A method and system for generating a drawing die for automobile panel

Abstract

The present invention proposes a method for generating a drawing die for an automobile panel, comprising the following steps: inputting a process digital model; constructing a planning form, wherein the information and constraint conditions of each component of the drawing die to be generated are provided in the planning form; preprocessing the process digital model according to the planning form, and generating a three-dimensional structural model of the drawing die for an automobile panel. By constructing a planning form, the model parameters of the drawing die are written into the form, and the general model generates the model of the drawing die according to the written form parameters, thereby being able to automatically design the drawing die in a more systematic and standardized manner, thereby effectively improving the quality and efficiency of the die.

Description

Technical Field

[0001] The invention relates to the technical field of automobile mold design, and in particular to a method and system for generating a drawing die for an automobile cover. Background Art

[0002] As competition in the automotive market intensifies, market competition among mold companies becomes more severe, and the "short cycle, high quality" mold development method is becoming more and more common. Some mold manufacturing companies are undergoing important changes: for example, molds are changing from batch production to parallel development and manufacturing according to market or customer requirements; from independent development of product design, process design, mold design and mold manufacturing to system integrated manufacturing development; the mold development process has continuously improved the requirements for quality, cost, efficiency and safety.

[0003] An intelligent design method for automobile molds with publication number CN113408053A includes: inputting a DL process plan diagram, defining the mold work content involved in each process according to the input DL process plan diagram, defining each process content in the DL process plan diagram into a corresponding tool body, calling a corresponding function package according to the selected process tool to generate corresponding working parts, connecting the generated working parts to form a mold structure, and optimizing the generated mold structure by manual inspection. The manual inspection includes detecting whether a functional module is missing, whether a parametric assembly of associated parts is established, whether the selection of standard parts meets the working requirements, whether the stroke relationship is reasonable, and whether the movement of parts interferes.

[0004] At present, the various process contents in the input DL process plan are integrated into the corresponding toolkit, and the corresponding working parts are generated by calling the toolkit, and then the generated working parts are connected. In this process, there will be large interference problems between the working parts generated. A lot of work is needed to check and correct the interference later. The method is cumbersome, wastes a lot of time, and reduces the quality and efficiency of mold design. Summary of the invention

[0005] In view of this, the present invention proposes a method and system for generating a drawing die for an automobile cover. Through parametric modeling and rule-based rapid design of the die structure, the design time is greatly shortened and design anomalies are reduced. The design process is simple, which can save a lot of design work time and improve the quality and efficiency of die design.

[0006] The technical solution of the present invention is implemented as follows: In a first aspect, the present invention provides a method for generating a drawing die for an automobile cover, comprising the following steps:

[0007] S1, import process digital model;

[0008] S2, constructing a planning form, wherein the planning form contains information and constraints of various components of the drawing die to be generated;

[0009] S3, pre-process the process digital model according to the planning form to generate a three-dimensional structural model of the automobile cover drawing die.

[0010] On the basis of the above technical solution, preferably, the input process digital model in step S1, wherein the process digital model includes defining process surfaces, parting lines, bevel lines, gravity lines, machine tool push rods, blank lines, concave mold surfaces, convex mold surfaces and pressure ring surfaces.

[0011] On the basis of the above technical scheme, preferably, the construction planning form in step S2 is provided with information and constraints of each component of the drawing die to be generated, wherein the drawing die includes a punch, a die and a pressure ring component, and the planning form includes a system planning table and a layout planning table, the system planning table includes the structural form, main structure information, installation component information, guide plate component information, positioning component information and lifting component information of each component of the mold to be generated; the layout planning table includes the layout constraints of each component of the mold to be generated.

[0012] On the basis of the above technical solution, preferably, the system planning table in step S2 includes the structural form of the punch to be generated, the main structure information, the installation component information, the guide plate component information, the positioning component information and the lifting component information, wherein,

[0013] The main structure information includes the wall thickness, characteristic rib thickness, free rib thickness and auxiliary rib thickness;

[0014] The installation component information includes the main installation form, installation manufacturer, whether the parting line is arranged, installation information, installation screw specifications, pin installation manufacturer, quantity and specifications;

[0015] The guide plate assembly information includes the guide plate assembly form, whether a double-layer guide plate is arranged, and the guide plate manufacturer information;

[0016] The positioning component information includes the type of the positioning component, the manufacturer of the positioning component, the quantity and specifications, and the types of the positioning component include an inner key, an outer key and a mushroom pin;

[0017] The lifting component information includes the lifting structure information, lifting cast-in bolt component manufacturers, lifting threaded hole component manufacturers, CH standard parts manufacturers and specifications, and half-moon positioning standard parts manufacturers and specifications.

[0018] On the basis of the above technical solution, preferably, the step S3 generates the parameterized three-dimensional structure model of the general drawing die according to the planning form to construct the three-dimensional structure model of each current component, which includes the following sub-steps:

[0019] S31, for the main body design of the punch, according to the main structure information in the planning form and the corresponding constraints, the mold surface wall, the follow-up ribs, the auxiliary ribs and the characteristic ribs of the punch are constructed;

[0020] S32, designing the profile standard parts of the punch, obtaining the positioning component information and the corresponding constraint conditions in the planning form, and positioning and arranging the positions of the inner key, the outer key and the mushroom pin, wherein the constraints for the positioning and arranging of the positions of the inner key, the outer key and the mushroom pin are the same;

[0021] S33, obtaining the guide plate component information and corresponding constraint conditions in the planning form, and positioning and arranging the guide plate of the punch;

[0022] S34, obtain the punch structure form, the punch structure form includes an integral design and a split design. If it is judged to be an integral design, the three-dimensional model structure of the punch is output. If it is a split design, the information of the punch installation component, lifting component and positioning component in the planning form and the corresponding constraints are obtained, the installation component, lifting component and positioning component of the punch are positioned and laid out, and the three-dimensional model structure of the punch is output.

