A method, device, process equipment and storage medium for reconstructing an appearance surface of a stamped part

Abstract

This invention relates to a method, apparatus, process equipment, and storage medium for reconstructing the appearance surface of a stamped part. The method includes: in response to a command to reconstruct the appearance surface of a stamped part, acquiring initial product surface data and springback compensation surface data of the stamped part; identifying basic attribute parameters, surface quality parameters, and feature edge chord lengths corresponding to the initial product surface data; adjusting the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters to determine an initial reconstructed surface; determining surface control points of the initial reconstructed surface; adjusting the surface control points based on the surface quality parameters to determine a target reconstructed surface; constructing feature edges based on the feature edge chord lengths; and combining the feature edges and the target reconstructed surface to determine appearance surface reconstruction data. Through these embodiments, high-precision stamped part appearance surfaces can be reconstructed, thereby improving the manufacturing accuracy of stamped parts.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, specifically to a method for reconstructing the appearance of a stamped part, a device for reconstructing the appearance of a stamped part, a process equipment, and a computer-readable storage medium. Background Technology

[0002] Stamped parts, such as automotive body panels, are often produced using die stamping processes. During the forming process, the elastic deformation of the material causes the part to deform, requiring pre-treatment of the die surface for springback compensation to ensure the dimensional accuracy of these stamped parts. However, springback compensation also compromises the quality of the initial product's surface (A-side), causing it to no longer meet the requirements for continuity, curvature, accuracy, and order, and even resulting in defects such as zebra stripe distortion and reversed curvature direction. If this springback compensation surface is directly used as the die surface for the stamped part's surface, these surface problems will be directly reflected in the final formed part, resulting in uneven zebra stripes, indentations, and dents, leading to insufficient manufacturing accuracy in terms of dimensions and surface quality. Summary of the Invention

[0003] One objective of this invention is to provide a method for reconstructing the appearance of stamped parts, so as to solve the problems of low appearance accuracy and low manufacturing accuracy of stamped parts in the prior art; a second objective is to provide a device for reconstructing the appearance of stamped parts; a third objective is to provide a process equipment; and a fourth objective is to provide a computer-readable storage medium.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for reconstructing the appearance of a stamped part, comprising: In response to a command to reconstruct the appearance of a stamped part, the initial product surface data and springback compensation surface data of the stamped part are obtained. Identify the basic attribute parameters, surface quality parameters, and feature edge chord lengths of the initial product surface corresponding to the initial product surface data; The springback compensation surface corresponding to the springback compensation surface data is adjusted using the basic attribute parameters to determine the initial reconstructed surface; Determine the surface control points of the initial reconstructed surface; Adjust the surface control points based on the surface quality parameters to determine the target reconstructed surface; Construct the feature edge based on the chord length of the feature edge; By combining the feature edges and the target reconstructed surface, the appearance surface reconstruction data is determined.

[0005] Optionally, the basic attribute parameters include the initial surface order, and the step of adjusting the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters to determine the initial reconstructed surface includes: Adjust the number of segments of the springback compensation surface corresponding to the springback compensation surface data to 1; Adjust the order of the springback compensation surface corresponding to the springback compensation surface data to be consistent with the order of the initial surface, and determine the initial reconstructed surface.

[0006] Optionally, the surface quality parameters include initial surface shape parameters and initial surface size parameters, and the step of adjusting the surface control points based on the surface quality parameters to determine the target reconstructed surface includes: Surface matching is performed on the surface control points based on the initial surface shape parameters; Based on the initial surface size parameters, the surface control points are approximated to determine the target reconstructed surface.

[0007] Optionally, the step of constructing the feature edge based on the chord length of the feature edge includes: Construct a feature edge with the same length as the chord of the feature edge.

[0008] Optionally, it also includes: Obtain the mold product parameters of the stamping part, the mold product parameters including mold surface parameters; The mold surface parameters are replaced with the appearance surface reconstruction data to update the mold product parameters.

[0009] Optionally, it also includes: Perform full-process springback analysis on the updated mold product parameters to generate reconstruction verification information.

[0010] Optionally, it also includes: If the reconstruction verification information indicates that the reconstruction verification has failed, the step of adjusting the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters and determining the initial reconstruction surface is performed until the reconstruction verification information indicates that the reconstruction verification has succeeded.

