A contact stress analysis method and system based on connection components

Abstract

The invention discloses a contact stress analysis method and system based on a connection component, belonging to the technical field of stress measurement and analysis, and comprising the following steps: obtaining appearance performance parameters of the connection component, analyzing to obtain the shape fitness of the connection component, and comparing with a preset shape fitness threshold to obtain a shape fitness result; executing corresponding shaping control to obtain the shape fitness of an adaptation stress analysis component; dividing the adaptation stress analysis component into a plurality of combined components, obtaining a static stress evaluation index of each combined component, thereby analyzing to obtain a static stress distribution uniformity index of the adaptation stress analysis component; obtaining a static test stress result, thereby obtaining a specified static evaluation influencing factor; obtaining a comprehensive stress evaluation result and outputting it for display, thereby solving the problem of uneven stress distribution caused by the shape fitness of the connection component in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of stress measurement and analysis, and in particular to a contact stress analysis method and system based on connecting components. Background Art

[0002] With the rapid development of industry, connecting components are widely used. However, due to the uneven stress distribution of connecting components, serious damage to parts occurs. Therefore, stress distribution detection of connecting components is particularly important. The existing connecting component stress detection system measures the deformation of the connecting components and then converts the deformation signal into an electrical signal to perform stress analysis.

[0003] For example, the invention patent with announcement number: CN108917997B announces a stress detection system for connecting components suitable for narrow spaces, including: a stress measuring mechanism; a stress monitoring mechanism and a connecting structure; when the mechanical connecting component is subjected to stress, it deforms, and since the two ends of the deformation measuring component are fixed within the effective force range of the mechanical connecting component, the deformation measuring component will deform in proportion to the mechanical connecting component, and the deformation of the deformation measuring component can be converted into an electrical signal for transmission, and through the comprehensive action of the integrated data input and output port, the signal converter, and the calibration recording component, the stress condition of the mechanical connecting component can be obtained according to the relevant equations and displayed on the terminal processing controller to complete the stress monitoring function.

[0004] For example, a bolt stress detection device announced in the invention patent with announcement number: CN106500882B includes: a cylinder shell, a push-pull rod, a sensor shell, a support body and a spring; the cylinder shell includes a peripheral side wall and a support plate fixedly connected to the inner side of the peripheral side wall, and a through groove is arranged on the support plate; the support body is slidably connected in the through groove of the support plate along the axial direction of the cylinder shell, and extrusion surfaces arranged in an oblique and symmetrical manner are arranged on opposite sides of the support body; the lower end of the push-pull rod is fastened to the top of the support body, and the upper end of the push-pull rod extends out of the cylinder shell; there are two sensor shells and they are symmetrically arranged, and both sensor shells are slidably connected in the through groove of the support plate along the radial direction of the cylinder shell, and a rolling pressure-bearing component is arranged on the inner side of each sensor shell, and each rolling pressure-bearing component is in contact with an extrusion surface; there are two springs, and each spring is arranged between the outer side of a sensor shell and the peripheral side wall of the cylinder shell.

[0005] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems:

[0006] In the prior art, existing stress detection systems often only perform stress assessment on connecting components. However, connecting components often have some minor appearance defects during the production process, and these defects will have a huge impact on the overall performance of the connecting components. Therefore, directly performing stress assessment will not only lead to large errors in the actual assessed stress, but also cause a waste of resources. Summary of the invention

[0007] The embodiments of the present application provide a contact stress analysis method and system based on a connecting component, thereby solving the problem of uneven stress distribution caused by the shape mismatch of the connecting component in the prior art and achieving precise control of the shape adaptation of the connecting component.

[0008] The embodiment of the present application provides a contact stress analysis method based on a connection component, comprising the following steps: obtaining appearance performance parameters of the connection component, analyzing to obtain the shape adaptability of the connection component, and comparing it with a preset shape adaptability threshold to obtain a shape adaptability result; based on the shape adaptability result, performing corresponding shaping control, recording the connection component as an adaptation stress analysis component after the shaping control, and analyzing again to obtain the shape adaptability of the adaptation stress analysis component; dividing the adaptation stress analysis component into a number of combined components, obtaining and analyzing the static stress parameters of each combined component, obtaining the static stress evaluation index of each combined component, and thereby analyzing to obtain the static stress distribution uniformity index of the adaptation stress analysis component; comparing the static stress distribution uniformity index of the adaptation stress analysis component with a preset stress reference index to obtain a static test stress result, and thereby obtaining a specified static evaluation influencing factor; performing dynamic stress analysis on the adaptation stress analysis component within a preset time period, and performing a comprehensive evaluation in combination with the specified static evaluation influencing factor and the shape adaptability of the adaptation stress analysis component, obtaining a comprehensive stress evaluation result and outputting it for display.

