Die structure considering development, mass production and die holder universality

Abstract

The utility model discloses a die structure giving consideration to development, mass production and die holder universality, which comprises a split female die, a split male die, a blank holder, an upper die holder and a lower die holder, a plurality of U-shaped mounting grooves are uniformly distributed at the bottom of the split female die and the split male die in the circumferential direction, and a first guide structure is arranged on the inner ring surface of the blank holder. A second guiding structure in sliding fit with the first guiding structure is arranged on the peripheral face of the split male die, a guiding inserting plate is detachably installed on the peripheral face of the split female die, a guiding inserting groove in sliding fit with the guiding inserting plate is formed in the periphery of the blank holder, the upper die base and the lower die base are of a plate type structure, and an upper die base guiding base is matched with a lower die base guiding leg for guiding. According to the die structure, fixing, guiding and supporting structures which are both used in the soft die development stage and the normal die mass production stage are designed at the same time, the split concave-convex die and the blank holder which are successfully developed can be continuously used after heat treatment is completed, the upper die base and the lower die base are subjected to universal design and can be matched with different dies to be repeatedly used, and therefore the die development period is shortened, and the production efficiency is improved. The development cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mold development technology, specifically to a mold structure that takes into account development, mass production and mold base versatility. Background Technology

[0002] China's automotive industry has experienced rapid development for nearly 20 years, with the pace of model updates accelerating. Automotive body panel mold development, as a necessary step in the mass production development of new models, accounts for a significant portion of the tooling costs for new car development. The fundamental reasons for the high mold costs during the mold development process include: 1. After older models are completely withdrawn from the market, the split-type punches and mold bases can only be scrapped and cannot be reused, increasing asset costs due to the long-term deferred costs of molds for each model; 2. Soft molds used for prototype testing and small-batch production in the early stages of new model development are discarded after the successful development of mass production molds, as they cannot be reused in mass production, thus increasing development costs.

[0003] Existing side-wall drawing dies are mostly external guide dies, also called box dies. They include upper and lower die bases, separate punches, separate dies, and pressure rings. They are highly specific, and their structure can only meet the needs of the specific vehicle model during mass production. Soft mold structures developed during the development process cannot be reused due to reasons such as inability to assemble with the die base structure. Furthermore, the structure of the upper and lower die bases is difficult to match with the die structures of other vehicle models, making the die bases lack versatility.

[0004] Therefore, as an important part of automobile development, mold development should be designed with both consideration and versatility in order to reduce automobile development costs, and corresponding mold development methods for cost reduction and efficiency improvement should be proposed. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects in the prior art and provide a mold structure that takes into account development, mass production and mold base versatility, so as to overcome one or more problems caused by the limitations and defects of related technologies to a certain extent.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A mold structure that takes into account development, mass production and mold base versatility includes a split die, a split punch, a pressure ring, an upper mold base and a lower mold base. The bottom of the split die and the split punch are each circumferentially and evenly arranged with several U-shaped mounting grooves.

[0008] During the development phase, the split die is mounted on the upper table of the machine tool via a U-shaped mounting groove, and the split punch is mounted on the lower table of the machine tool. The blank holder is supported on the lower table by a floating support system. A first guide structure is provided along the inner surface of the blank holder, and a second guide structure is provided on the outer circumferential surface of the split punch. The second guide structure slides and guides the first guide structure to guide the Z-axis floating of the blank holder. Several downwardly extending guide plates are detachably mounted on the outer circumferential surface of the split die, and several guide slots are opened on the outer circumference of the blank holder. The guide plates slide and guide slots to guide the Z-axis stamping of the split die.

