High-rigidity anti-deformation design system for die frame of automobile component die-casting die

Abstract

The present application relates to the technical field of anti-deformation design. The present application relates to a high-rigidity anti-deformation design system for a die casting die frame of an automobile part. The system comprises a working condition acquisition module, a load partition module, a skeleton generation module, a compensation setting module and a design output module. The working condition acquisition module is used to acquire cavity projection data, gate layout data, core-pulling mechanism layout data, cooling circuit layout data, die frame initial structure data, and locking parameters, injection parameters and mold temperature parameters, and to establish die frame basic working condition data. The working condition acquisition module is used to completely collect cavity projection, gate layout, core-pulling mechanism, cooling circuit, die frame initial structure and full-dimension parameters of die casting process, to construct a unified die frame basic working condition data system, to realize standardization and full-scale of design data source, to solve the problem of scattered design parameters and incomplete working condition coverage in the prior art, to provide a reliable data basis for die frame accurate design, and to improve the consistency and traceability of design benchmarks.

Description

Technical Field

[0001] This invention relates to the field of anti-deformation design technology, and more specifically, to a high-rigidity anti-deformation design system for die-casting mold bases of automotive parts. Background Technology

[0002] Die-casting molds for automotive parts are the core process equipment for achieving efficient molding of lightweight automotive structural components. As the core load-bearing and assembly base of the die-casting mold, the structural rigidity and deformation resistance of the mold frame directly determine the dimensional accuracy, molding quality, and overall service life of the die-cast parts.

[0003] Existing die-casting mold sets are mainly used in high-pressure, high-tonnage, and high-mold-temperature die-casting production scenarios for large automotive structural parts, especially for complex parts such as automotive chassis parts and body structural parts. The mold set needs to withstand the coupled effects of clamping force, injection off-center load, and cyclic thermal deformation for a long time. At the same time, it is compatible with the integrated layout of multiple gates, side core pulling, and complex cooling circuits to complete the molding operation under continuous high-cycle die-casting conditions.

[0004] In large and complex die-casting scenarios, existing mold base designs have significant flaws. The overall rigidity of the mold base is insufficient, failing to effectively balance normal clamping loads, offset tangential torsional deformation, and suppress non-uniform thermal expansion deformation. This easily leads to problems such as parting surface gaps, excessive template deflection, and localized structural collapse, directly reducing the dimensional accuracy and molding consistency of automotive die-cast parts, and increasing product defect and mold failure rates. Existing improvement methods only enhance rigidity through single means such as thickening the template and adding simple reinforcing ribs, failing to achieve precise load-zone reinforcement and deformation pre-compensation through coordinated design. This results in issues such as insufficient local reinforcement, low material utilization, and limited deformation resistance. To mitigate these problems, a high-rigidity, deformation-resistant mold base design system for automotive component die-casting is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a high-rigidity, deformation-resistant design system for die-casting mold bases for automotive parts, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, a high-rigidity, deformation-resistant design system for die-casting mold bases for automotive components is provided, including a working condition acquisition module, a load partitioning module, a skeleton generation module, a compensation setting module, and a design output module. The working condition acquisition module is used to acquire cavity projection data, gate layout data, core pulling mechanism layout data, cooling circuit layout data, initial mold frame structure data, as well as mold clamping parameters, injection parameters and mold temperature parameters, and establish basic working condition data of the mold frame; The load partitioning module is used to calculate the normal locking load, tangential eccentric load and thermal expansion load based on the working condition data of the mold base, and to divide the main bearing area, torsion sensitive area and thermal deformation sensitive area to generate mold base partition load data. The skeleton generation module is used to arrange the closed-loop bearing frame, main support beam, secondary support beam and local pressure-bearing support island according to the formwork partition load data, and generate formwork skeleton data; The compensation setting module is used to set the parting surface pre-compensation amount and template pre-compensation amount according to the mold frame skeleton data and thermal expansion load, and generate mold frame compensation data; The design output module is used to output structural parameters and compensation parameters based on the mold frame skeleton data and mold frame compensation data.

