CN-121997607-A - Abnormal plate stamping die resetting process simulation method and system combined with data modeling

Abstract

The invention provides a method and a system for simulating a resetting process of a deformed plate stamping die by combining data modeling, which relate to the technical field of computer modeling, and are characterized in that firstly, a deformed plate resetting dynamic topological model is constructed based on deformed plate three-dimensional form data and die resetting part motion characteristic data, and a contact area and an acting force transmission path are associated through topological nodes; the method comprises the steps of acquiring morphological deformation data and die resetting force real-time data in a resetting process to generate a morphological force coupling data chain, inputting the morphological force coupling data chain into a deformed plate resetting dynamic topology model to drive a topology node to dynamically reorganize to generate topology reorganization data, generating dynamic adaptation resetting path data based on the topology reorganization data, and finally inputting the dynamic adaptation resetting path data into the deformed plate resetting dynamic topology model reversely to carry out iterative optimization to generate simulated complete data. The invention can accurately simulate the resetting process of the stamping die of the abnormal plate, and improve the accuracy and reliability of simulation.

Inventors

• ZHANG YU
• XU QINGSONG
• LUO HAO

Assignees

• 成都巨发汽车零部件有限公司

Dates

Publication Date

20260508

Application Date

20260202

Claims (10)

1. 1. The method for simulating the resetting process of the stamping die of the irregular plate by combining data modeling is characterized by comprising the following steps of: constructing a deformed plate reset dynamic topology model based on the deformed plate three-dimensional form data and the movement characteristic data of the die reset part, wherein the deformed plate reset dynamic topology model associates a deformed plate contact area with a die reset acting force transmission path through a topology node; acquiring form deformation data and die reset force real-time data in the resetting process of the deformed plate, and generating a form force coupling data chain, wherein the form force coupling data chain records synchronous change information of deformation of each contact area of the deformed plate and corresponding reset force; inputting the morphological force coupling data chain into a deformed plate reset dynamic topology model, driving the deformed plate reset dynamic topology model to dynamically reorganize topological nodes, and generating topological reorganization data, wherein the topological reorganization data reflects the node connection relation between deformed plates and the reset force after being adapted; Generating dynamic adaptive reset path data based on topology recombination data, wherein the dynamic adaptive reset path data comprises a motion track and a motion time sequence of each component of the die after adjustment according to the topology node relation; and reversely inputting the dynamic adaptive reset path data into the abnormal plate reset dynamic topology model, iteratively optimizing the association strength of the topology nodes and the reset force transfer coefficient, and generating the simulated complete data after iterative optimization.
2. 2. The method for simulating the resetting process of the stamping die for the abnormal plate combined with the data modeling according to claim 1, wherein the constructing the dynamic topological model for resetting the abnormal plate based on the three-dimensional morphological data of the abnormal plate and the motion characteristic data of the die resetting component comprises the following steps: acquiring three-dimensional contour data, thickness distribution data and material elasticity data of the irregular plate, and generating three-dimensional shape data of the irregular plate by a three-dimensional modeling technology, wherein the three-dimensional shape data of the irregular plate are used for showing the spatial structure and physical parameters of the irregular plate; Collecting movement stroke data, rotation angle data and component surface contact parameter data of each reset component of the die to form movement characteristic data of the reset component of the die, wherein the movement characteristic data of the reset component of the die are used for reflecting movement capacity and contact parameter information of the reset component; extracting convex area data, concave area data and edge contour data in the three-dimensional shape data of the irregular plate, determining the surface areas of the irregular plate corresponding to the convex area data, the concave area data and the edge contour data in the three-dimensional shape data of the irregular plate as topological node candidate areas, wherein each topological node candidate area corresponds to a key position where the irregular plate is possibly contacted with a die; extracting component contact end face data, movement direction data and acting force output data in the movement characteristic data of the die resetting component, determining component acting areas corresponding to the component contact end face data, the movement direction data and the acting force output data in the movement characteristic data of the die resetting component as topological node matching areas, wherein each topological node matching area corresponds to a key position where the die possibly applies resetting force; Establishing an initial association relation between a topological node candidate region and a topological node matching region, and distributing initial association weights according to the coincidence ratio of the space position of the deformed plate and the movement track of the die to form an initial topological association