A die casting machine mold plate CAE analysis method

Abstract

The application discloses a die casting machine template CAE analysis method, comprising the following steps: step A: three-dimensional models of a head plate, a middle plate and a tail plate are respectively established; step B: each three-dimensional model is respectively standardized and simplified, non-influential geometric features are compressed, and the size of corresponding features is adjusted according to standard parameters; step C: the simplified models are assembled, relevant matching parts are added, an assembly model of the head plate and the middle plate and an assembly model of the tail plate are constructed, and after interference checking is correct, corresponding model files are exported; step D: each model file exported is imported into CAE analysis software, and corresponding material parameters, contact forms and boundary conditions are set; and step E: statics analysis is carried out through the CAE analysis software, and stress and deformation results are extracted. By adopting assembly body integral analysis, corresponding material parameters, contact forms and boundary conditions are set, stress distribution and deformation states of the template are more accurately reflected, and the reliability of CAE simulation results is improved.

Description

Technical Field

[0001] This application relates to the field of die casting machine technology, and in particular discloses a CAE analysis method for die casting machine templates. Background Technology

[0002] With industrial development, the requirements for the quality and production efficiency of die-casting products are constantly increasing. Die-casting machine templates need to have higher precision and rigidity. Traditional design methods mainly rely on experience-based design and physical experiments, which are costly and time-consuming. CAE analysis technology can optimize the design and improve performance. Virtual simulation can reduce the number of experiments, thereby reducing R&D costs and time. In addition, with the widespread application of new materials in die-casting machine templates, CAE analysis technology can simulate the performance of materials under different working conditions, assisting in the rational selection of materials and process formulation. In the current highly competitive die-casting industry, CAE analysis technology has become an important means for enterprises to optimize template design and enhance product competitiveness.

[0003] However, the traditional method for analyzing die-casting machine molds involves analyzing a single mold template, fixing the mortise and tenon nut imprint surface, and applying force to the contact surface between the mold and the head plate. This method shows stress concentration on the fixed mortise and tenon nut surface, failing to accurately reflect the stress distribution of the head plate. Furthermore, the deformation of the mold surface is limited by the fixed support, resulting in a significant discrepancy between the actual head plate deformation and the simulation results, making it difficult to match reality. In addition, there is no unified standard for simplifying the three main plates—head plate, middle plate, and tail plate—leading to different simplification methods for the same mold by different designers, resulting in significant differences in analysis results and causing inconvenience for communication among designers. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this application is to provide a CAE analysis method for die casting machine templates.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a CAE analysis method for die-casting machine templates, comprising the following steps: Step A: establishing three-dimensional models of the head plate, middle plate, and tail plate respectively; Step B: standardizing and simplifying each three-dimensional model, compressing insignificant geometric features, and adjusting the dimensions of the corresponding features according to standard parameters; Step C: assembling the simplified models, adding relevant mating parts, constructing assembly models of the head plate, middle plate, and tail plate, and exporting the corresponding model files after interference checks are completed; Step D: importing the exported model files into CAE analysis software, and setting the corresponding material parameters, contact forms, and boundary conditions; Step E: performing static analysis using CAE analysis software and extracting stress and deformation results.

[0006] As a preferred option, in step B, the three-dimensional model of the head plate is standardized and simplified. The specific operation steps include: step b11: retain the moving surface at the mold surface; step b12: set the diameter of the gatepost hole to be 1mm larger than the gatepost on one side; step b13: compress the stamped features at the bottom of the head plate and delete the variable cross-section protruding part on the gatepost nut; step b14: change the internal thread feature of the gatepost nut to an internal hole with the same diameter as the gatepost.

[0007] As a preferred option, in step B, the three-dimensional model of the middle plate is standardized and simplified. The specific operation steps include: Step b21: retain the moving surface at the mold surface; Step b22: merge the copper sleeve of the gob hole with the middle plate, and adjust the diameter of the gob hole to be equal to the diameter of the gob; Step b23: compress the steel stamp feature at the bottom of the middle plate; Step b24: retain the actual machining dimensions of the end face of the hinge hole; Step b25: merge the steel sleeve in the long hinge connecting hole with the long hinge, and adjust the inner diameter to be equal to the diameter of the large hinge edge; Step b26: adjust the dimensions of the mold, wherein the outer dimension is adjusted to 80% of the inner distance of the gob hole, and the thickness is adjusted to the average of the maximum mold opening size and the minimum mold opening size.