[0023] On the basis of the above technical solution, preferably, the main body design of the punch in step S31 constructs the punch mold wall, free ribs, auxiliary ribs and characteristic ribs according to the main structure information and corresponding constraints in the planning form, which includes the following sub-steps:

[0024] S311, obtaining the profile wall thickness information and corresponding constraint conditions in the planning form, constructing the profile wall of the punch, calculating the minimum height of each component, and selecting a die structure that can match the punch according to the minimum height of the punch;

[0025] S312, determining the features of the punch's conformal rib and cutting edge according to the parting line, obtaining conformal rib thickness information and corresponding constraint conditions in the planning form, and constructing the conformal rib of the punch;

[0026] S313, obtaining characteristic rib information in the planning form, determining whether characteristic rib thickness information is selected or input, if yes, obtaining characteristic rib thickness information and corresponding constraint conditions, constructing characteristic ribs of the punch, reinforcing the conforming ribs and characteristic ribs, and avoiding the auxiliary ribs, if no, proceeding to step S314;

[0027] S314, obtaining the auxiliary reinforcement thickness information and corresponding constraint conditions in the planning form, and constructing the auxiliary reinforcement of the punch.

[0028] On the basis of the above technical solution, preferably, the standard parts of the profile of the punch are designed in step S32, the positioning component information and the corresponding constraints in the planning form are obtained, and the positions of the inner key, the outer key and the mushroom pin are positioned and laid out, and the constraints of the positioning and layout of the positions of the inner key, the outer key and the mushroom pin are the same, wherein the following sub-steps are included:

[0029] S321, obtaining the number of internal keys in the planning form, if the number of internal keys is 0, then directly end and execute step S33; if the number of internal keys is 3, then execute step S322; if the number of internal keys is 4, then directly execute step S323;

[0030] S322, according to the parting line of the punch, obtain the punch parting line containing box, and obtain the transverse length L X and the longitudinal length L Y ; If L X ≥L Y , two inner keys are arranged in the transverse direction and one inner key is arranged in the longitudinal direction, wherein the inner key in the longitudinal direction is arranged on the side far from the center position of the punch housing box, and step S324 is executed; otherwise, one inner key is arranged in the transverse direction and two inner keys are arranged in the longitudinal direction, wherein the inner key in the transverse direction is arranged on the side far from the center position of the punch housing box, and step S324 is executed;

[0031] S323, arrange two inner keys in both the horizontal direction and the vertical direction, and execute step S324;

[0032] S324, determine the vertical position of the inner key, arrange the inner key at the center line of the punch, the intersection of the center line of the inner key and the parting line of the component is the starting position of the inner key, the other end faces the origin of the coordinate system, and the inner key is always parallel to the coordinate axis, the inner keys on both sides of the same orientation are on the same straight line, and the vertical direction of the inner key is on both sides of the punch installation surface;

[0033] S325, determining the plane position of the positioning inner key, wherein it is determined whether the push rod is on the coordinate axis. If so, the inner key is placed at a position 75 mm away from the coordinate axis. If not, the center line of the inner key is placed on the coordinate axis and avoids the position of the mounting assembly. The standard part on the mounting assembly cannot exist in the same axial direction as the inner key. If so, the inner key is placed at a position 75 mm away from the coordinate axis.

[0034] S326, output the internal key position positioning coordinates.

[0035] On the basis of the above technical solution, preferably, the step S3 further includes generating the structure of the blank holder, which includes the following sub-steps:

[0036] S35, the planning form also includes the push rod leg assembly information, balance block assembly information, positioning plate assembly information, anti-side assembly information, fender follow-up information, lifting lug information, push rod guide assembly information, travel limit assembly information, lifting and flipping assembly information, pier dead block assembly information and rib plate information of the blank holder ring, and the outer contour line of the blank holder ring is jointly constrained according to the push rod leg assembly information, balance block assembly information, positioning plate assembly information, anti-side assembly information, fender follow-up information and lifting lug information in the planning form;

[0037] S36, generating a blank holder body according to the outer contour of the blank holder;

[0038] S37, respectively obtain the guide component information, travel limit component information, lifting and flipping component information, pier dead block component information and rib plate information of the blank holder in the planning form and the corresponding constraints, generate the guide component, travel limit component, lifting and flipping component and pier dead block component on the blank holder body in turn, and arrange the rib plate; complete the blank holder generation.

[0039] In a second aspect, the present invention further provides a system for generating a drawing die for an automobile panel, including the method for generating a drawing die for an automobile panel as described above, wherein the system comprises:

[0040] Import module, used to input process digital model;

[0041] A planning module, used for constructing a planning form, wherein the planning form contains information and constraints of various components of the drawing die to be generated;

[0042] The construction module is used to pre-process the process digital model according to the planning form and generate a three-dimensional structural model of the automobile cover drawing die.

[0043] In a third aspect, the present invention further provides an electronic device, comprising: a memory, a processor, and a method program for generating a drawing die for an automobile cover part stored in the memory and executable on the processor, wherein the method program for generating a drawing die for an automobile cover part is configured to implement the steps of the method for generating a drawing die for an automobile cover part as described above.