[0011] A device for reconstructing the appearance of a stamped part, comprising: The acquisition module is used to acquire the initial product surface data and springback compensation surface data of the stamped part in response to the surface reconstruction command for the stamped part. The identification module is used to identify the basic attribute parameters, surface quality parameters, and feature edge chord lengths of the initial product surface corresponding to the initial product surface data; The first adjustment module is used to adjust the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters, and to determine the initial reconstructed surface. The determination module is used to determine the surface control points of the initial reconstructed surface; The second adjustment module is used to adjust the surface control points based on the surface quality parameters to determine the target reconstructed surface. A construction module is used to construct a feature edge based on the chord length of the feature edge; The module is used to combine the feature edges and the target reconstructed surface to determine the appearance surface reconstruction data.

[0012] A process apparatus includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the steps of the stamping part appearance surface reconstruction method as described above.

[0013] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the stamping part appearance surface reconstruction method as described above.

[0014] The beneficial effects of this invention are: This invention adjusts the springback compensation surface corresponding to the springback compensation surface data by adjusting the basic attribute parameters, ensuring that the surface properties of the initial reconstructed surface based on the springback compensation surface are consistent with those of the initial product surface. By adjusting the surface control points through surface quality parameters, the surface quality and dimensional deviations of the initial reconstructed surface are adjusted, thus determining the target reconstructed surface. This target reconstructed surface achieves surface quality and dimensions consistent with the initial product surface. Finally, the feature edges and the target reconstructed surface are combined to smooth the curvature of the target reconstructed surface, thereby determining the appearance surface reconstruction data. This achieves high-precision surface reconstruction of the stamped part's appearance surface. Furthermore, applying this appearance surface reconstruction data to the stamping manufacturing process allows for the production of high-precision stamped part appearance surfaces, improving manufacturing accuracy. Attached Figure Description

[0015] Figure 1 This is a flowchart illustrating the steps of an embodiment of a method for reconstructing the appearance of a stamped part according to the present invention; Figure 2 This is a flowchart illustrating the steps of another embodiment of the method for reconstructing the outer surface of a stamped part according to the present invention; Figure 3a This is a schematic diagram of the basic attribute parameters of the springback compensation surface of a stamped part according to the present invention; Figure 3b This is a schematic diagram of the basic attribute parameters of the initial reconstructed curved surface of the appearance surface of a stamped part according to the present invention; Figure 3c This is a schematic diagram of the basic attribute parameters of the initial product surface of a stamped part according to the present invention; Figure 4aThis is a schematic diagram of the zebra stripe pattern on the springback compensation surface of a stamped part according to the present invention. Figure 4b This is a schematic diagram of the zebra stripe pattern of the target reconstructed curved surface of the outer surface of a stamped part according to the present invention; Figure 4c This is a schematic diagram of the zebra stripe pattern on the initial product surface of a stamped part according to the present invention; Figure 5a This is a schematic diagram of the surface curvature of the springback compensation surface of a stamped part according to the present invention; Figure 5b This is a schematic diagram of the surface curvature of the target reconstructed surface of a stamped part according to the present invention; Figure 5c This is a schematic diagram of the surface curvature of the initial product surface of a stamped part according to the present invention; Figure 6 This is a schematic diagram illustrating the deviation of the target reconstructed surface of a stamped part according to the present invention; Figure 7 This is a schematic diagram illustrating the continuity of the target reconstructed surface of a stamped part according to the present invention; Figure 8a This is a schematic diagram of the first dimensional deviation distribution of the target reconstructed curved surface of the outer surface of a stamped part according to the present invention; Figure 8b This is a schematic diagram of the second dimensional deviation distribution of the target reconstructed surface of the outer surface of a stamped part according to the present invention; Figure 9 This is a flowchart illustrating the steps of a method for reconstructing the appearance of a stamped part according to the present invention. Figure 10 This is a structural block diagram of an embodiment of a stamping part appearance surface reconstruction device according to the present invention; Figure 11 This is a structural block diagram of a process equipment provided in an embodiment of the present invention; Figure 12 This is a structural block diagram of a storage medium provided in an embodiment of the present invention. Detailed Implementation

