A stamping part detection method and device based on pressure analysis, medium and equipment

Abstract

The application provides a stamping part detection method and device based on pressure analysis, a medium and equipment. The pressure data of a to-be-detected stamping part is acquired, a pressure transmission network topology graph is constructed, whether the pressure fluctuation amplitude of each region of the to-be-detected stamping part is too large is judged according to a pressure balance index of each region, and when the pressure fluctuation amplitude is small, whether the to-be-detected stamping part has defects and the defect degree are further determined according to the change amplitude of the pressure values between different regions. The quality of the to-be-detected stamping part can be objectively detected, and the detection accuracy can be improved by judging from two dimensions of multiple times and positions. Moreover, the defect degree of the to-be-detected stamping part can be determined according to the judgment index, thereby providing data support for subsequent adjustment and improvement.

Description

Technical Field

[0001] This application relates to the field of stamping parts inspection technology, specifically to a stamping parts inspection method, apparatus, medium, and equipment based on pressure analysis. Background Technology

[0002] Stamping is the first step in automobile manufacturing, using a stamping press to die-cast sheet metal parts into qualified structural components. During the stamping process, various factors can lead to substandard quality in the stamped structural components. Substandard stamped structural components affect the quality of the automobile; therefore, quality inspection of these components is necessary. The quality of a stamped structural component is determined by checking whether all areas of the component bear the same pressure. Equal pressure indicates a good structural component, while uneven pressure indicates poor quality.

[0003] Currently, quality inspection of stamped structural parts mainly relies on offline visual inspection and the blue lead method. Offline visual inspection involves experts observing the surface of the stamped structural parts for unevenness based on their experience. The blue lead method involves applying blue or red lead to the blank holder surface and judging whether the stress on the blank holder surface is uniform based on the coloring of the lead. Both of these inspection methods depend entirely on subjective judgment based on human experience, making it impossible to objectively and accurately assess the pressure-bearing capacity of different areas of the stamped structural parts. This hinders the monitoring and preventative management of high-pressure surfaces, resulting in inconsistent quality of stamped structural parts. Therefore, there is an urgent need for a method that can objectively and accurately assess the quality of stamped structural parts. Summary of the Invention

[0004] To address the aforementioned technical problems, this application is proposed. Embodiments of this application provide a method, apparatus, medium, and device for inspecting stamped parts based on pressure analysis.

[0005] According to one aspect of this application, a method for inspecting stamped parts based on pressure analysis is provided, comprising: acquiring pressure data of the stamped part to be inspected; wherein the pressure data includes pressure values ​​of multiple regions of the stamped part to be inspected at different times; constructing a pressure transmission network topology diagram of the stamped part to be inspected based on the pressure data; wherein the pressure transmission network topology diagram represents the pressure change trend among multiple regions of the stamped part to be inspected; calculating a pressure balance index for each region of the stamped part to be inspected; wherein the pressure balance index represents the fluctuation range of pressure values ​​within the corresponding region; if the pressure balance index of at least one region is less than a preset index threshold, then calculating a dynamic pressure transmission coefficient for that region based on the pressure transmission network topology diagram; wherein the dynamic pressure transmission coefficient represents the change range of pressure values ​​between different regions; and determining the degree of defect in the stamped part to be inspected based on the dynamic pressure transmission coefficient.

[0006] In one embodiment, obtaining the pressure data of the stamping part to be tested includes: dividing the stamping die into multiple regions and setting pressure balance blocks in the corresponding regions; using the stamping die to perform a stamping operation on the stamping part to be tested, and collecting pressure values ​​from multiple regions.

[0007] In one embodiment, constructing the pressure transmission network topology of the stamped part to be tested based on the pressure data includes: calculating the pressure propagation delay time between two adjacent regions; calculating the dynamic transmission coefficient between the two adjacent regions based on the pressure propagation delay time; determining the pressure transmission direction based on the dynamic transmission coefficient, and forming the pressure transmission network topology.

[0008] In one embodiment, calculating the pressure balance index of each region of the stamped part to be tested includes: the formula for calculating the pressure balance index is:

[0009] REI =1- (max(p_region)-min(p_region)) / mean(p_region) ;

[0010] in, REI As a pressure equilibrium index, p_region The average pressure of a single region at different times. max (p_region) and min(p_region) These represent the maximum and minimum average pressure values ​​for a single region at different times. mean(p_region) This represents the average pressure over different times in a single region.

