A two-stage aging correction method for thick and thin-walled components by regression creep

Abstract

The present invention provides a regression creep double-stage aging correction method for thick and thin-walled components. The method comprises the following steps: obtaining a component to be corrected, and obtaining performance data of the component material based on the component material; determining the process parameters of the regression heat treatment and the process parameters of the creep aging correction treatment based on the performance data of the component and orthogonal experiments; obtaining a finite element model of the component, and using finite element software to simulate the double-stage aging correction process of the component to obtain a correction profile; based on the preset target profile and the correction profile, using the springback compensation method to perform springback compensation calculation to determine the mold profile; obtaining a correction mold based on the mold profile; based on the correction mold, correcting the component according to the steps of first regression heat treatment and then creep aging correction treatment to obtain the corrected component. The correction method provided by the present invention has the advantages of high forming accuracy, good mechanical properties of the formed material, and short correction process cycle.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal shaping of metal plates, and in particular to a regression creep double-stage aging shaping method for thick and thin-walled components. Background Art

[0002] Creep aging forming technology is a form-property collaborative manufacturing technology that uses the creep characteristics of metals to perform forming and aging simultaneously. There have been many cases of using creep aging technology to produce and process metal components at home and abroad, most of which are large thin-walled components for aerospace. At present, the loading method used in creep aging forming technology is generally air pressure loading, but the shortcomings of pressurizing equipment and vacuum sealing devices limit the pressure of air pressure loading, and some thick and thin-walled components are difficult to load to the target shape. Therefore, for the forming of such thick and thin-walled components, more plastic forming processes such as rolling and press bending are used.

[0003] The large deformation of thick thin-walled components during plastic forming processes such as rolling and bending will bring great uncertainty to the component forming deviation, and there is generally a large residual stress inside the sheet after forming, which makes the forming time cycle longer and the component forming accuracy is limited by the operator's experience and techniques; at the same time, due to the existence of residual stress, the accuracy of the component in the subsequent process flow and service process is difficult to guarantee. In addition, general aerospace thin-walled components have a certain degree of symmetry, and the deformation during the forming process is often asymmetric, which will lead to asymmetry in the roundness deviation, straightness deviation and torsion deviation of the formed component. This situation is common and difficult to calibrate. Summary of the invention

[0004] The purpose of the present invention is to provide a method that can solve the technical problem of difficulty in shaping caused by asymmetric deformation and uncertain forming deviation after the forming of thick and thin-walled components, and has the advantages of high forming accuracy, good mechanical properties of the material after forming, and short shaping process cycle.

[0005] In order to achieve the above object, the present invention provides a regression creep double-stage aging shaping method for thick thin-walled components, wherein the regression creep double-stage aging shaping method comprises a regression heat treatment and a creep aging shaping treatment performed in sequence, and the method comprises the following steps:

[0006] (1) obtaining a component to be shaped, and obtaining performance data of the component material based on the component material of the component, wherein the performance data includes heat treatment parameters, original yield strength, and original elongation;

[0007] (2) based on the performance data of the component and orthogonal experiments, determining the process parameters of the regression heat treatment and the process parameters of the creep aging correction treatment, wherein the process parameters of the regression heat treatment include a regression temperature and a regression time, and the process parameters of the creep aging correction treatment include a creep temperature and a creep time;

[0008] (3) obtaining a finite element model of the component, and using the finite element model, the process parameters of the regression heat treatment, and the process parameters of the creep aging shaping treatment as input, simulating the double-stage aging shaping process of the component using finite element software to obtain a simulation result, wherein the simulation result includes a shaping surface obtained after the component is unloaded and rebounded;

[0009] (4) Based on the preset target profile and the correction profile, a springback compensation method is used to perform springback compensation calculation to determine the mold profile;

[0010] (5) obtaining a correction mold based on the mold profile, wherein the profile of the correction mold is the same as the mold profile;

[0011] (6) Based on the shaping die, the component is shaped according to the steps of first returning to heat treatment and then creep aging shaping treatment to obtain a shaped component.

[0012] In a specific implementation, the shape correction process of step (6) includes:

[0013] Placing the component on the shaping mold, and using mechanical loading or vacuum loading to make the component completely fit the molding surface of the shaping mold;

[0014] Place the bonded shaping mold and components as a whole in the shaping device, heat to the return temperature, keep warm for the return time, and then air cool;

[0015] The cooled shaping mold and the component are placed in the shaping device again as a whole, heated to the creep temperature, kept at the creep temperature for a certain time, slowly cooled to 100°C-120°C in the furnace, taken out and air-cooled to obtain the shaped component.

[0016] In a specific embodiment, the step (1) comprises:

[0017] Obtain the component to be calibrated;

[0018] querying heat treatment parameters of the component material of the component, wherein the heat treatment parameters include regression temperature;

[0019] The original yield strength and original elongation of the component material are obtained based on a metal tensile test method.

[0020] In a specific embodiment, in step (2)

[0021] The method for determining the regression temperature includes:

[0022] Using the regression temperature in the heat treatment parameters as the regression temperature of the regression heat treatment;

[0023] The method for determining the creep temperature and the creep time includes:

[0024] Subjecting the component material to multiple creep tests under a predetermined orthogonal scheme to obtain multiple creep results corresponding to the multiple creep tests, wherein the orthogonal scheme includes multiple creep test temperatures and multiple creep test times corresponding to each creep test temperature, and each creep result includes a creep amount, a creep yield strength, and a creep elongation;

[0025] Determine the creep temperature and creep time based on a plurality of ratios of the creep yield strength to the original yield strength, a plurality of ratios of the creep elongation to the original elongation, and a plurality of creep amounts, wherein the creep temperature is one of a plurality of creep test temperatures, and the creep time is one of a plurality of creep test times;

[0026] The method for determining the regression time includes:

[0027] Processing a plurality of test components made of the component material according to the steps of first regression treatment and then creep treatment to obtain a plurality of processed components, wherein the plurality of test components have the same regression temperature and different regression test times when undergoing regression treatment, and the creep treatment of the plurality of test components all adopts the creep temperature and the creep time in the process parameters of the creep aging correction treatment;

[0028] Obtaining the processing yield strength and processing elongation of multiple processed components based on metal tensile test methods;

[0029] An optimal mechanical property group is determined based on the processing yield strength and processing elongation of the plurality of processed components, and the regression experiment time corresponding to the optimal mechanical property group is the regression time.

