Punching die
By designing a stamping die with a concave punch and a convex cavity, combined with a movable upper ejector bar and a drive system, the problem of springback in stamped parts was solved, improving part accuracy and die reliability, and adapting to the deformation requirements of different materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- AVATR CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-07-07
AI Technical Summary
Due to fluctuations in the mechanical properties of materials, stamped parts may experience inconsistent material deformation during the stamping process, leading to springback and affecting the precision and dimensional accuracy of the parts.
The upper die holder punch end face of the stamping die is designed to be concave, while the bottom wall of the lower die holder cavity is convex. Combined with a movable upper ejector bar and drive system, this ensures that the part remains flat after springback, reducing demolding failure.
It effectively reduces the shape and size deviation of stamped parts, improves production accuracy, enhances the reliability and stability of molds, and adapts to the springback requirements of different materials.
Smart Images
Figure CN224463549U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of stamping die technology, and more particularly to a stamping die. Background Technology
[0002] Stamping technology is one of the fundamental processes in manufacturing, and it is widely used in automotive parts, heavy machinery, aerospace structural components and other fields.
[0003] Due to fluctuations in the mechanical properties of materials (e.g., yield strength, elongation), stamped parts are prone to inconsistent deformation behavior during the stamping process, leading to springback after forming and affecting the precision of the stamped parts. In other words, after the external pressure is removed, the dimensional and shape deviations caused by the elastic recovery of the material significantly reduce the production accuracy of the stamped parts. Utility Model Content
[0004] Therefore, this application provides a stamping die that can effectively reduce the size and shape deviation of stamped parts and improve the production accuracy of the stamping die.
[0005] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:
[0006] This application provides a stamping die, including:
[0007] The upper die holder has a punch, the end face of which is concave.
[0008] The lower die base is disposed opposite to the upper die base. The lower die base has a cavity that mates with the punch, and the bottom wall of the cavity protrudes toward the interior of the cavity.
[0009] The upper ejector rod is movably connected to the upper die base, and the upper ejector rod can protrude from the end face of the punch to eject the stamped part.
[0010] This embodiment of the application makes the bottom end face of the punch in the upper die base concave, and the bottom wall of the cavity in the lower die base that mates with the punch convex towards the cavity. Thus, during the stamping process, because the end face of the punch in the upper die base is concave and the bottom wall of the cavity in the lower die base convex towards the cavity, after the stamping die presses the part, the bottom wall of the stamped part can convex towards the cavity of the part. After the stamping die releases pressure, the part will spring back, and the bottom wall of the stamped part will deform outwards, that is, deform away from the cavity of the part, so that the bottom wall of the stamped part ultimately remains flat. This effectively reduces the shape and dimensional deviations of the stamped parts and effectively improves the production accuracy of the stamped parts. Furthermore, by providing a movable upper ejector bar in the upper die base, the upper ejector bar can eject the stamped part. This reduces or avoids the situation where the stamped part is connected to the punch and fails to demold, effectively improving the reliability and stability of the stamping die operation.
[0011] One possible implementation also includes:
[0012] The lower ejector rod is movably connected to the lower mold base and is used to adjust the protrusion size of the bottom wall of the cavity.
[0013] One possible implementation also includes:
[0014] The lower ejector insert is connected to the lower ejector rod. The lower ejector insert forms the bottom wall of the cavity, and the side of the lower ejector insert facing the inside of the cavity protrudes towards the cavity.
[0015] The lower ejector rod adjusts the protrusion size of the cavity bottom wall by moving the lower ejector rod insert.
[0016] In one possible implementation, a lower mold insert is also included, which is connected to the lower mold base and forms a sidewall of the cavity.
[0017] One possible implementation also includes:
[0018] A drive system is installed on the upper mold base and connected to the upper ejector rod. The drive system is used to drive the upper ejector rod to move relative to the upper mold base.
[0019] One possible implementation also includes:
[0020] The lower ejector connecting block has one end connected to the lower ejector insert and the other end connected to the lower ejector rod. The lower ejector rod drives the lower ejector insert to move through the lower ejector connecting block.