[0008] As a preferred option, in step B, the three-dimensional model of the tail plate is standardized and simplified. The specific operation steps include: step b31: compress the threaded hole and the stamped features at the bottom of the tail plate, and delete the protruding part of the variable cross section on the tie rod nut; step b32: set the diameter of the tie rod hole to be 1mm larger than the tie rod on one side; step b33: change the internal thread feature of the adjusting nut to an inner hole with the same diameter as the tie rod; step b34: retain the actual machining dimensions of the end face of the hinge hole and the inner hole.

[0009] As a preferred embodiment, in step C, the assembly of the head plate and the middle plate is performed according to the angle between the long hinge and the horizontal plane when the mold is actually locked in place, and the mold is fitted to the center position of the head plate and the middle plate; the assembly of the tail plate is performed according to the angle between the hook hinge and the horizontal plane when the mold is actually locked in place.

[0010] As a preferred embodiment, in step C, the parts in the assembly model of the head plate and the middle plate include the head plate, the middle plate, the mold, the gatepost, the gatepost nut, the large hinge edge, and the long hinge; the parts in the assembly model of the tail plate include the tail plate, the gatepost, the adjusting nut, the hinge edge, the hook hinge, and the side hinge.

[0011] As a preferred option, in step D, each model file is imported into the statics module, and the hinge edges connecting the long hinge and the hook hinge, as well as the hinge edges connecting the hook hinge, the side hinge, and the long hinge are drawn in SPACECLAIM. The part surfaces are divided using SPACECLAIM, and the angle during mold clamping is converted into the percentage occupied by the dividing line to determine the single surface under stress. At the same time, the mold surfaces of the head plate and the middle plate are divided into internal surfaces along the center of the goring post.

[0012] As a preferred option, the material parameters in step D are set as follows: the material of the tie bar and adjusting nut is 42CrMo; the material of the head plate, middle plate, tail plate, mold, long hinge, side hinge and hook hinge is QT500-7; the material of the tie bar nut is 45 steel; and the material of the hinge edge and large hinge edge is 38CrMoAl.

[0013] As a preferred embodiment, the contact forms in step D include bonded contact and non-separating contact. The assembly models of the head plate and the middle plate have a total of 21 contact pairs, and the assembly models of the tail plate have a total of 24 contact pairs. The contact forms between the molds are non-separating contact, the contact forms between the tie rod and the tie rod hole of the middle plate are non-separating contact, and the contact forms between the remaining parts are all bonded contact.

[0014] As a preferred option, the boundary condition in step D is set to fix the far end face of the tie rod, and the nominal clamping force is evenly distributed and applied to the divided hinge semicircular surfaces respectively, with the direction of the force pointing to one side of the mold along the edge of the long hinge.

[0015] As a preferred option, in step E, after completing the static analysis, the equivalent stress cloud diagram of a single part is extracted, and the directional deformation of the middle plate and tail plate is extracted to observe the expansion of the hinge lug; the deformation of the head plate and middle plate mold surface is reflected by extracting the difference in the deformation of the internal surface to reflect the actual displacement.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: (1) This application adopts the overall analysis of the assembly including the head plate, middle plate, tail plate and related parts. By simulating the contact and interaction between the parts under the actual mold-locking state, and setting the corresponding material parameters, contact forms and boundary conditions that conform to the real working conditions, the stress concentration illusion caused by the analysis of a single template in the prior art is avoided. This method can more realistically and accurately reflect the stress distribution and deformation state of the template under actual force, and significantly improve the reliability of CAE simulation results.

