Method, device and equipment for obtaining springback value of ship bent plate pressing forming and medium

Abstract

The invention provides a method, a device and equipment for obtaining the springback value of ship bent plate pressing forming and a medium, and relates to the technical field of ship manufacturing. A user can accurately calculate the compression molding springback amount by using the curved plate numerical control compression molding springback amount calculation agent model, the calculation time is shortened, a technological method support is provided for achieving unified control over automatic batch continuous curved plate forming machining of machinery equipment, the ship curved plate forming precision and quality are improved, and the production efficiency is improved. And unified control of business processes such as forming and welding can be well realized.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a method, a device, a computer device and a storage medium for obtaining the springback amount of a ship curved plate formed by press forming. Background Art

[0002] With the rapid development of science and technology, CNC automation equipment has been gradually applied in the shipbuilding business, greatly improving production efficiency and quality level, while also putting forward higher requirements for production process planning. Based on limited data samples, quickly and accurately calculating the deformation parameters of the workpiece during the processing process can effectively improve the production efficiency of equipment, ensure product quality accuracy, improve material utilization, and meet the continuous and smooth production requirements of automation equipment.

[0003] In the process of shipbuilding, the bending plate forming process has gradually adopted CNC equipment to realize automatic forming. The ship bending plate parts are large in size, complex in curved surface shape, and require high forming accuracy. Therefore, the calculation of the springback amount of the ship bending plate forming pressing needs to be fast and accurate while considering many influencing factors. The current patent documents CN115740138A, CN106345860A, and CN104190761A explain and analyze the CNC bending plate forming equipment and forming methods, optimize the forming calculation time, and the forming effect monitoring method. However, these documents do not consider the calculation samples based on the actual limited number of springback amount, and realize the rapid calculation of the springback amount of the bending plate through experimental design. Therefore, it is not suitable for the rapid calculation of the springback amount of the ship bending plate forming, resulting in low precision and quality of the ship bending plate forming, and it is impossible to achieve unified control of the forming, welding and other business processes. Summary of the invention

[0004] The present invention provides a method, device, computer equipment and storage medium for obtaining the springback amount of a ship curved plate formed by pressing, which is used to solve the technical problem that the existing ship curved plate forming business link lacks effective quick calculation of the springback amount of pressing, resulting in low precision and quality of ship curved plate forming, and cannot well realize unified control of business processes such as forming and welding.

[0005] On the one hand, a method for obtaining the springback amount of a ship curved plate press forming process is provided, the method comprising:

[0006] Obtaining curved plate parts for CNC pressing and forming of ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts;

[0007] Selecting a curved plate part test sample according to the element variables of the curved plate part;

[0008] Constructing a finite element analysis model for calculating springback of the forming process according to the curved surface shape, material properties and pressing process parameters of the curved plate part;

[0009] According to the influencing factors of the finite element analysis model for calculating the springback amount of the forming process, a radial basis function is used to fit the functional relationship between the pressing process parameter variables and the springback response value to set the radial basis function, and the coefficient parameters of each component of the radial basis function are determined according to the curved plate part test sample;

[0010] According to the determined radial basis function and its coefficient parameters, the value range of the associated factor variables is defined to form a forming process springback calculation agent model;

[0011] The springback calculation proxy model of the forming process is verified by using the curved plate part test sample, the value range of the factor variable is determined, and the springback calculation proxy model that meets the springback accuracy is obtained;

[0012] The springback calculation result is obtained by inputting the parameters of the curved plate part to be calculated into the springback calculation proxy model.

[0013] In one embodiment, the obtaining of the curved plate parts for CNC pressing and forming of the ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts comprises:

[0014] The curved surface shape information of the curved plate part is provided in the form of an international standard STP file and a point cloud data file;

[0015] The material properties of the curved plate part include elastic modulus, density and yield limit;

[0016] The pressing process parameters of the curved plate part include pressing force, pressing speed and pressing times.

[0017] In one embodiment, selecting a curved plate part test sample according to the element variables of the curved plate part comprises:

[0018] The element variables of the curved plate part include surface type element, curvature radius element, curved plate thickness and curved plate material attribute;

[0019] The surface type elements include saddle-shaped surfaces and sail-shaped surfaces;

[0020] The curvature radius element includes a longitudinal curvature radius and a transverse curvature radius;

[0021] The material property of the curved plate is high-strength steel.

[0022] In one embodiment, after constructing the finite element analysis model for calculating the springback amount of the forming process, the method further includes:

[0023] The forming process springback amount data of all curved plate parts are obtained by constructing the forming process springback amount calculation finite element analysis model, and the forming process springback amount data are recorded.

[0024] In one embodiment, the calculation of the influencing factors of the finite element analysis model according to the springback amount of the forming process and setting the radial basis function by using the radial basis function to fit the functional relationship between the pressing process parameter variables and the springback response value include:

[0025] The radial basis function is set to

[0026] In the formula, c (i) represents the center of the i-th kernel function; n c Represents the number of kernel functions; Represents the distance kernel function, which is calculated by the Euclidean distance from the predicted point of the basis function to the center point; ω j Represents the weight coefficient of the jth kernel function.

