Design method, device, equipment and storage medium for mounting base plate of forging trimming tool block

Abstract

This invention relates to the field of mold design technology. It discloses a method, apparatus, equipment, and storage medium for designing a mounting base plate for a forging trimming cutter block. The method includes acquiring the cutting edge entity of the forging trimming cutter block and the shape entity of the base plate to construct a basic entity; constructing a local coordinate system for the trimming cutter block based on the basic entity; performing surface filtering on the basic entity based on the local coordinate system to obtain the cutting edge surface and the target surface, and identifying the set of internal lines of the cutting edge based on the cutting edge surface and the target surface; constructing a closed boundary line of the base plate surface based on the set of internal lines of the cutting edge; generating an auxiliary surface of the mounting base plate surface based on the closed boundary line; creating an extruded body based on the target surface, and then replacing the lower surface of the extruded body with the auxiliary surface of the mounting base plate surface to obtain an auxiliary entity of the base plate; merging the auxiliary entity of the base plate with the basic entity to obtain a complete forging trimming cutter block entity with the mounting base plate. This invention achieves standardization in the design of mounting base plates for forging trimming cutter blocks by constructing a standardized design process.

Description

Technical Field

[0001] This invention relates to the field of mold design technology, and in particular to a design method, device, equipment and storage medium for a mounting base plate for a forging trimming tool block. Background Technology

[0002] In the automotive body panel trimming die manufacturing industry, the forging trimming cutter block mounting base plate is the core load-bearing component of the trimming die, and its design directly affects the die's precision, lifespan, and production safety. Generally, the cutter block mounting base plate structure design needs to precisely match various trimming inserts and strictly match the complex three-dimensional curved surface of the pressure surface or workpiece shape. However, at present, the design of the base plate mainly relies on manual design methods. Engineers need to rely on experience to complete a series of tedious steps such as flat plate stretching, insert determination, curve extraction, and Boolean operations, which restricts the standardization of the design process, resulting in low design efficiency and poor quality stability, making it difficult to quickly respond to production needs. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, the present invention aims to provide a design method, device, equipment, and storage medium for a forging trimming tool block mounting base plate. This invention generates a forging trimming tool block with a mounting base plate by constructing a standardized design process that includes datum establishment, feature recognition, boundary construction, surface generation, solid modeling, and compliance merging. This solves the problems of low design efficiency and poor quality stability caused by reliance on manual experience in existing technologies, and achieves standardization in the design of trimming tool block mounting base plates. This significantly improves design efficiency and effectively ensures design accuracy and quality stability.

[0004] The first aspect of this invention provides a method for designing a mounting base plate for a forging trimming cutter block. The method includes the following steps: obtaining the cutting edge entity of the forging trimming cutter block and the shape entity of the base plate to construct a basic entity, and constructing a local coordinate system for the trimming cutter block based on the basic entity; performing surface filtering on the basic entity based on the local coordinate system to obtain the cutting edge surface and the target surface, and identifying the set of internal lines of the cutting edge based on the cutting edge surface and the target surface; constructing a closed boundary line of the base plate surface based on the set of internal lines of the cutting edge; generating an auxiliary surface of the mounting base plate surface based on the closed boundary line; creating a stretched body based on the target surface, and then replacing the lower surface of the stretched body with the auxiliary surface of the mounting base plate surface to obtain an auxiliary entity of the base plate; merging the auxiliary entity of the base plate with the basic entity to obtain a complete forging trimming cutter block entity with the mounting base plate.

[0005] Optionally, in a first implementation of the first aspect of the present invention, the step of obtaining the forging trimming cutter block cutting edge entity and the base plate shape entity to construct a basic entity, and constructing a local coordinate system for the trimming cutter block based on the basic entity includes: obtaining the forging trimming cutter block cutting edge entity and the base plate shape entity, and merging the forging trimming cutter block cutting edge entity and the base plate shape entity into a basic entity; calculating the global envelope of the basic entity in the global coordinate system; traversing all surfaces of the basic entity, and filtering based on the global envelope to obtain a reference plane; and constructing a local coordinate system for the trimming cutter block based on the reference plane.

[0006] Optionally, in a second implementation of the first aspect of the present invention, the step of filtering the basic entity based on the local coordinate system to obtain the cutting edge surface and the target surface, and identifying the set of internal lines of the cutting edge based on the cutting edge surface and the target surface, includes: calculating the local envelope of the basic entity in the local coordinate system; traversing all surfaces of the basic entity and filtering based on the local envelope to obtain the cutting edge surface; filtering the target surface from all adjacent surfaces of the cutting edge surface; filtering the internal lines of the cutting edge from all edges of the target surface; and summarizing all curves tangent to the internal lines of the cutting edge into a set of internal lines of the cutting edge.

[0007] Optionally, in a third implementation of the first aspect of the present invention, the construction of the closed boundary line of the base plate surface based on the set of internal cutting edge lines includes: selecting the bottom surface of the trimming tool block from the basic entity and extracting all edges of the bottom surface of the trimming tool block as an initial boundary line set; traversing the two-dimensional distance from the midpoint of each edge in the initial boundary line set to the trimming line, and removing the edges whose two-dimensional distance is equal to a preset tool block back retraction amount from the initial boundary line set to obtain a preliminary selected boundary line set; projecting all curves in the set of internal cutting edge lines onto the target surface to obtain a projection curve; updating the endpoint coordinates of the preliminary selected boundary line set based on the projection curve to obtain the closed boundary line of the base plate surface.