[0007] As a further improvement to this technical solution, in the working condition acquisition module, the cavity projection data includes the cavity projection outline, the cavity projection area, and the cavity projection center; The gate layout data includes the location of the main gate and the location of the overflow channel; The layout data for the core-pulling mechanism includes the side core-pulling position and core-pulling direction; Cooling circuit layout data includes the location and direction of cooling circuit flow; The initial structural data of the mold frame includes the thickness of the fixed mold base plate, the thickness of the fixed template plate, the thickness of the moving template plate, the thickness of the moving mold base plate, and the distribution of connecting parts.

[0008] As a further improvement to this technical solution, in the load partitioning module, the normal clamping load is calculated based on the cavity projection area and clamping parameters, the tangential off-center load is calculated based on the eccentric distance between the main gate position, the overflow groove position and the cavity projection center, and the thermal expansion load is calculated based on the cooling circuit position, the cooling circuit flow direction and the mold temperature parameters. The continuous region where the normal clamping load is higher than the first threshold is defined as the main load-bearing region, the torque transmission region corresponding to the tangential off-center load is defined as the torsion sensitive region, and the continuous region where the thermal expansion load gradient is higher than the second threshold is defined as the thermal deformation sensitive region.

[0009] As a further improvement to this technical solution, in the skeleton generation module, a closed-loop bearing frame is arranged along the outer periphery boundary corresponding to the cavity projection data, a main support beam is arranged according to the load transmission direction of the main bearing area, and secondary support beams are arranged crosswise between adjacent main support beams according to the torque transmission direction of the torsion sensitive area.

[0010] As a further improvement to this technical solution, in the skeleton generation module, local pressure-bearing support islands are arranged according to the overlapping area of ​​the torsion sensitive area and the thermal deformation sensitive area, the area corresponding to the side core pulling position, and the area corresponding to the main gate position. The larger the overlapping area, the higher the density of the local pressure-bearing support islands; The height of the local pressure-bearing support islands in the areas corresponding to the side core pulling position and the main gate position is higher than the height of the local pressure-bearing support islands in other areas.

[0011] As a further improvement to this technical solution, the compensation setting module reads the node displacement direction and node displacement amount of the mold frame skeleton data under the action of thermal expansion load, extracts the displacement amount of the corresponding node set of the parting surface to form the deformation trend of the parting surface, and extracts the displacement amount of the corresponding node set of the template to form the deflection trend of the template. The offset amount opposite to the deformation trend of the parting surface is determined as the pre-compensation amount of the parting surface, and the offset amount opposite to the deflection trend of the template is determined as the pre-compensation amount of the template. The pre-compensation amount of the parting surface and the pre-compensation amount of the template are then linked to the mold frame data to form the mold frame compensation data.

[0012] As a further improvement to this technical solution, the design output module outputs the thickness of the fixed mold base plate, the thickness of the fixed template, the thickness of the moving template, the thickness of the moving mold base plate, the width of the closed-loop bearing frame, the height of the main support beam, the spacing of the secondary support beam, and the coordinates of the arrangement of the local pressure-bearing support islands based on the mold frame skeleton data, thus forming a mold frame structure parameter table.

[0013] As a further improvement to this technical solution, the design output module outputs the pre-compensation amount of the parting surface and the pre-compensation amount of the template based on the mold frame compensation data to form a compensation parameter table; and associates the mold frame structure parameter table with the compensation parameter table to form the mold frame design output result.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this high-rigidity, deformation-resistant design system for automotive component die-casting mold bases, the working condition acquisition module comprehensively collects parameters from all dimensions, including cavity projection, gate layout, core-pulling mechanism, cooling circuit, initial mold base structure, and die-casting process. This constructs a unified basic working condition data system for the mold base, achieving standardization and comprehensiveness of the design data source. It solves the problems of scattered design parameters and incomplete working condition coverage in existing technologies, providing a reliable data foundation for precise mold base design and improving the consistency and traceability of design benchmarks.