matrix; Based on the initial topology association matrix, defining each topology node candidate area and a corresponding topology node matching area as basic topology nodes of the deformed plate reset dynamic topology model, wherein each basic topology node comprises a space coordinate parameter and an initial association weight parameter; Constructing a force transmission path model between foundation topological nodes, setting a path transmission coefficient according to the elasticity data of the deformed plate material and the contact parameter data of the mold part, and directly associating the path transmission coefficient with the acting force transmission efficiency of the adjacent foundation topological nodes; Integrating the basic topology nodes, the initial topology incidence matrix and the force transmission path model to form a core structure of the abnormal plate reset dynamic topology model, wherein the core structure of the abnormal plate reset dynamic topology model is used for defining node composition and incidence rules; Inputting material elasticity parameters in the three-dimensional form data of the deformed plate and acting force output parameters in the movement characteristic data of the die resetting part, and filling node physical properties and path transfer parameters in a core structure of the deformed plate resetting dynamic topology model to form a preliminary deformed plate resetting dynamic topology model; And adjusting the basic topology node association weight and the force transmission path coefficient in the initial abnormal plate resetting dynamic topology model through the static contact test data of the abnormal plate and the die, and generating the final abnormal plate resetting dynamic topology model.
3. 3. The method for simulating the resetting process of the stamping die for the irregular plate combined with data modeling according to claim 1, wherein the step of collecting the shape deformation data and the die resetting force real-time data in the resetting process of the irregular plate to generate a shape force coupling data chain comprises the following steps: Mounting miniature deformation sensors in topological node candidate areas on the surface of the irregular plate, and fixing sensor acquisition points according to the spatial distribution position of each topological node candidate area, so that each acquisition point corresponds to one topological node candidate area accurately; installing pressure sensors in topological node matching areas of the die, and arranging sensor detection surfaces according to the acting force output direction of each topological node matching area so that the detection surfaces completely correspond to the contact direction of the irregular plate; synchronously starting acquisition programs of the deformation sensor and the pressure sensor, setting a uniform acquisition time interval, setting the acquisition time interval according to the reset movement speed of the die, and capturing synchronous data of each movement moment; Acquiring real-time deformation data, deformation rate data and deformation recovery data of each topological node candidate region through a deformation sensor to form a deformed plate shape deformation data set, wherein the deformed plate shape deformation data set arranges deformation information of each topological node candidate region according to an acquisition time sequence; Collecting real-time acting force data, force change rate data and force transmission duration time data of each topological node matching area through a pressure sensor to form a die resetting force real-time data set, and arranging acting force information of each topological node matching area according to the collecting time sequence by the die resetting force real-time data set; extracting deformation data of all topological node candidate areas at the same acquisition time point in the deformed plate morphological deformation data set, and generating instantaneous deformation data frames, wherein each instantaneous deformation data frame comprises complete deformation parameters of all topological node candidate areas at the acquisition time point; extracting force data of all topological node matching areas at the same acquisition time point in the die resetting force real-time data set, and generating instantaneous force data frames, wherein each instantaneous force data frame comprises complete force parameters of all topological node matching areas at the time point; carrying out association binding on the instantaneous deformation data frames and the corresponding instantaneous force data frames, and sequentially connecting all frame data after association binding according to the acquisition time sequence to form a preliminary morphological force coupling data chain; And supplementing the timestamp information of each frame data in the preliminary morphological force coupling data chain with the corresponding identifier of the node, marking the attribution node and the acquisition time of each deformation data and acting force data, and generating a complete morphological force coupling data chain, wherein the morphological force coupling data chain continuously records the synchronous change information of the deformation of each contact area of the irregular plate and the corresponding reset force according to the time sequence, and each data node comprises a space position, a deformation parameter, an acting force parameter and a time parameter.