[0017] (2) This application standardizes and simplifies each three-dimensional model separately, solidifies the simplification standard, establishes a unified pre-processing specification, effectively solves the problem of inconsistent model simplification caused by the difference in understanding of designers, ensures the high degree of uniformity of the models built by different personnel for the same analysis object, and the analysis results obtained have good consistency and repeatability, which facilitates technical communication among designers and improves the efficiency of R&D collaboration. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating a CAE analysis method for die-casting machine templates according to the present invention.

[0019] Figure 2These are comparison images of the headplate before and after simplification according to the present invention. The left side is the unsimplified headplate, and the right side is the simplified headplate.

[0020] Figure 3 These are comparison images of the middle plate before and after simplification according to the present invention. The left side is the unsimplified middle plate, and the right side is the simplified middle plate.

[0021] Figure 4 This is a comparison diagram of the tailplate before and after simplification according to the present invention. The left side is the unsimplified tailplate, and the right side is the simplified tailplate.

[0022] Figure 5 This is a simplified schematic diagram of the head plate and middle plate assembly of the present invention.

[0023] Figure 6 This is a simplified schematic diagram of the tailgate assembly of the present invention.

[0024] Figure 7 This is a schematic diagram of the headplate and middleplate assembly of the present invention after processing in SPACECLAIM.

[0025] Figure 8 This is a schematic diagram of the tailplate assembly of the present invention after processing in SPACECLAIM.

[0026] Figure 9 This is a schematic diagram of the contact pair design in the head plate and middle plate assembly of the present invention.

[0027] Figure 10 This is a schematic diagram illustrating the analysis of boundary conditions in the headplate and middleplate assembly of the present invention.

[0028] Figure 11 This is a schematic diagram of the contact pair design in the tailplate assembly of the present invention.

[0029] Figure 12 This is a schematic diagram illustrating the analysis of boundary conditions in the tailplate assembly of the present invention.

[0030] Figure 13 This is a schematic diagram of the stress results of the head plate in this invention.

[0031] Figure 14 This is a schematic diagram of the stress results of the middle plate in this invention.

[0032] Figure 15 This is a schematic diagram of the stress results of the tail plate of the present invention.

[0033] Figure 16 This is a schematic diagram of the deformation extraction results of the headplate mold surface according to the present invention.

[0034] Figure 17 This is a schematic diagram of the deformation extraction results of the middle plate mold surface in this invention.

[0035] Figure 18This is a schematic diagram of the directional deformation result of the middle plate in this invention.

[0036] Figure 19 This is a schematic diagram of the directional deformation result of the tail plate according to the present invention. Detailed Implementation

[0037] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0038] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0039] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0040] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0041] A preferred embodiment of this application, such as Figure 1 As shown, a CAE analysis method for die-casting machine templates includes the following steps: Step A: Create 3D models of the head plate, middle plate, and tail plate respectively; This step is the foundation and prerequisite for CAE analysis. It aims to accurately construct digital 3D models of the three core templates of the die-casting machine in CAD software based on actual design drawings or survey data. It is important to note that the modeling process must strictly follow the engineering drawings and accurately reproduce all geometric features, including mold surfaces, tie rod holes, hinge holes, threaded holes, reinforcing ribs, and stamped markings. The geometric accuracy of the model directly affects the quality of subsequent mesh generation and the reliability of simulation results.

[0042] Step B: As Figures 2 to 4 As shown, each 3D model is standardized and simplified, and geometric features that have no impact are compressed and the dimensions of the corresponding features are adjusted according to standard parameters.

[0043] The specific steps for standardizing and simplifying the 3D model of the headplate include: Step b11: Retain the moving surface at the mold surface; Step b12: Set the diameter of the gatepost hole to be 1mm larger on each side than the gatepost; Step b13: Compress the stamped features at the bottom of the head plate and remove the protruding part with variable cross-section on the tie rod nut; Step b14: Change the internal thread feature of the gatepost nut to an internal hole with the same diameter as the gatepost.