[0016] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0017] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0018] Reference Figure 1 The diagram illustrates a step flowchart of an embodiment of a method for reconstructing the appearance of a stamped part according to the present invention. The method for reconstructing the appearance of a stamped part may specifically include the following steps: Step 101: In response to the surface reconstruction command for the stamped part, obtain the initial product surface data and springback compensation surface data of the stamped part; The exterior surface of a stamped part is called its A-level surface, or simply A-surface. The A-surface is the most prominent exposed surface after assembly, directly affecting the appearance and texture, and also the surface with the highest quality and process requirements. In vehicles, the A-surface can include, but is not limited to, the outer surface of the door panel, engine compartment panel, fender, roof, trunk lid, and front and rear bumpers. When it is necessary to reconstruct the exterior surface of a stamped part, a surface reconstruction command can be triggered. In response to the surface reconstruction command, the initial product surface data and springback compensation surface data of the stamped part are obtained. The initial product surface data characterizes the initial product surface of the stamped part, including but not limited to the dimensions, surface appearance parameters, surface mathematical properties, and surface structural properties of the initial product surface. Springback compensation surface data for stamped parts is used to characterize the springback compensation surface of stamped parts, including but not limited to the dimensions, surface appearance parameters, surface mathematical properties, surface structural properties, springback compensation amount, and other related data of the springback compensation surface. The springback compensation surface of stamped parts is a curved surface formed by pre-deformation in the die to compensate for springback after metal stamping, based on the initial product surface.

[0019] Step 102: Identify the basic attribute parameters, surface quality parameters, and feature edge chord lengths of the initial product surface corresponding to the initial product surface data; It can identify various parameters corresponding to the initial product surface data, determining the basic attribute parameters, surface quality parameters, and feature edge chord lengths of the initial product surface. The basic attribute parameters characterize the mathematical structural properties of the initial product surface. The surface quality parameters characterize the surface quality requirements of the initial product surface. The feature edge chord length characterizes the chord length of the feature edges of the initial product surface.

[0020] Step 103: Adjust the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters to determine the initial reconstructed surface; The springback compensation surface corresponding to the springback compensation surface data can be adjusted using basic attribute parameters to match the surface's mathematical and structural properties with the initial product surface, thus generating the initial reconstructed surface. The initial reconstructed surface is the surface formed after the springback compensation surface has been adjusted using basic attribute parameters.

[0021] Step 104: Determine the surface control points of the initial reconstructed surface; Based on the surface features of the initial reconstructed surface, the surface control points of the initial reconstructed surface are determined. The number and distribution of the surface control points of the initial reconstructed surface are determined based on the actual situation, and this embodiment of the invention does not impose any limitations on this.

[0022] Step 105: Adjust the surface control points based on the surface quality parameters to determine the target reconstructed surface; The position and distribution of surface control points can be adjusted using surface quality parameters to modify the initial reconstructed surface and generate the target reconstructed surface.

[0023] Step 106: Construct the feature edge based on the chord length of the feature edge; Based on the size of the feature edge chord length, a corresponding edge can be constructed on the target reconstructed surface as a feature edge.

[0024] Step 107: Combine the feature edges and the target reconstructed surface to determine the appearance surface reconstruction data.

[0025] The feature edges and the target reconstructed surface are combined to form complete surface data, which is then used as the appearance surface reconstruction data. The reconstructed appearance surface is characterized by the appearance surface reconstruction data.

[0026] This invention adjusts the springback compensation surface corresponding to the springback compensation surface data by adjusting the basic attribute parameters, ensuring that the surface properties of the initial reconstructed surface based on the springback compensation surface are consistent with those of the initial product surface. By adjusting the surface control points through surface quality parameters, the surface quality and dimensional deviations of the initial reconstructed surface are adjusted, thus determining the target reconstructed surface. This target reconstructed surface achieves surface quality and dimensions consistent with the initial product surface. Finally, the feature edges and the target reconstructed surface are combined to smooth the curvature of the target reconstructed surface, thereby determining the appearance surface reconstruction data. This achieves high-precision surface reconstruction of the stamped part's appearance surface. Furthermore, applying this appearance surface reconstruction data to the stamping manufacturing process allows for the production of high-precision stamped part appearance surfaces, improving manufacturing accuracy.

[0027] Reference Figure 2 The diagram illustrates a step flowchart of another embodiment of the method for reconstructing the appearance of a stamped part according to the present invention. The method for reconstructing the appearance of a stamped part may specifically include the following steps: Step 201: In response to the surface reconstruction command for the stamped part, obtain the initial product surface data and springback compensation surface data of the stamped part; When it is necessary to reconstruct the appearance of a stamped part, a surface reconstruction command for the stamped part can be triggered. In response to the surface reconstruction command for the stamped part, the initial product surface data and springback compensation surface data of the stamped part can be obtained from the model of the stamped part.