[0015] 2. In this high-rigidity, deformation-resistant design system for automotive component die-casting mold frames, the load zoning module completes the quantitative calculation of three types of core loads and the precise division of three sensitive areas. Combined with the skeleton generation module, a closed-loop load-bearing frame, main support beams, cross secondary support beams, and differentiated local pressure-bearing support islands are arranged to form a multi-level rigid skeleton structure of "overall constraint + main load-bearing + torsional resistance + local reinforcement". This structure can specifically suppress torsional deformation and thermal deformation of the mold frame, significantly improve the overall rigidity and local pressure-bearing capacity of the mold frame, and effectively avoid deformation problems such as parting surface misalignment and template deflection.

[0016] 3. In this high-rigidity, deformation-resistant design system for automotive die-casting mold bases, the compensation setting module achieves reverse pre-compensation of the parting surface and template based on the node displacement under thermal load. This combines structural rigidity enhancement with active deformation compensation, upgrading from passive deformation resistance to active deformation control. Simultaneously, the design output module generates standardized structural parameters and compensation parameters for correlated output, which not only improves the molding accuracy and product consistency of automotive die-casting parts, but also optimizes the material usage of the mold base structure, enhances mold life and production stability, and adapts to the precision and high-efficiency production needs of large and complex automotive die-casting parts. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a high-rigidity, deformation-resistant die-casting mold holder for automotive parts according to the present invention; Figure 2 This is a flowchart illustrating the working condition acquisition module of the present invention; Figure 3 This is a flowchart illustrating the load partitioning module of the present invention; Figure 4 This is a flowchart illustrating the skeleton generation module of the present invention; Figure 5 This is a flowchart illustrating the compensation setting module of the present invention; Figure 6 This is a flowchart illustrating the design of the output module of this invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-6 As shown, the purpose of this embodiment is to provide a high-rigidity, deformation-resistant design system for die-casting mold bases of automotive parts, including a working condition acquisition module, a load partitioning module, a skeleton generation module, a compensation setting module, and a design output module; The working condition acquisition module is used to acquire cavity projection data, gate layout data, core pulling mechanism layout data, cooling circuit layout data, initial mold frame structure data, as well as mold clamping parameters, injection parameters and mold temperature parameters, and establish basic working condition data of the mold frame; In the working condition acquisition module, the cavity projection data includes the cavity projection outline, cavity projection area, and cavity projection center; First, the projection contour of the cavity on the parting surface of the mold frame is extracted from the three-dimensional digital model of the die-casting mold of the automotive parts. This contour is the closed geometric contour of the cavity structure on the plane where the parting surface is located. Based on the extracted projection contour, the projection area of ​​the cavity is calculated by plane geometric integration. Then, the coordinates of the projection center of the cavity are solved by combining the geometric features of the projection contour. Finally, complete cavity projection data including the cavity projection contour, cavity projection area, and cavity projection center are obtained. The gate layout data includes the location of the main gate and the location of the overflow groove; In the design model of the mold gating system, the installation position of the main gate on the mold parting surface and the template is located, and the layout points of the overflow groove are identified, including the center coordinates and distribution range of the overflow groove. The main gate position and the overflow groove position are integrated to form the gate layout data, which provides a position reference for subsequent off-center load calculation. The layout data of the core-pulling mechanism includes the side core-pulling position and the core-pulling direction; For the mold side core pulling structure, the assembly position coordinates of the side core pulling mechanism on the moving or fixed template are collected, and the movement direction of the core pulling mechanism is determined. This direction is the linear movement guide direction of the core pulling component relative to the mold frame body. The side core pulling position and core pulling direction parameters are integrated to generate core pulling mechanism layout data, which is used to mark the local stress and structural weakening areas of the mold frame. The cooling circuit layout data includes the location and flow direction of the cooling circuits; From the mold cooling system design scheme, the layout position of the cooling circuit inside the fixed mold plate and the moving mold plate is extracted, the center coordinates and direction of the cooling circuit are determined, and the flow direction of the cooling medium inside the cooling circuit is determined. The location and flow direction of the cooling circuit are summarized to form the cooling circuit layout data, which serves as the basis for subsequent thermal expansion load calculation. The initial structural data of the mold frame includes the thickness of the fixed mold base plate, the thickness of the fixed template plate, the thickness of the moving template plate, the thickness of the moving mold base plate, and the distribution of connecting parts.

