Method and system for detecting uniformity of barrel plating of deep and blind hole fasteners

Abstract

The present invention provides a method and system for detecting uniformity of roll plating of deep hole blind hole fasteners, which relates to the technical field of coating detection. The method comprises: sampling in the current batch of fasteners to obtain a plurality of sample fasteners; setting a plurality of first sampling points at the preset positions of the sample fasteners, and determining the first preset weights of the respective first sampling points; obtaining the coating thickness at the respective first sampling points; determining the overall coating thickness uniformity detection score according to the coating thickness and the first preset weights; obtaining the initial weight of each sample fastener; obtaining test data; determining the overall corrosion resistance uniformity detection score according to the initial weight and the test data; determining the overall fastener roll plating uniformity detection score according to the overall coating thickness uniformity detection score and the overall corrosion resistance uniformity detection score; and generating a test report. According to the present invention, the accuracy and comprehensiveness of the fastener roll plating uniformity detection can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of coating detection, and in particular to a method and system for detecting uniformity of rolling plating of deep-hole and blind-hole fasteners. Background Art

[0002] In the related art, CN118858299A discloses an intelligent detection system and method for copper plating coating quality. First, the copper-plated samples produced in the same batch are collected by the collection unit to construct a first copper-plated sample set; secondly, the copper-plated samples in the first copper-plated sample set are subjected to appearance quality detection, coating thickness uniformity detection, coating adhesion detection and coating conductivity detection by the coating quality detection unit to obtain the coating quality detection results; finally, the quality detection pass rate is obtained by the output unit. Through this method, the scheme can not only detect appearance defects, but also detect intrinsic defects in the coating area of ​​the copper-plated sample without destroying the coating of the copper-plated sample, thereby improving the accuracy of coating quality detection.

[0003] CN111929296A discloses a quality control method for metal structure coating, including: appearance inspection: using magnifying optical equipment to perform appearance inspection on metal structure coating; thickness uniformity analysis test: using metallographic microscope method to perform thickness uniformity analysis on part coating; coating bonding test: rubbing the coating surface, and / or brushing the coating surface with a fine metal wheel on a brushing machine, and / or heating the coating to observe whether there is blistering, peeling or shedding on the coating surface; coating porosity test: dripping concentrated hydrochloric acid solution onto the coating surface to observe whether there are bubbles on the coating surface. By inspecting and monitoring the appearance, thickness uniformity, coating bonding and coating porosity of the metal structure coating, the smooth implementation of subsequent brazing and the use requirements of the brazed structural parts in a specific application environment can be guaranteed.

[0004] Based on the above related technologies, the accuracy of coating quality detection can be improved. However, the related technologies do not conduct a comprehensive detection of the uniformity of the coating, that is, it is impossible to conduct a comprehensive detection of the uniformity of the coating based on the coating thickness and the corrosion resistance of the coating.

[0005] The information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0006] The present invention provides a method and system for detecting uniformity of rolling plating of deep hole and blind hole fasteners, which can solve the technical problem that the related art cannot comprehensively detect the uniformity of the plating layer according to the thickness of the plating layer and the corrosion resistance of the plating layer.

[0007] According to a first aspect of the present invention, a method for detecting uniformity of barrel plating of deep hole and blind hole fasteners is provided, comprising:

[0008] Sampling the current batch of fasteners to obtain a plurality of sample fasteners;

[0009] Setting a plurality of first sampling points at preset positions of the sample fastener, and determining a first preset weight of each first sampling point;

[0010] Obtaining the coating thickness at each first sampling point;

[0011] Determining an overall coating thickness uniformity detection score according to the coating thickness and the first preset weight;

[0012] At the beginning of the corrosion test cycle, obtaining the initial weight of each sample fastener;

[0013] At multiple moments in the corrosion resistance test cycle, test data is acquired, wherein the test data includes: test weight, corrosion current density, test temperature, test humidity and test salt concentration;

[0014] Determining an overall corrosion resistance uniformity test score based on the initial weight and the test data;

[0015] Determine the overall fastener barrel plating uniformity test score according to the overall coating thickness uniformity test score and the overall corrosion resistance uniformity test score;

[0016] A test report is generated based on the overall fastener roll plating uniformity test score.