[0009] In the mass production stage, the upper and lower die bases are plate-type structures. The lower surface of the upper die base is machined to form an upper mounting surface, and the upper surface of the lower die base is machined to form a lower mounting surface. The reinforced split die and split punch are mounted on the upper and lower mounting surfaces respectively through U-shaped mounting grooves. Two guide seats are symmetrically extended downwards on both sides of the upper die base, and multi-directional guide grooves are provided on the guide seats. Two guide legs are symmetrically protruded upwards on both sides of the lower die base, and the guide legs slide with the guide grooves to guide the Z-axis stamping of the upper die base and the split die. The blank holder is supported on the lower platform by a floating support system and guided by a second guide structure. Several limiting blocks are designed along the Z-axis on the front and rear sides of the upper and lower die bases. The limiting blocks on the upper die base are aligned with the limiting blocks on the lower die base directly below them and cooperate to achieve stamping limiting. Several column holes penetrating the lower die base are vertically opened on the lower mounting surface to allow space for the floating support system.

[0010] Furthermore, the floating support system includes several air-jacking support columns located directly below the pressure ring. These air-jacking support columns are evenly distributed in a ring shape corresponding to the shape of the pressure ring. The air-jacking support column is a two-section pluggable structure, consisting of a base column and a connecting column. The base column is inserted into the air rod hole on the lower platform, and the connecting column passes through the column hole, which is used to adapt to the thickness of the lower mold base during mass production.

[0011] Furthermore, the lower edge of the pressure ring is provided with several evenly distributed limiting grooves, and the lower mold base is provided with several limiting mounting holes for installing the limiting rod. The upper end of the limiting rod is locked in the limiting groove to prevent the pressure ring from dislodging.

[0012] Furthermore, the two sides of the split punch are respectively provided with positioning U-grooves for quick positioning. The positioning U-grooves are located on the quick positioning line of the lower die base. Positioning pins are respectively provided on the upper edge of the lower die base along the quick positioning line for positioning in conjunction with the positioning U-grooves.

[0013] Furthermore, both sides of the lower mold base are also provided with quick positioning slots, which are arranged on the quick positioning line. A machine tool positioning pin is provided on the lower table along its center line. The machine tool positioning pin cooperates with the quick positioning slot for positioning, which is used for quick positioning of the lower mold base.

[0014] Furthermore, the second guide structure includes several first guide plates located on the front and rear sides of the split punch and several second guide plates on the left and right sides. The guide surfaces of the first guide plates are all parallel to the front plane, and the second guide plates are parallel to the side plane. The first guide plates and the second guide plates protrude from the outer periphery of the split punch.

[0015] Compared with the prior art, the mold structure of this utility model, which takes into account development, mass production and mold base versatility, has the following beneficial effects:

[0016] This mold structure incorporates a dual-purpose design for both the soft mold development stage and the normal mold mass production stage, providing a fixed, guiding, and supporting structure. This allows the successfully developed split die, split punch, and blank holder to be reused after heat treatment. Furthermore, the upper and lower mold bases are designed for versatility, changing the traditional guiding and fixing methods for the mold base and split punch / blade holder. The upper and lower mold bases can be reused by matching other cover part drawing dies, thus shortening the overall mold development cycle and reducing development costs. The mold structure development method also includes specific details of dual-purpose and versatile design, utilizing the machine tool mounting coordinates of the successfully developed soft mold to directly machine the mold base mounting structure, shortening the mold base development cycle and assembly time, and efficiently ensuring assembly accuracy. Attached Figure Description

[0017] Figure 1 This is an exploded view of the assembly of the soft mold disclosed in this utility model;

[0018] Figure 2 This is an exploded assembly view of the mold structure disclosed in this utility model;

[0019] Figure 3 This is a front view of the soft mold disclosed in this utility model assembled on a machine tool;

[0020] Figure 4 A three-dimensional view of the blank holder being assembled on the lower machine tool table;

[0021] Figure 5 This is a bottom view of the lower mold base.