[0027] In one embodiment, the step of using the curved plate part test sample to verify the springback calculation proxy model of the forming process, determining the value range of the factor variable, and obtaining the springback calculation proxy model that satisfies the springback accuracy includes:

[0028] The springback calculation proxy model of the forming process is tested by using the curved plate part test sample to determine whether the springback accuracy meets the preset springback accuracy requirement;

[0029] If yes, confirming that the forming process springback amount calculation proxy model is qualified, and using the forming process springback amount calculation proxy model as the springback amount calculation proxy model that meets the springback amount accuracy;

[0030] If not, the curved plate part test sample is adjusted, and the forming process springback calculation proxy model is re-tested using the curved plate part test sample until the springback accuracy of the forming process springback calculation proxy model meets the preset springback accuracy requirement.

[0031] In one embodiment, the step of using the curved plate part test sample to test the springback calculation proxy model of the forming process to determine whether the springback accuracy meets the preset springback accuracy requirement includes:

[0032] Compare the springback amount of the pressing formed calculated by the forming process springback amount calculation agent model with the curved surface shape design data of the curved plate part to determine whether the springback amount of the pressing formed meets the preset springback amount accuracy requirements; wherein the preset springback amount accuracy requirements include lateral forming error, longitudinal forming error and torsional forming error;

[0033] If the springback accuracy meets the preset springback accuracy requirement, the springback distribution point cloud data of the curved plate part is output.

[0034] On the other hand, a device for obtaining the springback amount of a ship curved plate formed by press forming is provided, the device comprising:

[0035] A data acquisition module is used to acquire the curved plate parts of the ship sections subjected to CNC pressing and forming, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts;

[0036] A test sample selection module, used for selecting a test sample of a curved plate part according to the element variables of the curved plate part;

[0037] A finite element analysis model building module is used to build a finite element analysis model for calculating the springback amount of the forming process according to the curved surface shape, material properties and pressing process parameters of the curved plate part;

[0038] A radial basis function construction module is used to calculate the influencing factors of the finite element analysis model according to the springback amount of the forming process, set the radial basis function by using the radial basis function to fit the functional relationship between the pressing process parameter variable and the springback response value, and determine the coefficient parameters of each component of the radial basis function according to the curved plate part test sample;

[0039] A calculation agent model building module is used to define the value range of the associated element variables according to the determined radial basis function and its coefficient parameters, so as to form a calculation agent model for the springback amount of the forming process;

[0040] A calculation agent model verification module is used to verify the springback calculation agent model of the forming process by using the curved plate part test sample, determine the value range of the element variable, and obtain the springback calculation agent model that meets the springback accuracy;

[0041] The module for obtaining springback calculation results is used to input the parameters of the curved plate part to be calculated in the springback calculation proxy model to obtain the springback calculation results.

[0042] In another aspect, a computer device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the following steps are implemented:

[0043] Obtaining curved plate parts for CNC pressing and forming of ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts;

[0044] Selecting a curved plate part test sample according to the element variables of the curved plate part;

[0045] Constructing a finite element analysis model for calculating springback of the forming process according to the curved surface shape, material properties and pressing process parameters of the curved plate part;

[0046] According to the influencing factors of the finite element analysis model for calculating the springback amount of the forming process, a radial basis function is used to fit the functional relationship between the pressing process parameter variables and the springback response value to set the radial basis function, and the coefficient parameters of each component of the radial basis function are determined according to the curved plate part test sample;

[0047] According to the determined radial basis function and its coefficient parameters, the value range of the associated factor variables is defined to form a forming process springback calculation agent model;

[0048] The springback calculation proxy model of the forming process is verified by using the curved plate part test sample, the value range of the factor variable is determined, and the springback calculation proxy model that meets the springback accuracy is obtained;

[0049] The springback calculation result is obtained by inputting the parameters of the curved plate part to be calculated into the springback calculation proxy model.

[0050] In another aspect, 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:

[0051] Obtaining curved plate parts for CNC pressing and forming of ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts;

[0052] Selecting a curved plate part test sample according to the element variables of the curved plate part;

[0053] Constructing a finite element analysis model for calculating springback of the forming process according to the curved surface shape, material properties and pressing process parameters of the curved plate part;

[0054] According to the influencing factors of the finite element analysis model for calculating the springback amount of the forming process, a radial basis function is used to fit the functional relationship between the pressing process parameter variables and the springback response value to set the radial basis function, and the coefficient parameters of each component of the radial basis function are determined according to the curved plate part test sample;

[0055] According to the determined radial basis function and its coefficient parameters, the value range of the associated factor variables is defined to form a forming process springback calculation agent model;

[0056] The springback calculation proxy model of the forming process is verified by using the curved plate part test sample, the value range of the factor variable is determined, and the springback calculation proxy model that meets the springback accuracy is obtained;

[0057] The springback calculation result is obtained by inputting the parameters of the curved plate part to be calculated into the springback calculation proxy model.