[0017] According to a second aspect of the present invention, there is provided a deep hole blind hole fastener barrel plating uniformity detection system, comprising:

[0018] A sampling module, used for sampling the fasteners in the current batch to obtain a plurality of sample fasteners;

[0019] A sampling point module, used to set a plurality of first sampling points at preset positions of the sample fastener, and determine a first preset weight value of each first sampling point;

[0020] A coating thickness module, used to obtain the coating thickness at each first sampling point;

[0021] A thickness uniformity module, used to determine an overall coating thickness uniformity detection score according to the coating thickness and the first preset weight;

[0022] An initial data module, used to obtain the initial weight of each sample fastener at the beginning of the corrosion resistance test cycle;

[0023] A corrosion test module, used to obtain test data at multiple moments in the corrosion resistance test cycle, wherein the test data includes: test weight, corrosion current density, test temperature, test humidity and test salt concentration;

[0024] A corrosion resistance uniformity module, for determining an overall corrosion resistance uniformity detection score based on the initial weight and the test data;

[0025] An overall detection scoring module, used to determine an overall fastener barrel plating uniformity detection score according to the overall coating thickness uniformity detection score and the overall corrosion resistance uniformity detection score;

[0026] The test report module is used to generate a test report based on the overall fastener roll plating uniformity test score.

[0027] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0028] According to the present invention, the coating thickness distribution and corrosion resistance distribution of the fastener can be accurately analyzed to obtain the overall coating thickness uniformity detection score and the overall corrosion resistance uniformity detection score. Further, the coating thickness distribution uniformity and corrosion resistance distribution uniformity of the fastener are comprehensively detected, which can improve the comprehensiveness and accuracy of the fastener coating uniformity detection. When determining the coating thickness uniformity detection score, the coating thickness uniformity detection score of the kth sample fastener can be determined according to the coating thickness at each first sampling point of the kth sample fastener and the first preset weight. In the calculation process, the coating quality of the sample fastener can be evaluated according to the detection importance of the sampling point location and the uneven distribution of the coating at the sampling point. Further, the coating thickness uniformity of the sample fastener is evaluated according to the overall coating thickness distribution of all sampling points and the coating quality of the sample fastener, which improves the accuracy of the coating thickness uniformity detection score. When determining the local corrosion resistance detection score, the local corrosion resistance detection score of the i-th first test area of ​​the k-th sample fastener can be determined based on the test data and initial weight of the i-th first test area of ​​the k-th sample fastener. During the calculation process, the degree of corrosion in the test area of ​​the fastener can be reflected by the change in the mass of the fastener, and the corrosion intensity of the corrosion resistance test can be evaluated through the test temperature, test humidity, corrosion current density, test salt concentration and test time. Furthermore, the local corrosion resistance detection score is determined based on the degree of corrosion in the test area of ​​the fastener and the corrosion intensity of the corrosion resistance test, thereby improving the accuracy of the local corrosion resistance detection score. When determining the overall corrosion resistance uniformity test score, the overall corrosion resistance uniformity test score of the current batch of fasteners can be determined based on the first standard deviation and the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener. During the calculation process, the corrosion resistance uniformity status of the sample fasteners can be evaluated based on the stability of the local corrosion resistance test scores of each first test area of ​​the sample fasteners, and based on the corrosion resistance uniformity status of the sample fasteners, it can be determined whether the overall corrosion resistance uniformity test of the sample fasteners is qualified. Furthermore, based on the overall corrosion resistance uniformity test results of all sample fasteners, the overall corrosion resistance uniformity test score of the current batch of fasteners is determined, thereby improving the comprehensiveness and accuracy of the overall corrosion resistance uniformity test score.

[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and do not limit the present invention. Other features and aspects of the present invention will become more apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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 in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other embodiments can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic diagram of a process flow of a method for detecting uniformity of barrel plating of deep hole and blind hole fasteners according to an embodiment of the present invention is exemplarily shown;

[0032] Figure 2 A schematic diagram of a deep hole and blind hole fastener barrel plating uniformity detection system according to an embodiment of the present invention is exemplarily shown. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0034] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0035] Figure 1 A schematic flow chart of a method for detecting uniformity of rolling plating of deep hole and blind hole fasteners according to an embodiment of the present invention is exemplarily shown, and the method comprises:

[0036] Step S101, sampling the fasteners in the current batch to obtain a plurality of sample fasteners;

[0037] Step S102, setting a plurality of first sampling points at preset positions of the sample fastener, and determining a first preset weight of each first sampling point;

[0038] Step S103, obtaining the coating thickness at each first sampling point;

[0039] Step S104, determining an overall coating thickness uniformity detection score according to the coating thickness and the first preset weight;

[0040] Step S105, obtaining the initial weight of each sample fastener at the beginning of the corrosion resistance test cycle;

[0041] Step S106, acquiring test data at multiple moments in the corrosion resistance test cycle, wherein the test data includes: test weight, corrosion current density, test temperature, test humidity and test salt concentration;

[0042] Step S107, determining an overall corrosion resistance uniformity detection score according to the initial weight and the test data;

[0043] Step S108, determining an overall fastener barrel plating uniformity detection score according to the overall coating thickness uniformity detection score and the overall corrosion resistance uniformity detection score;

[0044] Step S109, generating a test report according to the overall fastener roll plating uniformity test score.

