Stamping die

Abstract

The utility model discloses a stamping die which comprises a lower die assembly, the lower die assembly comprises a lower die base and a female die, and the female die is installed on the lower die base. The upper die assembly comprises an upper die base and a male die, the male die is installed on the upper die base and corresponds to the female die, the upper die base is movably installed on the lower die base, and the upper die base is configured to be capable of driving the male die to move in the direction close to or away from the female die; a first installation cavity is formed in the upper die base, a first elastic structure is installed in the first installation cavity, one end of the male die is movably installed in the first installation cavity and connected with the first elastic structure, the other end of the male die extends out of the first installation cavity and corresponds to the female die, and elastic force towards the female die is provided for the male die through the first elastic structure. Before the upper die base reaches the lower limit position and in the stroke of returning after stamping is finished, the male die and the female die are kept in a closed state all the time, so that a workpiece has double staying and pressure maintaining time, and the stability of stamping machining and the forming quality and precision of the workpiece are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping processing, in particular to a stamping die. Background Art

[0002] In the mechanical processing industry, stamping processing has become an indispensable core link in the national economic processing industry due to its advantages of high precision, high efficiency, high quality and cost savings. As an important tool in stamping processing, the working principle of a stamping die is to use a press (such as a punching press) to apply pressure to materials (metals or non-metals) through the stamping die, so that the materials undergo plastic deformation or separation in the die to obtain parts or semi-finished products. The diversity of stamping dies mainly includes punching and shearing dies, bending dies, drawing dies, forming dies and compression dies, etc., which not only meet the needs of the manufacturing industry for diversified parts, but also play a crucial role in many key fields such as automobile manufacturing, aerospace, electronic appliances, and household appliance production, promoting the progress and development of the entire industrial system.

[0003] A stamping die mainly consists of an upper die and a lower die. During operation, a press (such as a punching press) is used to drive the upper die to move up and down and precisely cooperate with the lower die to complete the stamping processing of the stamping workpiece. Among them, the upper die has an upper limit position and a lower limit position during the up and down movement, that is, the highest or lowest position that the upper die can reach during the rising or falling process. The upper limit position and the lower limit position are respectively used to limit the movement stroke of the upper die to ensure the accuracy, stability and safety of the stamping process, and to ensure the forming quality and accuracy of the stamping workpiece. However, the traditional stamping die lacks the function of staying and maintaining pressure at the lower limit position during operation, which easily leads to poor forming quality and low accuracy of the stamping workpiece. Especially during the bending processing of the workpiece, since the traditional upper die completes the bending and immediately rises back to its original position at the moment when it descends to the lower limit position, it fails to give the stamping workpiece enough pressure maintaining time, resulting in the instability of the bending action and the insufficiency of the workpiece shaping effect, and easily causing the phenomenon of springback. As a result, not only the accuracy and overall quality of the stamping workpiece are reduced, but also the scrap rate and production cost are increased, and at the same time, the improvement of production efficiency is restricted. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a stamping die to solve the problem that the existing stamping die lacks the function of staying and maintaining pressure at the lower limit position, which easily leads to poor forming quality and low accuracy of the stamping workpiece.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] A stamping die includes:

[0007] A lower die assembly, the lower die assembly includes a lower die base and a female die, and the female die is installed on the lower die base;

[0008] The upper die assembly, the upper die assembly includes an upper die base and a punch, the punch is installed on the upper die base and corresponds to the die, the upper die base is movably installed on the lower die base, and the upper die base is configured to be able to drive the punch to move in a direction close to or away from the die;

[0009] A first installation cavity is formed on the upper die base, a first elastic structure is installed in the first installation cavity, one end of the punch is movably installed in the first installation cavity and is connected to the first elastic structure, and the other end extends out of the first installation cavity and corresponds to the die. The first elastic structure is configured to apply an elastic force to the punch in the direction of the die, and the magnitude of the elastic force of the first elastic structure satisfies the punching force for stamping the workpiece into shape.

