Radial rivet pressing method and device

Abstract

The invention relates to the technical field of rivet installation, and provides a radial rivet pressing method and device.The radial rivet pressing method comprises the steps that the fit coefficient between a rivet and an installation hole site is calculated; calculating the shear strength of the rivet in the mounting part, and calculating the rivet impact force corresponding to the rivet; simulation models corresponding to the rivets and the installation parts are constructed respectively, a rivet simulation model and a part simulation model are obtained, the rivet simulation model and the part simulation model are subjected to simulation assembly processing, and part strain data and part yield force corresponding to the part simulation model and assembly result parameters corresponding to the rivets in the simulation assembly process are collected; calculating a part strain amplitude corresponding to the part simulation model, and calculating a part residual stress corresponding to the part simulation model; and press riveting process parameters corresponding to the rivet impact force are set, press riveting treatment of the rivet on the installation part is executed according to the press riveting process parameters, and a press riveting result is obtained. The invention aims to improve the connection effect of radial pressure riveting.

Description

Technical Field

[0001] The invention relates to the technical field of rivet installation, and in particular to a radial riveting method and device. Background Art

[0002] In modern manufacturing, the development of connection technology is crucial to improving product quality, performance and production efficiency. As industrial products have increasing requirements for connection strength, reliability and sealing, traditional connection methods such as welding and bolting have gradually exposed some limitations in certain application scenarios. Welding may cause changes in the material properties of the heat-affected zone; bolt connections are inconvenient to use when space is limited or frequent disassembly is required, and there may be a risk of loosening. Radial riveting has become an advanced connection method. By applying radial pressure to the rivet, the rivet undergoes plastic deformation, thereby achieving a tight connection of the connected parts. Compared with traditional connection methods, its connection effect is more stable and can withstand greater loads and vibrations.

[0003] The existing radial riveting is to use riveting equipment to perform riveting on rivets. The rivets and the connected parts are prepared, the rivets are inserted into the reserved holes of the connected parts, and the riveting equipment is used to apply radial pressure to the rivets to cause plastic deformation of the rivets. However, this method cannot determine the appropriate process parameters such as riveting speed and pressure, which leads to poor connection effect of radial riveting. Summary of the invention

[0004] The invention provides a radial riveting method and a device, the main purpose of which is to improve the connection effect of radial riveting.

[0005] To achieve the above object, the present invention provides a radial riveting method, comprising:

[0006] Acquire the rivet to be processed and its corresponding mounting component, collect material data corresponding to the mounting component, identify the mounting hole position in the mounting component, and measure the parameters corresponding to the mounting hole position and the rivet to obtain the hole position parameters and the rivet parameters, and calculate the fit coefficient between the rivet and the mounting hole position according to the hole position parameters and the rivet parameters;

[0007] Calculating the shear strength of the rivet in the installation component, and calculating the rivet impact force corresponding to the rivet according to the shear strength and the rivet parameters;

[0008] Combining the material data, the hole position parameters and the rivet parameters, respectively constructing simulation models corresponding to the rivet and the installation component to obtain a rivet simulation model and a component simulation model, performing simulation assembly processing on the rivet simulation model and the component simulation model according to the fit coefficient and the rivet impact force, and collecting component strain data and component yield force corresponding to the component simulation model and assembly result parameters corresponding to the rivet during the simulation assembly process;

[0009] Calculate the component strain amplitude corresponding to the component simulation model by combining the component strain data, the rivet impact force and the assembly result parameter, and calculate the component residual stress corresponding to the component simulation model according to the component yield force;

[0010] Combining the residual stress of the component and the strain amplitude of the component, the riveting process parameters corresponding to the rivet impact force are set, and according to the riveting process parameters, the rivet is used to perform riveting processing on the installation component to obtain a riveting result.

[0011] Optionally, calculating the fit coefficient between the rivet and the installation hole according to the hole position parameters and the rivet parameters includes:

[0012] Determine the hole diameter and hole depth corresponding to the installation hole according to the hole parameters;

[0013] Determine the rivet diameter and rivet length corresponding to the rivet according to the rivet parameters;

[0014] Calculate the diameter matching degree between the rivet and the installation hole by combining the hole diameter and the rivet diameter;

[0015] Calculate the depth matching between the rivet and the mounting hole based on the hole depth and the rivet diameter;

[0016] The fit coefficient between the rivet and the mounting hole is calculated in combination with the diameter matching degree and the depth matching degree.

[0017] Optionally, the calculating the fit coefficient between the rivet and the mounting hole by combining the diameter matching degree and the depth matching degree includes:

[0018] Obtaining historical installation data of the rivet;

[0019] According to the historical installation data, respectively evaluating the installation qualities corresponding to the diameter matching degree and the depth matching degree to obtain a first installation quality and a second installation quality;

[0020] Determine weight coefficients corresponding to the diameter matching degree and the depth matching degree according to the first installation quality and the second installation quality, and obtain a first weight coefficient and a second weight coefficient;

[0021] In combination with the diameter matching degree, the depth matching degree, the first weight coefficient and the second weight coefficient, the fit coefficient between the rivet and the mounting hole is calculated by the following formula:

[0022]

[0023] Among them, E represents the fit coefficient between the rivet and the mounting hole, α represents the first weight coefficient, A represents the diameter matching degree, and A max represents the maximum diameter matching degree, β represents the second weight coefficient, D represents the depth matching degree, and D max Indicates the maximum depth matching value.