[0030] In a specific embodiment, the step (3) further comprises:

[0031] Establishing a creep constitutive subprogram based on the creep aging constitutive subprogram of the component material;

[0032] The simulation of the double-stage aging correction process of the component by using finite element software also includes calling the creep constitutive subroutine.

[0033] In a specific embodiment, after step (6), the method further comprises:

[0034] Obtaining a 3D model of the calibrated component;

[0035] Comparing the correction three-dimensional model with the target profile to obtain a correction deviation comparison result, wherein the correction deviation comparison result includes roundness deviation, distortion deviation and generatrix straightness deviation;

[0036] When the shape correction deviation comparison result meets the preset deviation condition, the calibrated component is a shape correction component with qualified shape correction accuracy; or when the shape correction deviation comparison result does not meet the preset deviation condition, the calibrated component returns for re-calibration; wherein the preset deviation conditions include the roundness deviation being less than a first preset value, the distortion deviation being less than a second preset value, and the busbar straightness deviation being less than a third preset value.

[0037] In a specific embodiment, after step (6), the method further comprises:

[0038] Obtaining residual stress values ​​on the inner surface and the outer surface of the component after shape correction;

[0039] When the absolute values ​​corresponding to the residual stress value of the inner surface and the residual stress value of the outer surface are both smaller than the preset target residual stress, the shaped component is a shaped component with qualified shaped mechanical properties.

[0040] In a specific embodiment, the shaping mold comprises:

[0041] A support frame, the support frame comprising a base, and two stoppers arranged on the base in parallel and spaced apart along a first direction;

[0042] A plurality of bases, wherein the plurality of bases are arranged in parallel and spaced apart on the base along the second direction to form a lattice base, two ends of the bases are respectively fixedly connected to the two stoppers, and each of the bases comprises a plurality of bolt holes arranged at equal intervals;

[0043] A plurality of first bolts are respectively inserted into the plurality of bolt holes to form a matrix bolt, wherein the length of each first bolt inserted into the bolt hole is adjustable to match different mold profiles.

[0044] In a specific embodiment, the step of obtaining a shape-correcting mold, wherein the profile of the shape-correcting mold is the same as the profile of the mold, comprises:

[0045] Determining the support frame according to the shape of the component;

[0046] Determining the lattice height of the lattice bolts according to the mold profile;

[0047] Adjust the height of each of the first bolts based on the lattice height so that the surface of the lattice bolt forms a profile that is the same as the mold profile;

[0048] The lattice base is fixedly connected to the support frame.

[0049] In a specific embodiment, the component is formed by a roll bending process or a press bending process.

[0050] The beneficial effects of the present invention include at least:

[0051] 1. In the embodiment of the present disclosure, firstly, based on the three-dimensional model of the component and the determined regression heat treatment parameters and creep aging correction treatment parameters, finite element software is used for simulation, and the correction profile is obtained through the simulation structure. Then, the springback compensation calculation is performed according to the springback compensation algorithm to determine the mold profile, and a relatively deformed mold with the same profile as the mold profile is obtained. Then, the component is corrected according to the steps of first regression heat treatment and then creep aging correction treatment to obtain the corrected component. In this way, on the one hand, the present invention is based on the profile of the component to be corrected and the mold profile is determined by simulation using finite element software, so that the mold profile used in the correction process is completely matched with the component to be corrected, and components to be corrected with different deformations in the same batch are corrected using different mold profiles, which can be Targeted correction compensation is achieved according to the different roundness deviations, torsion deviations and busbar straightness deviations of each component to be corrected; on the other hand, the correction process of the present invention adopts a correction process that combines regression heat treatment and creep aging correction treatment. The regression treatment causes part of the microstructure inside the component material to remelt, so that the component is loaded into a symmetrical shape. During the creep aging correction treatment, fine precipitated phases inside the component material are re-precipitated to ensure the strength of the material. Therefore, regression + correction can achieve coordinated correction of shape and properties. At the same time, by reasonably controlling the regression temperature, regression time, creep temperature and creep time, the internal microstructure of the material can be regulated, so that the component obtained by correction has higher forming accuracy and can also reduce the residual stress inside the material.

[0052] 2. The shaping method provided by the present invention is used to calibrate multiple 2219 aluminum alloy conical wall panels. After the correction, the surface accuracy deviation is less than 10 mm, and the generatrix straightness deviation and roundness deviation are both less than 5 mm; the residual stress on the inner surface and the residual stress on the outer surface of the component material are reduced to within 80 MPa.

[0053] 3. The shaping method provided by the present invention is used for shaping, which has the advantages of high forming accuracy, good mechanical properties of the material after forming (the average tensile strength of the furnace parts after creep aging shaping is 418.65MPa, which is 4.085% lower than the initial tensile strength of 436.48MPa, and the average yield strength and elongation are higher than the standard values ​​of 2219 aluminum alloy rockets, which are 320MPa and 8% respectively), and short shaping process cycle (the creep time of this shaping process does not exceed 5h). BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A schematic diagram of the steps of a regression creep double-stage aging correction method for a thick and thin-walled component provided by an embodiment of the present invention;

[0055] Figure 2 It is a structural schematic diagram of the initial state of the finite element model of the component;

[0056] Figure 3 A comparison diagram of the creep aging constitutive fitting creep curve provided by the present invention and the creep curves of 2219 aluminum alloy at different stress levels;

[0057] Figure 4 It is a schematic diagram of the temperature variation with time during the regression creep aging process;

[0058] Figure 5 A schematic structural diagram of a mold provided by an embodiment of the present invention;

[0059] Figure 6 for Figure 5 Structural schematic diagram of the middle support frame;

[0060] Figure 7 for Figure 5 Schematic diagram of the structure of the middle base;

[0061] Figure 8 for Figure 5 A magnified view of part A;

[0062] Fig. 9 This is a comparison result diagram of the profile accuracy of the 2219 aluminum alloy conical wall panel before and after regression creep aging correction provided by the present invention.