[0009] Furthermore, the method of obtaining appearance performance parameters of the connecting component and analyzing them to obtain the shape adaptability of the connecting component specifically includes: obtaining the appearance performance parameters of the connecting component, the appearance performance parameters of the connecting component including: the average key tooth width, average key tooth height, average key tooth spacing, key tooth top fillet radius and key tooth root fillet radius of the connecting component; obtaining a preset appearance performance benchmark set in a database, the appearance performance benchmark set including a key tooth width benchmark value, a key tooth height benchmark value, a key tooth spacing benchmark value, a key tooth top fillet radius benchmark value and a key tooth root fillet radius benchmark value; obtaining a shape adaptation index based on the appearance performance parameters of the connecting component and analyzing it with the appearance performance benchmark set.

[0010] Furthermore, the shape adaptation result is obtained, specifically including: obtaining a shape adaptation threshold preset in a database, and analyzing it with a shape adaptation index; if the shape adaptation index is above the shape adaptation threshold, the shape adaptation result is shape adaptation; if the shape adaptation index is less than the shape adaptation threshold, the shape adaptation result is shape mismatch; the shape adaptation index is used to characterize the degree of appearance adaptation of the connecting component.

[0011] Furthermore, the static stress parameters of each assembly are obtained and analyzed to obtain a static stress evaluation index of each assembly, and the static stress distribution uniformity index of the adaptive stress analysis component is obtained by analysis, specifically including: the static stress parameters of each assembly include material density, material thermal conductivity, surface roughness and material hardness of each assembly; a connection component reference set preset in a database is obtained, the connection component reference set includes a material density reference value, a material thermal conductivity reference value, a surface roughness reference value and a material hardness reference value; the static stress parameters of each assembly are analyzed with the connection component reference set to obtain a static stress evaluation index of each assembly; analysis is performed according to the static stress evaluation index of each assembly to obtain a static stress distribution uniformity index of the adaptive stress analysis component; the static stress evaluation index of each assembly is used to characterize the static stress value of each assembly; the static stress distribution uniformity index of the adaptive stress analysis component is used to characterize the degree of static stress distribution uniformity of the adaptive stress analysis component.

[0012] Furthermore, the static stress evaluation index of each assembly component is obtained by:

[0013] ;

[0014] In the formula, represents the static stress evaluation index of the i-th component, i represents the number of the component, , represents the total number of components, e represents a natural constant, represents the material density of the ith component, Indicates the reference value of material density. represents the material thermal conductivity of the i-th component, Indicates the reference value of thermal conductivity of the material, represents the surface roughness of the i-th component, Indicates the reference value of surface roughness, represents the material hardness of the i-th component, Indicates the reference value of material hardness.

[0015] Furthermore, the static stress distribution uniformity index of the adaptive stress analysis component is compared with a preset stress reference index to obtain a static test stress result. The specific method is: obtain the stress reference index preset in the database, and compare it with the static stress distribution uniformity index of the adaptive stress analysis component. If the static stress distribution uniformity index of the adaptive stress analysis component is greater than the stress reference index, the static test stress result is a static stress first state result; if the static stress distribution uniformity index of the adaptive stress analysis component is below the stress reference index, the static test stress result is a static stress second state result; the static test stress result is a static stress first state result or a static stress second state result.

[0016] Furthermore, the specific steps of obtaining the designated static assessment influencing factor include: obtaining a static stress first influencing factor corresponding to a static stress first state result and a static stress second influencing factor corresponding to a static stress second state result preset in a database; if the static test stress result is a static stress first state result, then using the static stress first influencing factor corresponding to the preset static stress first state result as the designated static assessment influencing factor; if the static test stress result is a static stress second state result, then using the static stress second influencing factor corresponding to the preset static stress second state result as the designated static assessment influencing factor.

[0017] Furthermore, the adaptive stress analysis component is subjected to dynamic stress analysis within a preset time period, and the specific steps include: setting a preset time period and performing simulated operation on the adaptive stress analysis component within the preset time period, and evenly distributing a number of stress sensing points on each combination component of the adaptive stress analysis component, obtaining stress sensing parameters of the adaptive stress analysis component during the simulated operation, including the maximum stress value and the minimum stress value of each stress sensing point of each combination component, thereby analyzing and obtaining a dynamic stress amplitude index; adjusting the misalignment angle between the adaptive stress analysis component and the connecting component, and obtaining the stress value of each stress sensing point of each combination component at each misalignment angle; and analyzing and obtaining a dynamic stress coupling index based on the stress value of each stress sensing point of each combination component at each misalignment angle; the dynamic stress amplitude index is used to characterize the magnitude of the dynamic stress amplitude to which the adaptive stress analysis component is subjected during the simulated operation; and the dynamic stress coupling index is used to characterize the magnitude of the dynamic stress coupling to which the adaptive stress analysis component is subjected during the simulated operation.

[0018] Furthermore, the comprehensive evaluation is performed in combination with the specified static evaluation influencing factors and the shape fitness of the adaptive stress analysis component to obtain a comprehensive stress evaluation result and output it for display. The specific steps include: performing analysis based on the dynamic stress amplitude index, the dynamic stress coupling index, the shape fitness of the adaptive stress analysis component and the specified static evaluation influencing factors to obtain a comprehensive stress evaluation index; obtaining a comprehensive stress evaluation threshold preset in the database and comparing it with the comprehensive stress evaluation index. If the comprehensive stress evaluation index is above the comprehensive stress evaluation threshold, the comprehensive stress evaluation result is that the comprehensive stress improvement is qualified; if the comprehensive stress evaluation index is less than the comprehensive stress evaluation threshold, the comprehensive stress evaluation result is that the comprehensive stress improvement is unqualified.