[0008] Optionally, in a fourth implementation of the first aspect of the present invention, generating the auxiliary surface of the mounting base plate based on the closed boundary line includes: modeling with the closed boundary line as the input boundary based on a preset N-sided surface modeling method to obtain the auxiliary surface of the mounting base plate.

[0009] Optionally, in a fifth implementation of the first aspect of the present invention, the step of creating a stretched body based on the target surface and then replacing the lower surface of the stretched body with an auxiliary surface of the mounting base plate to obtain a base plate auxiliary entity includes: stretching the target surface along the negative Z-axis of the local coordinate system by a preset length to form a stretched body; and replacing the lower surface of the stretched body with an auxiliary surface of the base plate to obtain a base plate auxiliary entity.

[0010] Optionally, in a sixth implementation of the first aspect of the present invention, the step of merging the base plate auxiliary entity and the base entity to obtain a complete forging trimming tool block entity with a mounting base plate includes: determining whether there is interference between the base plate auxiliary entity and the base entity; if there is no interference, then using the target surface of the base entity and the upper surface of the base plate auxiliary entity as contact surfaces, merging the base plate auxiliary entity and the base entity to obtain a complete forging trimming tool block entity with a mounting base plate.

[0011] A second aspect of the present invention provides a design device for a mounting base plate of a forging trimming cutter block, comprising: a coordinate construction module for acquiring the cutting edge entity of the forging trimming cutter block and the shape entity of the base plate to construct a basic entity, and constructing a local coordinate system of the trimming cutter block based on the basic entity; a cutting edge identification module for performing surface screening on the basic entity based on the local coordinate system to obtain a cutting edge surface and a target surface, and identifying a set of internal lines of the cutting edge based on the cutting edge surface and the target surface; a boundary construction module for constructing a closed boundary line of the base plate surface based on the set of internal lines of the cutting edge; a surface generation module for generating an auxiliary surface of the mounting base plate surface based on the closed boundary line; a solid generation module for creating a stretched body based on the target surface, and then replacing the lower surface of the stretched body with the auxiliary surface of the mounting base plate surface to obtain a base plate auxiliary entity; and a solid merging module for merging the base plate auxiliary entity with the basic entity to obtain a complete forging trimming cutter block entity with a mounting base plate.

[0012] A third aspect of the present invention provides a design device for a forging trimming tool block mounting base plate, the design device comprising: a memory and at least one processor, the memory storing instructions; at least one processor calling the instructions in the memory to cause the computer device to execute each step of the forging trimming tool block mounting base plate design method described above.

[0013] A fourth aspect of the present invention provides a computer-readable storage medium storing instructions that, when executed by a processor, implement the various steps of the forging trimming tool block mounting base plate design method described above.

[0014] In the technical solution of this invention, a basic entity is first acquired and a local coordinate system is constructed to provide a benchmark for subsequent design. Then, based on the local coordinate system, the cutting edge surface and target surface are screened, and the set of internal lines of the cutting edge is identified, achieving accurate extraction of key features. Next, a closed boundary line is constructed using the internal lines of the cutting edge to generate an auxiliary surface of the mounting base plate, ensuring accurate matching between the base plate surface and the three-dimensional curved surface. Subsequently, an extruded body is created based on the target surface and the lower surface is replaced to obtain the auxiliary entity of the base plate, ensuring the rationality and adaptability of the base plate structure. Finally, the final product is obtained through entity merging. This invention generates a forging trimming tool block with a mounting base plate by constructing a standardized design process that includes benchmark establishment, feature recognition, boundary construction, surface generation, entity modeling, and compliance merging. This solves the problems of low design efficiency and poor quality stability caused by reliance on manual experience in the prior art, and realizes the standardization of the design of the mounting base plate for the forging trimming tool block. This not only greatly improves design efficiency but also effectively ensures design accuracy and quality stability. Attached Figure Description

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a first flowchart of the design method for the mounting base plate of the forging trimming tool block provided in the embodiment of the present invention;

[0017] Figure 2 This is a second flowchart of the design method for the mounting base plate of the forging trimming tool block provided in the embodiment of the present invention;

[0018] Figure 3 This is a third flowchart of the design method for the mounting base plate of the forging trimming tool block provided in the embodiments of the present invention;

[0019] Figure 4 This is a fourth flowchart of the design method for the mounting base plate of the forging trimming tool block provided in the embodiments of the present invention;

[0020] Figure 5 This is a fifth flowchart of the design method for the mounting base plate of the forging trimming tool block provided in the embodiments of the present invention;

[0021] Figure 6 This is a sixth flowchart of the design method for the mounting base plate of the forging trimming tool block provided in the embodiments of the present invention;

[0022] Figure 7 This is the seventh flowchart of the design method for the mounting base plate of the forging trimming tool block provided in the embodiments of the present invention;

[0023] Figure 8 This is a schematic diagram of the structure of the forging trimming tool block mounting base plate design device provided in an embodiment of the present invention;

[0024] Figure 9 A schematic diagram of the structure of the forging trimming tool block mounting base plate design equipment provided in an embodiment of the present invention. Detailed Implementation

[0025] This invention provides a design method, apparatus, equipment, and storage medium for a forging trimming tool block mounting base plate. By constructing a standardized design process that includes datum establishment, feature recognition, boundary construction, surface generation, solid modeling, and compliance merging, it generates a forging trimming tool block with a mounting base plate. This solves the problems of low design efficiency and poor quality stability caused by reliance on manual experience in the prior art, and realizes the standardization of forging trimming tool block mounting base plate design, which not only greatly improves design efficiency but also effectively ensures design accuracy and quality stability.

