Riveting assembly obtaining method and device, computer equipment, readable storage medium and program product

Abstract

The invention relates to a riveting assembly obtaining method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the steps of firstly obtaining riveting quality requirements and initial riveting process parameters of riveting points in a riveting assembly based on a product pattern, and then sequentially obtaining target riveting process parameters, a first width and a second width based on the riveting quality requirements, the initial riveting process parameters and different types of riveting assemblies, and finally, based on the second width and the preset riveting die radius, the target self-piercing riveting edge landing amount is determined, and based on the target self-piercing riveting edge landing amount, a lower-layer die casting of the target riveting assembly is obtained. According to the method provided by the invention, the connection between the lower-layer die casting and the upper-layer stamping part is more stable and reliable.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle body die casting design, and in particular to a riveted component acquisition method, device, computer equipment, computer-readable storage medium and computer program product. Background Art

[0002] As the lightweight development of the whole vehicle enters the deep water zone, the application of integrated body die-casting parts made of aluminum-magnesium alloy with more integrated, lightweight and high-performance advantages in body design has gradually increased, and its integrated size has become larger and larger. Correspondingly, the connection between it and the surrounding stamping parts will be inevitable. The existing technology is to use traditional welding technology to connect the body die-casting parts and the surrounding stamping parts. However, it is difficult to achieve high reliability and high stability connection of die-cast aluminum-magnesium alloy with traditional welding technology. Summary of the invention

[0003] Based on this, it is necessary to provide a riveted component acquisition method, device, computer equipment, computer-readable storage medium and computer program product that can improve the connection reliability and stability between the car body die-casting and the surrounding stamping parts in order to solve the above technical problems.

[0004] In a first aspect, the present application provides a method for obtaining a riveted component, the method comprising:

[0005] Obtain a product drawing of a target riveted assembly, and obtain riveting quality requirements and initial riveting process parameters of riveted points in the riveted assembly based on the product drawing, wherein the types of the riveted assembly include a flat riveted assembly, a flat riveted assembly with a gradient width, and a circular flat riveted assembly with a stepped variable diameter, and the riveted assembly is composed of an upper stamping part and a lower die casting;

[0006] For a flat riveting assembly designed based on the initial riveting process parameters, when the riveting quality of the riveted points in the flat riveting assembly meets the riveting quality requirements, determining the initial riveting process parameters as target riveting process parameters;

[0007] For a gradient-width flat-plate riveting assembly designed based on the target riveting process parameters, the gradient-width flat-plate riveting assembly is riveted, and when cracks begin to appear at a riveting point, a distance between the riveting point where the cracks appear and a preset point in a lower die casting of the gradient-width flat-plate riveting assembly is determined as a first width;

[0008] For a stepped-diameter circular flat plate riveting assembly designed based on the target riveting process parameters and the first width, the stepped-diameter circular flat plate riveting assembly is riveted, and in the case that there is a lower layer die casting without cracks, the radius of the lower layer die casting without cracks is determined as a second width, wherein the stepped-diameter circular flat plate riveting assembly includes a plurality of circular lower layer die castings with different radii;

[0009] Based on the second width and a preset riveting die radius, a target self-piercing riveting overlap amount is determined, and a lower die casting of the target riveted assembly is obtained based on the target self-piercing riveting overlap amount.

[0010] In one embodiment, the gradient width flat plate riveting assembly includes an upper stamping part and a lower die-casting part, the plane of the upper stamping part facing the lower die-casting part is a rectangle, and the plane of the lower die-casting part facing the upper stamping part is an isosceles triangle, the height on the base of the isosceles triangle and the midline of the rectangle along the long side are in the same plane, the same plane is perpendicular to the plane where the rectangle is located, and the same plane is perpendicular to the plane where the isosceles triangle is located, the riveting points are arranged along the height on the base of the isosceles triangle, and the distance between every two riveting points is a preset distance.

[0011] In one embodiment, the step of riveting the flat plate riveting assembly with a gradually variable width, when cracks begin to appear at a riveting point, determining the distance between the riveting point where the cracks appear and a preset point in the lower die casting of the flat plate riveting assembly with a gradually variable width as a first width, comprises:

[0012] Riveting each riveting point in sequence along a riveting direction, wherein the riveting direction is from the midpoint of the base of the isosceles triangle to the vertex of the isosceles triangle;

[0013] In the case that a crack appears at the current riveting point, the riveting process is stopped, and the distance between the current riveting point and the midpoint of the preset isosceles side of the isosceles triangle is determined as the initial width;

[0014] Returning to the step of riveting each riveting point in sequence along the riveting direction and continuing to perform the step until a first preset number of initial widths are obtained;

[0015] The maximum width among the initial widths is determined as the first width.

[0016] In one embodiment, the diameter of the smallest lower die casting of the stepped variable diameter circular flat plate riveting assembly is a second preset number of times the first width, and the diameters of the remaining lower die castings are increased sequentially according to preset sizes based on the diameter of the smallest lower die casting, and the centers of the lower die castings are arranged in order from small to large on the same straight line, and each lower die casting corresponds to a riveting point.

[0017] In one embodiment, the step of riveting the stepped variable diameter circular flat plate riveting assembly, in the case where the lower die casting has no cracks, determining the radius of the lower die casting without cracks as the second width, comprises:

[0018] Riveting the lower die castings in order from the smallest diameter to the largest diameter of the lower die castings;

[0019] In the case that no cracks occur in the current lower die casting, the riveting process is stopped, and the radius of the current lower die casting is determined as the second width.

[0020] In one of the embodiments, the riveting quality requirements include that the left self-locking value, the right self-locking value, the head height and the bottom remaining thickness of the riveting point are all within the corresponding preset ranges, and there are no abnormal riveting connections.