[0022] In the diagram: 1. Split punch; 1a. Second guide structure; 1b. U-shaped mounting groove; 2. Pressure ring; 2a. Guide slot; 2b. First guide structure; 2c. Limiting groove; 3. Split die; 4. Guide plate; 5. Lower die base; 5a. Guide leg; 5b. Quick positioning groove; 5c. Column hole; 5d. Pin hole; 6. Upper die base; 6a. Limiting seat; 6b. Guide seat; 7. Air ejector support column; 8. Limiting rod; 9. Lower table; 9a. Sliding mounting groove; 9b. Air rod hole; 9c. Machine tool pin hole; 10. Upper table; 11. Pressure plate assembly. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only the best embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] like Figures 1-5 This embodiment provides a mold structure that takes into account development, mass production, and mold base versatility, mainly referring to a side-wall drawing mold structure. Such mold structures include a split die 3, a split punch 1, a blank holder 2, an upper mold base 6, and a lower mold base 5. During the development stage, the split die 3, split punch 1, and blank holder 2 require surface machining but do not require heat treatment of the material. This development stage of the split die 3, split punch 1, and blank holder 2 is collectively referred to as a soft mold. Soft mold development is time-consuming, and existing technologies generally discard successfully developed soft molds. Therefore, the structural design of soft molds does not consider the design details of normal molds in the mass production stage, and the design of normal molds does not consider the design details of soft mold processing. Furthermore, existing side-wall drawing molds are highly specific; firstly, the split die 3 is installed inside the upper mold base 6, and secondly, the blank holder 2 is guided by the lower mold base 5, resulting in the upper and lower mold bases not being interchangeable.

[0025] This leads to the mold structure of this technical solution. To facilitate flexible installation and fixation on the machine tool and upper and lower mold bases 5, several U-shaped mounting grooves 1b are evenly arranged circumferentially on the bottom of the split die 3 and the split punch 1, such as... Figure 1 As shown, since the assembly of the split die 3 is simple, its U-shaped mounting groove 1b can be located on the step surface of the bottom plate of the split die 3. The split punch 1 is inserted into the pressure ring 2. Its peripheral space is insufficient. Therefore, the U-shaped mounting groove 1b is formed by the concave peripheral surface of the split punch 1 to provide operating and accommodating space.

[0026] During the development phase, the soft mold is directly assembled onto the machine tool. The machine tool's mounting system includes a pressure plate assembly 11, a travel limit assembly, a machine tool positioning pin, and a pneumatic rod hole 9b. The two sides of the split punch 1 are provided with positioning U-grooves for quick positioning (not shown in the figure, but their structure is the same as that of the quick positioning groove 5b). The machine tool positioning pin on the machine tool centerline is used to quickly position the split punch 1. Multiple sliding mounting grooves 9a are opened on the machine tool upper table 10 and lower table 9. The pressure plate assembly 11 and the travel limit assembly slide and are locked in the sliding mounting grooves 9a. The positioning and installation of the split die 3 and the split punch 1 are achieved by the cooperation of the pressure plate assembly 11 with the U-shaped mounting groove 1b. A floating support system is inserted into the machine tool pneumatic rod hole 9b to support the pressure ring 2. The travel limit assembly is pushed into the sliding mounting groove 9a. The travel limit assembly cooperates with the limiting groove 2c at the lower end of the outer periphery of the pressure ring 2 to limit the stroke of the pressure ring 2.

[0027] For guiding the soft mold, since there is no sliding guide between the upper platform 10 and the lower platform 9, it is considered to create a guide on the soft mold to balance development and mass production. The relative sliding guide between the split punch 1 and the blank holder 2 adopts an internal guide, such as... Figure 1 and Figure 4 As shown, a first guide structure 2b is provided along the inner ring surface of the pressure ring 2, and a second guide structure 1a is provided on the outer peripheral surface of the split punch 1 to cooperate with the first guide structure 2b. Since the outer peripheral surface of the split punch 1 and the inner peripheral surface of the pressure ring 2 are extremely irregular curved surfaces and are nested together, with their upper ends being extended protruding surfaces, the first guide structure 2b and the second guide structure 1a need to be distributed to adapt to the curved surfaces. In order to improve the guidance of the unique Z-axis degree of freedom and its guidance accuracy, the second guide structure 1a includes several first guide plates located on the front and rear sides of the split punch 1 and several second guide plates located on the left and right sides. The outer peripheral surface of the split punch 1 protrudes to form the mounting plane of the first guide plates and the second guide plates, and ensures flatness. The first guide plates located on the front and rear sides should be parallel to the positive plane, i.e. Figure 1 In the view shown, the second guide plate is parallel to the side plane, the side plane is along the Z direction and perpendicular to the front plane, the first guide plate and the second guide plate are installed on the mounting plane, and the first guide structure 2b is set according to the same distribution structure;