[0044] The method and system for generating a drawing die for an automobile panel of the present invention have the following beneficial effects compared with the prior art:

[0045] (1) By constructing a planning form, the model parameters of the drawing die are written into the form. The general model generates the model of the drawing die according to the written form parameters. This part can be more systematic and standardized in parameterized design and manufacturing of the drawing die, which is convenient for adjusting the corresponding structural parameters from the planning form later, thereby effectively improving the quality and efficiency of the mold;

[0046] (2) The push rod legs, balance blocks, positioning plates, side-protection components and / or lifting ears that affect the position of the blank holder contour are set to jointly constrain the maximum contour of the blank holder body; then the blank holder body is generated according to the maximum contour of the blank holder body, which helps to ensure the accuracy of the blank holder during the manufacturing process. The synergy of each component can reduce manufacturing errors and improve the accuracy of the mold, thereby ensuring the accuracy and quality of the final product. In addition, the blank holder is planned and constructed based on the punch, and the corresponding size can be accurately determined, reducing the mold manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 A schematic diagram of the structure of a device in a hardware operating environment involved in an embodiment of the present invention;

[0049] Figure 2 A schematic diagram of a process for generating a drawing die for an automobile panel according to the present invention;

[0050] Figure 3 A flow chart of the design of a punch of a method for generating a drawing die for an automobile panel according to the present invention;

[0051] Figure 4 A flow chart of the design of a punch positioning component of a method for generating a drawing die for an automobile panel according to the present invention;

[0052] Figure 5 A design flow chart of a blank holder side protection component of a method for generating a drawing die for an automobile panel according to the present invention;

[0053] Figure 6 A design flow chart for determining the number of side-protection components of a method for generating a drawing die for an automobile panel according to the present invention;

[0054] Figure 7 A design flow chart of a blank holder guide assembly of a method for generating a drawing die for an automobile panel according to the present invention;

[0055] Figure 8 A schematic diagram of the system planning of a method for generating a drawing die for an automobile panel according to the present invention;

[0056] Fig. 9The present invention is a schematic diagram of the layout planning of a method for generating a drawing die for an automobile panel. DETAILED DESCRIPTION

[0057] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] like Figure 1 As shown, the device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0059] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation of the device. In actual applications, the device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0060] like Figure 1 As shown, the memory 1005 as a medium may include an operating system, a network communication module, a user interface module, and a method program for generating a drawing die for an automobile panel.

[0061] exist Figure 1In the device shown, the network interface 1004 is mainly used to establish a communication connection between the device and a server storing all data required in the automobile cover drawing die mold generation method system; the user interface 1003 is mainly used to interact with the user for data; the processor 1001 and the memory 1005 in the automobile cover drawing die mold generation method device of the present invention can be set in the automobile cover drawing die mold generation method device, and the automobile cover drawing die mold generation method device calls the automobile cover drawing die mold generation method program stored in the memory 1005 through the processor 1001, and executes the automobile cover drawing die mold generation method provided by the implementation of the present invention.

[0062] like Figure 2 As shown, a method for generating a drawing die for an automobile cover of the present invention comprises the following steps:

[0063] S1, input process digital model;

[0064] The input process digital model in step S1, wherein the process digital model includes defining process profile, parting line, bevel line, gravity line, machine tool ejector, blank line, concave mold profile, convex mold surface and blank holder profile.

[0065] It should be noted that the process digital model contains a large amount of model parameter information, which is used to define and describe each link in the manufacturing process, including process surfaces, parting lines, bevel lines, gravity lines, machine tool ejectors, blank lines, concave mold surfaces, convex model surfaces and blank holder surfaces, etc., which together constitute the basis of mold design and manufacturing.

[0066] Among them, the process profile refers to the specific shape or structure required in the product manufacturing process, which determines the appearance and function of the product; the parting line is the boundary where the mold is separated during the manufacturing process, which is crucial to the smooth demoulding of the product and the maintenance of the mold; the bevel line mainly appears in certain parts of the mold to meet specific process or production requirements; the gravity line is used to describe the direction in which the product or mold is acted upon by gravity during the manufacturing process, which is conducive to predicting and solving possible deformations or defects; the machine tool ejector is used to eject the product when the mold is opened to ensure that the product can be smoothly removed from the mold; the blank line describes the shape and size of the original material before it is processed into a product, providing a basis for subsequent processing steps; the concave mold surface, convex mold surface and pressure ring surface are important components of the mold, which together determine the final shape and quality of the product; when importing the process digital model, the accuracy and completeness of this information must be ensured to ensure the smooth progress of the entire manufacturing process.

[0067] In this embodiment, the overall framework of the automobile cover drawing die generation design is constructed based on the UX11 three-dimensional software development software platform. It can be understood that it is not limited to the UX11 three-dimensional software, and SolidWorks three-dimensional drawing software or AutoCAD three-dimensional drawing software can also be used.

[0068] S2, constructing a planning form, in which the information and constraints of each component of the drawing die to be generated are set;

[0069] Among them, the drawing die includes a punch, a die and a pressure ring component; the planning form includes a system planning table and a layout planning table, the system planning table includes the structural form of the punch to be generated, the main structure information, the installation component information, the guide plate component information, the positioning component information and the lifting component information; the layout planning table includes the layout constraints of each component of the mold to be generated.

[0070] Among them, the main structure information includes the wall thickness, characteristic rib thickness, free rib thickness and auxiliary rib thickness information;

[0071] The installation component information includes the main installation form, installation manufacturer, whether the parting line is arranged, installation information, installation screw specifications, pin installation manufacturer, quantity and specifications;

[0072] The guide plate assembly information includes the guide plate assembly form, whether a double-layer guide plate is arranged, and the guide plate manufacturer information;

[0073] The positioning component information includes the type of positioning component, the manufacturer of the positioning component, the quantity and specifications. The types of positioning components include inner keys, outer keys and mushroom pins.

[0074] The lifting component information includes the lifting structure information, lifting cast-in bolt component manufacturers, lifting threaded hole component manufacturers, CH standard parts manufacturers and specifications, and half-moon positioning standard parts manufacturers and specifications.

[0075] It should be noted that by constructing a planning form, the model parameters of the drawing die are written into the form, and the general model generates the model of the drawing die according to the written form parameters. This part can design and manufacture the drawing die in a more systematic and standardized parameterized manner, which is convenient for adjusting the corresponding structural parameters from the planning form in the later stage, thereby effectively improving the quality and efficiency of the mold.