[0019] The embodiment of the present application provides a contact stress analysis system based on a connection component, characterized in that it includes: an appearance adaptation evaluation module, a modification evaluation module, a static stress distribution evaluation module, an impact judgment module and a comprehensive evaluation module; wherein the appearance adaptation evaluation module is used to obtain the appearance performance parameters of the connection component, analyze and obtain the appearance adaptation degree of the connection component, and compare it with a preset appearance adaptation threshold to obtain an appearance adaptation result; the modification evaluation module is used to perform corresponding modification control based on the appearance adaptation result, record the connection component as an adaptation stress analysis component after the modification control, and analyze again to obtain the appearance adaptation degree of the adaptation stress analysis component; the static stress distribution evaluation module is used to convert the adaptation result into an adaptation result; The stress analysis component is divided into several combined components, and the static stress parameters of each combined component are obtained and analyzed to obtain the static stress evaluation index of each combined component, thereby analyzing and obtaining the static stress distribution uniformity index of the adaptive stress analysis component; the impact judgment module is used to compare the static stress distribution uniformity index of the adaptive stress analysis component with the preset stress reference index to obtain the static test stress result, thereby obtaining the specified static evaluation influence factor; the comprehensive evaluation module is used to perform dynamic stress analysis on the adaptive stress analysis component within a preset time period, and conduct a comprehensive evaluation in combination with the specified static evaluation influence factor and the shape adaptability of the adaptive stress analysis component to obtain the comprehensive stress evaluation result and output it for display.

[0020] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0021] 1. The present invention provides a contact stress analysis method based on a connecting component, which obtains the appearance performance parameters of the connecting component and compares them with a preset shape adaptation threshold, thereby obtaining the shape adaptation of the connecting component, thereby achieving precise control of the shape adaptation of the connecting component, and effectively solving the problem of uneven stress distribution caused by the shape mismatch of the connecting component in the prior art.

[0022] 2. The present invention divides the adaptive stress analysis component into several combined components, obtains the static stress parameters of each combined component for analysis, and obtains the static stress evaluation index of each combined component, thereby adapting the uniformity of the static stress distribution of the stress analysis component, thereby realizing the static stress uniformity analysis of the connecting components, and improving the accuracy and reliability of the contact stress test.

[0023] 3. By performing dynamic stress analysis on the adaptive stress analysis component within a preset time period and conducting a comprehensive evaluation in combination with the static stress evaluation influencing factors, a comprehensive stress evaluation result is obtained, thereby achieving a comprehensive evaluation of the contact stress of the connection components. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of the method provided in the embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of the external spline key teeth after modification;

[0026] Figure 3 The comparison curve of the involute spline pair under different angular misalignment before and after modification;

[0027] Figure 4 A structural diagram of a system provided in an embodiment of the present application;

[0028] Figure 5 This is the stress diagram of the involute spline pair when the misalignment angle is 0 before the spline is assembled and reshaped;

[0029] Figure 6 This is the stress diagram of the involute spline pair when the misalignment angle is 0 before the external spline is modified;

[0030] Figure 7 This is the stress diagram of the involute spline pair when the misalignment angle is 0 before the internal spline is modified;

[0031] Figure 8 This is the stress diagram of the involute spline pair when the misalignment angle is 0 after the spline is assembled and reshaped;

[0032] Fig. 9 This is the stress diagram of the involute spline pair when the misalignment angle is 0 after the external spline is modified;

[0033] Fig.10 This is the stress diagram of the involute spline pair when the misalignment angle is 0 after the internal spline is modified. DETAILED DESCRIPTION

[0034] The embodiments of the present application provide a contact stress analysis method and system based on connecting components, thereby solving the problem of uneven stress distribution caused by the shape mismatch of connecting components in the prior art and achieving precise control of the shape adaptation of connecting components.

[0035] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] like Figure 1 As shown, it is a flow chart of a contact stress analysis method based on a connection component provided by an embodiment of the present application, the method comprising the following steps: obtaining appearance performance parameters of the connection component, analyzing to obtain the shape adaptability of the connection component, and comparing it with a preset shape adaptability threshold to obtain a shape adaptability result; based on the shape adaptability result, performing corresponding shaping control, recording the connection component as an adaptation stress analysis component after the shaping control, and analyzing again to obtain the shape adaptability of the adaptation stress analysis component; dividing the adaptation stress analysis component into a number of combined components, obtaining and analyzing the static stress parameters of each combined component, obtaining the static stress evaluation index of each combined component, and thereby analyzing to obtain the static stress distribution uniformity index of the adaptation stress analysis component; comparing the static stress distribution uniformity index of the adaptation stress analysis component with a preset stress reference index, obtaining a static test stress result, and thereby obtaining a specified static evaluation influencing factor; performing dynamic stress analysis on the adaptation stress analysis component within a preset time period, and performing a comprehensive evaluation in combination with the specified static evaluation influencing factor and the shape adaptability of the adaptation stress analysis component, obtaining a comprehensive stress evaluation result and outputting it for display.

