A die design system and method applicable to stamping of steel and aluminum

Abstract

The present invention discloses a die design system applicable to the stamping of steel and aluminum, including a process surface generation module, a model construction module, a simulation stamping module, a simulation stamping optimization module, and a die forming module; the process surface generation module is used to generate a blank process surface; the model construction module is used to construct an upper female die model, a blank holder model, and a lower male die model; the simulation stamping module is used to perform simulation stamping on an aluminum blank to determine the product surfaces of the upper female die model, the blank holder model, and the lower male die model; the simulation stamping optimization module is used to perform simulation stamping on a steel blank to optimize the upper female die model and the blank holder model; the die forming module is used to generate the upper female die, the blank holder, and the lower male die. When designing the die, the present invention fully considers the stamping difficulties of aluminum plates and steel plates, and based on the die and its main surface obtained from the forming analysis of the aluminum blank, a stamping die for steel blanks with a shared main surface is obtained, shortening and reducing the die design cycle.

Description

Technical Field

[0001] The invention relates to the technical field of automobile cover stamping dies, and in particular to a die design system and method suitable for steel and aluminum stamping forming. Background Art

[0002] Lightweight technology is an important measure for automobile energy conservation and emission reduction. The weight of the body in white accounts for about 20%-30% of the weight of the whole vehicle. The lightweight of the body is the key to the lightweight of the whole vehicle. An important way to lightweight the body is to use low-density materials to replace steel plates. Aluminum plates have obvious advantages due to their light weight, high strength and excellent corrosion resistance. More and more models, especially new energy vehicles, use aluminum alloy materials for body parts processing and forming. Automobile body parts are mainly stamped by stamping dies, but there is a big difference between aluminum alloy materials and steel in terms of stamping forming performance. The molds generally used for steel stamping cannot be directly used for the processing of aluminum alloy materials. Therefore, even for the same body part, if the materials are different, the molds are also different. It is necessary to develop two sets of molds for the processing of different materials. The mold development cycle is long and the cost investment is large. Therefore, how to develop a process that can take into account the stamping forming of steel and aluminum materials and design a stamping mold that can meet the forming of steel and aluminum materials at the same time is a problem that needs to be solved urgently. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and to provide a mold design system and method suitable for steel and aluminum stamping forming, which does not require redevelopment of the mold when the body material of the same model is changed, and is of great significance for reducing automobile development and manufacturing costs and shortening automobile mold development cycle.

[0004] To achieve this purpose, the die design system suitable for steel and aluminum stamping forming designed by the present invention is characterized in that: it includes a process surface generation module, a model construction module, a simulation stamping forming module, a simulation stamping optimization module and a die forming module;

[0005] The process surface generation module is used to generate a blank process surface;

[0006] The model building module is used to build an upper die model, a blank holder model and a lower punch model according to the blank process surface;

[0007] The simulation stamping forming module is used to simulate stamping of the aluminum blank through the upper die model, the blank holder model and the lower punch model, and determine the process supplementary profile, the material holding surface and the upper die draw rib of the upper die model; the blank holder process surface, the blank holder draw rib and the product surface of the lower punch model of the blank holder model;

[0008] The simulation stamping optimization module is used to perform simulation stamping on the steel blank by determining the upper die model of the process supplementary surface, blank holding surface, and draw beads on the upper die; determining the blank holding die model of the blank holding process surface and draw beads on the blank holder ring, and determining the lower punch model of the product surface, and optimizing the draw beads on the upper die and the draw beads on the blank holder ring;

[0009] The die forming module is used to generate the upper die according to the process supplementary surface, blank holding surface, and draw beads on the upper die before and after optimization; generate the blank holder ring according to the blank holding process surface and the optimized draw beads on the blank holder ring; generate the lower punch according to the product surface and the draw beads on the blank holder ring before and after optimization.

[0010] Further, the model construction module constructs the lower punch model, including constructing the product surface according to the digital model features of the blank process surface and the design standards of the aluminum plate process surface.