[0028] For example, CAD (Computer-Aided Design) engineering software can be used to perform structural analysis on the model of the stamped part, outputting the initial product reference side data as the initial product surface data in STP (Product Model Data Exchange Standard File) or CATPart (CATIA Dedicated Part File) format. The initial product surface corresponding to the initial product surface data can be used as a reference surface for surface quality inspection during appearance surface reconstruction. Correspondingly, CAD engineering software can also be used to perform structural analysis on the model of the stamped part, outputting the springback compensation surface data as the springback compensation surface data in STP or CATPart format. The springback compensation surface corresponding to the springback compensation surface data can be used as a reference surface during appearance surface reconstruction. As for the generation process of the springback compensation surface, Autoform (sheet metal forming simulation software) software can be used to iteratively compensate the original product surface. After the iterative compensation is qualified, vector information is generated. The vector information is used to drive the deformation of the mold surface to obtain the springback compensation surface that meets the CAE (Computer-Aided Simulation) analysis standards. For the implementation of iterative compensation for springback compensation surfaces, the initial product surface must meet the requirements of forming simulation convergence before iterative compensation in Autoform software, and must be free from formability issues such as cracking, wrinkling, and excessive thinning. Springback analysis based on the RPS (Reference Point System) benchmark must be completed, and the springback deformation trend must be stable without any abnormal abrupt changes, demonstrating compensability. Then, iterative compensation using Autoform software must meet the conditions of springback compensation iterative convergence and the dimensions meeting tolerance requirements after compensation to generate a springback compensation surface. The generated springback compensation surface must meet the following standards: a) the surface and feature edges must be free from obvious collapse, distortion, torsion, and warping quality issues; b) the relative positions of the contour, cross-section, and feature edges must conform to the line length variation standard.

[0029] Step 202: Identify the basic attribute parameters, surface quality parameters, and feature edge chord lengths of the initial product surface corresponding to the initial product surface data; By classifying, identifying, and querying the feature data corresponding to the initial product surface data, the basic attribute parameters, surface quality parameters, and feature edge chord lengths of the initial product surface can be identified from the initial product surface data. The basic attribute parameters and surface quality parameters can be determined through feature identification and classification of the initial product surface data. The feature edge chord length can be determined by measuring the initial product surface corresponding to the initial product surface data.

[0030] Step 203: Adjust the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters to determine the initial reconstructed surface; Industrial design software can be used to fit the springback compensation surface data to derive the corresponding springback compensation surface. The properties of the springback compensation surface are then adjusted using basic attribute parameters in the industrial software to generate the initial reconstructed surface. Industrial software includes, but is not limited to, Alias, ICEM Surf, and CATIA.

[0031] In an optional embodiment of the present invention, the basic attribute parameters include the initial surface order, and the step of adjusting the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters to determine the initial reconstructed surface includes: adjusting the number of segments of the springback compensation surface corresponding to the springback compensation surface data to 1; adjusting the order of the springback compensation surface corresponding to the springback compensation surface data to be consistent with the order of the initial surface, and determining the initial reconstructed surface.

[0032] Industrial design software can be used to modify the number of segments and the order of the springback compensation surface. Setting the number of segments of the springback compensation surface corresponding to the springback compensation surface data to 1 forces the compensation surface to be a single-segment surface, ensuring that the compensated springback compensation surface is smooth, seamless, and has continuous curvature, avoiding surface defects and processing problems caused by multi-segment splicing. Then, adjust the order of the springback compensation surface corresponding to the springback compensation surface data to match the order of the initial surface, determining the initial reconstructed surface and ensuring that the properties of the springback compensation surface are consistent with the initial product surface. (Refer to...) Figure 3c Using the initial product surface segment and grade as a reference; Figure 3a The number of segments on the springback compensation surface is modified to 1, and the order is changed to match the order of the initial product surface, generating a result as shown below. Figure 3b The initial reconstructed surface is shown.

[0033] Furthermore, the surface of a stamped part may have multiple different curved surfaces. In this case, adjustments can be made sequentially based on different types of surfaces. For example, adjustments can be made gradually from the bottom surface upwards, starting with the base surface and progressing to the transition surface. The surface classification of the stamped part's surface can be achieved by canceling trimming and restoring the complete boundaries of the initial product surface to distinguish between the base and transition surfaces, as well as to determine the matching method between the surfaces.

[0034] Step 204: Determine the surface control points of the initial reconstructed surface; Perform springback analysis on the initial reconstructed surface to determine its surface control points. If using Autoform software, export the springback analysis constraint points as the surface control points for the initial reconstructed surface, outputting them in STP or CATPart format. These springback analysis constraint points are support clamping points defined using a 3-2-1 constraint method based on the product's RPS (Referenzpunkt-Systematik) datum system. The purpose is to eliminate rigid displacement of the part and ensure consistency between the springback analysis results and the fixture measurement conditions. These points are used as reference points during surface reconstruction to ensure that the springback analysis results of the reconstructed surface are consistent with those before reconstruction.