[0026] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" or "having" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] For ease of understanding, the specific process of the embodiments of the present invention is described below. Please refer to [link / reference]. Figure 1 One embodiment of the design method for the mounting base plate of the forging trimming tool block in this invention includes:

[0028] The design method for the mounting base plate of the forging trimming tool block includes the following steps:

[0029] 101. Obtain the solid of the cutting edge of the forging trimming tool block and the solid of the base plate to construct the basic solid, and construct the local coordinate system of the trimming tool block based on the basic solid;

[0030] In this embodiment, the forging trimming tool block cutting edge entity and the base plate shape entity are first imported and merged into a base entity. Then, the envelope of the base entity in the global coordinate system is calculated. By traversing the surface of the entity, a reference plane that meets the requirements of the Z-axis height and normal of the global coordinate system is selected. Finally, the orthogonal axis system and the origin are determined on the reference plane to complete the construction of the local coordinate system.

[0031] 102. Based on the local coordinate system, perform surface filtering on the basic entity to obtain the cutting edge surface and the target surface, and identify the set of internal lines of the cutting edge based on the cutting edge surface and the target surface;

[0032] In this embodiment, the envelope of the basic entity in the local coordinate system is first calculated, and the cutting edge surfaces with the Z-axis height meeting the standard and the normal vector being approximately opposite to the positive direction of the Z-axis in the local coordinate system are selected. Then, the target surfaces whose normal vectors are not perpendicular to the Z-axis of the local coordinate system are selected from the adjacent surfaces of the cutting edge surfaces. Next, the edges of the target surfaces are extracted and the internal lines of the cutting edge with the largest two-dimensional distance from the midpoint to the trimming line are selected. Finally, all curves tangent to it are summarized to form a set of internal lines of the cutting edge.

[0033] 103. Construct the closed boundary line of the base plate surface based on the set of internal lines of the cutting edge;

[0034] In this embodiment, the bottom surface of the trimming tool block is first selected and its edges are extracted as the initial boundary line set. The edges whose distance from the midpoint to the trimming line is equal to the retraction amount are removed to obtain the preliminary selection set. Then, the set of internal lines of the cutting edge is projected onto the target surface to obtain the projection curve. The endpoint coordinates of the preliminary selection set are updated according to the projection curve and the height of the non-intersection endpoints is unified, and finally the closed boundary line of the base plate surface is formed.

[0035] 104. Generate auxiliary surfaces for the mounting base plate based on closed boundary lines;

[0036] In this embodiment, the N-sided surface modeling method is used, and the closed boundary line of the already constructed base plate surface is used as the input boundary to generate a closed and smooth surface, which is the auxiliary surface of the mounting base plate surface.

[0037] 105. Create an extruded body based on the target surface, and then replace the lower surface of the extruded body with the auxiliary surface of the mounting base plate to obtain the base plate auxiliary entity;

[0038] In this embodiment, the target surface is stretched by a preset length along the negative direction of the local coordinate system Z-axis to form a stretched body. Then, the temporary lower surface of the stretched body is replaced with the auxiliary surface of the mounting base plate to ensure that the curved surface after replacement is seamlessly connected with the side of the stretched body, thereby obtaining the base plate auxiliary entity.

[0039] 106. Merge the base plate auxiliary entity with the base entity to obtain a complete forging trimming tool block entity with mounting base plate;

[0040] In this embodiment, the spatial interference between the base plate auxiliary entity and the base entity is first detected. If there is no interference, the target surface of the base entity and the upper surface of the base plate auxiliary entity are used as the contact surface, and the entity merging operation is performed to finally obtain the trimming knife block mounting base plate.

[0041] In this embodiment of the invention, a basic entity is first acquired and a local coordinate system is constructed to provide a benchmark for subsequent design. Then, based on the local coordinate system, the cutting edge surface and target surface are screened, and the set of internal lines of the cutting edge is identified, achieving accurate extraction of key features. Next, closed boundary lines are constructed using the internal lines of the cutting edge to generate auxiliary surfaces on the mounting base plate, ensuring accurate matching between the base plate surface and the three-dimensional curved surface. Subsequently, an extruded body is created based on the target surface and the lower surface is replaced to obtain auxiliary entities for the base plate, ensuring the rationality and adaptability of the base plate structure. Finally, the final product is obtained through entity merging. This invention, by constructing a standardized design process including benchmark establishment, feature recognition, boundary construction, surface generation, entity modeling, and compliance merging, generates forging trimming tool blocks with mounting base plates. This solves the problems of low design efficiency and poor quality stability caused by reliance on manual experience in existing technologies, achieving standardization in the design of mounting base plates for forging trimming tool blocks. This significantly improves design efficiency and effectively ensures design accuracy and quality stability.