[0010] According to the above technical means, the upper die base and the punch are connected by the first elastic structure, and the first elastic structure provides an elastic force to the punch in the direction of the die, so that before the upper die base drives the punch to move in the direction close to the die and reaches the lower limit position, the punch relies on this elastic force to close with the die to perform stamping processing (such as bending) on the workpiece in advance. Then, the upper die base overcomes the elastic force of the first elastic structure and drives the punch to continue to move to the lower limit position. And during this process, the punch and the die always remain in a closed state to hold the pressure on the workpiece. At the same time, during the stroke of the upper die base returning immediately after reaching the lower limit position, the first elastic structure first resets to the initial state, and then drives the punch to return. And during the reset stroke of the first elastic structure, the punch and the die still always remain in a closed state, so that the workpiece has double the dwell pressure holding time, improving the stability of stamping processing, improving the forming quality and accuracy of the workpiece, thereby improving the overall quality, reducing the scrap rate and production cost, and improving the production efficiency. Among them, the first elastic structure is installed on the upper die base through the first installation cavity, with a compact structure, convenient installation and good stability.

[0011] Furthermore, it further includes a blank holder assembly, the blank holder assembly includes a blank holder plate and a telescopic structure, the blank holder plate is located between the lower die base and the upper die base, one end of the telescopic structure is installed on the blank holder plate, and the other end is installed on the upper die base. The telescopic direction of the telescopic structure is set along the moving direction of the upper die base. A through hole is formed on the blank holder plate along the moving direction of the upper die base, and the end of the punch away from the first installation cavity can pass through the through hole to close with the die.

[0012] According to the above technical means, the pressure plate is connected to the upper die holder through a telescopic structure. During the stroke of the upper die holder driving the punch to move towards the die until it reaches the lower limit position, the pressure plate first abuts against the lower die holder, and then the telescopic structure contracts to shorten the distance between the pressure plate and the upper die holder, so that the punch passes through the through hole and closes with the die to complete the stamping process. By first pressing the workpiece on the lower die holder with the pressure plate, it is possible to prevent the workpiece from shifting during stamping, which affects the stamping effect and quality, and improves the stamping accuracy and efficiency. Among them, through the cooperation of the through hole and the punch, it not only ensures the precise guidance and positioning of the punch during the stamping process, increases the stability of the stamping process, but also protects the punch in the non-working state and extends its service life. The structure is simple and has good flexibility.

[0013] Further, the telescopic structure includes a connecting rod and a second installation cavity formed on the upper die holder. The length of the connecting rod is set along the moving direction of the upper die holder. One end of the connecting rod is movably installed in the second installation cavity, and the other end slides out of the second installation cavity and is connected to the pressure plate.

[0014] According to the above technical means, through the cooperation of the connecting rod and the second installation cavity, the flexible connection and synchronous movement between the pressure plate and the upper die holder are realized. It not only ensures the stable guidance and precise positioning of the pressure plate during work, but also enables the pressure plate to expand and contract freely according to the movement of the upper die holder, effectively improving the flexibility and working efficiency of the die, and at the same time ensuring the flatness of the workpiece and the product quality during the stamping process. Specifically, during work, before the upper die holder drives the punch to move towards the die until it reaches the lower limit position, the pressure plate first abuts against the lower die holder to position the workpiece to be stamped on the lower die holder. Then, during the stroke of the upper die holder continuing to move towards the die, it pushes the connecting rod to slide in the second installation cavity and contract in the second installation cavity, thereby shortening the distance between the pressure plate and the upper die holder, so that the punch passes through the through hole and closes with the die to stamp the workpiece. During the stroke of the upper die holder returning to its original position after the stamping process is completed, the pressure plate, under the action of its own gravity or external force, pulls the connecting rod out of the second installation cavity, thereby resetting the pressure plate. The structure is compact, the operation is convenient, and the stability is good.

[0015] Further, the telescopic structure further includes a second spring structure. The second spring structure is located in the second installation cavity. One end of the second spring structure is fixed on the inner wall of the second installation cavity, and the other end is connected to the connecting rod.

[0016] According to the above technical means, the second spring structure provides the driving force for the reset of the pressure plate, with a simple structure and convenient operation. Specifically, during operation, when the pressure plate abuts against the lower die base, within the stroke before the upper die base moves to the lower limit position, the connecting rod slides in the second installation cavity and compresses the second spring structure, causing the connecting rod to contract in the second installation cavity, shortening the distance between the pressure plate and the upper die base, enabling the punch to pass through the through hole and close with the die to perform stamping on the workpiece. During the return stroke of the upper die base after the stamping process is completed, under the action of the reset of the second spring structure, the connecting rod is driven to extend out of the second installation cavity, thereby resetting the pressure plate, and it has a compact structure, convenient operation, and good stability.

