Punching die and stamping equipment

Abstract

The utility model relates to a punching die and stamping equipment, which belongs to the technical field of stamping dies, and comprises an upper die assembly and a lower die, the upper die assembly comprises an upper die and a stamping needle which are matched with the lower die, the lower die is provided with a stamping hole array, and the stamping hole array comprises a plurality of stamping holes which are arranged in an array; the upper die is provided with a positioning hole array, the positioning hole array comprises a plurality of positioning holes arranged in an array, and internal threads are formed in the positioning holes; the upper die is arranged on the lower die in a vertically liftable manner, and the positioning holes correspond to the stamping holes respectively; the punching needle is provided with an external thread matched with the internal thread, and the punching needle is detachably connected to the positioning hole through matching of the external thread and the internal thread. According to the punching die, the punching needles can be arranged or adjusted according to the actual pattern requirements, so that one set of punching die can meet the punching requirements of different customers and different patterns, the use is simple and convenient, the universality is very good, and the subsequent maintenance and replacement cost can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, specifically to a punching die and stamping equipment. Background Technology

[0002] Perforation is a process that uses specific tools or equipment to create holes of predetermined shapes, sizes, and arrangements on fabric, thereby forming decorative, functional, or artistic patterns. It is widely used in automotive interiors and leather products.

[0003] Die stamping is a common and effective means of achieving punching. Existing die stamping processes usually require metal dies and stamping equipment (or presses). Existing metal dies are usually equipped with punches for punching. The punches are arranged in the required pattern. During punching, the punches face the fabric, and the metal die moves toward the fabric under the drive of the stamping equipment, so that the punches can be used to punch out a pattern on the fabric that matches the pattern of the punches.

[0004] However, in existing metal molds, punches are usually fixed to the metal mold, and a set of metal molds has only one pattern for the punches. When it is necessary to change the pattern of the punching hole, the entire metal mold must be replaced, which is costly and has poor versatility, and urgently needs to be solved. Summary of the Invention

[0005] The first aspect of this utility model is to solve the above-mentioned technical problems by providing a punching die. The punches can be arranged or adjusted according to the actual pattern requirements, so that one set of punching die can meet the punching needs of different customers and different patterns. It is not only simple and convenient to use, but also has excellent versatility, which can effectively reduce the cost of subsequent maintenance and replacement.

[0006] A punching die includes an upper die assembly and a lower die for supporting fabric. The upper die assembly includes an upper die adapted to the lower die and a punch. The lower die has an array of punching holes, which includes a plurality of punching holes arranged in an array. The upper die has an array of positioning holes, which includes a plurality of positioning holes arranged in an array, and the positioning holes have internal threads. The upper die is vertically and vertically mounted on the lower die, and each positioning hole corresponds to a punching hole. The punch has an external thread adapted to the internal thread, and the punch is detachably connected to the positioning hole through the engagement of the external thread and the internal thread, with the lower end of the punch corresponding to the punching hole. In this solution, a lower die is configured with a punching hole array, comprising multiple punching holes arranged in an array. These punching holes effectively support and constrain the punch during the punching process, preventing bending or breakage. An upper die is configured with a positioning hole array, comprising multiple positioning holes arranged in an array, each corresponding to a punching hole. On one hand, the positioning holes support and constrain the punch, preventing bending or breakage. On the other hand, they also position and guide the punch, ensuring a one-to-one correspondence between the punch and the punching holes below, thus guaranteeing the accuracy and aesthetics of the stamped pattern. The die features an array of positioning holes with internal threads within them. Simultaneously, the punch has external threads adapted to these internal threads, allowing for detachable connection between the punch and the positioning holes via the engagement of the external and internal threads. In practical use, the user can arrange or adjust the punch positions according to the desired pattern, ensuring that the punches in the stamping position form the required pattern. This allows a single punching die to meet the punching needs of different customers and for various patterns. It is not only simple and convenient to use but also highly versatile, eliminating the need to purchase custom dies for different patterns, thus effectively reducing subsequent maintenance and replacement costs.

[0007] To address the issue of ensuring the upper die can move vertically relative to the lower die, the lower die is further provided with a first guide portion, and the upper die is provided with a second guide portion adapted to the first guide portion. The first and second guide portions form a vertical sliding pair. This allows the lower and upper dies to form a vertical sliding pair through the cooperation of the first and second guide portions, ensuring that the upper die can only move vertically relative to the lower die and cannot translate or rotate relative to it. This ensures that each positioning hole and each punching hole always correspond one-to-one and are coaxial, which helps to guarantee and improve the punching accuracy.

[0008] Preferably, the first guide portion includes at least two guide posts arranged vertically, which are disposed on the lower mold; the second guide portion includes at least two guide holes adapted to each guide post, which are disposed on the upper mold and extend through the upper and lower ends of the upper mold, and the upper mold is sleeved on the guide posts through the guide holes. This allows the upper mold to form a vertically moving pair with the lower mold through the cooperation of the guide holes and guide posts, ensuring that the upper mold can only move vertically relative to the lower mold.

[0009] The second aspect of this invention addresses the problem of more conveniently meeting the punching needs of different customers and different patterns. In some preferred solutions, the length of the punch is greater than the distance between the lower end of the positioning hole and the internal thread. When the punch is threaded into the positioning hole, the lower end of the punch protrudes from the lower surface of the upper die. In this solution, the user only needs to install the punch at the corresponding position in the positioning hole array according to the actual pattern requirements. Due to the size, the installed punches are all in the punching position, and the installed punches together form the required pattern, thus more conveniently meeting the punching needs of different customers and different patterns. It is very simple and efficient to use.

[0010] The second aspect of this invention addresses the problem of more conveniently meeting the punching needs of different customers and different patterns. In some preferred solutions, the length of the punch is less than the depth of the positioning hole in the vertical direction, and the length of the external thread in the punch is less than the length of the internal thread in the positioning hole. The punch is threaded into the positioning hole, and the position of the lower end of the punch can be adjusted by rotating the punch, so that the lower end of the punch is either retracted into the positioning hole or extends out of the positioning hole. This allows the lower end of the punch to contact the fabric during the subsequent punching process and, after passing through the fabric, to insert into the corresponding punching hole, thus successfully completing the punching purpose on the fabric. In use, the user only needs to adjust the punch to the punching position at the corresponding position in the positioning hole array according to the actual pattern requirements. All the punches in the punching position together form the required pattern, thus more conveniently meeting the punching needs of different customers and different patterns. It is very simple and efficient to use.