[0042] Please see Figure 2 Two embodiments of the forging trimming tool block mounting base plate design method in this invention include step 101, which includes:

[0043] 201. Obtain the solid entity of the forging trimming blade and the solid entity of the base plate, and merge the solid entity of the forging trimming blade and the solid entity of the base plate into the base entity;

[0044] In this embodiment, the pre-drawn solid models of the forging trimming cutter block's cutting edge and the base plate shape are first imported using 3D modeling software (such as UG). The forging trimming cutter block's cutting edge solid model must include the complete cutting edge, mounting and positioning surfaces, and other core functional structures. The base plate shape solid model is a preliminary flat blank model, possessing only the basic outline. Subsequently, a solid merging operation is performed to combine the two solids into a single entity, which is then designated as the base entity. During the merging process, it is essential to ensure that there is no spatial interference between the two entities, and that the positioning datum of the trimming cutter block's cutting edge entity is aligned with the datum reserved area of ​​the base plate shape solid model. The advantage of this step is that it integrates the scattered components into a unified design object, providing a complete carrier for subsequent geometric analysis in the global coordinate system and avoiding the coordinate deviation problem of independent analysis of multiple entities.

[0045] 202. Calculate the global envelope of the basic entity in the global coordinate system;

[0046] In this embodiment, by traversing the coordinate values ​​of all vertices of the entity, the boundary extrema along each axis are extracted, and the global envelope of the basic entity in the global coordinate system (XYZ) is calculated. Its mathematical expression is as follows:

[0047] ;

[0048] in, and These are the minimum and maximum values ​​of the basic entity in the X-axis direction of the global coordinate system, respectively; and These are the minimum and maximum values ​​of the basic entity in the Y-axis direction of the global coordinate system, respectively; and These are the minimum and maximum values ​​of the basic entity in the Z-axis direction of the global coordinate system, respectively. This step is mainly to clarify the overall spatial range of the basic entity, provide a quantitative geometric basis for the subsequent selection of reference planes, and avoid the subjective error of manually selecting reference planes.

[0049] 203. Traverse all surfaces of the base entity and filter them based on the global envelope to obtain the reference plane;

[0050] In this embodiment, firstly, all surfaces of the base entity are traversed. Then, for each surface, if the surface... (That is, the maximum value of the surface's Z-axis direction is consistent with the maximum value of the Z-axis of the global envelope of the base entity), and the normal vector of this surface. If a surface forms an acute angle with the Z-axis of the global coordinate system, it is determined to be a reference plane. The reason for this selection logic is that the largest surface in the Z-axis direction is the top bearing surface of the entity. Its normal forms an acute angle with the Z-axis, which can ensure that the surface is a flat positioning reference, which meets the installation bearing requirements of the stamping die base plate. Compared with manual selection of reference surfaces, this method has a quantitative judgment standard, which can improve the consistency and accuracy of reference surface selection.

[0051] 204. Construct a local coordinate system for the trimming tool block based on the reference plane;

[0052] In this embodiment, on the selected reference plane, two mutually perpendicular vectors are first selected, denoted as follows: and We take these as the X and Y axes of the local coordinate system, and then combine them with the normal vector of the reference plane. This is used as the Z-axis direction of the local coordinate system to form an orthogonal axis system. Then, any feature point on the reference plane (such as the geometric center point of the reference plane or the center point of the preset positioning hole) is selected as the origin of the local coordinate system, thus completing the construction of the local coordinate system of the trimming tool block. This step is based on the geometric orthogonality of the reference plane to establish a local coordinate system. Its advantage is that it provides a precise local analysis benchmark for the subsequent selection of the cutting edge surface and target surface, which can eliminate the coordinate conversion error caused by the complex curved surface under the global coordinate system. At the same time, the local coordinate system is aligned with the functional structure of the trimming tool block, which can improve the targeting and accuracy of subsequent feature recognition.

[0053] Please see Figure 3 In the three embodiments of the forging trimming tool block mounting base plate design method of the present invention, step 102 includes:

[0054] 301. Calculate the local envelope of the basic entity in the local coordinate system;

[0055] In this embodiment, by traversing the coordinate values ​​of all vertices of the entity, the boundary extrema along each axis are extracted, and the local envelope of the basic entity in the local coordinate system is calculated. By limiting the space of the local coordinate system, the interference of irrelevant regions in the global coordinate system is eliminated, providing a precise local spatial range for the subsequent selection of the cutting edge surface.

[0056] 302. Traverse all surfaces of the base entity and filter based on the local envelope to obtain the cutting edge surface;

[0057] In this embodiment, all surfaces of the base entity are traversed first, and the surface envelope of each surface (denoted as the i-th surface) in the local coordinate system is calculated:

[0058] ;

[0059] Then set dual screening conditions: one is the surface's... (i.e., the maximum value of the surface along the Z-axis is consistent with the maximum value of the local envelope of the base entity along the Z-axis), and secondly, the normal vector of the surface. The surface that meets the conditions approximately opposite to the positive direction of the local coordinate system Z-axis is the cutting edge surface. The reason for this selection logic is that the cutting edge surface, as the core cutting surface of the trimming tool block, is located in the highest region of the solid Z-axis and its normal direction is towards the cutting direction. This quantitative judgment standard can replace manual experience in identification and avoid misjudgment of the cutting edge surface.

[0060] 303. Select the target face from all adjacent faces of the cutting edge face;

[0061] In this embodiment, all adjacent faces of the cutting edge (i.e., faces sharing an edge with the cutting edge and whose distance is zero) are obtained, and then the normal vector of each adjacent face is determined: if the normal vector of the adjacent face is... If it is not perpendicular to the Z-axis of the local coordinate system, it is determined to be the target surface. The design basis of this step is that the target surface, as the carrier of the internal lines of the cutting edge, needs to have a certain tilt angle to adapt to the transition structure of the cutting edge. Excluding the plane perpendicular to the Z-axis can ensure that the internal lines of the cutting edge extracted later have the correct geometric shape, and provide an accurate curve reference for the construction of the base plate boundary.

