Die structure with punch quick-changing function

Abstract

The utility model belongs to the field of stamping dies, and provides a die structure with a punch quick-changing function, which comprises a lower die holder and an upper die holder movably arranged above the lower die holder. A plurality of inserts are arranged in the upper die base, at least one punch is correspondingly arranged in each insert, and the punches can be close to the lower die base along with the upper die base so as to punch a through hole in a formed product in a material belt. Compared with the prior art, the die has the advantages that after the inner stripper plate and the insert are sequentially detached from the upper die base, the punches can be quickly replaced, the downtime caused by replacing punches of different specifications is shortened, and the product quality and the overall efficiency of a production line are guaranteed; and meanwhile, by means of the design of the inner stripping plate and the stripping rod, it is ensured that the product can be effectively reserved on the punching boss after each time of punching, convenience is provided for product discharging, the phenomenon of adhesion or damage of the product caused by a traditional method is avoided, and it is ensured that the qualified rate of the product is not affected.

Description

Technical Field

[0001] This utility model belongs to the field of stamping dies, and specifically relates to a die structure with a quick-change punch function. Background Technology

[0002] Stamping dies are an indispensable part of manufacturing, especially in areas such as sheet metal processing and plastic molding. These industries rely on stamping dies to manufacture parts of various shapes and sizes, from automotive body panels and electronic device housings to components for everyday consumer goods.

[0003] Traditional stamping die designs are typically customized for specific product specifications. When it is necessary to change the product type or adjust the size, it is often necessary to disassemble the upper backing plate, upper clamping plate, and upper template in the upper die holder and replace the punch accordingly. This not only increases production preparation time but also limits the flexibility of the production line. Moreover, the precision and quality of the punch also determine the quality of the final product. After stamping, the finished product may sometimes stick to the die surface or internal structure, making it difficult to remove. This not only increases the difficulty of operation but also easily causes scratches, deformation, or even damage to the product, thereby reducing the yield and affecting the overall quality of the product. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a mold structure with punch quick change function that can realize the quick change of punch and ensure that the product can remain on the punching boss after each stamping, thereby improving the quality of the final product.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose a mold structure with punch quick change function for forming the required product on the material strip, including: a lower mold base and an upper mold base, wherein the upper mold base is movably disposed above the lower mold base;

[0006] A plurality of punches are provided in the upper die base, and a plurality of inserts are provided in each insert. At least one punch is provided in each insert. The punches can move closer to the lower die base with the upper die base to punch through holes in the product on the strip.

[0007] An inner stripper plate and a stripper rod are detachably connected inside the upper mold base. The inner stripper plate movably abuts against the insert and together with the upper mold base forms a product cavity. The punch passes through the inner stripper plate and extends into the product cavity. The stripper rod extends into the product cavity and can retract into the inner stripper plate.

[0008] A stamping assembly is disposed on the lower die base. A stamping boss is fixedly disposed on the stamping assembly. The stamping boss can stamp the product on the strip when the upper die base extrudes the stamping assembly.

[0009] When the upper mold base is pressed against the lower mold base, the stripper rod retracts to the inner stripper plate, so that the stamping boss can stamp the product into the product cavity;

[0010] The stripper rod can extend into the product cavity when the upper die holder moves away from the lower die holder, so as to pre-leave the product on the punching boss.

[0011] In the aforementioned mold structure with quick punch change function, the inner stripper plate is provided with several connecting holes, through which fasteners can pass to detachably connect the inner stripper plate to the upper mold base.

[0012] In the above-mentioned mold structure with quick punch change function, the insert has a locking hole, the inner stripper has a limiting hole, the punch is movably inserted into the limiting hole, and connected to the upper mold base through the connector in the locking hole to limit the displacement of the punch.

[0013] In the aforementioned mold structure with quick punch change function, the punching assembly further includes a lower backing plate and an outer ejector plate. The lower backing plate is disposed on the lower mold base, and fixed guide posts are symmetrically installed on the periphery of the lower backing plate. The outer ejector plate is sleeved on the fixed guide posts and moves above the lower backing plate. The punching boss is detachably connected to the middle position of the lower backing plate and passes through the outer ejector plate.

[0014] In the above-mentioned mold structure with punch quick change function, a stripping spring is also provided on the lower pad. The top end of the stripping spring moves against the bottom wall of the outer stripping plate so that the outer stripping plate can reciprocate along the axis of the fixed guide post.