[0037] In this embodiment, the static stress analysis process includes core parameters such as material density, thermal conductivity, surface roughness and hardness, and also introduces a comparative analysis of the static stress distribution uniformity index and the stress benchmark index. The dynamic stress analysis module reveals the stress change law of the component during dynamic operation through the distribution of stress sensing points and the calculation of the dynamic stress amplitude index and coupling index, providing a key basis for the optimization design of dynamic performance. The comprehensive evaluation module combines the shape adaptability, static evaluation influencing factors and dynamic stress evaluation results to quickly judge the quality of the component stress performance, and can also achieve target optimization design and manufacturing parameter adjustment based on the analysis results, thereby improving the quality of the product.

[0038] Based on the shape adaptation result, the corresponding shaping control is performed. The specific method is: if the shape adaptation result is that the shape is not suitable, a shape modification instruction is issued, the shaping step length preset in the database is obtained, and the shaping process is performed step by step according to the preset shaping step length until the shape adaptation result after modification is that the shape is suitable. The schematic diagram of the external spline key tooth after modification is as follows: Figure 2As shown, where XG represents the modification amount of the connecting part.

[0039] Furthermore, the appearance performance parameters of the connection component include: an average key tooth width, an average key tooth height, an average key tooth spacing, a key tooth top fillet radius and a key tooth root fillet radius of the connection component.

[0040] In this embodiment, it should be noted that the average key tooth width, average key tooth height, average key tooth spacing, key tooth top fillet radius and key tooth root fillet radius of the connecting component can be obtained by automatically taking pictures of the connecting component and then using specific image recognition software (such as ABBYY FineReader). The appearance adaptation result is obtained by analyzing the appearance performance parameters of the connecting component (average key tooth width, average key tooth height, average key tooth spacing, key tooth top fillet radius and key tooth root fillet radius), taking into account the mutual influence relationship between these parameters, for example: if the average key tooth width is too wide, the average key tooth spacing will be reduced, affecting the tightness and stability of the connection, the average key tooth height affects the bearing capacity and stability of the connection, insufficient height will cause loose connection, and too high will increase the difficulty of assembly. The rationality of the average key tooth spacing is crucial to ensure the correct engagement between the connecting components. Too small a spacing may cause assembly difficulties or even damage the connecting component; too large a spacing may reduce the stability of the connection, and the size of the fillet radius at the top of the key tooth affects the smoothness and wear resistance of the connection. The appropriate fillet radius helps reduce stress concentration and extend the service life of the connected parts. The root fillet radius of the key teeth is related to the strength and toughness of the connection. Too large a root fillet radius will weaken the bearing capacity of the key teeth, while too small a radius will increase the risk of fracture.

[0041] Furthermore, the shape adaptability of the connecting component is obtained and compared with a preset shape adaptability threshold to obtain a shape adaptability result, specifically including: obtaining a preset appearance performance benchmark set in a database, the appearance performance benchmark set including a key tooth width benchmark value, a key tooth height benchmark value, a key tooth spacing benchmark value, a key tooth top fillet radius benchmark value and a key tooth root fillet radius benchmark value; obtaining a shape adaptability index based on the appearance performance parameters of the connecting component and analyzing with the appearance performance benchmark set; obtaining a shape adaptability threshold preset in the database and analyzing with the shape adaptability index, if the shape adaptability index is above the shape adaptability threshold, the shape adaptability result is shape adaptability, and if the shape adaptability index is less than the shape adaptability threshold, the shape adaptability result is shape mismatch; the shape adaptability index is used to characterize the appearance adaptability of the connecting component.

[0042] In this embodiment, the shape adaptation index is obtained by: ;

[0043] Represents the appearance adaptation index, Indicates the average key width of the connected parts, Indicates the reference value of key tooth width. represents the average key tooth height of the connected parts, Indicates the key tooth height reference value, It represents the average key tooth spacing of the connected parts. Indicates the reference value of key tooth spacing. Indicates the fillet radius of the key tooth top of the connection part. Indicates the reference value of the fillet radius at the top of the key tooth. Indicates the fillet radius of the key tooth root of the connection part. It represents the reference value of the fillet radius at the root of the key tooth, and e represents a natural constant.

[0044] Furthermore, the static stress parameters of each assembly are obtained and analyzed to obtain the static stress evaluation index of each assembly, and the static stress distribution uniformity index of the adaptive stress analysis component is obtained by analysis, specifically including: the static stress parameters of each assembly include the material density, material thermal conductivity, surface roughness and material hardness of each assembly; the connection component reference set preset in the database is obtained, and the connection component reference set includes a material density reference value, a material thermal conductivity reference value, a surface roughness reference value and a material hardness reference value; the static stress parameters of each assembly are analyzed with the connection component reference set to obtain the static stress evaluation index of each assembly; according to the static stress evaluation index of each assembly, the static stress distribution uniformity index of the adaptive stress analysis component is obtained; the static stress evaluation index of each assembly is used to characterize the static stress value of each assembly; the static stress distribution uniformity index of the adaptive stress analysis component is used to characterize the degree of static stress distribution uniformity of the adaptive stress analysis component.

