An Aerospace Fastener Product Inspection and Management System

Abstract

The invention discloses an aerospace fastener product inspection and management system, and relates to the technical field of fastener inspection. The invention detects the size and internal cracks of all fasteners, and then randomly samples and performs temperature, radiation and vibration tests on the sampled fasteners. After the test is completed, the qualified rate of the fasteners is analyzed according to the test data, and the trend of the qualified rate within a specified period is analyzed. Then, after the traceability condition is triggered, the production process is traced, and each abnormal link is analyzed to remind the staff to adjust the production process in time, increase the rigor of the fasteners in the production process, and ensure the quality and production effect of the fasteners. At the same time, the fasteners are inspected in multiple dimensions to improve the reliability of the inspection results, ensure the stability of the fasteners in the environmental conditions that may be experienced during the operation of the simulated spacecraft, and ensure the safety and reliability of the fasteners when in use.

Description

Technical Field

[0001] The present invention relates to the technical field of fastener management, and in particular to an aerospace fastener product detection and management system. Background Art

[0002] Fasteners in the aerospace field refer to various parts used to connect, fix and support aerospace devices and structures. Aerospace vehicles face harsh environments and stresses during operation, such as high radiation and high temperature. Therefore, fasteners must undergo rigorous testing to ensure that they can still operate safely and reliably under extreme conditions.

[0003] Prior art, such as the application with publication number CN107014816A, discloses a real-time quality inspection method and system for a fastener processing line, wherein the quality inspection method comprises the following steps: acquiring a reference image of a standard fastener; acquiring an image of the inspected fastener by a camera and comparing it with the reference image; determining whether it is a qualified product based on the comparison result and saving the comparison result in a database. The quality inspection method can replace the operators required after fastener processing, realize automatic loading, quality inspection, and automatic packaging line operations, improve inspection quality and speed, save production costs, and improve product quality and production efficiency.

[0004] The above scheme has at least the following deficiencies: 1. The aerospace field has very strict requirements for fasteners, and generally does not allow cracks inside fasteners. Cracks may cause damage to the strength and reliability of parts, but the above scheme only compares the images, but the images cannot reflect the internal cracks. Because the quality inspection of fasteners in the above scheme has certain limitations and singularity, it cannot guarantee the internal and external quality of fasteners, affecting the performance of subsequent fasteners in use.

[0005] 2. Aerospace devices fly in extreme temperature and high radiation environments for a long time, but the above scheme does not test the fasteners in extreme temperature and high radiation environments, and it is impossible to understand the stability and tolerance of the fasteners in extreme environments. At the same time, aerospace devices will produce severe vibrations during launch and flight, and the above scheme lacks vibration testing of fasteners, and cannot guarantee the stability of fasteners in environmental conditions that may be experienced during the operation of the simulated spacecraft, thereby failing to ensure the safety and reliability of the entire spacecraft system.

[0006] 3. The production process of fasteners affects the quality of fasteners. When the quality of fasteners is unqualified, the production process is traced back to find out the abnormal links and make adjustments. The production process of fasteners can be adjusted in time to ensure production quality. However, in the above scheme, the production process is not traced, and the abnormal links cannot be found in time, and the production process cannot be adjusted in time, thereby reducing the production effect and efficiency of fasteners and reducing the production quality qualification rate. Summary of the invention

[0007] In view of the above-mentioned technical deficiencies, the object of the present invention is to provide an aerospace fastener product inspection and management system.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides an aerospace fastener product inspection and management system, including: a quality inspection unit, a data analysis unit and a production feedback module;

[0009] The quality inspection unit includes a primary inspection module, a performance test module and a pass rate analysis module.

[0010] The primary inspection module is used to inspect the appearance and interior of each fastener after the production of the current batch of fasteners is completed, so as to obtain the primary qualified rate of the current batch of fasteners.

[0011] The performance testing module is used to perform performance testing on fasteners and obtain the performance qualification rate of the current batch of fasteners.

[0012] The qualified rate analysis module is used to obtain the qualified rate of the current batch of fasteners by using the primary qualified rate and the performance qualified rate of the current batch of fasteners, and to determine whether the production of the current batch of fasteners is qualified.

[0013] The data analysis unit includes a production quality trend analysis module and a production traceability module.

[0014] The production quality trend analysis module is used to obtain the qualified rate of fasteners of each production batch within a specified period and analyze the trend of fastener production quality within the specified period.