[0076] S3, pre-processing the process digital model according to the planning form to generate a three-dimensional structural model of the automobile panel drawing die;

[0077] Wherein, step S3 includes the following sub-steps:

[0078] S31, for the main body design of the punch, according to the main structure information in the planning form and the corresponding constraints, the mold surface wall, the follow-up ribs, the auxiliary ribs and the characteristic ribs of the punch are constructed;

[0079] Step S31 includes the following sub-steps:

[0080] S311, obtaining the profile wall thickness information and corresponding constraint conditions in the planning form, constructing the profile wall of the punch, calculating the minimum height of each component, and selecting a die structure that can match the punch according to the minimum height of the punch;

[0081] S312, determining the features of the punch's conformal rib and cutting edge according to the parting line, obtaining conformal rib thickness information and corresponding constraint conditions in the planning form, and constructing the conformal rib of the punch;

[0082] S313, obtaining characteristic rib information in the planning form, determining whether characteristic rib thickness information is selected or input, if yes, obtaining characteristic rib thickness information and corresponding constraint conditions, constructing characteristic ribs of the punch, reinforcing the free ribs and characteristic ribs, and avoiding the auxiliary ribs, if no, proceeding to step S314;

[0083] S314, obtaining the auxiliary reinforcement thickness information and corresponding constraint conditions in the planning form, and constructing the auxiliary reinforcement of the punch.

[0084] It should be noted that key information such as the wall thickness, follow-type rib thickness, characteristic rib thickness, and auxiliary rib thickness in the planning form is obtained, and each part of the punch is constructed based on this information. At the same time, in the process of constructing the punch, the follow-type rib, characteristic rib, and auxiliary rib need to be reinforced and avoided to ensure the overall strength and stability of the mold;

[0085] S32, designing the profile standard parts of the punch, obtaining the positioning component information and the corresponding constraint conditions in the planning form, and positioning and arranging the positions of the inner key, the outer key and the mushroom pin, wherein the constraints for the positioning and arranging of the positions of the inner key, the outer key and the mushroom pin are the same;

[0086] Wherein, step S32 includes the following sub-steps:

[0087] S321, obtaining the number of internal keys in the planning form, if the number of internal keys is 0, then directly end and execute step S33; if the number of internal keys is 3, then execute step S322; if the number of internal keys is 4, then directly execute step S323;

[0088] S322, according to the parting line of the punch, obtain the punch parting line containing box, and obtain the transverse length L X and the longitudinal length L Y ; If L X ≥L Y, two inner keys are arranged in the transverse direction and one inner key is arranged in the longitudinal direction, wherein the inner key in the longitudinal direction is arranged on the side far from the center position of the punch housing box, and step S324 is executed; otherwise, one inner key is arranged in the transverse direction and two inner keys are arranged in the longitudinal direction, wherein the inner key in the transverse direction is arranged on the side far from the center position of the punch housing box, and step S324 is executed;

[0089] The punch parting line containment box is a rectangle formed by the four vertices of the punch parting line, and the length of the rectangle is L. X , the width of the rectangle is L Y ;

[0090] It should be noted that when the number of internal keys is 3, compare the transverse length and longitudinal length of the punch parting line containing box. When the transverse length of the punch parting line containing box is greater than the longitudinal length of the punch parting line containing box, two internal keys are arranged in the transverse direction and one internal key is arranged in the longitudinal direction, wherein the one internal key arranged in the longitudinal direction is preferentially placed on the side far from the center position of the punch parting line containing box. On the contrary, when the transverse length of the punch parting line containing box is less than the longitudinal length of the punch parting line containing box, one internal key is arranged in the transverse direction and two internal keys are arranged in the longitudinal direction, wherein the transverse direction is preferentially placed on the side far from the center position of the punch parting line containing box.

[0091] S323, arrange two inner keys in both the horizontal direction and the vertical direction, and execute step S324;

[0092] S324, determine the vertical position of the inner key, arrange the inner key at the center line of the punch, the intersection of the center line of the inner key and the parting line of the component is the starting position of the inner key, the other end faces the origin of the coordinate system, and the inner key is always parallel to the coordinate axis, the inner keys on both sides of the same orientation are on the same straight line, and the vertical direction of the inner key is on both sides of the punch installation surface;

[0093] It should be noted that the inner key is on both sides of the punch mounting surface in the vertical direction, that is, the punch mounting surface divides the inner key into equal parts up and down. It can be understood that, assuming the height of the inner key is H, when the inner key is installed into the punch in the vertical direction, the extended length is the same as the length reserved on the outside, which is 1 / 2H, ensuring the balanced installation of the inner key in the punch, making the lengths on both sides equal, which helps to maintain the stability and symmetry of the structure.

[0094] S325, determining the plane position of the positioning inner key, wherein it is determined whether the push rod is on the coordinate axis. If so, the inner key is placed at a position 75 mm away from the coordinate axis. If not, the center line of the inner key is placed on the coordinate axis and avoids the position of the mounting assembly. The standard part on the mounting assembly cannot exist in the same axial direction as the inner key. If so, the inner key is placed at a position 75 mm away from the coordinate axis.

[0095] It should be noted that the position of the push rod should be checked first. If the push rod is on the coordinate axis, in order to avoid interference, the inner key should be placed 75 mm away from the coordinate axis. If the push rod is not on the coordinate axis, the center line of the inner key is on the coordinate axis. No matter how the push rod is arranged, the installation of the inner key should avoid the position of other mounting components to ensure that the installation of the inner key will not conflict with other standard parts on the mounting component. If the inner key conflicts with standard parts on the mounting component, the inner key should be placed 75 mm away from the coordinate axis.