[0024] Optionally, calculating the shear strength of the rivet in the installation component includes:

[0025] Query the working scene corresponding to the installation component;

[0026] Performing a load test on the working scene to obtain the load borne by the installation component;

[0027] According to the borne load, the shear force borne by the installation component is calculated, and the cross-sectional area corresponding to the rivet is measured;

[0028] The shear strength of the rivet in the installation component is calculated based on the shear force and the cross-sectional area.

[0029] Optionally, calculating the rivet impact force corresponding to the rivet according to the shear strength and the rivet parameters includes:

[0030] Determining a rivet diameter corresponding to the rivet according to the rivet parameters;

[0031] Obtaining a connection design strength corresponding to the installation component;

[0032] In combination with the rivet diameter, the connection design strength and the shear strength, the assembly depth corresponding to the rivet is calculated by the following formula:

[0033]

[0034] Among them, F represents the assembly depth corresponding to the rivet, γ represents the correction factor, δ represents the connection design strength, a represents the shear strength, and d represents the rivet diameter.

[0035] The rivet impact force corresponding to the rivet is calculated according to the assembly depth and the rivet diameter.

[0036] Optionally, calculating the rivet impact force corresponding to the rivet according to the assembly depth and the rivet diameter includes:

[0037] Querying the rivet strength factor corresponding to the rivet from a preset performance standard table;

[0038] Calculating the compression displacement corresponding to the rivet according to the assembly depth;

[0039] Combining the compression displacement, the rivet diameter and the rivet strength factor, the rivet impact force corresponding to the rivet is calculated by the following formula:

[0040]

[0041] Among them, G represents the rivet impact force corresponding to the rivet, h represents the compression displacement, d represents the rivet diameter, and b represents the rivet strength factor.

[0042] Optionally, the calculating the component strain amplitude corresponding to the component simulation model by combining the component strain data, the rivet impact force and the assembly result parameter includes:

[0043] Performing filtering processing on the component strain data to obtain filtered strain data;

[0044] Identifying component strain values ​​in the filtered strain data, and performing calibration processing on the component strain values ​​to obtain target strain values;

[0045] According to the target strain value, an average strain value of the component simulation model is calculated, and an assembly area corresponding to the rivet is extracted from the assembly result parameters;

[0046] The component strain amplitude corresponding to the component simulation model is calculated by combining the target strain value, the rivet impact force, the average strain value and the assembly area.

[0047] Optionally, the calculating the component strain amplitude corresponding to the component simulation model by combining the target strain value, the average strain value, the rivet impact force and the assembly area includes:

[0048] measuring an assembly angle between the component simulation model and the rivet simulation model;

[0049] calculating an assembly friction coefficient between the component simulation model and the rivet simulation model;

[0050] In combination with the assembly friction factor, the assembly angle, the rivet impact force, the assembly area, the target strain value and the average strain value, the component strain amplitude corresponding to the component simulation model is calculated by the following formula:

[0051]

[0052] Among them, H represents the component strain amplitude corresponding to the component simulation model, e i represents the i-th strain value in the target strain value, i represents the recording time corresponding to the target strain value, represents the average strain value, n represents the number of recording moments, g represents the rivet impact force, θ represents the assembly angle, S represents the assembly area, and ρ represents the assembly friction coefficient.

[0053] Optionally, calculating the component residual stress corresponding to the component simulation model according to the component yield force includes:

[0054] Measuring the thickness of the component corresponding to the component simulation model;

[0055] Performing a tensile test on the installation component to obtain tensile data;

[0056] Calculating the elastic modulus of the component corresponding to the installation component according to the stretching data;

[0057] Combining the elastic modulus of the component, the thickness of the component and the yield strength of the component, the residual stress of the component corresponding to the component simulation model is calculated by the following formula:

[0058]

[0059] Among them, L represents the residual stress of the component corresponding to the component simulation model, M represents the yield force of the component, h represents the thickness of the component, N represents the elastic modulus of the component, and ω represents the Poisson's ratio of the component.

[0060] A radial riveting device, characterized in that the device comprises:

[0061] A fit coefficient calculation module, used to obtain the rivet to be processed and its corresponding mounting component, collect material data corresponding to the mounting component, identify the mounting hole position in the mounting component, and measure the parameters corresponding to the mounting hole position and the rivet, obtain the hole position parameters and the rivet parameters, and calculate the fit coefficient between the rivet and the mounting hole position according to the hole position parameters and the rivet parameters;

[0062] A rivet impact force calculation module, used to calculate the shear strength of the rivet in the installation component, and calculate the rivet impact force corresponding to the rivet according to the shear strength and the rivet parameters;

[0063] A simulation assembly module, for respectively constructing simulation models corresponding to the rivet and the installation component in combination with the material data, the hole position parameters and the rivet parameters, to obtain a rivet simulation model and a component simulation model, and for performing simulation assembly processing on the rivet simulation model and the component simulation model according to the fit coefficient and the rivet impact force, and collecting component strain data and component yield force corresponding to the component simulation model and assembly result parameters corresponding to the rivet during the simulation assembly process;

[0064] A residual stress calculation module, used to calculate the component strain amplitude corresponding to the component simulation model by combining the component strain data, the rivet impact force and the assembly result parameter, and calculate the component residual stress corresponding to the component simulation model according to the component yield force;

[0065] The riveting processing module is used to set the riveting process parameters corresponding to the rivet impact force in combination with the residual stress of the component and the strain amplitude of the component, and perform the riveting processing of the rivet on the installation component according to the riveting process parameters to obtain the riveting result.