[0015] The production tracing module is used to filter out abnormal production process data and analyze each link of production abnormality when the production process tracing condition is triggered.

[0016] The production feedback module is used to generate a production inspection report for the current batch of fasteners based on the qualified rate of the current batch of fasteners, and to provide feedback on each link of production abnormalities.

[0017] The beneficial effects of the present invention are as follows: the present invention provides an aerospace fastener product inspection and management system, which inspects the size and internal cracks of all fasteners, and then randomly samples and performs temperature, radiation and vibration tests on the sampled fasteners. After the test is completed, the qualified rate of the fasteners is analyzed according to the test data, and the trend of the qualified rate within a specified period is analyzed. Then, after the traceability conditions are triggered, the production process is traced, and each abnormal link is analyzed to remind the staff to adjust the production process in time, increase the rigor of the fasteners in the production process, ensure the quality and production effect of the fasteners, and at the same time perform multi-dimensional inspections on the fasteners to improve the reliability of the inspection results, ensure the stability of the fasteners in the environmental conditions that may be experienced during the simulation of spacecraft operation, and ensure the safety and reliability of the fasteners when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the system structure connection of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1 As shown, an aerospace fastener product inspection and management system includes: a quality inspection unit, a data analysis unit and a production feedback module.

[0022] The quality inspection unit includes a primary inspection module, a performance test module and a pass rate analysis module.

[0023] The primary inspection module is used to inspect the appearance and interior of each fastener after the production of the current batch of fasteners is completed, so as to obtain the primary qualified rate of the current batch of fasteners.

[0024] In the above, fasteners include bolts, nuts and screws, etc.

[0025] In a specific embodiment, the primary qualified rate of the current batch of fasteners is obtained by the following specific process: using a camera to capture the surface image of each fastener, using machine vision technology to obtain the dimensional data of each fastener, and using ultrasonic technology to collect the number of internal cracks of each fastener, and then outputting the primary quality characteristic value of each fastener based on the primary recognition model, wherein the primary quality characteristic value includes values ​​of 1 and -1. When the primary quality characteristic value is 1, it indicates that the primary quality of the fastener is qualified, and when the primary quality characteristic value is -1, it indicates that the primary quality of the fastener is unqualified.

[0026] Among them, the expression of the primary recognition model is: , where represents the primary quality characteristic value of the i-th fastener, Respectively represent the size data and the number of internal cracks of the i-th fastener, Indicates the preset standard size data of fasteners. represents the preset allowable size data difference of the fastener, i represents the number of each fastener, and i is a positive integer greater than 1.

[0027] It should be noted that before production, the staff needs to input the dimensional data of the fasteners into the production control system. The production control system needs to produce according to the dimensional data of the fasteners. The standard dimensional data of the fasteners can be obtained from the production control system. The aerospace fastener product inspection and management system has built-in relevant standards and specifications of the aerospace industry. The relevant standards and specifications of the aerospace industry record the allowable dimensional data differences of fasteners; dimensional data include but are not limited to length and width.

[0028] The number of fasteners with a primary quality characteristic value of 1 is counted and recorded as the number of fasteners with primary quality qualification. The number of fasteners with primary quality qualification is divided by the total number of fasteners to obtain the primary qualification rate of the current batch of fasteners.

[0029] The performance testing module is used to perform performance testing on fasteners and obtain the performance qualification rate of the current batch of fasteners. In a specific embodiment, the performance testing on the fasteners is performed as follows: the performance testing includes temperature testing, radiation testing and vibration testing.

[0030] Several fasteners are randomly selected from the primary quality fasteners as selected fasteners. Before testing, the electrical data, mechanical data and chemical data of each selected fastener are collected and recorded as initial performance data. The selected fasteners that are not equal to the preset standard performance data threshold are eliminated to obtain the test fasteners, and the number of selected fasteners that are less than the standard performance data threshold is counted and recorded as the number of fasteners with unqualified performance.

[0031] It should be noted that electrical data includes but is not limited to resistance and insulation resistance, and resistance and insulation resistance can be measured using resistance and insulation test equipment.

[0032] Mechanical data includes but is not limited to torque and tension, which can be measured using torque wrenches and tensile testing machines. When the tensile testing machine applies tension to the fastener, if the fastener remains intact after the tension reaches the preset upper limit tension, the tension of the fastener is the upper limit tension. If the tension does not reach the preset upper limit tension, the fastener is damaged, and the tension of the fastener is the tension at the time of damage. The upper limit tension and preset standard performance data thresholds can be obtained from relevant standards and specifications of the aerospace industry.