[0063] Description of reference numerals:

[0064] Shape correction mold 100 Support frame 10 Base 11 Upper surface 111 Lower surface 113 Grooves 115 Stopper 13 Fixing holes 131 Base 20 Bolt Holes 21 Base body 23 Base fixing part 25 Countersunk inclined hole 27 Dot matrix base 20A First Bolt 30 Lattice Bolts 30A Second bolt 40 DETAILED DESCRIPTION

[0065] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0066] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0067] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0068] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The drawings only show components related to the present disclosure rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0069] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0070] The present invention provides a regression creep double-stage aging correction method for thick thin-walled components. Figure 1 As shown, the method comprises the following steps:

[0071] Step S10, obtaining a component to be shaped, and obtaining performance data of the component material based on the component material of the component, wherein the performance data includes heat treatment parameters, original yield strength and original elongation;

[0072] The step S10 comprises:

[0073] (1) Obtain the component to be calibrated;

[0074] In this embodiment, the component to be shaped is a thick aluminum alloy thin-walled component. Due to the pressure of gas pressure loading, it cannot be formed by creep aging forming technology, and is mainly formed by plastic forming methods such as rolling bending or press bending.

[0075] Preferably, the component to be shaped is a component formed by a rolling bending process or a press bending process, which has the characteristics of low forming accuracy and large residual stress.

[0076] It should be noted that the components not defined below refer to the components to be calibrated.

[0077] (2) querying heat treatment parameters of the component material of the component, wherein the heat treatment parameters include regression temperature;

[0078] In this embodiment, the component is a thick aluminum alloy thin-walled component, specifically 2219 aluminum alloy, and the regression temperature corresponding to the aluminum alloy is directly queried in the aluminum alloy heat treatment manual.

[0079] In this embodiment, the regression temperature is 240°C.

[0080] In the embodiments thereof, the component material may also be other alloy materials, which is not limited in the present invention.

[0081] (3) Obtaining the original yield strength and original elongation of the component material based on the metal tensile test method.

[0082] In this embodiment, the metal tensile test method adopted is the national standard GB / T 2039-2012.

[0083] Preferably, the performance data also includes an inner surface initial residual stress value and an outer surface initial residual stress value, which can be measured using an XRD residual stress analyzer.

[0084] In the present invention, the initial residual stress value of the inner surface and the initial residual stress value of the outer surface are compared with the residual applied force value after the shape correction, which can be used to judge the effect of the shape correction.

[0085] Preferably, the performance data also includes basic data related to the performance of the component material, including material properties, temperature, friction coefficient, load curve, etc.

[0086] The above-mentioned methods for acquiring basic data all adopt the methods provided by the prior art, which do not belong to the innovation of the present invention.

[0087] Step S20, based on the performance parameters of the component and the orthogonal experiment, determining the process parameters of the regression heat treatment and the process parameters of the creep aging shaping treatment, wherein the component is a component to be shaped, the process parameters of the regression heat treatment include a regression temperature and a regression time, and the process parameters of the creep aging shaping treatment include a creep temperature and a creep time;

[0088] In this step:

[0089] The method for determining the regression temperature includes:

[0090] Using the regression temperature in the heat treatment parameters as the regression temperature of the regression heat treatment;

[0091] In this embodiment, the regression temperature is determined by looking up the regression temperature in the heat treatment manual.

[0092] The method for determining the creep temperature and the creep time includes:

[0093] (1) subjecting a component material to multiple creep tests under a predetermined orthogonal scheme to obtain multiple creep results corresponding to the multiple creep tests, wherein the orthogonal scheme includes multiple creep test temperatures and multiple creep test times corresponding to each creep test temperature, and each creep result includes a creep amount, a creep yield strength, and a creep elongation;

[0094] In this embodiment, a creep experiment is conducted using a metal high temperature tensile creep test method, which is based on national standards GB / T 2039-2012 and GB / T 10120-2013.

[0095] The orthogonal scheme includes multiple creep test temperatures and multiple creep test times corresponding to each creep temperature. It can be understood that if the number of creep test temperatures is M and the number of creep test times is N, then the orthogonal scheme includes a total of M*N experiments. For ease of understanding, for example, if the number of creep test temperatures is 3, namely M1, M2, and M3, and the number of creep test times is 5, namely N1, N2, N3, N4, and N5, then the orthogonal scheme includes a total of 15 orthogonal experiments, and the creep test temperature and creep test time corresponding to each orthogonal experiment are shown in Table 1:

[0096]

[0097] Table 1 Parameters of orthogonal experimental design

[0098] In this embodiment, three creep test temperatures are set, namely 180°C, 190°C and 200°C.

[0099] Preferably, this step also includes obtaining a plurality of creep curves corresponding to the plurality of creep test temperatures, wherein the creep curves are plotted at the same creep test temperature with a plurality of different creep test times as the horizontal coordinates and the creep amounts corresponding to the plurality of different creep test times as the vertical coordinates.

[0100] The number of creep curves is the same as the number of creep test temperatures. When there are three creep test temperatures, the number of creep curves is also three. For example, the creep curve corresponding to the creep test temperature M1 is plotted with the creep amount of five creep tests corresponding to the experimental conditions M1\N1, M1\N2, M1\N3, M1\N4, and M1\N5 as the ordinate and N1, N2, N3, N4, and N5 as the abscissa.

[0101] In this embodiment, the creep yield strength and creep elongation of the component material after creep are tested by a metal tensile test, and the number of creep yield strength data and the number of creep elongation data obtained by measurement are the same as the number of orthogonal experiments.

[0102] (2) determining the creep temperature and creep time based on a plurality of ratios of the creep yield strength to the original yield strength, a plurality of ratios of the creep elongation to the original elongation, and a plurality of the creep amounts, wherein the creep temperature is one of the plurality of creep test temperatures, and the creep time is one of the plurality of creep test times;

[0103] This step specifically includes:

[0104] Calculating the ratio of the creep yield strength to the original yield strength corresponding to each creep test respectively to obtain a plurality of first ratios;

[0105] Calculating the ratio of the creep elongation to the original elongation corresponding to each creep experiment respectively to obtain a plurality of second ratios;

[0106] Determining a plurality of target creep experiments based on the first ratio and the second ratio, wherein the first ratio corresponding to the plurality of target creep experiments is greater than a first preset ratio and the second ratio is greater than a second preset ratio;

[0107] The creep amounts corresponding to the plurality of target creep experiments are compared to determine that the creep experiment temperature and the creep experiment time corresponding to the target creep experiment with the maximum creep amount are the creep temperature and the creep time, respectively.