[0035] Step 205: Adjust the surface control points based on the surface quality parameters to determine the target reconstructed surface; Using commands in industrial design software, the positions of surface control points are adjusted based on surface quality parameters to generate a defined target reconstructed surface. The surface quality of the target reconstructed surface, such as zebra stripe trend, surface curvature direction, and continuity, is ensured to be consistent with the initial product surface, guaranteeing the quality and accuracy of the target reconstructed surface.

[0036] In an optional embodiment of the present invention, the surface quality parameters include initial surface shape parameters and initial surface size parameters. The step of adjusting the surface control points based on the surface quality parameters to determine the target reconstructed surface includes: performing surface matching on the surface control points based on the initial surface shape parameters; and performing point approximation processing on the surface control points based on the initial surface size parameters to determine the target reconstructed surface.

[0037] Based on the initial surface shape parameters, the corresponding operation commands in the industrial design software are determined, and surface matching is performed on the surface control points to ensure that the continuity between surfaces in the initial reconstructed surface meets the quality requirements of the appearance surface. The initial surface shape parameters can include, but are not limited to, zebra stripes, surface curvature, etc. For example, for zebra stripes, the Horizontal command in Alias ​​software can be used, based on... Figure 4c Using the zebra stripe pattern on the initial product surface as a reference, in such a way... Figure 4a On the rebound compensation surface shown, select the line segment corresponding to the zebra stripe that needs adjustment, make the selected line segment strictly horizontal, and lock its angle. Align two or more points on the same horizontal line with the same vertical axis coordinate, and adjust to achieve the desired result. Figure 4b The zebra stripes on the target reconstructed surface are shown. For surface curvature, the Surface to Surface Tool in Alias ​​software can be used to achieve positional, tangent, or curvature continuity between the edges of one surface and another in the target reconstructed surface. For example, ... Figure 5cThe surface curvature of the initial product surface is used as a reference in, for example... Figure 5a On the springback compensation surface shown, select the surface object that needs adjustment, and perform transition correction based on three successive levels: G0 (position), G1 (tangent), and G2 (curvature), to obtain the following result: Figure 5b The surface curvature of the target reconstructed surface is shown.

[0038] Furthermore, by using a point approximation method, the initial reconstructed surface is adjusted using the initial surface dimension parameters to generate a target reconstructed surface, ensuring that the deviation between the target reconstructed surface and the springback compensation surface meets the dimensional accuracy requirements. The dimensional accuracy requirements can be determined based on actual conditions, and this embodiment of the invention does not impose limitations. For example, such as... Figure 6 As shown, the dimensional accuracy requirements include a dimensional deviation of ≤ ±0.2 mm between the target reconstructed surface and the springback compensation surface; and a dimensional deviation of ≤ ±0.05 mm in the support point area.

[0039] Step 206: Construct the feature edge based on the chord length of the feature edge; The feature edge on the target reconstructed surface can be determined based on the size of the chord length of the feature edge.

[0040] In an optional embodiment of the present invention, the step of constructing a feature edge based on the chord length of the feature edge includes: constructing a feature edge with the same length as the chord length of the feature edge.

[0041] By adjusting the chord length of the feature edge, feature edges of equal length can be constructed at corresponding positions on the target reconstructed surface. This ensures that the target reconstructed surface replicates the same edges as the original product surface, maintaining a consistent feature profile. Furthermore, the feature edges can be rounded to create smooth transitions. For example, in industrial design software, the rounding command can be used to round the feature edges. Similarly, in Alias ​​software, different matching (align command) parameters can be set to construct feature edges, ensuring continuity between surfaces. Figure 7 As shown, the surface continuity requirement in the target reconstructed surface is G2 curvature continuity to ensure that the curvature comb has no abrupt changes and the lighting is smooth; the feature edge region can be matched to the G0 position continuity first, and then the G2 curvature continuity between surfaces can be achieved after the feature edge is constructed.

[0042] Step 207: Combine the feature edges and the target reconstructed surface to determine the appearance surface reconstruction data; Feature edges can be combined with the target reconstructed surface to determine the appearance surface reconstruction data, thereby highlighting the feature edges on the product on the target reconstructed surface.

[0043] Step 208: Obtain the mold product parameters of the stamping part, including mold surface parameters; It is possible to obtain the mold product parameters for stamping parts. The mold product parameters are the various structural parameters corresponding to the stamping dies used to manufacture stamping parts. The mold product parameters include the mold surface parameters, which are used to characterize the surface parameters corresponding to the mold surface of the stamping die.