[0021] In a second aspect, the present application further provides a riveted assembly acquisition device, the device comprising:

[0022] An acquisition module is used to acquire a product drawing of a target riveted assembly, and acquire riveting quality requirements and initial riveting process parameters of riveted points in the riveted assembly based on the product drawing, wherein the types of the riveted assembly include a flat riveted assembly, a flat riveted assembly with a gradient width, and a circular flat riveted assembly with a stepped variable diameter, and the riveted assembly is composed of an upper stamping part and a lower die casting;

[0023] A first determination module is used for determining, for a flat riveting assembly designed based on the initial riveting process parameters, the initial riveting process parameters as target riveting process parameters when the riveting quality of the riveted points in the flat riveting assembly meets the riveting quality requirements;

[0024] a first riveting module, for riveting a gradient-width flat-plate riveting assembly designed based on the target riveting process parameters, and in the case where cracks begin to appear at a riveting point, determining a distance between the riveting point where the cracks appear and a preset point in a lower die casting of the gradient-width flat-plate riveting assembly as a first width;

[0025] a second riveting module, for riveting a stepped-diameter circular flat plate riveting assembly designed based on the target riveting process parameters and the first width, and in the case that there is a lower layer die casting without cracks, determining the radius of the lower layer die casting without cracks as a second width, wherein the stepped-diameter circular flat plate riveting assembly includes a plurality of circular lower layer die castings with different radii;

[0026] The second determination module is used to determine a target self-piercing riveting overlap amount based on the second width and a preset riveting die radius, and obtain a lower die casting of the target riveted assembly based on the target self-piercing riveting overlap amount.

[0027] In a third aspect, the present application further provides a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method in any one of the above embodiments when executing the computer program.

[0028] In a fourth aspect, the present application further provides a computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method in any one of the above embodiments are implemented.

[0029] In a fifth aspect, the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the method in any one of the above embodiments are implemented.

[0030] The above-mentioned riveted component acquisition method, device, computer equipment, computer-readable storage medium and computer program product acquire the riveting quality requirements and initial riveting process parameters of the riveted points in the riveted component based on the product drawing; for the flat riveted component designed based on the initial riveting process parameters, when the riveting quality of the riveted points in the flat riveted component meets the riveting quality requirements, the initial riveting process parameters are determined as the target riveting process parameters; for the gradient width flat riveted component designed based on the target riveting process parameters, the gradient width flat riveted component is riveted, and when cracks begin to appear at the riveted points, the gradient width flat riveted component is riveted. In the case of cracks, the distance between the rivet point where the cracks appear and the preset point in the lower die casting of the gradient width flat plate riveting assembly is determined as the first width; for the stepped variable diameter circular flat plate riveting assembly designed based on the target riveting process parameters and the first width, the stepped variable diameter circular flat plate riveting assembly is riveted, and in the case that there is no crack in the lower die casting, the radius of the lower die casting without cracks is determined as the second width; based on the second width and the preset riveting die radius, the target self-piercing riveting overlap amount is determined, and the lower die casting of the target riveting assembly is obtained based on the target self-piercing riveting overlap amount. The method provided in the present application determines the target self-piercing riveting overlap amount based on the riveting quality requirements and the initial riveting process parameters, and obtains the lower die casting based on the target self-piercing riveting overlap amount, so that the connection between the lower die casting and the upper stamping part obtained is more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of a flow chart of a method for obtaining a riveted component in one embodiment;

[0033] Figure 2 A schematic diagram of a local connection structure of an overlapping area of ​​a riveted assembly in one embodiment;

[0034] Figure 3 A schematic cross-sectional view of a self-piercing riveting point formed by a riveting assembly in one embodiment;

[0035] Figure 4 It is a structural schematic diagram of a flat plate riveting assembly in one embodiment;

[0036] Figure 5 It is a schematic structural diagram of a flat plate riveting assembly with a gradual width in one embodiment;

[0037] Figure 6 is a schematic flow chart of a first width determination method in one embodiment;

[0038] Figure 7 It is a schematic structural diagram of a circular flat plate riveting assembly with stepped variable diameter in one embodiment;

[0039] Figure 8 A structural block diagram of a riveting assembly obtaining device in one embodiment;

[0040] Fig. 9 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] In one embodiment, Figure 1 As shown, a method for obtaining a riveted component is provided. This embodiment takes the method applied to a terminal as an example. It can be understood that the method can also be applied to a server, and can also be applied to a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. In this embodiment, the method includes the following steps:

[0043] S102, obtaining a product drawing of a target riveted component, and obtaining riveting quality requirements and initial riveting process parameters of riveted points in the riveted component based on the product drawing, wherein the types of riveted components include flat riveted components, flat riveted components with gradually variable widths, and circular flat riveted components with stepped variable diameters, and the riveted components are composed of an upper stamping part and a lower die-casting part.

[0044] Among them, the riveting point is the connection point formed after the upper stamping part and the lower die-casting part are connected through the self-piercing riveting process; the riveting process parameters include the parameters of the connected substrate, the rivet parameters, the rivet die parameters, the structural adhesive parameters, the riveting process direction, the riveting pressure-time control curve, and the dynamic quality monitoring process, wherein the connected substrate parameters include the material thickness, material category and surface coating information of the upper stamping part, and the material thickness, material category and heat treatment status of the riveted connection edge of the lower die-casting, the rivet parameters include the rivet model, rivet hardness and surface coating status, the rivet die includes the upper rivet die and the lower rivet die, the rivet die parameters include the rivet model number, the rivet die size and the cavity shape of the lower rivet die, the structural adhesive parameters include the model and technical parameters of the structural adhesive used at the connection interface between the upper stamping part and the lower die-casting, and the riveting process direction is from top to bottom, that is, the rivet is connected from the upper stamping part to the lower die-casting; the lower die-castings of the three types of riveted components are all prepared by the same die-casting process as the actual body die-castings.

[0045] Figure 2 The figure is a schematic diagram of the local connection structure of the overlap area of ​​the riveted assembly. In the figure, 1 is a stamping part, 2 is a die-casting part made of aluminum-magnesium alloy material, 3 is a riveting point, and H4 is the riveting overlap amount. The riveting overlap amount refers to the overlap amount of two adjacent plate parts at the overlap during the riveting process, so as to fix them together with rivets. This overlap amount is to ensure that the riveted structure has sufficient connection strength and sealing; Figure 3 It is a schematic cross-sectional diagram of the self-piercing riveting point formed by the riveted assembly, in which t1 is the thickness of the upper stamping part, t2 is the thickness of the lower die-casting part, a is the head height of the riveted point, b is the bottom remaining thickness of the riveted point, c1 is the left self-locking value of the riveted point, and c2 is the right self-locking value of the riveted point.