[0011] Preferably, the positioning hole includes an internally threaded section at the top and a smooth hole section at the bottom, with the internally threaded section communicating with the smooth hole section. The punch includes an externally threaded section and a smooth rod section connected to the externally threaded section. The outer diameter of the externally threaded section is larger than the outer diameter of the smooth rod section, and the end of the externally threaded section has a torsion portion. The externally threaded section is threadedly connected to the internally threaded section, and the smooth rod section is inserted into the smooth hole section. In this design, the externally threaded section and the internally threaded section form a threaded connection, and the smooth hole section and the smooth rod section form a guiding fit. This allows the smooth hole section to guide the movement of the punch, ensuring that the punch moves strictly vertically to achieve precise punching. Furthermore, the smooth hole section can limit and support the punch along its circumference, preventing bending or even breakage during the punching process, thus improving the reliability and service life of the punch.

[0012] Preferably, at least the inner diameter of the lower end of the positioning hole is the same as the inner diameter of the stamping hole. This is more conducive to their mutual fit.

[0013] The third aspect of this utility model addresses the problems of reducing processing difficulty, improving reliability, and reducing costs. Further, the upper mold includes a stabilizing mold and an adjusting mold. The stabilizing mold has an array of stabilizing holes, each array comprising multiple stabilizing holes arranged in an array, penetrating the upper and lower ends of the stabilizing mold. The adjusting mold has an array of adjusting holes, each array comprising multiple adjusting holes arranged in an array, penetrating the upper and lower ends of the adjusting mold, and each adjusting hole has an internal thread adapted to a punch. The adjusting mold is detachably mounted on the stabilizing mold, with each adjusting hole corresponding to a stabilizing hole, and each stabilizing hole corresponding to a punching hole. The stabilizing holes and their corresponding adjusting holes constitute the positioning holes. In this solution, by configuring the upper mold as a combination of a stabilizing mold and an adjusting mold, the stabilizing mold and the adjusting mold can be processed separately, and the stabilizing mold and the adjusting mold can be made of different materials. This improves the reliability of the upper mold while effectively reducing processing difficulty and lowering costs.

[0014] The fourth aspect of this utility model addresses the issues of further improving reliability and reducing costs. Specifically, the hardness of the stabilizing die is greater than that of the adjusting die. In this solution, by configuring the hardness of the stabilizing die to be greater than that of the adjusting die, the punching die has higher hardness, making it less prone to cracking during stamping and impact. This effectively improves the reliability and service life of the stabilizing die, especially for large-sized stabilizing dies (e.g., stabilizing dies exceeding 1 meter in length). Simultaneously, the relatively lower hardness of the adjusting die not only facilitates the machining of internal threads, significantly reducing machining difficulty, but also greatly reduces the cost of the adjusting die. Furthermore, the adjusting die is detachably mounted on the stabilizing die; if the adjusting die is damaged, it can be disassembled and replaced separately, resulting in significantly reduced maintenance costs.

[0015] Preferably, the stabilizing mold is made of high-strength alloy steel plate, high-hardness stainless steel plate, high-temperature alloy plate, or hard alloy plate; the adjusting mold is made of low-carbon steel plate, free-cutting steel plate, or aluminum alloy plate.

[0016] Preferably, the upper surface of the lower die is flat to support the fabric; the lower surface of the upper die is also flat. This allows the fabric to be clamped flat using the upper and lower surfaces of the lower and upper dies, preventing the fabric from twisting or deforming during punching. This improves punching accuracy and results in a more aesthetically pleasing punched pattern.

[0017] Preferably, the lower mold adopts a cuboid structure; the upper mold adopts a cuboid structure.

[0018] Preferably, the upper end of the punching hole penetrates the upper surface of the lower die, and the lower end of the punching hole penetrates the lower surface of the lower die. This allows air to escape from the lower end of the lower die during the punching process, preventing air blockage and facilitating a smoother and more efficient punching operation.

[0019] Preferably, the upper and lower ends of the positioning hole pass through the upper and lower ends of the upper mold, respectively.

[0020] Preferably, the spacing between two adjacent positioning holes is equal.

[0021] Furthermore, the lower die is also provided with a mounting part; the upper die is also provided with a connecting part for connecting the stamping head in the stamping equipment.

[0022] The fifth aspect of this utility model addresses the problem that during the punching process, the punch pin easily rotates, causing its position to change and affecting the punching effect or even leading to punching failure. Furthermore, the upper die assembly includes a locking member with an external thread adapted to the internal thread. The locking member is threadedly connected to the positioning hole and abuts against the lower punch pin. This achieves the purpose of tightening the punch pin, effectively preventing it from rotating during punching and preventing it from dislodging from the adjustment hole. This not only ensures the punching effect but also makes the entire punching die more stable and reliable.

[0023] Preferably, the setter is an internal hexagon set screw.

[0024] A stamping device includes a stamping device body and a punching die, wherein the punching die is disposed on the stamping device body.

[0025] Furthermore, the stamping equipment body includes a stamping platform, a stamping power source, and a stamping head. The stamping head is mounted on the stamping platform, and the stamping power source is connected to the stamping head for driving the stamping head to move vertically up and down relative to the stamping platform. The lower die in the punching mold is fixed to the stamping platform, and the upper die in the punching mold is fixedly connected to the stamping head. This allows the upper die to move vertically up and down relative to the lower die under the drive of the stamping head, thereby achieving the purpose of punching.

[0026] Compared with the prior art, the punching die and stamping equipment provided by this utility model can arrange or adjust the punches according to the actual pattern requirements, so that a set of punching dies can meet the punching needs of different customers and different patterns. It is not only simple and convenient to use, but also has excellent versatility and can effectively reduce the cost of subsequent maintenance and replacement. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a lower die in a punching die provided in Embodiment 1 of this utility model.

[0029] Figure 2 This is a schematic diagram of the structure of an upper die in a punching die provided in Embodiment 1 of this utility model.

[0030] Figure 3 for Figure 2 A sectional view.

[0031] Figure 4 for Figure 3 A magnified view of a portion of point I in the middle.

[0032] Figure 5 This is a schematic diagram of the structure of a punch in a punching die provided in Embodiment 1 of this utility model.

[0033] Figure 6 This is a partial cross-sectional view of the punch in the initial position of a punching die provided in Embodiment 1 of this utility model.

[0034] Figure 7 This is a partial cross-sectional view of a punching die provided in Embodiment 1 of this utility model, showing the punch in the punching position.

[0035] Figure 8It is a schematic structural diagram after arranging the character "中" with punch pins in the upper die.

[0036] Figure 9 It is a schematic diagram when punching holes in the fabric using a punching die provided in Embodiment 1 of the utility model.

[0037] Figure 10 It is Figure 9 the left view of.