[0028] The relative sliding guide between the split die 3 and the pressure ring 2 adopts external guidance. A slot for inserting a plate is opened on the circumference of the split die 3. The slot for inserting a guide plate 4 can be detachably installed. At the same time, several guide slots 2a are machined on the outer circumference of the pressure ring 2. Similarly, the bottom surfaces of the guide slots 2a on the front and rear sides of the pressure ring 2 are parallel to the front plane, and the bottom surfaces of the guide slots 2a on the left and right sides are parallel to the side plane. The inner plane of the guide plate 4 matches the bottom surface of the guide slot 2a, realizing the guidance of the split die 3 in the Z direction, which is the only degree of freedom. Since the guide plate 4 and the guide slot 2a are only used in the trial production process of the soft mold, the guide plate does not need to be configured in the guide slot 2a.

[0029] The split die 3 is mounted on the upper table 10 of the machine tool through the U-shaped mounting groove 1b, and the split punch 1 is mounted on the lower table 9 of the machine tool. The blank holder 2 is supported on the lower table 9 by a floating support system. A first guide structure 2b is provided on the inner ring surface of the blank holder 2, and a second guide structure 1a is provided on the outer peripheral surface of the split punch 1. The second guide structure 1a and the first guide structure 2b are slidably matched and guided to guide the Z-direction floating of the blank holder 2. Several downwardly extending guide plates 4 are detachably mounted on the outer peripheral surface of the split die 3, and several guide slots 2a are opened on the outer peripheral surface of the blank holder 2. The guide plates 4 and the guide slots 2a are slidably matched to guide the Z-direction stamping of the split die 3.

[0030] During mass production, since the soft mold with the above structure fully considers the technical details of the normal mold, the successfully developed soft mold can be reused as a normal mold after heat treatment. In order to adapt to the installation of the mold structure and to take into account versatility, unlike the existing technology, the upper mold base 6 and the lower mold base 5 are designed as plate structures, and their dimensions and structure do not need to be adapted to the shape of the soft mold. The lower surface of the upper mold base 6 is machined with a horizontal upper mounting surface, and the upper surface of the lower mold base 5 is machined with a horizontal lower mounting surface. At the same time, mounting holes are machined at corresponding positions on both the upper and lower mounting surfaces. The split die 3 and the split punch 1 are respectively connected to the mold by bolt assemblies. The U-shaped mounting groove 1b is connected and fixedly installed on the upper and lower mounting surfaces. At the same time, two guide seats 6b are integrally formed by symmetrically extending downwards on both sides of the upper mold base 6. The guide seats 6b are provided with guide grooves. The guide grooves have front and rear guide groove planes parallel to the front plane and groove side planes parallel to the side planes. Guide plates can be detachably installed on the front and rear guide groove planes and groove side planes. Two guide legs 5a are symmetrically protruded upwards on both sides of the lower mold base 5. Similarly, guide plates are provided on the planes of the guide legs 5a that cooperate with the front and rear guide groove planes and groove side planes for sliding guidance. The guide between the upper and lower mold bases 5 replaces the Z-direction stamping guide of the split die 3 during the soft mold development stage.

[0031] The upper die holder 6 and the lower die holder 5 have several limiting seats 6a protruding in the Z direction along their upper ends on the front and rear sides. The limiting seats 6a on the upper die holder 6 are aligned with the limiting seats 6a on the lower die holder 5 directly below it and cooperate to achieve stamping limiting.

[0032] According to the distribution pattern of the air rod holes 9b on the lower table 9 of the machine tool, multiple column holes 5c are opened vertically and through the lower mounting surface of the lower mold base 5 for the installation of the floating support system. In order to adapt to the different support length requirements in the soft mold development stage and the mass production stage, the floating support system includes several air top support columns 7 set directly below the pressure ring 2 for support. The air top support column 7 is a two-section pluggable structure, which includes a base column and a connecting column. The length of the connecting column should be adapted to the thickness of the lower mold base 5 plate. In the soft mold development stage, the base column can be used as the support for the pressure ring 2. The base column is evenly distributed in a ring shape corresponding to the shape of the pressure ring 2. In the mass production stage, according to the arrangement of the base column, the connecting column is inserted into the corresponding column hole 5c and plugged into the upper end of the base column.