[0015] In the above-mentioned mold structure with quick punch change function, the upper mold base also includes an upper template, an upper clamping plate and an upper pad arranged in sequence. The inner ejector plate is disposed in the upper template and together with it forms the product cavity. The insert is disposed in the upper clamping plate and is movably connected to the upper pad.

[0016] In the above-mentioned mold structure with quick punch change function, the top end of the stripper bar is also formed with an anti-slip block, and an elastic element is connected between the anti-slip block and the upper mold base so that the end of the stripper bar away from the anti-slip block can be movably extended into the product cavity.

[0017] In the above-mentioned mold structure with quick punch change function, the upper template is detachably connected to a plurality of die cutters extending into the product cavity, and the die cutters are used to form recessed grooves on the product.

[0018] In the above-mentioned mold structure with quick punch change function, a fixed guide sleeve is installed inside the upper template, and the fixed guide sleeve is movably sleeved on the fixed guide post.

[0019] In the aforementioned mold structure with quick punch change function, the upper mold base is equipped with a plurality of first limiting posts, and the lower mold base is equipped with a plurality of second limiting posts. The first limiting posts and the second limiting posts are arranged in a one-to-one correspondence and move against each other.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention provides a mold structure with quick punch change function. By disassembling the inner stripper plate and insert from the upper mold base in sequence, the punch can be quickly changed, reducing downtime caused by changing punches of different specifications, effectively ensuring product quality and overall production line efficiency. Moreover, by utilizing the design of the inner stripper plate and stripper rod, the product can be effectively left on the punching boss after each stamping, providing convenience for workers or robots to unload the material. At the same time, it avoids the phenomenon of product sticking or damage caused by traditional methods, ensuring that the product qualification rate is not affected.

[0022] (2) By relying on the stripping spring and the fixed guide post, the outer stripping plate can move relative to the stamping boss when it is squeezed by the upper template, ensuring that the product can be stamped smoothly and accurately after forming, so as to prepare for subsequent stamping operations.

[0023] (3) The anti-detachment block effectively limits the distance the stripper rod extends into the product cavity. At the same time, by utilizing the elastic contraction and expansion capabilities of the elastic element, the anti-detachment rod can accurately and stably detach the product from the product cavity when the upper mold base is far away from the lower mold base, thus ensuring the smoothness of product unloading and the overall quality of the product. Attached Figure Description

[0024] Figure 1 This is an exploded view of the area between the upper and lower mold bases;

[0025] Figure 2 This is a schematic diagram of the installation structure of the upper mold base;

[0026] Figure 3 It is an exploded view of the internal stripper plate, stripper bar, and punch.

[0027] Figure 4 This is a schematic diagram of the installation structure of the lower mold base.

[0028] In the diagram, 1 represents the material strip;

[0029] 2. Lower mold base; 20. Second limiting post;

[0030] 3. Upper mold base; 30. Insert; 300. Locking hole; 31. Upper template; 310. Product cavity; 311. Die cutter edge; 32. Upper clamping plate; 33. Upper backing plate; 34. Fixed guide sleeve; 35. First limit post;

[0031] 4. Punch;

[0032] 5. Inner release plate; 50. Connecting hole; 51. Limiting hole; 52. Guide hole;

[0033] 6. Material release bar; 60. Anti-detachment block;

[0034] 7. Punching assembly; 70. Punching boss; 71. Lower pad; 72. Outer stripper plate; 73. Fixed guide post; 74. Stripper spring. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0037] like Figures 1 to 4As shown, this utility model discloses a mold structure with quick-change function for punches 4, used for forming the required product on a strip 1. It includes: a lower mold base 2 and an upper mold base 3, the upper mold base 3 being movably disposed above the lower mold base 2; several punches 4, with several inserts 30 disposed within the upper mold base 3, each insert 30 corresponding to at least one punch 4. The punches 4 can move closer to the lower mold base 2 along with the upper mold base 3 to punch through holes in the product on the strip 1; an inner ejector plate 5 and an ejector rod 6, detachably connected within the upper mold base 3. The inner ejector plate 5 movably abuts against the inserts 30 and together with the upper mold base 3 forms a product cavity 310. The punch 4 penetrates the inner ejector plate 5 and extends into the product cavity 310; the ejector rod 6 extends into the product cavity 310 and can retract to the inner ejector plate 5; the punching assembly 7 is set on the lower die base 2, and a punching boss 70 is fixedly set on the punching assembly 7. The punching boss 70 can punch and form the product on the strip 1 when the upper die base 3 squeezes the punching assembly 7; when the upper die base 3 is close to the lower die base 2, the ejector rod 6 retracts to the inner ejector plate 5 so that the punching boss 70 can punch and form the product in the product cavity 310; the ejector rod 6 can extend into the product cavity 310 when the upper die base 3 is away from the lower die base 2 so that the product is reserved on the punching boss 70.