[0038] Figure 11 It is a partial cross-sectional view after the punch pin is installed in the positioning hole in a punching die provided in Embodiment 2 of the present utility model.

[0039] Figure 12 It is a schematic structural diagram of a stabilizing die in a punching die provided in Embodiment 3 of the present utility model.

[0040] Figure 13 It is a schematic structural diagram of an adjusting die in a punching die provided in Embodiment 3 of the present utility model.

[0041] Figure 14 It is a schematic diagram when punching holes in the fabric using a punching die provided in Embodiment 3 of the utility model.

[0042] Figure 15 It is a cross-sectional view of the upper die in a punching die provided in Embodiment 3 of the present utility model.

[0043] Figure 16 It is Figure 15 One of the partial enlarged schematic diagrams at II in, where the punch pin is at the stamping position.

[0044] Figure 17 It is Figure 15 Two of the partial enlarged schematic diagrams at II in, where the punch pin is at the initial position.

[0045] Figure 18 It is a schematic structural diagram of a fastening piece in a punching die provided in Embodiment 4 of the present utility model.

[0046] Figure 19 It is a partial cross-sectional view after the punch pin is installed in the positioning hole and tightened by the fastening piece in a punching die provided in Embodiment 4 of the present utility model.

[0047] The markings in the diagram are as follows: Lower die 1, Upper surface 11, Punching hole array 12, Punching hole 13, Guide post 14; Upper die 2, Lower surface 21, Positioning hole array 22, Positioning hole 23, Internal thread section 24, Smooth hole section 25, Internal thread 26, Guide hole 27, Connecting part 28; Punch 3, External thread section 31, Smooth rod section 32, External thread 33, Torsion part 34; Stabilizing die 4, Stabilizing hole array 41, Stabilizing hole 42; Adjusting die 5, Adjusting hole array 51, Adjusting hole 52; Fastening part 6, Internal hexagon 61; Fabric 7. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0049] Example 1

[0050] This embodiment provides a punching die, including a lower die 1 and an upper die assembly. The upper die assembly includes an upper die 2 and a punch 3, wherein, as shown... Figure 1 As shown, the lower die 1 is mainly used to support the fabric 7 that needs to be punched. In implementation, the upper surface 11 of the lower die 1 can preferably be constructed as a flat surface to lay the fabric 7 flat, making it easier to accurately punch holes in the fabric 7 to form the required pattern. Correspondingly, the lower surface 21 of the upper die 2 is constructed to fit the upper surface 11 of the lower die 1. During the punching process, the upper surface 11 of the lower die 1 and the lower surface 21 of the upper die 2 can be used to clamp the fabric 7 flat, preventing the fabric 7 from twisting or deforming during the punching process. This not only helps to improve the punching accuracy but also makes the punched pattern more aesthetically pleasing. It can be understood that in implementation, the upper surface 11 of the lower die 1 only needs to fit the lower surface 21 of the upper die 2. Therefore, in implementation, when the upper surface 11 of the lower die 1 is constructed as a curved surface, the lower surface 21 of the upper die 2 is also constructed as a curved surface to fit it.

[0051] During implementation, the shape of the lower mold 1 can be determined according to actual needs. For example, such as... Figure 1 and Figure 9As shown, in this embodiment, the lower mold 1 adopts a cuboid structure; of course, in other embodiments, the lower mold 1 can also be constructed as a circle, ellipse, triangle, or irregular shape, etc. In implementation, the lower surface 21 of the lower mold 1 can preferably be constructed as a plane to ensure that the lower mold 1 can be smoothly lowered.

[0052] In implementation, the lower die 1 is constructed with a punching hole array 12, such as Figure 1 As shown, the punching hole array 12 includes multiple punching holes 13 arranged in an array. The punching holes 13 are used to accommodate the pressed-down punch 3, and can also limit and constrain the lower end of the punch 3 or provide auxiliary guidance to the lower end of the punch 3, ensuring that the punch 3 remains vertical during the punching process and preventing bending and deformation. In implementation, the number of punching holes 13 can be determined according to actual needs, and the shape formed by the punching hole array 12 can also be determined according to actual needs. For example, the punching hole array 12 can be formed into rectangular, circular, or elliptical shapes, such as... Figure 1 As shown, in this embodiment, the punching hole array 12 forms a rectangle to meet the punching requirements of larger fabric 7 and larger patterns. For example, in some cases, the length of the lower die 1 is greater than 1 meter, for example, 1.8 meters; correspondingly, the length of the rectangle formed by the punching hole array 12 can also be greater than 1 meter.

[0053] In practice, the upper end of the punching hole 13 penetrates the upper surface 11 of the lower die 1, and the lower end of the punching hole 13 may not penetrate the lower surface 21 of the lower die 1. However, in the preferred embodiment, the lower end of the punching hole 13 penetrates the lower surface 21 of the lower die 1 so that air can be vented from the lower end of the lower die 1 during the punching process, avoiding the situation of air blockage, which is more conducive to completing the punching work smoothly and efficiently.

[0054] In practice, the spacing between two adjacent punching holes 13 in the punching hole array 12 can be equal, such as Figure 1 As shown, it makes it easier to arrange the patterns that need to be stamped.

[0055] In implementation, the shape of the upper mold 2 can be determined according to actual needs. The shape of the upper mold 2 should preferably be adapted to the shape of the lower mold 1. For example, Figure 2 and Figure 3 As shown, in this embodiment, the upper mold 2 adopts a cuboid structure; of course, in other embodiments, the upper mold 2 can also be constructed as a circle, ellipse, triangle, or irregular shape, etc. In this embodiment, the upper mold 2 preferably adopts an existing one-piece molded component, which is beneficial to improving the service life of the upper mold 2.

[0056] In this embodiment, the upper mold 2 is constructed with a positioning hole array 22, such as Figure 2 and Figure 3As shown, the positioning hole array 22 includes multiple positioning holes 23 arranged in an array. In implementation, the upper and lower ends of the positioning holes 23 penetrate the upper and lower ends of the upper mold 2, respectively. Figure 2 and Figure 3 As shown. In implementation, the number of positioning holes 23 can be determined according to actual needs, and the shape formed by the positioning hole array 22 can also be determined according to actual needs. For example, the positioning hole array 22 can be formed into a rectangular, circular, or elliptical shape. In a preferred embodiment, the shape of the positioning hole array 22 is the same as the shape of the stamping hole array 12 so that they can cooperate with each other. As an example, such as Figure 2 As shown, in this embodiment, the positioning hole array 22 is rectangular, such that the shape of the positioning hole array 22 is the same as the shape of the stamping hole array 12, so that they can fit together. In implementation, the spacing between two adjacent positioning holes 23 in the positioning hole array 22 can be equal, such as... Figure 2 As shown, this makes it easier to arrange the patterns that need to be stamped. During implementation, each positioning hole 23 corresponds one-to-one with each stamping hole 13 below, as shown... Figure 9 and Figure 10 As shown, this allows the punch 3 extending from the lower end of the positioning hole 23 to be inserted into the corresponding punching hole 13, thus achieving the purpose of punching.