[0020] The thickness parameters of each core plate of the mold frame are read sequentially, including the thickness of the fixed mold base plate, the thickness of the fixed template plate, the thickness of the moving template plate, and the thickness of the moving mold base plate. At the same time, the distribution information of the connecting parts in the mold frame is statistically analyzed. The connecting parts include the installation position and arrangement of structures such as bolts, guide pillars, and guide sleeves. The above plate thickness and connecting part distribution data are integrated to construct the initial structure data of the mold frame. The load partitioning module is used to calculate the normal locking load, tangential eccentric load and thermal expansion load based on the working condition data of the mold base, and to divide the main load-bearing area, torsion sensitive area and thermal deformation sensitive area to generate mold base partition load data. In the load partitioning module, the normal clamping load is calculated based on the cavity projection area and the clamping parameters; the tangential off-center load is calculated based on the eccentric distance between the main gate position, the overflow groove position and the cavity projection center; and the thermal expansion load is calculated based on the cooling circuit position, the cooling circuit flow direction and the mold temperature parameters. Using the cavity projection area and clamping parameters as the calculation basis, the cavity projection area value output by the working condition acquisition module and the clamping parameters of the die casting equipment are retrieved first. These clamping parameters include the working clamping force and the unit area bearing pressure coefficient. The two types of parameters are substituted into the corresponding calculation model to complete the solution of the normal clamping load of the mold frame under the mold closing and injection working conditions. The distribution data of the normal clamping load in the entire range of the mold frame is obtained. This load is a positive bearing load perpendicular to the parting surface direction, which directly reflects the core force of the mold frame. Based on the relative positions of the main gate, overflow groove, and cavity projection center, the coordinates of the main gate, overflow groove, and cavity projection center are extracted. The planar eccentricity distance between each key point and the cavity projection center is calculated. Combined with the injection pressure value in the injection parameters, the tangential eccentric load and corresponding eccentric torque generated by the eccentric arrangement are solved to obtain the tangential eccentric load distribution data of the entire mold frame. This load is a shear and torsional load parallel to the parting surface direction, which is the main cause of torsional deformation of the mold frame. Thermal expansion load calculations are performed based on the cooling circuit layout and mold temperature parameters. First, the temperature field distribution areas of the mold frame are divided according to the location and flow direction of the cooling circuits. Then, combining the mold working temperature and the inlet and outlet temperatures of the cooling medium in the mold temperature parameters, the temperature difference and thermal strain values ​​of different areas of the mold frame are calculated. Finally, combining the thermophysical properties of the mold frame material, the thermal expansion load caused by uneven temperature in each area is calculated, obtaining the thermal expansion load distribution data for the entire mold frame. This load is the core source of thermal warping and non-uniform deformation of the mold frame. The formula is as follows: ; in, For normal mode-locking load, This refers to the clamping pressure per unit area corresponding to the clamping parameters. The projected area of ​​the cavity; ; in, This represents the eccentric torque corresponding to the tangential eccentric load. For the tangential force of the compression injection, The eccentricity distance between the main gate and the overflow groove relative to the center of the cavity projection; ; in, For thermal expansion load, The elastic modulus of the mold frame material. The coefficient of thermal expansion of the mold base material. Temperature difference in the mold frame area; ; in, For thermal expansion load gradient, , These are the partial derivatives of the thermal expansion load in the x and y directions; The continuous region where the normal clamping load is higher than the first threshold is defined as the main load-bearing region, the torque transmission region corresponding to the tangential off-center load is defined as the torsion sensitive region, and the continuous region where the thermal expansion load gradient is higher than the second threshold is defined as the thermal deformation sensitive region.