[0045] According to the deep hole and blind hole fastener roll plating uniformity detection method of the embodiment of the present invention, the coating thickness distribution and corrosion resistance distribution of the fastener can be accurately analyzed to obtain the overall coating thickness uniformity detection score and the overall corrosion resistance uniformity detection score. Furthermore, the fastener roll plating uniformity is comprehensively detected by the two aspects of coating thickness distribution uniformity and corrosion resistance distribution uniformity, which can improve the comprehensiveness and accuracy of the fastener roll plating uniformity detection.

[0046] According to an embodiment of the present invention, in step S101, sampling is performed in the current batch of fasteners to obtain a plurality of sample fasteners.

[0047] For example, a random sample is performed among the current batch of fasteners to identify a plurality of sample fasteners.

[0048] According to an embodiment of the present invention, in step S102, a plurality of first sampling points are set at preset positions of the sample fastener, and a first preset weight of each first sampling point is determined.

[0049] Among them, multiple first sampling points are set at preset positions of the sample fasteners. The first sampling points should be evenly distributed at various important parts of the fasteners, including key areas such as corners and threaded parts. The number of first sampling points should be sufficient to ensure the statistical significance of the test results, and the first preset weights are allocated according to the test importance of the parts where the first sampling points are located. For example, the coating thickness at the corners and threaded positions of the fasteners is often difficult to deposit uniformly, and the first preset weights of the first sampling points at these positions are relatively large.

[0050] According to an embodiment of the present invention, in step S103, the coating thickness at each first sampling point is obtained.

[0051] For example, a magnetic thickness gauge is used to measure the coating thickness at each first sampling point of the sample fastener.

[0052] According to an embodiment of the present invention, in step S104, the overall coating thickness uniformity detection score is determined according to the coating thickness and the first preset weight.

[0053] According to one embodiment of the present invention, step S104 includes:

[0054] Determine a coating thickness uniformity detection score of the kth sample fastener according to the coating thickness at each first sampling point of the kth sample fastener and the first preset weight;

[0055] Obtaining the number of sample fasteners;

[0056] The overall coating thickness uniformity detection score of the current batch of fasteners is determined according to the coating thickness uniformity detection score of the kth sample fastener and the number of the sample fasteners.

[0057] For example, based on the coating thickness at each first sampling point of the kth sample fastener and the first preset weight corresponding to the first sampling point, the coating thickness uniformity of the kth fastener is evaluated to determine the coating thickness uniformity detection score; based on the coating thickness uniformity detection scores of each sample fastener, the overall coating thickness uniformity of the current batch of fasteners is evaluated to determine the overall coating thickness uniformity detection score.

[0058] According to one embodiment of the present invention, according to the coating thickness at each first sampling point of the kth sample fastener and the first preset weight, determining the coating thickness uniformity detection score of the kth sample fastener includes: determining the coating thickness uniformity detection score of the kth sample fastener according to formula (1): ,

[0059] (1),

[0060] in, and is the preset weight, is the first preset weight corresponding to the i-th first sampling point, max is the maximum value function, min is the minimum value function, is the coating thickness at the i-th first sampling point of the k-th sample fastener, n is the number of first sampling points in the sample fastener, i≤n, and i and n are both positive integers.

[0061] According to one embodiment of the present invention, is the difference between the maximum and minimum values ​​of the coating thickness at the n first sampling points of the kth sample fastener, indicating the fluctuation range of the median of the number set composed of n coating thicknesses, is the average value of the coating thickness at the n first sampling points of the kth sample fastener, indicating the center position of the number set composed of n coating thicknesses, It is the ratio of the difference between the maximum and minimum values ​​of the coating thickness at the n first sampling points of the kth sample fastener to the average value of the coating thickness at the n first sampling points of the kth sample fastener. The larger the ratio, the more uneven the overall coating thickness distribution of the kth sample fastener. is the relative difference between the coating thickness at the i-th first sampling point of the k-th sample fastener and the average coating thickness at the n first sampling points of the k-th sample fastener. The larger the ratio, the greater the uneven distribution of the coating thickness at the i-th first sampling point. is the first preset weight corresponding to the i-th first sampling point, indicating the detection importance of the i-th first sampling point. is the product of the uneven distribution of the coating at the i-th first sampling point and the detection importance of the i-th first sampling point, indicating the degree of influence of the fastener coating quality caused by the uneven distribution of the coating at the i-th first sampling point. Represents the overall coating quality status of the kth sample fastener.