[0108] The first preset ratio and the second preset ratio are both preset data and can be adjusted. Under normal circumstances, they are determined according to customer requirements. For example, the first preset ratio and the second preset ratio can be 90%, 95%, 98%, etc., which are not listed here. In this embodiment, the first preset ratio is 95% and the second preset ratio is 95%.

[0109] The process of determining the creep temperature and creep time is as follows: among all the results satisfying that the ratio of the creep yield strength to the original yield strength is greater than a first preset ratio, and the ratio of the creep elongation to the original elongation is greater than a second preset ratio, the creep test temperature corresponding to the maximum creep amount is determined as the creep temperature, and the creep test time is determined as the creep time. For ease of understanding, further examples are given to illustrate that the first preset ratio is set to 95%, and the second preset ratio is set to 95%; assuming that the creep test temperature is 190°C and the creep holding time is 4 hours, the ratio of the creep yield strength to the original yield strength is 92%, the ratio of the creep elongation to the original elongation is 96%, and the creep amount is A1; assuming that the creep test temperature is 200°C and the creep test time is 4.5 hours, the ratio of the creep yield strength to the original yield strength is 95%, the ratio of the creep elongation to the original elongation is 97%, and the creep amount is A2; assuming that the creep test temperature is 200°C and the creep test time is 5 hours, the ratio of the creep yield strength to the original yield strength is 96%, the ratio of the creep elongation to the original elongation is 95%, and the creep amount is A3; A1 is greater than A2 and greater than A3. According to the above experimental results, it is determined that the creep temperature is 190°C and the creep time is 4.5 hours.

[0110] The method for determining the regression time includes:

[0111] Processing a plurality of test components made of the component material according to the steps of first regression treatment and then creep treatment to obtain a plurality of processed components, wherein the plurality of test components have the same regression temperature and different regression test times when undergoing regression treatment, and the creep treatment of the plurality of test components all adopts the creep temperature and the creep time in the process parameters of the creep aging correction treatment;

[0112] Obtaining the processing yield strength and processing elongation of multiple processed components;

[0113] An optimal mechanical property group is determined based on the processing yield strength and processing deformation elongation of a plurality of the processed components, and the regression experiment time corresponding to the optimal mechanical property group is the regression time.

[0114] Specifically, a plurality of components are subjected to regression treatment and then to creep treatment respectively. The regression temperature used in the regression treatment is the regression temperature determined above, and the regression time is a plurality of preset regression times, which may be 1h, 2h, 3h, 4h, 5h, etc. The creep temperature and creep time used in the creep treatment are the creep temperature and creep time determined above, that is, the creep temperature and the creep time in the process parameters of the creep aging correction treatment. While keeping the creep treatment conditions and the regression temperature the same, the influence of the regression time on the performance of the processed components is investigated, and the regression time is determined based on the performance results of the processed components.

[0115] The specific method for determining the best mechanical property group is as follows: when the yield strength and elongation of the component material are simultaneously maximum, the best mechanical property group is the group when the processing yield strength and processing elongation of the component material are maximum; when the yield strength and elongation of the component material are not simultaneously maximum, the group with the largest sum of the processing yield strength and the processing elongation is selected as the group with the best mechanical property.

[0116] Step S30, obtaining a finite element model of the component, and using the finite element model, the process parameters of the regression heat treatment and the process parameters of the creep aging shaping treatment as input, simulating the double-stage aging shaping process of the component using finite element software to obtain a simulation result, wherein the simulation result includes a shaping surface obtained after the component is unloaded and rebounded;

[0117] Please refer to Figure 2 , the steps of obtaining the finite element model of the component include:

[0118] Scanning the component to obtain a scanned surface, and using the scanned surface as a mesh unit of a finite element to construct an initial finite element model;

[0119] The initial residual stress values ​​of the inner surface and the outer surface of the component are introduced into the initial finite element model as the initial deformation state of the grid unit to obtain the finite element model of the component.

[0120] In other embodiments, the initial finite element model may also be directly used as the finite element model of the obtained component.

[0121] In this embodiment, the simulation is performed using finite element software MSC.Marc.

[0122] Preferably, the simulation can also predict stress-strain distribution, stress-creep response, and microstructure evolution during the shaping process.

[0123] In this embodiment, when the finite element software MSC.Marc is used for simulation, the stress-strain distribution, stress-creep response, and microstructure evolution law in the correction process can also be predicted, that is, the simulation results also include stress-strain distribution, stress-creep response, and microstructure evolution law; correspondingly, the input also includes basic data such as material properties, temperature, friction coefficient, load curve, etc., which are all related to the performance of the component material. In this embodiment, the material of the component is 2219 aluminum alloy. When the finite element software is simulated, the input temperature is 190°C, and the material properties are the mechanical properties of 2219 aluminum alloy at 190°C, including yield strength of 252MPa, tensile strength of 288MPa, friction coefficient of 0.3, contact tolerance of 0.5, and offset coefficient of 0.95.

[0124] Preferably, the step S30 further includes:

[0125] Establishing a creep constitutive subprogram based on the creep aging constitutive subprogram of the component material;

[0126] The simulation of the double-stage aging correction process of the component by using finite element software also includes calling the creep constitutive subroutine.

[0127] In this embodiment, Figure 3 This is a comparison chart of creep aging constitutive simulation data and experimental data provided by the present invention, in which the straight line represents the creep aging constitutive simulation data, and the discrete data points represent the experimental data. From this chart, the accuracy of creep aging constitutive simulation of 2219 aluminum alloy creep deformation can be judged.

[0128] Since the constitutive formula used by the finite element software itself to calculate creep deformation is a bit simple, the accuracy of the calculated creep deformation is not high. When simulating the creep aging correction process of the component, calling the creep constitutive subroutine to perform calculations can further improve the accuracy of the creep deformation and thus improve the accuracy of the determined mold surface.