[0011] Further, the model construction module constructs the upper die model, including constructing the process supplementary surface according to the surface features of the product surface and the design standards of the aluminum plate process surface.

[0012] Further, the model construction module constructs the upper die model, and also includes constructing the blank holding surface and the draw beads on the upper die according to the surface features of the product surface, the surface features of the process supplementary surface, and the design standards of the aluminum plate process surface.

[0013] Further, the model construction module constructs the blank holder ring model, including constructing the blank holding process surface and the draw beads on the blank holder ring according to the surface features of the blank holding surface, the shape and layout area of the draw beads on the upper die, and the design standards of the aluminum plate process surface.

[0014] Further, the simulation stamping optimization module optimizes the draw beads on the upper die, including generating the draw beads on the upper die on the premise that the process supplementary surface and the product surface remain unchanged, comparing the draw beads on the upper die when the upper die model performs simulation stamping on the aluminum blank and the draw beads on the upper die when the upper die model performs simulation stamping on the steel blank, and retaining the same parts of the two.

[0015] Further, the simulation stamping optimization module optimizes the draw beads on the blank holder ring, including generating the draw beads on the blank holder ring on the premise that the process supplementary surface and the product surface remain unchanged, comparing the draw beads on the blank holder ring when the blank holder ring model performs simulation stamping on the aluminum blank and the draw beads on the blank holder ring when the blank holder ring model performs simulation stamping on the steel blank, and retaining the same parts of the two.

[0016] Further, the die forming module generates the upper die according to the process supplementary surface, the blank holding surface, and the upper die drawing beads before and after optimization, including comparing the upper die drawing beads of the upper die model for simulating stamping of the aluminum blank and the upper die drawing beads of the upper die model for simulating stamping of the steel blank, and generating different upper die inserts for the different parts of the two.

[0017] Furthermore, the die forming module generates the lower punch according to the product surface and the upper die drawing beads before and after optimization, including comparing the blank holder drawing beads of the blank holder model for simulating stamping of the aluminum blank and the blank holder drawing beads of the blank holder model for simulating stamping of the steel blank, and generating different lower punch inserts for the different parts of the two.

[0018] Still further, the die design method of the die design system applicable to steel and aluminum stamping forming described above is as follows: It includes the following steps:

[0019] Step 1: Generate the blank process surface;

[0020] Step 2: According to the blank process surface, construct the upper die model, the blank holder model, and the lower punch model;

[0021] Step 3: Through the upper die model, the blank holder model, and the lower punch model, perform simulation stamping on the aluminum blank to determine the process supplementary surface, the blank holding surface, and the upper die drawing beads of the upper die model; the blank holding process surface, the blank holder drawing beads of the blank holder model, and the product surface of the lower punch model;

[0022] Step 4: Through the upper die model with the determined process supplementary surface, blank holding surface, and upper die drawing beads; the blank holder model with the determined blank holding process surface and blank holder drawing beads, and the lower punch model with the determined product surface, perform simulation stamping on the steel blank to optimize the upper die drawing beads and the blank holder drawing beads;

[0023] Step 5: Generate the upper die according to the process supplementary surface, the blank holding surface, and the upper die drawing beads before and after optimization; generate the blank holder according to the blank holding process surface and the optimized blank holder drawing beads; generate the lower punch according to the product surface and the blank holder drawing beads before and after optimization.