[0066] The present invention can obtain detailed information of the installation hole and the rivet by measuring the parameters corresponding to the installation hole and the rivet, calculate the fit coefficient between the rivet and the installation hole according to the hole parameters and the rivet parameters, and understand the degree of adaptability between the rivet and the installation hole through the fit index, so as to facilitate subsequent simulation assembly processing. The present invention calculates the shear strength of the rivet in the installation component, and can obtain the shear force bearing capacity of the rivet in the installation component, so as to provide a basis for the subsequent calculation of the impact force of the rivet. The present invention simulates and assembles the rivet simulation model and the component simulation model The present invention combines the component strain data, the rivet impact force and the assembly result parameters to calculate the component strain amplitude corresponding to the component simulation model, and can obtain the amplitude of the strain change corresponding to the component simulation model, which provides a basis for the setting of the subsequent riveting process parameters. The present invention combines the component residual stress and the component strain amplitude to set the riveting process parameters corresponding to the rivet impact force, which can achieve more optimized and reliable riveting connection parameters, thereby improving the subsequent riveting effect between the rivet and the installation component. Therefore, a radial riveting method and device provided by an embodiment of the present invention can improve the connection effect of radial riveting. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 A schematic diagram of a flow chart of a radial riveting method provided by an embodiment of the present invention;

[0068] Figure 2 A functional module diagram of a radial riveting device provided in one embodiment of the present invention.

[0069] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0070] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0071] The embodiment of the present application provides a radial riveting method. In the embodiment of the present application, the execution subject of the radial riveting method includes but is not limited to at least one of the electronic devices such as the server and the terminal that can be configured to execute the method provided by the embodiment of the present application. In other words, the radial riveting method can be executed by software or hardware installed on the terminal device or the server device, and the software can be a blockchain platform. The server includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, etc. The server can be an independent server, or it can be a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (Content Delivery Network, CDN), and big data and artificial intelligence platforms.

[0072] Reference Figure 1 FIG. 2 is a schematic flow chart of a radial riveting method provided by an embodiment of the present invention. In this embodiment, the radial riveting method includes steps S1 to S5.

[0073] S1. Obtain the rivet to be processed and its corresponding mounting component, collect material data corresponding to the mounting component, identify the mounting hole position in the mounting component, and measure the parameters corresponding to the mounting hole position and the rivet to obtain the hole position parameters and the rivet parameters, and calculate the fit coefficient between the rivet and the mounting hole position according to the hole position parameters and the rivet parameters.

[0074] The present invention can obtain detailed information of the mounting hole position and the rivet by measuring the parameters corresponding to the mounting hole position and the rivet, calculate the fit coefficient between the rivet and the mounting hole position according to the hole position parameters and the rivet parameters, and understand the degree of adaptability between the rivet and the mounting hole position through the fit index, thereby facilitating subsequent simulation assembly processing, wherein the rivet is a mechanical fastener used to connect two or more components, the mounting component is a machine that the rivet needs to be connected, the mounting hole position is the installation place of the mounting component with respect to the rivet, the hole position parameters and the rivet parameters are respectively the parameters corresponding to the mounting hole position and the rivet, such as the size parameters, and the fit index indicates the degree of adaptability between the rivet and the mounting hole position, and further, the material data corresponding to the mounting component can be obtained by collecting data provided by the material supplier; the identification of the mounting hole position in the mounting component can be achieved by laser scanning; the measurement of the parameters corresponding to the mounting hole position and the rivet can be achieved by a measuring tool, such as a laser rangefinder tool.

[0075] As an embodiment of the present invention, the calculation of the fit coefficient between the rivet and the installation hole according to the hole parameters and the rivet parameters includes: determining the hole diameter and the hole depth corresponding to the installation hole according to the hole parameters, determining the rivet diameter and the rivet length corresponding to the rivet according to the rivet parameters, calculating the diameter matching between the rivet and the installation hole in combination with the hole diameter and the rivet diameter, calculating the depth matching between the rivet and the installation hole in combination with the hole depth and the rivet diameter, and calculating the fit coefficient between the rivet and the installation hole in combination with the diameter matching and the depth matching.

[0076] The diameter matching degree indicates the matching degree between the rivet and the mounting hole in diameter, and the depth matching degree indicates the matching degree between the length of the rivet and the depth of the mounting hole. Optionally, the depth matching degree can be obtained by calculating the proportional coefficient between the rivet diameter and the hole depth.