[0129] Step S40, based on the preset target profile and the correction profile, a springback compensation method is used to perform springback compensation calculation to determine the mold profile;

[0130] In the present invention, the preset target profile is a target profile corresponding to a target shape of a component, and the target shape of the component is a designed shape.

[0131] The springback compensation method involved in this step may be a springback compensation method disclosed in the prior art, and specifically, reference may be made to a springback compensation method for creep aging forming disclosed in Patent Publication No. CN108920847A.

[0132] Step S50, obtaining a correction mold based on the mold profile, wherein the profile of the correction mold is the same as the mold profile;

[0133] The shaping mold can be a fixed forming mold or a flexible mold with an adjustable mold surface. Preferably, the shaping mold is a flexible mold with an adjustable mold surface. When the same batch of preliminarily formed components are shaped, if the distribution of roundness deviation, torsion deviation and generatrix straightness deviation of different components is different, then the determined mold surface is also different. If a fixed forming mold is used for shaping, multiple fixed forming molds must be provided, which has high production costs; while a flexible mold with an adjustable mold surface only needs to be adjusted according to the determined mold surface, and only one shaping mold can be used, which has low production costs.

[0134] Step S60: Based on the shaping die, the component is shaped according to the steps of first returning to heat treatment and then creep aging shaping treatment to obtain a shaped component.

[0135] Please refer to Figure 4 , the calibration process of this step includes:

[0136] 1) placing the component on the shaping mold, and using mechanical loading or vacuum loading to make the component completely fit the molding surface of the shaping mold;

[0137] 2) Place the bonded shaping mold and components as a whole in the shaping device, heat to the return temperature, keep warm for the return time, and then air cool;

[0138] The regression temperature is related to the material of the component and can be directly queried in the aluminum alloy heat treatment manual based on the material. In this embodiment, the regression temperature of the component material 2219 aluminum alloy is 240°C, which is higher than the artificial aging temperature of the component material and lower than the solution temperature.

[0139] During the regression heat treatment, the component material is heated to the regression temperature and kept warm for a short time to remelt the internal microstructure of the material. After the insulation is completed, the component is quickly cooled by air cooling, so that the deviation of the component presents a more symmetrical distribution, which is convenient for the next step of creep aging correction treatment.

[0140] In this embodiment, the heating rate is 5°C / min.

[0141] In this embodiment, the regenerative heat treatment device is an autoclave, and in other implementations, it can also be an aging furnace.

[0142] 3) The cooled shaping mold and the component are placed in the shaping device again as a whole, heated to the creep temperature, kept at the creep temperature for a certain time, and then slowly cooled to 100°C-120°C in the furnace, taken out and air-cooled to obtain the shaped component.

[0143] Creep aging treatment is used to make components achieve higher shape accuracy. During the creep process, fine precipitates inside the material re-precipitate, and the material strength is further improved.

[0144] The creep temperature is related to the component material. In this embodiment, the corresponding creep temperature of the component material 2219 aluminum alloy is 190° C. The creep time is related to the mechanical properties and creep amount of the component after correction.

[0145] In this embodiment, the creep aging treatment is performed by autoclaving.

[0146] It should be noted that the creep-treated component is kept warm for the creep period and then slowly cooled to 100°C-120°C. The temperature of 100°C-120°C is determined by the safety operating specifications of high-temperature pressure equipment.

[0147] In the disclosed embodiment, firstly, based on the three-dimensional model of the component and the determined regression heat treatment parameters and creep aging correction treatment parameters, finite element software is used for simulation, and the correction profile is obtained through the simulation structure. Then, the springback compensation calculation is performed according to the springback compensation algorithm to determine the mold profile, and a relatively shaped mold with the same profile as the mold profile is obtained. Then, the component is corrected according to the steps of first regression heat treatment and then creep aging correction treatment to obtain the corrected component. In this way, on the one hand, the present invention is based on the profile of the component to be corrected and uses finite element software to simulate and determine the mold profile, so that the mold profile used in the correction process is completely matched with the component to be corrected. Different mold profiles are used for correction of components to be corrected in the same batch with different deformations, so that Targeted correction compensation is achieved for the different roundness deviations, torsion deviations and busbar straightness deviations of each component to be corrected; on the other hand, the correction process of this aspect adopts a correction process that combines regression heat treatment and creep aging correction treatment. The regression treatment causes part of the microstructure inside the component material to remelt, so that the component is loaded into a symmetrical shape. During the creep aging correction treatment, the fine precipitated phases inside the component material are re-precipitated, which can ensure the strength of the material. Therefore, regression + correction can achieve coordinated correction of shape and properties. At the same time, by reasonably controlling the regression temperature, regression time, creep temperature and creep time, the internal microstructure of the material can be regulated, so that the component obtained by correction has higher forming accuracy and can also reduce the residual stress inside the material.

[0148] Furthermore, after step S60, the method further includes a step of judging whether the shaped component is qualified. Specifically:

[0149] The method further comprises:

[0150] Obtaining a 3D model of the calibrated component;

[0151] Comparing the correction three-dimensional model with the target profile to obtain a correction deviation comparison result, wherein the correction deviation comparison result includes roundness deviation, distortion deviation and generatrix straightness deviation;

[0152] When the shape correction deviation comparison result meets the preset conditions, the calibrated component is a shape correction component with qualified shape correction accuracy; or when the shape correction deviation comparison result does not meet the preset conditions, the calibrated component returns for re-calibration; wherein the preset conditions include the roundness deviation being less than a first preset value, the distortion deviation being less than a second preset value, and the busbar straightness deviation being less than a third preset value.

[0153] and / or

[0154] Obtaining the correction residual stress value of the inner surface and the correction new residual stress value of the outer surface of the component after correction;

[0155] When the absolute values ​​corresponding to the correction residual stress value of the inner surface and the correction residual stress value of the outer surface are both smaller than the preset target residual stress values, the corrected component is a corrected component with qualified correction mechanical properties.