[0057] In implementation, the shapes of the punching hole 13, the positioning hole 23, and the punch 3 are matched to ensure mutual cooperation. For example, in this embodiment, the punch 3 is a cylindrical rod, such as... Figure 5 As shown, the positioning hole 23 is constructed as a round hole to fit the punch 3, as... Figure 3 As shown, the punching hole 13 is also constructed as a round hole adapted to fit the punch 3, such as... Figure 1 As shown, this allows the punch 3 to be smoothly inserted into the punching hole 13 through the positioning hole 23 during the punching process, thereby achieving the purpose of punching.

[0058] In this embodiment, the positioning hole 23 is provided with an internal thread 26, such as... Figure 3 and Figure 4 As shown, the punch 3 is constructed as a rod-shaped structure adapted to the positioning hole 23. Simultaneously, the punch 3 has an external thread 33 adapted to the internal thread 26. The length of the external thread 33 on the punch 3 is less than the length of the internal thread 26 inside the positioning hole 23. The punch 3 is threadedly connected to the positioning hole 23, and the position of the lower end of the punch 3 can be adjusted by rotating it, allowing the lower end of the punch 3 to be retracted into the positioning hole 23 or extended below it. Specifically, in actual use, when a particular punch 3 is not needed, its position can be adjusted upwards by rotation, so that the lower end of the punch 3 is retracted into the positioning hole 23, that is, the lower end of the punch 3 is adjusted to be above the lower surface 21 of the upper mold 2. For ease of description, this position of the punch 3 can be referred to as the initial position. Figure 6As shown, keeping the punch 3 in its initial position effectively prevents damage to the fabric 7 during the stamping process. Therefore, in a preferred embodiment, the length of the punch 3 is less than the vertical depth of the positioning hole 23, so that after the lower end of the punch 3 is housed in the positioning hole 23, the upper end of the punch 3 can also be located within the positioning hole 23, preventing it from protruding from the upper die 2 and preventing the stamping head of the stamping equipment from damaging the punch 3. It also prevents the punch 3 from interfering with the stamping head of the stamping equipment. When a particular punch 3 is needed, its position can be adjusted downwards by rotation, so that the lower end of the punch 3 extends below the positioning hole 23, that is, the lower end of the punch 3 is adjusted to be below the lower surface 21 of the upper die 2. For ease of description, the position of the punch 3 at this time can be called the stamping position, such as... Figure 7 As shown, this allows the lower end of the punch 3 to contact the fabric 7 during the subsequent punching process, and after passing through the fabric 7, it can be inserted into the corresponding punching hole 13, thus successfully completing the purpose of punching holes in the fabric 7.

[0059] In practice, the external thread 33 can be machined on the entire side of the punch 3, or it can be machined only on the upper side of the punch 3, such as... Figure 3 and Figure 4 As shown, this helps prevent a reduction in the strength and rigidity of the lower part of the punch 3 due to machining the external thread 33; more specifically, in implementation, the outer diameter of the section of the punch 3 with the machined external thread 33 (referred to as the external thread section 31) can preferably be larger than the section of the punch 3 without the machined external thread 33 (referred to as the smooth section 32), such as... Figure 5 and Figure 6 As shown, this helps to ensure and improve the strength and rigidity of the entire punch 3. Accordingly, in implementation, the positioning hole 23 can be constructed to fit the punch 3. For example, an internal thread 26 can be machined on the entire inner surface of the positioning hole 23. In this case, the lower end of the positioning hole 23 is flush with the lower end of the internal thread 26, and the distance between them is zero. Alternatively, the internal thread 26 can be machined only on the upper part of the positioning hole 23, which helps to reduce the machining difficulty and machining cost. In a further embodiment, the inner diameter of the section of the positioning hole 23 with the internal thread 26 machined (referred to as the internal thread section 24) can preferably be larger than the section of the positioning hole 23 without the internal thread 26 machined (referred to as the smooth hole section 25). That is, the positioning hole 23 adopts a stepped hole, such as... Figure 3 and Figure 4As shown, this not only allows for threaded engagement with the punch 3, which has an external threaded section 31 and a smooth rod section 32, but also enables a guiding engagement between the smooth hole section 25 and the smooth rod section 32. Specifically, the inner diameter of the smooth hole section 25 is slightly larger than the outer diameter of the smooth rod section 32, allowing the smooth hole section 25 to guide the movement of the punch 3. This ensures that the punch 3 moves strictly vertically to achieve precise punching, and also limits and supports the punch 3 along its circumference, preventing bending or even breakage during the punching process. This improves the reliability and service life of the punch 3. In practice, at least the inner diameter of the lower end of the positioning hole 23 can be the same as the inner diameter of the punching hole 13 for better fit.

[0060] To facilitate adjustment of the position of the punch 3, in one embodiment, the top of the punch 3 is further constructed with a twisting part 34 adapted to a twisting tool, so that the position of the punch 3 can be easily adjusted during use by means of the twisting tool and the twisting part 34; in implementation, the twisting part 34 can be an inner square corner, an inner hexagonal corner 61, a cross groove, a Torx groove, etc., such as... Figure 5 As shown, the twisting tool can be a handle or screwdriver adapted to the twisting part 34.

[0061] In practice, the lower end of punch 3 can be constructed as a plane, such as... Figure 6 and Figure 7 As shown, during use, the lower end of the punch 3 contacts the fabric 7, and punches the required hole in the fabric 7 using punching force; of course, in other embodiments, the lower end of the punch 3 can also be constructed as a bevel or other irregular structure, as long as the purpose of punching is achieved, and will not be described in detail here.

[0062] To ensure that each positioning hole 23 corresponds one-to-one with each stamping hole 13 during the punching process, in a further embodiment, the upper die 2 is movably constrained to the lower die 1, allowing the upper die 2 to move vertically up and down relative to the lower die 1. During this movement, each positioning hole 23 corresponds one-to-one with each stamping hole 13 and is coaxial. In implementation, the lower die 1 is provided with a first guide portion, and correspondingly, the upper die 2 is provided with a second guide portion adapted to the first guide portion. The first guide portion and the second guide portion form a vertical sliding pair, allowing the lower die 1 and the upper die 2 to form a vertical sliding pair through the cooperation of the first and second guide portions. This ensures that the upper die 2 can only move vertically up and down relative to the lower die 1, and cannot translate or rotate relative to the lower die 1. This ensures that each positioning hole 23 always corresponds one-to-one with each stamping hole 13 and is coaxial, which helps to guarantee and improve the punching accuracy.