4. 4. The method for simulating the resetting process of the stamping die for the irregular plate combined with the data modeling according to claim 1, wherein the step of inputting the morphological force coupling data chain into the dynamic topological model for resetting the irregular plate, driving the dynamic topological model for resetting the irregular plate to dynamically reorganize topological nodes, and generating topological reorganization data comprises the following steps: analyzing each instantaneous deformation data frame and each instantaneous force data frame in the morphological force coupling data chain according to time sequence, and extracting the actual deformation of each topological node candidate region and the actual acting force of the corresponding topological node matching region; Calculating a deformation force adaptation coefficient of each basic topological node, wherein the deformation force adaptation coefficient is a ratio of an actual deformation amount of a corresponding topological node candidate region to an actual acting force of a topological node matching region, and reflects the adaptation degree of deformation and force of a node layer; Inputting deformation force adaptation coefficients of all basic topology nodes into a deformed plate reset dynamic topology model, comparing the deformation force adaptation coefficients with an adaptation coefficient threshold value which is initially set in the deformed plate reset dynamic topology model, and screening abnormal nodes of which the adaptation coefficients exceed a threshold value range; for the abnormal nodes, extracting continuous multi-frame deformation and force change data corresponding to the abnormal nodes in the morphological force coupling data chain, analyzing deformation trend and force change trend of the abnormal nodes, and positioning core reasons of the abnormal nodes; based on the deformation trend and the force change trend of the abnormal nodes, the association weight of the abnormal nodes and the adjacent nodes is adjusted, the node association strength is adjusted according to the degree of fitness of deformation and force, the association strength is improved when the degree of fitness of deformation and force meets the preset standard, and the association strength is reduced when the degree of fitness of deformation and force does not meet the preset standard; Reconstructing a force transmission path corresponding to the abnormal node, adjusting the path transmission direction according to the deformation trend, enabling the force transmission path to keep corresponding to the actual deformation direction of the deformed plate, and optimizing the path transmission coefficient to match the actual force transmission efficiency; For normal nodes which do not exceed the threshold value of the adaptation coefficient, coupling the association weight of the actual data fine-tuning node in the data chain with the path transfer coefficient according to morphological force, so that the node parameters are attached to the actual working conditions; Recording the association weight adjustment data, the force transmission path reconstruction data and the parameter fine adjustment data of all nodes to form node adjustment details, integrating the node adjustment details, generating a node association matrix and a force transmission path model after dynamic reorganization of topology nodes, and labeling the connection relation and the transmission rule of the reorganized basic topology nodes; integrating the recombined node incidence matrix, the force transmission path model and all node adjustment parameters to generate topology recombined data, wherein the topology recombined data is used for reflecting the node connection relation of deformed plates and reset force adaptation.
5. 5. The method for simulating a resetting process of a stamping die for a deformed plate combined with data modeling according to claim 1, wherein generating dynamically adapted resetting path data based on topology reorganization data comprises: Analyzing a node association matrix in the topology reorganization data, extracting space coordinate change data of a deformed plate topology node candidate region corresponding to each mold topology node matching region, and obtaining target position adjustment information of each component acting region; extracting a force transmission path model in the topology recombination data, determining the acting force transmission priority of each mold part, and sequencing according to the values of the path transmission coefficients to form a part acting force execution sequence; Combining the target position adjustment information and the acting force execution sequence, planning an initial motion track for each die resetting component, setting the initial motion track according to the shortest path from the current position of the component to the target position, and simultaneously integrating acting force transmission priority constraint; Extracting time stamp information in a morphological coupling data chain, determining time nodes with the adjusted association relation of each topological node, and taking the time nodes with the adjusted association relation of each topological node as segmented switching points of the movement track of the die; Dividing the initial motion track into a plurality of continuous track segments according to the segmented switching points, wherein each track segment corresponds to a component motion path in a time interval, so that the track segments and the node association relation are adjusted and synchronized; distributing a motion speed parameter to each track segment, wherein the motion speed parameter is set according to a force transmission coefficient value in the time interval, and the force transmission coefficient value and the motion speed value establish a corresponding relation according to a preset proportion; Integrating all track segments with corresponding speed parameters and time intervals to form dynamic motion track data of each die resetting part, wherein the dynamic motion track data of each die resetting part determine the motion path and speed of the part in different time intervals; Coordinating the movement time sequence of each mold part based on the dynamic movement track data of each mold resetting part and the acting force transmission priority, wherein the coordination of the movement time sequence of each mold part comprises generating mutual exclusion movement time periods of the parts in the overlapping areas based on the spatial position overlapping area data in the dynamic movement track data of the adjacent parts; extracting key position points, movement speed change points and action switching points in dynamic movement track data of each die resetting part to form a core parameter set of a dynamic adaptation resetting path; And integrating the dynamic motion trail data, the motion time sequence coordination data and the core parameter set of each mold part to generate dynamic adaptive reset path data, wherein the dynamic adaptive reset path data comprises the motion trail and the motion time sequence of each mold part after being adjusted according to the topological node relation.