[0156] Specifically:

[0157] After the component is shaped according to the preset shaping process, it is necessary to determine whether the shaped component is qualified. Generally speaking, the preset conditions for determining whether it is qualified are determined based on the customer's processing requirements. For ease of understanding, if the customer has particularly high requirements for the shaping accuracy of the component, the first preset value, the second preset value, and the third preset value can be 0.3mm, 0.4mm, 0.5mm and other values. When the customer does not have high requirements for the shaping accuracy of the component, the first preset value, the second preset value, and the third preset value can be 0.8mm, 1.0mm, 1.5mm, 2mm and other values.

[0158] When the accuracy of the calibrated component cannot meet the preset conditions, the calibration can be returned to the previous step, that is, the component provided in step 1 can be calibrated again.

[0159] In this embodiment, the calibrated three-dimensional model is obtained by three-dimensionally scanning the profile of the component after the calibration.

[0160] In this embodiment, the ATOS professional software from the German GOM company is used to compare the calibration 3D model with the target surface.

[0161] In this embodiment, an XRD residual stress analyzer is used to test the residual stress of the inner and outer surfaces of the shaped component to obtain data on the residual stress values ​​of the inner and outer surfaces of the shaped component.

[0162] In this embodiment, the preset value of the target residual stress is 80 MPa. When the absolute values ​​of the inner surface residual stress value and the outer surface residual stress value are both less than 80 MPa, the shaped component is a shaped component with qualified shaped mechanical properties.

[0163] Please refer to Figures 5 to 8 , further, the shape correction mold 100 comprises:

[0164] A support frame 10, the support frame 10 comprises a base 11 and two stoppers 13 arranged on the base 11 in parallel and spaced apart along a first direction;

[0165] A plurality of bases 20, wherein the plurality of bases 20 are arranged in parallel and spaced apart on the base 11 along the second direction to form a lattice base 20A, wherein two ends of the base 20 are respectively fixedly connected to two of the stoppers 13, and the base 20 is provided with a plurality of bolt holes 21 arranged at equal intervals along the third direction;

[0166] A plurality of first bolts 30 are respectively inserted into the plurality of bolt holes 21 to form a matrix bolt 30A, wherein the length of each first bolt 30 inserted into the bolt hole 21 is adjustable to match different mold profiles.

[0167] The shaping mold provided in this embodiment is a flexible mold with an adjustable mold surface. By adjusting the distance between the surface of the first bolt 30 away from the base 11 and the base 20, the surface of the matrix bolt 30A can form different mold surfaces. In this way, when the same batch of components have different deviation distributions, it is only necessary to adjust the height of the matrix bolt to obtain a mold surface that matches the component, which reduces the cost and ensures higher shaping accuracy.

[0168] The structure of the support frame 10 is determined according to the component to be shaped, and can be varied. Before shaping, the support frame 10 can be selected according to the appearance of the component to be shaped.

[0169] In this embodiment, the support frame 10 is a support frame suitable for the conical wall plate. The base 11 of the support frame 10 includes an upper surface 111 facing the base 20, a lower surface 113 arranged opposite to the upper surface 111, and a groove 115 formed by being recessed from the upper surface 111 toward the lower surface 113. Two stoppers 13 are fixedly arranged in the groove 115 at intervals along the width direction of the groove 115. The two stoppers 13 are arc-shaped structures and are symmetrically arranged about the center line of the groove 115.

[0170] In this embodiment, the plurality of bases 20 are used to carry the matrix bolts 30A. The bases 20 are made of square steel. The bottom surface of the base 20 facing the base 11 and the top surface away from the base 11 are parallel to each other, and the parallelism is not less than 0.05 mm.

[0171] It should be noted that the fixed connection between the base 20 and the two stoppers 13 is a detachable fixed connection, so that the base 20 can be installed on different support frames, and has strong portability.

[0172] Preferably, the plurality of bases 20 are arranged at equal intervals, and the interval between two adjacent bases 20 is 5 to 20 mm.

[0173] The spacing between two adjacent bases 20 is between 5 and 20 mm, and can be specifically 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, etc., which are not listed here in detail. The spacing between two adjacent bases 20 is determined according to the force conditions. The greater the force, the smaller the spacing between the two adjacent bases 20.

[0174] Preferably, the distance between two adjacent bolt holes 21 on the same base 20 is 45-75 mm.

[0175] The spacing between two adjacent bolt holes 21 on the same base 20 is between 45 and 75 mm, and can be specifically 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, etc., which are not enumerated here. The spacing between two adjacent bolt holes 21 is related to the design surface and stress conditions of the component to be shaped.

[0176] Preferably, the base 20 includes a base body 23 having the bolt hole 21 , and two base fixing parts 25 extending from both ends of the base body 23 , respectively. The two base fixing parts 25 are respectively mounted on the two stoppers 13 and fixedly connected to the stoppers 13 .

[0177] In this embodiment, the base 20 is a strip-shaped structure, the surface of the base fixing portion 25 away from the base 11 and the surface of the base main body 23 away from the base 11 are located in the same plane, and the thickness of the base main body 23 is smaller than the thickness of the base main body 23. This design makes it convenient to fix the base 20 and the block 13.

[0178] Preferably, along the insertion direction of the first bolt 30 , the sum of the heights of the base fixing portion 25 and the stopper 13 is the same as the height of the base main body 23 .

[0179] This design is to improve the bearing capacity of the base 20 .

[0180] Preferably, the base 20 also includes a countersunk inclined hole 27 opened in the base fixing portion 23, and the block 13 is provided with a plurality of fixing holes 131 for cooperating with the countersunk inclined hole 27 of each of the bases 20; the shaping mold 100 also includes a plurality of second bolts 40, and the plurality of second bolts 40 are sequentially inserted into the countersunk inclined hole 27 and the fixing hole 131 to connect the base 20 and the support frame 10.

[0181] The base 20 and the support frame 10 are fixedly connected by bolt connection, which is convenient for installation and disassembly.

[0182] Preferably, the first direction and the second direction are perpendicular to each other, and the first direction and the third direction are parallel to each other.

[0183] In this embodiment, the first direction refers to the width direction of the base 11 toward the upper surface 111 of the base 20, the second direction refers to the length direction of the base 11 toward the upper surface 111 of the base 20, and the third direction is the length direction of the base 20.