[0017] Furthermore, it further includes a guide rod, a first guide groove formed on the pressure plate, and a second guide groove formed on the lower die base. The first guide groove and the second guide groove are coaxially arranged. One end of the guide rod is fixed on the upper die base, and the other end slides through the first guide groove and is movably inserted into the second guide groove.

[0018] According to the above technical means, by the coaxial arrangement of the guide rod, the first guide groove, and the second guide groove, a more precise and stable guiding effect between the upper die base and the lower die base is achieved. During operation, within the stroke of the upper die base moving, the end of the guide rod away from the upper die base flexibly passes through the first guide groove of the pressure plate and the second guide groove of the lower die base, which not only enhances the alignment accuracy when the punch and the die are closed, but also significantly improves the smoothness and reliability of the punch operation, effectively reducing production errors caused by deviation or shaking, thereby ensuring the stability of product quality and the improvement of production efficiency.

[0019] Furthermore, it further includes a sliding sleeve and a guide post. The sliding sleeve is fixed on the upper die base. The length of the guide post is set along the moving direction of the upper die base. One end of the guide post is fixed on the lower die base, and the other end is slidably sleeved with the sliding sleeve.

[0020] According to the above technical means, through the cooperation of the sliding sleeve and the guide post, the guiding performance of the mold is further enhanced, ensuring that the punch and the die can run smoothly along the set trajectory during the opening and closing process, improving the overall load-bearing capacity and anti-impact performance, preventing deviation or shaking caused by external forces, thereby ensuring the stability of the overall operation and the accuracy of the workpiece.

[0021] Furthermore, it further includes a limiting plate. A protrusion is formed at one end of the punch located in the first installation cavity. The limiting plate is fixed on the upper die base by screws and can abut against the protrusion.

[0022] According to the above technical means, through the cooperation of the limit plate and the protrusion, the maximum stroke of the punch during stamping is limited, preventing over-punching, thus avoiding the slippage and separation of the punch from the first installation cavity, ensuring the firmness of the punch installation, and the limit plate is detachably installed on the upper die base by screws, with a simple structure, convenient disassembly and assembly of the punch, and convenient operation.

[0023] Further, a receiving groove is formed on one side of the blank holder close to the upper die base, and the receiving groove corresponds to the limit plate.

[0024] According to the above technical means, through the cooperation of the receiving groove on the blank holder and the limit plate, not only a precise positioning space is provided for the limit plate, ensuring that the limit plate can remain stable during installation and operation, not easily shaken or displaced, thus enhancing the overall stability and reliability of the die, but also making the overall structure more compact.

[0025] Further, a ejector rod is also included. The ejector rod is arranged in the first installation cavity. One end of the ejector rod is connected to the first elastic structure, and the other end is connected to the punch.

[0026] According to the above technical means, the ejector rod is slidably installed in the first installation cavity, which not only provides a guiding function for the movement of the punch, but also effectively transmits the elastic force of the first elastic structure, adjusts the position of the punch, and makes the overall structure more flexible.

[0027] Further, both the first elastic structure and the second spring structure are rectangular spiral springs.

[0028] According to the above technical means, the rectangular spiral spring has the advantages of high stiffness, high load-bearing capacity, excellent fatigue resistance, high temperature resistance, high strength, and simple structure, ensuring the stability of stamping processing, the quality and accuracy of stamped workpieces.

[0029] The beneficial effects achieved by the present utility model:

[0030] 1. In the present utility model, the upper die holder is connected to the punch through the first elastic structure. The first elastic structure provides an elastic force in the direction of the die for the punch, so that before the upper die holder reaches the lower limit position, the punch relies on this elastic force to close with the die to perform stamping processing (such as bending) on the workpiece in advance. Then, the upper die holder drives the punch to continue moving to the lower limit position by overcoming the elastic force of the first elastic structure. And during this process, the punch and the die always remain in a closed state to perform dwell pressure holding on the workpiece. At the same time, during the return stroke of the upper die holder immediately after reaching the lower limit position, the first elastic structure first resets to the initial state, and then drives the punch to return. And during the reset stroke of the first elastic structure, the punch and the die still always remain in a closed state, so that the workpiece has double dwell pressure holding time, improving the stability of stamping processing, improving the forming quality and precision of the workpiece, thereby improving the overall quality, reducing the scrap rate and production cost, and improving the production efficiency.