[0011] In one embodiment, calculating the dynamic pressure transmission coefficient of the region based on the pressure transmission network topology includes: the formula for calculating the dynamic pressure transmission coefficient is:

[0012] ;

[0013] in, For the region i and region j Pressure propagation delay time between them For the region i In time t Pressure and area j In time The dynamic pressure transfer coefficient between pressures, For the region i In time t Pressure and area j In time The covariance between pressures, and They are respectively regions i Pressure standard deviation and regionj The standard deviation of pressure.

[0014] In one embodiment, determining the defect level of the stamping part to be inspected based on the dynamic pressure transmission coefficient includes: determining the defect level of the stamping part to be inspected and triggering the corresponding warning based on the dynamic pressure transmission coefficient and the coefficient range corresponding to multiple warning levels.

[0015] In one embodiment, the pressure analysis-based stamping part inspection method further includes: if there is no region where the pressure balance index is less than the preset index threshold, then the stamping part to be inspected is determined to be a qualified part.

[0016] According to another aspect of this application, a pressure analysis-based stamping part inspection device is provided, comprising: a pressure data acquisition module for acquiring pressure data of a stamping part to be inspected; wherein the pressure data includes pressure values ​​of multiple regions of the stamping part to be inspected at different times; a network topology construction module for constructing a pressure transmission network topology diagram of the stamping part to be inspected based on the pressure data; wherein the pressure transmission network topology diagram represents the pressure change trend among multiple regions of the stamping part to be inspected; a balance index calculation module for calculating a pressure balance index of each region of the stamping part to be inspected; wherein the pressure balance index represents the fluctuation range of pressure values ​​within the corresponding region; a transmission coefficient calculation module for calculating a dynamic pressure transmission coefficient of at least one region if the pressure balance index of at least one region is less than a preset index threshold; wherein the dynamic pressure transmission coefficient represents the change range of pressure values ​​between different regions; and a defect degree determination module for determining the defect degree of the stamping part to be inspected based on the dynamic pressure transmission coefficient.

[0017] According to another aspect of this application, a computer-readable storage medium is provided, the storage medium storing a computer program for performing any of the methods described above.

[0018] According to another aspect of this application, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; the processor being configured to perform any of the methods described above.

[0019] This application provides a method, apparatus, medium, and equipment for testing stamped parts based on pressure analysis. The method involves acquiring pressure data of the stamped part to be tested, including pressure values ​​of multiple regions of the stamped part at different times. Based on the pressure data, a pressure transmission network topology diagram of the stamped part is constructed, representing the pressure change trend among multiple regions of the stamped part. A pressure balance index is calculated for each region of the stamped part, representing the fluctuation range of pressure values ​​within that region. If the pressure balance index of at least one region is less than a preset index threshold, a dynamic pressure transmission coefficient for that region is calculated based on the pressure transmission network topology diagram. The dynamic pressure transmission coefficient represents the pressure variation trend among multiple regions of the stamped part. The method involves measuring the variation in pressure values ​​between different regions and determining the degree of defects in the stamped part under inspection based on the dynamic pressure transmission coefficient. Specifically, by acquiring pressure data from the stamped part and constructing a pressure transmission network topology, the method judges whether the pressure fluctuation is excessive based on the pressure balance index of each region. Furthermore, when the pressure fluctuation is small, the method further determines the presence and degree of defects based on the variation in pressure values ​​between different regions. This approach not only allows for objective quality inspection of the stamped part but also provides a multi-dimensional assessment from both time and location perspectives, improving inspection accuracy. Additionally, the method determines the degree of defects in the stamped part based on the assessment indicators, providing data support for subsequent adjustments and improvements. Attached Figure Description

[0020] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0021] Figure 1 This is a schematic flowchart of a pressure analysis-based stamping part inspection method provided in an exemplary embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the structure of the lower die of a stamping die provided in an exemplary embodiment of this application.

[0023] Figure 3 This is a schematic diagram of the structure of a stamping part inspection device based on pressure analysis provided in an exemplary embodiment of this application.