[0063] In implementation, the first guide portion and the second guide portion can have various cooperative implementation methods. For example, in one implementation, the first guide portion may include at least two guide posts 14 arranged vertically. The guide posts 14 are disposed on the lower mold 1. For example, guide posts 14 are respectively disposed at the four corners of the lower mold 1. Figure 1 As shown, there are a total of four guide posts 14; correspondingly, the second guide part may include at least two guide holes 27 adapted to each guide post 14. The guide holes 27 are vertically arranged in the upper mold 2 and penetrate through the upper and lower ends of the upper mold 2. For example, guide holes 27 are respectively provided at the four corners of the upper mold 2. The size of the guide holes 27 is slightly larger than that of the guide posts 14. Figure 9 and Figure 10 As shown, there are a total of four guide holes 27. During assembly, the guide holes 27 of the upper mold 2 are respectively fitted onto each guide post 14 of the lower mold 1, so that the upper mold 2 can form a vertical moving pair with the lower mold 1 through the cooperation of the guide holes 27 and the guide posts 14, ensuring that the upper mold 2 can only move vertically relative to the lower mold 1.

[0064] In practice, the shape of the guide post 14 is adapted to the shape of the guide hole 27. For example, when the guide post 14 is a cylinder or tube, the guide hole 27 is a round hole, and the inner diameter of the guide hole 27 is slightly larger than the outer diameter of the guide post 14; or when the guide post 14 is a square post or tube, the guide hole 27 is a square hole, and the length and width of the guide hole 27 are slightly larger than the length and width of the guide post 14, respectively.

[0065] In another embodiment, the second guide portion may include at least two guide posts 14 arranged vertically. The guide posts 14 are disposed on the upper mold 2. Correspondingly, the first guide portion may include at least two guide holes 27 adapted to each guide post 14. The guide holes 27 are vertically disposed on the lower mold 1 and penetrate through the upper and lower ends of the lower mold 1. The guide posts 14 of the upper mold 2 are respectively inserted into each guide hole 27 of the lower mold 1, which can also achieve the same guiding effect, ensuring that the upper mold 2 is strictly vertically raised and lowered relative to the lower mold 1.

[0066] To facilitate the installation and fixation of the lower die 1, in practice, the lower die 1 is also constructed with a mounting part. This mounting part can be a through hole or threaded hole constructed in the lower die 1, allowing for convenient fixation of the lower die 1 to the desired position. Similarly, in practice, the upper die 2 is also constructed with a connecting part 28 for connecting to the stamping head in the stamping equipment. The connecting part 28 has various implementations. For example, the connecting part 28 can be a snap-fit ​​structure, a through hole, or a threaded hole constructed in the upper die 2, allowing the upper die 2 to be fixed to the stamping head of the stamping equipment using a snap-fit ​​interface or fasteners adapted to the through hole or threaded hole. Alternatively, the connecting part 28 can also be a groove or slot constructed on the side of the upper die 2, such as... Figure 9 and Figure 10As shown, the stamping head of the stamping equipment can clamp the upper die 2 through the groove or clamping slot, so as to fix the upper die 2 to the stamping head of the stamping equipment.

[0067] For easy understanding, this embodiment provides a method for using this punching die. For example, in a usage scenario, the lower die 1 in the punching die is fixed on the stamping platform of the stamping equipment, so that the upper surface 11 of the lower die 1 remains horizontal. Correspondingly, the upper die 2 in the punching die is fixedly connected to the stamping head of the stamping equipment. The upper die 2 is located directly above the lower die 1, and the first guiding portion and the second guiding portion are in a sliding fit state. Initially, there is a gap between the lower surface 21 of the upper die 2 and the upper surface 11 of the lower die 1 to allow the fabric 7 to pass through. And initially, a punching needle 3 is arranged in each positioning hole 23 of the upper die 2, and the punching needles 3 are all in the initial position; when it is necessary to form a "middle" character pattern on the fabric 7 by punching, only need to adjust the punching needles 3 at the corresponding positions on the upper die 2 to the stamping position, so that the adjusted punching needles 3 together form a "middle" character pattern, as Figure 8 shown; then place the fabric 7 in the gap between the upper die 2 and the lower die 1, and the "middle" character pattern formed by the punching needles 3 above is directly opposite to the fabric 7 below, as Figure 9 and Figure 10 shown; then start the stamping equipment, and the stamping head of the stamping equipment drives the upper die 2 to press vertically downward, so that a "middle" character pattern composed of stamping holes 13 can be formed on the fabric 7; finally, the stamping head of the stamping equipment drives the upper die 2 back to the initial position, and the fabric 7 can be taken out, so that this punching die can be used again, and different patterns can be formed by adjusting the position of the punching needles 3. It can not only meet the punching requirements of different patterns, which is very convenient and efficient, but also does not need to replace the punching die, and the cost is greatly reduced.

[0068] Embodiment 2

[0069] The main difference between this Embodiment 2 and the above Embodiment 1 is that in the punching die provided in this embodiment, when the punching needle 3 is detachably fixed in the positioning hole 23, for example, when the punching needle 3 is threadedly connected to the positioning hole 23, the lower end of the punching needle 3 is in a state of protruding from the lower surface 21 of the upper die 2. That is to say, when the punching needle 3 is installed on the upper die 2, the punching needle 3 is in the stamping position.

[0070] In this embodiment, the length of the punch pin 3 can be greater than the depth of the positioning hole 23 in the vertical direction, so as to ensure that after the punch pin 3 is installed on the upper die 2, the punch pin 3 is in the punching position. Of course, in practice, the length of the punch pin 3 can also be less than or equal to the depth of the positioning hole 23 in the vertical direction. At this time, for example, the internal thread 26 in the positioning hole 23 can be machined over the entire inner surface of the positioning hole 23 or the internal thread 26 can be machined in the lower part of the positioning hole 23. When installing the punch pin 3, the punch pin 3 is threadedly connected to a position near the lower end of the positioning hole 23, so that the punch pin 3 after installation is in the punching position. Another example is that the internal thread 26 in the positioning hole 23 can be only machined in the upper part of the positioning hole 23. As Figure 11 shown, it is only necessary that the distance between the lower end of the internal thread 26 and the lower end of the positioning hole 23 is less than the length of the punch pin 3. At this time, after the punch pin 3 is threadedly connected to the positioning hole 23, the lower end of the punch pin 3 protrudes from the lower surface 21 of the upper die 2, so that the punch pin 3 is in the punching position.