[0031] 2. In the present utility model, the first elastic structure is installed on the upper die holder through the first installation cavity, with a compact structure, convenient installation and good stability. Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of the stamping die of the present utility model before stamping;

[0033] Figure 2 is of the present utility model Figure 1 an enlarged view of A;

[0034] Figure 3 is a schematic structural diagram of the punch abutting against the die before the upper die holder of the present utility model reaches the lower limit position;

[0035] Figure 4 is a schematic structural diagram of the upper die holder of the present utility model reaching the lower limit position;

[0036] Figure 5 is of the present utility model Figure 4 an enlarged view of B;

[0037] Figure 6 is of the present utility model Figure 5 an enlarged view of C;

[0038] Figure 7 is a schematic structural diagram of the upper die holder returning after the stamping of the present utility model is completed.

[0039] Among them, 1 - lower die assembly; 10 - workpiece; 11 - lower die base; 111 - second guiding groove; 12 - female die; 2 - upper die assembly; 21 - upper die base; 211 - first installation cavity; 212 - second installation cavity; 22 - male die; 221 - protrusion; 3 - first elastic structure; 41 - blank holder; 411 - through hole; 412 - first guiding groove; 413 - receiving groove; 42 - telescopic structure; 421 - connecting rod; 422 - second spring structure; 5 - guiding rod; 6 - sliding sleeve; 7 - guide pillar; 8 - limiting plate; 9 - ejector rod.

[0040] The attached drawings are only for illustrative purposes and should not be construed as limiting the present patent; for better illustration of the present invention, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted; the same or similar reference numerals correspond to the same or similar components; the terms describing the positional relationship in the attached drawings are only for illustrative purposes and should not be construed as limiting the present patent. Detailed implementation manners

[0041] The following will illustrate the implementation manners of the present invention with reference to the attached drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention rather than for limiting the protection scope of the present invention.

[0042] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape and size of the components in actual implementation. The types, numbers and proportions of the components in actual implementation can be arbitrarily changed, and the layout type of the components may also be more complex.

[0043] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium.

[0044] In the embodiments of the present application, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0045] The technical solutions of the present utility model will be described in detail below with reference to specific drawings.

[0046] This embodiment relates to a stamping die, as Figure 1 and Figure 2 shown, comprising: a lower die assembly 1, the lower die assembly 1 including a lower die base 11 and a female die 12, the female die 12 being mounted on the lower die base 11; an upper die assembly 2, the upper die assembly 2 including an upper die base 21 and a male die 22, the male die 22 being mounted on the upper die base 21 and corresponding to the female die 12, the upper die base 21 being movably mounted on the lower die base 11, the upper die base 21 being configured to be able to drive the male die 22 to move in a direction approaching or away from the female die 12; a first mounting cavity 211 is formed in the upper die base 21, a first elastic structure 3 is mounted in the first mounting cavity 211, one end of the male die 22 is movably mounted in the first mounting cavity 211 and connected to the first elastic structure 3, and the other end extends out of the first mounting cavity 211 and corresponds to the female die 12, the first elastic structure 3 being configured to apply an elastic force to the male die 22 in the direction of the female die 12, and the elastic force of the first elastic structure 3 being such that the punching force for forming the workpiece 10 by the male die 22 is satisfied.

[0047] In the moving stroke of the upper die base 21 in this embodiment, there is an upper limit position when the upper die base 21 drives the male die 22 to move in a direction away from the female die 12, and there is a lower limit position when the upper die base 21 drives the male die 22 to move in a direction approaching the female die 12, and when the upper die base 21 reaches the lower limit position, the male die 22 and the female die 12 are closed, so as to perform stamping processing on the workpiece 10 to be stamped on the lower die base 11;