[0045] In this embodiment, it should be noted that the material density of each component can be obtained by non-destructively measuring the spline using a density meter. The thermal conductivity of the material can be measured using a thermal conductivity tester, the surface roughness can be measured by selecting a surface roughness measuring instrument suitable for the spline structure, such as a portable measuring instrument or a measuring instrument with a special probe, and the material hardness can be measured by a Brinell hardness tester, a Rockwell hardness tester, or a Vickers hardness tester.

[0046] Furthermore, the static stress evaluation index of each combined component is obtained, and the specific method is as follows:

[0047] ;

[0048] In the formula, represents the static stress evaluation index of the i-th component, i represents the number of the component, , represents the total number of components, e represents a natural constant, represents the material density of the ith component, Indicates the reference value of material density. represents the material thermal conductivity of the i-th component, Indicates the reference value of thermal conductivity of the material, represents the surface roughness of the i-th component, Indicates the reference value of surface roughness, represents the material hardness of the i-th component, Indicates the reference value of material hardness.

[0049] In this embodiment, it should be noted that the static stress evaluation index of each component is obtained by analyzing the material density, material thermal conductivity, surface roughness and material hardness of each component, taking into account the mutual influence relationship between these parameters, for example: the material density affects the mass and inertia of the component, and then affects its response and stability when subjected to force. Density is related to the thermal conductivity of the material, and thermal conductivity usually increases with increasing density, thereby affecting the thermal stress distribution of the component. The thermal conductivity of the material determines the magnitude of the thermal stress of the component when the temperature changes. Materials with high thermal conductivity can transfer heat faster, thereby reducing the thermal stress caused by the temperature gradient. Rough surfaces can cause stress concentration and increased wear. Materials with high hardness have better wear resistance and fatigue resistance, and can withstand greater static stress without deformation.

[0050] It should be noted that materials with high density have greater mass and inertia, resulting in smaller deformation of parts with high density under the same static stress, but greater stress. Materials with high thermal conductivity can transfer heat faster, thereby reducing thermal stress caused by temperature gradients. In static stress assessment, parts with high thermal conductivity will show lower thermal stress levels. The higher the hardness of the material, the stronger the deformation resistance of the part under static stress, and the higher the static stress assessment index.

[0051] Furthermore, the static stress distribution uniformity index of the adaptive stress analysis component is compared with the preset stress reference index to obtain the static test stress result. The specific method is: obtain the preset stress reference index in the database, and compare it with the static stress distribution uniformity index of the adaptive stress analysis component. If the static stress distribution uniformity index of the adaptive stress analysis component is greater than the stress reference index, the static test stress result is the static stress first state result; if the static stress distribution uniformity index of the adaptive stress analysis component is below the stress reference index, the static test stress result is the static stress second state result; the static test stress result is the static stress first state result or the static stress second state result.

[0052] In this embodiment, the static stress distribution uniformity index of the adaptive stress analysis component is obtained by:

[0053] ;

[0054] In the formula, Indicates the static stress distribution uniformity index of the adaptive stress analysis component. represents the static stress evaluation index of the i-th component, i represents the number of the component, , represents the total number of combined components, and e represents a natural constant.

[0055] By comparing the static stress distribution uniformity index of the adaptive stress analysis component with the preset stress benchmark index, the static stress performance state of the component can be accurately judged, providing an important basis for subsequent analysis and optimization. It can quickly distinguish the static stress first state results from the static stress second state results, simplifying the evaluation process of static stress performance and improving analysis efficiency. The preset stress benchmark index in the database is used as the comparison standard to ensure the scientificity and consistency of the test results.

[0056] Through this step, designers can quickly identify whether the static stress distribution of the component meets the design goals and take optimization measures in time, thereby reducing unnecessary testing and adjustment costs.

[0057] Further, the specified static assessment impact factor is obtained, and the specific steps include:

[0058] Obtain a static stress first influence factor corresponding to a static stress first state result and a static stress second influence factor corresponding to a static stress second state result preset in a database; if the static test stress result is a static stress first state result, the static stress first influence factor corresponding to the preset static stress first state result is used as the designated static assessment influence factor; if the static test stress result is a static stress second state result, the static stress second influence factor corresponding to the preset static stress second state result is used as the designated static assessment influence factor.

[0059] Furthermore, a dynamic stress analysis is performed on the adaptive stress analysis component within a preset time period, and the specific steps include: setting a preset time period and performing simulated operation on the adaptive stress analysis component within the preset time period, and evenly distributing a number of stress sensing points on each combination component of the adaptive stress analysis component, obtaining stress sensing parameters of the adaptive stress analysis component during the simulated operation, including the maximum stress value and the minimum stress value of each stress sensing point of each combination component, and analyzing and obtaining a dynamic stress amplitude index; adjusting the misalignment angle between the adaptive stress analysis component and the connecting component to obtain the stress value of each stress sensing point of each combination component at each misalignment angle; analyzing and obtaining a dynamic stress coupling index based on the stress value of each stress sensing point of each combination component at each misalignment angle; the dynamic stress amplitude index is used to characterize the size of the dynamic stress amplitude to which the adaptive stress analysis component is subjected during the simulated operation; and the dynamic stress coupling index is used to characterize the size of the dynamic stress coupling to which the adaptive stress analysis component is subjected during the simulated operation.