6. 6. The method for simulating a resetting process of a stamping die for a deformed plate combined with data modeling according to claim 1, wherein the step of reversely inputting the data of the dynamically adapted resetting path into the dynamic topological model for resetting the deformed plate, iteratively optimizing the association strength of the topological nodes and the transmission coefficient of the resetting force, generating the simulated complete data after iterative optimization, and outputting the simulated complete data after iterative optimization comprises the following steps: extracting motion trail coordinate data and motion time sequence data of all parts of the die in the dynamic adaptation reset path data, and converting the motion trail coordinate data and the motion time sequence data of all parts of the die into node input parameters which can be identified by the abnormal plate reset dynamic topology model; reversely inputting the converted node input parameters into the deformed plate reset dynamic topology model to replace original node motion parameters and time sequence parameters in the deformed plate reset dynamic topology model; Extracting a node association strength initial value in topology reorganization data, and comparing the node association strength initial value with actual association strength data corresponding to a part motion trail in dynamic adaptation reset path data; Based on the comparison result, adjusting the association strength parameter of the topological node in the abnormal plate reset dynamic topological model to enable the association strength parameter of the topological node to correspond to the actual association strength data; extracting an initial value of a reset force transfer coefficient in the topology reorganization data, and comparing the initial value with actual transfer coefficient data corresponding to the force transfer efficiency in the dynamic adaptive reset path data; based on the comparison result, optimizing a reset force transfer coefficient in the abnormal plate reset dynamic topology model, so that the reset force transfer coefficient corresponds to actual transfer coefficient data; recording adjustment data of the association strength parameters of the topological nodes and optimization data of the reset force transfer coefficients, forming iterative optimization details, inputting the iterative optimization details into a deformed plate reset dynamic topological model, and driving the deformed plate reset dynamic topological model to recalculate the association relationship of the nodes and the force transfer paths; and extracting the recalculated node association data, force transmission path data and component motion trail optimization data, and outputting simulated complete data after iterative optimization, wherein the simulated complete data after iterative optimization comprises the adjusted topological node parameters, the reset force transmission parameters and the die motion path data.
7. 7. The method for simulating the resetting process of the stamping die for the irregular plate combined with the data modeling according to claim 2, wherein the step of collecting three-dimensional contour data, thickness distribution data and material elasticity data of the irregular plate and generating three-dimensional morphological data of the irregular plate through a three-dimensional modeling technology comprises the following steps: Adopting three-dimensional laser scanning equipment to perform full-surface scanning on the deformed plate, and recording the space coordinate data of each surface point of the deformed plate to form original three-dimensional contour data; Thickness measurement is carried out on different areas of the abnormal plate through an ultrasonic thickness gauge, and thickness values are recorded according to measurement positions to form original thickness distribution data; Elastic testing is carried out on the material of the abnormal plate by adopting material mechanical testing equipment, and elastic modulus data and Poisson ratio data of the material are recorded to form elastic data of the original material; Denoising the original three-dimensional contour data, removing abnormal point data generated in the scanning process, and forming purified three-dimensional contour data; Interpolation processing is carried out on the original thickness distribution data, and the thickness value of the measurement gap area is supplemented to form continuous thickness distribution data; carrying out mean value processing on the original material elasticity data, eliminating numerical fluctuation caused by test errors, and forming standard material elasticity data; importing purified three-dimensional contour data, continuous thickness distribution data and standard material elasticity data into three-dimensional modeling software; Constructing a three-dimensional solid model of the abnormal plate through three-dimensional modeling software, and endowing the three-dimensional solid model with thickness parameters and material elasticity parameters of the corresponding region; Performing grid division processing on the three-dimensional entity model to form grid model data containing space coordinates and physical parameters; And extracting space structure information and physical parameter information in the grid model data, and integrating to generate three-dimensional form data of the irregular plate, wherein the three-dimensional form data of the irregular plate completely presents the space structure and the physical parameter of the irregular plate.