[0024] The beneficial effects of the present invention are as follows: When designing the mold, the present invention fully considers the stamping forming difficulties of aluminum plates and steel plates. Based on the mold and its main surface obtained from the forming analysis of aluminum blanks, a stamping mold for steel blanks with a shared main surface is obtained, which shortens the mold design cycle and reduces the mold design cost. Regarding the differences in draw beads of the stamping mold, an insert structure is adopted to achieve the rapid replacement of the differential parts of the mold, thereby reducing the production and manufacturing cost of the mold. By using the monitoring and acquisition system of an industrial camera, the matching linkage of the mold and the forming parameters of the press can be realized, meeting the requirements of automatic stamping forming of blanks of different profiles. Brief Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the module connection of the mold design system suitable for stamping forming of steel and aluminum designed by the present invention;

[0026] Figure 2 It is a schematic diagram of the process surface of the blank in the present invention;

[0027] Figure 3 It is a three-dimensional view of the lower punch in the present invention;

[0028] Figure 4 It is a schematic diagram of the connection structure of the lower punch insert in the present invention;

[0029] Figure 5 It is a three-dimensional view of the blank holder in the present invention;

[0030] Figure 6 It is a three-dimensional view of the upper female die in the present invention;

[0031] Figure 7 It is a top view of the upper female die model in the present invention;

[0032] Figure 8 It is a three-dimensional view of the stamping mold designed by the present invention;

[0033] Figure 9 It is a vertical cross-sectional view in the middle of the stamping mold when the upper female die contacts the blank in the present invention;

[0034] Figure 10 It is a vertical cross-sectional view in the middle of the stamping mold when stamping is completed in the present invention;

[0035] Among them, 1 is the process surface generation module, 2 is the model construction module, 3 is the simulation stamping forming module, 4 is the simulation stamping optimization module, 5 is the die forming module, 6 is the blank process surface, 7 is the upper die model, 8 is the blank holder model, 9 is the lower punch model, 10 is the process supplementary surface, 11 is the blank holding surface, 12 is the draw bead of the upper die, 13 is the blank holding process surface, 14 is the draw bead of the blank holder, 15 is the product surface, 16 is the upper die, 17 is the blank holder, 18 is the lower punch, 19 is the insert of the upper die, 20 is the insert of the lower punch, 21 is the screw, 22 is the pin, 23 is the lower die base, 24 is the upper die base. Detailed implementation mode

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] As Figure 1 shown, the die design system applicable to the stamping forming of steel and aluminum designed by the present invention includes a process surface generation module 1, a model construction module 2, a simulation stamping forming module 3, a simulation stamping optimization module 4 and a die forming module 5;

[0038] Taking the stamping forming of a fender as an example, as Figure 2 shown, the process surface generation module (which can also be called the surface generation module) 1 is used to generate the blank process surface 6;

[0039] The model construction module 2 constructs the product surface 15 of the lower punch model 9 according to the digital model characteristics of the blank process surface 6 and the design standard of the aluminum plate process surface; constructs the process supplementary surface 10 of the upper die model 7 according to the surface characteristics of the product surface 15 and the design standard of the aluminum plate process surface; constructs the blank holding surface 11 and the draw bead 12 of the upper die of the upper die model 7 according to the surface characteristics of the product surface 15, the surface characteristics of the process supplementary surface 10 and the design standard of the aluminum plate process surface; constructs the blank holding process surface 13 and the draw bead 14 of the blank holder of the blank holder model 8 according to the surface characteristics of the blank holding surface 11, the shape and layout area of the draw bead 12 of the upper die and the design standard of the aluminum plate process surface.

[0040] The simulation stamping forming module 3 is used to perform simulation stamping on the aluminum blank through the upper die model 7, the blank holder model 8 and the lower punch model 9 to determine the process supplementary surface 10, the blank holding surface 11, the draw bead 12 of the upper die of the upper die model 7; the blank holding process surface 13, the draw bead 14 of the blank holder of the blank holder model 8 and the product surface 15 of the lower punch model 9.

