Method, device and equipment for designing forge piece trimming cutter block mounting bottom plate and storage medium

Abstract

The invention relates to the technical field of die design, and discloses a forging trimming cutter block mounting bottom plate design method, device and equipment and a storage medium, the forging trimming cutter block mounting bottom plate design method comprises the steps of obtaining a forging trimming cutter block cutting edge entity and a bottom plate shape entity to construct a basic entity, and constructing a trimming cutter block local coordinate system based on the basic entity; 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 cutting edge internal line set based on the cutting edge surface and the target surface; constructing a closed boundary line of the bottom plate surface based on the cutting edge internal line set; generating a mounting bottom plate surface auxiliary surface based on the closed boundary line; creating a stretching body by taking the target surface as a reference, and replacing the lower surface of the stretching body with the mounting bottom plate surface auxiliary surface to obtain a bottom plate auxiliary entity; the bottom plate auxiliary entity and the basic entity are combined, and a complete forge piece trimming cutter block entity with the mounting bottom plate is obtained; by constructing a standardized design process, the design standardization of the forging trimming cutter block mounting bottom plate is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mold design, and in particular to a forging trimming cutter block mounting bottom plate design method, device, equipment and storage medium. BACKGROUND

[0002] In the field of manufacturing trimming dies for automobile cover parts, the forging trimming cutter block mounting bottom plate is the core bearing component of the trimming die, and its design directly affects the precision, service life and production safety of the die; generally speaking, the structure design of the cutter block mounting bottom plate needs to be accurately matched with various trimming inserts, and strictly matched with the complex three-dimensional curved surface of the pressure curve or the workpiece shape; however, at present, the design of the bottom plate mainly relies on manual design method, and engineers need to gradually complete a series of tedious steps such as flat plate stretching, insert determination, curve extraction and Boolean operation according to experience, which restricts the standardization of the design process, resulting in low efficiency and poor quality stability of the design process, and it is difficult to quickly respond to production needs. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a forging trimming cutter block mounting bottom plate design method, device, equipment and storage medium; the present application generates a forging trimming cutter block with a mounting bottom plate by constructing a standardized design process including reference establishment, feature recognition, boundary construction, surface generation, entity modeling and compliance merging, solves the problem of low design efficiency and poor quality stability caused by relying on manual experience in the prior art, realizes the standardization of the trimming cutter block mounting bottom plate design, greatly improves the design efficiency, and effectively guarantees the design precision and quality stability.

[0004] The first aspect of the present application provides a forging trimming cutter block mounting bottom plate design method, which comprises the steps of: obtaining a forging trimming cutter block edge entity and a bottom plate shape entity to construct a basic entity, and constructing a trimming cutter block local coordinate system 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 edge internal line set based on the edge face and the target face; constructing a closed boundary line of the bottom plate surface based on the edge internal line set; generating an installation bottom plate surface auxiliary face based on the closed boundary line; creating a stretching body with the target face as a reference, and then replacing the lower surface of the stretching body with the installation 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 cutter block entity with a mounting bottom 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 form of the first aspect of the application, the step of merging the bottom plate auxiliary entity and the base entity to obtain the complete forging trimming blade block entity with the mounting bottom plate comprises: judging whether the bottom plate auxiliary entity and the base entity interfere with each other; if not, taking the target face of the base entity and the upper surface of the bottom plate auxiliary entity as contact faces, merging the bottom plate auxiliary entity and the base entity to obtain the complete forging trimming blade block entity with the mounting bottom plate.

[0011] The second aspect of the application provides a forging trimming blade block mounting bottom plate design device, comprising: a coordinate construction module, configured to obtain a trimming blade block edge entity and a bottom plate shape entity to construct a base entity, and construct a trimming blade block local coordinate system based on the base entity; an edge recognition module, 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 recognize an edge internal line set based on the edge face and the target face; a boundary construction module, configured to construct a closed boundary line of a bottom plate surface based on the edge internal line set; a surface generation module, configured to generate a mounting bottom plate surface auxiliary face based on the closed boundary line; an entity generation module, configured to create a stretch body based on the target face, 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; and an entity merging module, configured to merge the bottom plate auxiliary entity and the base entity to obtain a complete forging trimming blade block entity with the mounting bottom plate.