8. 8. The method for simulating a resetting process of a stamping die for a deformed plate combined with data modeling according to claim 3, wherein the step of acquiring the real-time deformation data, the deformation rate data and the deformation recovery data of each topological node candidate region by using the deformation sensor to form a deformed plate morphological deformation data set comprises the following steps: Setting the acquisition frequency of the deformation sensor, wherein the acquisition frequency of the deformation sensor is consistent with the acquisition frequency of the pressure sensor, so that data acquisition is kept synchronous; capturing initial form data of a topology node candidate region by a detection unit of a deformation sensor, and taking the initial form data as deformation comparison reference data; Continuously capturing real-time morphological data of each topological node candidate area in the resetting process of the deformed plate, and performing difference calculation with deformation comparison reference data to obtain real-time deformation data; Calculating deformation variable values in unit time based on the real-time deformation data acquired in two adjacent times to obtain deformation rate data; continuously collecting the shape recovery data of the topology node candidate region after the reset action is stopped, and recording the process data from the end of the reset to the stabilization of the shape to obtain deformation recovery data; allocating a unique data identifier for each topological node candidate region, and associating the data identifier with corresponding real-time deformation data, deformation rate data and deformation recovery data; Sequencing real-time deformation data, deformation rate data and deformation recovery data corresponding to each data identifier according to the acquisition time sequence to form a deformation data sequence of a single node; collecting single node deformation data sequences of all topological node candidate areas to form a preliminary deformed plate form deformation data set; And supplementing the acquisition time stamp and the node position information of each data sequence, perfecting the associated information of the deformed plate form deformation data set, and generating a complete deformed plate form deformation data set, wherein the deformed plate form deformation data set arranges the deformation information of each topological node candidate region according to the acquisition time sequence.
9. 9. The method for simulating a resetting process of a stamping die for a deformed plate combined with data modeling according to claim 4, wherein the reconstructing the force transmission path corresponding to the abnormal node adjusts the path transmission direction according to the deformation trend, so that the force transmission path corresponds to the actual deformation direction of the deformed plate, and the optimizing the path transmission coefficient to match the actual force transmission efficiency comprises: extracting deformation trend data of abnormal nodes, and determining main direction and change amplitude data of deformation; Planning a new force transmission path direction based on the deformation main direction data, so that the new path direction and the deformation main direction form a complementary angle; Setting the branch number of the force transmission path according to the deformation change amplitude data, distributing the deformation change amplitude data and the path branch number according to a preset corresponding relation, and determining the branch number according to actual deformation requirements; Extracting position data of adjacent normal nodes of the abnormal node, wherein the adjacent normal nodes are used as connecting nodes of a new force transmission path; constructing a path segment between an abnormal node and an adjacent normal node to form a preliminary reconstruction force transmission path; calculating length data and path resistance data of the primary reconstruction force transmission path, and setting an initial path transmission coefficient based on the length data and the path resistance data of the primary reconstruction force transmission path; Extracting actual force conduction efficiency data corresponding to abnormal nodes in the morphological force coupling data chain; Adjusting the initial path transfer coefficient to enable the conduction efficiency corresponding to the adjusted path transfer coefficient to correspond to the actual force conduction efficiency data; And recording the direction data, the branch data, the connection node data and the optimized path transfer coefficients of the reconstructed force transfer path, and generating complete abnormal node force transfer path reconstruction data, wherein the abnormal node force transfer path reconstruction data comprises the adjusted path transfer direction and the path transfer coefficients matched with the actual force transfer efficiency.
10. 10. The utility model provides a special-shaped plate stamping die reset process analog system that combines data modeling which characterized in that includes: A processor; A machine-readable storage medium storing machine-executable instructions for the processor; Wherein the processor is configured to perform the data modeling-incorporated profiled-sheet stamping die resetting process simulation method of any one of claims 1 to 9 via execution of the machine-executable instructions.