[0062] 304. Filter out the internal lines of the cutting edge from all edges of the target surface;

[0063] In this embodiment, all boundary edges of the target surface are first extracted, and then the two-dimensional distance between the midpoint coordinates of each edge and the trimming line in the local coordinate system XOY plane is calculated. The edge with the largest two-dimensional distance is selected as the internal line of the cutting edge. The reason for selecting the edge with the largest two-dimensional distance as the internal line of the cutting edge is that this edge is the feature edge on the target surface that is farthest from the cutting area. Its shape directly determines the boundary range of the mounting base plate, which can ensure that the assembly gap between the base plate and the cutting edge meets the mold design requirements.

[0064] 305. Summarize all curves tangent to the internal lines of the cutting edge into a set of internal lines of the cutting edge;

[0065] In this embodiment, the internal line of the cutting edge is actually a continuous contour composed of multiple tangent curves. Extracting only a single edge cannot cover the complete boundary. To avoid missing curves, the surface curvature analysis function is used to identify all curves that are tangent to the internal line of the cutting edge (including continuous tangent edges on the target surface and extended tangent curves of adjacent surfaces). Then, the internal line of the cutting edge and these tangent curves are topologically integrated to form a complete set of internal lines of the cutting edge. The integrated set of curves can ensure the integrity of the subsequent closed boundary line of the base plate and avoid gaps or redundancy in the base plate structure.

[0066] Please see Figure 4 In the four embodiments of the forging trimming tool block mounting base plate design method of the present invention, step 103 includes:

[0067] 401. Select the bottom surface of the trimming blade block from the basic entity, and extract all the edges of the bottom surface of the trimming blade block as the initial boundary line set;

[0068] In this embodiment, firstly, based on the local coordinate system constructed in step 204, all surfaces of the basic entity are traversed, and a filtering condition is set: if the normal vector of a certain surface is completely consistent with the positive direction of the Z-axis of the local coordinate system, then the surface is determined to be the bottom surface of the trimming block; the basis of this filtering logic is that the bottom surface of the trimming block must be a horizontal bearing surface, and its normal vector being consistent with the positive direction of the Z-axis can ensure the consistency of the reference for subsequent boundary extraction; after filtering, all contour edges of the bottom surface of the trimming block are extracted, and these edges are integrated into an initial boundary line set. During the extraction process, the topological connection relationship of each edge must be preserved to avoid isolated edges, providing a complete initial contour carrier for subsequent boundary filtering and optimization.

[0069] 402. Traverse the two-dimensional distance from the midpoint of each edge in the initial boundary line set to the trimming line, and remove the edges whose two-dimensional distance is equal to the preset back retraction amount of the tool block from the initial boundary line set to obtain the preliminary filtered boundary line set.

[0070] In this embodiment, the two-dimensional projection baseline of the trimming line on the local coordinate system XOY plane is first retrieved. Then, each edge in the initial boundary line set is traversed, and the two-dimensional distance from the midpoint of each edge to the baseline is calculated. Subsequently, the back retraction amount of the tool block is set (this parameter is determined by the mold assembly process). If the two-dimensional distance from the midpoint of an edge to the baseline is equal to the back retraction amount of the tool block, then the edge is determined to be a redundant boundary of the tool block back and needs to be removed from the initial boundary line set. After the removal is completed, the remaining initial boundary line set is the preliminary screening boundary line set. This step can effectively remove boundaries that are not related to the trimming function, narrow the scope of subsequent boundary optimization, and improve design accuracy.

[0071] 403. Project all curves in the set of lines inside the cutting edge onto the target surface to obtain the projected curve;

[0072] In this embodiment, based on the set of internal lines of the cutting edge (containing multiple tangent curves) obtained in step 305, all curves in the set are vertically projected onto the target surface determined in step 303 along the Z-axis of the local coordinate system to form projection curves (the number of curves corresponds one-to-one with the lines in the set of internal lines of the cutting edge). During the projection process, the geometric continuity of the curves must be maintained to ensure that the curvature and inflection points of the projected curves are consistent with those of the original internal lines of the cutting edge. This operation transforms the three-dimensional feature curves of the cutting edge into two-dimensional baselines on the target surface, providing a matching basis for the subsequent intersection calibration of boundary lines.

[0073] 404. Update the endpoint coordinates of the preliminary selected boundary line set based on the projection curve to obtain the closed boundary line of the base plate surface;

[0074] In this embodiment, the spatial intersection points of each edge and the projection curve in the preliminary selection of boundary lines are first traversed. If an edge intersects with the projection curve, the coordinates of the endpoint closest to the intersection point are updated to the three-dimensional coordinates of the intersection point. Next, the Z-axis height values ​​of all intersection points in the local coordinate system are counted, and the maximum value is extracted. The Z-axis heights of the non-connected endpoints of the edges in the boundary line set that do not intersect with the projection curve are uniformly adjusted to the maximum value to ensure that the endpoints of all boundary lines are in the same height plane. Finally, the boundary lines after coordinate updates are topologically closed to fill in the missing connection segments and form closed boundary lines without gaps or overlaps. This step, through intersection point calibration and height unification, ensures the accurate adaptation between the base plate boundary and the internal lines of the cutting edge, and achieves the closure of the boundary, providing a complete and accurate contour reference for subsequent modeling of the base plate surface.