[0058] Compared with the existing technology, the above-mentioned method, device, computer equipment and storage medium for obtaining the springback amount of the ship curved plate pressed and formed can enable users to accurately calculate the springback amount of the pressed forming by using the springback amount calculation agent model of the curved plate CNC pressed, thereby reducing the calculation time, providing process method support for realizing the unified control of the automated batch continuous curved plate forming processing of machines and equipment, improving the precision and quality of the ship curved plate forming, and can well realize the unified control of business processes such as forming and welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 This is an application environment diagram of a method for obtaining the springback amount of a ship curved plate formed by pressing in one embodiment of the present application;

[0060] Figure 2 This is a flow chart of a method for obtaining the springback amount of a ship curved plate during press forming in one embodiment of the present application;

[0061] Figure 3 This is a judgment logic diagram of a method for obtaining the springback amount of a ship curved plate formed by pressing in one embodiment of the present application;

[0062] Figure 4 This is a structural block diagram of a device for obtaining the springback amount of a ship curved plate formed by pressing in one embodiment of the present application;

[0063] Figure 5 This is a diagram of the internal structure of a computer device in one embodiment of the present application. DETAILED DESCRIPTION

[0064] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] The method for obtaining the springback amount of a ship curved plate formed by pressing provided in this application can be applied to Figure 1 In the application environment shown. Figure 1 The figure is a schematic diagram of the data flow of ship curved plate forming. The curved plate forming process design terminal is connected to the curved plate forming springback rapid calculation server through a grid. The curved plate forming springback rapid calculation server generates a forming process instruction and sends the instruction file to the CNC forming station. The CNC forming station includes press forming and surface measurement. The surface point cloud measured by the CNC forming station is summarized as status information and reported to the curved plate forming springback rapid calculation server. The CNC forming station transmits the qualified ship curved plate to the subsequent process station.

[0066] like Figure 2 , Figure 3As shown, a method for obtaining the springback amount of a ship curved plate press forming process is provided, comprising the following steps:

[0067] Step S1, obtaining a curved plate part to be subjected to CNC pressing and forming processing in ship sections, as well as a curved surface shape, material properties and pressing process parameters of the curved plate part;

[0068] Step S2, selecting a curved plate part test sample according to the element variables of the curved plate part;

[0069] Step S3, constructing a finite element analysis model for calculating springback of the forming process according to the curved surface shape, material properties and pressing process parameters of the curved plate part;

[0070] Step S4, according to the influencing factors of the finite element analysis model of the forming process springback calculation, the radial basis function is used to fit the functional relationship between the pressing process parameter variables and the springback response value to set the radial basis function, and the coefficient parameters of each component of the radial basis function are determined according to the curved plate part test sample;

[0071] Step S5, defining the value range of the associated factor variables according to the determined radial basis function and its coefficient parameters, and forming a forming process springback calculation agent model;

[0072] Step S6, using the curved plate part test sample to verify the springback calculation proxy model of the forming process, determining the value range of the factor variable, and obtaining the springback calculation proxy model that meets the springback accuracy;

[0073] Step S7, inputting the parameters of the curved plate part to be calculated into the springback calculation agent model to obtain the springback calculation result.

[0074] Preferably, the rebound amount rapid calculation result is output in the form of point cloud data.

[0075] Among them, by using the springback calculation agent model for CNC pressing of curved plates, users can accurately calculate the springback amount of pressed forming, reduce calculation time, provide process method support for realizing unified control of automated batch continuous curved plate forming processing of machinery and equipment, improve the precision and quality of ship curved plate forming, and can well realize unified control of forming, welding and other business processes.

[0076] In this embodiment, the acquisition of the curved plate parts for CNC pressing and forming of the ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts include:

[0077] The curved surface shape information of the curved plate part is provided in the form of an international standard STP file and a point cloud data file;

[0078] The material properties of the curved plate part include elastic modulus, density and yield limit;

[0079] The pressing process parameters of the curved plate part include pressing force, pressing speed and pressing times.

[0080] Among them, the international standard STP file is ISO AP203 / 214 format file. The pressing times are 1 to 4 times. The pressing force is 10KN to 30KN.

[0081] In this embodiment, selecting a curved plate part test sample according to the element variables of the curved plate part includes:

[0082] The element variables of the curved plate part include surface type element, curvature radius element, curved plate thickness and curved plate material attribute;

[0083] The surface type elements include saddle-shaped surfaces and sail-shaped surfaces;

[0084] The curvature radius element includes a longitudinal curvature radius and a transverse curvature radius;

[0085] The material property of the curved plate is high-strength steel.

[0086] In this embodiment, after constructing the forming process springback calculation finite element analysis model, the method further includes:

[0087] The forming process springback amount data of all curved plate parts are obtained by constructing the forming process springback amount calculation finite element analysis model, and the forming process springback amount data are recorded.

[0088] In this embodiment, the calculation of the influencing factors of the finite element analysis model according to the springback amount of the forming process and setting the radial basis function by using the radial basis function to fit the functional relationship between the pressing process parameter variables and the springback response value include:

[0089] The radial basis function is set to

[0090] In the formula, c (i) represents the center of the i-th kernel function; n c Represents the number of kernel functions; Represents the distance kernel function, which is calculated by the Euclidean distance from the predicted point of the basis function to the center point; ω j Represents the weight coefficient of the jth kernel function.

[0091] Among them, the value range of the element variable is defined according to the determined radial basis function and its coefficient parameters, including: defining the longitudinal curvature radius as 1000mm to 4000mm, the transverse curvature radius as 1000mm to 4000mm; defining the thickness of the curved plate as 5mm to 35mm.