[0012] The third aspect of the application provides a forging trimming blade block mounting bottom plate design device, comprising: a memory and at least one processor, wherein the memory stores instructions; and the at least one processor invokes the instructions in the memory to enable the computer device to perform each step of the forging trimming blade block mounting bottom plate design method.

[0013] The fourth aspect of the application provides a computer readable storage medium, wherein the computer readable storage medium stores instructions, and the instructions are executed by a processor to implement each step of the forging trimming blade block mounting bottom plate design method.

[0014] In the technical solution of the present application, the basic entity is first obtained and a local coordinate system is constructed to provide a reference for subsequent design; then the cutting edge surface, target surface and internal line set of the cutting edge are screened and identified based on the local coordinate system, realizing accurate extraction of key features; then the closed boundary line is constructed by the internal lines of the cutting edge, and the installation bottom plate surface auxiliary surface is generated to ensure the accurate matching of the bottom plate surface and the three-dimensional curved surface; then the stretching body is created with the target surface as the reference and the lower surface is replaced to obtain the bottom plate auxiliary entity, ensuring the rationality and adaptability of the bottom plate structure; finally, the final product is obtained by merging the entities; the present application constructs a standardized design process including reference establishment, feature identification, boundary construction, surface generation, entity modeling and compliance merging to generate a forging trimming knife block with an installation bottom plate, solving the problems of low design efficiency and poor quality stability caused by relying on manual experience in the prior art, realizing the standardization of the design of the forging trimming knife block installation bottom plate, greatly improving the design efficiency, and effectively guaranteeing the design accuracy and quality stability. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which: Figure 1 The first flowchart of the forging trimming knife block installation bottom plate design method provided by the embodiment of the present application; Figure 2 The second flowchart of the forging trimming knife block installation bottom plate design method provided by the embodiment of the present application; Figure 3 The third flowchart of the forging trimming knife block installation bottom plate design method provided by the embodiment of the present application; Figure 4 The fourth flowchart of the forging trimming knife block installation bottom plate design method provided by the embodiment of the present application; Figure 5 The fifth flowchart of the forging trimming knife block installation bottom plate design method provided by the embodiment of the present application; Figure 6 The sixth flowchart of the forging trimming knife block installation bottom plate design method provided by the embodiment of the present application; Figure 7 The seventh flowchart of the forging trimming knife block installation bottom plate design method provided by the embodiment of the present application; Figure 8 The structure schematic diagram of the forging trimming knife block installation bottom plate design device provided by the embodiment of the present application; Figure 9 The structure schematic diagram of the forging trimming knife block installation bottom plate design device provided by the embodiment of the present application; DETAILED DESCRIPTION

[0016] The application provides a forging trimming cutter block mounting bottom plate design method, device, equipment and storage medium, which generates a forging trimming cutter block with a mounting bottom plate by constructing a standardized design process including reference establishment, feature identification, boundary construction, surface generation, entity modeling and compliance merging, solves the problems of low design efficiency and poor quality stability caused by relying on manual experience in the prior art, realizes the standardization of the forging trimming cutter block mounting bottom plate design, greatly improves the design efficiency, and effectively guarantees the design precision and quality stability.

[0017] The terms "first", "second", "third", "fourth" and the like in the description, claims, and drawings of the application, and those above and below (if any) are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of the terms so termed herein is only to distinguish the referenced similar applications from each other and not necessarily to delineate a specific sequential or chronological order to them. It is to be understood that the data so used in the description above and below is interchangeable under appropriate circumstances and that embodiments, unless otherwise explicitly provided, can be practiced in other than the order described. Also, the use of the terms "include", "have", "comprise" or "comprising" and any variations thereof in the description and in the claims are intended to cover both the inclusive and the exclusive aspects of the terms, such that the use of the term "include" or "comprise" or "comprising" in the description and in the claims does not exclude the presence of other steps or elements that are not specifically recited.