[0075] Please see Figure 5 Five embodiments of the forging trimming tool block mounting base plate design method in this invention include step 104, which includes:

[0076] 501. Based on the preset N-sided surface modeling method, the closed boundary line is used as the input boundary for modeling to obtain the auxiliary surface of the mounting base plate.

[0077] In this embodiment, the closed boundary line obtained in step 404 is first confirmed. This boundary line is the contour reference of the mounting base plate surface, and its geometric shape directly determines the adaptability of the base plate surface. Then, the preset N-sided surface modeling method (such as the N-sided surface modeling module of the 3D modeling software UG) uses the closed boundary line as the input boundary for modeling to obtain the auxiliary surface of the mounting base plate surface. The core principle of N-sided surface modeling is to generate a seamless continuous surface by fitting the entire domain of the closed boundary line. Compared with the traditional multi-surface splicing method, its advantage is that it can avoid the mold stress concentration problem caused by splicing seams. The auxiliary surface of the mounting base plate surface not only completely fits the closed contour of the closed boundary line, but also has a three-dimensional surface shape that is compatible with the trimming blade and other parts of the mold. It provides an accurate surface reference for the subsequent construction of the base plate auxiliary entity, and also solves the technical pain points of poor surface fit and easy interference in traditional manual modeling.

[0078] Please see Figure 6 The six embodiments of the forging trimming tool block mounting base plate design method in this invention include step 105, which includes:

[0079] 601. Stretch the target surface along the negative Z-axis of the local coordinate system by a preset length to form a stretched body;

[0080] In this embodiment, firstly, the target surface selected in step 303 (as the stretching reference surface) and the local coordinate system of the trimming tool block constructed in step 204 are confirmed, and the stretching direction is determined to be the negative Z-axis direction of the local coordinate system (opposite to the normal direction of the target surface, ensuring that the stretched body extends towards the tool block mounting side); then, according to the process requirements of the base plate thickness of the mold design, the preset stretching length is set (this length needs to be determined in conjunction with the overall assembly space of the mold); then, with the target surface as the sketch outline surface, the stretching operation is performed along the negative Z-axis direction of the local coordinate system to generate the stretched body; during the stretching process, the geometric shape of the target surface must remain unchanged, and the side of the stretched body is perpendicular to the boundary line of the target surface.

[0081] 602. Replace the lower surface of the stretched body with the auxiliary surface of the base plate to obtain the base plate auxiliary solid;

[0082] In this embodiment, the auxiliary surface of the mounting base plate generated in step 501 (which has a complex three-dimensional curved surface shape that is compatible with other parts of the mold) is retrieved first. Then, the temporary lower surface of the stretched body (the flat bottom surface generated by stretching) is selected and replaced with the auxiliary surface. During the replacement process, surface continuity verification needs to be enabled to ensure that the auxiliary surface and the side of the stretched body are tangent and continuous (without obvious sharp corners to avoid stress concentration during mold assembly). At the same time, it is ensured that the geometric center of the auxiliary surface after replacement is aligned with the reference center of the stretched body. After the replacement is completed, an integrated base plate auxiliary entity is obtained, with its top being the mating surface that coincides with the target surface and its bottom being the auxiliary surface. This step achieves precise forming of the outer surface of the base plate through surface replacement. Compared with traditional multi-step trimming and Boolean operations, it greatly improves the forming efficiency and accuracy of the base plate surface and avoids the surface interference problem that is easy to occur in manual shaping.

[0083] Please see Figure 7 The seven embodiments of the forging trimming tool block mounting base plate design method in this invention include step 106, which includes:

[0084] 701. Determine whether there is interference between the base plate auxiliary entity and the foundation entity;

[0085] In this embodiment, the basic entity obtained in step 201 and the base plate auxiliary entity generated in step 602 are first retrieved for entity interference detection. A spatial topological intersection algorithm is used to traverse all three-dimensional mesh units of the two entities to detect whether there are areas of overlapping spatial coordinates. During the detection process, an interference judgment threshold needs to be set. If an interference area is detected, the coordinates and geometry of the interference part are located, and an interference report is output, prompting that it is necessary to return to step 601 to adjust the length of the stretched body or step 602 to optimize the surface shape of the auxiliary surface until the interference is eliminated. If no interference area is detected, it is determined that there is no conflict in the spatial position of the two entities, and the subsequent merging process can proceed. This step uses quantitative spatial topological analysis to replace manual experience judgment, avoids structural conflicts in the merged entities, and ensures the feasibility of subsequent mold assembly.

[0086] 702. If there is no interference, the target surface of the base entity and the upper surface of the base plate auxiliary entity are used as the contact surface. The base plate auxiliary entity and the base entity are merged to obtain a complete forging trimming tool block entity with mounting base plate.

[0087] In this embodiment, the target surface obtained from step 303 on the basic entity and the upper surface of the base plate auxiliary entity are first identified. Then, using the target surface and the upper surface of the base plate auxiliary entity as the fusion reference, the two entities are integrated into a single structure. During the merging process, the continuity of the curved surfaces of the contact surfaces must be maintained to avoid splicing sharp corners. After the merging is completed, the geometric integrity of the overall entity must be checked to confirm that there are no missing surfaces, no overhangs, and no redundant structures. Finally, a stable and adaptable trimming blade mounting base plate is obtained. This step, through precise contact surface positioning and merging, not only ensures the connection strength between the blade and the base plate, but also preserves the functional form of the outer surface S0 of the base plate, solving the problems of misalignment and weak structure that are prone to occur in traditional manual merging.