[0044] The specific steps for standardizing and simplifying the 3D model of the middle plate include: Step b21: Retain the moving surface at the mold surface; Step b22: Merge the copper sleeve of the gatepost hole with the middle plate, and adjust the diameter of the gatepost hole to be equal to the diameter of the gatepost; Step b23: Compress the stamped features on the bottom of the middle plate; Step b24: Retain the actual machining dimensions of the end face of the hinge hole; Step b25: Connect the steel rod in the long hinge connection hole to the long hinge, and adjust the inner hole diameter to be equal to the diameter of the large hinge side; Step b26: Adjust the mold dimensions, where the outer dimensions are adjusted to 80% of the inner distance of the gatepost holes, and the thickness is adjusted to the average of the maximum and minimum mold opening dimensions.

[0045] The specific steps for standardizing and simplifying the 3D model of the tailgate include: Step b31: Compress the threaded hole and the stamped features at the bottom of the tail plate, and remove the protruding part of the variable cross-section on the tie rod nut; Step b32: Set the diameter of the gatepost hole to be 1mm larger on each side than the gatepost; Step b33: Change the internal thread feature of the adjusting nut to an inner hole with the same diameter as the gatepost; Step b34: Retain the actual machining dimensions of the hinge hole end face and the inner hole.

[0046] By standardizing and simplifying each 3D model as described above, the simplification standard is solidified, a unified preprocessing specification is established, and the problem of inconsistent model simplification caused by differences in designers' understanding is effectively solved. This ensures a high degree of consistency in the models built by different personnel for the same analysis object, resulting in analysis results with good consistency and repeatability. It also facilitates technical communication among designers and improves the efficiency of R&D collaboration.

[0047] The 1mm enlargement of the goblin hole on one side is a simulation of non-interference fit. In actual assembly, there is a small gap between the goblin and the template hole to ensure smooth movement. In CAE analysis, if it is set to a completely fitted contact, it may lead to local stress singularity or convergence difficulty. Setting a 1mm gap on one side, and in conjunction with the subsequent definition of non-separation contact, can more realistically simulate the mechanical contact behavior of actual small gaps, avoid false stress concentration, and make the force transmission more in line with reality.

[0048] Features such as stamped steel and variable cross-section protrusions of goblin nuts have minimal impact on the overall structural stiffness and stress distribution, but they significantly increase the number of meshes, reduce mesh quality, and prolong computation time. These features are usually required for process or installation and are not the main load-bearing structures. Simplification and compression can obtain a cleaner geometric model that is more suitable for high-quality mesh generation, thereby improving computational efficiency while ensuring analysis accuracy.

[0049] The geometry of threads is very complex, and performing accurate 3D modeling and meshing is extremely resource-intensive and has little impact on the overall stress-strain analysis. Simplifying it into a smooth inner hole with the same diameter as the gatepost and defining the contact relationship as bonded contact is an equivalent mechanical simplification, which is an efficient simplification strategy that meets engineering accuracy requirements.

[0050] The copper bushing, as a bushing, has an interference or tight fit with the middle plate. In actual work, the two can be regarded as a whole and deform together. Merging them into a single geometry avoids the need to define the complex contact relationship between them, simplifies the model, and conforms to their mechanical behavior. The same principle applies to merging the steel bushing and the long hinge.

[0051] Since molds vary greatly, a representative standard mold must be used for analysis. An equivalent mold is defined by taking 80% of the inner distance of the gate post hole as the outer dimension and the average value of the mold opening range as the thickness. The lever arm and load distribution generated by the mold of this size are statistically representative, so that the analysis results of the template can cover most working conditions and enhance the universality and comparability of the analysis scheme.

[0052] Step C: As Figures 5 to 8 As shown, the simplified model is assembled, and relevant mating parts are added to build the assembly models of the head plate, middle plate, and tail plate. After interference checks are performed and the corresponding model files are exported. The assembly of the head plate and the middle plate should be based on the angle between the long hinge and the horizontal plane when the mold is actually locked in place. The mold should be fitted to the center position of the head plate and the middle plate. The datum plane should not be used for fitting, otherwise it will affect the subsequent analysis results. The assembly of the tail plate should be based on the angle between the hook hinge and the horizontal plane when the mold is actually locked in place.