[0024] Figure 4 This is a structural diagram of an electronic device provided in an exemplary embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Lower die of stamping mold; 2. Balance block; 21. Special steel outer shell; 22. Bolt hole. Detailed Implementation

[0026] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0027] Figure 1 This is a schematic flowchart of a pressure analysis-based stamping part inspection method provided in an exemplary embodiment of this application. Figure 1 As shown, the pressure analysis-based stamping part inspection method includes the following steps:

[0028] Step 110: Obtain the pressure data of the stamping part to be tested.

[0029] The pressure data includes pressure values ​​of multiple areas of the stamped part under test at different times. This application transforms the detection of pressure values ​​in each area of ​​the stamped part under test into the detection of pressure borne by the balance block of the stamping die. This application can perform multiple die castings (e.g., 200 times). After each die casting, a set of data is recorded. The lower die of the stamping die is divided into a planar area, a transition area, and a high-stress area from the center to the perimeter. Dividing lines are used to further divide the lower die into multiple areas, where the planar area is one area, the transition area is divided into eight areas, and the high-stress area is divided into twelve areas. The pressure data of the stamped part under test is obtained by collecting the pressure borne by the balance block in the twelve areas of the high-stress area.

[0030] Step 120: Based on the pressure data, construct the pressure transmission network topology diagram of the stamping part to be tested.

[0031] The pressure transmission network topology diagram represents the pressure variation trend among multiple regions of the stamped part under test. Based on the collected pressure data, this application constructs a pressure transmission network topology diagram of the stamped part under test to clarify the pressure variation trend of the stamped part during the stamping process.

[0032] Step 130: Calculate the pressure balance index of each area of ​​the stamped part to be tested.

[0033] The pressure equalization index represents the fluctuation range of pressure values ​​within a corresponding region. This application calculates the pressure equalization index of each region of the stamped part under test to determine the magnitude of pressure fluctuations in each region of the stamped part during the stamping process.

[0034] Step 140: If the pressure balance index of at least one region is less than the preset index threshold, then calculate the dynamic pressure transmission coefficient of that region based on the pressure transmission network topology.

[0035] The dynamic pressure transmission coefficient represents the magnitude of pressure variation between different regions. If the pressure balance index of at least one region is less than a preset index threshold (e.g., 0.97), it indicates that the pressure value in that region fluctuates significantly. In this case, the dynamic pressure transmission coefficient of that region is further calculated to further determine whether there are defects in the stamped part under inspection from the perspective of pressure variation between adjacent regions.

[0036] Step 150: Determine the degree of defect in the stamping part to be inspected based on the dynamic pressure transmission coefficient.

[0037] Based on the dynamic pressure transmission coefficient, it is further determined whether there are defects in the stamping part to be inspected. When it is determined that there are defects in the stamping part to be inspected, the degree of defect in the stamping part to be inspected is further determined based on the magnitude of the dynamic pressure transmission coefficient, and a corresponding early warning is triggered.

[0038] This application provides a method for inspecting stamped parts based on pressure analysis. The method involves acquiring pressure data of the stamped part to be inspected, including pressure values ​​of multiple regions of the stamped part at different times. Based on the pressure data, a pressure transmission network topology diagram of the stamped part is constructed, representing the pressure variation trend among multiple regions of the stamped part. A pressure balance index is calculated for each region of the stamped part, representing the fluctuation range of pressure values ​​within that region. If the pressure balance index of at least one region is less than a preset threshold, a dynamic pressure transmission coefficient for that region is calculated based on the pressure transmission network topology diagram. The dynamic pressure transmission coefficient represents the pressure variation between different regions. The method involves measuring the variation range of pressure values ​​and determining the degree of defects in the stamped part under inspection based on the dynamic pressure transmission coefficient. Specifically, by acquiring the pressure data of the stamped part under inspection and constructing a pressure transmission network topology, the method judges whether the pressure fluctuation range is too large based on the pressure balance index of each region of the stamped part. Furthermore, when the pressure fluctuation range is small, the method further determines whether the stamped part under inspection has defects and the degree of defects based on the variation range of pressure values ​​between different regions. This approach not only allows for objective quality inspection of the stamped part but also provides a comprehensive assessment from multiple time and location dimensions, improving inspection accuracy. Additionally, the method determines the degree of defects in the stamped part based on the assessment indicators, providing data support for subsequent adjustments and improvements.