[0018] For the convenience of understanding, the specific flow of the embodiments of the application is described below. Please refer to Figure 1 One embodiment of the forging trimming cutter block mounting bottom plate design method in the embodiments of the application includes: The forging trimming cutter block mounting bottom plate design method includes the following steps: 101, obtaining a forging trimming cutter block edge entity and a bottom plate shape entity to construct a basic entity, and constructing a trimming cutter block local coordinate system based on the basic entity; In this embodiment, the forging trimming cutter block edge entity and the bottom plate shape entity are imported first and then merged into a basic entity, then the envelope of the basic entity in the global coordinate system is calculated, the reference plane meeting the height and normal requirements of the Z-axis of the global coordinate system is screened out by traversing the entity surface, and finally the orthogonal axis system and the origin on the reference plane are determined to complete the construction of the local coordinate system.

[0019] 102, surface screening of the basic entity based on the local coordinate system to obtain an edge surface and a target surface, and identifying an edge internal line set based on the edge surface and the target surface; In this embodiment, the envelope of the base entity in the local coordinate system is calculated first, and the edge surface with a Z-axis height that meets the standard and a normal vector approximately opposite to the positive direction of the Z-axis is screened out in the local coordinate system. Then, the target surface with a normal not perpendicular to the Z-axis of the local coordinate system is selected from the adjacent surface of the edge surface. Next, the edges of the target surface are extracted, and the edge inside line with the largest two-dimensional distance from the trimming line is screened out. Finally, all curves tangent to the edge inside line are collected to form the edge inside line set.

[0020] 103. Constructing a closed boundary line of the bottom plate surface based on the edge inside line set; In this embodiment, the bottom surface of the trimming tool block is first screened out and the edges thereof are extracted as an initial boundary line set. The edges with a midpoint-to-trimming line distance equal to the tool retracting amount are removed to obtain a preliminary screening set. Then, the edge inside line set is projected onto the target surface to obtain a projection curve. The endpoint coordinates of the preliminary screening set are updated based on the projection curve, and the non-intersection endpoint height is unified. Finally, the closed boundary line of the bottom plate surface is formed.

[0021] 104. Generating an installation bottom plate surface auxiliary surface based on the closed boundary line; In this embodiment, the N-sided surface modeling method is adopted, and the closed boundary line of the bottom plate surface that has been constructed is taken as an input boundary to generate a closed and smooth surface. The surface is the installation bottom plate surface auxiliary surface.

[0022] 105. Creating a stretch body with the target surface as a reference, and then replacing the lower surface of the stretch body with the installation bottom plate surface auxiliary surface to obtain a bottom plate auxiliary entity; In this embodiment, the target surface is stretched in the negative direction of the Z-axis of the local coordinate system by a preset length to form a stretch body. Then, the temporary lower surface of the stretch body is replaced with the installation bottom plate surface auxiliary surface to ensure that the curved surface after replacement seamlessly connects with the side surface of the stretch body, thereby obtaining the bottom plate auxiliary entity.

[0023] 106. Performing entity merging on the bottom plate auxiliary entity and the base entity to obtain a complete trimming tool block entity with an installation bottom plate; In this embodiment, it is first detected whether there is spatial interference between the bottom plate auxiliary entity and the base entity. If there is no interference, the target surface of the base entity and the upper surface of the bottom plate auxiliary entity are taken as contact surfaces, and an entity merging operation is performed to finally obtain the trimming tool block installation bottom plate.

[0024] In the embodiment of the present application, the local coordinate system is first constructed by acquiring the basic entity, thereby providing a reference for subsequent design; then the cutting edge surface, target surface and internal line set of the cutting edge are screened and identified based on the local coordinate system, thereby realizing accurate extraction of key features; then the closed boundary line is constructed by the internal line of the cutting edge, and the installation bottom plate surface auxiliary surface is generated, thereby ensuring accurate matching of the bottom plate surface and the three-dimensional curved surface; then the stretching body is created based on the target surface as a reference, and the bottom plate auxiliary entity is obtained by replacing the lower surface, thereby ensuring the rationality and adaptability of the bottom plate structure; finally, the final product is obtained by merging the entities; the standardized design process including reference establishment, feature identification, boundary construction, surface generation, entity modeling and compliance merging is constructed, the forging trimming knife block with the installation bottom plate is generated, the problems of low design efficiency and poor quality stability caused by relying on manual experience in the prior art are solved, the standardization of the installation bottom plate design of the forging trimming knife block is realized, the design efficiency is greatly improved, and the design accuracy and quality stability are effectively ensured.