[0046] S104: for the flat riveted assembly designed based on the initial riveting process parameters, when the riveting quality of the riveted points in the flat riveted assembly meets the riveting quality requirements, the initial riveting process parameters are determined as target riveting process parameters.

[0047] in, Figure 4 It is a structural schematic diagram of a flat riveting assembly, in which 11 is an upper stamping part, 12 is a lower die-casting part, 13 is a riveting point, L1 is the length of the upper stamping part and the lower die-casting part, W1 is the width of the upper stamping part and the lower die-casting part, wherein 40mm≤W1≤60mm, 100mm≤L1≤200mm.

[0048] S106. For a gradient-width flat-plate riveting assembly designed based on target riveting process parameters, the gradient-width flat-plate riveting assembly is riveted. When cracks begin to appear at a riveting point, a distance between the riveting point where the cracks appear and a preset point in a lower die-casting of the gradient-width flat-plate riveting assembly is determined as a first width.

[0049] Wherein, a riveting sequence for riveting the riveting points can be preset based on the distribution of the riveting points, and the gradient width flat plate riveting assembly can be riveted based on the preset riveting sequence.

[0050] S108. For a stepped variable diameter circular flat plate riveting assembly designed based on target riveting process parameters and a first width, the stepped variable diameter circular flat plate riveting assembly is riveted, and in the case that a lower layer die casting has no cracks, the radius of the lower layer die casting without cracks is determined as the second width, and the stepped variable diameter circular flat plate riveting assembly includes a plurality of circular lower layer die castings with different radii.

[0051] The diameter of the lower die casting is based on the distribution of the lower die casting and increases in sequence according to a preset size. For example, the preset size may be 1 mm.

[0052] S110, determining a target self-piercing riveting overlap amount based on the second width and a preset riveting die radius, and obtaining a lower die casting of a target riveted assembly based on the target self-piercing riveting overlap amount.

[0053] Among them, self-piercing riveting is a special riveting method that does not require pre-punching. Instead, it uses a special riveting tool to punch the rivet directly into the riveted part under pressure to form a connection at the same time.

[0054] The relationship between the target self-piercing riveting overlap amount, the second width and the preset riveting die radius is shown in the following formula:

[0055] H3=H2+R1

[0056] Wherein, H3 is the target self-piercing riveting overlap, H2 is the second width, and R1 is the preset riveting die radius.

[0057] In order to ensure the consistency and stability of the connection quality and to reserve a certain quality assurance tolerance a for production, during product design, the critical value H4 needs to meet the following requirement: H4 = H3 + a.

[0058] In the above-mentioned riveted component acquisition method, the riveting quality requirements and initial riveting process parameters of the riveted points in the riveted component are obtained based on the product drawing; for the flat riveted component designed based on the initial riveting process parameters, when the riveting quality of the riveted points in the flat riveted component meets the riveting quality requirements, the initial riveting process parameters are determined as the target riveting process parameters; for the gradient width flat riveted component designed based on the target riveting process parameters, the gradient width flat riveted component is riveted, and when cracks begin to appear at the riveted points, the rivets with cracks are repaired. The distance between the contact point and the preset point in the lower die casting of the gradient width flat plate riveting assembly is determined as the first width; for the stepped variable diameter circular flat plate riveting assembly designed based on the target riveting process parameters and the first width, the stepped variable diameter circular flat plate riveting assembly is riveted, and in the case that there is no crack in the lower die casting, the radius of the lower die casting without cracks is determined as the second width; based on the second width and the preset riveting die radius, the target self-piercing riveting overlap amount is determined, and the lower die casting of the target riveting assembly is obtained based on the target self-piercing riveting overlap amount. The method provided in the present application determines the target self-piercing riveting overlap amount based on the riveting quality requirements and the initial riveting process parameters, and obtains the lower die casting based on the target self-piercing riveting overlap amount, so that the connection between the lower die casting and the upper stamping part obtained is more stable and reliable.

[0059] In some embodiments, the gradient width flat plate riveting assembly includes an upper stamping part and a lower die-casting part, the plane in the upper stamping part facing the lower die-casting is a rectangle, and the plane in the lower die-casting facing the upper stamping part is an isosceles triangle, the height on the base of the isosceles triangle and the midline along the long side of the rectangle are in the same plane, the same plane is perpendicular to the plane where the rectangle is located, and the same plane is perpendicular to the plane where the isosceles triangle is located, the rivet points are arranged along the height on the base of the isosceles triangle, and the distance between every two rivet points is a preset distance.

[0060] in, Figure 5 Schematic diagram of the structure of the flat riveting assembly with a gradient width. In the figure, 21 is the upper stamping, 22 is the lower die-casting, 23 is the riveting point, L2 is the length of the upper stamping, W2 is the width of the upper stamping, L3 is the length of the lower die-casting, W3 is the width of the lower die-casting, M is the distance between the two riveting points, that is, the preset distance, S is the distance from the riveting point to the midpoint of an isosceles side of the isosceles triangle when the first riveting crack appears, and S1 is the first riveting point. The distance between the midpoint of the bottom edge of the lower die casting, where the lower die casting is at the central position of the upper stamping, 60mm≤W3≤100mm, 500mm≤L3≤800mm, the vertex angle of the isosceles triangle satisfies 4°≤α≤10°, W2 and W3 satisfy W3+20mm≤W2≤W3+80mm, L2 and L3 satisfy L3+20mm≤L2≤L3+50mm, 20mm≤M≤35mm.

[0061] In some embodiments, Figure 6 As shown, the gradient width flat plate riveting assembly is riveted, and when cracks begin to appear at the riveting point, the distance between the riveting point where the cracks appear and a preset point in the lower die casting of the gradient width flat plate riveting assembly is determined as the first width, including:

[0062] S602, riveting each riveting point in turn along the riveting direction, wherein the riveting direction is from the midpoint of the base of the isosceles triangle to the vertex of the isosceles triangle.

[0063] S604: When a crack appears at the current riveting point, the riveting process is stopped, and the distance between the current riveting point and the midpoint of the preset isosceles side of the isosceles triangle is determined as the initial width.

[0064] S606, returning to the step of riveting each riveting point in sequence along the riveting direction and continuing to execute until a first preset number of initial widths are obtained.

[0065] S608: Determine the maximum width among the initial widths as the first width.

[0066] The current riveting point where cracks appear is the first riveting point where cracks appear.