[0062] According to one embodiment of the present invention, It means that the coating thickness uniformity detection score of the kth sample fastener is determined according to the overall coating thickness distribution and the overall coating quality of the kth sample fastener. The larger the score, the worse the coating thickness uniformity of the kth sample fastener.

[0063] In this way, the coating thickness uniformity detection score of the kth sample fastener can be determined according to the coating thickness at each first sampling point of the kth sample fastener and the first preset weight. During the calculation process, the coating quality status of the sample fastener can be evaluated according to the detection importance of the sampling point location and the uneven distribution of the coating at the sampling point. Furthermore, the coating thickness uniformity of the sample fastener is evaluated according to the overall coating thickness distribution status of all sampling points and the coating quality status of the sample fastener, thereby improving the accuracy of the coating thickness uniformity detection score.

[0064] According to one embodiment of the present invention, determining the overall coating thickness uniformity detection score of the current batch of fasteners according to the coating thickness uniformity detection score of the kth sample fastener and the number of the sample fasteners includes:

[0065] Determining a coating uniformity test result of the kth sample fastener according to the coating thickness uniformity test score of the kth sample fastener and a preset coating thickness uniformity test score threshold;

[0066] An overall coating thickness uniformity test score for the current batch of fasteners is determined based on the coating uniformity test result of the kth sample fastener and the number of the sample fasteners.

[0067] For example, if the coating thickness uniformity test score of the kth sample fastener is greater than the preset coating thickness uniformity test score threshold, the coating uniformity test result of the kth sample fastener is 0; if the coating thickness uniformity test score of the kth sample fastener is less than or equal to the preset coating thickness uniformity test score threshold, the coating uniformity test result of the kth sample fastener is 1; according to the number of sample fasteners, the coating uniformity test results of each sample fastener are averaged to determine the overall coating thickness uniformity test score; the larger the overall coating thickness uniformity test score, the more uniform the overall coating thickness distribution of the fasteners in the current batch is.

[0068] According to one embodiment of the present invention, in step S105, at the beginning of the corrosion resistance test cycle, the initial weight of each sample fastener is obtained.

[0069] For example, one of the main functions of barrel plating is to provide corrosion protection. By testing the corrosion resistance of different parts of the fastener, the uniformity of barrel plating can be evaluated. At the beginning of the corrosion test cycle, the initial weight of each sample fastener is obtained through a weighing device.

[0070] According to one embodiment of the present invention, in step S106, test data is acquired at multiple moments in the corrosion resistance test cycle, wherein the test data includes: test weight, corrosion current density, test temperature, test humidity and test salt concentration.

[0071] For example, in a corrosion resistance test cycle, a salt spray test is used to perform corrosion resistance tests on different test areas of the fastener. For example, when performing a corrosion resistance test on the first test area of ​​the fastener, the fastener is fixed on a bracket in the testing machine and its position is adjusted. The spray direction and spray pressure of the testing machine are controlled so that only the first test area to be tested is sprayed. The test temperature and test humidity in the test cycle are detected by a temperature sensor and a humidity sensor. The corrosion current density in the test cycle is detected by setting up an electrochemical workstation. The test salt concentration in the test cycle is detected by a conductivity meter. At the end of the test cycle, after the sample fastener is cleaned and the surface chemical reaction substances are removed, the weight of the sample fastener is measured to determine the test weight.

[0072] According to one embodiment of the present invention, in step S107, the overall corrosion resistance uniformity detection score is determined based on the initial weight and the test data.

[0073] According to one embodiment of the present invention, step S107 includes:

[0074] Acquire test data of an i-th first test area of ​​a k-th sample fastener, wherein the first test area is divided according to the first sampling point;

[0075] Determining a local corrosion resistance detection score of the i-th first test area of ​​the k-th sample fastener according to the test data of the i-th first test area of ​​the k-th sample fastener and the initial weight;

[0076] The overall corrosion resistance uniformity test score of the current batch of fasteners is determined according to the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener.