[0077] Further, as an optional embodiment of the present invention, the combining the hole diameter and the rivet diameter to calculate the diameter matching degree between the rivet and the installation hole includes:

[0078] The diameter matching degree between the rivet and the mounting hole is calculated by the following formula:

[0079]

[0080] Among them, A represents the diameter matching degree between the rivet and the mounting hole, B holeIndicates the hole diameter, B rivet Indicates the rivet diameter.

[0081] Further, as an optional embodiment of the present invention, the combining of the diameter matching and the depth matching to calculate the fit coefficient between the rivet and the mounting hole comprises: acquiring historical installation data of the rivet, and evaluating the installation qualities corresponding to the diameter matching and the depth matching respectively according to the historical installation data to obtain a first installation quality and a second installation quality, and determining weight coefficients corresponding to the diameter matching and the depth matching according to the first installation quality and the second installation quality to obtain a first weight coefficient and a second weight coefficient, and combining the diameter matching, the depth matching, the first weight coefficient and the second weight coefficient to calculate the fit coefficient between the rivet and the mounting hole by the following formula:

[0082]

[0083] Among them, E represents the fit coefficient between the rivet and the mounting hole, α represents the first weight coefficient, A represents the diameter matching degree, and A max represents the maximum diameter matching degree, β represents the second weight coefficient, D represents the depth matching degree, and D max Indicates the maximum depth matching value.

[0084] Among them, the first installation quality and the second installation quality are the installation qualities corresponding to the different diameter matching degrees and the depth matching degrees, respectively, the first weight coefficient and the second weight coefficient respectively represent the influence of the diameter matching degree and the depth matching degree on the installation quality, the maximum diameter matching degree and the maximum depth matching degree are respectively the theoretical maximum values ​​of the diameter matching degree and the depth matching degree, and the maximum diameter matching degree and the maximum depth matching degree are both 1.

[0085] Furthermore, the historical installation data of the rivet can be obtained through an industry database, which is a repository for recording installation-related data of the rivet; the installation data corresponding to the diameter matching and the depth matching are extracted from the historical installation data, and at the same time, the corresponding installation quality evaluation index data, such as connection strength, sealing, durability, etc., are obtained, an evaluation index system is established, and specific quantitative indicators are determined to measure the installation quality, such as stipulating that the strength reaches a certain value, so as to obtain the installation quality corresponding to the diameter matching and the depth matching; the quality difference between the first installation qualities and the quality difference between the second installation qualities are respectively calculated, the quality differences are summed to obtain the total quality difference, the ratio of the quality difference corresponding to the first installation quality to the total quality difference is calculated to obtain the first weight coefficient, and the ratio of the quality difference corresponding to the second installation quality to the total quality difference is calculated to obtain the second weight coefficient.

[0086] S2. Calculate the shear strength of the rivet in the installation component, and calculate the rivet impact force corresponding to the rivet according to the shear strength and the rivet parameters.

[0087] The present invention calculates the shear strength of the rivet in the installation component, and can obtain the ability of the rivet to withstand shear force in the installation component, thereby providing a basis for the subsequent calculation of the impact force of the rivet, wherein the shear strength represents a quantitative value of the ability of the rivet to withstand relative movement or dislocation in the installation component.

[0088] As an embodiment of the present invention, calculating the shear strength of the rivet in the installation component includes: querying the working scene corresponding to the installation component, performing a load test on the working scene to obtain the load borne by the installation component, calculating the shear force borne by the installation component based on the load borne, and measuring the cross-sectional area corresponding to the rivet, and calculating the shear strength of the rivet in the installation component in combination with the shear force borne and the cross-sectional area.

[0089] Among them, the working scene is the working environment corresponding to the installation component, the borne load is the comprehensive effect of various forces and moments borne by the installation component in the application scenario, and the borne shear force is the force of the relative movement of the installation component caused by the borne load.

[0090] Optionally, the load test of the working scenario can be carried out through a physical model test to make a physical model of the component; the load test is carried out in a laboratory to simulate the working scenario to obtain the load borne by the installation component; the force and direction generated by the load are calculated, and the shear force borne by the installation component is calculated based on the force and the corresponding direction; the cross-sectional area corresponding to the rivet can be measured by direct measurement, such as using a caliper; the ratio of the shear force to the cross-sectional area is calculated to obtain the shear strength of the rivet in the installation component.

[0091] The present invention calculates the rivet impact force corresponding to the rivet according to the shear strength and the rivet parameters, and can determine the external force required to be applied when the rivet is installed through the rivet impact force, so as to facilitate subsequent simulation assembly processing, wherein the rivet impact force is the force required to be applied when the rivet is installed.

[0092] As an embodiment of the present invention, the rivet impact force corresponding to the rivet is calculated according to the shear strength and the rivet parameters, including: determining the rivet diameter corresponding to the rivet according to the rivet parameters, obtaining the connection design strength corresponding to the installation component, and combining the rivet diameter, the connection design strength and the shear strength to calculate the assembly depth corresponding to the rivet by the following formula:

[0093]

[0094] Among them, F represents the assembly depth corresponding to the rivet, γ represents the correction factor, δ represents the connection design strength, a represents the shear strength, and d represents the rivet diameter.

[0095] The rivet impact force corresponding to the rivet is calculated according to the assembly depth and the rivet diameter.