[0067] In this embodiment, the initial widths are obtained multiple times, and finally the largest initial width is determined as the first width. Thus, the first width determined in this way is more accurate.

[0068] In some embodiments, the diameter of the smallest lower die casting of the stepped variable diameter circular flat plate riveting assembly is a second preset number of times the first width, and the diameters of the remaining lower die castings are increased sequentially according to preset sizes based on the diameter of the smallest lower die casting, and the centers of the lower die castings are arranged in order from small to large on the same straight line, and each lower die casting corresponds to a riveting point.

[0069] in, Figure 7 Schematic diagram of the structure of a stepped variable diameter circular flat plate riveting assembly, in which 31 is an upper stamping part, 32 is a lower die-casting part, 33 is a riveting point, L4 is the length of the upper stamping part, and W4 is the width of the stepped variable diameter circular flat plate riveting assembly.

[0070] In some embodiments, a stepped variable diameter circular flat plate riveting assembly is riveted, and in the case that there is a lower die casting without cracks, the radius of the lower die casting without cracks is determined as the second width, including: riveting the lower die castings in order of their diameters from small to large; in the case that no cracks are currently present in the lower die casting, stopping the riveting process and determining the radius of the current lower die casting as the second width.

[0071] The current lower die-casting without cracks is the first lower die-casting without cracks.

[0072] In this embodiment, riveting is performed in order of diameters of the lower die castings from small to large, and finally the radius of the lower die casting where cracks first appear is determined as the second width, so that the second width determined in this way is more accurate.

[0073] In some embodiments, the riveting quality requirements include that the left self-locking value, the right self-locking value, the head height and the bottom remaining thickness of the riveting point are all within the corresponding preset ranges, and there are no abnormal riveting connections.

[0074] Among them, abnormal conditions of riveted connections include riveting cracks, rivet penetration, rivet breakage, etc.

[0075] In one embodiment, another method for obtaining a riveted component is provided, the method comprising the following contents:

[0076] The overlap amount of self-piercing riveting between the die-casting of cast aluminum shock absorber tower and the surrounding steel plate stamping parts of a certain vehicle body was determined. The cast aluminum shock absorber tower was made of AlSi10MnMg-T7 with an overlap thickness of 2.5 mm. The surrounding steel plate stamping parts were made of 1.0 mm thick St280D+Z. 1840C structural adhesive was used between the connecting surfaces of the two parts to prevent electrochemical corrosion.

[0077] Step 1: Obtain the actual riveting point connection quality requirements and the parameters of the connected substrate, rivet and riveting die

[0078] The actual riveting point (3) is a connection point formed by connecting the cast aluminum shock tower die-casting (2) of the vehicle body and the surrounding steel plate stamping part (1) through a self-piercing riveting process.

[0079] The connection quality requirements of the actual riveting points are obtained based on the actual product drawings, among which four indicators, including the left self-locking value c1, the right self-locking value c2, the head height a, and the bottom remaining thickness b, meet the design requirements, and there are no quality defects such as riveting extension cracks, rivet piercing, and rivet breakage.

[0080] Based on the actual product drawings, the parameters of the connected substrates at the actual riveted points are obtained, including the material thickness, category and surface coating information of the upper stamping part, the material thickness, category and heat treatment status of the riveted connection edge of the lower cast aluminum part, the model, hardness and surface coating status of the rivet, the model, size and shape of the lower rivet model cavity of the rivet die, and the model and technical parameters of the structural adhesive used at the connection interface between the upper stamping part and the lower cast aluminum part.

[0081] Step 2: Prepare the riveting test sample

[0082] The riveting test samples include three types of test samples: flat plate riveting test samples, gradient width flat plate riveting test samples, and stepped diameter circular flat plate riveting test samples.

[0083] All three types of samples are composed of an upper plate and a lower plate. The material thickness, category, and surface coating information of the upper plate are the same as those of the upper stamping parts of the actual product. The material thickness, category, and heat treatment status of the lower plate are the same as the connecting edge of the lower die-casting of the actual product.

[0084] The width dimension of the upper plate (11) and the lower plate (12) of the flat riveting test sample is both W1, and the value range of W1 satisfies: W1=45mm; the length dimension is both L1, and the value range of L1 satisfies: L1=150mm.

[0085] The gradient width flat plate riveting test sample consists of an upper plate (21) and a lower plate (22). The shape of the upper plate (21) is a rectangle, and the shape of the lower plate (22) is an isosceles triangle. The bottom width of the lower plate (22) is W3, and the value range of W3 satisfies: W3 = 80 mm, the range of the height L3 satisfies: L3 = 700 mm, and the degree of the vertex angle (24) of the lower plate (22) satisfies = 6°. The width of the upper plate (21) is W2 = 110 mm, and the length of the upper plate (21) is L2 = 740 mm.

[0086] The length L4 and width W4 of the lower plate (23) of the stepped diameter circular flat plate riveting test sample are respectively the same as the length L2 and width W2 of the lower plate (22) of the gradually varying width flat plate riveting test sample.

[0087] Step 3: Obtain qualified riveting process parameters based on flat riveting samples

[0088] Qualified riveting process parameters are the process parameters used to ensure that the riveting quality of the flat riveted samples meets the actual riveting point connection quality requirements, including rivet model and requirements, rivet model number and requirements, riveting process direction, riveting pressure-time control curve and dynamic quality monitoring process.

[0089] The rivet quality under qualified riveting process parameters is determined by cutting the center of the rivet point and visually determining the metallographic structure. Based on the metallographic structure of the rivet point, it is determined that the three indicators of self-locking value, head height and bottom remaining thickness meet the design requirements. Based on visual inspection, it is determined that there are no quality defects such as rivet point extension cracks, rivet piercing, and rivet breakage.

[0090] The riveting process direction is from top to bottom, that is, the rivets are connected from the upper plate (11) to the lower plate (12).

[0091] The model, hardness and surface coating state of the rivets used in the process of obtaining riveting process parameters are the same as those of the rivets used at the actual riveting points, the model, size and bottom mold cavity shape of the rivet mold used are the same as those of the actual riveting points, and the structure used between the upper plate (11) and the lower plate (12) of the flat riveted sample (1) is 1840C.