[0033] Chemical data include the content of each material, which is detected by spectral analysis or X-ray diffraction analysis.

[0034] Each test fastener is divided into temperature test fasteners, radiation test fasteners and vibration test fasteners.

[0035] Obtain a preset operating environment temperature range for the spacecraft, set each test temperature in the preset operating environment temperature range according to a preset temperature interval, simulate each test temperature in a test chamber, place each temperature-tested fastener in the test chamber at each test temperature, and after waiting for a preset period of time, collect the second performance data, dimensional data, and number of internal cracks of each temperature-tested fastener.

[0036] It should be noted that the preset temperature interval is set by the staff and can be 5°C or 10°C, etc.

[0037] The radiation range of the preset operating environment of the spacecraft is obtained, and each test radiation amount is set according to the preset radiation amount difference. At the same time, the temperature in the test room is controlled to remain within the preset operating environment temperature range, and randomly changes within the preset operating environment temperature range. Electron beam irradiation of each test radiation amount is used in the test room to simulate the environment of each test radiation amount, and each radiation-tested fastener is placed in the simulated environment of each test radiation amount. After a preset period of time, the second performance data, dimensional data and the number of internal cracks of each radiation-tested fastener are collected.

[0038] It should be noted that the preset radiation difference is set by the staff and can be 2Sv or 4Sv, etc., where Sv stands for sievert, which is the unit of radiation.

[0039] The vibration frequency region of the preset operating environment of the spacecraft is obtained, each test vibration frequency is set according to the preset vibration frequency difference, the temperature of the test room is maintained within the preset operating environment temperature range, and randomly changes within the preset operating environment temperature range, and electron beam irradiation is used at the same time to control the radiation amount in the test room within the radiation amount range of the preset operating environment, and randomly changes within the radiation amount range of the preset operating environment, and then each vibration test fastener is placed in the vibration table of the test room, and the vibration table is controlled to vibrate according to each test vibration frequency. After the preset time, the second performance data, size data and the number of internal cracks of each vibration test fastener are collected.

[0040] It should be noted that the preset vibration frequency difference is set by the staff and can be 5 Hz or 10 Hz, etc.

[0041] It should be noted that before the test, the staff input the preset operating environment temperature range of the spacecraft, the radiation range of the preset operating environment of the spacecraft, and the vibration frequency range of the preset operating environment of the spacecraft into the aerospace fastener product inspection and management system, where the preset operating environment temperature range includes an extreme high temperature range and an extreme low temperature range.

[0042] It should also be noted that the method for collecting the dimensional data and the number of internal cracks of each temperature-measuring fastener, each radiation-measuring fastener and each vibration-measuring fastener is the same as the method for collecting the dimensional data and the number of internal cracks of each fastener; the method for collecting the second performance data of each temperature-measuring fastener, each radiation-measuring fastener and each vibration-measuring fastener is the same as the method for collecting the initial performance data of each selected fastener, and will not be described in detail here.

[0043] In another specific embodiment, the performance qualification rate of the current batch of fasteners is obtained by the following specific process: the size data and the number of internal cracks of each temperature-measured fastener, each radiation-measured fastener and each vibration-measured fastener are passed through a primary identification model to output a second primary quality characteristic value of each temperature-measured fastener, each radiation-measured fastener and each vibration-measured fastener.

[0044] It should be noted that the analysis method of the second primary quality characteristic value of each temperature-measured fastener, each radiation-measured fastener and each vibration-measured fastener is the same as the analysis method of the primary quality characteristic value of the i-th fastener, and will not be described in detail here.

[0045] The second performance data and initial performance data of each temperature-measuring fastener, each radiation-measuring fastener and each vibration-measuring fastener are passed through a performance identification model to output a second performance characteristic value of each temperature-measuring fastener, each radiation-measuring fastener and each vibration-measuring fastener, wherein the second performance characteristic value includes values ​​of 1 and -1. When the second performance characteristic value is 1, it indicates that the performance after the test is qualified. When the second performance characteristic value is -1, it indicates that the performance after the test is unqualified.

[0046] Among them, the expression of the performance identification model is: , where represents the second performance characteristic value, Respectively represent the second performance data and the initial performance data, It is a preset allowable performance data difference; the allowable performance data difference can be obtained from relevant standards and specifications of the aerospace industry.