[0096] Among them, the rivet diameter is the diameter size of the circular part of the rivet cross section, the connection design strength is the ability standard set by the installation component to withstand the expected load, and the assembly depth is the corresponding embedding depth when the rivet is installed. Furthermore, the connection design strength corresponding to the installation component can be obtained by referring to relevant industry standards, national standards or international standards.

[0097] Further, as an optional embodiment of the present invention, the calculating the rivet impact force corresponding to the rivet according to the assembly depth and the rivet diameter includes: querying the rivet strength factor corresponding to the rivet from a preset performance standard table, calculating the compression displacement corresponding to the rivet according to the assembly depth, and combining the compression displacement, the rivet diameter and the rivet strength factor to calculate the rivet impact force corresponding to the rivet by the following formula:

[0098]

[0099] Among them, G represents the rivet impact force corresponding to the rivet, h represents the compression displacement, d represents the rivet diameter, and b represents the rivet strength factor.

[0100] Among them, the preset performance standard table is a table constructed by pre-collecting a large number of strength coefficients of rivets, such as the national standard "GB / T3098.1-2010 Mechanical properties of fasteners bolts, screws and studs", the rivet strength factor represents the strength value corresponding to the rivet, the compression displacement is the change in length of the rivet during the assembly process, and further, the compression displacement can be obtained by subtracting the assembly depth from the length of the rivet.

[0101] S3. Combining the material data, the hole position parameters and the rivet parameters, respectively construct simulation models corresponding to the rivet and the installation component to obtain a rivet simulation model and a component simulation model; performing simulation assembly processing on the rivet simulation model and the component simulation model according to the fit coefficient and the rivet impact force; and collecting component strain data and component yield force corresponding to the component simulation model and assembly result parameters corresponding to the rivet during the simulation assembly process.

[0102] The present invention performs simulated assembly processing on the rivet simulation model and the component simulation model to facilitate the collection of relevant data during the simulated assembly process, thereby providing a basis for the subsequent calculation of the strain amplitude of the component, wherein the rivet simulation model and the component simulation model are virtual models corresponding to the rivet and the installation component, respectively, the component strain data is the record data of the specific numerical value of the deformation of the simulation model during the simulated assembly process, the component yield force is the corresponding force value when the component simulation model is deformed, and the assembly result parameter is the parameter information of the installation hole after simulated assembly. Furthermore, the construction of the simulation model corresponding to the rivet and the installation component can be achieved by simulation software, such as CAD tools; the simulated assembly processing of the rivet simulation model and the component simulation model can be achieved by finite element analysis software, such as ANSYS software; the collection of the component strain data corresponding to the component simulation model and the assembly result parameters corresponding to the rivet during the simulated assembly process can be achieved by a data acquisition tool, and the data acquisition tool is compiled by JAVA language.

[0103] S4. Calculate the component strain amplitude corresponding to the component simulation model by combining the component strain data, the rivet impact force and the assembly result parameter, and calculate the component residual stress corresponding to the component simulation model according to the component yield force.

[0104] The present invention calculates the component strain amplitude corresponding to the component simulation model by combining the component strain data, the rivet impact force and the assembly result parameters, and can obtain the amplitude of the strain change corresponding to the component simulation model, thereby providing a basis for setting subsequent riveting process parameters, wherein the component strain amplitude represents the amplitude of the strain change of the component simulation model.

[0105] As an embodiment of the present invention, the component strain amplitude corresponding to the component simulation model is calculated by combining the component strain data, the rivet impact force and the assembly result parameters, including: filtering the component strain data to obtain filtered strain data, identifying the component strain value in the filtered strain data, calibrating the component strain value to obtain a target strain value, calculating the average strain value of the component simulation model according to the target strain value, extracting the assembly area corresponding to the rivet from the assembly result parameters, and calculating the component strain amplitude corresponding to the component simulation model by combining the target strain value, the rivet impact force, the average strain value and the assembly area.

[0106] Among them, the filtered strain data is the data obtained after removing the noise interference in the component strain data, the component strain value is the detailed strain value recorded in the filtered strain data about the component simulation model, the target strain value is the strain value obtained after correcting the abnormal value in the component strain value, and the assembly area is the actual contact area of ​​the rivet during the assembly process.

[0107] Optionally, the filtering processing of the component strain data can be achieved by a low-pass filter; the calibration processing of the component strain value can be achieved by a hardware calibration method, using a standard specimen with known material properties and strain values, installing the measuring equipment on the standard specimen, applying a known load or deformation, comparing the measured strain value with the theoretical strain value of the standard specimen, and calibrating and correcting the measuring equipment.

[0108] Optionally, as an optional embodiment of the present invention, the combining of the target strain value, the average strain value, the rivet impact force and the assembly area to calculate the component strain amplitude corresponding to the component simulation model includes: measuring the assembly angle between the component simulation model and the rivet simulation model, and calculating the assembly friction coefficient between the component simulation model and the rivet simulation model, combining the assembly friction coefficient, the assembly angle, the rivet impact force, the assembly area, the target strain value and the average strain value, and calculating the component strain amplitude corresponding to the component simulation model by the following formula:

[0109]

[0110] Among them, H represents the component strain amplitude corresponding to the component simulation model, e i represents the i-th strain value in the target strain value, i represents the recording time corresponding to the target strain value, represents the average strain value, n represents the number of recording moments, g represents the rivet impact force, θ represents the assembly angle, S represents the assembly area, and ρ represents the assembly friction coefficient.