[0041] The simulation stamping optimization module 4 is used to perform simulation stamping on a steel blank by using an upper die model 7 that determines a process supplementary profile 10, a blank holding surface 11, and upper die draw beads 12; a blank holder model 8 that determines a blank holding process surface 13 and blank holder draw beads 14; and a lower punch model 9 that determines a product surface 15, and optimize the upper die draw beads 12 and the blank holder draw beads 14. Specifically, the simulation stamping optimization module 4 optimizes the upper die draw beads 12 by generating the upper die draw beads 12 on the premise that the process supplementary profile 10 and the product surface 15 remain unchanged, comparing the upper die draw beads 12 obtained by performing simulation stamping on an aluminum blank with the upper die model 7 and the upper die draw beads 12 obtained by performing simulation stamping on a steel blank with the upper die model 7, and retaining the same parts of the two. The simulation stamping optimization module 4 optimizes the blank holder draw beads 14 by generating the blank holder draw beads 14 on the premise that the process supplementary profile 10 and the product surface 15 remain unchanged, comparing the blank holder draw beads 14 obtained by performing simulation stamping on an aluminum blank with the blank holder model 8 and the blank holder draw beads 14 obtained by performing simulation stamping on a steel blank with the blank holder model 8, and retaining the same parts of the two.

[0042] The die forming module 5 is used to generate an upper die 16 according to the process supplementary profile 10, the blank holding surface 11, and the upper die draw beads 12 before and after optimization; generate a blank holder 17 according to the blank holding process surface 13 and the optimized blank holder draw beads 14; and generate a lower punch 18 according to the product surface 15 and the blank holder draw beads 14 before and after optimization. Specifically, the die forming module 5 generates the upper die 16 according to the process supplementary profile 10, the blank holding surface 11, and the upper die draw beads 12 before and after optimization, including comparing the upper die draw beads 12 obtained by performing simulation stamping on an aluminum blank with the upper die model 7 and the upper die draw beads 12 obtained by performing simulation stamping on a steel blank with the upper die model 7, and generating different upper die inserts 19 for the different parts of the two. The die forming module 5 generates the lower punch 18 according to the product surface 15 and the upper die draw beads 12 before and after optimization, including comparing the blank holder draw beads 14 obtained by performing simulation stamping on an aluminum blank with the blank holder model 8 and the blank holder draw beads 14 obtained by performing simulation stamping on a steel blank with the blank holder model 8, and generating different lower punch inserts 20 for the different parts of the two.

[0043] As Figure 3 shown in FIG. -7, the die design method based on the above die design system applicable to steel and aluminum stamping forming includes the following steps:

[0044] S1: Construct a blank process surface 6 required in the forming analysis process of a stamping die through forming analysis software, and construct an upper die 16, a blank holder 17, and a lower punch 18 on this basis, specifically as follows:

[0045] S11: Based on the aluminum plate as the basic surface, according to the design standard of the aluminum plate process surface, construct the product surface 15 according to the blank process surface 6, and construct the process supplementary surface 10 of the upper female die 16 according to the product surface 15;

[0046] S12: According to the characteristics of the product surface 15, the process supplementary surface 10 and the design standard of the aluminum plate process surface, construct the blank holding surface 11 of the upper female die 16 and the shape and layout area of the draw beads of the upper female die 12;

[0047] S13: According to the process surface of the upper female die 16 (including the process supplementary surface 10, the blank holding surface 11 and the draw beads of the upper female die 12), construct the process surface of the blank holder 17 (the blank holding process surface 13 and the draw beads of the blank holder 14).

[0048] S2: Carry out stamping die forming on the aluminum plate process surface constructed in S1. Through stamping forming analysis software, conduct stamping forming simulation analysis of the parts for the Figure 2 shown aluminum plate blank;

[0049] S21: According to the forming analysis results, conduct process optimization analysis on the stamping die process surface, and obtain two groups of stamping forming surfaces respectively, including the main surfaces of the upper concave and lower convex dies, that is, the process supplementary surface 10 and the product surface 15; the blank holding surface 11, the draw beads of the upper female die 12; the process surface of the blank holder 13 and the draw beads of the blank holder 14; and the corresponding process parameter combinations. There is still a certain difference between the stamping forming surface at this stage and the target stamping forming surface.

[0050] S3: Taking the aluminum plate material with great forming difficulty as the scheme benchmark, use the main die surface obtained by aluminum plate process optimization simulation to conduct forming analysis simulation again for the steel plate blank in combination with step S21.