[0092] In this embodiment, the springback calculation proxy model of the forming process is verified by using the curved plate part test sample, and the value range of the factor variable is determined to obtain the springback calculation proxy model that meets the springback accuracy, including:

[0093] The springback calculation proxy model of the forming process is tested by using the curved plate part test sample to determine whether the springback accuracy meets the preset springback accuracy requirement;

[0094] If yes, confirming that the forming process springback amount calculation proxy model is qualified, and using the forming process springback amount calculation proxy model as the springback amount calculation proxy model that meets the springback amount accuracy;

[0095] If not, the curved plate part test sample is adjusted, and the forming process springback calculation proxy model is re-tested using the curved plate part test sample until the springback accuracy of the forming process springback calculation proxy model meets the preset springback accuracy requirement.

[0096] In this embodiment, the use of the curved plate part test sample to test the forming process springback calculation proxy model to determine whether the springback accuracy meets the preset springback accuracy requirement includes:

[0097] Compare the springback amount of the pressing formed calculated by the forming process springback amount calculation agent model with the curved surface shape design data of the curved plate part to determine whether the springback amount of the pressing formed meets the preset springback amount accuracy requirements; wherein the preset springback amount accuracy requirements include lateral forming error, longitudinal forming error and torsional forming error;

[0098] If the springback accuracy meets the preset springback accuracy requirement, the springback distribution point cloud data of the curved plate part is output.

[0099] In the above-mentioned method for obtaining the springback amount of the ship curved plate pressed and formed, the user can accurately calculate the springback amount of the pressed forming by using the springback amount calculation agent model of the curved plate CNC pressed, reduce the calculation time, and provide process method support for realizing the unified control of the automated batch continuous curved plate forming processing of the machine equipment, improve the precision and quality of the ship curved plate forming, and can well realize the unified control of the forming, welding and other business processes.

[0100] Compared with the prior art, the present invention has the following beneficial effects:

[0101] 1. The present invention adopts a radial basis function proxy model method to calculate the springback amount of a curved plate part forming process, thereby improving the efficiency and quality of the springback amount calculation of the curved plate part forming process.

[0102] 2. The problem of rapid calculation of the springback amount of ship curved plate forming is a complex finite element calculation problem. The present invention adopts an improved proxy model algorithm to obtain a near-optimal solution, effectively avoiding the problem of large-scale calculation.

[0103] 3. The present invention adopts an improved proxy model algorithm to achieve unified control of the curved plate forming process, improve the overall processing efficiency of the forming process, improve economic benefits, and enhance the competitiveness of the enterprise.

[0104] In one embodiment, Figure 4 As shown, a device 10 for obtaining the springback amount of a ship curved plate press forming process is provided, comprising: a data acquisition module 1, a test sample selection module 2, a finite element analysis model construction module 3, a radial basis function construction module 4, a computational proxy model construction module 5, a computational proxy model verification module 6 and a module 7 for obtaining springback calculation results.

[0105] The data acquisition module 1 is used to acquire the curved plate parts of the ship sections subjected to CNC pressing and forming, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts.

[0106] The test sample selection module 2 is used to select the curved plate part test sample according to the element variables of the curved plate part.

[0107] The finite element analysis model building module 3 is used to build a finite element analysis model for calculating the springback amount of the forming process according to the curved surface shape, material properties and pressing process parameters of the curved plate part.

[0108] The radial basis function construction module 4 is used to calculate the influencing factors of the finite element analysis model according to the springback amount of the forming process, set the radial basis function by using the radial basis function to fit the functional relationship between the pressing process parameter variables and the springback response value, and determine the coefficient parameters of each component of the radial basis function according to the curved plate part test sample.

[0109] The calculation agent model building module 5 is used to define the value range of the associated element variables according to the determined radial basis function and its coefficient parameters, so as to form a calculation agent model for the springback amount of the forming process.

[0110] The calculation agent model verification module 6 is used to verify the springback calculation agent model of the forming process by using the curved plate part test sample, determine the value range of the element variable, and obtain the springback calculation agent model that meets the springback accuracy;

[0111] The springback calculation result obtaining module 7 is used to input the parameters of the curved plate part to be calculated in the springback calculation proxy model to obtain the springback calculation result.

[0112] In this embodiment, the acquisition of the curved plate parts for CNC pressing and forming of the ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts include:

[0113] The curved surface shape information of the curved plate part is provided in the form of an international standard STP file and a point cloud data file;

[0114] The material properties of the curved plate part include elastic modulus, density and yield limit;

[0115] The pressing process parameters of the curved plate part include pressing force, pressing speed and pressing times.

[0116] In this embodiment, selecting a curved plate part test sample according to the element variables of the curved plate part includes:

[0117] The element variables of the curved plate part include surface type element, curvature radius element, curved plate thickness and curved plate material attribute;

[0118] The surface type elements include saddle-shaped surfaces and sail-shaped surfaces;

[0119] The curvature radius element includes a longitudinal curvature radius and a transverse curvature radius;

[0120] The material property of the curved plate is high-strength steel.

[0121] In this embodiment, after constructing the forming process springback calculation finite element analysis model, the method further includes:

[0122] The forming process springback amount data of all curved plate parts are obtained by constructing the forming process springback amount calculation finite element analysis model, and the forming process springback amount data are recorded.