[0071] The difference in the usage method between the punching die provided in this embodiment and the punching die provided in Embodiment 1 is as follows: Initially, no punch pin 3 is provided in each positioning hole 23 of the upper die 2; before punching, the punch pin 3 can be installed at the corresponding position of the upper die 2 according to the required pattern. After installation, the punch pin 3 is in the punching position, so that all the punch pins 3 in the punching position together form the required pattern, and no punch pin 3 needs to be installed at other positions. For example, when it is necessary to form a "middle" character pattern by punching on the fabric 7, it is only necessary to install the punch pin 3 in the positioning hole 23 at the corresponding position on the upper die 2. Each punch pin 3 together forms a "middle" character pattern, and no punch pin 3 needs to be installed at other positions. Then, the fabric 7 is placed in the gap between the upper die 2 and the lower die 1, and the "middle" character pattern formed by the punch pins 3 above is directly opposite to the fabric 7 below; then the stamping equipment is started, and the stamping head of the stamping equipment drives the upper die 2 to punch vertically downward, so that a "middle" character pattern composed of stamping holes 13 can be formed on the fabric 7; finally, the stamping head of the stamping equipment drives the upper die 2 back to the initial position, and the fabric 7 is taken out, so that this punching die can be used again, and different patterns can be formed by installing the punch pin 3 at different positions. It can not only meet the punching requirements of different patterns, which is very convenient and efficient, but also does not need to replace the punching die, and the cost is greatly reduced.

[0072] Embodiment 3

[0073] In practical use, punching dies are often quite large. For example, the lengths of the upper die 2 and lower die 1 in a punching die typically exceed 1 meter, such as 1.5 meters or 1.8 meters. During actual use, there is a risk of collision between the upper die 2 and the lower die 1. Furthermore, the upper die 2 requires the machining of a positioning hole array 22. If the upper die 2 is made of a harder metal material, not only will the difficulty of machining the internal thread 26 increase significantly, leading to a substantial increase in cost, but if the upper die 2 develops cracks or other damage, the entire upper die 2 needs to be replaced, significantly increasing subsequent maintenance costs. If the upper die 2 is made of a lower hardness metal material, although the cost will be significantly reduced, the probability of the upper die 2 being damaged by impact will increase significantly, leading to frequent replacements of the upper die 2. This results in unreliable modules and high maintenance costs, a problem that urgently needs to be addressed. The main difference between this embodiment 3 and the aforementioned embodiments 1 or 2 is that, in the punching die provided in this embodiment, the upper die 2 includes a stabilizing die 4 and an adjusting die 5, such as... Figures 12-14 As shown, the adjusting mold 5 is detachably disposed above the stabilizing mold 4, such that the stabilizing mold 4 is located between the adjusting mold 5 and the lower mold 1. The lower surface 21 of the stabilizing mold 4 is equivalent to the lower surface 21 of the upper mold 2 in the above embodiment. The fabric 7 is located between the lower mold 1 and the stabilizing mold 4, as shown. Figure 14 As shown; that is, in this embodiment, the upper mold 2 is composed of a stabilizing mold 4 and an adjusting mold 5. In implementation, the stabilizing mold 4 is constructed with a stabilizing hole array 41, as shown... Figure 12 As shown, the stabilizing hole array 41 includes multiple stabilizing holes 42 arranged in an array. In implementation, the upper and lower ends of the stabilizing holes 42 respectively penetrate the upper and lower ends of the stabilizing module 4, as shown. Figure 12 As shown, the stabilizing hole 42 is mainly used to maintain the stability of the punch 3. It can guide the movement of the punch 3, ensuring that the punch 3 moves strictly vertically to achieve the purpose of precise punching. The stabilizing hole 42 can also limit and support the punch 3 along the circumferential direction, avoiding the problem of the punch 3 bending or even breaking during the stamping process, which is beneficial to improving the reliability and service life of the punch 3.

[0074] Accordingly, such as Figure 13 As shown, the adjusting mold 5 is constructed with an adjusting hole array 51, which includes multiple adjusting holes 52 arranged in an array. Each adjusting hole 52 has an internal thread 26 adapted to the punch 3. In implementation, the upper and lower ends of the adjusting hole 52 respectively penetrate the upper and lower ends of the adjusting mold 5. Figure 13 As shown, the adjustment hole 52 is mainly used for the detachable connection of the punch 3, and in some application scenarios, it can also adjust the height of the punch 3 in the vertical direction to meet the punching requirements of different occasions.

[0075] When the adjusting module 5 is connected to the stabilizing module 4, each adjusting hole 52 in the adjusting hole array 51 corresponds one-to-one with each stabilizing hole 42 in the stabilizing hole array 41, such as... Figure 15 As shown, each stabilizing hole 42 in the stabilizing hole array 41 corresponds one-to-one with each punching hole 13 in the punching hole array 12. That is, in this embodiment, the adjusting hole 52, the stabilizing hole 42, and the adjusting hole 52 are coaxial, so that the punch 3 extending from the lower end of the stabilizing hole 42 can be inserted into the corresponding punching hole 13 to achieve the purpose of punching. In this embodiment, the stabilizing hole 42 and the corresponding adjusting hole 52 together constitute the positioning hole 23 in the above embodiment, and the stabilizing hole array 41 and the adjusting hole array 51 are stacked together to constitute the positioning hole array 22 in the above embodiment.

[0076] In implementation, the spacing between two adjacent stabilizing holes 42 in the stabilizing hole array 41 can be equal; correspondingly, the spacing between two adjacent adjusting holes 52 in the adjusting hole array 51 is also equal. Figure 12 and Figure 13 As shown, this makes the spacing between two adjacent positioning holes 23 in the positioning hole array 22 equal, which makes it easier to arrange the patterns that need to be stamped.

[0077] In implementation, the number of stabilizing holes 42 can be determined according to actual needs, and the shape formed by the stabilizing hole array 41 can also be determined according to actual needs. For example, the stabilizing hole array 41 can be formed into a rectangular, circular, or elliptical shape, etc., as an example. Figure 12 As shown, in this embodiment, the stabilizing hole array 41 is rectangular, such that its shape is the same as that of the stamping hole array 12, so that they can fit together. In a more preferred embodiment, the inner diameter of the stabilizing hole 42 is the same as the inner diameter of the stamping hole 13. Similarly, in implementation, the number of adjusting holes 52 can be determined according to actual needs, and the shape formed by the adjusting hole array 51 can also be determined according to actual needs. For example, the adjusting hole array 51 can be formed into a rectangular, circular, or elliptical shape, etc. Figure 13 As shown, in this embodiment, the adjustment hole array 51 is rectangular, which can not only meet the punching requirements of larger fabric 7 and larger pattern, but also make the shape of the adjustment hole array 51 the same as the shape of the stabilizing hole array 41 and the shape of the punching hole array 12 so that they can cooperate with each other.