[0096] S326, output the internal key position positioning coordinates.

[0097] It should be noted that after the vertical and planar positions of the inner key are determined, the specific position coordinates of the inner key can be output to guide the installation and positioning of the inner key.

[0098] S33, obtaining the guide plate component information and corresponding constraint conditions in the planning form, and positioning and arranging the guide plate of the punch;

[0099] S34, obtain the punch structure form, the punch structure form includes integral design and split design. If it is judged to be an integral design, the three-dimensional model structure of the punch is output. If it is a split design, the information of the punch installation component, lifting component and positioning component in the planning form and the corresponding constraints are obtained, the installation component, lifting component and positioning component of the punch are positioned and laid out, and the three-dimensional model structure of the punch is output.

[0100] In this embodiment, the positioning layout method of the guide plate assembly, the mounting assembly and the lifting assembly of the punch is the same as that of the positioning assembly, and will not be elaborated on here.

[0101] Step S3 also includes generating the structure of the blank holder, which includes the following sub-steps:

[0102] S35, the planning form also includes the push rod leg assembly information of the blank holder, the balance block assembly information, the positioning plate assembly information, the anti-side assembly information, the fender profile information, the lifting lug information, the blank holder guide assembly information, the travel limit assembly information, the lifting and flipping assembly information, the pier dead block assembly information and the rib plate information;

[0103] Constrain the outer contour line of the blank holder ring according to the information of the push rod leg assembly, the balance block assembly, the positioning plate assembly, the side protection assembly, the fender profile information, and the lifting lug information in the planning form;

[0104] Specifically, according to the information of the mandrel leg assembly and the balancing weight assembly in the planning form and the corresponding constraints, the mandrel leg assembly and the balancing weight assembly are constructed and positioned and laid out;

[0105] Judge whether the die structure form in the planning form is box type and the foundry lug information. If the planning form contains this parameter information, construct and position the lug components of the binder according to the lug information and corresponding constraint conditions in the planning form. Otherwise, construct and position the locating plate components and anti-side components of the binder according to the locating plate component information and anti-side component information in the planning form and the corresponding constraint conditions;

[0106] Among them, in the construction of the anti-side components, first determine the number of anti-sides according to the planning form, then determine the position of each anti-side, and finally generate the anti-side components;

[0107] Among them, determine the number of anti-sides according to the planning form. Judge whether there is an anti-side design in the planning form. If there is no anti-side design, the process ends and the wing panel follow-up judgment is executed. If there is an anti-side design, the side where it is located is given in the anti-side design planning form, including the front and back sides of the feeding, the left and right sides, and the front, back, left and right side designs. Then further judge whether the quantity is not specified in the planning form. If the quantity is specified, the process ends and the wing panel follow-up judgment is executed. If the quantity is not specified, determine the anti-side type and judge whether the anti-side type is an anti-side part, a conical balance block or an anti-side guide plate;

[0108] If it is an anti-side part, determine the quantity according to the length L1 of the side panel blanking line. Among them, when 0 < L1 ≤ 2700, determine the number of anti-side parts to be 2; when L1 > 2700, determine the number of anti-side parts to be 3. The process ends and the wing panel follow-up judgment is executed;

[0109] If it is a conical balance block, fix and arrange 4, and the process ends and the wing panel follow-up judgment is executed;

[0110] If it is an anti-side guide plate, determine the quantity according to the length L2 of the side panel blanking line. When 0 < L2 ≤ 500, determine the number of anti-side guide plates to be 1; when 500 < L2 ≤ 2000, determine the number of anti-side guide plates to be 2; when 2000 < L2 ≤ 2700, determine the number of anti-side guide plates to be 3; when L2 > 2700, determine the number of anti-side parts to be 4.

[0111] Among them, determine the position of each anti-side:

[0112] If it is an anti-side key: Determine the positions of the X-axis in the horizontal direction and the Y-axis in the vertical direction, and the following constraints need to be satisfied:

[0113] The anti-side keys at both ends are arranged on the inner side of the first balancing block on that side. When the total number of balancing blocks on that side is ≤2, they are arranged on the outer side of the balancing block; avoid the positioning plate, the projected safe distance between the anti-side key and the boundary of the pressing surface is greater than 25mm, move along the corresponding coordinate axis of the side to avoid other components, and keep the distance between the anti-side component and the balancing block and positioning plate component greater than 10mm; if the number of anti-side keys is 3, the middle anti-side keys are evenly distributed to avoid the balancing block and the positioning plate; the coordinates are multiples of 5 and still meet the above conditions; when the anti-side keys are arranged on the outside, the parting lines are offset by a preset length to obtain an inclusive box. When arranged in the transverse direction X, the difference body is limited to the inner side of the longitudinal direction Y of the inclusive box; when arranged in the longitudinal direction Y, the difference body is limited to the inner side of the transverse direction X of the inclusive box. If there is no position for arrangement, it is placed behind the first balancing block. If the program prompts that it cannot be arranged, please handle it manually;

[0114] The following constraints must be met to determine the vertical Z-axis position: take the height distance coordinate of the point on the boundary of the pressing surface that is closest to the side guard; and take a multiple of 5.

[0115] Placement angle: parallel to the side.

[0116] If it is a conical balancing weight, the conical balancing weight is arranged behind the anti-side key;

[0117] The following constraints must be met to determine the horizontal X-axis and vertical Y-axis positions:

[0118] Arrange it on the extension line of the corner endpoint of the mold center and the boundary of the pressing surface to ensure that the distance between the component and the corner endpoint is greater than 20mm; move the conical balancing block inward along the long side direction of the pressure ring to avoid other components, and ensure that the distance between the conical balancing block component and other components such as the balancing block is greater than 10mm; the coordinates are taken as multiples of 5 and still meet the above conditions; determine whether there is a casting hook ear, if so, move it in the length direction of the pressure ring to avoid it by more than 10mm; the corner position of the special-shaped sheet is determined by the intersection of the diagonal of the balancing block containing box and the sheet line.