[0021] The calculated global normal clamping load is compared with the preset first threshold region by region. Continuous planar regions with normal clamping load values ​​higher than the first threshold are selected. These regions are the areas where the mold frame bears the main clamping and injection positive loads. They are marked as the main load-bearing areas, which are the core areas for strengthening the rigidity of the mold frame structure. Based on the eccentric torque transmission path corresponding to the tangential eccentric load, the transmission range and action area of ​​the torque inside the mold frame template are determined. This area is where the eccentric torque is prone to cause torsional deformation of the mold frame. This torque transmission action area is uniformly marked as the torsion sensitive area. The torsion sensitive area is the key area for the anti-torsion structure arrangement of the mold frame. First, perform gradient calculation on the global thermal expansion load to obtain the thermal expansion load gradient values ​​of each region of the mold frame. Then, compare these gradient values ​​with a preset second threshold region by region to screen out continuous regions where the thermal expansion load gradient is higher than the second threshold. These regions have significant uneven thermal deformation and are prone to parting surface misalignment and template warping. These regions are marked as thermal deformation sensitive areas, which are the key areas for local reinforcement and deformation compensation.

[0022] The skeleton generation module is used to arrange the closed-loop bearing frame, main support beam, secondary support beam and local pressure-bearing support island according to the formwork partition load data, and generate formwork skeleton data; In the skeleton generation module, the closed-loop bearing frame is arranged along the outer periphery boundary corresponding to the cavity projection data, the main support beam is arranged according to the load transmission direction of the main bearing area, and the secondary support beam is arranged crosswise between adjacent main support beams according to the torque transmission direction of the torsion sensitive area.

[0023] Using the outer perimeter boundary corresponding to the cavity projection data as the layout reference, a closed-loop bearing frame is continuously laid out along the outer perimeter boundary, so that the closed-loop bearing frame forms a complete closed ring structure that fits the cavity projection contour, and the center of the frame is coaxially aligned with the cavity projection center. The closed-loop bearing frame penetrates the fixed template and the moving template along the normal of the mold frame parting surface, and constrains the overall circumferential deformation of the mold frame through the ring closed structure, preventing the load in the cavity area from spreading outward, and providing basic constraints for the overall rigidity of the mold frame; Retrieve the main load-bearing area distribution information and normal clamping load transfer direction from the formwork zoning load data, and arrange the main support beams along the main load transfer path. One end of the main support beam is rigidly connected to the closed-loop load-bearing frame, and the other end extends to the load-bearing reference plane of the formwork base plate. The beam arrangement direction is completely consistent with the vertical transfer direction of the normal clamping load. The cross-sectional dimensions of the main support beam are synchronously adapted to the load amplitude of the main load-bearing area to ensure that the positive load can be efficiently and without attenuation transferred to the formwork base, avoiding local deflection deformation in the main load-bearing area. Based on the torque transmission direction of the torsion-sensitive zone, secondary support beams are arranged in a cross pattern between adjacent main support beams. The included angle of the cross beams matches the direction of torque application, and the cross nodes are located in the core stress section of the main support beams. The cross-arranged secondary support beams and the main support beams form a truss-like anti-torsion structure, which can effectively offset the torsional stress generated by tangential eccentric loads and improve the overall torsional stiffness of the torsion-sensitive zone. The spacing of the secondary support beams is adaptively adjusted according to the magnitude of the torque in the torsion-sensitive zone. In the skeleton generation module, the local pressure-bearing support island is arranged according to the overlapping area of ​​the torsion sensitive area and the thermal deformation sensitive area, the area corresponding to the side core pulling position, and the area corresponding to the main gate position. By matching spatial coordinates, the overlapping area of ​​the torsion sensitive area and the thermal deformation sensitive area is identified. At the same time, the area corresponding to the side core pulling position and the area corresponding to the main gate position are located. The above three types of areas are defined as the core layout range of the local pressure-bearing support island. Meanwhile, non-load-bearing interference areas such as cooling circuits and core pulling movement gaps are avoided, and the precise layout coordinate range of the support island is determined. The larger the overlapping area, the higher the arrangement density of the local pressure-bearing support islands; The density of local bearing support islands is determined based on the area of ​​the overlapping region between the torsional sensitive zone and the thermal deformation sensitive zone. The larger the overlapping area, the more support islands are deployed per unit area, and the density is positively correlated with the area of ​​the overlapping region. A high-density deployment pattern is adopted in the core section of the overlapping region, and the deployment density is gradually reduced towards the edge of the overlapping region to ensure the local bearing capacity and deformation resistance of the deformation coupling region.