[0077] For example, in a corrosion resistance test cycle, the sample fasteners are divided into regions according to the first sampling points set on the sample fasteners to determine a plurality of first test regions, each first sampling point corresponds to a first test region, and corrosion resistance tests are performed on different first test regions of the sample fasteners respectively. Based on the test data of the i-th first test region of the k-th sample fastener and the initial weight of the k-th sample fastener, the corrosion resistance performance of the i-th first test region of the k-th sample fastener is evaluated to determine the local corrosion resistance detection score of the i-th first test region of the k-th sample fastener; based on the local corrosion resistance detection scores of the first test regions of the k-th sample fastener, the overall corrosion resistance performance of the current batch of fasteners is evaluated to determine the overall corrosion resistance uniformity detection score of the current batch of fasteners.

[0078] According to one embodiment of the present invention, determining the local corrosion resistance detection score of the i-th first test area of ​​the k-th sample fastener according to the test data of the i-th first test area of ​​the k-th sample fastener and the initial weight includes: determining the local corrosion resistance detection score of the i-th first test area of ​​the k-th sample fastener according to formula (2): ,

[0079] (2),

[0080] in, , , and is the preset weight, is the initial weight of the kth sample fastener, is the test weight of the kth sample fastener at the end of the corrosion test cycle, is the test temperature at the jth moment of the corrosion resistance test cycle, is the test humidity at the jth moment of the corrosion resistance test cycle, is the corrosion current density at the jth moment of the corrosion resistance test cycle, is the test salt concentration at the jth moment of the corrosion test cycle, m is the number of moments in the corrosion test cycle, j≤m, and both j and m are positive integers.

[0081] According to one embodiment of the present invention, Indicates the corrosion intensity of the corrosion resistance test cycle, The change of is a combination of exponential function and linear function, where The exponential function indicates that as the average test temperature, average test humidity, average corrosion current density and average test salt concentration in the corrosion test cycle increase, the influence of the corrosion intensity of the corrosion test cycle increases at an accelerated rate and at a non-uniform rate. The product of the exponential function and m indicates that as the duration of the corrosion test cycle increases, the corrosion intensity of the corrosion test cycle increases at a uniform rate. is the difference between the initial weight of the kth sample fastener and the test weight of the kth sample fastener at the end of the corrosion test cycle, indicating the degree of corrosion of the i-th first test area of ​​the kth sample fastener during the corrosion test cycle. It is the ratio of the corrosion intensity of the corrosion test cycle to the degree of corrosion of the i-th first test area of ​​the k-th sample fastener in the corrosion test cycle, indicating the corrosion resistance performance of the i-th first test area of ​​the k-th sample fastener. The larger the ratio is, the stronger the corrosion resistance performance of the i-th first test area of ​​the k-th sample fastener is.

[0082] In this way, the local corrosion resistance detection score of the i-th first test area of ​​the k-th sample fastener can be determined based on the test data and initial weight of the i-th first test area of ​​the k-th sample fastener. During the calculation process, the degree of corrosion in the test area of ​​the fastener can be reflected by the change in the mass of the fastener, and the corrosion intensity of the corrosion resistance test can be evaluated by the test temperature, test humidity, corrosion current density, test salt concentration and test time. Furthermore, the local corrosion resistance detection score is determined by the degree of corrosion in the test area of ​​the fastener and the corrosion intensity of the corrosion resistance test, thereby improving the accuracy of the local corrosion resistance detection score.

[0083] According to one embodiment of the present invention, determining the overall corrosion resistance uniformity test score of the current batch of fasteners according to the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener includes:

[0084] Determining an average local corrosion resistance test score of the m first test areas of the kth sample fastener;

[0085] Determining a first standard deviation based on the average local corrosion resistance test score;

[0086] An overall corrosion resistance uniformity test score of the current batch of fasteners is determined according to the first standard deviation and the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener.

[0087] For example, the local corrosion resistance test scores of the m first test areas of the kth sample fastener are averaged to determine the average local corrosion resistance test score of the m first test areas of the kth sample fastener; the first standard deviation is calculated based on the average local corrosion resistance test score and the local corrosion resistance test scores of the m first test areas; the overall corrosion resistance uniformity of the previous batch of fasteners is evaluated based on the local corrosion resistance test score and the local corrosion resistance test score of the i-th first test area of ​​the kth sample fastener to determine the overall corrosion resistance uniformity test score.