[0119] The following constraints must be met to determine the vertical Z-axis position: the mounting surface of the balancing block is 10 mm higher than the upper panel of the pressure ring; take a multiple of 5.

[0120] The placement angle must meet the following constraints: parallel to the long side of the pressure ring containing box.

[0121] If it is a side guide, the following constraints must be met to determine the position of the horizontal X-axis and the vertical Y-axis:

[0122] It is arranged on the inner side of the first balancing block on this side, and moves along the corresponding coordinate axis on that side to avoid the positioning plate. The minimum distance between the guide plate sliding surface and the pressing surface contour is greater than 100mm, and the distance between the anti-side guide assembly and the balancing block and positioning plate assembly is greater than 10mm. The middle anti-side guide plates are evenly distributed to avoid the balancing block and the positioning plate. The coordinates are taken as multiples of 5 and still meet the above conditions.

[0123] The following constraints must be met to determine the vertical Z-axis position: ensure that the minimum height of the anti-side guide plate assembly = guide sliding surface + retracting tool; in this embodiment, the preferred minimum height of the anti-side guide plate assembly is 80mm, the guide sliding surface is 50mm, and the retracting tool is 30mm; take multiples of 5 and round up.

[0124] The placement angle must meet the following constraints: the guide surface faces inward and is parallel to the side on which it is located.

[0125] Determine whether the fender conforming information in the planning form is conforming. If so, construct the fender and position the layout according to the fender conforming information in the planning form and the corresponding constraints. Otherwise, determine the blank holder structure style. If it is a three-layer structure design, perform the blank holder main body design. If it is a box-type structure design, obtain the outer contour line of the blank holder.

[0126] S36, generating a blank holder body according to the outer contour of the blank holder;

[0127] S37, respectively obtain the guide component information, travel limit component information, lifting and flipping component information, pier dead block component information and rib plate information of the blank holder in the planning form and the corresponding constraints, generate the guide component, travel limit component, lifting and flipping component and pier dead block component on the blank holder body in turn, and arrange the rib plate; complete the blank holder generation.

[0128] Among them, in the guide component structure, first determine whether it is an inner pressure ring or an outer pressure ring design. If it is an inner pressure ring, obtain the punch guide plate information, sum and difference, and the process ends; if it is an outer pressure ring, continue to determine whether to arrange the inner guide plate, if so, obtain the punch guide plate information, sum and difference, if not, continue to determine whether to arrange the outer guide plate, if arranged, arrange the outer guide plate, if not, the process ends.

[0129] Specifically, arranging the outer guide plate includes the following steps:

[0130] The guide plate length is determined according to the blank holder stroke. If the blank holder stroke is <100mm, the guide plate length is configured to 100mm. If it is 100mm≤blank holder stroke≤150mm, the guide plate length is configured to 125mm. If the blank holder stroke is ≥150mm, the guide plate length is configured to 150mm, and the thickness of the guide plate is configured to 20mm in each interval. Then determine the guide form. If it is a four-corner guide, the process ends. If it is a four-sided guide, the number of side guides is determined according to the outer contour length of the blank holder. If the outer contour length of the blank holder is <500, the number of side guides is determined to be 1. If it is 500≤blank holder stroke If the outer contour length is <2000, the number of side guide plates is determined to be 2. If the outer contour length of the pressure ring is >2000, the number of side guide plates is determined to be 3. Then the width of the guide plates is determined, and the following constraints should be met: the total width of the single-sided guide plates is greater than 15% to 25% of the outer contour length of the pressure ring on that side, and each guide plate has the same width; when the maximum number and maximum width cannot meet this requirement, the guide plate with the maximum width is called and a prompt is displayed that "the guide plate with the maximum width has been called, but the requirement of ≥15% is still not met"; the guide plate specifications are determined, and the standard guide plate of appropriate width is determined according to the number, length and thickness of the single-sided guide plates, the guide plate layout position is determined, and the guide plate assembly is generated.

[0131] Determine the guide plate layout to meet the following constraints:

[0132] The following constraints should be met in the transverse position: the distance between the guide plate and the lowest point of the outer contour of the upper surface of the pressure ring body, all guide plates are of the same height, and the coordinate value is taken as small as a multiple of 5.

[0133] In this embodiment, the distance between the guide plate and the lowest point of the outer contour of the upper surface of the blank holder ring body is 30 mm;

[0134] The following constraints should be met in the horizontal position: arrange the guide plate at a distance from the corner of the outer contour, and avoid the hook and ear space if there is a cast hook and ear assembly; if the flip style is a hook, the distance between the left and right guide plates and the boundary of the outer contour corner = the hook difference width + guide plate w / 2 + 30; the center coordinate of the guide plate is rounded to 5; if there are 3 guide plates on this side, the middle guide plate is evenly distributed in the middle of the guide plates on both sides; the guide plate installation surface protrudes 10mm from the outer contour surface of the blank holder ring. If the installation position is not parallel to the X and Y axes, ensure that it protrudes at least 10mm from the outer contour surface of the blank holder ring.

[0135] Placement angle: The front and rear guide plates in the feeding direction are always parallel to the X-axis, and the left and right guide plates in the feeding direction are always parallel to the Y-axis; the guide plate baffle faces upward.

[0136] It should be noted that the maximum contour of the blank holder body is constrained by the push rod legs, balance blocks, positioning plates, side-protection components and / or lifting ears that affect the position of the blank holder profile; then the blank holder body is generated according to the maximum contour of the blank holder body, wherein, since each component jointly constrains the maximum contour of the blank holder body, this helps to ensure the accuracy of the blank holder during the manufacturing process. The synergy of each component can reduce manufacturing errors and improve the accuracy of the mold, thereby ensuring the accuracy and quality of the final product, and the blank holder is planned and constructed based on the punch, and the corresponding size can be accurately determined to reduce the mold manufacturing cost.