[0024] The height of the local pressure-bearing support island in the area corresponding to the side core pulling position and the area corresponding to the main gate position is higher than the height of the local pressure-bearing support island in the other areas.

[0025] Differentiated height parameters are set for the local pressure-bearing support islands in different layout areas. The areas corresponding to the side core pulling position and the main gate position are local high pressure impact and lateral force concentration areas. The support island height in these areas is set to the upper value of the standard height. The support islands in other non-key areas adopt the reference height. The structural stiffness of local high load areas is enhanced through height differentiation design. The contour dimensions of the closed-loop bearing frame, the arrangement direction and cross-sectional parameters of the main support beams, the intersection angle and spacing parameters of the secondary support beams, and the layout coordinates, density and height parameters of the local pressure-bearing support islands are integrated. All parameters are normalized to finally generate complete formwork skeleton data. The compensation setting module is used to set the parting surface pre-compensation amount and the template pre-compensation amount according to the mold frame data and the thermal expansion load, and generate mold frame compensation data. In the compensation setting module, the node displacement direction and node displacement amount of the mold frame skeleton under the action of thermal expansion load are read, the displacement amount of the parting surface corresponding to the node set is extracted to form the parting surface deformation trend, and the displacement amount of the template corresponding to the node set is extracted to form the template deflection trend. The formwork skeleton data is imported into the structural mechanics analysis model, and the previously calculated thermal expansion load is loaded as the external excitation load to perform a global nodal mechanical simulation calculation on the formwork skeleton. All discrete calculation nodes of the formwork skeleton are traversed, and the displacement direction vector and displacement amplitude of each node under the continuous action of the thermal expansion load are read one by one to form a complete nodal displacement dataset of the formwork skeleton. This dataset contains the spatial coordinates, displacement direction, and displacement value of all nodes.

[0026] From the global node displacement dataset, all nodes on the plane containing the parting surface are located and extracted using spatial coordinate filtering rules, forming a parting surface node set. The displacements of all nodes in the parting surface node set are weighted and integrated, and abnormal discrete displacement data are removed. According to the arrangement order of the nodes on the parting surface, a continuous parting surface deformation curve is fitted. This curve represents the parting surface deformation trend and intuitively reflects the warping and opening deformation law of the parting surface under thermal expansion load.

[0027] From the global node displacement dataset, structural nodes corresponding to the fixed template and the moving template are extracted to form a template node set. The node displacements within the template node set are averaged regionally. Combined with the template's support boundary conditions, the bending deformation surface of the template under thermal expansion load is fitted. This surface represents the template's deflection trend, clearly showing the deflection, subsidence, and bulging deformation characteristics of the template's center, edges, and load-bearing parts.

[0028] The offset amount opposite to the deformation trend of the parting surface is determined as the pre-compensation amount of the parting surface, and the offset amount opposite to the deflection trend of the template is determined as the pre-compensation amount of the template.

[0029] Based on the displacement direction and amount according to the deformation trend of the parting surface, a reverse compensation principle is adopted. An offset direction completely opposite to the deformation trend of the parting surface is set, and the displacement amplitude corresponding to this reverse offset is determined as the pre-compensation amount of the parting surface. The magnitude of the compensation amount matches the maximum displacement of the parting surface node to ensure that the parting surface can recover to the ideal fit state under the action of thermal expansion load after compensation.

[0030] Based on the bending direction and deflection amount of the template's deflection trend, following the reverse pre-compensation logic, an offset direction opposite to the template's deflection trend is selected, and the deflection amplitude corresponding to this reverse offset is determined as the template's pre-compensation amount. The pre-compensation amount for different areas of the template is set differently according to the deflection amount of the corresponding nodes to ensure that the deflection deviation caused by thermal deformation is eliminated after template compensation.

[0031] The design output module is used to output structural parameters and compensation parameters based on the mold frame skeleton data and the mold frame compensation data.

[0032] In the design output module, based on the mold frame skeleton data, the thickness of the fixed mold base plate, the thickness of the fixed template, the thickness of the moving template, the thickness of the moving mold base plate, the width of the closed-loop bearing frame, the height of the main support beam, the spacing of the secondary support beam, and the coordinates of the arrangement of the local pressure-bearing support islands are output to form a mold frame structure parameter table.