[0025] Please refer to Figure 2 In the two embodiments of the forging trimming knife block installation bottom plate design method in the embodiment of the present application, step 101 includes: 201, acquiring the forging trimming knife block cutting edge entity and the bottom plate shape entity, and merging the forging trimming knife block cutting edge entity and the bottom plate shape entity into a basic entity; In this embodiment, the pre-drawn forging trimming knife block cutting edge entity model and the bottom plate shape entity model are first imported through a three-dimensional modeling software (such as UG), wherein the forging trimming knife block cutting edge entity needs to include complete cutting edges, installation positioning surfaces and other core functional structures, and the bottom plate shape entity is a preliminary flat blank model, which only has a basic outline; then an entity merging operation is performed to fuse the two entities into one whole and record it as a basic entity, and it is necessary to ensure that there is no spatial interference between the two entities during the merging process, and the positioning reference of the trimming knife block cutting edge entity is aligned with the reference reserved area of the bottom plate shape entity; the advantage of this step is to integrate the dispersed parts into a unified design object, thereby providing a complete carrier for subsequent geometric analysis under the global coordinate system, and avoiding the coordinate deviation problem of multiple entity independent analysis.

[0026] 202, calculating the global envelope of the basic entity in the global coordinate system; In this embodiment, the boundary extreme values in each axial direction are extracted by traversing the coordinate values of all vertices of the entity, and the global envelope of the basic entity in the global coordinate system (X-Y-Z) is calculated, and the mathematical expression is: ; Among them, and are the minimum value and the maximum value of the basic entity in the X-axis direction of the global coordinate system; and respectively are minimum and maximum values of the base entity in the Y-axis direction of the global coordinate system; and respectively are minimum and maximum values of the base entity in the Z-axis direction of the global coordinate system; this step is mainly to determine the overall spatial range of the base entity, and to provide a quantitative geometric judgment basis for subsequent screening of the reference plane, avoiding subjective errors of manually selecting the reference plane.

[0027] 203, traverse all surfaces of the base entity, and screen based on the global envelope to obtain the reference plane; In this embodiment, first, all surfaces of the base entity are traversed, then, for each surface, if the surface (that is, the maximum value of the surface in the Z-axis direction is consistent with the maximum value of the global envelope of the base entity in the Z-axis direction), and the normal vector of the surface forms an acute angle with the Z-axis of the global coordinate system, then the surface is determined as the reference plane; the reason for this screening logic is that the maximum surface in the Z-axis direction is the top bearing surface of the entity, and the normal vector thereof forms an acute angle with the Z-axis, which can ensure that the surface is a flat positioning reference, which meets the installation and bearing requirements of the stamping die bottom plate, compared with manually selecting the reference plane, this method has a quantitative judgment standard, and can improve the consistency and accuracy of the selection of the reference plane.

[0028] 204, construct a local coordinate system of the trimming die block based on the reference plane; In this embodiment, on the screened reference plane, first, two mutually perpendicular vectors are selected, denoted as and , which are used as the X-axis and Y-axis directions of the local coordinate system, and then the normal vector of the reference plane is used as the Z-axis direction of the local coordinate system to form an orthogonal axis system; then, an arbitrary feature point (such as the geometric center point of the reference plane or the center point of the pre-set positioning hole) on the reference plane is selected as the origin of the local coordinate system, and finally the construction of the local coordinate system of the trimming die block is completed; this step is based on the geometric orthogonality of the reference plane to establish a local coordinate system, and the advantage is that it provides a precise local analysis reference for the subsequent screening of the blade edge surface and the target surface, which can eliminate the coordinate conversion error caused by the complex curved surface in the global coordinate system, and at the same time, the local coordinate system is aligned with the function structure of the trimming die block, which can improve the pertinence and accuracy of the subsequent feature recognition.