[0123] In this embodiment, the calculation of the influencing factors of the finite element analysis model according to the springback amount of the forming process and setting the radial basis function by using the radial basis function to fit the functional relationship between the pressing process parameter variables and the springback response value include:

[0124] The radial basis function is set to

[0125] In the formula, c (i) represents the center of the i-th kernel function; n c Represents the number of kernel functions; Represents the distance kernel function, which is calculated by the Euclidean distance from the predicted point of the basis function to the center point; ω j Represents the weight coefficient of the jth kernel function.

[0126] In this embodiment, the springback calculation proxy model of the forming process is verified by using the curved plate part test sample, and the value range of the factor variable is determined to obtain the springback calculation proxy model that meets the springback accuracy, including:

[0127] The springback calculation proxy model of the forming process is tested by using the curved plate part test sample to determine whether the springback accuracy meets the preset springback accuracy requirement;

[0128] If yes, confirming that the forming process springback amount calculation proxy model is qualified, and using the forming process springback amount calculation proxy model as the springback amount calculation proxy model that meets the springback amount accuracy;

[0129] If not, the curved plate part test sample is adjusted, and the forming process springback calculation proxy model is re-tested using the curved plate part test sample until the springback accuracy of the forming process springback calculation proxy model meets the preset springback accuracy requirement.

[0130] In this embodiment, the use of the curved plate part test sample to test the forming process springback calculation proxy model to determine whether the springback accuracy meets the preset springback accuracy requirement includes:

[0131] Compare the springback amount of the pressing formed calculated by the forming process springback amount calculation agent model with the curved surface shape design data of the curved plate part to determine whether the springback amount of the pressing formed meets the preset springback amount accuracy requirements; wherein the preset springback amount accuracy requirements include lateral forming error, longitudinal forming error and torsional forming error;

[0132] If the springback accuracy meets the preset springback accuracy requirement, the springback distribution point cloud data of the curved plate part is output.

[0133] In the above-mentioned ship curved plate press forming springback amount acquisition device, the user can accurately calculate the press forming springback amount by using the curved plate CNC pressing into the springback amount calculation agent model, reduce the calculation time, and provide process method support for realizing the unified control of the automated batch continuous curved plate forming processing of the machine equipment, thereby improving the precision and quality of the ship curved plate forming, and can well realize the unified control of the forming, welding and other business processes.

[0134] The specific definition of the device for obtaining the springback amount of a ship curved plate by press forming can be found in the above definition of the method for obtaining the springback amount of a ship curved plate by press forming, which will not be repeated here. Each module in the above-mentioned device for obtaining the springback amount of a ship curved plate by press forming can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0135] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0136] Obtaining curved plate parts for CNC pressing and forming of ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts;

[0137] Selecting a curved plate part test sample according to the element variables of the curved plate part;

[0138] Constructing a finite element analysis model for calculating springback of the forming process according to the curved surface shape, material properties and pressing process parameters of the curved plate part;

[0139] According to the influencing factors of the finite element analysis model for calculating the springback amount of the forming process, a radial basis function is used to fit the functional relationship between the pressing process parameter variables and the springback response value to set the radial basis function, and the coefficient parameters of each component of the radial basis function are determined according to the curved plate part test sample;

[0140] According to the determined radial basis function and its coefficient parameters, the value range of the associated factor variables is defined to form a forming process springback calculation agent model;

[0141] The springback calculation proxy model of the forming process is verified by using the curved plate part test sample, the value range of the factor variable is determined, and the springback calculation proxy model that meets the springback accuracy is obtained;

[0142] The springback calculation result is obtained by inputting the parameters of the curved plate part to be calculated into the springback calculation proxy model.

[0143] In one embodiment, the computer program further implements the following steps when executed by a processor:

[0144] The method of obtaining the curved plate parts for CNC pressing and forming of the ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts includes:

[0145] The curved surface shape information of the curved plate part is provided in the form of an international standard STP file and a point cloud data file;

[0146] The material properties of the curved plate part include elastic modulus, density and yield limit;

[0147] The pressing process parameters of the curved plate part include pressing force, pressing speed and pressing times.

[0148] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0149] The step of selecting a curved plate part test sample according to the element variables of the curved plate part comprises:

[0150] The element variables of the curved plate part include surface type element, curvature radius element, curved plate thickness and curved plate material attribute;

[0151] The surface type elements include saddle-shaped surfaces and sail-shaped surfaces;

[0152] The curvature radius element includes a longitudinal curvature radius and a transverse curvature radius;

[0153] The material property of the curved plate is high-strength steel.

[0154] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0155] After constructing the finite element analysis model for calculating the springback amount of the forming process, the method further includes:

[0156] The forming process springback amount data of all curved plate parts are obtained by constructing the forming process springback amount calculation finite element analysis model, and the forming process springback amount data are recorded.

[0157] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0158] The calculation of the influencing factors of the finite element analysis model according to the springback amount of the forming process and setting the radial basis function by using the radial basis function to fit the functional relationship between the pressing process parameter variables and the springback response value include:

[0159] The radial basis function is set to

[0160] In the formula, c (i) represents the center of the i-th kernel function; n c Represents the number of kernel functions; Represents the distance kernel function, which is calculated by the Euclidean distance from the predicted point of the basis function to the center point; ω j Represents the weight coefficient of the jth kernel function.