[0088] According to one embodiment of the present invention, determining the overall corrosion resistance uniformity test score of the current batch of fasteners according to the first standard deviation and the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener includes: determining the overall corrosion resistance uniformity test score of the current batch of fasteners according to formula (3): ,

[0089] ,

[0090] Among them, if is a conditional function, is the preset threshold, is the preset multiple, The local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener is, is the first standard deviation, n is the number of the first test areas, i≤n, K is the number of sample fasteners, k≤K, and i, n, k and K are all positive integers.

[0091] According to one embodiment of the present invention, in formula (3), the inner condition function The value of includes the following two cases, when it satisfies When the condition is met, it means that the local corrosion resistance test score of the first test area of ​​the kth sample fastener is within the interval with the average local corrosion resistance test score as the center and the standard deviation of twice the preset multiple as the interval length. The value of the inner condition function is 1. When it is not met When the condition is met, the value of the inner condition function is 0. If the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener meets the above conditions, it means that the deviation between the local corrosion resistance test score of the first test area and the mean is small, and the local corrosion resistance of the i-th first test area is relatively uniform in each test area. The sum is calculated based on the number of first test areas, which indicates the number of first test areas in the kth sample fastener where the local corrosion resistance is relatively uniform. The larger the value, the more uniform the corrosion resistance distribution of each part of the kth sample fastener.

[0092] According to one embodiment of the present invention, the conditional function The value of includes the following two cases, when it satisfies When the condition is met, it means that the number of the first test area with relatively uniform local corrosion resistance distribution in the kth sample fastener is small, and the value of the condition function is 0. When the condition is met, it means that the number of the first test areas with relatively uniform local corrosion resistance distribution in the k-th sample fastener is large, the overall corrosion resistance uniformity test of the k-th sample fastener is qualified, and the value of the condition function is 1. The average value is calculated based on the number of sample fasteners, which is the ratio of the number of sample fasteners that pass the overall corrosion resistance uniformity test to the total number of sample fasteners. The larger the ratio, the stronger the overall corrosion uniformity of the fasteners in the current batch.

[0093] In this way, the overall corrosion resistance uniformity test score of the current batch of fasteners can be determined based on the first standard deviation and the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener. During the calculation process, the corrosion resistance uniformity status of the sample fastener can be evaluated based on the stability of the local corrosion resistance test scores of each first test area of ​​the sample fastener, and based on the corrosion resistance uniformity status of the sample fastener, it can be determined whether the overall corrosion resistance uniformity test of the sample fastener is qualified. Furthermore, based on the overall corrosion resistance uniformity test results of all sample fasteners, the overall corrosion resistance uniformity test score of the current batch of fasteners is determined, thereby improving the comprehensiveness and accuracy of the overall corrosion resistance uniformity test score.

[0094] According to one embodiment of the present invention, in step S108, the overall fastener barrel plating uniformity detection score is determined according to the overall coating thickness uniformity detection score and the overall corrosion resistance uniformity detection score.

[0095] For example, the overall fastener roll plating uniformity test score is determined by taking a weighted sum of the overall coating thickness uniformity test score and the overall corrosion resistance uniformity test score.

[0096] According to one embodiment of the present invention, in step S109, a test report is generated based on the overall fastener barrel plating uniformity test score.

[0097] For example, if the overall fastener barrel plating uniformity detection score is less than a set overall fastener barrel plating uniformity detection score threshold, it means that the barrel plating uniformity detection of the current batch of fasteners fails.

[0098] According to the method for detecting uniformity of rolling plating of deep blind hole fasteners of the embodiment of the present invention, the coating thickness distribution and corrosion resistance distribution of the fasteners can be accurately analyzed to obtain the overall coating thickness uniformity detection score and the overall corrosion resistance uniformity detection score. Furthermore, the uniformity of fastener rolling plating can be comprehensively detected by the two aspects of coating thickness distribution uniformity and corrosion resistance distribution uniformity, which can improve the comprehensiveness and accuracy of fastener rolling plating uniformity detection. When determining the coating thickness uniformity detection score, the coating thickness uniformity detection score of the kth sample fastener can be determined according to the coating thickness at each first sampling point of the kth sample fastener and the first preset weight. In the calculation process, the coating quality of the sample fastener can be evaluated according to the detection importance of the sampling point location and the uneven distribution of the coating at the sampling point. Further, the coating thickness uniformity of the sample fastener is evaluated according to the overall coating thickness distribution of all sampling points and the coating quality of the sample fastener, which improves the accuracy of the coating thickness uniformity detection score. When determining the local corrosion resistance detection score, the local corrosion resistance detection score of the i-th first test area of ​​the k-th sample fastener can be determined based on the test data and initial weight of the i-th first test area of ​​the k-th sample fastener. During the calculation process, the degree of corrosion in the test area of ​​the fastener can be reflected by the change in the mass of the fastener, and the corrosion intensity of the corrosion resistance test can be evaluated through the test temperature, test humidity, corrosion current density, test salt concentration and test time. Furthermore, the local corrosion resistance detection score is determined based on the degree of corrosion in the test area of ​​the fastener and the corrosion intensity of the corrosion resistance test, thereby improving the accuracy of the local corrosion resistance detection score. When determining the overall corrosion resistance uniformity test score, the overall corrosion resistance uniformity test score of the current batch of fasteners can be determined based on the first standard deviation and the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener. During the calculation process, the corrosion resistance uniformity status of the sample fasteners can be evaluated based on the stability of the local corrosion resistance test scores of each first test area of ​​the sample fasteners, and based on the corrosion resistance uniformity status of the sample fasteners, it can be determined whether the overall corrosion resistance uniformity test of the sample fasteners is qualified. Furthermore, based on the overall corrosion resistance uniformity test results of all sample fasteners, the overall corrosion resistance uniformity test score of the current batch of fasteners is determined, thereby improving the comprehensiveness and accuracy of the overall corrosion resistance uniformity test score.