[0029] Please refer to Figure 3 , the three embodiments of the forging trimming die block mounting bottom plate design method in the embodiment of the application, step 102 includes: 301, calculate the local envelope of the base entity in the local coordinate system; 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.

[0030] 302. Traverse all surfaces of the base entity and filter based on the local envelope to obtain the cutting edge surface; 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: ; 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.

[0031] 303. Select the target face from all adjacent faces of the cutting edge face; 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.

[0032] 304. Filter out the internal lines of the cutting edge from all edges of the target surface; 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.

[0033] 305. Summarize all curves tangent to the internal lines of the cutting edge into a set of internal lines of the cutting edge; In this embodiment, the inside line of the cutting edge is actually a continuous contour composed of multiple tangent curves. Extracting a single edge cannot cover the complete boundary. In order to avoid missing the curves, the surface curvature analysis function is used to identify all curves (including continuous tangent edges on the target surface and extended tangent curves of adjacent surfaces) that have a tangent relationship with the inside line of the cutting edge. Then, the inside line of the cutting edge is topologically integrated with these tangent curves to form a complete set of inside lines of the cutting edge. The integrated curve set can ensure the integrity of the subsequent bottom plate closed boundary line and avoid gaps or redundancies in the bottom plate structure.

[0034] Referring to Figure 4 In the four embodiments of the design method of the forging trimming block mounting bottom plate in the embodiment of the present application, step 103 comprises: 401. Select the trimming block bottom surface from the base entity and extract all edges of the trimming block bottom surface as an initial boundary line set; In this embodiment, first, based on the local coordinate system constructed in step 204, all surfaces of the base entity are traversed, and the selection condition is set: if the normal vector of a surface is completely consistent with the positive direction of the Z-axis of the local coordinate system, it is determined that the surface is the trimming block bottom surface. The basis of this selection logic is that the trimming block bottom surface needs to be a horizontal bearing surface, and the normal vector consistent with the positive direction of the Z-axis can ensure the uniformity of the reference for subsequent boundary extraction. After the selection is completed, all contour edges of the trimming block bottom surface are extracted, and these edges are integrated into the initial boundary line set. In the extraction process, the topological connection relationship of each edge needs to be preserved to avoid isolated edges and provide a complete initial contour carrier for subsequent boundary selection and optimization.

[0035] 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 with a two-dimensional distance equal to the preset trimming block back retreat amount from the initial boundary line set to obtain a preliminary selection boundary line set; In this embodiment, first, the two-dimensional projection reference line of the trimming line in the XOY plane of the local coordinate system is called, and then each edge in the initial boundary line set is traversed to calculate the two-dimensional distance from the midpoint of each edge to the reference line. Subsequently, the trimming block back retreat amount (this parameter is determined by the mold assembly process) is set. If the two-dimensional distance from the midpoint of an edge to the reference line is equal to the trimming block back retreat amount, it is determined that the edge is a redundant boundary of the trimming 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 selection boundary line set. This step can effectively remove the boundaries unrelated to the trimming function, reduce the range of subsequent boundary optimization, and improve the design accuracy.

[0036] 403. Project all curves in the inside line set of the cutting edge onto the target surface to obtain projected curves; In this embodiment, based on the set of internal blade edge lines obtained in step 305 (containing multiple tangent curves), all curves in the set are vertically projected onto the target surface determined in step 303 along the Z-axis direction of the local coordinate system to form projection curves (the number of curves corresponds to the number of lines in the set of internal blade edge lines); the geometric continuity of the curves needs to be maintained during the projection process to ensure that the curvature and inflection points of the projected curves are consistent with those of the original internal blade edge lines; this operation converts the three-dimensional characteristic curve of the blade edge into a two-dimensional reference line on the target surface, providing a matching basis for subsequent intersection calibration of the boundary line.