[0021] In one possible implementation, the drive system includes:
[0022] A drive cylinder is connected to the upper ejector rod, and the drive cylinder is used to drive the upper ejector rod to move.
[0023] In one possible implementation, the drive system further includes:
[0024] The connecting plate has multiple upper ejector rods. One end of the connecting plate is connected to the multiple upper ejector rods, and the other end is connected to the drive cylinder. The drive cylinder drives the upper ejector rods to move through the connecting plate.
[0025] In one possible implementation, the drive cylinder is a hydraulic cylinder.
[0026] In one possible implementation, the drive system further includes:
[0027] Oil storage tank;
[0028] An oil pump, one end of which is connected to the oil storage tank and the other end of which is connected to the drive cylinder, is used to deliver the drive fluid in the oil storage tank to the drive cylinder. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the structure of a stamping die provided in an embodiment of this application;
[0030] Figure 2 This is a partial structural diagram of a stamping die provided in an embodiment of this application;
[0031] Figure 3 A partially enlarged view of a stamping die provided in an embodiment of this application;
[0032] Figure 4 This is a schematic diagram illustrating the operation of a stamping die, as provided in an embodiment of this application.
[0033] Figure label:
[0034] 100 - Stamping Die;
[0035] 110 - Upper die holder; 111 - Punch; 112 - Upper ejector pin;
[0036] 120 - Lower mold base; 121 - Cavity; 122 - Lower ejector pin; 123 - Lower ejector insert; 124 - Lower mold insert; 125 - Lower ejector connecting block;
[0037] 130 - Drive system; 131 - Drive cylinder; 132 - Connecting plate; 133 - Oil reservoir; 134 - Oil pump; 135 - Oil pipe;
[0038] 140 - Stamped parts. Detailed Implementation
[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.
[0040] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.
[0041] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.
[0042] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can mean a fixed connection, a detachable connection, or an integral part; it can mean a direct connection or an indirect connection through an intermediate medium.
[0043] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0044] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.
[0045] This application provides a stamping die that can be used to manufacture stamped parts, such as automotive parts, heavy machinery, and aerospace structural components.
[0046] As described in the background section above, due to fluctuations in the mechanical properties of stamped materials (e.g., yield strength, elongation, etc.), inconsistent material deformation behavior is prone to occur during the stamping process, leading to springback after forming and affecting the precision of the stamped parts. In other words, after the external pressure is removed, the dimensional and shape deviations caused by the elastic recovery of the material significantly reduce the production precision of the stamped parts.
[0047] To address the aforementioned problems, this application provides a stamping die by making the bottom end face of the punch in the upper die base concave and the bottom wall of the cavity in the lower die base that mates with the punch convex towards the cavity. During the stamping process, because the end face of the punch in the upper die base is concave and the bottom wall of the cavity in the lower die base convex towards the cavity, after stamping the part, the bottom wall of the stamped part can convex towards the cavity of the part. Thus, after the stamping die releases pressure, the part will spring back, and the bottom wall of the stamped part will deform outwards, that is, deform away from the cavity of the part, so that the bottom wall of the stamped part ultimately remains flat. This effectively reduces the shape and dimensional deviations of the stamped parts and effectively improves the production accuracy of the stamped parts. Furthermore, by providing a movable upper ejector rod in the upper die base, the upper ejector rod can eject the stamped part. This reduces or avoids the situation where stamped parts are connected to the punch and fail to demold, thus effectively improving the reliability and stability of stamping die operation.
[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0049] Figure 1 This is a schematic diagram of the structure of a stamping die provided in an embodiment of this application. Figure 2 This is a partial structural diagram of a stamping die provided in an embodiment of this application. Figure 3 This is a partially enlarged view of a stamping die provided in an embodiment of this application.
[0050] This application provides a stamping die 100, see [link to relevant documentation] Figure 1 and Figure 2As shown, the stamping die 100 may include an upper die holder 110 and a lower die holder 120. The lower die holder 120 and the upper die holder 110 may be arranged opposite to each other, and the upper die holder 110 may have a punch 111, which, in conjunction with... Figure 3 As shown, the end face of the punch 111 can be concave. The lower die base 120 can have a cavity 121 that mates with the punch 111, and the bottom wall of the cavity 121 can protrude toward the inside of the cavity 121.