[0039] In one embodiment, step 110 can be implemented by dividing the stamping die into multiple regions and setting pressure balance blocks in the corresponding regions; using the stamping die to perform stamping operations on the stamping part to be tested, and collecting pressure values ​​from multiple regions.

[0040] Specifically, such as Figure 2As shown, this application provides multiple stamping strain sensors on the lower die 1 of the stamping die, which are located within the stamping die balance blocks 2. The lower die 1 has a total of 12 balance blocks (numbered 1-12 sequentially), evenly distributed around the upper perimeter of the lower die. Figure 2 The right side shows a schematic diagram of the counterweight 2. The counterweight includes a special steel outer shell 21 and a bolt hole 22 with a diameter of 20mm at its center. A bolt with a diameter of 20mm is screwed into the bolt hole 22, with the bolt head embedded in the bolt hole 22. When the mold is closed, the upper mold presses the counterweight 2 tightly, and the resulting pressure die-casts the sheet metal into a standardized part. Rubber strips with a diameter of 20mm are installed on the upper and lower sides of the stamping strain sensor. The upper end of the rubber strip extends 2mm beyond the upper surface of the counterweight 2. The stamping strain sensor is connected to a wire. Holes are drilled along the axial direction on the rubber strip and bolt on the lower side of the stamping strain sensor, and the wire is led out through the drilled holes. The other end of the wire is connected to a data acquisition terminal, which is connected to a computer via a wired connection. When the stamping machine is working, the upper die presses down on the balance block 2 to generate pressure. The rubber strip in the middle of the balance block 2 is pressed down and deformed. This force acts on the flexible stamping strain sensor, which records the strain data and transmits the data to the acquisition terminal through wires. The acquisition terminal sends the data to the computer in real time. The computer receives the strain data and converts it into pressure data storage through a formula, thus completing the pressure data acquisition.

[0041] In one embodiment, step 120 can be implemented as follows: calculating the pressure propagation delay time between two adjacent regions; calculating the dynamic transmission coefficient between the two adjacent regions based on the pressure propagation delay time; determining the pressure transmission direction based on the dynamic transmission coefficient, and forming a pressure transmission network topology.

[0042] This application determines the pressure propagation delay time between two adjacent regions by calculating the pressure propagation delay time, and calculates the dynamic transmission coefficient between the two adjacent regions based on the pressure propagation delay time. The pressure transmission direction is then determined based on the dynamic transmission coefficient, forming a pressure transmission network topology. Specifically, this application can calculate the dynamic transmission coefficient between all adjacent regions and select those with a dynamic transmission coefficient less than a set value (e.g., 15%) to form a pressure transmission direction, thereby constructing a pressure transmission network topology. If adjacent regions with a dynamic transmission coefficient less than the set value cannot form a complete transmission direction, or if adjacent regions with a dynamic transmission coefficient less than the set value cannot form the stamped part to be inspected, then the stamped part to be inspected is determined to have a quality defect.

[0043] The formula for calculating the pressure propagation delay time is as follows:

[0044] ;

[0045] in, Indicates the pressure propagation delay time. The correlation coefficient represents the pressure propagation delay. , P t_i and P t_j Representing regions i and j In time t Pressure Represents the computational region i and region j The pressure is t Correlation coefficient at time, This indicates the calculation of the optimal correlation coefficient. This indicates the signal length of the calculation area.

[0046] In one embodiment, step 130 can be specifically implemented as follows: the formula for calculating the pressure equilibrium index is:

[0047] REI =1- (max(p_region)-min(p_region)) / mean(p_region) ;

[0048] in, REI As a pressure equilibrium index, p_region The average pressure of a single region at different times. max (p_region) and min(p_region) These represent the maximum and minimum average pressure values ​​for a single region at different times. mean(p_region) This represents the average pressure over different times in a single region.