[0033] In addition, a threaded mounting hole for a limiting rod 8 is machined on the lower mounting surface of the lower mold base 5. The upper end of the limiting rod 8 is locked in the limiting groove 2c to prevent the pressure ring 2 from dislodging.

[0034] To quickly position the split punch 1, positioning U-grooves are provided on both sides of the split punch 1 for rapid positioning. The two positioning U-grooves are collinear, and this line is defined as the rapid positioning line. The rapid positioning line is generally the symmetrical center line of the lower die holder 5, such as... Figure 4As shown, a row of pin holes 5d is provided on the lower mold base 5 along its rapid positioning line according to the machine tool distribution law, or a special pin hole 5d is opened according to the spacing of the two positioning U grooves combined with the machine tool distribution law. The positioning pin inserted in the pin hole 5d cooperates with the positioning U groove to restrict the lateral and longitudinal degrees of freedom of the split punch 1 and quickly position the split punch 1.

[0035] The lower mold base 5 also has quick positioning slots 5b on both sides, such as... Figure 5 As shown, similarly, the straight line determined by the two collinear quick-positioning slots 5b is the quick-positioning line of the lower mold base 5, as follows. Figure 5 As shown, machine tool positioning pins are provided along the center line of the lower table 9 of the machine tool. The machine tool positioning pins are located in the machine tool pin holes 9c. The machine tool positioning pins cooperate with the quick positioning slots 5b for positioning. This can quickly position the lower mold base 5 and facilitate the rapid conversion between the machine tool coordinate system and the lower mold base coordinate system.

[0036] Based on the above mold structure design schemes, a mold structure development method that takes into account development, mass production, and mold base versatility is proposed, including the following steps:

[0037] S1: In the soft mold design stage, comprehensive consideration must be taken into account in the design of the mold structure to improve the adaptability of the mold structure. The installation system structure of the machine tool is immutable. In order to improve the versatility of the normal mold, the distribution design of the U-shaped mounting groove 1b of the split die 3 and the split punch 1 and the limiting groove 2c on the pressure ring 2 conforms to the distribution of the sliding mounting groove 9a of the upper table 10 and the lower table 9 of the machine tool. The positioning U-groove position of the split punch 1 and the quick positioning groove 5b of the lower mold base 5 conform to the distribution of the machine tool positioning pins on the center line of the lower table 9 of the machine tool. This consideration includes at least the hole spacing pattern, hole size and the safety distance of the original hole positions on the upper and lower mold bases 5. The design of the U-shaped mounting groove 1b, the limiting groove 2c, and the positioning U-groove should reserve a safe distance from the center of the air rod hole 9b on the lower platform 9. According to the distribution pattern of the air rod hole 9b, the guide table and specifications for selecting the screw hole installation position should be made. The U-shaped mounting groove 1b and the limiting groove 2c in the soft mold design should be selected or designed according to the guide table and specifications to facilitate the design and processing of the corresponding mounting holes on the lower mold base 5, which will help improve the structural strength and versatility of the mold base.

[0038] The split die 3, split punch 1, and pressure ring 2 in the soft mold stage are not heat treated;

[0039] S2: In the soft mold development stage, the split die 3, split punch 1, and pressure ring 2 are installed using the machine tool's mounting system. First, the split punch 1 is positioned and installed. Two pin holes 5d at appropriate positions on the lower table 9 of the machine tool are selected. After aligning the positioning U-grooves on both sides of the split punch 1 with the two pin holes 5d, the machine tool positioning pins are inserted to achieve rapid positioning. The pressure plate assembly 11 is pushed into the positioning U-grooves from the sliding mounting groove 9a. The studs of the pressure plate assembly 11 are engaged with the end holes of the positioning U-grooves. The upper pressure plate is tightened along the studs of the pressure plate assembly 11, so that the upper pressure plate and the lower pressure plate, which is locked in the sliding mounting groove 9a, clamp the positioning U-grooves between them. After aligning the split die 3 with the split punch 1, the split die 3 is installed and fixed using the pressure plate assembly 11 in the above manner.