[0161] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0162] The method of using the curved plate part test sample to verify the springback calculation proxy model of the forming process, determining the value range of the factor variable, and obtaining the springback calculation proxy model that meets the springback accuracy includes:

[0163] The springback calculation proxy model of the forming process is tested by using the curved plate part test sample to determine whether the springback accuracy meets the preset springback accuracy requirement;

[0164] If yes, confirming that the forming process springback amount calculation proxy model is qualified, and using the forming process springback amount calculation proxy model as the springback amount calculation proxy model that meets the springback amount accuracy;

[0165] If not, the curved plate part test sample is adjusted, and the forming process springback calculation proxy model is re-tested using the curved plate part test sample until the springback accuracy of the forming process springback calculation proxy model meets the preset springback accuracy requirement.

[0166] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0167] The testing of the forming process springback calculation proxy model using the curved plate part test sample to determine whether the springback accuracy meets the preset springback accuracy requirement includes:

[0168] Compare the springback amount of the pressing formed calculated by the forming process springback amount calculation agent model with the curved surface shape design data of the curved plate part to determine whether the springback amount of the pressing formed meets the preset springback amount accuracy requirements; wherein the preset springback amount accuracy requirements include lateral forming error, longitudinal forming error and torsional forming error;

[0169] If the springback accuracy meets the preset springback accuracy requirement, the springback distribution point cloud data of the curved plate part is output.

[0170] For the specific limitations on the steps implemented when the computer program is executed by the processor, please refer to the above limitations on the method for obtaining the springback amount of the ship curved plate press forming, which will not be repeated here.

[0171] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 5 As shown. The computer device includes a processor, a memory, a network interface and a database connected through a system bus. Among them, 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, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data on the springback amount of a ship curved plate pressed and formed. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for obtaining the springback amount of a ship curved plate pressed and formed is implemented.

[0172] Those skilled in the art will understand that Figure 5The 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.

[0173] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the following steps when executing the computer program:

[0174] Obtaining curved plate parts for CNC pressing and forming of ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts;

[0175] Selecting a curved plate part test sample according to the element variables of the curved plate part;

[0176] Constructing a finite element analysis model for calculating springback of the forming process according to the curved surface shape, material properties and pressing process parameters of the curved plate part;

[0177] According to the influencing factors of the finite element analysis model for calculating the springback amount of the forming process, a radial basis function is used to fit the functional relationship between the pressing process parameter variables and the springback response value to set the radial basis function, and the coefficient parameters of each component of the radial basis function are determined according to the curved plate part test sample;

[0178] According to the determined radial basis function and its coefficient parameters, the value range of the associated factor variables is defined to form a forming process springback calculation agent model;

[0179] The springback calculation proxy model of the forming process is verified by using the curved plate part test sample, the value range of the factor variable is determined, and the springback calculation proxy model that meets the springback accuracy is obtained;

[0180] The springback calculation result is obtained by inputting the parameters of the curved plate part to be calculated into the springback calculation proxy model.

[0181] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0182] The method of obtaining the curved plate parts for CNC pressing and forming of the ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts includes:

[0183] The curved surface shape information of the curved plate part is provided in the form of an international standard STP file and a point cloud data file;

[0184] The material properties of the curved plate part include elastic modulus, density and yield limit;

[0185] The pressing process parameters of the curved plate part include pressing force, pressing speed and pressing times.

[0186] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0187] The step of selecting a curved plate part test sample according to the element variables of the curved plate part comprises:

[0188] The element variables of the curved plate part include surface type element, curvature radius element, curved plate thickness and curved plate material attribute;

[0189] The surface type elements include saddle-shaped surfaces and sail-shaped surfaces;

[0190] The curvature radius element includes a longitudinal curvature radius and a transverse curvature radius;

[0191] The material property of the curved plate is high-strength steel.

[0192] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0193] After constructing the finite element analysis model for calculating the springback amount of the forming process, the method further includes:

[0194] The forming process springback amount data of all curved plate parts are obtained by constructing the forming process springback amount calculation finite element analysis model, and the forming process springback amount data are recorded.

[0195] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0196] The calculation of the influencing factors of the finite element analysis model according to the springback amount of the forming process and setting the radial basis function by using the radial basis function to fit the functional relationship between the pressing process parameter variables and the springback response value include:

[0197] The radial basis function is set to

[0198] In the formula, c (i) represents the center of the i-th kernel function; n c Represents the number of kernel functions; Represents the distance kernel function, which is calculated by the Euclidean distance from the predicted point of the basis function to the center point; ω j Represents the weight coefficient of the jth kernel function.

[0199] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0200] The method of using the curved plate part test sample to verify the springback calculation proxy model of the forming process, determining the value range of the factor variable, and obtaining the springback calculation proxy model that meets the springback accuracy includes:

[0201] The springback calculation proxy model of the forming process is tested by using the curved plate part test sample to determine whether the springback accuracy meets the preset springback accuracy requirement;

[0202] If yes, confirming that the forming process springback amount calculation proxy model is qualified, and using the forming process springback amount calculation proxy model as the springback amount calculation proxy model that meets the springback amount accuracy;

[0203] If not, the curved plate part test sample is adjusted, and the forming process springback calculation proxy model is re-tested using the curved plate part test sample until the springback accuracy of the forming process springback calculation proxy model meets the preset springback accuracy requirement.