[0111] Among them, the assembly angle is the assembly angle between the rivet simulation model when it is installed in the component simulation model, and the assembly friction coefficient represents the degree to which the contact surface between the component simulation model and the rivet simulation model hinders relative movement. Optionally, the measurement of the assembly angle between the component simulation model and the rivet simulation model can be achieved by a total station; the calculation of the assembly friction coefficient between the component simulation model and the rivet simulation model can be achieved by an energy balance method, analyzing the energy input and output during the assembly process, and calculating the friction coefficient based on the relationship between energy loss and work done by friction.

[0112] The present invention calculates the component residual stress corresponding to the component simulation model based on the component yield force, and the component residual stress can be used to understand the stress existing inside the component simulation model when no external force is loaded, thereby improving the accuracy of setting subsequent riveting process parameters, wherein the component residual stress is the stress existing inside the component simulation model, which may be tensile stress or compressive stress.

[0113] As an embodiment of the present invention, the component residual stress corresponding to the component simulation model is calculated according to the component yield force, including: measuring the component thickness corresponding to the component simulation model, performing a tensile test on the installation component to obtain tensile data, calculating the component elastic modulus corresponding to the installation component according to the tensile data, and combining the component elastic modulus, the component thickness and the component yield force to calculate the component residual stress corresponding to the component simulation model by the following formula:

[0114]

[0115] Among them, L represents the residual stress of the component corresponding to the component simulation model, M represents the yield force of the component, h represents the thickness of the component, N represents the elastic modulus of the component, and ω represents the Poisson's ratio of the component.

[0116] Among them, the stretching data is a series of information recorded after the installation component is stretched by a stretching device, the component elastic modulus and the component Poisson's ratio are respectively the ability of the installation component to resist elastic deformation and lateral shrinkage. Optionally, the measurement of the component thickness corresponding to the component simulation model can be achieved by an ultrasonic thickness gauge; the tensile test of the installation component can be achieved by a universal material testing machine; the stress-strain curve of the installation component is constructed according to the stretching data, and the slope of the stress-strain curve is calculated to obtain the component elastic modulus; the component Poisson's ratio can be obtained through material parameters provided by the manufacturer of the installation component.

[0117] S5. Combining the residual stress of the component and the strain amplitude of the component, setting the riveting process parameters corresponding to the rivet impact force, and performing the riveting process of the rivet on the installation component according to the riveting process parameters to obtain the riveting result.

[0118] The present invention sets the riveting process parameters corresponding to the rivet impact force in combination with the residual stress of the component and the strain amplitude of the component, so as to achieve more optimized and more reliable riveting connection parameters, thereby improving the subsequent riveting effect between the rivet and the installation component, wherein the riveting process parameters are the execution parameters of the rivet impact force, such as action time, action frequency and loading mode, etc. Further, the riveting process parameters of the rivet impact force are set in combination with the values ​​of the residual stress of the component and the strain amplitude of the component. If the residual stress of the component is too large, the loading rate of the rivet impact force can be reduced, such as from the original 1000 Newtons per second to 500 Newtons per second. If the strain amplitude of the component is too large, the action time of the rivet impact force can be reduced, such as from the original 5 seconds to 2 seconds. The specific process parameters can be set according to the actual application scenario; the riveting treatment of the installation component by the rivet can be achieved by riveting equipment.

[0119] The present invention can obtain detailed information of the installation hole and the rivet by measuring the parameters corresponding to the installation hole and the rivet, calculate the fit coefficient between the rivet and the installation hole according to the hole parameters and the rivet parameters, and understand the degree of adaptability between the rivet and the installation hole through the fit index, so as to facilitate subsequent simulation assembly processing. The present invention calculates the shear strength of the rivet in the installation component, and can obtain the shear force bearing capacity of the rivet in the installation component, so as to provide a basis for the subsequent calculation of the impact force of the rivet. The present invention simulates and assembles the rivet simulation model and the component simulation model The present invention combines the component strain data, the rivet impact force and the assembly result parameters to calculate the component strain amplitude corresponding to the component simulation model, and can obtain the amplitude of the strain change corresponding to the component simulation model, which provides a basis for the setting of subsequent riveting process parameters. The present invention combines the component residual stress and the component strain amplitude to set the riveting process parameters corresponding to the rivet impact force, which can achieve more optimized and reliable riveting connection parameters, thereby improving the subsequent riveting effect between the rivet and the installation component. Therefore, a radial riveting method provided by an embodiment of the present invention can improve the connection effect of radial riveting.

[0120] like Figure 2 , which is a functional module diagram of a radial riveting device provided by one embodiment of the present invention.

[0121] The radial riveting device 100 of the present invention can be installed in an electronic device. According to the functions to be implemented, the radial riveting device 100 can include a fit coefficient calculation module 101, a rivet impact force calculation module 102, a simulation assembly module 103, a residual stress calculation module 104 and a riveting processing module 105. The module of the present invention can also be called a unit, which refers to a series of computer program segments that can be executed by an electronic device processor and can complete fixed functions, which are stored in the memory of the electronic device.