[0060] In this embodiment, it should be noted that the specific steps of setting a preset period and simulating the operation of the adaptive stress analysis component within the preset period include: simulating the operation of the adaptive stress analysis component within the preset period. The simulation operation can be obtained by simulation using computer simulation software. Figure 5 , Figure 6 and Figure 7 As shown, Figure 5 This is the stress diagram of the involute spline pair when the misalignment angle is 0 before the spline is assembled and reshaped. Figure 6 This is the stress diagram of the involute spline pair when the misalignment angle is 0 before the external spline is modified. Figure 7 This is the stress diagram of the involute spline pair before the internal spline is modified when the misalignment angle is 0. The stress cloud diagram of the involute spline pair after modification is as follows: Figure 8 , Fig. 9 and Fig.10 As shown, Figure 8 This is the stress diagram of the involute spline pair when the misalignment angle is 0 after the spline assembly and modification. Fig. 9 This is the stress diagram of the involute spline pair when the misalignment angle is 0 after the external spline is modified. Fig.10 This is the stress diagram of the involute spline pair when the misalignment angle is 0 after the internal spline is modified.

[0061] like Figure 3 The following is a comparison curve of the involute spline pair before and after modification under different angular misalignment. Figure 3 It can be seen that the stress on the connecting parts at different misalignment angles before and after the modification is significantly reduced by the modification.

[0062] according to Figure 3 , Figure 5 , Figure 6 , Figure 7 Respectively Figure 8 , Fig. 9 and Fig.10 Comprehensive analysis shows that the uneven axial stress distribution of the involute spline has been significantly improved after modification, and the stress concentration at the torque input end of the external spline has been significantly alleviated, especially under angular misalignment. The modification effect is remarkable, so this modification method is feasible.

[0063] It should be noted that the working state, external load and environmental factors of the stress analysis component need to be adapted during operation. Several stress sensing points are evenly arranged on each component of the stress analysis component. The arrangement of stress sensing points can ensure that stress change data of different parts can be accurately collected during the simulation operation. During the simulation operation, stress data of each stress sensing point is collected, including the maximum stress value and minimum stress value on each sensing point. The maximum and minimum values ​​represent the range of stress changes within the preset time period, which can effectively reflect the stress response of the component under dynamic conditions.

[0064] It should be noted that the allowable stress extreme value deviation preset in the database is obtained, and analyzed with the maximum stress value and the minimum stress value of each stress sensing point of each component, to obtain the dynamic stress amplitude index. The specific method for obtaining the dynamic stress amplitude index is as follows:

[0065] ;

[0066] In the formula, represents the dynamic stress amplitude index, e represents the natural constant, represents the maximum stress value of the jth stress sensing point of the i-th component, i represents the number of the component, , represents the total number of combined components, j represents the number of stress sensing points, , represents the total number of stress sensing points, represents the minimum stress value of the jth stress sensing point of the i-th component, Indicates the allowable deviation from the stress extreme value.

[0067] The dynamic stress coupling index is obtained by:

[0068] ;

[0069] represents the dynamic stress coupling index, It represents the stress value of the jth stress sensing point of the i-th combined component at the k-th misalignment angle, where j represents the number of the stress sensing point. , represents the total number of stress sensing points, i represents the number of the combined component, , represents the total number of combined components, k represents the number of misalignment angles, , Indicates the maximum misalignment angle, It represents the stress reference value at the kth misalignment angle.

[0070] Furthermore, a comprehensive evaluation is performed in combination with the specified static evaluation influencing factors and the shape fitness of the adaptive stress analysis component to obtain a comprehensive stress evaluation result and output it for display. The specific steps include: performing analysis based on the dynamic stress amplitude index, the dynamic stress coupling index, the shape fitness of the adaptive stress analysis component and the specified static evaluation influencing factors to obtain a comprehensive stress evaluation index; obtaining a comprehensive stress evaluation threshold preset in the database and comparing it with the comprehensive stress evaluation index. If the comprehensive stress evaluation index is above the comprehensive stress evaluation threshold, the comprehensive stress evaluation result is that the comprehensive stress improvement is qualified. If the comprehensive stress evaluation index is less than the comprehensive stress evaluation threshold, the comprehensive stress evaluation result is that the comprehensive stress improvement is unqualified.

[0071] In this embodiment, the comprehensive stress evaluation index is obtained by:

[0072] ;

[0073] represents the comprehensive stress assessment index, represents the dynamic stress amplitude index, represents the dynamic stress coupling index, Indicates the shape fitness of the stress analysis component. Represents the specified static assessment impact factor, and e represents a natural constant.