[0092] Step 4: Obtain the initial upper limit of the width of the crack extending from the rivet point based on the flat plate riveting test sample with a gradient width

[0093] The qualified riveting process parameters obtained in step 3 are used to obtain the upper limit of the initial width of the rivet point extension crack based on the gradient width flat plate riveting test sample (2).

[0094] In the riveting test in step four, the lower plate (22) of the gradient width flat plate riveting test sample (2) is placed in the center of the upper plate (21), and a structural adhesive with the same model and technical parameters as the actual riveting points is provided between the lower plate (22) and the upper plate (21). The riveting points are arranged along the center line of the lower plate (22), and the distance M between every two riveting points satisfies: M = 30 mm. The distance S1 = 25 mm between the first riveting point (23) and the bottom edge of the lower plate (22). Riveting is performed from the bottom edge of the lower plate (22) along the center line to the top angle, and the process stops when the first riveting extension crack appears at the riveting point (23). A micrometer is used to measure the distance S from the center of the riveting point to an isosceles side of the lower plate (22). The above process is repeated 4 times again to obtain S1, S2, S3, and S4, and the maximum value S of the above 5 sets of data is taken. max The upper limit value of the initial width for the occurrence of rivet point extension cracks is H1=9.60mm.

[0095] Step 5: Based on the step-variable diameter circular plate riveting test sample, obtain the lower limit of the width of the riveting point without the occurrence of extended cracks

[0096] With 2 times S max The initial minimum diameter D0 of the lower plate (32) in the step-variable diameter circular flat plate riveting test sample is 19.20 mm, and the subsequent diameter is processed with a minimum increment of 1 mm to prepare a batch of step-variable diameter lower plates (32). The qualified riveting process parameters obtained in step 3 are used to obtain the final width lower limit value at which no extended cracks appear at the riveting point based on the step-variable diameter circular flat plate riveting test sample.

[0097] In the riveting test in step 5, the lower plate (32) of the stepped variable diameter circular flat plate riveting test sample is placed in the center of the upper plate (31), and a structural adhesive with the same model and technical parameters as the actual riveting point is set between the lower plate (32) and the upper plate (31), and the riveting points are also arranged along the center line of the lower plate (32). Riveting is performed in the direction from the diameter of the lower plate (32) to the diameter of the lower plate (32) from small to large until no riveting extension cracks appear. The radius R = 11.10 mm corresponding to the first lower plate (32) that does not have a riveting extension crack is the lower limit value of the width of the riveting point without an extension crack H2 = R = 11.10 mm.

[0098] Step 6: Calculate the required overlap value of the self-piercing rivet of the die-casting body based on the lower limit of the width without the occurrence of extended cracks

[0099] The theoretical requirement value H3 of the overlap of the self-piercing riveting of the body die casting, the lower limit value H2 of the width without extended cracks at the rivet point, and the radius R1 of the rivet die (R1 = 11mm) satisfy the relationship: H3 = H2 + R1 = 22.10mm. In order to ensure the consistency and stability of the connection quality, and to consider retaining a certain quality assurance tolerance a = 3mm for production, in product design, the critical value H4 needs to meet the following requirements: H4 = H3 + a = 25.10mm.

[0100] In summary: Through experiments, it was determined that the self-piercing riveting overlap value H4=25.10mm between the cast aluminum shock absorber tower die-casting and the surrounding steel plate stamping parts of the vehicle body.

[0101] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0102] Based on the same inventive concept, the embodiment of the present application also provides a riveted component acquisition device for implementing the riveted component acquisition method involved above. The implementation solution provided by the device to solve the problem is similar to the implementation solution recorded in the above method, so the specific limitations in one or more riveted component acquisition device embodiments provided below can refer to the limitations of the riveted component acquisition method above, and will not be repeated here.

[0103] In an exemplary embodiment, Figure 8 As shown, a riveting assembly acquisition device 800 is provided, comprising: an acquisition module 801, a first determination module 802, a first riveting module 803, a second riveting module 804 and a second determination module 805, wherein:

[0104] The acquisition module 801 is used to obtain a product drawing of a target riveted component, and obtain riveting quality requirements and initial riveting process parameters of riveted points in the riveted component based on the product drawing. The types of the riveted components include flat riveted components, gradient width flat riveted components, and stepped variable diameter circular flat riveted components. The riveted components are composed of an upper stamping part and a lower die casting.

[0105] The first determination module 802 is used to determine the initial riveting process parameters as target riveting process parameters for a flat riveted assembly designed based on the initial riveting process parameters, when the riveting quality of the riveted points in the flat riveted assembly meets the riveting quality requirements.

[0106] The first riveting module 803 is used to rivet the gradient width flat plate riveting assembly designed based on the target riveting process parameters, and when cracks begin to appear at the riveting point, determine the distance between the riveting point where the cracks appear and a preset point in the lower die casting of the gradient width flat plate riveting assembly as the first width.

[0107] The second riveting module 804 is used to rivet the stepped-diameter circular flat plate riveting assembly designed based on the target riveting process parameters and the first width, and in the case that there is a lower layer die casting without cracks, the radius of the lower layer die casting without cracks is determined as the second width, and the stepped-diameter circular flat plate riveting assembly includes multiple circular lower layer die castings with different radii.

[0108] The second determination module 805 is used to determine a target self-piercing riveting overlap amount based on the second width and a preset riveting die radius, and obtain a lower die casting of the target riveted assembly based on the target self-piercing riveting overlap amount.

[0109] In some embodiments, a riveting assembly acquisition device 800 is specifically used for a gradient width flat plate riveting assembly including an upper stamping part and a lower die-casting part, wherein the plane in the upper stamping part facing the lower die-casting part is a rectangle, and the plane in the lower die-casting part facing the upper stamping part is an isosceles triangle, the height on the base of the isosceles triangle and the midline of the rectangle along the long side are in the same plane, the same plane is perpendicular to the plane where the rectangle is located, and the same plane is perpendicular to the plane where the isosceles triangle is located, the riveting points are arranged along the height on the base of the isosceles triangle, and the distance between every two riveting points is a preset distance.