[0051] S4: Conduct optimization analysis on the stamping die process surface of the steel plate blank obtained in the above step S3 to ensure that, without changing the main die surface, optimize parameters such as the length L, width D, height H, quantity N, blank holding force F, forming force P, etc., until obtaining the process parameter combination that meets the steel plate forming requirements. The results of the comparative analysis of the steel plate, aluminum plate inflow volume, formability, and thinning amount of the fender drawing die proposed by the present invention should all meet the formability requirements of the steel plate and the aluminum plate.

[0052] S5: Based on the process surfaces of the dies corresponding to the two materials, focus on the differential parts and conduct block design for the die: adopt the insert block structure scheme to realize the quick replacement of the differential structure parts of the die in the two sets of schemes, ensure the common use of the die body, and the insert blocks are processed with identification codes containing insert block information for machine recognition through laser marking technology.

[0053] Such as Figure 8As shown in Figure 10, the lower punch part mainly includes a lower die base 23, a lower punch model 9, and lower punch inserts 20 (lower punch insert A or lower punch insert B). When producing a steel plate fender, first install lower punch insert A and perform stamping production. When producing an aluminum plate fender, remove lower punch insert A and then install upper and lower punch insert B for production. By switching the inserts on the lower punch, two parts made of different materials can be produced on the same set of dies.

[0054] The upper die part mainly includes an upper die base 24 and upper die inserts 19 (upper die insert A or upper die insert B). When producing a steel plate fender, first install upper die insert A and perform stamping production. When producing an aluminum plate fender, remove upper die insert A and then install upper die insert B for production. By switching upper die insert 19, two parts made of different materials can be produced on the same set of dies.

[0055] During die production, the upper die insert 19 is locked to the upper die model 7 by screws 21 and pins 22, and the upper die model 7 is locked to the upper die base 24. The lower punch insert 20 is locked to the lower punch model 9 by screws 21 and pins 22, and the lower punch model 9 is then locked to the lower die base 23 by screws 21 and pins 22. The upper die base 24 is locked to the production upper machine table through a clamping plate groove, and the lower die base 23 is locked to the production lower machine table through a clamping plate groove. When the upper machine table descends, it drives the upper die part to first contact and press the blank holder 17 to hold the material, and then continues to descend to cooperate with the lower die part to complete a stamping forming.

[0056] In the present invention, for processing of two materials, the processing mode is set for the press control system, and the two modes respectively correspond to parameters such as blank holding force, forming pressure, and stamping speed for the two materials. During the stamping forming process, the processing monitor equipped in the die process system can detect the type of processing material applicable to the current die; realize the matching linkage of the die and press forming parameters, and avoid processing errors.

[0057] The processing monitor mainly consists of a light source, an industrial camera, and a control system. Among them, the light source provides relatively stable lighting conditions for the camera, and the camera is used to photograph the die and sheet metal information; the control system records processing information, including insert parameters, sheet metal type, press parameters, and parameter change thresholds. The industrial camera obtains insert information by identifying the insert identification code; by taking pictures of the sheet metal surface and classifying according to the reflectivity and texture, the sheet metal type is determined. The processing monitor inputs the collected insert and sheet metal information into the control system, providing a judgment basis for the control system to output stamping process parameters and execution actions. Under the action of the processing monitor, the matching linkage of the die and press forming parameters is realized, and thus a drawing die can realize the stamping forming drawing process of two different materials of fenders.