[0184] Preferably, the first bolt 30 is a ball bolt or a round head hexagon socket bolt.

[0185] The first bolt 30 is a ball bolt or a round head hexagon socket bolt, which can accurately determine the height of the first bolt 30 and reduce the surface damage of the first bolt 30 to the component to be calibrated, further improving the applicability of the mold.

[0186] Among them, ball head bolts are suitable for situations where high surface quality requirements are required for the components to be shaped, while round head hexagon socket bolts are suitable for situations where the sheet metal is thicker.

[0187] Preferably, the first bolt 30 is made of stainless steel with a strength of more than 8.9, and the second bolt 40 is made of alloy steel with a strength of more than 12.9.

[0188] The first bolt 30 is made of stainless steel and has a strength of more than 8.9 to ensure that the lattice bolt 20A does not fail at high temperatures; the second bolt 40 is made of alloy steel and has a strength of more than 12.9 to ensure the connection strength between the base 20 and the support frame 10.

[0189] Preferably, the support frame 10 is a support frame for conical wall panel correction or a support frame for flat plate correction.

[0190] It should be supplemented that the support frame 10 may also be other support frames for thin-walled component shape correction that are not listed in the embodiments.

[0191] Furthermore, the step of obtaining a shape-correcting mold, wherein the profile of the shape-correcting mold is the same as the profile of the mold, comprises:

[0192] (1) Determining the support frame according to the shape of the component;

[0193] (2) determining the lattice height of the lattice bolts according to the mold profile;

[0194] (3) adjusting the height of each of the first bolts based on the lattice height so that the surface of the lattice bolt forms a profile that is the same as the mold profile;

[0195] (4) The lattice base and the support frame are fixedly connected by a second bolt.

[0196] Before calibration, the lattice height of the lattice bolts is determined according to the mold profile, and then each first bolt is screwed in at the determined height so that the surface of the lattice bolts forms a mold profile that matches the component to be calibrated, so as to achieve targeted calibration compensation for the busbar straightness and roundness, and overcome the defects of fixed molds.

[0197] At the same time, the lattice base and the support frame are detachably connected. On the one hand, when adjusting the height of the first bolt, the lattice base can be disassembled and then adjusted, which is simple and reliable to operate; on the other hand, the same lattice base can also be disassembled to adapt to other support frames, which has a wider range of applications and can reduce the production cost of the correction mold.

[0198] The component to be calibrated in the embodiment of the present disclosure is a thick aluminum alloy thin-walled component. Due to the size of the air pressure loading pressure, the current existing technology mainly forms it through plastic forming processes such as rolling bending or press bending. The large deformation during the forming process of the above-mentioned plastic forming process will bring great uncertainty to the component forming deviation. The current existing technology uses a fixed forming mold and cannot specifically complete the calibration of components with unformed deviation distribution.

[0199] Example

[0200] A plurality of 2219 aluminum alloy conical wall panels to be calibrated are calibrated by the calibrating method provided by the present invention. The inner surface residual stress values ​​and the outer surface residual stress values ​​before calibration are shown in Tables 2 and 3, and the inner surface residual stress values ​​and the outer surface residual stress values ​​after calibration are shown in Tables 4 and 5. By comparing Tables 2 and 4, it can be seen that the inner surface residual applied force values ​​are greatly reduced, and by comparing Tables 3 and 5, it can be seen that the outer surface residual stresses are also greatly reduced.

[0201] Judging by the standard that the absolute value of residual stress of qualified parts is less than 80Mpa, among the 13 components being calibrated, only the residual stress value of the outer surface of one component did not meet the standard, and the residual stress values ​​of the inner and outer surfaces of all other components met the requirements, indicating a high qualification rate.

[0202] Table 2 Measurement results of residual stress on inner surface before correction

[0203] serial number N(1,1) N(1,2) N(1,3) N(1,4) N(2,1) N(2,2) N(2,3) Residual stress (MPa) +118.2 +146.1 +135.6 +80.0 +34.3 +32.8 +101 serial number N(2,4) N(2,5) N(3,1) N(3,2) N(3,3) N(3,4) Residual stress (MPa) +151.4 +171.2 +57.8 +112.3 +133.7 +82.6

[0204] Table 3 Measurement results of residual stress on the outer surface before correction

[0205] serial number W(1,1) W(1,2) W(1,3) W(1,4) W(2,1) W(2,2) W(2,3) Residual stress (MPa) -115.4 -143.5 -158.8 -140.9 -34.2 -93.1 -153.3 serial number w(2,4) W(3,1) W(3,2) W(3,3) W(3,4) W(3,5) Residual stress (MPa) -195.1 -82.9 -88.1 -107.6 -155.4 -133.4

[0206] Table 4 Measurement results of residual stress on inner surface after correction

[0207] serial number N(1,1) N(1,2) N(1,3) N(1,4) N(2,1) N(2,2) N(2,3) Residual stress (MPa) +51.3 +66.7 +41.6 +39.6 +20.3 +12.9 +36.8 serial number N(2,4) N(2,5) N(3,1) N(3,2) N(3,3) N(3,4) Residual stress (MPa) +71.4 +77.2 +36.1 +54.2 +63.5 +42.4

[0208] Table 5 Measurement results of residual stress on the outer surface after correction

[0209] serial number W(1,1) W(1,2) W(1,3) W(1,4) W(2,1) W(2,2) W(2,3) Residual stress (MPa) -64.7 -53.7 -71.6 -60.3 -24.6 -33.7 -63.5 serial number w(2,4) W(3,1) W(3,2) W(3,3) W(3,4) W(3,5) Residual stress (MPa) -95.7 -59.9 -48.6 -67.1 -63.2 -73.9

[0210] See also Fig. 9 , Fig. 9 The surface accuracy comparison results of the 2219 aluminum alloy conical wall panel before and after the regression creep aging correction provided by the present invention are as follows: Fig. 9 It can be seen that the surface accuracy of the tapered wall panel has been improved from more than 50 mm to within 10 mm.