[0037] 404、Based on the projection curve, update the end point coordinates of the preliminary screening boundary line set to obtain a closed boundary line of the bottom plate surface; In this embodiment, first, the space intersection of each edge in the preliminary screening boundary line set and the projection curve is traversed; if there is an intersection between the edge and the projection curve, the end point coordinates of the edge near the intersection are updated to the three-dimensional coordinates of the intersection; then, the Z-axis height values of all intersections in the local coordinate system are counted, and the maximum value is extracted; the Z-axis height of the non-connected end point of the edge in the boundary line set that does not intersect with the projection curve is uniformly adjusted to the maximum value to ensure that the end points of all boundary lines are on the same height plane; finally, the boundary line after coordinate updating is topologically closed to complete the missing connection segment and form a closed boundary line without gaps or overlaps; this step realizes intersection calibration and height unification, which not only ensures the precise adaptation of the bottom plate boundary to the internal blade edge line but also realizes the closure of the boundary, providing a complete and accurate contour reference for subsequent installation of the bottom plate surface modeling.

[0038] Please refer to Figure 5 In the five embodiments of the forging trimming block installation bottom plate design method in the embodiment of the application, step 104 includes: 501、Based on the preset N-edge surface modeling method, model the closed boundary line as the input boundary to obtain an installation bottom plate surface auxiliary surface; In this embodiment, first, the closed boundary line obtained in step 404 is confirmed, which is the contour reference of the installation bottom plate surface, and its geometric form directly determines the adaptability of the bottom plate surface; then, the preset N-edge surface modeling method (such as the N-edge surface modeling module of the three-dimensional modeling software UG) models the closed boundary line as the input boundary to obtain an installation bottom plate surface auxiliary surface; the core principle of N-edge surface modeling is to generate a continuous surface without seams through global fitting of the closed boundary line, and its advantage over the traditional multi-surface splicing method is that it can avoid the mold stress concentration problem caused by the splicing seam; the installation bottom plate surface auxiliary surface not only completely fits the closed contour of the closed boundary line but also has a three-dimensional curved surface form that is adapted to the trimming block and other components of the mold, providing a precise surface reference for the construction of the subsequent bottom plate auxiliary entity, and also solving the technical pain points of poor curve fitting and easy interference in traditional manual modeling.

[0039] Referring to Figure 6 In the six embodiments of the method for designing the installation bottom plate of the forging trimming block in the embodiments of the present application, step 105 comprises: 601, stretching the target face in the negative direction of the Z-axis of the local coordinate system by a preset length to form a stretched body; In this embodiment, first, the target face (as the stretching reference face) selected in step 303 and the local coordinate system of the trimming block constructed in step 204 are confirmed, and it is clear that the stretching direction is the negative direction of the Z-axis of the local coordinate system (opposite to the normal direction of the target face, to ensure that the stretched body extends to the installation side of the trimming block); then, according to the thickness process requirement of the bottom plate of the mold design, the preset length of the stretching is set (the length needs to be determined in combination with the overall assembly space of the mold); then, taking the target face as the sketch contour face, the stretching operation is performed in the negative direction of the Z-axis of the local coordinate system to generate the stretched body; the geometric shape of the target face needs to be kept unchanged during the stretching process, and the side surface of the stretched body is perpendicular to the boundary line of the target face.

[0040] 602, replacing the lower surface of the stretched body with the bottom plate surface auxiliary face to obtain a bottom plate auxiliary entity; In this embodiment, the installation bottom plate surface auxiliary face generated in step 501 is first called (with a complex three-dimensional curved surface shape suitable for adaptation with other components of the mold), and then the temporary lower surface of the stretched body (the flat bottom surface generated by stretching) is selected, and the temporary lower surface is replaced with the surface auxiliary face; during the replacement process, the surface continuity verification needs to be enabled to ensure that the surface auxiliary face is tangent to the side surface of the stretched body (without obvious corners to avoid stress concentration during mold assembly), and at the same time, the geometric center of the surface auxiliary face after replacement is aligned with the reference center of the stretched body; after the replacement is completed, the integrated bottom plate auxiliary entity is obtained, the top of which is the coincident face coinciding with the target face, and the bottom of which is the surface auxiliary face; this step realizes the accurate molding of the outer surface of the bottom plate through surface replacement, which greatly improves the molding efficiency and accuracy of the curved surface of the bottom plate compared with the traditional multi-step trimming and Boolean operation, and at the same time, avoids the curve interference problem that easily occurs in manual modeling.