[0044] Step 209: Replace the mold surface parameters with the appearance surface reconstruction data to update the mold product parameters; The die surface parameters are replaced by prior appearance surface reconstruction data. This involves replacing the appearance surface portion of the springback compensation surface of the stamping die with the reconstructed appearance surface, thereby updating the die product parameters. The die product parameters are used to replace the die surface throughout the entire process, with the reconstructed appearance surface data serving as the surface during stamping manufacturing. For example, appearance surface reconstruction data can be imported into Autoform software, and used to replace the die surface parameters, completing the replacement of the die surface throughout the entire process and updating the die product parameters.

[0045] Step 210: Perform a full-process springback analysis on the updated mold product parameters to generate reconstruction verification information; A full-process springback analysis can be performed on the updated mold product parameters to confirm whether the updated parameters meet production requirements for intermediate parts and the final workpiece in the stamping manufacturing process, thus determining the reconstruction verification information. This verification information demonstrates the reliability of the updated mold product parameters for manufacturing. For example, a successful reconstruction verification indicates that the mold corresponding to the updated parameters meets production requirements, resulting in high manufacturing reliability. A failed verification indicates that the mold corresponding to the updated parameters does not meet production requirements, resulting in low manufacturing reliability. For full-process springback analysis, the updated mold product parameters can be imported into Autoform software, which performs the analysis and outputs the reconstruction verification information.

[0046] Step 211: If the reconstruction verification information indicates that the reconstruction verification has failed, perform the step of adjusting the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters to determine the initial reconstruction surface until the reconstruction verification information indicates that the reconstruction verification has succeeded.

[0047] If the reconstruction verification information indicates successful reconstruction, meaning the mold corresponding to the updated mold product parameters meets manufacturing requirements and the reconstructed appearance surface has achieved dimensional accuracy standards, then the reconstruction of the appearance surface is complete, and the updated mold product parameters can be used directly. If the reconstruction verification information indicates failed reconstruction, meaning the currently reconstructed appearance surface applied to the mold cannot meet manufacturing requirements, or at least partially fails to meet dimensional accuracy standards, further reconstruction and adjustment of the appearance surface are required. This can be achieved by re-exercising the springback compensation surface corresponding to the springback compensation surface data using the aforementioned basic attribute parameters, and continuing this process until the reconstruction verification information indicates successful reconstruction, thereby adjusting the reconstructed appearance surface to meet manufacturing requirements. For example, when the reconstruction verification information indicates failed reconstruction, the dimensional deviation is as follows: Figure 8a As shown, based on the analysis results, the corresponding surface control points (CV) are adjusted in Alias ​​software, and the surface quality is checked simultaneously. When reconstructing the target surface and the important matching surfaces of surrounding parts, the deviation direction should be controlled to favor the springback analysis results. If the springback analysis results show upward springback in this area, then the control points of the reconstructed surface are adjusted to make the dimensional deviation negative, until the springback analysis of the entire process is as shown. Figure 8b As shown, the reconstruction verification information output after all deviations meet the requirements indicates that the reconstruction verification was successful.

[0048] This invention, through modifications to fundamental attribute parameters such as order and number of segments, and by using surface quality parameters such as surface matching and adjustment, repairs various surface attributes after springback compensation. This ensures that the target reconstructed surface meets quality requirements for continuity, curvature, light and shadow reflection, accuracy, and order, avoiding defects in the appearance of stamped parts caused by springback compensation. Simultaneously, adjusting the surface control points (CV) optimizes dimensional accuracy, ensuring that the reconstructed target surface meets dimensional accuracy standards. This achieves the dimensional accuracy requirements for matching with surrounding parts after engineering manufacturing, resulting in a high-precision reconstructed appearance surface. Using the reconstructed appearance surface data for product manufacturing can generate high-precision stamped parts, improving the manufacturing accuracy of stamped parts.

[0049] To enable those skilled in the art to clearly understand the operation process of the embodiments of the present invention, please refer to... Figure 9 The following example illustrates this: S1. Obtain data related to surface A reconstruction. Obtain the data used for reconstructing surface A, i.e., the data related to the appearance surface reconstruction, including but not limited to the initial product surface data and springback compensation surface data of the stamped part.