[0078] In this embodiment, the shape of the stabilizing mold 4 is preferably adapted to the shape of the lower mold 1, and the shape of the adjusting mold 5 is preferably adapted to the shape of the stabilizing mold 4. Therefore, in this embodiment, both the stabilizing mold 4 and the adjusting mold 5 adopt a cuboid structure. Of course, in other embodiments, the stabilizing mold 4 and the adjusting mold 5 can also be constructed as a circle, an ellipse, a triangle, or an irregular structure, etc.

[0079] It is understandable that, in implementation, the first guide portion can be provided only in the stabilizing mold 4. For example, the first guide portion can be a guide hole 27, and the guide hole 27 is only constructed in the stabilizing mold 4. The size of the adjusting mold 5 can be constructed to be smaller than the size of the stabilizing mold 4, so as to avoid the guide hole 27 and not obstruct the guide hole 27. Furthermore, in implementation, the first guide portion can be constructed in both the stabilizing mold 4 and the adjusting mold 5, for example... Figures 12-14 As shown, the lower mold 1, stabilizing mold 4, and adjusting mold 5 all adopt a cuboid structure. The lower mold 1, stabilizing mold 4, and adjusting mold 5 have the same length and width. The first guide portion includes a guide hole 27 constructed in the stabilizing mold 4 and a guide hole 27 constructed in the adjusting mold 5, as shown... Figure 14 As shown, the guide holes 27 in the stabilizing mold 4 correspond one-to-one with the guide holes 27 in the adjusting mold 5, which can also play a good guiding role. Examples will not be given here.

[0080] Preferably, in one embodiment, the inner diameter of the adjusting hole 52 is larger than the inner diameter of the stabilizing hole 42, such as... Figures 15-17 As shown, this not only facilitates the machining of the internal thread 26 within the adjusting hole 52, but also allows for a more secure connection of the punch 3 via the thread, preventing the punch 3 from moving vertically relative to the upper die assembly during the punching process and affecting the punching effect. Correspondingly, the outer diameter of the section of the punch 3 with the machined external thread 33 (referred to as the external thread section 31) is larger than the section of the punch 3 without the machined external thread 33 (referred to as the smooth section 32), such as... Figure 15 As shown, the outer diameter of the external thread section 31 is adapted to the adjusting hole 52, and the outer diameter of the smooth section 32 is slightly smaller than that of the stabilizing hole 42. The step between the adjusting hole 52 and the stabilizing hole 42 can limit and constrain the punch 3, preventing the punch 3 from being positioned too low.

[0081] Based on the implementation method in Embodiment 1, in this embodiment, the length of the punch 3 can be less than the sum of the depths of the stabilizing hole 42 and the adjusting hole 52, so that during use, the position of the punch 3 (initial position and punching position) can be switched by rotating the punch 3, such as... Figure 16 and Figure 17 As shown, this punching die can be used according to the method of use in Example 1, which will not be repeated here.

[0082] Based on the implementation method in Embodiment 2, in this embodiment, the length of the punch 3 is set to be greater than the depth of the stabilizing hole 42, so that when the punch 3 is threadedly connected to the adjusting hole 52, the lower end of the punch 3 is in a state of protruding from the lower surface 21 of the stabilizing mold 4. That is, when the punch 3 is installed on the adjusting mold 5, the punch 3 is in the punching position, so that the punching mold can be used according to the usage method in Embodiment 2, which will not be repeated here.

[0083] In practice, to facilitate the detachable mounting of the adjusting mold 5 on top of the stabilizing mold 4, various implementation methods are available. For example, the adjusting mold 5 can be glued to the upper surface 11 of the stabilizing mold 4. Alternatively, the adjusting mold 5 can be detachably connected to the upper surface 11 of the stabilizing mold 4 using fasteners such as bolts or screws. For instance, the stabilizing mold 4 is constructed with at least two countersunk holes, and correspondingly, the adjusting mold 5 is constructed with threaded holes that are adapted to the countersunk holes. Thus, the adjusting mold 5 can be detachably mounted on the stabilizing mold 4 using fasteners such as bolts or screws that are adapted to the countersunk holes and threaded holes.

[0084] In this embodiment, the upper die 2 is configured as a combination of a stabilizing die 4 and an adjusting die 5. The stabilizing die 4 contacts the lower die 1, while the internal thread 26 is machined into the adjusting die 5. This eliminates the need to machine threads on the stabilizing die 4 during actual implementation, allowing the stabilizing die 4 to be made of a harder metal material. For example, the stabilizing die 4 can be made of high-strength alloy steel plate, high-hardness stainless steel plate, high-temperature alloy plate, or hard alloy plate (such as tungsten cobalt (YG6, YG8), tungsten titanium cobalt (YT15), etc.). This results in higher hardness for the punching die, making the stabilizing die 4 less prone to cracking during stamping and impact, effectively improving the reliability and service life of the stabilizing die 4. This effect is particularly significant for large-sized stabilizing dies 4 (e.g., stabilizing dies 4 with a length exceeding 1 meter). In implementation, the material of the lower die 1 can be the same as that of the stabilizing die 4 to effectively improve the reliability and service life of the lower die 1. Since the adjusting mold 5 needs to be machined with internal threads 26, and the adjusting mold 5 will not directly collide with the lower mold 1, the adjusting mold 5 can be preferably made of a metal material with lower hardness. For example, the adjusting mold 5 can be preferably made of low carbon steel plate (such as Q235, 20 steel), free-cutting steel plate (such as Y12, Y20), and aluminum alloy plate, etc., so that the hardness of the adjusting mold 5 is relatively low. This not only makes it easier to machine internal threads 26 on the adjusting mold 5, significantly reducing the machining difficulty, but also greatly reduces the cost of the adjusting mold 5. In addition, the adjusting mold 5 is detachably set on the stabilizing mold 4. When the adjusting mold 5 is damaged, it can be disassembled and replaced separately, which greatly reduces the maintenance cost in the later stage.