[0041] Referring to Figure 7 In the seven embodiments of the method for designing the installation bottom plate of the forging trimming block in the embodiments of the present application, step 106 comprises: 701, judging whether there is interference between the bottom plate auxiliary entity and the base entity; In this embodiment, firstly, the base entity obtained in step 201 and the bottom plate auxiliary entity generated in step 602 are subjected to entity interference detection, a spatial topology intersection algorithm is adopted, all three-dimensional grid cells of the two entities are traversed, and it is detected whether there is an area with overlapping spatial coordinates; during the detection process, an interference judgment threshold needs to be set, if an interference area is detected, the coordinates and geometric shape of the interference part are located, and an interference report is output, prompting that the length of the stretched body needs to be adjusted in step 601 or the curved surface shape of the surface auxiliary surface needs to be optimized in step 602 until the interference is eliminated; if no interference area is detected, it is determined that there is no conflict in the spatial positions of the two, and the subsequent merging process can be entered; through quantitative spatial topology analysis, manual experience judgment is replaced, and structural conflicts in the merged entity are avoided, thereby guaranteeing the feasibility of subsequent mold assembly.

[0042] 702、If there is no interference, the target surface of the base entity and the upper surface of the bottom plate auxiliary entity are taken as contact surfaces, the bottom plate auxiliary entity is merged with the base entity to obtain a complete forging trimming knife block entity with a mounting bottom plate; In this embodiment, firstly, the target surface obtained by screening in step 303 on the base entity and the upper surface of the bottom plate auxiliary entity are confirmed; subsequently, the target surface and the upper surface of the bottom plate auxiliary entity are taken as fusion reference, and the two entities are integrated into an integrated structure, the curved surface continuity of the contact surface needs to be maintained during the merging process to avoid the appearance of splicing edges; after the merging is completed, the geometric integrity of the overall entity also needs to be checked to confirm that there is no missing surface, no overhanging edge, and no redundant structure, and finally a trimming knife block mounting bottom plate with stable structure and strong adaptability is obtained; through accurate contact surface positioning and merging, the connection strength of the knife block and the bottom plate is guaranteed, and the functional shape of the outer surface S0 of the bottom plate is also reserved, thereby solving the problems of fitting misplacement and weak structure that are prone to occur in traditional manual merging.

[0043] The design method of the forging trimming knife block mounting bottom plate in the embodiment of the application is described above, and the design device of the forging trimming knife block mounting bottom plate in the embodiment of the application is described below, please refer to Figure 8 The design device of the forging trimming knife block mounting bottom plate in the embodiment of the application includes one embodiment: A coordinate construction module 801 is configured to acquire a trimming knife block edge entity and a bottom plate shape entity to construct a base entity, and construct a trimming knife block local coordinate system based on the base entity; An edge recognition module 802 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 recognize an edge internal line set based on the edge face and the target face; A boundary construction module 803 is configured to construct a closed boundary line of a bottom plate surface based on the edge internal line set; A surface generation module 804 is configured to generate an installation bottom plate surface auxiliary surface based on the closed boundary line; The entity generation module 805 creates a stretch entity based on the target face, and then replaces the lower surface of the stretch entity with the installation base plate surface auxiliary face to obtain a base plate auxiliary entity; The entity merging module 806 performs entity merging on the base plate auxiliary entity and the base entity to obtain a complete forging trimming knife block entity with an installation base plate. In this embodiment, the coordinate construction module 801 is used to obtain the base entity and construct a local coordinate system, providing a reference for subsequent design; then the edge recognition module 802 is used to screen the edge face, the target face and recognize the edge internal line set based on the local coordinate system, realizing accurate extraction of key features; the boundary construction module 803 is used to construct a closed boundary line through the edge internal line, and the surface generation module 804 is used to generate an installation base plate surface auxiliary face based on the closed boundary line, ensuring accurate matching of the base plate surface and the three-dimensional curved surface; then the entity generation module 805 is used to create a stretch entity based on the target face and replace the lower surface to obtain a base plate auxiliary entity, ensuring the rationality and adaptability of the base plate structure; finally, the entity merging module 806 is used to perform entity merging to obtain the final product; the present application constructs a standardized design process including reference establishment, feature recognition, boundary construction, surface generation, entity modeling and compliance merging, generates a forging trimming knife block with an installation base plate, solves the problems of low design efficiency and poor quality stability caused by relying on manual experience in the prior art, realizes the standardization of trimming knife block installation base plate design, greatly improves the design efficiency, and effectively guarantees the design precision and quality stability.