[0033] Key dimensions and positional parameters are extracted one by one from the formwork skeleton data according to structural category. First, the relevant parameters of the initial plate of the formwork are retrieved, including the thickness of the fixed mold base plate, the thickness of the fixed template, the thickness of the moving template, and the thickness of the moving mold base plate. Then, the skeleton reinforcement structural parameters are extracted, including the width of the closed-loop bearing frame, the height of the main support beam, and the spacing of the secondary support beam. Finally, the planar layout coordinates of the local pressure-bearing support islands are obtained through coordinate analysis, completing the complete extraction of all structural parameters and ensuring that the parameters completely correspond to the actual structural dimensions and layout positions of the formwork skeleton.

[0034] The extracted parameters, such as the thickness of the fixed mold base plate, the thickness of the fixed template, the thickness of the moving template, the thickness of the moving mold base plate, the width of the closed-loop bearing frame, the height of the main support beam, the spacing of the secondary support beam, and the coordinates of the local bearing support island, are classified and organized according to the structure name, parameter value, unit, and dimension of the corresponding layout area. Duplicate parameters and abnormal values ​​are removed, and the parameter format and measurement standard are unified to form a standardized mold frame structure parameter table. This parameter table can be directly used for mold frame structure processing and 3D modeling.

[0035] In the design output module, the parting surface pre-compensation amount and template pre-compensation amount are output based on the mold frame compensation data to form a compensation parameter table; and the mold frame structure parameter table is associated with the compensation parameter table to form the mold frame design output result.

[0036] The compensation-related parameters of the parting surface and template are separated from the mold frame compensation data. The pre-compensation amount of the parting surface corresponding to each node of the parting surface is read, including the compensation direction and compensation amplitude. At the same time, the template pre-compensation amount of the corresponding area of ​​the fixed template and the moving template is extracted. The differentiated compensation values ​​of different positions of the template are distinguished. The accurate extraction of all compensation parameters is completed, ensuring that the compensation parameters are bound to the corresponding structural parts of the mold frame skeleton.

[0037] The extracted parting surface pre-compensation amount and template pre-compensation amount are systematically organized according to the dimensions of compensation location, compensation direction, compensation value, and applicable working conditions. The measurement accuracy and labeling specifications of the compensation amount are standardized, invalid compensation data is eliminated, and a standardized compensation parameter table is formed. This parameter table can be directly used for pre-compensation offset and mold closing accuracy adjustment in mold processing.

[0038] Using the spatial coordinates of the mold frame structure as the reference, the structural items in the mold frame structure parameter table are matched and bound with the corresponding compensation items in the compensation parameter table to establish a one-to-one mapping relationship between structural parameters and compensation parameters. This ensures that each mold frame structure can correspond to a unique pre-compensation value and avoids parameter association confusion.

[0039] The integrated mold frame structure parameter table and compensation parameter table are combined, and auxiliary information such as parameter notes and applicable die casting conditions are added to form a complete mold frame design output. This output has both structural design parameters and deformation compensation parameters, and can be directly delivered to the production and mold assembly stages.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-rigidity, deformation-resistant design system for die-casting mold holders of automotive parts, characterized in that: It includes a load condition acquisition module, a load zoning module, a skeleton generation module, a compensation setting module, and a design output module; The working condition acquisition module is used to acquire cavity projection data, gate layout data, core pulling mechanism layout data, cooling circuit layout data, initial mold frame structure data, as well as mold clamping parameters, injection parameters and mold temperature parameters, and establish basic working condition data of the mold frame; The load partitioning module is used to calculate the normal locking load, tangential eccentric load and thermal expansion load based on the working condition data of the mold base, and to divide the main bearing area, torsion sensitive area and thermal deformation sensitive area to generate mold base partition load data. The skeleton generation module is used to arrange the closed-loop bearing frame, main support beam, secondary support beam and local pressure-bearing support island according to the formwork partition load data, and generate formwork skeleton data; The compensation setting module is used to set the parting surface pre-compensation amount and template pre-compensation amount according to the mold frame skeleton data and thermal expansion load, and generate mold frame compensation data; The design output module is used to output structural parameters and compensation parameters based on the mold frame skeleton data and mold frame compensation data.