[0088] The forged trimming tool block mounting base plate design method in the embodiments of the present invention has been described above. The forged trimming tool block mounting base plate design device in the embodiments of the present invention is described below. Please refer to [link / reference]. Figure 8 One embodiment of the forging trimming tool block mounting base plate design device of the present invention includes:

[0089] The coordinate construction module 801 is used to obtain the cutting edge entity and the base plate shape entity of the forging trimming tool block to construct the basic entity, and to construct the local coordinate system of the trimming tool block based on the basic entity;

[0090] The cutting edge recognition module 802 performs surface filtering on the basic entity based on the local coordinate system to obtain the cutting edge surface and the target surface, and identifies the set of internal lines of the cutting edge based on the cutting edge surface and the target surface;

[0091] Boundary construction module 803 constructs a closed boundary line on the surface of the base plate based on the set of internal lines of the cutting edge;

[0092] Surface generation module 804 generates auxiliary surfaces for the mounting base plate based on closed boundary lines;

[0093] The solid generation module 805 creates an extruded body based on the target surface, and then replaces the lower surface of the extruded body with the auxiliary surface of the mounting base plate to obtain the base plate auxiliary solid.

[0094] The entity merging module 806 merges the base plate auxiliary entity with the base entity to obtain a complete forging trimming tool block entity with the mounting base plate.

[0095] In this embodiment, the coordinate construction module 801 first obtains the basic entity and constructs a local coordinate system to provide a reference for subsequent design. Then, the cutting edge recognition module 802 filters the cutting edge surface and target surface based on the local coordinate system and identifies the set of internal lines of the cutting edge, realizing the accurate extraction of key features. The boundary construction module 803 constructs a closed boundary line through the internal lines of the cutting edge, and the surface generation module 804 generates an auxiliary surface of the mounting base plate based on the closed boundary line, ensuring the accurate matching between the base plate surface and the three-dimensional curved surface. Subsequently, the entity generation module 805 creates an extruded body based on the target surface and replaces the lower surface to obtain the auxiliary entity of the base plate, ensuring the rationality and adaptability of the base plate structure. Finally, the entity merging module 806 merges the entities to obtain the final product. This invention generates a forging trimming tool block with a mounting base plate by constructing a standardized design process that includes reference establishment, feature recognition, boundary construction, surface generation, entity modeling, and compliance merging. This solves the problems of low design efficiency and poor quality stability caused by reliance on manual experience in the prior art, realizes the standardization of the design of the trimming tool block mounting base plate, which not only greatly improves design efficiency but also effectively ensures design accuracy and quality stability.

[0096] Figure 9 This is a schematic diagram of a forging trimming cutter block mounting base plate design device 900 provided in an embodiment of the present invention. The forging trimming cutter block mounting base plate design device 900 can vary significantly due to different configurations or performance. It may include one or more central processing units (CPUs) 910 (e.g., one or more processors) and a memory 920, and one or more storage media 930 (e.g., one or more mass storage devices) storing application programs 933 or data 932. The memory 920 and storage media 930 can be temporary or persistent storage. The program stored in the storage media 930 may include one or more modules (not shown in the diagram), each module may include a series of instruction operations on the forging trimming cutter block mounting base plate design device 900. Furthermore, the processor 910 may be configured to communicate with the storage media 930 and execute the series of instruction operations in the storage media 930 on the forging trimming cutter block mounting base plate design device 900 to implement the steps of the trimming cutter block mounting base plate design method provided in the above-described method embodiments.

[0097] The forging trimming tool block mounting base plate design device 900 may also include one or more power supplies 940, one or more wired or wireless network interfaces 950, one or more input / output interfaces 960, and / or one or more operating systems 931, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, etc. Those skilled in the art will understand that... Figure 9The design structure of the forging trimming cutter block mounting base plate shown does not constitute a limitation on the design of the forging trimming cutter block mounting base plate. It may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0098] The present invention also provides a computer-readable storage medium, which can be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium, wherein the computer-readable storage medium stores instructions that, when executed on a computer, cause the computer to perform the steps of the forging trimming tool block mounting base plate design method.

[0099] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system, device, or unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0100] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0101] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method of designing a trim tool block mounting plate for a forging, characterized by, The method comprises the steps of: obtaining a blade edge entity and a bottom plate shape entity of the forging trimming tool block to construct a basic entity, and constructing a local coordinate system of the trimming tool block based on the basic entity; performing face screening on the basic entity based on the local coordinate system to obtain an edge face and a target face, and identifying an internal edge line set based on the edge face and the target face; the face screening on the basic entity based on the local coordinate system to obtain the edge face and the target face, and the identification of the internal edge line set based on the edge face and the target face comprise: calculating a local envelope of the basic entity in the local coordinate system; traversing all surfaces of the basic entity, and performing screening based on the local envelope to obtain the edge face; screening a target face from all adjacent faces of the edge face; screening an internal edge line from all edges of the target face; and collecting all curves tangent to the internal edge line as the internal edge line set; constructing a closed boundary line of the bottom plate surface based on the internal edge line set; the construction of the closed boundary line of the bottom plate surface based on the internal edge line set comprises: screening a bottom surface of the trimming tool block from the basic entity, and extracting all edges of the bottom surface of the trimming tool block as an initial boundary line set; traversing a two-dimensional distance from a midpoint of each edge in the initial boundary line set to the trimming line, and removing an edge with a two-dimensional distance equal to a preset tool block back retreat amount from the initial boundary line set to obtain a preliminary screening boundary line set; projecting all curves in the internal edge line set onto the target face to obtain projected curves; and updating end point coordinates of the preliminary screening boundary line set based on the projected curves to obtain the closed boundary line of the bottom plate surface; generating a bottom plate surface auxiliary face based on the closed boundary line; creating a stretch body with the target face as a reference, and then replacing a lower surface of the stretch body with the bottom plate surface auxiliary face to obtain a bottom plate auxiliary entity; performing entity merging on the bottom plate auxiliary entity and the basic entity to obtain a complete forging trimming tool block entity with a mounting bottom plate.