[0040] Install a floating support system, such as Figure 4 As shown, if the pressure ring 2 has an inner ring, the inner ring limit component should first be pushed into the pressure ring 2 through the sliding mounting groove 9a. According to the structure of the pressure ring 2 and the inner ring, a suitable air rod hole 9b is selected to arrange the air top support column 7 in a ring. The air top support column 7 only uses the base column section, which is inserted into the air rod hole 9b on the lower table 9. The pressure ring 2 is slidably installed outside the split punch 1, and the inner ring is inserted into the guide cavity inside the split punch 1. They are floated and supported by the base column sections at their bottoms. The limit component configured by the machine tool is installed. The limit rod of the limit component cooperates with the limit groove 2c. Its top has a limit plate to limit the maximum floating stroke of the pressure ring 2 or the inner ring. The guide plate 4 on the split die 3 is installed. The guide plate 4 cooperates with the guide slot 2a to complete the sliding assembly between the split die 3, the pressure ring 2, and the split punch 1.

[0041] The surface contouring process of the combined split die 3, pressure ring 2 and split punch 1 is carried out according to the process specifications.

[0042] S3: After the soft mold is successfully developed, the upper mold base 6 and the lower mold base 5 are processed according to the installation information of the soft mold. Since the development stage fully considers the adaptability installation structure design of the split die 3, split punch 1 and pressure ring 2, the upper mold base 6 and the lower mold base 5 are processed directly using the positioning and installation information of the machine tool.

[0043] The machine tool coordinate system is established by combining the center line on the lower table 9 with the pin hole 5d or the symmetry line of the lower table 9. The positioning coordinates of the split die 3, split punch 1, pressure ring 2 and floating support system on the machine tool are recorded respectively. The positioning coordinates are mainly two-dimensional coordinates in the horizontal dimension. Several pin holes 5d can be pre-processed on the mounting surface according to the distribution law of the pin holes 5d on the lower table 9 of the machine tool along its rapid positioning line. According to the actual structural size of the split punch 1, it is moved according to the unit spacing of the sliding mounting groove 9a to adapt to the lower mounting surface area, so that the machining coordinate system determined by the rapid positioning line of the lower die base 5 is adapted to coincide with the machine tool coordinate system. Using the established coordinate system, the various mounting holes and column holes 5c on the lower die base 5 are machined with reference to the recorded positioning coordinates. The upper die base 6 and the lower die base 5 are mirrored and have a mating relationship. The corresponding coordinate system of the upper die base 6 can be quickly obtained by reference transformation, and the various mounting holes on the upper die base 6 are machined according to the recorded positioning coordinates.

[0044] S4: Enter the mass production stage, and perform heat treatment processing on the split die 3, split punch 1 and pressure ring 2 according to the process specifications.

[0045] S5: During the mass production stage, the normal mold assembly is performed by using screw assemblies to connect the U-shaped mounting grooves 1b of the split die 3 and split punch 1 to the corresponding mounting holes. The air ejector support column 7 is connected by a base column and a connecting column. The pressure ring 2 is installed, and the length of the limit rod 8 on the limit groove 2c of the pressure ring 2 is adjusted to set the maximum floating stroke. During the mold assembly process, considering the assembly error caused by heat treatment deformation, thin pads are set under the split die 3, split punch 1 and pressure ring 2 to eliminate the assembly error.

[0046] In a normal mold, the guide for the split cavity mold 3 is the guide between the upper mold base 6 and the lower mold base 5. Therefore, the guide plate 4 used in the soft mold development stage is removed.