[0049] In one embodiment, step 140 can be specifically implemented as follows: the formula for calculating the dynamic pressure transmission coefficient is:

[0050] ;

[0051] in, For the region i and region j Pressure propagation delay time between them For the region i In time t Pressure and area j In time The dynamic pressure transfer coefficient between pressures, For the region i In time t Pressure and area j In time The covariance between pressures, and They are respectively regions i Pressure standard deviation and regionj The standard deviation of pressure.

[0052] In one embodiment, step 150 can be implemented by determining the degree of defect in the stamping part to be inspected and triggering the corresponding warning based on the dynamic pressure transmission coefficient and the coefficient range corresponding to multiple warning levels.

[0053] This application sets multiple coefficient ranges corresponding to different warning levels, and determines the degree of defect in the stamped part to be inspected and triggers the corresponding warning based on the relationship between the calculated dynamic pressure transmission coefficient and the corresponding range (whether it falls within the corresponding range). Specifically, this application can set three coefficient ranges: [15%, 30%), [30%, 50%), and [50%, +∞). If 15% ≤ dynamic pressure transmission coefficient < 30%, a level one warning is triggered; if 30% ≤ dynamic pressure transmission coefficient < 50%, a level two warning is triggered; and if 50% ≤ dynamic pressure transmission coefficient, a level three warning is triggered.

[0054] In one embodiment, the above-mentioned stamping part inspection method based on pressure analysis may further include: if there is no region where the pressure balance index is less than a preset index threshold, then the stamping part to be inspected is determined to be a qualified part.

[0055] If the pressure balance index of all regions is greater than or equal to the preset index threshold, it indicates that the pressure balance performance of each region is good. At this time, the stamping part to be tested can be determined to be a qualified part (i.e. there are no quality defects).

[0056] Figure 3 This is a schematic diagram of a pressure analysis-based stamping part inspection device provided in an exemplary embodiment of this application. Figure 3 As shown, the pressure analysis-based stamping part inspection device 30 includes: a pressure data acquisition module 31, used to acquire pressure data of the stamping part to be inspected; wherein the pressure data includes pressure values ​​of multiple regions of the stamping part to be inspected at different times; a network topology construction module 32, used to construct a pressure transmission network topology diagram of the stamping part to be inspected based on the pressure data; wherein the pressure transmission network topology diagram represents the pressure change trend among multiple regions of the stamping part to be inspected; a balance index calculation module 33, used to calculate the pressure balance index of each region of the stamping part to be inspected; wherein the pressure balance index represents the fluctuation range of the pressure value in the corresponding region; a transmission coefficient calculation module 34, used to calculate the dynamic pressure transmission coefficient of at least one region based on the pressure transmission network topology diagram if the pressure balance index of at least one region is less than a preset index threshold; wherein the dynamic pressure transmission coefficient represents the change range of the pressure value between different regions; and a defect degree determination module 35, used to determine the defect degree of the stamping part to be inspected based on the dynamic pressure transmission coefficient.

[0057] This application provides a method for inspecting stamped parts based on pressure analysis. The method involves a pressure data acquisition module 31 acquiring pressure data of the stamped part to be inspected, including pressure values ​​of multiple regions of the stamped part at different times. A network topology construction module 32 constructs a pressure transmission network topology diagram of the stamped part based on the pressure data, representing the pressure change trend among multiple regions of the stamped part. A balance index calculation module 33 calculates the pressure balance index of each region of the stamped part, representing the fluctuation range of pressure values ​​within the corresponding region. If the pressure balance index of at least one region is less than a preset index threshold, a transmission coefficient calculation module 34 calculates the dynamic pressure transmission coefficient of that region based on the pressure transmission network topology diagram. The dynamic pressure transmission coefficient represents the range of pressure value variation between different regions. The defect degree determination module 35 determines the defect degree of the stamped part under inspection based on the dynamic pressure transmission coefficient. That is, by acquiring the pressure data of the stamped part under inspection and constructing a pressure transmission network topology, it judges whether the pressure fluctuation range of each region of the stamped part under inspection is too large based on the pressure balance index. When the pressure fluctuation range is small, it further determines whether there is a defect and the degree of defect in the stamped part under inspection based on the range of pressure value variation between different regions. This not only allows for objective quality inspection of the stamped part under inspection, but also allows for judgment from multiple time and location dimensions to improve the accuracy of inspection. At the same time, it can also determine the degree of defect of the stamped part under inspection based on the judgment index, providing data support for subsequent adjustments and improvements.