[0048] Specifically, a punching press is used as the power source for driving the movement of the upper die base 21, the workpiece 10 to be stamped is placed on the lower die base 11, and the stamping processing position corresponds to the female die 12; during operation, in the stroke of the punching press driving the upper die base 21 to move to the lower limit position, under the elastic force of the first elastic structure 3, the male die 22 and the female die 12 are closed, so as to perform a bending action on the workpiece 10, so that the workpiece 10 is stamped before the upper die base 21 reaches the lower limit position, and then the punching press drives the upper die base 21 to continue to move to the lower limit position, as Figure 3and Figure 4 As shown, during this process, the punch drives the upper die holder 21 to overcome the elastic force of the first elastic structure 3. While compressing the first elastic structure 3, the punch 22 and the die 12 always remain in a closed state to achieve the purpose of dwell pressure holding for the workpiece 10, extend the bending time, and improve the stability of the product. After the upper die holder 21 reaches the lower limit position, the punch immediately drives the upper die holder 21 to return, as Figure 7 shown. During the return stroke of the upper die holder 21, after the first elastic structure 3 first resets to its initial state, the upper die holder 21 then drives the bending punch and the bending die to open for return. And during the return stroke of the first elastic structure 3, the punch 22 and the die 12 still always remain in a closed state, enabling the workpiece 10 to have double dwell pressure holding time, improving the stability of stamping processing, improving the forming quality and precision of the workpiece, thereby improving the overall quality, reducing the scrap rate and production cost, and improving the production efficiency. Among them, the first elastic structure is installed on the upper die holder through the first installation cavity, with a compact structure, convenient installation, and good stability; among them, as a preferred embodiment, the first elastic structure 3 is a rectangular spiral spring, the die 12 can be a bending die, and the punch 22 can be a bending punch.

[0049] This embodiment further includes a blank holding component. The blank holding component includes a blank holding plate 41 and a telescopic structure 42. The blank holding plate 41 is located between the lower die holder 11 and the upper die holder 21. One end of the telescopic structure 42 is installed on the blank holding plate 41, and the other end is installed on the upper die holder 21. The telescopic direction of the telescopic structure 42 is set along the moving direction of the upper die holder 21. A through hole 411 is formed on the blank holding plate 41 along the moving direction of the upper die holder 21. The end of the punch 22 away from the first installation cavity 211 can pass through the through hole 411 to be closed with the die 12.

[0050] In this embodiment, as Figure 2 and Figure 3 shown, under the telescopic action of the telescopic structure 42, the blank holding plate 41 can first abut against the lower die holder 11 before the punch 22 and the die 12 are closed, thereby positioning the workpiece 10 on the die 12 to prevent the workpiece 10 from shifting during stamping, which affects the stamping effect and quality, and improves the stamping precision and efficiency. During operation, during the stroke of the punch driving the upper die holder 21 to move to the lower limit position, the blank holding plate 41 first abuts against the lower die holder 11, thereby positioning the workpiece 10 on the die 12, and then compresses the telescopic structure 42 to shorten the distance between the blank holding plate 41 and the upper die holder 21, so that the punch 22, under the elastic force of the first elastic structure 3, passes through the through hole 411 to be closed with the die 12 to perform a bending action on the workpiece 10. When stamping is completed, during the return stroke of the punch driving the upper die holder 21, the telescopic structure 42 extends, causing the blank holding plate 41 to reset.

[0051] In this embodiment, the telescopic structure 42 includes a connecting rod 421 and a second installation cavity 212 formed on the upper die base 21. The length of the connecting rod 421 is set along the moving direction of the upper die base 21. One end of the connecting rod 421 is movably installed in the second installation cavity 212, and the other end slides out of the second installation cavity 212 and is connected to the pressure plate 41.

[0052] As Figure 4 shown, in this embodiment, the telescopic rod structure is formed by the movable connection of the connecting rod 421 and the second installation cavity 212 to achieve the flexible connection and relative movement between the pressure plate 41 and the upper die base 21. Specifically, during operation, when the pressure plate 41 abuts against the lower die base 11, during the stroke of the punch driving the upper die base 21 to continue moving downward to the limit position, the connecting rod 421 is pushed into the second installation cavity 212 to shorten the distance between the pressure plate 41 and the upper die base 21. Thus, under the elastic force of the first elastic structure 3 of the punch 22, it passes through the through hole 411 and closes with the die 12 to perform a bending action on the workpiece 10. When the stamping is completed, during the stroke of the punch driving the upper die base 21 to return, the pressure plate 41, under the action of its own gravity or external force, pulls the connecting rod 421 out of the second installation cavity 212 to reset the pressure plate 41. The structure is compact, easy to operate, and has good stability.