[0051] The stamping die 100 may also include an upper ejector pin 112, which is movably connected to the upper die base 110, meaning that the upper ejector pin 112 can move relative to the upper die base 110. Furthermore, the upper ejector pin 112 may protrude from the end face of the punch 111 to eject the stamped part 140.
[0052] Specifically, during the operation of the stamping die 100, because the end face of the punch 111 on the upper die holder 110 is concave, and the bottom wall of the cavity 121 of the lower die holder 120 bulges towards the cavity 121, after the stamping die 100 stamps the part, the bottom wall of the stamped part 140 can bulge towards the cavity of the part. Thus, after the stamping die 100 releases pressure, the part will spring back, and the bottom wall of the stamped part 140 will deform outwards, that is, deform away from the cavity of the part, so that the bottom wall of the stamped part 140 ultimately remains flat. This effectively reduces the shape and dimensional deviations of the stamped part 140 and effectively improves the production accuracy of the stamped part 140.
[0053] During the outward deformation of the bottom wall of the stamped part 140, the side wall of the stamped part 140 deforms towards the cavity, causing the side wall of the stamped part 140 to engage with the punch 111 of the upper die holder 110. As the upper die holder 110 moves upward and separates from the lower die holder 120, the stamped part 140 moves together with the upper die holder 110 under the cooperation between the side wall and the punch 111.
[0054] This application provides an upper ejector pin 112 in the upper die holder 110, and the upper ejector pin 112 is movable relative to the upper die holder 110 of the punch 111, so that the punch 111 can protrude from the end face of the punch 111 during the separation of the upper die holder 110 and the lower die holder 120. This allows the punch 111 to eject the stamped part 140 from the punch 111, so that the stamped part 140 can be separated from the punch 111, thereby facilitating the demolding of the stamped part 140.
[0055] This application makes the bottom end face of the punch 111 in the upper die holder 110 concave and the bottom wall of the cavity 121 in the lower die holder 120 that mates with the punch 111 convex toward the cavity 121. Thus, during the operation of the stamping die 100, because the end face of the punch 111 in the upper die holder 110 is concave and the bottom wall of the cavity 121 in the lower die holder 120 convex toward the cavity 121, after the stamping die 100 stamps the part, the bottom wall of the stamped part 140 can be made to convex toward the cavity of the part. Thus, after the stamping die 100 releases pressure, the part will spring back, and the bottom wall of the stamped part 140 will deform outwards, that is, deform away from the cavity of the part, so that the bottom wall of the stamped part 140 ultimately remains flat. This effectively reduces the shape and dimensional deviations of the stamped part 140 and effectively improves the production accuracy of the stamped part 140. Furthermore, by providing a movable upper ejector rod 112 in the upper die holder 110, the upper ejector rod 112 can eject the stamped part 140. This reduces or avoids the situation where the stamped part 140 is connected to the punch 111 and fails to demold, effectively improving the reliability and stability of the stamping die 100.
[0056] See also Figure 1 and Figure 2 As shown, the stamping die 100 may further include a lower ejector rod 122, which is movably connected to the lower die base 120. The lower ejector rod 122 can be used to adjust the protrusion size of the bottom wall of the cavity 121. For example, a lower ejector slider may also be provided in the lower die base 120, and the lower ejector rod 122 can be connected to the lower ejector slider. The lower ejector slider can drive the lower ejector rod 122 to move up and down, so that the lower ejector rod 122 can move relative to the lower die base 120.
[0057] Different stamping materials have different springback amounts. Therefore, in forming the stamped part 140, it is necessary to enable the stamped part 140 to achieve different deformation amounts to meet the preparation requirements of materials with different springback amounts. The size of the protrusion on the bottom wall of the cavity 121 can be adjusted by moving the lower ejector rod 122 to adjust the deformation amount at the bottom of the stamped part 140. This allows the stamping die 100 to meet the springback requirements of different stamping materials, effectively improving the flexibility and adjustability of the stamping die 100, thereby effectively improving the overall performance of the stamping die 100.