2. The design method of a trim tool block mounting plate for a forging according to claim 1, characterized by, The obtaining of the blade edge entity and the bottom plate shape entity of the forging trimming tool block to construct the basic entity, and the construction of the local coordinate system of the trimming tool block based on the basic entity comprise: obtaining the blade edge entity and the bottom plate shape entity of the forging trimming tool block, and merging the blade edge entity and the bottom plate shape entity into the basic entity; calculating a global envelope of the basic entity in a global coordinate system; traversing all surfaces of the basic entity, and performing screening based on the global envelope to obtain a reference plane; constructing the local coordinate system of the trimming tool block based on the reference plane.

3. The design method of a trim tool block mounting plate for a swage, according to claim 1, wherein, The generation of the bottom plate surface auxiliary face based on the closed boundary line comprises: modeling the closed boundary line as an input boundary based on a preset N-edge surface modeling method to obtain the bottom plate surface auxiliary face.

4. The design method of a trim tool block mounting plate for a swage, according to claim 1, wherein, The creation of the stretch body with the target face as a reference, and then the replacement of the lower surface of the stretch body with the bottom plate surface auxiliary face to obtain the bottom plate auxiliary entity comprises: stretching the target face in a negative direction of a Z axis of the local coordinate system by a preset length to form the stretch body; replacing the lower surface of the stretch body with the bottom plate surface auxiliary face to obtain the bottom plate auxiliary entity.

5. The method of claim 1, wherein, The entity merging of the bottom plate auxiliary entity and the basic entity to obtain the complete trimming tool block entity with the mounting bottom plate comprises: determining whether the base entity and the bottom plate auxiliary entity interfere with each other; if no interference exists, taking the target face of the base entity and the upper surface of the bottom plate auxiliary entity as contact faces, and performing entity merging on the base entity and the bottom plate auxiliary entity to obtain a complete trimming blade block entity with a mounting bottom plate.

6. A swage trimmer block mounting bed design apparatus, characterized by, The method comprises the following steps: a coordinate construction module is configured to obtain a trimming blade block edge entity and a bottom plate shape entity to construct a base entity, and to construct a trimming blade block local coordinate system based on the base entity; an edge recognition module is configured to perform face screening on the base entity based on the local coordinate system to obtain an edge face and a target face, and to recognize an edge internal line set based on the edge face and the target face; the face screening on the base entity based on the local coordinate system to obtain the edge face and the target face, and the recognition of the edge internal line set based on the edge face and the target face comprise the following steps: calculating a local envelope of the base entity in the local coordinate system; screening all surfaces of the base entity based on the local envelope to obtain the edge face; screening a target face from all adjacent faces of the edge face; screening an edge internal line from all edges of the target face; and collecting all curves tangent to the edge internal line into the edge internal line set; a boundary construction module is configured to construct a closed boundary line of a bottom plate surface based on the edge internal line set; the construction of the closed boundary line of the bottom plate surface based on the edge internal line set comprises the following steps: screening a trimming blade block bottom surface from the base entity, and extracting all edges of the trimming blade block bottom surface as an initial boundary line set; screening edges with a two-dimensional distance equal to a preset blade block back portion relief amount from the initial boundary line set to obtain a preliminarily screened boundary line set; projecting all curves in the edge internal line set onto the target face to obtain projected curves; and updating end point coordinates of the preliminarily screened boundary line set based on the projected curves to obtain the closed boundary line of the bottom plate surface a surface generation module is configured to generate a mounting bottom plate surface auxiliary face based on the closed boundary line; an entity generation module is configured to create a stretch body with the target face as a reference, and then replace a lower surface of the stretch body with the mounting bottom plate surface auxiliary face to obtain a bottom plate auxiliary entity; an entity merging module is configured to perform entity merging on the base entity and the bottom plate auxiliary entity to obtain a complete trimming blade block entity with a mounting bottom plate.

7. A swage trimmer block mounting bed design apparatus, characterized by, The forging trimming blade block mounting bottom plate design device comprises a memory and at least one processor, and the memory stores instructions; at least one processor calls the instructions in the memory to enable the forging trimming blade block mounting bottom plate design device to perform the steps of the forging trimming blade block mounting bottom plate design method in any one of claims 1-5.

8. A computer-readable storage medium having stored thereon instructions, the computer-readable storage medium comprising: The instructions are executed by the processor to implement the steps of the forging trimming blade block mounting bottom plate design method in any one of claims 1-5.

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