[0058] The above are only the preferred embodiments of the present invention, and do not impose any formal restrictions on the structure of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A die design system applicable to the stamping of steel and aluminum, characterized in that: It includes a process surface generation module (1), a model construction module (2), a simulation stamping forming module (3), a simulation stamping optimization module (4) and a die forming module (5); The process surface generation module (1) is used to generate a blank process surface (6); The model construction module (2) is used to construct an upper die model (7), a blank holder model (8) and a lower punch model (9) according to the blank process surface (6); The simulation stamping forming module (3) is used to perform simulation stamping on an aluminum blank through the upper die model (7), the blank holder model (8) and the lower punch model (9) to determine the process supplementary surface (10), the blank holding surface (11), and the upper die draw beads (12) of the upper die model (7); the blank holding process surface (13), the blank holder draw beads (14) of the blank holder model (8) and the product surface (15) of the lower punch model (9); The simulation stamping optimization module (4) is used to perform simulation stamping on a steel blank through the upper die model (7) with the determined process supplementary surface (10), blank holding surface (11), and upper die draw beads (12); the blank holder model (8) with the determined blank holding process surface (13) and blank holder draw beads (14) and the lower punch model (9) with the determined product surface (15) to optimize the upper die draw beads (12) and the blank holder draw beads (14); the simulation stamping optimization module (4) optimizing the upper die draw beads (12) includes retaining the same part of the upper die draw beads (12) when the upper die model (7) performs simulation stamping on the aluminum blank and the upper die draw beads (12) when the upper die model (7) performs simulation stamping on the steel blank; the simulation stamping optimization module (4) optimizing the blank holder draw beads (14) includes retaining the same part of the blank holder draw beads (14) when the blank holder model (8) performs simulation stamping on the aluminum blank and the blank holder draw beads (14) when the blank holder model (8) performs simulation stamping on the steel blank; The die forming module (5) is used to generate an upper die (16) according to the process supplementary surface (10), the blank holding surface (11) and the upper die draw beads (12) before and after optimization, including generating different upper die inserts (19) for the different parts of the upper die draw beads (12) when the upper die model (7) performs simulation stamping on the aluminum blank and the upper die draw beads (12) when the upper die model (7) performs simulation stamping on the steel blank; generating a blank holder (17) according to the blank holding process surface (13) and the optimized blank holder draw beads (14); generating a lower punch (18) according to the product surface (15) and the blank holder draw beads (14) before and after optimization, including generating different lower punch inserts (20) for the different parts of the blank holder draw beads (14) when the blank holder model (8) performs simulation stamping on the aluminum blank and the blank holder draw beads (14) when the blank holder model (8) performs simulation stamping on the steel blank.

2. The mold design system applicable to steel and aluminum stamping as claimed in claim 1, characterized in that: The model construction module (2) constructs the lower punch model (9), including constructing the product surface (15) according to the digital model features of the blank process surface (6) and the design criteria of the aluminum plate process surface.

3. The mold design system applicable to the stamping of steel and aluminum according to claim 2, wherein: The model construction module (2) constructs the upper die cavity model (7), including constructing the process supplementary surface (10) according to the surface features of the product surface (15) and the design criteria of the aluminum plate process surface.

4. The mold design system applicable to the stamping of steel and aluminum as claimed in claim 3, wherein: The model construction module (2) constructs the upper die cavity model (7) and also includes constructing the blank holding surface (11) and the draw bead of the upper die cavity (12) according to the surface features of the product surface (15), the surface features of the process supplementary surface (10), and the design criteria of the aluminum plate process surface.

5. The die design system applicable to steel and aluminum stamping as claimed in claim 4, wherein: The model construction module (2) constructs the blank holder model (8), including constructing the blank holding process surface (13) and the draw bead of the blank holder (14) according to the surface features of the blank holding surface (11), the shape and arrangement area of the draw bead of the upper die cavity (12), and the design criteria of the aluminum plate process surface.

6. The mold design system applicable to steel and aluminum stamping as claimed in claim 1, wherein: The simulation stamping optimization module (4) optimizes the draw bead of the upper die cavity (12), including generating the draw bead of the upper die cavity (12) on the premise that the process supplementary surface (10) and the product surface (15) remain unchanged, comparing the draw bead of the upper die cavity (12) when the upper die cavity model (7) performs simulation stamping on the aluminum blank with the draw bead of the upper die cavity (12) when the upper die cavity model (7) performs simulation stamping on the steel blank, and retaining the same parts of the two.