[0110] In some embodiments, the first riveting module 803 is also used to rivet each riveting point in sequence along the riveting direction, and the riveting direction is from the midpoint of the base of the isosceles triangle to the vertex of the isosceles triangle; when a crack appears at the current riveting point, the riveting process is stopped, and the distance between the current riveting point and the midpoint of the preset isosceles side of the isosceles triangle is determined as the initial width; return to the step of riveting each riveting point in sequence along the riveting direction and continue to execute until a first preset number of initial widths are obtained; and the maximum width among the initial widths is determined as the first width.

[0111] In some embodiments, the riveting assembly acquisition device 800 is also used for a stepped variable diameter circular flat plate riveting assembly, wherein the diameter of the smallest lower die casting is a second preset number of times the first width, and the diameters of the remaining lower die castings are increased sequentially according to preset sizes based on the diameter of the smallest lower die casting, and the centers of the lower die castings are arranged sequentially on the same straight line in ascending order, and each lower die casting corresponds to a riveting point.

[0112] In some embodiments, the second riveting module 804 is also used to rivet the lower die-castings in order from small to large diameters; when no cracks appear in the current lower die-casting, the riveting process is stopped and the radius of the current lower die-casting is determined as the second width.

[0113] In some embodiments, the riveting assembly acquisition device 800 is also used to ensure that the riveting quality requirements include that the left self-locking value, the right self-locking value, the head height and the bottom remaining thickness of the riveting point are all within the corresponding preset range, and there is no abnormal riveting connection.

[0114] Each module in the above-mentioned riveting component acquisition device can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0115] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Fig. 9 As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface, the display unit and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (Near Field Communication, NFC) or other technologies. When the computer program is executed by the processor, a method for obtaining a riveted component is implemented.

[0116] Those skilled in the art will understand that Fig. 9 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0117] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the following steps when executing the computer program: obtaining a product drawing of a target riveted component, and obtaining riveting quality requirements and initial riveting process parameters of riveted points in the riveted component based on the product drawing, wherein the types of the riveted components include flat riveted components, gradient width flat riveted components, and stepped variable diameter circular flat riveted components, and the riveted components are composed of an upper stamping part and a lower die casting; for a flat riveted component designed based on the initial riveting process parameters, when the riveting quality of the riveted points in the flat riveted component meets the riveting quality requirements, determining the initial riveting process parameters as target riveting process parameters; for a gradient width designed based on the target riveting process parameters, determining the initial riveting process parameters as target riveting process parameters. A flat plate riveting assembly, wherein the gradient width flat plate riveting assembly is riveted, and in the case that cracks begin to appear at the riveting point, the distance between the riveting point where the cracks appear and a preset point in the lower die casting of the gradient width flat plate riveting assembly is determined as a first width; for a stepped diameter circular flat plate riveting assembly designed based on the target riveting process parameters and the first width, the stepped diameter circular flat plate riveting assembly is riveted, and in the case that cracks do not appear in the lower die casting, the radius of the lower die casting without cracks is determined as a second width, and the stepped diameter circular flat plate riveting assembly includes a plurality of circular lower die castings with different radii; based on the second width and a preset riveting die radius, a target self-piercing riveting overlap amount is determined, and the lower die casting of the target riveting assembly is obtained based on the target self-piercing riveting overlap amount.

[0118] In one embodiment, the gradient width flat plate riveting assembly implemented when the processor executes the computer program includes an upper stamping part and a lower die-casting part, the plane of the upper stamping part facing the lower die-casting part is a rectangle, and the plane of the lower die-casting part facing the upper stamping part is an isosceles triangle, the height on the base of the isosceles triangle and the midline of the rectangle along the long side are in the same plane, the same plane is perpendicular to the plane where the rectangle is located, and the same plane is perpendicular to the plane where the isosceles triangle is located, the riveting points are arranged along the height on the base of the isosceles triangle, and the distance between every two riveting points is a preset distance.

[0119] In one embodiment, the riveting of the gradient width flat plate riveting assembly implemented by the processor executing the computer program, in the case that cracks begin to appear at the riveting point, the distance between the riveting point where the cracks appear and a preset point in the lower die casting of the gradient width flat plate riveting assembly is determined as the first width, including: riveting each riveting point in turn along the riveting direction, the riveting direction is from the midpoint on the base of the isosceles triangle to the vertex of the isosceles triangle; when cracks appear at the current riveting point, stopping the riveting process, and determining the distance between the current riveting point and the midpoint of the preset isosceles side of the isosceles triangle as the initial width; returning to the step of riveting each riveting point in turn along the riveting direction and continuing to execute until a first preset number of initial widths are obtained; and determining the maximum width among the initial widths as the first width.

[0120] In one embodiment, the diameter of the smallest lower die casting of the stepped variable diameter circular flat plate riveting assembly implemented when the processor executes the computer program is a second preset number of times the first width, and the diameters of the remaining lower die castings are increased sequentially according to the preset size based on the diameter of the smallest lower die casting, and the centers of the lower die castings are arranged in order from small to large on the same straight line, and each lower die casting corresponds to a riveting point.

[0121] In one embodiment, the processor executes a computer program to implement riveting of the stepped variable diameter circular flat plate riveting assembly, and in the case that there is no crack in the lower die casting, the radius of the lower die casting without crack is determined as the second width, including: riveting the lower die castings in order of their diameters from small to large; in the case that no cracks appear in the current lower die casting, stopping the riveting process and determining the radius of the current lower die casting as the second width.

[0122] In one embodiment, the riveting quality requirements implemented when the processor executes the computer program include that the left self-locking value, the right self-locking value, the head height and the bottom remaining thickness of the riveting point are all within the corresponding preset ranges, and there is no abnormal riveting connection.

[0123] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented: obtaining a product drawing of a target riveted component, and obtaining riveting quality requirements and initial riveting process parameters of riveted points in the riveted component based on the product drawing, wherein the types of the riveted components include flat riveted components, gradient-width flat riveted components, and stepped-diameter circular flat riveted components, and the riveted components are composed of an upper stamping part and a lower die-casting part; for a flat riveted component designed based on the initial riveting process parameters, when the riveting quality of the riveted points in the flat riveted component meets the riveting quality requirements, determining the initial riveting process parameters as target riveting process parameters; for a gradient-width flat riveted component designed based on the target riveting process parameters, , the gradient width flat plate riveting assembly is riveted, and in the case that cracks begin to appear at the riveting point, the distance between the riveting point where the cracks appear and a preset point in the lower die casting of the gradient width flat plate riveting assembly is determined as a first width; for the stepped diameter circular flat plate riveting assembly designed based on the target riveting process parameters and the first width, the stepped diameter circular flat plate riveting assembly is riveted, and in the case that no cracks appear in the lower die casting, the radius of the lower die casting without cracks is determined as a second width, and the stepped diameter circular flat plate riveting assembly includes a plurality of circular lower die castings with different radii; based on the second width and the preset riveting die radius, a target self-piercing riveting overlap amount is determined, and the lower die casting of the target riveting assembly is obtained based on the target self-piercing riveting overlap amount.