[0204] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0205] The testing of the forming process springback calculation proxy model using the curved plate part test sample to determine whether the springback accuracy meets the preset springback accuracy requirement includes:

[0206] Compare the springback amount of the pressing formed calculated by the forming process springback amount calculation agent model with the curved surface shape design data of the curved plate part to determine whether the springback amount of the pressing formed meets the preset springback amount accuracy requirements; wherein the preset springback amount accuracy requirements include lateral forming error, longitudinal forming error and torsional forming error;

[0207] If the springback accuracy meets the preset springback accuracy requirement, the springback distribution point cloud data of the curved plate part is output.

[0208] For the specific limitations on the steps implemented when the processor executes the computer program, please refer to the above limitations on the method for obtaining the springback amount of the ship curved plate press forming, which will not be repeated here.

[0209] 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:

[0210] Obtaining curved plate parts for CNC pressing and forming of ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts;

[0211] Selecting a curved plate part test sample according to the element variables of the curved plate part;

[0212] Constructing a finite element analysis model for calculating springback of the forming process according to the curved surface shape, material properties and pressing process parameters of the curved plate part;

[0213] According to the influencing factors of the finite element analysis model for calculating the springback amount of the forming process, a radial basis function is used to fit the functional relationship between the pressing process parameter variables and the springback response value to set the radial basis function, and the coefficient parameters of each component of the radial basis function are determined according to the curved plate part test sample;

[0214] According to the determined radial basis function and its coefficient parameters, the value range of the associated factor variables is defined to form a forming process springback calculation agent model;

[0215] The springback calculation proxy model of the forming process is verified by using the curved plate part test sample, the value range of the factor variable is determined, and the springback calculation proxy model that meets the springback accuracy is obtained;

[0216] The springback calculation result is obtained by inputting the parameters of the curved plate part to be calculated into the springback calculation proxy model.

[0217] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0218] The method of obtaining the curved plate parts for CNC pressing and forming of the ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts includes:

[0219] The curved surface shape information of the curved plate part is provided in the form of an international standard STP file and a point cloud data file;

[0220] The material properties of the curved plate part include elastic modulus, density and yield limit;

[0221] The pressing process parameters of the curved plate part include pressing force, pressing speed and pressing times.

[0222] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0223] The step of selecting a curved plate part test sample according to the element variables of the curved plate part comprises:

[0224] The element variables of the curved plate part include surface type element, curvature radius element, curved plate thickness and curved plate material attribute;

[0225] The surface type elements include saddle-shaped surfaces and sail-shaped surfaces;

[0226] The curvature radius element includes a longitudinal curvature radius and a transverse curvature radius;

[0227] The material property of the curved plate is high-strength steel.

[0228] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0229] After constructing the finite element analysis model for calculating the springback amount of the forming process, the method further includes:

[0230] The forming process springback amount data of all curved plate parts are obtained by constructing the forming process springback amount calculation finite element analysis model, and the forming process springback amount data are recorded.

[0231] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0232] The calculation of the influencing factors of the finite element analysis model according to the springback amount of the forming process and setting the radial basis function by using the radial basis function to fit the functional relationship between the pressing process parameter variables and the springback response value include:

[0233] The radial basis function is set to

[0234] In the formula, c (i) represents the center of the i-th kernel function; n c Represents the number of kernel functions; Represents the distance kernel function, which is calculated by the Euclidean distance from the predicted point of the basis function to the center point; ω j Represents the weight coefficient of the jth kernel function.

[0235] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0236] The method of using the curved plate part test sample to verify the springback calculation proxy model of the forming process, determining the value range of the factor variable, and obtaining the springback calculation proxy model that meets the springback accuracy includes:

[0237] The springback calculation proxy model of the forming process is tested by using the curved plate part test sample to determine whether the springback accuracy meets the preset springback accuracy requirement;

[0238] If yes, confirming that the forming process springback amount calculation proxy model is qualified, and using the forming process springback amount calculation proxy model as the springback amount calculation proxy model that meets the springback amount accuracy;

[0239] If not, the curved plate part test sample is adjusted, and the forming process springback calculation proxy model is re-tested using the curved plate part test sample until the springback accuracy of the forming process springback calculation proxy model meets the preset springback accuracy requirement.

[0240] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0241] The testing of the forming process springback calculation proxy model using the curved plate part test sample to determine whether the springback accuracy meets the preset springback accuracy requirement includes:

[0242] Compare the springback amount of the pressing formed calculated by the forming process springback amount calculation agent model with the curved surface shape design data of the curved plate part to determine whether the springback amount of the pressing formed meets the preset springback amount accuracy requirements; wherein the preset springback amount accuracy requirements include lateral forming error, longitudinal forming error and torsional forming error;

[0243] If the springback accuracy meets the preset springback accuracy requirement, the springback distribution point cloud data of the curved plate part is output.

[0244] For the specific limitations on the steps implemented when the computer program is executed by the processor, please refer to the above limitations on the method for obtaining the springback amount of the ship curved plate press forming, which will not be repeated here.

[0245] Those skilled 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 memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0246] Finally, it should be noted that the above functions are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.