[0050] S2. Using industrial design software, reconstruct surface A. Import all data from step S1 into Alias ​​software and store them in layers. Determine the order of surface reconstruction based on the shape of the stamped part and the matching method of each surface in the initial product surface. Copy the springback compensation surface to be reconstructed to a new layer, modify the number of segments of the surface to 1, and modify the order of the surface to be consistent with the properties of the initial product surface. Use commands such as Horizontal (zebra stripes) and Surface to Surface Tool (surface deviation) in Alias ​​software to check the zebra stripes, surface curvature, and dimensional deviation between the reconstructed surface and the initial product surface. Adjust the control points (CV) of the reconstructed surface and simultaneously check the surface quality and dimensional deviation until its zebra stripes and surface curvature are consistent with the initial product surface. Set different matching (align command) parameters according to the overlapping method of the initial product surface to build the continuity between the surfaces in the reconstructed surface. Measure the chord length of the feature edge of the initial product, construct the reconstructed feature edge according to the size of the chord length, and combine it with the reconstructed surface.

[0051] S3. Replace mold surface related data. Replace the appearance surface part of the springback compensation surface with the surface reconstructed in step S2, and update the mold product data.

[0052] S4. CAE Analysis and Verification. Import the mold surface of the entire process completed in step S3 into the Autoform software to complete the springback analysis of the entire process; check the springback analysis results. If the dimensional accuracy standard has been met, the reconstruction of surface A is complete; if the dimensional accuracy standard is not met in some areas, adjust the control points (CV) of the corresponding reconstructed surface in the Alias ​​software according to the analysis results, and check the surface quality simultaneously until the springback analysis results meet the dimensional accuracy standard.

[0053] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0054] Reference Figure 10 The diagram shows a structural block diagram of an embodiment of a stamping part appearance surface reconstruction device according to this application. The stamping part appearance surface reconstruction device may specifically include the following modules: The acquisition module 1001 is used to acquire the initial product surface data and springback compensation surface data of the stamping part in response to the surface reconstruction command for the stamping part. The identification module 1002 is used to identify the basic attribute parameters, surface quality parameters and feature edge chord lengths of the initial product surface corresponding to the initial product surface data; The first adjustment module 1003 is used to adjust the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters, and to determine the initial reconstructed surface. The determining module 1004 is used to determine the surface control points of the initial reconstructed surface; The second adjustment module 1005 is used to adjust the surface control points based on the surface quality parameters to determine the target reconstructed surface; Construction module 1006 is used to construct a feature edge based on the chord length of the feature edge; The module 1007 is used to combine the feature edge and the target reconstructed surface to determine the appearance surface reconstruction data.

[0055] In an optional embodiment of the present invention, the basic attribute parameters include the initial surface order, and the first adjustment module 1003 includes: The first adjustment submodule is used to adjust the number of segments of the springback compensation surface corresponding to the springback compensation surface data to 1; The second adjustment submodule is used to adjust the order of the springback compensation surface corresponding to the springback compensation surface data to be consistent with the order of the initial surface, thereby determining the initial reconstructed surface.

[0056] In an optional embodiment of the present invention, the surface quality parameters include initial surface shape parameters and initial surface size parameters, and the second adjustment module 1005 includes: The third adjustment submodule is used to perform surface matching on the surface control points based on the initial surface shape parameters; The fourth adjustment submodule is used to perform point approximation processing on the surface control points based on the initial surface size parameters to determine the target reconstructed surface.

[0057] In an optional embodiment of the present invention, the construction module 1006 includes: A submodule is constructed to construct a feature edge with the same length as the chord of the feature edge.

[0058] In an optional embodiment of the present invention, the device further includes: The product module is used to obtain the mold product parameters of the stamping part, including mold surface parameters; The update submodule is used to replace the mold surface parameters with the appearance surface reconstruction data in order to update the mold product parameters.

[0059] In an optional embodiment of the present invention, the device further includes: The verification module is used to perform full-process springback analysis on the updated mold product parameters and generate reconstruction verification information.

[0060] In an optional embodiment of the present invention, the device further includes: The loop module is used to execute the step of adjusting the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters and determining the initial reconstructed surface when the reconstruction verification information is that the reconstruction verification is successful, until the reconstruction verification information is that the reconstruction verification is successful.

[0061] This invention adjusts the springback compensation surface corresponding to the springback compensation surface data by adjusting the basic attribute parameters, ensuring that the surface properties of the initial reconstructed surface based on the springback compensation surface are consistent with those of the initial product surface. By adjusting the surface control points through surface quality parameters, the surface quality and dimensional deviations of the initial reconstructed surface are adjusted, thus determining the target reconstructed surface. This target reconstructed surface achieves surface quality and dimensions consistent with the initial product surface. Finally, the feature edges and the target reconstructed surface are combined to smooth the curvature of the target reconstructed surface, thereby determining the appearance surface reconstruction data. This achieves high-precision surface reconstruction of the stamped part's appearance surface. Furthermore, applying this appearance surface reconstruction data to the stamping manufacturing process allows for the production of high-precision stamped part appearance surfaces, improving manufacturing accuracy.