[0211] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions and substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. A regression creep double-stage aging shaping method for thick thin-walled components, the regression creep double-stage aging shaping method comprising a regression heat treatment and a creep aging shaping treatment performed in sequence, characterized in that: The method comprises the following steps: (1) obtaining a component to be shaped, and obtaining performance data of the component material based on the component material of the component, wherein the performance data includes heat treatment parameters, original yield strength, and original elongation; (2) based on the performance data of the component and orthogonal experiments, determining the process parameters of the regression heat treatment and the process parameters of the creep aging correction treatment, wherein the process parameters of the regression heat treatment include a regression temperature and a regression time, and the process parameters of the creep aging correction treatment include a creep temperature and a creep time; (3) obtaining a finite element model of the component, and using the finite element model, the process parameters of the regression heat treatment, and the process parameters of the creep aging shaping treatment as input, simulating the double-stage aging shaping process of the component using finite element software to obtain a simulation result, wherein the simulation result includes a shaping surface obtained after the component is unloaded and rebounded; (4) Based on the preset target profile and the correction profile, a springback compensation method is used to perform springback compensation calculation to determine the mold profile; (5) obtaining a correction mold based on the mold profile, wherein the profile of the correction mold is the same as the mold profile; (6) Based on the shaping die, the component is shaped according to the steps of first regressive heat treatment and then creep aging shaping treatment to obtain a shaped component, wherein the shaping process of step (6) includes: Placing the component on the shaping mold, and using mechanical loading or vacuum loading to make the component completely fit the molding surface of the shaping mold; Place the bonded shaping mold and components as a whole in the shaping device, heat to the return temperature, keep warm for the return time, and then air cool; The cooled shaping mold and the component are placed in the shaping device again as a whole, heated to the creep temperature, slowly cooled to 100°C-120°C in the furnace after the creep time, taken out and air-cooled to obtain the shaped component; After step (6), the method further comprises: Obtaining a 3D model of the calibrated component; Comparing the correction three-dimensional model with the target profile to obtain a correction deviation comparison result, wherein the correction deviation comparison result includes roundness deviation, distortion deviation and generatrix straightness deviation; When the shape correction deviation comparison result meets the preset deviation condition, the shape-corrected component is a shape correction component with qualified shape correction accuracy; or, When the correction deviation comparison result does not meet the preset deviation condition, the corrected component returns for re-correction; wherein the preset deviation condition includes the roundness deviation being less than a first preset value, the distortion deviation being less than a second preset value, and the busbar straightness deviation being less than a third preset value.

2. The regression creep double-stage aging correction method for thick and thin-walled components according to claim 1 is characterized in that: The step (1) comprises: Obtain the component to be calibrated; querying heat treatment parameters of the component material of the component, wherein the heat treatment parameters include regression temperature; The original yield strength and original elongation of the component material are obtained based on a metal tensile test method.

3. The regression creep double-stage aging correction method for thick and thin-walled components according to claim 2 is characterized in that: In step (2): The method for determining the regression temperature includes: Using the regression temperature in the heat treatment parameters as the regression temperature of the regression heat treatment; The method for determining the creep temperature and the creep time includes: Subjecting the component material to multiple creep tests under a predetermined orthogonal scheme to obtain multiple creep results corresponding to the multiple creep tests, wherein the orthogonal scheme includes multiple creep test temperatures and multiple creep test times corresponding to each creep test temperature, and each creep result includes a creep amount, a creep yield strength, and a creep elongation; Determine the creep temperature and creep time based on a plurality of ratios of the creep yield strength to the original yield strength, a plurality of ratios of the creep elongation to the original elongation, and a plurality of creep amounts, wherein the creep temperature is one of a plurality of creep test temperatures, and the creep time is one of a plurality of creep test times; The method for determining the regression time includes: Processing a plurality of test components made of the component material according to the steps of first regression treatment and then creep treatment to obtain a plurality of processed components, wherein the plurality of test components have the same regression temperature and different regression test times when undergoing regression treatment, and the creep treatment of the plurality of test components all adopts the creep temperature and the creep time in the process parameters of the creep aging correction treatment; Obtaining the processing yield strength and processing elongation of multiple processed components based on the metal tensile test method; An optimal mechanical property group is determined based on the processing yield strength and processing elongation of the plurality of processed components, and the regression experiment time corresponding to the optimal mechanical property group is the regression time.

4. The regression creep double-stage aging correction method for thick and thin-walled components according to any one of claims 1 to 3, characterized in that: The step (3) further includes: Establishing a creep constitutive subprogram based on the creep aging constitutive subprogram of the component material; The simulation of the double-stage aging correction process of the component by using finite element software also includes calling the creep constitutive subroutine.

5. The regression creep double-stage aging correction method for thick and thin-walled components according to claim 1 is characterized in that: After step (6), the method further comprises: Obtaining residual stress values ​​on the inner surface and the outer surface of the component after shape correction; When the absolute values ​​corresponding to the residual stress value of the inner surface and the residual stress value of the outer surface are both smaller than the preset target residual stress, the shaped component is a shaped component with qualified shaped mechanical properties.

6. The regression creep double-stage aging correction method for thick and thin-walled components according to claim 1 is characterized in that: The shape correction mold comprises: A support frame, the support frame comprising a base, and two stoppers arranged on the base in parallel and spaced apart along a first direction; A plurality of bases, wherein the plurality of bases are arranged in parallel and spaced apart on the base along the second direction to form a lattice base, two ends of the bases are respectively fixedly connected to the two stoppers, and each of the bases comprises a plurality of bolt holes arranged at equal intervals; A plurality of first bolts are respectively inserted into the plurality of bolt holes to form a matrix bolt, wherein the length of each first bolt inserted into the bolt hole is adjustable to match different mold profiles.

7. The regression creep double-stage aging correction method for thick and thin-walled components according to claim 6 is characterized in that: The step of obtaining a shape-correcting mold, wherein the profile of the shape-correcting mold is the same as the profile of the mold, comprises: Determining the support frame according to the shape of the component; Determining the lattice height of the lattice bolts according to the mold profile; Adjust the height of each of the first bolts based on the lattice height so that the surface of the lattice bolt forms a profile that is the same as the mold profile; The lattice base is fixedly connected to the support frame.

8. The regression creep double-stage aging correction method for thick and thin-walled components according to claim 1 is characterized in that: The component to be shaped is a component formed by a rolling bending process or a press bending process.

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