[0058] In one embodiment, the pressure data acquisition module 31 can be further configured to: divide the stamping die into multiple regions and set pressure balance blocks in the corresponding regions; use the stamping die to perform stamping operations on the stamping part to be tested, and collect pressure values ​​from multiple regions.

[0059] In one embodiment, the network topology construction module 32 can be further configured to: calculate the pressure propagation delay time between two adjacent regions; calculate the dynamic transmission coefficient between two adjacent regions based on the pressure propagation delay time; determine the pressure transmission direction based on the dynamic transmission coefficient, and form a pressure transmission network topology.

[0060] In one embodiment, the aforementioned equilibrium index calculation module 33 can be further configured such that the formula for calculating the pressure equilibrium index is:

[0061] REI =1- (max(p_region)-min(p_region)) / mean(p_region) ;

[0062] in, REI As a pressure equilibrium index, p_region The average pressure of a single region at different times. max (p_region) and min(p_region) These represent the maximum and minimum average pressure values ​​for a single region at different times. mean(p_region) This represents the average pressure over different times in a single region.

[0063] In one embodiment, the aforementioned transmission coefficient calculation module 34 can be further configured such that the calculation formula for the dynamic pressure transmission coefficient is:

[0064] ;

[0065] in, For the region i and region j Pressure propagation delay time between them For the region i In time t Pressure and area j In time The dynamic pressure transfer coefficient between pressures, For the region i In time t Pressure and area j In time The covariance between pressures, and They are respectively regions i Pressure standard deviation and region j The standard deviation of pressure.

[0066] In one embodiment, the defect degree determination module 35 can be further configured to: determine the defect degree of the stamping part to be inspected and trigger the corresponding warning based on the dynamic pressure transmission coefficient and the coefficient range corresponding to the set multiple warning levels.

[0067] In one embodiment, the pressure analysis-based stamping part detection device 30 can be further configured to: if there is no region where the pressure balance index is less than a preset index threshold, then the stamping part to be tested is determined to be a qualified part.

[0068] Below, for reference Figure 4 This application describes an electronic device according to embodiments thereof. The electronic device may be either or both of a first device and a second device, or a standalone device independent of them, which may communicate with the first device and the second device to receive acquired input signals from them.

[0069] Figure 4 A block diagram of an electronic device according to an embodiment of this application is illustrated.

[0070] like Figure 4As shown, the electronic device 10 includes one or more processors 11 and memory 12.

[0071] The processor 11 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.

[0072] The memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may execute the program instructions to implement the methods of the various embodiments of this application described above and / or other desired functions. Various contents such as input signals, signal components, and noise components may also be stored in the computer-readable storage medium.

[0073] In one example, the electronic device 10 may also include an input device 13 and an output device 14, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0074] When the electronic device is a standalone device, the input device 13 can be a communication network connector for receiving the collected input signals from the first device and the second device.

[0075] In addition, the input device 13 may also include, for example, a keyboard, a mouse, etc.

[0076] The output device 14 can output various information to the outside, including determined distance information, direction information, etc. The output device 14 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0077] Of course, for the sake of simplicity, Figure 4 Only some of the components of the electronic device 10 relevant to this application are shown in this illustration; components such as buses, input / output interfaces, etc., are omitted. In addition, the electronic device 10 may include any other suitable components depending on the specific application.

[0078] In addition to the methods and apparatus described above, embodiments of this application may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the steps in the methods according to various embodiments of this application described in the "Exemplary Methods" section above.

[0079] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0080] Furthermore, embodiments of this application may also be computer-readable storage media storing computer program instructions thereon, which, when executed by a processor, cause the processor to perform the steps in the methods according to various embodiments of this application described in the "Exemplary Methods" section above.