[0122] In this embodiment, the functions of each module / unit are as follows:

[0123] The fit coefficient calculation module 101 is used to obtain the rivet to be processed and its corresponding mounting component, collect material data corresponding to the mounting component, identify the mounting hole position in the mounting component, and measure the parameters corresponding to the mounting hole position and the rivet to obtain the hole position parameters and the rivet parameters, and calculate the fit coefficient between the rivet and the mounting hole position according to the hole position parameters and the rivet parameters;

[0124] The rivet impact force calculation module 102 is used to calculate the shear strength of the rivet in the installation component, and calculate the rivet impact force corresponding to the rivet according to the shear strength and the rivet parameters;

[0125] The simulation assembly module 103 is used to construct simulation models corresponding to the rivet and the installation component respectively in combination with the material data, the hole position parameters and the rivet parameters, obtain a rivet simulation model and a component simulation model, perform simulation assembly processing on the rivet simulation model and the component simulation model according to the fit coefficient and the rivet impact force, and collect component strain data and component yield force corresponding to the component simulation model and assembly result parameters corresponding to the rivet during the simulation assembly process;

[0126] The residual stress calculation module 104 is used to calculate the component strain amplitude corresponding to the component simulation model by combining the component strain data, the rivet impact force and the assembly result parameter, and calculate the component residual stress corresponding to the component simulation model according to the component yield force;

[0127] The riveting processing module 105 is used to set the riveting process parameters corresponding to the rivet impact force in combination with the residual stress of the component and the strain amplitude of the component, and perform the riveting process of the rivet on the installation component according to the riveting process parameters to obtain the riveting result.

[0128] In detail, each module described in the radial riveting device 100 described in the embodiment of the present application is used in the same manner as described above. Figure 1 The radial riveting method described in the invention has the same technical means and can produce the same technical effect, so it will not be repeated here.

[0129] In the several embodiments provided by the present invention, it should be understood that the provided methods and devices can be implemented in other ways. For example, the method embodiments described above are only illustrative, for example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A radial riveting method, characterized in that: The method comprises: Acquire the rivet to be processed and its corresponding mounting component, collect material data corresponding to the mounting component, identify the mounting hole position in the mounting component, and measure the parameters corresponding to the mounting hole position and the rivet to obtain the hole position parameters and the rivet parameters, and calculate the fit coefficient between the rivet and the mounting hole position according to the hole position parameters and the rivet parameters; Calculating the shear strength of the rivet in the installation component, and calculating the rivet impact force corresponding to the rivet according to the shear strength and the rivet parameters; Combining the material data, the hole position parameters and the rivet parameters, respectively constructing simulation models corresponding to the rivet and the installation component to obtain a rivet simulation model and a component simulation model, performing simulation assembly processing on the rivet simulation model and the component simulation model according to the fit coefficient and the rivet impact force, and collecting component strain data and component yield force corresponding to the component simulation model and assembly result parameters corresponding to the rivet during the simulation assembly process; Calculate the component strain amplitude corresponding to the component simulation model by combining the component strain data, the rivet impact force and the assembly result parameter, and calculate the component residual stress corresponding to the component simulation model according to the component yield force; Combining the residual stress of the component and the strain amplitude of the component, the riveting process parameters corresponding to the rivet impact force are set, and according to the riveting process parameters, the rivet is used to perform riveting processing on the installation component to obtain a riveting result.

2. A radial riveting method according to claim 1, characterized in that: The calculating the fit coefficient between the rivet and the installation hole according to the hole position parameters and the rivet parameters includes: Determine the hole diameter and hole depth corresponding to the installation hole according to the hole parameters; Determine the rivet diameter and rivet length corresponding to the rivet according to the rivet parameters; Calculate the diameter matching degree between the rivet and the installation hole by combining the hole diameter and the rivet diameter; Calculate the depth matching between the rivet and the mounting hole based on the hole depth and the rivet diameter; The fit coefficient between the rivet and the mounting hole is calculated in combination with the diameter matching degree and the depth matching degree.

3. A radial riveting method as claimed in claim 2, characterized in that: The calculating the fit coefficient between the rivet and the mounting hole by combining the diameter matching degree and the depth matching degree includes: Obtaining historical installation data of the rivet; According to the historical installation data, respectively evaluating the installation qualities corresponding to the diameter matching degree and the depth matching degree to obtain a first installation quality and a second installation quality; Determine weight coefficients corresponding to the diameter matching degree and the depth matching degree according to the first installation quality and the second installation quality, and obtain a first weight coefficient and a second weight coefficient; In combination with the diameter matching degree, the depth matching degree, the first weight coefficient and the second weight coefficient, the fit coefficient between the rivet and the mounting hole is calculated by the following formula: Among them, E represents the fit coefficient between the rivet and the mounting hole, α represents the first weight coefficient, A represents the diameter matching degree, and A max represents the maximum diameter matching degree, β represents the second weight coefficient, D represents the depth matching degree, and D max Indicates the maximum depth matching value.