[0074] like Figure 4As shown, it is a structural schematic diagram of a contact stress analysis system based on a connection component provided in an embodiment of the present application. A contact stress analysis system based on a connection component provided in an embodiment of the present application includes: an appearance adaptation evaluation module, a modification evaluation module, a static stress distribution evaluation module, an impact judgment module and a comprehensive evaluation module; wherein the appearance adaptation evaluation module is used to obtain the appearance performance parameters of the connection component, analyze and obtain the appearance adaptation degree of the connection component, and compare it with a preset appearance adaptation threshold to obtain the appearance adaptation result; the modification evaluation module is used to perform corresponding modification control based on the appearance adaptation result, record the connection component as an adaptation stress analysis component after the modification control, and analyze again to obtain the appearance adaptation degree of the adaptation stress analysis component; The dynamic stress distribution evaluation module is used to divide the adaptive stress analysis component into several combined components, obtain the static stress parameters of each combined component and analyze them, obtain the static stress evaluation index of each combined component, and thereby obtain the static stress distribution uniformity index of the adaptive stress analysis component; the impact judgment module is used to compare the static stress distribution uniformity index of the adaptive stress analysis component with the preset stress reference index, obtain the static test stress result, and thereby obtain the specified static evaluation influence factor; the comprehensive evaluation module is used to perform dynamic stress analysis on the adaptive stress analysis component within a preset time period, and perform a comprehensive evaluation in combination with the specified static evaluation influence factor and the shape adaptability of the adaptive stress analysis component, obtain the comprehensive stress evaluation result and output it for display.

[0075] To summarize, this embodiment obtains the appearance parameters of the connecting component and compares them with a preset shape adaptation threshold, thereby obtaining the shape adaptation of the connecting component, thereby achieving precise control of the shape adaptation of the connecting component, and effectively solving the problem of uneven stress distribution caused by the shape mismatch of the connecting component in the prior art.

[0076] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0077] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0078] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0079] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0080] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0081] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A contact stress analysis method based on connection parts, characterized in that: The following steps are involved: Obtaining appearance performance parameters of the connection component, analyzing to obtain the shape adaptation of the connection component, and comparing with a preset shape adaptation threshold to obtain a shape adaptation result; Based on the shape adaptation result, corresponding shape modification control is performed, after the shape modification control, the connection component is recorded as an adaptation stress analysis component, and the shape adaptation degree of the adaptation stress analysis component is analyzed again; The adaptive stress analysis component is divided into several combined components, and the static stress parameters of each combined component are obtained and analyzed to obtain the static stress evaluation index of each combined component, thereby analyzing and obtaining the static stress distribution uniformity index of the adaptive stress analysis component; Compare the static stress distribution uniformity index of the adaptive stress analysis component with the preset stress reference index to obtain the static test stress result, thereby obtaining the specified static evaluation influencing factor; Perform dynamic stress analysis on the adaptive stress analysis component within a preset time period, and conduct a comprehensive evaluation based on the specified static evaluation influencing factors and the shape fitness of the adaptive stress analysis component to obtain a comprehensive stress evaluation result and output it for display; The static stress parameters of each assembly component are obtained and analyzed to obtain the static stress evaluation index of each assembly component, and the static stress distribution uniformity index of the adaptive stress analysis component is obtained by analysis, specifically including: The static stress parameters of each assembly component include material density, material thermal conductivity, surface roughness and material hardness of each assembly component; Acquire a connection component reference set preset in a database, wherein the connection component reference set includes a material density reference value, a material thermal conductivity reference value, a surface roughness reference value, and a material hardness reference value; Analyze the static stress parameters of each combined component with the reference set of connected components to obtain the static stress evaluation index of each combined component; Analyze the static stress evaluation index of each combined component to obtain the static stress distribution uniformity index of the adaptive stress analysis component; The static stress evaluation index of each combined component is used to characterize the static stress value of each combined component; The static stress distribution uniformity index of the adaptive stress analysis component is used to characterize the uniformity of the static stress distribution of the adaptive stress analysis component.

2. A contact stress analysis method based on a connection component as claimed in claim 1, characterized in that: The obtaining of the appearance performance parameters of the connection component and analyzing to obtain the shape adaptability of the connection component specifically includes: Acquire appearance performance parameters of the connection component, wherein the appearance performance parameters of the connection component include: average key tooth width, average key tooth height, average key tooth spacing, key tooth top fillet radius, and key tooth root fillet radius of the connection component; Obtaining a preset appearance performance reference set in a database, wherein the appearance performance reference set includes a key tooth width reference value, a key tooth height reference value, a key tooth spacing reference value, a key tooth top fillet radius reference value, and a key tooth root fillet radius reference value; Based on the appearance performance parameters of the connection parts and the analysis with the appearance performance benchmark set, the shape adaptation index is obtained.

3. A contact stress analysis method based on a connection component as claimed in claim 2, characterized in that: The shape adaptation result is obtained, specifically including: Obtaining a preset shape adaptation threshold in the database, and analyzing it with the shape adaptation index; if the shape adaptation index is above the shape adaptation threshold, the shape adaptation result is shape adaptation; if the shape adaptation index is less than the shape adaptation threshold, the shape adaptation result is shape mismatch; The appearance adaptation index is used to characterize the appearance adaptation degree of the connecting component.