[0137] The present invention also provides a system for generating a drawing die for an automobile panel, including the above-mentioned method for generating a drawing die for an automobile panel, the system comprising:

[0138] Import module, used to input process digital model;

[0139] A planning module, used to construct a planning form, in which the information and constraints of various components of the drawing die to be generated are set;

[0140] The construction module is used to pre-process the process digital model according to the planning form and generate a three-dimensional structural model of the automobile cover drawing die.

[0141] In addition, it should be noted that the device embodiments described above are merely illustrative and do not limit the scope of protection of the present invention. In practical applications, technicians in this field can select some or all of the modules according to actual needs to achieve the purpose of the present embodiment, and no restrictions are made here.

[0142] In addition, for technical details that are not described in detail in this embodiment, reference can be made to the method for generating a drawing die for an automobile panel provided in any embodiment of the present invention, and will not be repeated here.

[0143] In addition, the present invention provides a computer medium, which is a computer medium, and stores a program for generating a method for generating a drawing die for an automobile cover. When the program for generating a drawing die for an automobile cover is executed by a processor, the steps of the method for generating a drawing die for an automobile cover as described above are implemented.

[0144] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for generating a drawing die for an automobile panel, characterized in that: The following steps are involved: S1, inputting a process digital model, wherein the process digital model includes defining a process profile, a parting line, a bevel line, a gravity line, a machine tool ejector, a blank line, a concave mold profile, a convex mold profile, and a blank holder profile; S2, constructing a planning form, wherein the planning form is provided with information and constraints of various components of the drawing die to be generated, wherein the drawing die includes a punch, a die and a blank holder ring component, and the planning form includes a system planning table and a layout planning table, wherein the system planning table includes the structural form, main structure information, installation component information, guide plate component information, positioning component information and lifting component information of various components of the die to be generated; and the layout planning table includes layout constraints of various components of the die to be generated; The system planning table includes the structure form of the punch to be generated, the main structure information, the installation component information, the guide plate component information, the positioning component information and the lifting component information, wherein: The main structure information includes the wall thickness, characteristic rib thickness, free rib thickness and auxiliary rib thickness; The installation component information includes the main installation form, installation manufacturer, whether the parting line is arranged, installation information, installation screw specifications, pin installation manufacturer, quantity and specifications; The guide plate assembly information includes the guide plate assembly form, whether a double-layer guide plate is arranged, and the guide plate manufacturer information; The positioning component information includes the type of the positioning component, the manufacturer of the positioning component, the quantity and specifications, and the types of the positioning component include an inner key, an outer key and a mushroom pin; Lifting component information includes lifting structure information, lifting cast-in bolt component manufacturers, lifting threaded hole component manufacturers, CH standard parts manufacturers and specifications, and half-moon positioning standard parts manufacturers and specifications; S3, pre-processing the process digital model according to the planning form to generate a three-dimensional structural model of the automobile panel drawing die; Step S3 includes the following sub-steps: S31, for the main body design of the punch, according to the main structure information in the planning form and the corresponding constraints, the mold surface wall, the follow-up ribs, the auxiliary ribs and the characteristic ribs of the punch are constructed; S32, designing the profile standard parts of the punch, obtaining the positioning component information and the corresponding constraint conditions in the planning form, and positioning and arranging the positions of the inner key, the outer key and the mushroom pin, wherein the constraints for the positioning and arranging of the positions of the inner key, the outer key and the mushroom pin are the same; S33, obtaining the guide plate component information and corresponding constraint conditions in the planning form, and positioning and arranging the guide plate of the punch; S34, obtain the punch structure form, the punch structure form includes an integral design and a split design. If it is judged to be an integral design, the three-dimensional model structure of the punch is output. If it is a split design, the information of the punch installation component, lifting component and positioning component in the planning form and the corresponding constraints are obtained, the installation component, lifting component and positioning component of the punch are positioned and laid out, and the three-dimensional model structure of the punch is output.

2. The method for generating a drawing die for an automobile panel according to claim 1, characterized in that: The main body design of the punch in step S31 is to construct the punch's profile wall, free-form ribs, auxiliary ribs and characteristic ribs according to the main body structure information and corresponding constraints in the planning form, which includes the following sub-steps: S311, obtaining the profile wall thickness information and corresponding constraint conditions in the planning form, constructing the profile wall of the punch, calculating the minimum height of each component, and selecting a die structure that can match the punch according to the minimum height of the punch; S312, determining the features of the punch's conformal rib and cutting edge according to the parting line, obtaining conformal rib thickness information and corresponding constraint conditions in the planning form, and constructing the conformal rib of the punch; S313, obtaining characteristic rib information in the planning form, determining whether characteristic rib thickness information is selected or input, if yes, obtaining characteristic rib thickness information and corresponding constraint conditions, constructing characteristic ribs of the punch, reinforcing the conforming ribs and characteristic ribs, and avoiding the auxiliary ribs, if no, proceeding to step S314; S314, obtaining the auxiliary reinforcement thickness information and corresponding constraint conditions in the planning form, and constructing the auxiliary reinforcement of the punch.