4. A radial riveting method as claimed in claim 1, characterized in that: The calculating the shear strength of the rivet in the installation component comprises: Query the working scene corresponding to the installation component; Performing a load test on the working scene to obtain the load borne by the installation component; According to the borne load, the shear force borne by the installation component is calculated, and the cross-sectional area corresponding to the rivet is measured; The shear strength of the rivet in the installation component is calculated based on the shear force and the cross-sectional area.

5. A radial riveting method according to claim 1, characterized in that: The calculating, according to the shear strength and the rivet parameters, the rivet impact force corresponding to the rivet comprises: Determining a rivet diameter corresponding to the rivet according to the rivet parameters; Obtaining a connection design strength corresponding to the installation component; In combination with the rivet diameter, the connection design strength and the shear strength, the assembly depth corresponding to the rivet is calculated by the following formula: Among them, F represents the assembly depth corresponding to the rivet, γ represents the correction factor, δ represents the connection design strength, a represents the shear strength, and d represents the rivet diameter. The rivet impact force corresponding to the rivet is calculated according to the assembly depth and the rivet diameter.

6. A radial riveting method as claimed in claim 5, characterized in that: The calculating, according to the assembly depth and the rivet diameter, the rivet impact force corresponding to the rivet comprises: Querying the rivet strength factor corresponding to the rivet from a preset performance standard table; Calculating the compression displacement corresponding to the rivet according to the assembly depth; Combining the compression displacement, the rivet diameter and the rivet strength factor, the rivet impact force corresponding to the rivet is calculated by the following formula: Among them, G represents the rivet impact force corresponding to the rivet, h represents the compression displacement, d represents the rivet diameter, and b represents the rivet strength factor.

7. A radial riveting method as claimed in claim 1, characterized in that: The calculating the component strain amplitude corresponding to the component simulation model by combining the component strain data, the rivet impact force and the assembly result parameter includes: Performing filtering processing on the component strain data to obtain filtered strain data; Identifying component strain values ​​in the filtered strain data, and performing calibration processing on the component strain values ​​to obtain target strain values; According to the target strain value, an average strain value of the component simulation model is calculated, and an assembly area corresponding to the rivet is extracted from the assembly result parameters; The component strain amplitude corresponding to the component simulation model is calculated by combining the target strain value, the rivet impact force, the average strain value and the assembly area.

8. A radial riveting method as claimed in claim 6, characterized in that: The calculating the component strain amplitude corresponding to the component simulation model by combining the target strain value, the average strain value, the rivet impact force and the assembly area includes: measuring an assembly angle between the component simulation model and the rivet simulation model; calculating an assembly friction coefficient between the component simulation model and the rivet simulation model; In combination with the assembly friction factor, the assembly angle, the rivet impact force, the assembly area, the target strain value and the average strain value, the component strain amplitude corresponding to the component simulation model is calculated by the following formula: Among them, H represents the component strain amplitude corresponding to the component simulation model, e i represents the i-th strain value in the target strain value, i represents the recording time corresponding to the target strain value, represents the average strain value, n represents the number of recording moments, g represents the rivet impact force, θ represents the assembly angle, S represents the assembly area, and ρ represents the assembly friction coefficient.

9. A radial riveting method as claimed in claim 1, characterized in that: The calculating, according to the yield force of the component, the residual stress of the component corresponding to the simulation model of the component includes: Measuring the thickness of the component corresponding to the component simulation model; Performing a tensile test on the installation component to obtain tensile data; Calculating the elastic modulus of the component corresponding to the installation component according to the stretching data; Combining the elastic modulus of the component, the thickness of the component and the yield strength of the component, the residual stress of the component corresponding to the component simulation model is calculated by the following formula: Among them, L represents the residual stress of the component corresponding to the component simulation model, M represents the yield force of the component, h represents the thickness of the component, N represents the elastic modulus of the component, and ω represents the Poisson's ratio of the component.

10. A radial riveting device, characterized in that: The device comprises: A fit coefficient calculation module, used to obtain the rivet to be processed and its corresponding mounting component, collect material data corresponding to the mounting component, identify the mounting hole position in the mounting component, and measure the parameters corresponding to the mounting hole position and the rivet, obtain the hole position parameters and the rivet parameters, and calculate the fit coefficient between the rivet and the mounting hole position according to the hole position parameters and the rivet parameters; A rivet impact force calculation module, used to calculate the shear strength of the rivet in the installation component, and calculate the rivet impact force corresponding to the rivet according to the shear strength and the rivet parameters; A simulation assembly module, for respectively constructing simulation models corresponding to the rivet and the installation component in combination with the material data, the hole position parameters and the rivet parameters, to obtain a rivet simulation model and a component simulation model, and for performing simulation assembly processing on the rivet simulation model and the component simulation model according to the fit coefficient and the rivet impact force, and collecting component strain data and component yield force corresponding to the component simulation model and assembly result parameters corresponding to the rivet during the simulation assembly process; A residual stress calculation module, used to calculate the component strain amplitude corresponding to the component simulation model by combining the component strain data, the rivet impact force and the assembly result parameter, and calculate the component residual stress corresponding to the component simulation model according to the component yield force; The riveting processing module is used to set the riveting process parameters corresponding to the rivet impact force in combination with the residual stress of the component and the strain amplitude of the component, and perform the riveting processing of the rivet on the installation component according to the riveting process parameters to obtain the riveting result.

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