Claims

1. A method for obtaining the springback amount of a ship curved plate during press forming. It is characterized in that include: Obtaining curved plate parts for CNC pressing and forming of ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts; Selecting a curved plate part test sample according to the element variables of the curved plate part; Constructing a finite element analysis model for calculating springback of the forming process according to the curved surface shape, material properties and pressing process parameters of the curved plate part; According to the influencing factors of the finite element analysis model for calculating the springback amount of the forming process, a radial basis function is used to fit the functional relationship between the pressing process parameter variables and the springback response value to set the radial basis function, and the coefficient parameters of each component of the radial basis function are determined according to the curved plate part test sample; According to the determined radial basis function and its coefficient parameters, the value range of the associated factor variables is defined to form a forming process springback calculation agent model; The springback calculation proxy model of the forming process is verified by using the curved plate part test sample, the value range of the factor variable is determined, and the springback calculation proxy model that meets the springback accuracy is obtained; The springback calculation result is obtained by inputting the parameters of the curved plate part to be calculated into the springback calculation proxy model.

2. The method for obtaining the springback amount of a ship curved plate press forming according to claim 1, It is characterized in that The method of obtaining the curved plate parts for CNC pressing and forming of the ship sections, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts includes: The curved surface shape information of the curved plate part is provided in the form of an international standard STP file and a point cloud data file; The material properties of the curved plate part include elastic modulus, density and yield limit; The pressing process parameters of the curved plate part include pressing force, pressing speed and pressing times.

3. The method for obtaining the springback amount of a ship curved plate press forming according to claim 1, It is characterized in that The step of selecting a curved plate part test sample according to the element variables of the curved plate part comprises: The element variables of the curved plate part include surface type element, curvature radius element, curved plate thickness and curved plate material attribute; The surface type elements include saddle-shaped surfaces and sail-shaped surfaces; The curvature radius element includes a longitudinal curvature radius and a transverse curvature radius; The material property of the curved plate is high-strength steel.

4. The method for obtaining the springback amount of a ship curved plate press forming according to claim 1, It is characterized in that After constructing the finite element analysis model for calculating the springback amount of the forming process, the method further includes: The forming process springback amount data of all curved plate parts are obtained by constructing the forming process springback amount calculation finite element analysis model, and the forming process springback amount data are recorded.

5. The method for obtaining the springback amount of a ship curved plate press forming according to claim 1, It is characterized in that The calculation of the influencing factors of the finite element analysis model according to the springback amount of the forming process and setting the radial basis function by using the radial basis function to fit the functional relationship between the pressing process parameter variables and the springback response value include: The radial basis function is set to In the formula, c (i) represents the center of the i-th kernel function; n c Represents the number of kernel functions; Represents the distance kernel function, which is calculated by the Euclidean distance from the predicted point of the basis function to the center point; ω j Represents the weight coefficient of the jth kernel function.

6. The method for obtaining the springback amount of a ship curved plate press forming according to claim 1, It is characterized in that The method of using the curved plate part test sample to verify the springback calculation proxy model of the forming process, determining the value range of the factor variable, and obtaining the springback calculation proxy model that meets the springback accuracy includes: The springback calculation proxy model of the forming process is tested by using the curved plate part test sample to determine whether the springback accuracy meets the preset springback accuracy requirement; If yes, confirming that the forming process springback amount calculation proxy model is qualified, and using the forming process springback amount calculation proxy model as the springback amount calculation proxy model that meets the springback amount accuracy; If not, the curved plate part test sample is adjusted, and the forming process springback calculation proxy model is re-tested using the curved plate part test sample until the springback accuracy of the forming process springback calculation proxy model meets the preset springback accuracy requirement.

7. The method for obtaining the springback amount of a ship curved plate press forming according to claim 6, It is characterized in that The testing of the forming process springback calculation proxy model using the curved plate part test sample to determine whether the springback accuracy meets the preset springback accuracy requirement includes: Compare the springback amount of the pressing formed calculated by the forming process springback amount calculation agent model with the curved surface shape design data of the curved plate part to determine whether the springback amount of the pressing formed meets the preset springback amount accuracy requirements; wherein the preset springback amount accuracy requirements include lateral forming error, longitudinal forming error and torsional forming error; If the springback accuracy meets the preset springback accuracy requirement, the springback distribution point cloud data of the curved plate part is output.

8. A device for obtaining the springback amount of a ship curved plate pressed and formed, It is characterized in that The device comprises: A data acquisition module is used to acquire the curved plate parts of the ship sections subjected to CNC pressing and forming, as well as the curved surface shape, material properties and pressing process parameters of the curved plate parts; A test sample selection module is used to select a test sample of a curved plate part according to the element variables of the curved plate part; a finite element analysis model construction module is used to construct a finite element analysis model for calculating the springback amount of the forming process according to the curved surface shape, material properties and pressing process parameters of the curved plate part; A radial basis function construction module is used to calculate the influencing factors of the finite element analysis model according to the springback amount of the forming process, set the radial basis function by using the radial basis function to fit the functional relationship between the pressing process parameter variable and the springback response value, and determine the coefficient parameters of each component of the radial basis function according to the curved plate part test sample; A calculation agent model building module is used to define the value range of the associated element variables according to the determined radial basis function and its coefficient parameters, so as to form a calculation agent model for the springback amount of the forming process; A calculation agent model verification module is used to verify the springback calculation agent model of the forming process by using the curved plate part test sample, determine the value range of the element variable, and obtain the springback calculation agent model that meets the springback accuracy; The module for obtaining springback calculation results is used to input the parameters of the curved plate part to be calculated in the springback calculation proxy model to obtain the springback calculation results.

9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, It is characterized in that When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, It is 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 7 are implemented.

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