Description

Abnormal plate stamping die resetting process simulation method and system combined with data modeling Technical Field The invention relates to the technical field of computer modeling, in particular to a method and a system for simulating a resetting process of a stamping die of a special-shaped plate in combination with data modeling. Background In the production and application fields of the stamping die for the irregular plate, the quality and the production efficiency of a stamped product are directly influenced by the resetting process after the stamping forming of the irregular plate. Traditional researches on the resetting process of the stamping die for the deformed plate are focused on the mechanical motion principle of the die part and simple mechanical analysis. For example, the force required for die resetting and the motion trail of the component are estimated through theoretical calculation and an empirical formula, but the method often neglects the influence of complex morphological characteristics of the deformed plate on the resetting process. In addition, in the prior art, a finite element analysis method is adopted to simulate the die resetting process, however, the finite element analysis needs to construct a fine grid model, the grid division difficulty is high for the parts with complex and irregular shapes of the irregular plates, the calculation amount is huge, and the dynamic coupling relation between the shapes and the stress of the irregular plates in the resetting process is difficult to accurately capture. Meanwhile, the synchronous change between the deformation of the irregular plate and the reset force of the die cannot be reflected in real time by the existing method, and an accurate dynamic adaptation reset path is difficult to generate, so that the accuracy and reliability of the die reset process simulation are low, and the requirements of modern high-precision stamping production cannot be met. Disclosure of Invention In view of the above-mentioned problems, in combination with the first aspect of the present invention, an embodiment of the present invention provides a method for simulating a resetting process of a stamping die for a deformed plate in combination with data modeling, the method including: constructing a deformed plate reset dynamic topology model based on the deformed plate three-dimensional form data and the movement characteristic data of the die reset part, wherein the deformed plate reset dynamic topology model associates a deformed plate contact area with a die reset acting force transmission path through a topology node; acquiring form deformation data and die reset force real-time data in the resetting process of the deformed plate, and generating a form force coupling data chain, wherein the form force coupling data chain records synchronous change information of deformation of each contact area of the deformed plate and corresponding reset force; inputting the morphological force coupling data chain into a deformed plate reset dynamic topology model, driving the deformed plate reset dynamic topology model to dynamically reorganize topological nodes, and generating topological reorganization data, wherein the topological reorganization data reflects the node connection relation between deformed plates and the reset force after being adapted; Generating dynamic adaptive reset path data based on topology recombination data, wherein the dynamic adaptive reset path data comprises a motion track and a motion time sequence of each component of the die after adjustment according to the topology node relation; and reversely inputting the dynamic adaptive reset path data into the abnormal plate reset dynamic topology model, iteratively optimizing the association strength of the topology nodes and the reset force transfer coefficient, and generating the simulated complete data after iterative optimization. In still another aspect, an embodiment of the present invention further provides a system for simulating a resetting process of a stamping die for a deformed plate in combination with data modeling, where the system is characterized by including: The system comprises a processor, a machine-readable storage medium for storing machine-executable instructions of the processor, wherein the processor is configured to execute the abnormal plate stamping die resetting process simulation method combined with data modeling through executing the machine-executable instructions. In still another aspect, an embodiment of the present invention further provides a computer program product, where the computer program product includes machine executable instructions stored in a computer readable storage medium, and a processor of the data modeling-combined abnormal plate stamping die resetting process simulation system reads the machine executable instructions from the computer readable storage medium, and executes the machine executable instructions, so that the data mo