[0053] Further, as a preferred embodiment, the telescopic structure 42 further includes a second spring structure 422. The second spring structure 422 is located in the second installation cavity 212. One end of the second spring structure 422 is fixed on the inner wall of the second installation cavity 212, and the other end is connected to the connecting rod 421; As Figure 3 and Figure 4 shown, the second spring structure 422 provides a driving force for the reset of the pressure plate 41. During specific operation, when the pressure plate 41 abuts against the lower die base 11, during the stroke of the punch driving the upper die base 21 to continue moving downward to the limit position, the connecting rod 421 is pushed into the second installation cavity 212 and compresses the second spring structure 422 to shorten the distance between the pressure plate 41 and the upper die base 21. Thus, under the elastic force of the first elastic structure 3 of the punch 22, it passes through the through hole 411 and closes with the die 12 to perform a bending action on the workpiece 10. When the stamping is completed, during the stroke of the punch driving the upper die base 21 to return, the pressure plate 41, under the action of its own gravity and the reset of the second spring structure 422, drives the connecting rod 421 out of the second installation cavity 212 to reset the pressure plate 41. The structure is compact, easy to operate, and has good stability; wherein, the second spring structure 422 is a rectangular spiral spring.

[0054] In this embodiment, it also includes a guide rod 5, a first guide groove 412 formed on the pressing plate 41, and a second guide groove 111 formed on the lower mold base 11. The first guide groove 412 and the second guide groove 111 are coaxially arranged, and one end of the guide rod 5 is fixed on the upper mold base 21, and the other end slides through the first guide groove 412 and is movably inserted into the second guide groove 111.

[0055] In this embodiment, Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, by coaxially arranging the guide rod 5, the first guide groove 412 and the second guide groove 111, a more precise and stable guiding effect is achieved between the upper die base 21 and the lower die base 11. During specific operation, during the movement of the upper die base 21, the end of the guide rod 5 away from the upper die base 21 is flexibly inserted into the first guide groove 412 of the pressure plate 41 and the second guide groove 111 of the lower die base 11, which not only enhances the alignment accuracy of the punch 22 and the die 12 during mold closing, but also significantly improves the stability and reliability of the operation of the punch 22, effectively reduces the production errors caused by deviation or shaking, thereby ensuring the stability of product quality and the improvement of production efficiency.

[0056] In this embodiment, it also includes a sliding sleeve 6 and a guide column 7. The sliding sleeve 6 is fixed on the upper mold base 21. The length of the guide column 7 is set along the moving direction of the upper mold base 21. One end of the guide column 7 is fixed on the lower mold base 11, and the other end is slidably fitted with the sliding sleeve 6.

[0057] In this embodiment, Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, through the cooperation of the sliding sleeve 6 and the guide column 7, the guiding performance of the mold is further enhanced, ensuring that the punch 22 and the die 12 can run smoothly along the set trajectory during the opening and closing process, improving the overall load-bearing capacity and impact resistance, and preventing deviation or shaking caused by external forces, thereby ensuring the stability of the overall operation and the accuracy of the workpiece.

[0058] In this embodiment, a limiting plate 8 is further included. A protrusion 221 is formed on one end of the punch 22 located in the first installation cavity 211 . The limiting plate 8 is fixed to the upper die base 21 by screws and can abut against the protrusion 221 .

[0059] like Figure 6As shown in the figure, in this embodiment, an installation opening communicating with the first installation cavity 211 is formed on the upper die base 21. During installation, one end of the punch 22 is inserted into the first installation cavity 211 through the installation opening. The structure is simple and convenient for disassembly and assembly. By installing the limit plate 8 at the position of the installation opening and abutting against the protrusion 221 on the punch 22, the maximum stroke of the punch 22 during stamping is limited, preventing over-stamping, thus avoiding the slippage and separation of the punch 22 from the first installation cavity 211, ensuring the firm installation of the punch 22, and the limit plate 8 is detachably installed on the upper die base 21 by screws, with a simple structure, convenient disassembly and assembly of the punch, and easy operation.

[0060] Further, as a preferred embodiment, a receiving groove 413 is formed on one side of the blank holder 41 close to the upper die base 21, and the receiving groove 413 corresponds to the limit plate 8; as Figure 6 shown, through the cooperation of the receiving groove 413 on the blank holder 41 and the limit plate 8, not only a precise positioning space is provided for the limit plate 8, ensuring that the limit plate 8 can remain stable during installation and operation, not easy to shake or shift, thereby enhancing the overall stability and reliability of the mold, but also making the overall structure more compact.