4. A contact stress analysis method based on a connection component as claimed in claim 1, characterized in that: The specific method for obtaining the static stress evaluation index of each combined component is as follows: ； In the formula, represents the static stress evaluation index of the i-th component, i represents the number of the component, , represents the total number of components, e represents a natural constant, represents the material density of the ith component, Indicates the reference value of material density. represents the material thermal conductivity of the i-th component, Indicates the reference value of thermal conductivity of the material, represents the surface roughness of the i-th component, Indicates the reference value of surface roughness, represents the material hardness of the i-th component, Indicates the reference value of material hardness.

5. A contact stress analysis method based on a connection component as claimed in claim 1, characterized in that: The static stress distribution uniformity index of the adaptive stress analysis component is compared with the preset stress reference index to obtain the static test stress result. The specific method is: Obtain the preset stress benchmark index in the database and compare it with the static stress distribution uniformity index of the adaptive stress analysis component. If the static stress distribution uniformity index of the adaptive stress analysis component is greater than the stress benchmark index, the static test stress result is the static stress first state result. If the static stress distribution uniformity index of the adaptive stress analysis component is below the stress benchmark index, the static test stress result is the static stress second state result. The static test stress result is a static stress first state result or a static stress second state result.

6. A contact stress analysis method based on a connection component as claimed in claim 1, characterized in that: The specific steps of obtaining the specified static assessment impact factor include: Obtaining a first influencing factor of static stress corresponding to a first state result of static stress and a second influencing factor of static stress corresponding to a second state result of static stress preset in a database; If the static test stress result is a static stress first state result, the static stress first influence factor corresponding to the preset static stress first state result is used as the designated static assessment influence factor; if the static test stress result is a static stress second state result, the static stress second influence factor corresponding to the preset static stress second state result is used as the designated static assessment influence factor.

7. A contact stress analysis method based on a connection component as claimed in claim 1, characterized in that: The step of performing dynamic stress analysis on the adaptive stress analysis component within a preset time period specifically includes: A preset time period is set and a simulated operation is performed on the adaptive stress analysis component within the preset time period, and a number of stress sensing points are evenly arranged on each combination component of the adaptive stress analysis component, and stress sensing parameters of the adaptive stress analysis component are obtained during the simulated operation, including the maximum stress value and the minimum stress value of each stress sensing point of each combination component, thereby analyzing and obtaining a dynamic stress amplitude index; Adjust the misalignment angle between the stress analysis component and the connection component to obtain the stress value of each stress sensing point of each combined component under each misalignment angle; The dynamic stress coupling index is obtained by analyzing the stress values ​​of each stress sensing point of each combined component at each misalignment angle; The dynamic stress amplitude index is used to characterize the dynamic stress amplitude to which the adaptive stress analysis component is subjected during simulation operation; The dynamic stress coupling index is used to characterize the magnitude of the dynamic stress coupling to which the adaptive stress analysis component is subjected during simulation operation.

8. A contact stress analysis method based on a connection component as claimed in claim 1, characterized in that: The step of performing a comprehensive evaluation in combination with the specified static evaluation influencing factors and the shape adaptability of the adaptive stress analysis component to obtain a comprehensive stress evaluation result and output it for display includes: Based on the dynamic stress amplitude index, dynamic stress coupling index, shape adaptability of the adaptive stress analysis component and the specified static assessment influencing factors, a comprehensive stress assessment index is obtained; The preset comprehensive stress assessment threshold in the database is obtained and compared with the comprehensive stress assessment index. If the comprehensive stress assessment index is above the comprehensive stress assessment threshold, the comprehensive stress assessment result is that the comprehensive stress improvement is qualified. If the comprehensive stress assessment index is less than the comprehensive stress assessment threshold, the comprehensive stress assessment result is that the comprehensive stress improvement is unqualified.

9. A system using the contact stress analysis method based on connection parts as described in any one of claims 1 to 8, characterized in that: include: Shape adaptation assessment module, shape modification assessment module, static stress distribution assessment module, impact determination module and comprehensive assessment module; The shape adaptation evaluation module is used to obtain the appearance performance parameters of the connection component, analyze and obtain the shape adaptation degree of the connection component, and compare it with the preset shape adaptation threshold to obtain the shape adaptation result; The modification evaluation module is used to perform corresponding modification control based on the shape adaptation result, record the connection component as an adaptation stress analysis component after the modification control, and analyze again to obtain the shape adaptation degree of the adaptation stress analysis component; The static stress distribution evaluation module is used to divide the adaptive stress analysis component into a number of combined components, obtain the static stress parameters of each combined component and analyze them to obtain the static stress evaluation index of each combined component, thereby analyzing and obtaining the static stress distribution uniformity index of the adaptive stress analysis component; The impact determination module is used to compare the static stress distribution uniformity index of the adaptive stress analysis component with the preset stress reference index to obtain the static test stress result, thereby obtaining the specified static evaluation impact factor; The comprehensive evaluation module is used to perform dynamic stress analysis on the adaptive stress analysis component within a preset time period, and to perform a comprehensive evaluation based on the specified static evaluation influencing factors and the shape adaptability of the adaptive stress analysis component to obtain a comprehensive stress evaluation result and output it for display.

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