[0124] In one embodiment, a gradient width flat plate riveting assembly implemented when a computer program is executed by a processor includes an upper stamping part and a lower die-casting part, wherein the plane in the upper stamping part facing the lower die-casting part is a rectangle, and the plane in the lower die-casting part facing the upper stamping part is an isosceles triangle, the height on the base of the isosceles triangle and the midline along the long side of the rectangle are in the same plane, the same plane is perpendicular to the plane where the rectangle is located, and the same plane is perpendicular to the plane where the isosceles triangle is located, the riveting points are arranged along the height on the base of the isosceles triangle, and the distance between every two riveting points is a preset distance.

[0125] In one embodiment, the computer program implemented by the processor when being executed is riveting the gradient width flat plate riveting assembly, and in the case that cracks begin to appear at the riveting point, the distance between the riveting point where the cracks appear and a preset point in the lower die casting of the gradient width flat plate riveting assembly is determined as the first width, including: riveting each riveting point in turn along the riveting direction, and the riveting direction is from the midpoint on the base of the isosceles triangle to the vertex of the isosceles triangle; when cracks appear at the current riveting point, stopping the riveting process, and determining the distance between the current riveting point and the midpoint of the preset isosceles side of the isosceles triangle as the initial width; returning to the step of riveting each riveting point in turn along the riveting direction and continuing to execute until a first preset number of initial widths are obtained; and determining the maximum width among the initial widths as the first width.

[0126] In one embodiment, the diameter of the smallest lower die casting of the stepped variable diameter circular flat plate riveting assembly implemented when the computer program is executed by the processor is a second preset number of times the first width, and the diameters of the remaining lower die castings are increased sequentially according to the preset size based on the diameter of the smallest lower die casting, and the centers of the lower die castings are arranged in order from small to large on the same straight line, and each lower die casting corresponds to a riveting point.

[0127] In one embodiment, the computer program implemented when executed by the processor is riveting the stepped variable diameter circular flat plate riveting assembly, and in the case that there is no crack in the lower die casting, the radius of the lower die casting without crack is determined as the second width, including: riveting the lower die castings in order of their diameters from small to large; in the case that no cracks appear in the current lower die casting, stopping the riveting process and determining the radius of the current lower die casting as the second width.

[0128] In one embodiment, the riveting quality requirements implemented when the computer program is executed by the processor include that the left self-locking value, the right self-locking value, the head height and the bottom remaining thickness of the riveting point are all within the corresponding preset ranges, and there is no abnormal riveting connection.

[0129] In one embodiment, a computer program product is provided, including a computer program, which implements the following steps when executed by a processor: obtaining a product drawing of a target riveted component, obtaining riveting quality requirements and initial riveting process parameters of riveted points in the riveted component based on the product drawing, wherein the types of the riveted components include flat riveted components, gradient-width flat riveted components, and stepped-diameter circular flat riveted components, and the riveted components are composed of an upper stamping part and a lower die-casting part; for a flat riveted component designed based on the initial riveting process parameters, when the riveting quality of the riveted points in the flat riveted component meets the riveting quality requirements, determining the initial riveting process parameters as target riveting process parameters; for a gradient-width flat riveted component designed based on the target riveting process parameters, The gradient width flat plate riveting assembly is riveted, and in the case that cracks begin to appear at the riveting point, the distance between the riveting point where the cracks appear and a preset point in the lower die casting of the gradient width flat plate riveting assembly is determined as a first width; for a stepped diameter circular flat plate riveting assembly designed based on the target riveting process parameters and the first width, the stepped diameter circular flat plate riveting assembly is riveted, and in the case that cracks do not appear in the lower die casting, the radius of the lower die casting without cracks is determined as a second width, and the stepped diameter circular flat plate riveting assembly includes a plurality of circular lower die castings with different radii; based on the second width and a preset riveting die radius, a target self-piercing riveting overlap amount is determined, and the lower die casting of the target riveting assembly is obtained based on the target self-piercing riveting overlap amount.

[0130] In one embodiment, a gradient width flat plate riveting assembly implemented when a computer program is executed by a processor includes an upper stamping part and a lower die-casting part, wherein the plane in the upper stamping part facing the lower die-casting part is a rectangle, and the plane in the lower die-casting part facing the upper stamping part is an isosceles triangle, the height on the base of the isosceles triangle and the midline along the long side of the rectangle are in the same plane, the same plane is perpendicular to the plane where the rectangle is located, and the same plane is perpendicular to the plane where the isosceles triangle is located, the riveting points are arranged along the height on the base of the isosceles triangle, and the distance between every two riveting points is a preset distance.

[0131] In one embodiment, the computer program implemented by the processor when being executed is riveting the gradient width flat plate riveting assembly, and in the case that cracks begin to appear at the riveting point, the distance between the riveting point where the cracks appear and a preset point in the lower die casting of the gradient width flat plate riveting assembly is determined as the first width, including: riveting each riveting point in turn along the riveting direction, and the riveting direction is from the midpoint on the base of the isosceles triangle to the vertex of the isosceles triangle; when cracks appear at the current riveting point, stopping the riveting process, and determining the distance between the current riveting point and the midpoint of the preset isosceles side of the isosceles triangle as the initial width; returning to the step of riveting each riveting point in turn along the riveting direction and continuing to execute until a first preset number of initial widths are obtained; and determining the maximum width among the initial widths as the first width.

[0132] In one embodiment, the diameter of the smallest lower die casting of the stepped variable diameter circular flat plate riveting assembly implemented when the computer program is executed by the processor is a second preset number of times the first width, and the diameters of the remaining lower die castings are increased sequentially according to the preset size based on the diameter of the smallest lower die casting, and the centers of the lower die castings are arranged in order from small to large on the same straight line, and each lower die casting corresponds to a riveting point.