[0058] See Figure 2 and Figure 3As shown, the stamping die 100 may further include a lower ejector insert 123, which can be connected to the lower ejector rod 122. The lower ejector insert 123 can form the bottom wall of the cavity 121. Furthermore, the side of the lower ejector insert 123 facing the inside of the cavity 121 can protrude towards the cavity 121, so that the bottom wall of the cavity 121 protrudes towards the inside of the cavity 121 (i.e., towards the punch 111). The lower ejector rod 122 can adjust the protrusion size of the bottom wall of the cavity 121 by moving the lower ejector insert 123.
[0059] By driving the lower ejector rod 122 to the lower ejector insert 123, the lower ejector insert 123 can achieve different heights, so that the lower ejector insert 123 can achieve different height protrusions for the bottom wall of the cavity 121, which can effectively meet the deformation requirements of materials with different springback amounts and effectively improve the production accuracy of the stamping die 100.
[0060] See also Figure 2 and Figure 3 As shown, the stamping die 100 may further include a lower die insert 124, which can be connected to the lower die base 120 and can form the sidewall of the cavity 121. For example, the lower die insert 124 and the lower die base 120 can be fixedly connected, and a through cavity is provided on the lower die insert 124. The lower ejector insert 123 can be located at the bottom of the through cavity, so that the lower ejector insert 123 and the through cavity can together form the cavity 121 of the lower die base 120.
[0061] Among them, the lower ejector insert 123 is movable relative to the lower die insert 124. In this way, the protrusion size at the bottom of the cavity 121 can be adjusted during the movement of the lower die insert 124, so that the protrusion size at the bottom of the cavity 121 can meet the deformation requirements of materials with different springback amounts, thereby effectively improving the production accuracy of the stamping die 100.
[0062] See also Figure 2 As shown, the stamping die 100 may also include a lower ejector connecting block 125. One end of the lower ejector connecting block 125 may be connected to the lower ejector insert 123, and the other end may be connected to the lower ejector rod 122. The lower ejector rod 122 can drive the lower ejector insert 123 to move through the lower ejector connecting block 125.
[0063] The materials of the lower ejector connecting block 125 and the lower ejector insert 123 can be different. For example, the hardness of the material of the lower ejector insert 123 can be greater than that of the lower ejector connecting block 125. This can reduce the wear of the lower ejector insert 123 during long-term repeated contact with the stamping material, thereby affecting the normal operation of the stamping die 100 and helping to improve the reliability and stability of the stamping die 100.
[0064] Moreover, the cost varies depending on the hardness of the material. Materials with higher hardness have a relatively higher cost. By using materials with different hardness for the lower ejector insert 123 and the lower ejector connecting block 125, the material cost of the stamping die 100 can be reduced.
[0065] See Figure 1 As shown, the stamping die 100 may also include a drive system 130, which may be mounted on the upper die base 110 and connected to the upper ejector rod 112. The drive system 130 may be used to drive the upper ejector rod 112 to move relative to the upper die base 110.
[0066] For example, during mold opening, the upper mold base 110 moves upward, which can drive the punch 111 and the upper ejector pin 112 to move upward together with the upper mold base 110. At this time, the side wall of the stamped part 140 is fastened to the punch 111, so that the stamped part 140 also moves upward with the punch 111. After moving upward a certain distance, the drive system 130 can drive the upper ejector pin 112 to move, so that the upper ejector pin 112 protrudes from the end face of the punch 111 to eject the stamped part 140, so that the stamped part 140 falls off the punch 111 to complete the demolding.
[0067] The drive system 130 can provide power by moving the upper ejector bar 112, so that the upper ejector bar 112 can extend to the end face of the punch 111 when needed to eject the stamped part 140. This can effectively reduce or avoid the situation where the stamped part 140 fails to demold due to the connection between the stamped part 140 and the punch 111, and can effectively improve the reliability and stability of the demolding of the stamped part 140.