[0044] Figure 9 is a structure schematic diagram of a forging trimming knife block installation base plate design device provided by an embodiment of the present application. The forging trimming knife block installation base plate design device 900 can have relatively large differences due to different configurations or performances, and can include one or more processors (central processing units, CPUs) 910 (for example, one or more processors) and a memory 920, and one or more storage media 930 (for example, one or more mass storage devices) storing application programs 933 or data 932. The memory 920 and the storage media 930 can be temporary storage or persistent storage. The programs stored in the storage media 930 can include one or more modules (not shown in the figure), and each module can include a series of instruction operations in the forging trimming knife block installation base plate design device 900. Further, the processor 910 can be configured to communicate with the storage media 930 and execute a series of instruction operations in the storage media 930 on the forging trimming knife block installation base plate design device 900 to realize the steps of the trimming knife block installation base plate design method provided by the above-mentioned method embodiments.

[0045] The forging trimmer block mounting base design apparatus 900 can 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, and the like. Those skilled in the art will appreciate that Figure 9 The illustrated forging trimmer block mounting base design apparatus structure is not meant to limit the forging trimmer block mounting base design apparatus, which can include more or fewer components than shown, or combine some components, or have a different arrangement of components.

[0046] The present application also provides a computer readable storage medium, which can be a non-volatile computer readable storage medium, or a volatile computer readable storage medium. The computer readable storage medium stores instructions, which, when executed on a computer, cause the computer to perform the steps of the forging trimmer block mounting base design method.

[0047] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system or device, unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0048] The integrated unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0049] Finally, it should be noted that the above only describes the preferred examples of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications can be made to the technical solutions described in the foregoing embodiments, or some of the technical features thereof can be replaced equivalently, without departing from the spirit and principle of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of designing a trim tool block mounting plate for a forging, characterized by, The design method of the forging trimming tool block mounting bottom plate 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 of the edge based on the edge face and the target face; constructing a closed boundary line of a bottom plate surface based on the internal edge line set; generating a mounting 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 mounting 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 comprises: 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 body of the basic entity in a global coordinate system; traversing all surfaces of the basic entity, and performing screening based on the global envelope body 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 forging, according to claim 1, wherein, 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 of the edge based on the edge face and the target face comprises: calculating a local envelope body of the basic entity in the local coordinate system; traversing all surfaces of the basic entity, and performing screening based on the local envelope body to obtain the edge face; screening a target face from all adjacent faces of the edge face; screening internal edge lines from all edges of the target face; collecting all curves tangent to the internal edge lines into the internal edge line set.

4. The method of claim 1, wherein: 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 a 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; 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.

5. The method of claim 1, wherein, The generation of the mounting bottom plate surface auxiliary face based on the closed boundary line comprises: modeling the mounting bottom plate surface auxiliary face based on a preset N-edge surface modeling method with the closed boundary line as an input boundary.

6. 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 mounting 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 a lower surface of the stretch body with the bottom plate surface auxiliary face to obtain the bottom plate auxiliary entity.

7. The design method of a trim tool block mounting plate for a swage, according to 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 bottom plate auxiliary entity interferes with the base entity; if there is no interference, 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 bottom plate auxiliary entity and the base entity to obtain a complete trimming blade block entity with a mounting bottom plate.

8. A swage trimmer block mounting bed design apparatus, characterized by, The method comprises the following steps: a coordinate construction module is configured to acquire 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; a boundary construction module is configured to construct a closed boundary line of a bottom plate surface based on the edge internal line set; 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 bottom plate auxiliary entity and the base entity to obtain a complete trimming blade block entity with a mounting bottom plate.

9. 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 1-7.

10. 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 1-7.

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