[0133] In one embodiment, the computer program implemented when executed by the processor is riveting the stepped variable diameter circular flat plate riveting assembly, and in the case that there is no crack in the lower die casting, the radius of the lower die casting without crack is determined as the second width, including: riveting the lower die castings in order of their diameters from small to large; in the case that no cracks appear in the current lower die casting, stopping the riveting process and determining the radius of the current lower die casting as the second width.

[0134] In one embodiment, the riveting quality requirements implemented when the computer program is executed by the processor include that the left self-locking value, the right self-locking value, the head height and the bottom remaining thickness of the riveting point are all within the corresponding preset ranges, and there is no abnormal riveting connection.

[0135] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0136] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0137] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0138] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for obtaining a riveted component, characterized in that: The method comprises: Obtain a product drawing of a target riveted assembly, and obtain riveting quality requirements and initial riveting process parameters of riveted points in the riveted assembly based on the product drawing, wherein the types of the riveted assembly include a flat riveted assembly, a flat riveted assembly with a gradient width, and a circular flat riveted assembly with a stepped variable diameter, and the riveted assembly is composed of an upper stamping part and a lower die casting; For a flat riveting assembly designed based on the initial riveting process parameters, when the riveting quality of the riveted points in the flat riveting assembly meets the riveting quality requirements, determining the initial riveting process parameters as target riveting process parameters; For a gradient-width flat-plate riveting assembly designed based on the target riveting process parameters, the gradient-width flat-plate riveting assembly is riveted, and when cracks begin to appear at a riveting point, a distance between the riveting point where the cracks appear and a preset point in a lower die casting of the gradient-width flat-plate riveting assembly is determined as a first width; For a stepped-diameter circular flat plate riveting assembly designed based on the target riveting process parameters and the first width, the stepped-diameter circular flat plate riveting assembly is riveted, and in the case that there is a lower layer die casting without cracks, the radius of the lower layer die casting without cracks is determined as a second width, wherein the stepped-diameter circular flat plate riveting assembly includes a plurality of circular lower layer die castings with different radii; Based on the second width and a preset riveting die radius, a target self-piercing riveting overlap amount is determined, and a lower die casting of the target riveted assembly is obtained based on the target self-piercing riveting overlap amount.

2. The method according to claim 1, characterized in that The gradient width flat plate riveting assembly includes an upper stamping part and a lower die-casting part. The plane in the upper stamping part facing the lower die-casting part is a rectangle, and the plane in the lower die-casting part facing the upper stamping part is an isosceles triangle. The height on the base of the isosceles triangle and the midline along the long side of the rectangle are in the same plane, and the same plane is perpendicular to the plane where the rectangle is located, and the same plane is perpendicular to the plane where the isosceles triangle is located. The riveting points are arranged along the height on the base of the isosceles triangle, and the distance between every two riveting points is a preset distance.

3. The method according to claim 2, characterized in that The step of riveting the flat plate riveting assembly with a gradually variable width, and determining the distance between the riveting point where the crack begins to appear and a preset point in the lower die casting of the flat plate riveting assembly with a gradually variable width as a first width, comprises: Riveting each riveting point in sequence along a riveting direction, wherein the riveting direction is from the midpoint of the base of the isosceles triangle to the vertex of the isosceles triangle; In the case that a crack appears at the current riveting point, the riveting process is stopped, and the distance between the current riveting point and the midpoint of the preset isosceles side of the isosceles triangle is determined as the initial width; Returning to the step of riveting each riveting point in sequence along the riveting direction and continuing to perform the step until a first preset number of initial widths are obtained; The maximum width among the initial widths is determined as the first width.

4. The method according to claim 1, characterized in that The diameter of the smallest lower die casting of the stepped variable diameter circular flat plate riveting assembly is a second preset number of times the first width, and the diameters of the remaining lower die castings increase sequentially according to the preset dimensions based on the diameter of the smallest lower die casting. The centers of the lower die castings are arranged sequentially on the same straight line in ascending order, and each lower die casting corresponds to a riveting point.

5. The method according to claim 4, characterized in that The step of riveting the stepped variable diameter circular flat plate riveting assembly, in the case where the lower die casting has no cracks, determining the radius of the lower die casting without cracks as the second width, comprises: Riveting the lower die castings in order from the smallest diameter to the largest diameter of the lower die castings; In the case that no cracks occur in the current lower die casting, the riveting process is stopped, and the radius of the current lower die casting is determined as the second width.

6. The method according to claim 1, characterized in that The riveting quality requirements include that the left self-locking value, the right self-locking value, the head height and the bottom remaining thickness of the riveting point are all within the corresponding preset ranges, and there are no abnormal riveting connections.

7. A riveting assembly acquisition device, characterized in that: The device comprises: An acquisition module is used to acquire a product drawing of a target riveted assembly, and acquire riveting quality requirements and initial riveting process parameters of riveted points in the riveted assembly based on the product drawing, wherein the types of the riveted assembly include a flat riveted assembly, a flat riveted assembly with a gradient width, and a circular flat riveted assembly with a stepped variable diameter, and the riveted assembly is composed of an upper stamping part and a lower die casting; A first determination module is used for determining, for a flat riveting assembly designed based on the initial riveting process parameters, the initial riveting process parameters as target riveting process parameters when the riveting quality of the riveted points in the flat riveting assembly meets the riveting quality requirements; a first riveting module, for riveting a gradient-width flat-plate riveting assembly designed based on the target riveting process parameters, and in the case where cracks begin to appear at a riveting point, determining a distance between the riveting point where the cracks appear and a preset point in a lower die casting of the gradient-width flat-plate riveting assembly as a first width; a second riveting module, for riveting a stepped-diameter circular flat plate riveting assembly designed based on the target riveting process parameters and the first width, and in the case that there is a lower layer die casting without cracks, determining the radius of the lower layer die casting without cracks as a second width, wherein the stepped-diameter circular flat plate riveting assembly includes a plurality of circular lower layer die castings with different radii; The second determination module is used to determine a target self-piercing riveting overlap amount based on the second width and a preset riveting die radius, and obtain a lower die casting of the target riveted assembly based on the target self-piercing riveting overlap amount.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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