lower end assembly torque to obtain the optimized lower end torque. If there are no cracks after using the spray needle, add the lower end assembly torque and the lower end fine-tuning torque to obtain the optimized lower end torque; Based on optimizing the lower torque and obtaining the optimized lower wrench; Based on the installation depth, the nitrogen blowing needle is inserted into the lower interface of the disassembly lower connection, and the nut of the miniature ferrule connector at the disassembly lower connection is tightened using an optimized lower wrench to obtain a stable lower connection. By summarizing the stable lower-end connections, multiple stable lower-end connections are obtained; Based on multiple stable upper connection points, multiple stable lower connection points, and the positive pressure nitrogen blowing device, the replacement nitrogen blowing device was identified.

10. A stable assembly system for a positive pressure nitrogen blowing assembly, characterized in that, The system includes: The assembly environment confirmation module is used to receive component assembly instructions and confirm the component assembly environment based on the component assembly instructions. The component assembly environment includes: torque wrench, nitrogen blowing component set, micro ferrule connector, O-ring and nitrogen blowing needle. The component property analysis module is used to extract the performance characteristics of O-rings, obtain the external force resistance and stress compression curve, perform friction tests on micro ferrule joints to obtain the lower end wear resistance index, and perform pressure tests on nitrogen blowing needles to obtain the needle pressure resistance parameter set. The assembly parameter confirmation module is used to calculate the upper assembly torque based on the external force resistance and the force compression curve. It uses a pre-built assembly model to predict the assembly parameters of the lower wear index and the nozzle pressure resistance parameter set to obtain the lower assembly torque. Based on the upper assembly torque, the lower assembly torque and the torque wrench, the nitrogen blowing assembly, the micro ferrule, the O-ring and the nitrogen blowing nozzle are stably assembled to obtain the positive pressure nitrogen blowing device. The nitrogen blowing device calibration module is used to perform an airtightness test on the positive pressure nitrogen blowing device to obtain the overall stability. The overall stability is compared with a preset stability threshold. If the overall stability is less than the stability threshold, the positive pressure nitrogen blowing device is finely adjusted with pinholes to obtain a new nitrogen blowing device. The new nitrogen blowing device is used as the positive pressure nitrogen blowing device, and the process of performing an airtightness test on the positive pressure nitrogen blowing device is repeated until the overall stability is greater than or equal to the stability threshold. If the overall stability is greater than or equal to the stability threshold, the positive pressure nitrogen blowing device is used as the stable nitrogen blowing device, and the stable assembly of the positive pressure nitrogen blowing component is completed.

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