[0053] The parts in the assembly model of the head plate and middle plate include the head plate, middle plate, mold, gatepost, gatepost nut, large hinge edge, and long hinge; the parts in the assembly model of the tail plate include the tail plate, gatepost, adjusting nut, hinge edge, hook hinge, and side hinge.

[0054] The analysis model not only includes the template itself, but also incorporates the mold, tie rods, a complete set of locking hinges, and adjusting nuts. This achieves an improvement from single-part analysis to overall system analysis. This analysis method can consider the interaction between parts, load transmission path, and system compatibility deformation, and more realistically reflects the transmission process of the complete path of the locking force at the moment of mold clamping, as well as the mutual influence of each part in this process, making the prediction of template stress and deformation more realistic.

[0055] After assembly, export the model file as x_t or STEP format.

[0056] Step D: As Figures 9 to 12 As shown, import the exported model files into the CAE analysis software and set the corresponding material parameters, contact forms, and boundary conditions. Importing each model file into the statics module requires drawing the hinge edges connecting the long hinge and the hook hinge, as well as the hinge edges connecting the hook hinge, the side hinge, and the long hinge in SPACECLAIM. Otherwise, the initial segmentation position will be inaccurate. Geometrically, the contact surface between the hinge and the hinge edge must be clearly created. This ensures that the clamping force is applied accurately to the actual stress area, i.e., the semi-cylindrical surface of the hinge edge.

[0057] The part surface is divided by SPACECLAIM, and the angle during clamping is converted into the percentage occupied by the dividing line to determine the single surface under force. The clamping force is transmitted along the hinge centerline. By converting the clamping angle into the position of the dividing line on the hinge cylindrical surface, the range of the force surface can be accurately determined, ensuring that the position and direction of the load are completely consistent with the mechanical principles.

[0058] Simultaneously, the mold surfaces of the head plate and middle plate are divided into internal surfaces along the center of the girdle to facilitate subsequent deformation extraction. The mold surface is divided along the center of the girdle to create an internal annular or regional surface. Subsequently, by extracting the displacement difference between the inner and outer nodes of this divided surface, the deformation of the mold surface under clamping force can be directly obtained. This is a more intuitive and engineering-significant evaluation indicator than the overall displacement cloud map.

[0059] The material parameters in step D are set as follows: the material of the tie bar and adjusting nut is 42CrMo; the material of the head plate, middle plate, tail plate, mold, long hinge, side hinge and hook hinge is QT500-7; the material of the tie bar nut is 45 steel; the material of the hinge edge and large hinge edge is 38CrMoAl.

[0060] The contact types in step D include bonded contact and non-separating contact. The assembly models of the head plate and the middle plate have a total of 21 contact pairs, and the assembly models of the tail plate have a total of 24 contact pairs. The contact type between the molds is non-separating contact, the contact type between the gatepost and the gatepost hole of the middle plate is non-separating contact, and the contact type between the remaining parts is bonded contact.

[0061] Specifically, the head plate and the end face of the gatepost nut are in bonded contact; the gatepost and the inner hole of the gatepost nut are in bonded contact; the mold is in bonded contact with the head plate and the middle plate mold face respectively; there is no separation contact between the molds; the gatepost and the gatepost hole of the middle plate are in no separation contact; the middle plate hinge lug and the hinge edge are in bonded contact; the hinge edge and the inner hole face of the long hinge are in bonded contact; the tail plate and the end face of the adjusting nut are in bonded contact; the gatepost and the inner hole of the adjusting nut are in bonded contact; the tail plate hinge lug hole and the hinge edge are in bonded contact; the side hinge and the hook hinge are in bonded contact with the inner hole face of the hinge edge.

[0062] Bonded contact is used to simulate connections such as bolted connections, interference fits, or welding, where it is assumed that relative separation or slippage will not occur during the analysis, such as between the nut end face and the template, or between the hinge edge and the hinge lug hole. It bonds these parts together on the contact surface, sharing nodes and achieving complete force transmission. Non-separation contact is used to simulate connections that allow for slight slippage or separation but always remain in contact, such as between mold parting surfaces, or between the tie pillar and the middle plate hole. This type of contact is more consistent with the actual conditions of these interfaces having lubrication, slight movement, or gaps, and is more relaxed than bonded contact and more easily convergent than frictional contact.