[0047] The number of fasteners tested by temperature, the number of fasteners tested by radiation and the number of fasteners tested by vibration whose second primary quality characteristic value is 1 and whose second performance characteristic value is 1 are counted, and they are recorded as the number of fasteners tested by temperature, the number of fasteners tested by radiation and the number of fasteners tested by vibration, and marked as a1, a2 and a3 respectively; at the same time, the number of fasteners with unqualified performance is recorded as b1, and the total number of fasteners selected and the total number of fasteners tested are recorded as c1 and c2 respectively; the qualified rate is calculated by the formula expression , calculate the performance qualification rate of the current batch of fasteners .

[0048] The qualified rate analysis module is used to obtain the qualified rate of the current batch of fasteners by using the primary qualified rate and the performance qualified rate of the current batch of fasteners, and to determine whether the production of the current batch of fasteners is qualified.

[0049] In a specific embodiment, the method of obtaining the qualified rate of the current batch of fasteners and judging whether the production of the current batch of fasteners is qualified is as follows: multiplying the primary qualified rate of the current batch of fasteners by the performance qualified rate to obtain the qualified rate of the current batch of fasteners, and comparing the qualified rate of the current batch of fasteners with a preset qualified rate threshold. If the qualified rate of the current batch of fasteners is less than the preset qualified rate threshold, it indicates that the production of the current batch of fasteners is unqualified, otherwise it indicates that the production of the current batch of fasteners is qualified.

[0050] It should be noted that the preset pass rate threshold is set by the staff, and the preset pass rate threshold may be 95% or 96%, etc.

[0051] The data analysis unit includes a production quality trend analysis module and a production traceability module.

[0052] The production quality trend analysis module is used to obtain the qualified rate of fasteners of each production batch within a specified period and analyze the trend of fastener production quality within the specified period.

[0053] Among them, the qualified rate of fasteners of each production batch within a specified period is obtained from the production inspection records of the aerospace fastener product inspection management system.

[0054] In a specific embodiment, the analysis of the trend of fastener production quality within a specified period is carried out as follows: the qualified rate of fasteners of each production batch is fitted to a linear trend equation using the least squares method to obtain the slope of the linear trend equation. When the slope is greater than or equal to 0, it indicates that the trend of fastener production quality within the specified period is in a normal state; when the slope is less than 0, it indicates that the trend of fastener production quality within the specified period is in a declining state.

[0055] The production tracing module is used to filter out abnormal production process data and analyze each link of production abnormality when the production process tracing condition is triggered.

[0056] In a specific embodiment, when the production process traceability condition is triggered, abnormal production process data is screened out, and the specific process is as follows: if the current batch of fasteners is unqualified or the trend of fastener production quality within a specified period is in a downward state, the production process traceability condition is triggered.

[0057] Each fastener that fails primary quality, each fastener that fails performance, each fastener that fails temperature measurement, each fastener that fails radiation measurement, and each fastener that fails vibration measurement is recorded as a traceable fastener, and the unique identifier of each traceable fastener is identified. Based on the unique identifier and the production process data corresponding to each unique identifier in the production record, the production process data of each traceable fastener is obtained as abnormal production process data.

[0058] It should be noted that during production, all data generated by fasteners during the production process are monitored and recorded in real time as production process data, associated with the unique identification of the fasteners, and then stored in the cloud.

[0059] In another specific embodiment, the specific process of analyzing each link of production abnormality is as follows: obtaining the actual production data of each traceable fastener in each production link from the abnormal production process data, and obtaining the equipment control data, environmental data and production monitoring video from the actual production data, and then comparing them with the preset standard equipment control data, standard environmental data and standard production monitoring video. When the equipment control data, environmental data or production monitoring video of a traceable fastener in a certain production link is different from the standard equipment control data, standard environmental data or standard production monitoring video, the abnormality of the production link is increased by 1, the number of abnormalities of each production link is counted, and each production link with an abnormality number greater than the preset abnormality number threshold is taken as the link of production abnormality.

[0060] The production feedback module is used to generate a production inspection report for the current batch of fasteners based on the qualified rate of the current batch of fasteners, and to provide feedback on each link of production abnormalities.

[0061] In the above, the qualified rate of the current batch of fasteners is input into the preset template of the production inspection report to generate the production inspection report of the current batch of fasteners. When the current batch of fasteners is unqualified, the alarm will give an alarm prompt. The abnormal production link is displayed on the display, and the alarm will give an alarm prompt, completing the feedback of each link of the abnormal production.