[0068] Moreover, compared to using the original drive device in the stamping die 100, this application can facilitate the control or operation of the movement of the upper ejector rod 112 by separately setting the drive system 130 or above, simplifying the overall control program of the stamping die 100, reducing the operation difficulty of the stamping die 100, and helping to improve the reliability and stability of the movement of the upper ejector rod 112.
[0069] Referring again to the figure, the drive system 130 may include a drive cylinder 131, which may be connected to the upper ejector rod 112. The drive cylinder 131 can drive the upper ejector rod 112 to move. The drive cylinder 131 can provide driving force to the upper ejector rod 112, so that the upper ejector rod 112 can move according to a preset stroke to eject the stamped part 140, thereby separating the stamped part 140 from the punch 111, which can effectively improve the reliability and stability of the operation of the upper ejector rod 112.
[0070] See also Figure 1As shown, the drive system 130 may further include a connecting plate 132, and the number of upper ejector rods 112 may be multiple. One end of the connecting plate 132 may be connected to multiple upper ejector rods 112. For example, multiple upper ejector rods 112 may be evenly distributed on the connecting plate 132 and connected to the connecting plate 132. The other end of the connecting plate 132 may be connected to a drive cylinder 131, and the drive cylinder 131 may drive the upper ejector rods 112 to move through the connecting plate 132.
[0071] The drive cylinder 131 can drive the connecting plate 132 to move, so that the connecting plate 132 can drive the upper ejector rods 112 to move together. In this way, multiple upper ejector rods 112 can be moved by one or two drive cylinders 131, which can effectively improve the driving efficiency of the drive cylinder 131. Moreover, the movement of the upper ejector rods 112 driven by the connecting plate 132 also helps to improve the synchronicity and consistency of the movement of multiple upper ejector rods 112, thereby effectively improving the demolding effect of the stamped part 140.
[0072] See also Figure 1 As shown, the drive system 130 can be a hydraulic system, and the drive cylinder 131 can be a hydraulic cylinder. Hydraulic drive can provide greater power, allowing the upper ejector rod 112 to apply a larger ejection force to the stamped part 140, enabling the stamped part 140 to separate from the punch 111. This effectively reduces or avoids the failure of the stamped part 140 to separate from the punch 111, and effectively improves the reliability and stability of the stamping die 100.
[0073] See also Figure 1 As shown, the stamping die 100 may also include an oil tank, an oil pump 134, and an oil pipe 135. The oil tank may contain a driving fluid, for example, hydraulic oil. One end of the oil pump 134 may be connected to an oil reservoir 133, and the other end may be connected to a drive cylinder 131. The oil pump 134 may be used to deliver the driving fluid in the oil reservoir 133 to the drive cylinder 131, so that the drive cylinder 131 can drive the upper ejector rod 112 to move, thereby ejecting the stamped part 140.
[0074] The working process of the stamping die 100 provided in the embodiments of this application will be described below with reference to the accompanying drawings.
[0075] Figure 4 This is a schematic diagram illustrating the operation of a stamping die, as provided in an embodiment of this application.
[0076] See Figure 4 As shown, the stamping die 100 provided in this application embodiment can be manufactured according to the following process.
[0077] S101: Stamping die 100 starts working.
[0078] S102: Part mounting.
[0079] At this time, the upper mold base 110 and the lower mold base 120 are separated, and the part can be placed on the lower mold base 120.
[0080] S103: The main hydraulic cylinder has been pressed down to the desired position.
[0081] The main hydraulic cylinder is a drive cylinder 131 used to drive the upper mold base 110 to move up and down, thereby opening and closing the mold. After the part is placed on the lower mold base 120, the main hydraulic cylinder can move down to drive the upper mold base 110 to move downward and close with the lower mold base 120, thereby stamping the part.
[0082] S104: The lower ejector slider moves the ejector upward.
[0083] The lower ejector slide is located on the lower die holder 120. When the lower ejector slide moves upward, it can drive the lower ejector rod 122 and the lower ejector insert 123 to move upward together, so that the protrusion on the lower ejector insert 123 can squeeze the bottom of the stamped part 140, so that the bottom of the stamped part 140 can be concave inward to counteract the springback deformation of the stamped part 140.