[0063] In step D, the boundary conditions are set to fix the far end face of the tie column, and the nominal clamping force is evenly distributed and applied to the divided hinge semicircular surfaces. The direction of the force is along the edge of the long hinge towards the mold side. In the actual machine, the other end of the tie column is fixed by the frame. This constraint simulates the rigid support of the frame on the tie column, providing the necessary constraint for the entire force system and preventing rigid body displacement. The clamping force is evenly distributed on the hinge semicircular surface, which is a major improvement in the load application method. The traditional method applies the force directly to the template, while this method divides the nominal clamping force and applies it as a surface pressure to the bearing semicircular surface of the hinge that drives the hinge movement. The direction of the force is strictly along the axis of the hinge member. This accurately simulates the real input point and input direction of the clamping force, which is one of the most critical settings for obtaining an accurate template stress state.

[0064] Step E: As Figures 13 to 19 As shown, static analysis was performed using CAE analysis software, and stress and deformation results were extracted.

[0065] Based on the finite element model established above, the displacement, strain, and stress of the entire assembly system under given boundary conditions and loads are solved. It assumes that the material is linearly elastic and the deformation is small, which is accurate and efficient enough for checking the stiffness and strength of the die-casting machine template under normal working loads.

[0066] After completing the static analysis, the equivalent stress cloud diagram of a single part is extracted, and the directional deformation of the middle plate and tail plate is extracted to observe the expansion of the hinge lugs; the deformation of the head plate and middle plate mold surfaces is reflected by extracting the difference in deformation of the internal surfaces to reflect the actual displacement.

[0067] Equivalent stress cloud diagrams are used to assess the strength of templates. By observing the stress cloud diagrams of the head plate, middle plate, and tail plate, the maximum stress area can be quickly located, and it can be determined whether it exceeds the yield strength of the material. This provides a direct basis for structural optimization, such as increasing the thickness and arranging reinforcing ribs.

[0068] The hinge lug is a key component that bears the force of the hinge pin. Its deformation, especially the amount of outward expansion, directly affects the fitting accuracy and wear life of the pin. Extracting the directional deformation of the hinge lugs of the middle plate and tail plate can quantitatively assess whether the stiffness of the hinge lug is sufficient.

[0069] This method constructs a complete, reliable, and efficient CAE analysis specification for die-casting machine templates by standardizing and simplifying models, systematically assembling the whole system, and setting up settings that fit real working conditions. It not only significantly improves the consistency and accuracy of simulation results, reduces physical trial and error costs, and shortens the R&D cycle, but more importantly, it transforms CAE analysis from relying on expert experience into an engineering technology that can be executed in a standardized manner, with traceable and comparable results, greatly enhancing the maturity and core competitiveness of enterprises' digital R&D.