[0062] The embodiment of the present invention detects the size and internal cracks of all fasteners, and then randomly samples and performs temperature, radiation and vibration tests on the sampled fasteners. After the test is completed, the qualified rate of the fasteners is analyzed according to the test data, and the trend of the qualified rate within a specified period is analyzed. Then, after the traceability condition is triggered, the production process is traced, and each abnormal link is analyzed to remind the staff to adjust the production process in time, increase the rigor of the fasteners in the production process, ensure the quality and production effect of the fasteners, and at the same time, perform multi-dimensional detection on the fasteners to improve the reliability of the detection results, ensure the stability of the fasteners in the environmental conditions that may be experienced during the simulation of spacecraft operation, and ensure the safety and reliability of the fasteners when in use.

[0063] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined in this specification, they shall all fall within the protection scope of the present invention.

Claims

1. An aerospace fastener product inspection and management system, characterized in that: include: Quality inspection unit, data analysis unit and production feedback module; The quality inspection unit includes a primary inspection module, a performance test module, and a pass rate analysis module; The primary inspection module is used to inspect the appearance and interior of each fastener after the production of the current batch of fasteners is completed, and obtain the primary qualified rate of the current batch of fasteners; The performance testing module is used to perform performance testing on fasteners and obtain the performance qualification rate of the current batch of fasteners; The qualified rate analysis module is used to obtain the qualified rate of the current batch of fasteners by using the primary qualified rate and performance qualified rate of the current batch of fasteners, and to determine whether the production of the current batch of fasteners is qualified; The data analysis unit includes a production quality trend analysis module and a production traceability module; The production quality trend analysis module is used to obtain the qualified rate of fasteners of each production batch within a specified period and analyze the trend of fastener production quality within the specified period; The production tracing module is used to filter out abnormal production process data and analyze various links of production abnormalities when the production process tracing conditions are triggered; The production feedback module is used to generate a production inspection report for the current batch of fasteners based on the qualified rate of the current batch of fasteners, and to provide feedback on each link of production abnormalities; The specific process of obtaining the primary qualified rate of the current batch of fasteners is as follows: Use a camera to capture the surface image of each fastener, use machine vision technology to obtain the size data of each fastener, and use ultrasonic technology to collect the number of internal cracks of each fastener. Then, based on the primary recognition model, output the primary quality characteristic value of each fastener, where the primary quality characteristic value includes values ​​of 1 and -1. When the primary quality characteristic value is 1, it indicates that the primary quality of the fastener is qualified, and when the primary quality characteristic value is -1, it indicates that the primary quality of the fastener is unqualified. The number of fasteners with a primary quality characteristic value of 1 is counted and recorded as the number of fasteners with primary quality qualification. The number of fasteners with primary quality qualification is divided by the total number of fasteners to obtain the primary qualification rate of the current batch of fasteners. The specific process of the fastener performance test is as follows: The performance tests include temperature test, radiation test and vibration test; A number of fasteners are randomly selected from each fastener of primary quality as each selected fastener. Before testing, the electrical data, mechanical data and chemical data of each selected fastener are collected and recorded as initial performance data. Each selected fastener that is not equal to the preset standard performance data threshold is eliminated to obtain each test fastener, and the number of selected fasteners that is less than the standard performance data threshold is counted and recorded as the number of fasteners with unqualified performance; Each test fastener is divided into each temperature test fastener, each radiation test fastener and each vibration test fastener; Obtaining a preset operating environment temperature range of the spacecraft, setting each test temperature in the preset operating environment temperature range according to a preset temperature interval, simulating each test temperature in a test chamber, placing each temperature-tested fastener in the test chamber of each test temperature, and after waiting for a preset time, collecting second performance data, dimensional data, and the number of internal cracks of each temperature-tested fastener; Obtain the radiation amount range of the preset operating environment of the spacecraft, set each test radiation amount according to the preset radiation amount difference, and at the same time control the temperature in the test room to remain within the preset operating environment temperature range, and randomly change within the preset operating environment temperature range, and use electron beam irradiation of each test radiation amount in the test room to simulate the environment of each test radiation amount, and put each radiation test fastener into the simulated environment of each test radiation amount respectively, and after a preset time, collect the second performance data, size data and the number of internal cracks of each radiation test fastener; Obtain the vibration frequency region of the preset operating environment of the spacecraft, set each test vibration frequency according to the preset vibration frequency difference, maintain the temperature of the test room within the preset operating environment temperature range, and randomly change within the preset operating environment temperature range, and use electron beam irradiation to control the radiation amount in the test room within the radiation amount range of the preset operating environment, and randomly change within the radiation amount range of the preset operating environment, and then put each vibration test fastener into the vibration table of the test room respectively, and control the vibration table to vibrate according to each test vibration frequency respectively, and after the preset time, collect the second performance data, size data and the number of internal cracks of each vibration test fastener; The specific process of obtaining the performance qualification rate of the current batch of fasteners is as follows: The size data and the number of internal cracks of each temperature-measured fastener, each radiation-measured fastener and each vibration-measured fastener are passed through a primary identification model to output a second primary quality characteristic value of each temperature-measured fastener, each radiation-measured fastener and each vibration-measured fastener; The second performance data and initial performance data of each temperature-measured fastener, each radiation-measured fastener, and each vibration-measured fastener are passed through a performance identification model, and a second performance characteristic value of each temperature-measured fastener, each radiation-measured fastener, and each vibration-measured fastener is output, wherein the second performance characteristic value includes values ​​of 1 and -1, and when the second performance characteristic value is 1, it indicates that the performance after the test is qualified, and when the second performance characteristic value is -1, it indicates that the performance after the test is unqualified; The number of fasteners tested by temperature, the number of fasteners tested by radiation, and the number of fasteners tested by vibration whose second primary quality characteristic value is 1 and whose second performance characteristic value is 1 are counted, and they are recorded as the number of fasteners tested by temperature, the number of fasteners tested by radiation, and the number of fasteners tested by vibration, respectively, and are marked as a1, a2, and a3; at the same time, the number of fasteners with unqualified performance is recorded as b1, and the total number of fasteners selected and the total number of fasteners tested are recorded as c1 and c2, respectively; The formula for calculating the pass rate is expressed in , calculate the performance qualification rate of the current batch of fasteners ; When the production process traceability condition is triggered, abnormal production process data is screened out. The specific process is as follows: If the current batch of fasteners is unqualified or the quality of fastener production is declining within a specified period, the production process traceability condition is triggered; Each fastener that fails primary quality, each fastener that fails performance, each fastener that fails temperature measurement, each fastener that fails radiation measurement, and each fastener that fails vibration measurement is recorded as a traceable fastener, and the unique identifier of each traceable fastener is identified. Based on the unique identifier and the production process data corresponding to each unique identifier in the production record, the production process data of each traceable fastener is obtained as abnormal production process data.