[0061] Further, as a preferred embodiment, a ejector rod 9 is further included. The ejector rod 9 is arranged in the first installation cavity 211. One end of the ejector rod 9 is connected to the first elastic structure 3, and the other end is connected to the punch 22; the ejector rod 9 is slidably installed in the first installation cavity 211, which not only provides a guiding function for the movement of the punch 22, but also effectively transmits the elastic force of the first elastic structure 3 to adjust the position of the punch 22, making the overall structure more flexible.

[0062] The serial numbers of the embodiments of the present application above are only for description and do not represent the advantages or disadvantages of the embodiments. The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A stamping die, characterized in that: include: A lower die assembly (1), the lower die assembly (1) comprising a lower die base (11) and a concave die (12), the concave die (12) being mounted on the lower die base (11); An upper die assembly (2), the upper die assembly (2) comprising an upper die base (21) and a punch (22), the punch (22) being mounted on the upper die base (21) and corresponding to the die (12), the upper die base (21) being movably mounted on the lower die base (11), the upper die base (21) being configured to be able to drive the punch (22) to move in a direction close to or away from the die (12); A first mounting cavity (211) is formed on the upper die seat (21), a first elastic structure (3) is installed in the first mounting cavity (211), one end of the male die (22) is movably installed in the first mounting cavity (211) and connected to the first elastic structure (3), and the other end extends out of the first mounting cavity (211) and corresponds to the female die (12), the first elastic structure (3) is configured to apply an elastic force to the male die (22) in the direction of the female die (12), and the elastic force of the first elastic structure (3) satisfies the punching force of the male die (22) to punch and form the workpiece (10).

2. A stamping die according to claim 1, characterized in that: The invention also includes a pressing assembly, which includes a pressing plate (41) and a telescopic structure (42). The pressing plate (41) is located between the lower die base (11) and the upper die base (21). One end of the telescopic structure (42) is installed on the pressing plate (41), and the other end is installed on the upper die base (21). The telescopic direction of the telescopic structure (42) is arranged along the moving direction of the upper die base (21). A through hole (411) is formed on the pressing plate (41) along the moving direction of the upper die base (21). One end of the male die (22) away from the first mounting cavity (211) can pass through the through hole (411) to close with the female die (12).

3. A stamping die according to claim 2, characterized in that: The telescopic structure (42) comprises a connecting rod (421) and a second mounting cavity (212) formed on the upper die base (21); the length of the connecting rod (421) is arranged along the moving direction of the upper die base (21); one end of the connecting rod (421) is movably mounted in the second mounting cavity (212), and the other end slides out of the second mounting cavity (212) and is connected to the pressing plate (41).

4. A stamping die according to claim 3, characterized in that: The telescopic structure (42) further comprises a second spring structure (422), wherein the second spring structure (422) is located in the second installation cavity (212), one end of the second spring structure (422) is fixed to the inner wall of the second installation cavity (212), and the other end is connected to the connecting rod (421).

5. A stamping die according to claim 2, characterized in that: It also includes a guide rod (5), a first guide groove (412) formed on the pressing plate (41), and a second guide groove (111) formed on the lower die base (11), wherein the first guide groove (412) and the second guide groove (111) are coaxially arranged, and one end of the guide rod (5) is fixed on the upper die base (21), and the other end slides through the first guide groove (412) and is movably arranged in the second guide groove (111).

6. A stamping die according to claim 1, characterized in that: It also includes a sliding sleeve (6) and a guide column (7), wherein the sliding sleeve (6) is fixed on the upper die base (21), the length of the guide column (7) is arranged along the moving direction of the upper die base (21), one end of the guide column (7) is fixed on the lower die base (11), and the other end is slidably fitted with the sliding sleeve (6).

7. A stamping die according to claim 2, characterized in that: It also includes a limiting plate (8), a protrusion (221) is formed on one end of the male mold (22) located in the first installation cavity (211), and the limiting plate (8) is fixed to the upper mold base (21) by screws and can abut against the protrusion (221).

8. A stamping die according to claim 7, characterized in that: A receiving groove (413) is formed on one side of the pressing plate (41) close to the upper die seat (21), and the receiving groove (413) corresponds to the limiting plate (8).

9. A stamping die according to claim 1, characterized in that: It also includes a push rod (9), which is inserted into the first installation cavity (211), one end of the push rod (9) is connected to the first elastic structure (3), and the other end is connected to the punch (22).

10. A stamping die according to claim 4, characterized in that: The first elastic structure (3) and the second spring structure (422) are both rectangular coil springs.

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