[0047] The lower mold base 5 is quickly positioned on the lower table 9 using the quick positioning groove 5b on the lower mold base 5. The upper mold base 6 and the lower mold base 5 are also arranged with multiple U-shaped mounting grooves 1b around their bottoms. The upper mold base 6 and the lower mold base 5 are fixedly installed using the pressure plate assembly 11 of the machine tool.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold structure that balances development, mass production, and mold base versatility, characterized in that: It includes a split die, a split punch, a pressure ring, an upper die base, and a lower die base. The bottom of the split die and the split punch are each uniformly arranged with several U-shaped mounting grooves in the circumferential direction. During the development phase, the split die is mounted on the upper table of the machine tool via the U-shaped mounting groove, and the split punch is mounted on the lower table of the machine tool. The blank holder is supported on the lower table by a floating support system. A first guide structure is provided along the inner surface of the blank holder, and a second guide structure is provided on the outer circumferential surface of the split punch. The second guide structure slides and guides the first guide structure to guide the Z-axis floating of the blank holder. Several downwardly extending guide plates are detachably mounted on the outer circumferential surface of the split die, and several guide slots are opened on the outer circumference of the blank holder. The guide plates slide and guide slots to guide the Z-axis stamping of the split die. In the mass production stage; the upper mold base and the lower mold base are plate-type structures. The lower surface of the upper mold base is machined to form an upper mounting surface, and the upper surface of the lower mold base is machined to form a lower mounting surface. The reinforced split die and the split punch are respectively mounted on the upper mounting surface and the lower mounting surface through the U-shaped mounting groove. Two guide seats are symmetrically extended downwards on both sides of the upper mold base, and the guide seats are provided with multi-directional guide grooves. Two guide legs are symmetrically protruded upwards on both sides of the lower mold base, and the guide legs slide with the guide grooves. The upper die holder and the split die are used to guide the Z-axis stamping of the die holder and the pressure ring. The pressure ring is supported on the lower platform by the floating support system and guided by the second guide structure. Several Z-axis protruding limiting blocks are designed on the front and rear sides of the upper die holder and the lower die holder. The limiting blocks on the upper die holder are aligned with the limiting blocks on the lower die holder directly below them and cooperate to achieve stamping limiting. Several vertically protruding column holes are opened on the lower mounting surface to allow space for the floating support system.

2. The mold structure according to claim 1, which takes into account development, mass production, and mold base versatility, is characterized in that: The floating support system includes several air-jacking support columns located directly below the pressure ring. These air-jacking support columns are evenly distributed in a ring shape corresponding to the shape of the pressure ring. Each air-jacking support column is a two-section pluggable structure, consisting of a base column and a connecting column. The base column is inserted into the air rod hole on the lower platform, and the connecting column passes through the column hole to adapt to the thickness of the lower mold base during mass production.

3. The mold structure according to claim 2, which takes into account development, mass production, and mold base versatility, is characterized in that: The lower edge of the pressure ring is provided with several evenly distributed limiting grooves, and the lower mold base is provided with several limiting mounting holes for installing limiting rods. The upper end of the limiting rod is locked in the limiting groove to prevent the pressure ring from dislodging.

4. The mold structure according to claim 3, which takes into account development, mass production, and mold base versatility, is characterized in that: The split punch is provided with positioning U-grooves on both sides for quick positioning. The positioning U-grooves are located on the quick positioning line of the lower die base. Positioning pins are provided on the lower die base along the quick positioning line for positioning in conjunction with the positioning U-grooves.

5. The mold structure according to claim 4, which takes into account development, mass production, and mold base versatility, is characterized in that: Both sides of the lower mold base are also provided with quick positioning slots, which are arranged on the quick positioning line. A machine tool positioning pin is provided on the lower table surface along its center line. The machine tool positioning pin cooperates with the quick positioning slot for positioning, which is used for quick positioning of the lower mold base.

6. The mold structure according to claim 1, which takes into account development, mass production, and mold base versatility, is characterized in that: The second guide structure includes several first guide plates located on the front and rear sides of the split punch and several second guide plates on the left and right sides. The guide surfaces of the first guide plates are all parallel to the front plane, and the second guide plates are parallel to the side plane. The first guide plates and the second guide plates protrude from the periphery of the split punch.

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