[0099] Figure 2 A schematic diagram of a deep hole and blind hole fastener barrel plating uniformity detection system according to an embodiment of the present invention is exemplarily shown, the system comprising:

[0100] A sampling module, used for sampling the fasteners in the current batch to obtain a plurality of sample fasteners;

[0101] A sampling point module, used to set a plurality of first sampling points at preset positions of the sample fastener, and determine a first preset weight value of each first sampling point;

[0102] A coating thickness module, used to obtain the coating thickness at each first sampling point;

[0103] A thickness uniformity module, used to determine an overall coating thickness uniformity detection score according to the coating thickness and the first preset weight;

[0104] An initial data module, used to obtain the initial weight of each sample fastener at the beginning of the corrosion resistance test cycle;

[0105] A corrosion test module, used to obtain test data at multiple moments in the corrosion resistance test cycle, wherein the test data includes: test weight, corrosion current density, test temperature, test humidity and test salt concentration;

[0106] A corrosion resistance uniformity module, for determining an overall corrosion resistance uniformity detection score based on the initial weight and the test data;

[0107] An overall detection scoring module, used to determine an overall fastener barrel plating uniformity detection score according to the overall coating thickness uniformity detection score and the overall corrosion resistance uniformity detection score;

[0108] The test report module is used to generate a test report based on the overall fastener roll plating uniformity test score.

[0109] The present invention may be a method, an apparatus, a system and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for executing various aspects of the present invention.

[0110] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A method for detecting uniformity of barrel plating of deep hole blind hole fasteners, characterized in that: include: Sampling the current batch of fasteners to obtain a plurality of sample fasteners; Setting a plurality of first sampling points at preset positions of the sample fastener, and determining a first preset weight of each first sampling point; Obtaining the coating thickness at each first sampling point; Determining an overall coating thickness uniformity detection score according to the coating thickness and the first preset weight; At the beginning of the corrosion test cycle, obtaining the initial weight of each sample fastener; At multiple moments in the corrosion resistance test cycle, acquiring test data, wherein the test data includes: test weight, corrosion current density, test temperature, test humidity and test salt concentration; Determining an overall corrosion resistance uniformity test score based on the initial weight and the test data; Determine the overall fastener barrel plating uniformity test score according to the overall coating thickness uniformity test score and the overall corrosion resistance uniformity test score; Generating a test report according to the overall fastener barrel plating uniformity test score; Determining an overall coating thickness uniformity detection score according to the coating thickness and the first preset weight, including: Determine a coating thickness uniformity detection score of the kth sample fastener according to the coating thickness at each first sampling point of the kth sample fastener and the first preset weight; Obtaining the number of sample fasteners; Determine the overall coating thickness uniformity test score of the current batch of fasteners according to the coating thickness uniformity test score of the kth sample fastener and the number of the sample fasteners; Based on the initial weight and the test data, an overall corrosion resistance uniformity test score is determined, including: Acquire test data of an i-th first test area of ​​a k-th sample fastener, wherein the first test area is divided according to the first sampling point; In the corrosion resistance test cycle, the sample fastener is divided into regions according to the first sampling points set on the sample fastener to determine a plurality of first test regions, each first sampling point corresponding to a first test region; Determining a local corrosion resistance detection score of the i-th first test area of ​​the k-th sample fastener according to the test data of the i-th first test area of ​​the k-th sample fastener and the initial weight; The overall corrosion resistance uniformity test score of the current batch of fasteners is determined according to the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener.