2. The high-rigidity, deformation-resistant design system for automotive component die-casting mold base according to claim 1, characterized in that: In the working condition acquisition module, the cavity projection data includes the cavity projection outline, cavity projection area, and cavity projection center; The gate layout data includes the location of the main gate and the location of the overflow channel; The layout data for the core-pulling mechanism includes the side core-pulling position and core-pulling direction; Cooling circuit layout data includes the location and direction of cooling circuit flow; The initial structural data of the mold frame includes the thickness of the fixed mold base plate, the thickness of the fixed template plate, the thickness of the moving template plate, the thickness of the moving mold base plate, and the distribution of connecting parts.

3. The high-rigidity, deformation-resistant design system for automotive component die-casting mold base according to claim 2, characterized in that: In the load partitioning module, the normal clamping load is calculated based on the cavity projection area and clamping parameters, the tangential off-center load is calculated based on the eccentric distance between the main gate position, the overflow groove position and the cavity projection center, and the thermal expansion load is calculated based on the cooling circuit position, cooling circuit flow direction and mold temperature parameters. The continuous region where the normal clamping load is higher than the first threshold is defined as the main load-bearing region, the torque transmission region corresponding to the tangential off-center load is defined as the torsion sensitive region, and the continuous region where the thermal expansion load gradient is higher than the second threshold is defined as the thermal deformation sensitive region.

4. The high-rigidity, deformation-resistant design system for automotive component die-casting mold base according to claim 1, characterized in that: In the skeleton generation module, a closed-loop bearing frame is arranged along the outer periphery boundary corresponding to the cavity projection data, a main support beam is arranged according to the load transmission direction of the main bearing area, and a secondary support beam is arranged crosswise between adjacent main support beams according to the torque transmission direction of the torsion sensitive area.

5. The high-rigidity, deformation-resistant design system for automotive component die-casting mold base according to claim 1, characterized in that: In the skeleton generation module, local pressure-bearing support islands are arranged according to the overlapping area of ​​the torsion sensitive area and the thermal deformation sensitive area, the area corresponding to the side core pulling position, and the area corresponding to the main gate position. The larger the overlapping area, the higher the density of the local pressure-bearing support islands; The height of the local pressure-bearing support islands in the areas corresponding to the side core pulling position and the main gate position is higher than the height of the local pressure-bearing support islands in other areas.

6. The high-rigidity, deformation-resistant design system for automotive component die-casting mold base according to claim 1, characterized in that: In the compensation setting module, the direction and amount of node displacement of the mold frame skeleton under thermal expansion load are read, the displacement of the corresponding node set of the parting surface is extracted to form the deformation trend of the parting surface, and the displacement of the corresponding node set of the template is extracted to form the deflection trend of the template. The offset amount opposite to the deformation trend of the parting surface is determined as the pre-compensation amount of the parting surface, and the offset amount opposite to the deflection trend of the template is determined as the pre-compensation amount of the template. The pre-compensation amount of the parting surface and the pre-compensation amount of the template are then linked to the mold frame data to form the mold frame compensation data.

7. The high-rigidity, deformation-resistant design system for automotive component die-casting mold base according to claim 1, characterized in that: The design output module outputs the thickness of the fixed mold base plate, the thickness of the fixed template, the thickness of the moving template, the thickness of the moving mold base plate, the width of the closed-loop bearing frame, the height of the main support beam, the spacing of the secondary support beam, and the coordinates of the arrangement of the local pressure-bearing support islands based on the mold frame skeleton data, forming a mold frame structure parameter table.

8. The high-rigidity, deformation-resistant design system for automotive component die-casting mold base according to claim 1, characterized in that: In the design output module, the pre-compensation amount of the parting surface and the pre-compensation amount of the template are output based on the mold frame compensation data to form a compensation parameter table; and the mold frame structure parameter table is associated with the compensation parameter table to form the mold frame design output result.

Images