[0070] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A CAE analysis method for die-casting machine templates, characterized in that, It includes the following steps: Step A: Create 3D models of the head plate, middle plate, and tail plate respectively; Step B: Standardize and simplify each 3D model, compress unaffected geometric features, and adjust the size of the corresponding features according to standard parameters; The 3D model of the head plate is standardized and simplified. The specific operation steps include: Step b11: retain the moving surface at the mold surface; Step b12: set the diameter of the gatepost hole to be 1mm larger than the gatepost on one side; Step b13: compress the stamped features at the bottom of the head plate and delete the variable cross-section protruding part on the gatepost nut; Step b14: change the internal thread feature of the gatepost nut to an internal hole with the same diameter as the gatepost. The 3D model of the middle plate is standardized and simplified. The specific operation steps include: Step b21: retain the moving surface at the mold surface; Step b22: merge the copper sleeve of the gob hole with the middle plate, and adjust the diameter of the gob hole to be equal to the diameter of the gob; Step b23: compress the steel stamp feature at the bottom of the middle plate; Step b24: retain the actual machining dimensions of the end face of the hinge hole; Step b25: merge the steel sleeve in the long hinge connection hole with the long hinge, and adjust the inner diameter to be equal to the diameter of the large hinge edge; Step b26: adjust the mold size, wherein the outer dimension is adjusted to 80% of the inner distance of the gob hole, and the thickness is adjusted to the average of the maximum mold opening size and the minimum mold opening size; The 3D model of the tailplate is standardized and simplified. The specific operation steps include: Step b31: Compress the threaded hole and the stamped features at the bottom of the tailplate, and delete the protruding part of the variable cross section on the tie rod nut; Step b32: Set the diameter of the tie rod hole to be 1mm larger than the tie rod on one side; Step b33: Change the internal thread feature of the adjusting nut to an inner hole with the same diameter as the tie rod; Step b34: Retain the actual machining dimensions of the end face and inner hole of the hinge hole. Step C: Assemble the simplified model, add relevant mating parts, build the assembly models of the head plate, middle plate and tail plate, and export the corresponding model files after interference checks are completed and the errors are correct. Step D: Import the exported model files into the CAE analysis software and set the corresponding material parameters, contact types, and boundary conditions; Step E: Perform static analysis using CAE analysis software and extract stress and deformation results.

2. The CAE analysis method for die-casting machine templates as described in claim 1, characterized in that, In step C, the head plate and middle plate are assembled according to the angle between the long hinge and the horizontal plane when the mold is actually locked in place, and the mold is fitted to the center position of the head plate and middle plate; the tail plate is assembled according to the angle between the hook hinge and the horizontal plane when the mold is actually locked in place.

3. The CAE analysis method for die-casting machine templates as described in claim 2, characterized in that, In step C, the parts in the assembly model of the head plate and middle plate include the head plate, middle plate, mold, gatepost, gatepost nut, large hinge, and long hinge; the parts in the assembly model of the tail plate include the tail plate, gatepost, adjusting nut, hinge, hook hinge, and side hinge; the material parameters in step D are set as follows: the material of the gatepost and adjusting nut is 42CrMo; the material of the head plate, middle plate, tail plate, mold, long hinge, side hinge, and hook hinge is QT500-7; the material of the gatepost nut is 45 steel; and the material of the hinge and large hinge is 38CrMoAl.

4. The CAE analysis method for die-casting machine templates as described in claim 1, characterized in that, In step D, import each model file into the statics module, draw the hinge edge connecting the long hinge and the hook hinge, as well as the hinge edge connecting the hook hinge and the side hinge and the long hinge in SPACECLAIM, divide the part surface through SPACECLAIM, and convert the angle during mold clamping into the percentage occupied by the dividing line to determine the single surface under stress; at the same time, divide the mold surface of the head plate and the middle plate into internal surfaces along the center of the gatepost.

5. The CAE analysis method for die-casting machine templates as described in claim 3, characterized in that, The contact types in step D include bonded contact and non-separating contact. The assembly models of the head plate and the middle plate have a total of 21 contact pairs, and the assembly models of the tail plate have a total of 24 contact pairs. The contact type between the molds is non-separating contact, the contact type between the gatepost and the gatepost hole of the middle plate is non-separating contact, and the contact type between the remaining parts is bonded contact.

6. The CAE analysis method for die-casting machine templates as described in claim 4, characterized in that, In step D, the boundary conditions are set to fix the far end face of the tie rod, and the nominal clamping force is evenly distributed and applied to the divided hinge semicircular surfaces respectively, with the direction of action pointing to one side of the mold along the edge of the long hinge.

7. The CAE analysis method for die-casting machine templates as described in claim 4, characterized in that, In step E, after completing the static analysis, the equivalent stress cloud diagram of a single part is extracted, and the directional deformation of the middle plate and tail plate is extracted to observe the expansion of the hinge lugs; the deformation of the head plate and middle plate mold surfaces is reflected by extracting the difference in deformation of the internal surfaces to reflect the actual displacement.

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