7. The mold design system applicable to the stamping of steel and aluminum as described in claim 1, wherein: The simulation stamping optimization module (4) optimizes the draw bead of the blank holder (14), including generating the draw bead of the blank holder (14) on the premise that the process supplementary surface (10) and the product surface (15) remain unchanged, comparing the draw bead of the blank holder (14) when the blank holder model (8) performs simulation stamping on the aluminum blank with the draw bead of the blank holder (14) when the blank holder model (8) performs simulation stamping on the steel blank, and retaining the same parts of the two.

8. The mold design system applicable to the stamping of steel and aluminum as claimed in claim 6, characterized in that: The die forming module (5) generates the upper die cavity (16) according to the process supplementary surface (10), the blank holding surface (11), and the draw bead of the upper die cavity (12) before and after optimization, including comparing the draw bead of the upper die cavity (12) when the upper die cavity model (7) performs simulation stamping on the aluminum blank with the draw bead of the upper die cavity (12) when the upper die cavity model (7) performs simulation stamping on the steel blank, and generating different upper die cavity inserts (19) for the different parts of the two.

9. The mold design system applicable to the stamping of steel and aluminum according to claim 7, wherein: The die forming module (5) generates the lower punch (18) according to the product surface (15) and the draw bead of the upper die cavity (12) before and after optimization, including comparing the draw bead of the blank holder (14) when the blank holder model (8) performs simulation stamping on the aluminum blank with the draw bead of the blank holder (14) when the blank holder model (8) performs simulation stamping on the steel blank, and generating different lower punch inserts (20) for the different parts of the two.

10. A die design method for a die design system applicable to steel and aluminum stamping forming according to any one of the above claims 1 - 9 is as follows: including the following steps: Step 1: Generate the blank process surface (6); Step 2: Construct the upper die model (7), blank holder model (8), and lower punch model (9) according to the blank process surface (6). Step 3: Perform simulation stamping on the aluminum blank through the upper die model (7), blank holder model (8), and lower punch model (9) to determine the process supplementary surface (10), blank holding surface (11), and upper die draw bead (12) of the upper die model (7); the blank holding process surface (13), blank holder draw bead (14) of the blank holder model (8), and the product surface (15) of the lower punch model (9). Step 4: Perform simulation stamping on the steel blank through the upper die model (7) with the determined process supplementary surface (10), blank holding surface (11), and upper die draw bead (12); the blank holder model (8) with the determined blank holding process surface (13) and blank holder draw bead (14), and the lower punch model (9) with the determined product surface (15) to optimize the upper die draw bead (12) and blank holder draw bead (14); the optimized upper die draw bead (12) includes retaining the same part of the upper die draw bead (12) when the upper die model (7) performs simulation stamping on the aluminum blank and the upper die draw bead (12) when the upper die model (7) performs simulation stamping on the steel blank; the optimized blank holder draw bead (14) includes retaining the same part of the blank holder draw bead (14) when the blank holder model (8) performs simulation stamping on the aluminum blank and the blank holder draw bead (14) when the blank holder model (8) performs simulation stamping on the steel blank. Step 5: Generate the upper die (16) according to the process supplementary surface (10), blank holding surface (11), and upper die draw bead (12) before and after optimization, including generating different upper die inserts (19) for the different parts of the upper die draw bead (12) when the upper die model (7) performs simulation stamping on the aluminum blank and the upper die draw bead (12) when the upper die model (7) performs simulation stamping on the steel blank; generate the blank holder (17) according to the blank holding process surface (13) and the optimized blank holder draw bead (14); generate the lower punch (18) according to the product surface (15) and the blank holder draw bead (14) before and after optimization, including generating different lower punch inserts (20) for the different parts of the blank holder draw bead (14) when the blank holder model (8) performs simulation stamping on the aluminum blank and the blank holder draw bead (14) when the blank holder model (8) performs simulation stamping on the steel blank.

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