[0084] S105: Lower ejector slider reset.
[0085] After the stamping of the part is completed, the lower ejector slide can move down to reset, and drive the lower ejector rod 122 and the lower ejector insert 123 to move down to reset together.
[0086] S106: The main hydraulic cylinder moves upward.
[0087] After the part is stamped, the main hydraulic cylinder moves upward, which can drive the upper mold base 110 to move together to open the mold.
[0088] S107: Drive cylinder 131 drives upper ejector rod 112 to move, so as to eject stamped part 140.
[0089] After the main cylinder moves up a certain distance, for example, 50mm, the drive cylinder 131 can drive the upper ejector rod 112 to move down so that it protrudes from the bottom of the punch 111, thereby ejecting the stamped part 140 from the punch 111 and separating the stamped part 140 from the punch 111, so as to achieve the demolding of the stamped part 140.
[0090] S108: Main cylinder reset.
[0091] After the stamped part 140 is demolded, the main hydraulic cylinder continues to move upward until it is reset.
[0092] S109: Drive cylinder 131 reset.
[0093] After the main cylinder is reset, the drive cylinder 131 moves upward to complete the reset.
[0094] The above steps can complete the production of one cycle of stamped part 140, and the produced part can become a standard part after springback, which can effectively improve the production accuracy of stamped part 140.
[0095] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. A stamping die, characterized in that, include: The upper mold base (110) has a punch (111) with the end face of the punch (111) being concave. The lower mold base (120) is disposed opposite to the upper mold base (110). The lower mold base (120) has a cavity (121) that mates with the punch (111). The bottom wall of the cavity (121) protrudes toward the interior of the cavity (121). The upper ejector rod (112) is movably connected to the upper die base (110), and the upper ejector rod (112) can protrude from the end face of the punch (111) to eject the stamped part (140).
2. The stamping die according to claim 1, characterized in that, Also includes: The lower ejector rod (122) is movably connected to the lower mold base (120) and is used to adjust the protrusion size of the bottom wall of the cavity (121).
3. The stamping die according to claim 2, characterized in that, Also includes: The lower ejector insert (123) is connected to the lower ejector rod (122). The lower ejector insert (123) forms the bottom wall of the cavity (121), and the side of the lower ejector insert (123) facing the inside of the cavity (121) protrudes towards the cavity (121). The lower ejector rod (122) adjusts the protrusion size of the bottom wall of the cavity (121) by moving the insert of the lower ejector rod (122).
4. The stamping die according to claim 3, characterized in that, It also includes a lower mold insert (124), which is connected to the lower mold base (120) and forms the sidewall of the cavity (121).
5. The stamping die according to any one of claims 1 to 3, characterized in that, Also includes: A drive system (130) is installed on the upper mold base (110) and connected to the upper ejector rod (112). The drive system (130) is used to drive the upper ejector rod (112) to move relative to the upper mold base (110).
6. The stamping die according to claim 4, characterized in that, Also includes: The lower top material connecting block (125) is connected at one end to the lower top material insert (123) and at the other end to the lower top material rod (122). The lower top material rod (122) drives the lower top material insert (123) to move through the lower top material connecting block (125).
7. The stamping die according to claim 5, characterized in that, The drive system (130) includes: A drive cylinder (131) is connected to the upper ejector rod (112) and is used to drive the upper ejector rod (112) to move.
8. The stamping die according to claim 7, characterized in that, The drive system (130) also includes: The connecting plate (132) has multiple upper push rods (112). One end of the connecting plate (132) is connected to multiple upper push rods (112), and the other end is connected to the drive cylinder (131). The drive cylinder (131) drives the upper push rods (112) to move through the connecting plate (132).
9. The stamping die according to claim 7, characterized in that, The drive cylinder (131) is a hydraulic cylinder.
10. The stamping die according to claim 9, characterized in that, The drive system (130) also includes: Oil storage tank (133); An oil pump (134) is provided, one end of which is connected to the oil storage tank (133) and the other end of which is connected to the drive cylinder (131). The oil pump (134) is used to transport the drive fluid in the oil storage tank (133) to the drive cylinder (131).