2. The method for detecting uniformity of barrel plating of deep hole blind hole fasteners according to claim 1, characterized in that: Determining a coating thickness uniformity detection score of the kth sample fastener according to the coating thickness at each first sampling point of the kth sample fastener and the first preset weight, including: According to the formula ， Determine the coating thickness uniformity test score for the kth sample fastener ,in, and is the preset weight, is the first preset weight corresponding to the i-th first sampling point, max is the maximum value function, min is the minimum value function, is the coating thickness at the i-th first sampling point of the k-th sample fastener, n is the number of first sampling points in the sample fastener, i≤n, and i and n are both positive integers.

3. The method for detecting uniformity of barrel plating of deep hole blind hole fasteners according to claim 2, characterized in that: Determining the overall coating thickness uniformity test score of the current batch of fasteners according to the coating thickness uniformity test score of the kth sample fastener and the number of the sample fasteners, including: Determining a coating uniformity test result of the kth sample fastener according to the coating thickness uniformity test score of the kth sample fastener and a preset coating thickness uniformity test score threshold; An overall coating thickness uniformity test score for the current batch of fasteners is determined based on the coating uniformity test result of the kth sample fastener and the number of the sample fasteners.

4. The method for detecting uniformity of barrel plating of deep hole and blind hole fasteners according to claim 1, characterized in that: Determining a local corrosion resistance detection score of the i-th first test area of ​​the k-th sample fastener according to the test data of the i-th first test area of ​​the k-th sample fastener and the initial weight, comprising: According to the formula ， Determine the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener ,in, , , and is the preset weight, is the initial weight of the kth sample fastener, is the test weight of the kth sample fastener at the end of the corrosion test cycle, is the test temperature at the jth moment of the corrosion resistance test cycle, is the test humidity at the jth moment of the corrosion resistance test cycle, is the corrosion current density at the jth moment of the corrosion resistance test cycle, is the test salt concentration at the jth moment of the corrosion test cycle, m is the number of moments in the corrosion test cycle, j≤m, and both j and m are positive integers.

5. The method for detecting uniformity of barrel plating of deep hole and blind hole fasteners according to claim 1, characterized in that: Determining the overall corrosion resistance uniformity test score of the current batch of fasteners according to the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener, including: Determining an average local corrosion resistance test score of the m first test areas of the kth sample fastener; Determining a first standard deviation based on the average local corrosion resistance test score; An overall corrosion resistance uniformity test score of the current batch of fasteners is determined according to the first standard deviation and the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener.

6. The method for detecting uniformity of barrel plating of deep hole blind hole fasteners according to claim 5, characterized in that: Determining an overall corrosion resistance uniformity test score of the current batch of fasteners according to the first standard deviation and the local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener, comprising: According to the formula ， Determine the overall corrosion uniformity test score for the current batch of fasteners , where if is a conditional function, is the preset threshold, is the preset multiple, The local corrosion resistance test score of the i-th first test area of ​​the k-th sample fastener is, is the first standard deviation, n is the number of the first test areas, i≤n, K is the number of sample fasteners, k≤K, and i, n, k and K are all positive integers.

7. A deep hole blind hole fastener barrel plating uniformity detection system for executing the deep hole blind hole fastener barrel plating uniformity detection method according to claim 1, characterized in that: include: A sampling module, used for sampling the fasteners in the current batch to obtain a plurality of sample fasteners; A sampling point module, used to set a plurality of first sampling points at preset positions of the sample fastener, and determine a first preset weight value of each first sampling point; A coating thickness module, used to obtain the coating thickness at each first sampling point; A thickness uniformity module, used to determine an overall coating thickness uniformity detection score according to the coating thickness and the first preset weight; An initial data module, used to obtain the initial weight of each sample fastener at the beginning of the corrosion resistance test cycle; A corrosion test module, used to obtain test data at multiple moments in the corrosion resistance test cycle, wherein the test data includes: test weight, corrosion current density, test temperature, test humidity and test salt concentration; A corrosion resistance uniformity module, for determining an overall corrosion resistance uniformity detection score based on the initial weight and the test data; An overall detection scoring module, used to determine an overall fastener barrel plating uniformity detection score according to the overall coating thickness uniformity detection score and the overall corrosion resistance uniformity detection score; The test report module is used to generate a test report based on the overall fastener roll plating uniformity test score.

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