[0085] Example 4

[0086] To address the problem that the punch 3 easily rotates during the punching process, causing its position to change and affecting the punching effect or even leading to punching failure, the main difference between this embodiment 4 and the above embodiments is that the punching die provided in this embodiment also includes a locking component 6, such as... Figure 18 and Figure 19As shown, the fastener 6 is constructed with an external thread 33 that is adapted to the internal thread 26 in the upper die assembly. The fastener 6 is threadedly connected to the positioning hole 23 (or adjustment hole 52) and abuts against the punch 3 below, thereby achieving the purpose of tightening the punch 3. This can effectively prevent the punch 3 from rotating during the punching process and prevent the punch 3 from coming out of the adjustment hole 52 during the punching process. This not only ensures the punching effect but also makes the entire punching die more stable and reliable.

[0087] In implementation, the setter 6 can preferably be a 61mm internal hex socket set screw, such as... Figure 18 and Figure 19 As shown, the side of the hexagon socket 61 set screw has an external thread 33, and the upper end of the hexagon socket 61 set screw has an internal hexagon 61, so that the hexagon socket 61 set screw can be turned by a torsion tool that is compatible with the internal hexagon socket 61, which is very convenient.

[0088] Example 5

[0089] This embodiment 5 provides a stamping device, including a stamping device body and a punching die as described in the above embodiments. The stamping device body can be an existing stamping device. For example, in this embodiment, the stamping device body includes a frame, a stamping platform mounted on the frame, a stamping power source mounted on the frame, and a stamping head. The stamping head is positioned directly above the stamping platform, and the stamping power source is connected to the stamping head for driving the stamping head to move vertically up and down relative to the stamping platform, thereby achieving the stamping purpose.

[0090] In this embodiment, the lower die 1 of the punching die is fixed to the punching platform of the punching equipment body, and the upper die 2 of the punching die is fixedly connected to the punching head of the punching equipment body, so that the upper die 2 can be vertically raised and lowered relative to the lower die 1 under the drive of the punching head, so as to achieve the purpose of punching.

[0091] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A punching die, characterized in that, It includes an upper mold assembly and a lower mold for supporting the fabric, wherein the upper mold assembly includes an upper mold adapted to the lower mold and a punch, wherein, The lower die is constructed with a punching hole array, which includes multiple punching holes arranged in an array; The upper mold is constructed with an array of positioning holes, which includes multiple positioning holes arranged in an array, and the positioning holes are constructed with internal threads. The upper die is vertically adjustable and is mounted on the lower die, with each positioning hole corresponding to a stamping hole. The punch has an external thread that is adapted to the internal thread. The punch is detachably connected to the positioning hole through the engagement of the external thread and the internal thread. The lower end of the punch corresponds to the punching hole, and the punch can be inserted into the punching hole.

2. The punching die according to claim 1, characterized in that, The length of the punch is greater than the distance between the lower end of the positioning hole and the internal thread. When the punch is threaded into the positioning hole, the lower end of the punch protrudes from the lower surface of the upper die.

3. The punching die according to claim 1, characterized in that, The length of the punch is less than the depth of the positioning hole in the vertical direction, and the length of the external thread in the punch is less than the length of the internal thread in the positioning hole. The punch is threaded into the positioning hole. By rotating the punch, the position of the lower end of the punch can be adjusted so that the lower end of the punch is retracted into the positioning hole or extends out of the positioning hole.

4. The punching die according to claim 1, characterized in that, The positioning hole includes an internally threaded section at the top and a smooth section at the bottom, with the internally threaded section and the smooth section connected. The punch includes an external thread section and a smooth rod section connected to the external thread section. The outer diameter of the external thread section is larger than the outer diameter of the smooth rod section, and the end of the external thread section is constructed with a torsion part. The external thread section is threadedly connected to the internal thread section, and the smooth rod section is inserted into the smooth hole section.

5. The punching die according to claim 1, characterized in that, The upper mold assembly also includes a retaining member, which has an external thread adapted to the internal thread. The retaining member is threadedly connected to the positioning hole and abuts against the punch below. And / or, the lower mold is provided with a first guide portion, and the upper mold is provided with a second guide portion adapted to the first guide portion, the first guide portion and the second guide portion forming a sliding pair in the vertical direction.

6. The punching die according to any one of claims 1-5, characterized in that, The upper mold includes a stabilizing mold and an adjusting mold. The stabilizing mold is constructed with an array of stabilizing holes, which includes multiple stabilizing holes arranged in an array and penetrating the upper and lower ends of the stabilizing mold. The adjusting mold is constructed with an array of adjusting holes, which includes multiple adjusting holes arranged in an array and penetrating the upper and lower ends of the adjusting mold. The adjusting holes are constructed with internal threads adapted to the punch. The adjusting mold is detachably set on the stabilizing mold, and each adjusting hole corresponds to each stabilizing hole, and each stabilizing hole corresponds to each stamping hole; the stabilizing hole and the adjusting hole corresponding to the stabilizing hole constitute the positioning hole.

7. The punching die according to claim 6, characterized in that, The hardness of the stabilizing mold is greater than that of the adjusting mold.

8. The punching die according to claim 7, characterized in that, The stabilizing mold is made of high-strength alloy steel plate, high-hardness stainless steel plate, high-temperature alloy plate, or hard alloy plate. The adjusting mold is made of low-carbon steel plate, free-cutting steel plate, or aluminum alloy plate.

9. The punching die according to claim 1, characterized in that, The lower die is also provided with a mounting part; the upper die is also provided with a connecting part for connecting the stamping head in the stamping equipment; The upper surface of the lower mold is flat and is used to support the fabric; the lower surface of the upper mold is flat. The lower mold adopts a cuboid structure; the upper mold adopts a cuboid structure. The spacing between two adjacent positioning holes is equal; At least the inner diameter of the lower end of the positioning hole is the same as the inner diameter of the stamping hole; The upper and lower ends of the positioning hole pass through the upper and lower ends of the upper mold, respectively; The upper end of the punch hole penetrates the upper surface of the lower die, and the lower end of the punch hole penetrates the lower surface of the lower die. The lower mold is further provided with a first guide portion, and the upper mold is further provided with a second guide portion adapted to the first guide portion. The first guide portion and the second guide portion constitute a sliding pair in the vertical direction. The first guide portion includes at least two guide posts arranged in the vertical direction, and the guide posts are arranged in the lower mold. The second guide portion includes at least two guide holes adapted to each guide post, and the guide holes are arranged in the upper mold and penetrate through the upper end and the lower end of the upper mold. The upper mold is sleeved on the guide posts through the guide holes.

10. A stamping device, comprising a stamping device body, characterized in that, It also includes the punching die according to any one of claims 1-9, wherein the punching die is disposed on the body of the stamping equipment.

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