3. The method for generating a drawing die for an automobile panel according to claim 1, characterized in that: The step S32 is to design the standard parts of the punch profile, obtain the positioning component information and the corresponding constraints in the planning form, and perform positioning layout on the positions of the inner key, the outer key and the mushroom pin. The constraints for the positioning layout of the inner key, the outer key and the mushroom pin are the same, which includes the following sub-steps: S321, obtaining the number of internal keys in the planning form, if the number of internal keys is 0, then directly end and execute step S33; if the number of internal keys is 3, then execute step S322; if the number of internal keys is 4, then directly execute step S323; S322, according to the parting line of the punch, obtain the punch parting line containing box, and obtain the transverse length L X and the longitudinal length L Y ; If L X ≥L Y , two inner keys are arranged in the transverse direction and one inner key is arranged in the longitudinal direction, wherein the inner key in the longitudinal direction is arranged on the side far from the center position of the punch housing box, and step S324 is executed; otherwise, one inner key is arranged in the transverse direction and two inner keys are arranged in the longitudinal direction, wherein the inner key in the transverse direction is arranged on the side far from the center position of the punch housing box, and step S324 is executed; S323, arrange two inner keys in both the horizontal direction and the vertical direction, and execute step S324; S324, determine the vertical position of the inner key, arrange the inner key at the center line of the punch, the intersection of the center line of the inner key and the parting line of the component is the starting position of the inner key, the other end faces the origin of the coordinate system, and the inner key is always parallel to the coordinate axis, the inner keys on both sides of the same orientation are on the same straight line, and the vertical direction of the inner key is on both sides of the punch installation surface; S325, determining the plane position of the positioning inner key, wherein it is determined whether the push rod is on the coordinate axis. If so, the inner key is placed at a position 75 mm away from the coordinate axis. If not, the center line of the inner key is placed on the coordinate axis and avoids the position of the mounting assembly. The standard part on the mounting assembly cannot exist in the same axial direction as the inner key. If so, the inner key is placed at a position 75 mm away from the coordinate axis. S326, output the internal key position positioning coordinates.

4. The method for generating a drawing die for an automobile panel according to claim 1, characterized in that: The step S3 also includes generating the structure of the blank holder, which includes the following sub-steps: S35, the planning form also includes the push rod leg assembly information, balance block assembly information, positioning plate assembly information, anti-side assembly information, fender follow-up information, lifting lug information, push rod guide assembly information, travel limit assembly information, lifting and flipping assembly information, pier dead block assembly information and rib plate information of the blank holder ring, and the outer contour line of the blank holder ring is jointly constrained according to the push rod leg assembly information, balance block assembly information, positioning plate assembly information, anti-side assembly information, fender follow-up information and lifting lug information in the planning form; S36, generating a blank holder body according to the outer contour of the blank holder; S37, respectively obtain the guide component information, travel limit component information, lifting and flipping component information, pier dead block component information and rib plate information of the blank holder in the planning form and the corresponding constraints, generate the guide component, travel limit component, lifting and flipping component and pier dead block component on the blank holder body in turn, and arrange the rib plate; complete the blank holder generation.

5. A system for generating a drawing die for an automobile panel, used to implement the method for generating a drawing die for an automobile panel according to any one of claims 1 to 4, characterized in that: The system comprises: An import module is used to input a process digital model, wherein the process digital model includes a defined process profile, a parting line, a bevel line, a gravity line, a machine tool ejector, a blank line, a concave mold profile, a convex mold surface, and a blank holder profile; A planning module is used to construct a planning form, wherein the planning form is provided with information and constraints of various components of the drawing die to be generated, wherein the drawing die includes a punch, a die and a blank holder ring component, wherein the planning form includes a system planning table and a layout planning table, wherein the system planning table includes the structural form, main structure information, installation component information, guide plate component information, positioning component information and lifting component information of various components of the die to be generated; wherein the layout planning table includes layout constraints of various components of the die to be generated; The system planning table includes the structure form of the punch to be generated, the main structure information, the installation component information, the guide plate component information, the positioning component information and the lifting component information, wherein: The main structure information includes the wall thickness, characteristic rib thickness, free rib thickness and auxiliary rib thickness; The installation component information includes the main installation form, installation manufacturer, whether the parting line is arranged, installation information, installation screw specifications, pin installation manufacturer, quantity and specifications; The guide plate assembly information includes the guide plate assembly form, whether a double-layer guide plate is arranged, and the guide plate manufacturer information; The positioning component information includes the type of the positioning component, the manufacturer of the positioning component, the quantity and specifications, and the types of the positioning component include an inner key, an outer key and a mushroom pin; Lifting component information includes lifting structure information, lifting cast-in bolt component manufacturers, lifting threaded hole component manufacturers, CH standard parts manufacturers and specifications, and half-moon positioning standard parts manufacturers and specifications; The construction module is used to pre-process the process digital model according to the planning form and generate a three-dimensional structural model of the automobile panel drawing die; For the main body design of the punch, according to the main structure information in the planning form and the corresponding constraints, the punch's mold wall, follow-up ribs, auxiliary ribs and characteristic ribs are constructed; For the design of the standard parts of the punch surface, the positioning component information and the corresponding constraint conditions in the planning form are obtained, and the positions of the inner key, the outer key and the mushroom pin are positioned and arranged, and the constraint conditions for the positioning and arrangement of the positions of the inner key, the outer key and the mushroom pin are the same; Obtain the guide plate component information and corresponding constraints in the planning form, and position and layout the guide plate of the punch; The punch structure form is obtained, and the punch structure form includes an integral design and a split design. If it is judged to be an integral design, the three-dimensional model structure of the punch is output. If it is a split design, the information of the punch installation component, the lifting component and the positioning component in the planning form and the corresponding constraints are obtained, the installation component, the lifting component and the positioning component of the punch are positioned and laid out, and the three-dimensional model structure of the punch is output.

6. An electronic device, characterized in that: The electronic device includes: a memory, a processor, and a method program for generating a drawing die for an automobile cover part stored in the memory and executable on the processor, wherein the method program for generating a drawing die for an automobile cover part is configured to implement the steps of the method for generating a drawing die for an automobile cover part as described in any one of claims 1 to 4.

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