[0081] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0082] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0083] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0084] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0085] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0086] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A method for detecting a press part based on pressure analysis, characterized by, The method comprises the following steps: acquiring pressure data of a stamping part to be detected, wherein the pressure data comprises pressure values of multiple regions of the stamping part to be detected at different times; constructing a pressure transmission network topology graph of the stamping part to be detected based on the pressure data, wherein the pressure transmission network topology graph represents pressure change trends between the multiple regions of the stamping part to be detected; calculating a pressure balance index of each region of the stamping part to be detected, wherein the pressure balance index represents a fluctuation amplitude of a pressure value in a corresponding region; if the pressure balance index of at least one region is less than a preset index threshold, calculating a dynamic pressure transmission coefficient of the region based on the pressure transmission network topology graph, wherein the dynamic pressure transmission coefficient represents a change amplitude of a pressure value between different regions; determining a defect degree of the stamping part to be detected based on the dynamic pressure transmission coefficient.

2. The method of claim 1, wherein, The acquiring of the pressure data of the stamping part to be detected comprises the following steps: dividing a stamping die into multiple regions, and arranging a pressure balance block in a corresponding region; performing a stamping operation on the stamping part to be detected by using the stamping die, and collecting pressure values of the multiple regions.

3. The method of claim 1, wherein, The constructing of the pressure transmission network topology graph of the stamping part to be detected based on the pressure data comprises the following steps: calculating a pressure propagation delay time between two adjacent regions; calculating a dynamic transmission coefficient between the two adjacent regions based on the pressure propagation delay time; determining a pressure transmission direction based on the dynamic transmission coefficient, and forming the pressure transmission network topology graph.

4. The method of claim 1, wherein, The calculating of the pressure balance index of each region of the stamping part to be detected comprises the following steps: The calculation formula of the pressure balance index is as follows: REI =1- (max(p_region)-min(p_region)) / mean(p_region) ； wherein, REI P is the pressure equalization index, p_region P is the average pressure of the individual zones at different times, max(p_ region) and min(p_region) Pmaxand Pminare the maximum and minimum values, respectively, of the average pressure of the individual zones at different times, mean (p_region) P is the mean of the average pressure of the individual zones at different times.

5. The method of claim 1, wherein, The calculating of the dynamic pressure transmission coefficient of the region based on the pressure transmission network topology graph comprises the following steps: The calculation formula of the dynamic pressure transmission coefficient is as follows: ； where is the pressure propagation delay time between regions i and regions j , is the dynamic pressure transfer coefficient between the pressure in region i at time t and the pressure in region j at time , is the covariance between the pressure in region i at time t and the pressure in region j at time , and are the pressure standard deviation in region i and the pressure standard deviation in region j , respectively.

6. The method of claim 1, wherein, The determining of the defect degree of the stamping part to be detected based on the dynamic pressure transmission coefficient comprises the following steps: determining the defect degree of the stamping part to be detected and triggering a corresponding early warning based on the dynamic pressure transmission coefficient and a coefficient interval corresponding to a plurality of preset early warning levels.

7. The method of claim 1, wherein, The stamping part detection method based on pressure analysis further comprises the following steps: if there is no region whose pressure balance index is less than the preset index threshold, determining that the stamping part to be detected is a qualified part.

8. A presswork inspection apparatus based on pressure analysis, characterized by, The method comprises the following steps: a pressure data acquisition module, configured to acquire pressure data of a stamping part to be detected, wherein the pressure data comprises pressure values of multiple regions of the stamping part to be detected at different times; a network topology construction module, configured to construct a pressure transmission network topology graph of the stamping part to be detected based on the pressure data, wherein the pressure transmission network topology graph represents pressure change trends between the multiple regions of the stamping part to be detected; An equalization index calculation module is configured to calculate a pressure equalization index of each region of the stamping part to be detected, wherein the pressure equalization index represents a fluctuation range of a pressure value in a corresponding region. A transfer coefficient calculation module is configured to calculate a dynamic pressure transfer coefficient of at least one region, based on the pressure transfer network topology, if the pressure equalization index of the at least one region is less than a preset index threshold, wherein the dynamic pressure transfer coefficient represents a change range of pressure values between different regions. A defect degree determination module is configured to determine a defect degree of the stamping part to be detected, based on the dynamic pressure transfer coefficient.

9. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, and the computer program is configured to execute the method in any one of claims 1-7.

10. An electronic device, comprising: Comprise: A processor; A memory for storing instructions executable by the processor; The processor is configured to execute the method in any one of claims 1-7.

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