[0062] As the device embodiment is basically similar to the method embodiment, the description is relatively simple, and relevant parts can be found in the description of the method embodiment.

[0063] Reference Figure 11 The present invention also provides an electronic device, including a processor 1101, a memory 1102, and a computer program stored in the memory 1102 and capable of running on the processor 1101. When the computer program is executed by the processor, it implements the steps of the stamping part appearance surface reconstruction method as described above.

[0064] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0065] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0066] Reference Figure 12 The present invention also provides a computer-readable storage medium 1201, on which a computer program is stored, and the computer program is executed by a processor to perform the stamping part appearance surface reconstruction method as described in any one of the embodiments of the present invention.

[0067] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0068] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, embodiments of the present invention can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of the present invention can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0069] Embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0070] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0071] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal equipment, causing a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0072] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0073] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0074] The foregoing has provided a detailed description of a method for reconstructing the appearance of a stamped part, a device for reconstructing the appearance of a stamped part, a process equipment, and a computer-readable storage medium provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

[0075] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. A method for reconstructing the appearance of a stamped part, characterized in that, include: In response to a command to reconstruct the appearance of a stamped part, the initial product surface data and springback compensation surface data of the stamped part are obtained. Identify the basic attribute parameters, surface quality parameters, and feature edge chord lengths of the initial product surface corresponding to the initial product surface data; The springback compensation surface corresponding to the springback compensation surface data is adjusted using the basic attribute parameters to determine the initial reconstructed surface; Determine the surface control points of the initial reconstructed surface; Adjust the surface control points based on the surface quality parameters to determine the target reconstructed surface; Construct the feature edge based on the chord length of the feature edge; By combining the feature edges and the target reconstructed surface, the appearance surface reconstruction data is determined.

2. The method according to claim 1, characterized in that, The basic attribute parameters include the initial surface order. The step of adjusting the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters to determine the initial reconstructed surface includes: Adjust the number of segments of the springback compensation surface corresponding to the springback compensation surface data to 1; Adjust the order of the springback compensation surface corresponding to the springback compensation surface data to be consistent with the order of the initial surface, and determine the initial reconstructed surface.

3. The method according to claim 1, characterized in that, The surface quality parameters include initial surface shape parameters and initial surface size parameters. The step of adjusting the surface control points based on the surface quality parameters to determine the target reconstructed surface includes: Surface matching is performed on the surface control points based on the initial surface shape parameters; Based on the initial surface size parameters, the surface control points are approximated to determine the target reconstructed surface.

4. The method according to claim 1, characterized in that, The step of constructing the feature edge based on the chord length of the feature edge includes: Construct a feature edge with the same length as the chord of the feature edge.

5. The method according to claim 1, characterized in that, Also includes: Obtain the mold product parameters of the stamping part, the mold product parameters including mold surface parameters; The mold surface parameters are replaced with the appearance surface reconstruction data to update the mold product parameters.

6. The method according to claim 5, characterized in that, Also includes: Perform full-process springback analysis on the updated mold product parameters to generate reconstruction verification information.

7. The method according to claim 6, characterized in that, Also includes: If the reconstruction verification information indicates that the reconstruction verification has failed, the step of adjusting the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters and determining the initial reconstruction surface is performed until the reconstruction verification information indicates that the reconstruction verification has succeeded.

8. A device for reconstructing the appearance of a stamped part, characterized in that, include: The acquisition module is used to acquire the initial product surface data and springback compensation surface data of the stamped part in response to the surface reconstruction command for the stamped part. The identification module is used to identify the basic attribute parameters, surface quality parameters, and feature edge chord lengths of the initial product surface corresponding to the initial product surface data; The first adjustment module is used to adjust the springback compensation surface corresponding to the springback compensation surface data using the basic attribute parameters, and to determine the initial reconstructed surface. The determination module is used to determine the surface control points of the initial reconstructed surface; The second adjustment module is used to adjust the surface control points based on the surface quality parameters to determine the target reconstructed surface. A construction module is used to construct a feature edge based on the chord length of the feature edge; The module is used to combine the feature edges and the target reconstructed surface to determine the appearance surface reconstruction data.

9. A process equipment, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, it implements the steps of the stamping part appearance surface reconstruction determination method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the steps of the stamping part appearance surface reconstruction method as described in any one of claims 1-7.

Images