2. The aerospace fastener product inspection and management system according to claim 1, characterized in that: The method of obtaining the qualified rate of the current batch of fasteners and judging whether the production of the current batch of fasteners is qualified is specifically as follows: multiplying the primary qualified rate of the current batch of fasteners by the performance qualified rate to obtain the qualified rate of the current batch of fasteners, and comparing the qualified rate of the current batch of fasteners with a preset qualified rate threshold. If the qualified rate of the current batch of fasteners is less than the preset qualified rate threshold, it indicates that the production of the current batch of fasteners is unqualified, otherwise it indicates that the production of the current batch of fasteners is qualified.

3. The aerospace fastener product inspection and management system according to claim 1, characterized in that: The specific process of analyzing the trend of fastener production quality within a specified period is as follows: The qualified rate of fasteners in each production batch is fitted to a linear trend equation using the least square method to obtain the slope of the linear trend equation. When the slope is greater than or equal to 0, it indicates that the trend of fastener production quality within the specified period is in a normal state; When the slope is less than 0, it indicates that the trend of fastener production quality within the specified period is in a downward state.

4. The aerospace fastener product inspection and management system according to claim 1, characterized in that: The specific process of analyzing each link of production abnormality is as follows: The actual production data of each traceable fastener in each production link is obtained from the abnormal production process data, and the equipment control data, environmental data and production monitoring video are obtained from the actual production data, and then compared with the preset standard equipment control data, standard environmental data and standard production monitoring video. When the equipment control data, environmental data or production monitoring video of a traceable fastener in a certain production link is different from the standard equipment control data, standard environmental data or standard production monitoring video, the abnormality of the production link is increased by 1, the number of abnormalities of each production link is counted, and each production link with an abnormality number greater than the preset abnormality number threshold is regarded as the link of production abnormality.

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