[0038] This solution primarily aims to sequentially stamp the required product shapes onto strip 1. Specifically, for example... Figures 1 to 4 As shown, in this embodiment, the material strip 1 can be sequentially fed to the lower die base 2 (see reference) by an external traction machine (not shown in the figure). Figure 1Before stamping, it is necessary to ensure that the quality of the punch 4 meets the required processing requirements. In this embodiment, the punch 4 is installed in the insert 30 in the upper die base 3 to ensure that each punch 4 is correctly aligned with its working position. At the same time, the inner stripper plate 5 is detachably connected to the upper die base 3. While forming the product cavity 310, it can also ensure the accuracy and stability of the punch 4 when stamping the product shape. Therefore, when the punch 4 shows signs of wear or damage, the inner stripper plate 5 can be disassembled, and the insert 30 can be removed from the upper die holder 3 to achieve quick replacement of the punch 4, reducing downtime caused by die replacement and improving the overall efficiency of the production line. Once the quality of the punch 4 is confirmed and the material strip 1 is within the working area of ​​the feeding die, the upper die holder 3 can move downwards and gradually approach the lower die holder 2. During the process of the two being completely pressed together, the upper die holder 3 can compress the punching assembly 7 relative to the punching boss 70 (i.e., there is a certain height difference between the upper surfaces of the punching assembly 7 and the punching boss 70). Since the entire material strip 1 is located on the lower die holder 2, as the punch 4 passes through the material strip 1, the punching boss 70 can... The strip 1 is stamped to form the desired product shape (at this time, the product is inside the product cavity 310); at the same time, the stripper 6 retracts into the inner stripper plate 5, leaving space for the subsequent product forming; after the stamping action is completed, the upper die holder 3 can start to move upward away from the lower die holder 2. At this time, the stripper 6 is no longer subject to the stamping pressure of the stamping boss 70 and automatically extends, thereby contacting the product and pushing it away from the product cavity 310, ensuring that the product is stably pre-retained on the stamping boss 70, which is convenient for subsequent removal operations. The optimized stripping mechanism ensures that the product can be smoothly separated from the mold after each stamping, avoiding the product sticking problem that may occur in the traditional method, thus supporting a more efficient continuous production mode.

[0039] The inner ejector plate 5 has several connecting holes 50, through which fasteners can pass to detachably connect the inner ejector plate 5 to the upper mold base 3.

[0040] Preferably, such as Figure 2 and Figure 3 As shown, in this embodiment, the inner ejector plate 5 and the insert 30 are only installed in a movable abutment manner and there is no mutual connection between them. Therefore, after the insert 30 and the punch 4 are installed, they are detachably fixed to the upper die base 3 through the connecting hole 50 on the inner ejector plate 5 using fasteners (such as bolts, screws, etc.). This ensures that the inner ejector plate 5 and the punch 4 can work stably during the stamping process, avoiding displacement or loosening that would affect the quality of the product.

[0041] The insert 30 has a locking hole 300, the inner ejector plate 5 has a limiting hole 51, the punch 4 is movably inserted into the limiting hole 51, and is connected to the upper die base 3 through the connector in the locking hole 300 to limit the displacement of the punch 4.

[0042] More preferably, such as Figure 2 and Figure 3 As shown, similarly, a locking hole 300 is provided in the insert 30, and a limiting hole 51 for the punch 4 to be inserted is provided at a corresponding position on the inner ejector plate 5. As the punch 4 is inserted into the limiting hole 51, it effectively works with the insert 30 to limit the displacement of the punch 4 in the lateral and longitudinal directions, ensuring the stability and accuracy of the punch 4 when stamping through holes in the product. As for the connection of the insert 30, this embodiment uses a connector in the locking hole 300 (similar to the fastener structure described above, and can also use other connecting parts such as bolts or pins to replace it) to fix the punch 4 to the upper die base 3, ensuring that the punch 4 maintains a vertical posture during operation. It can be seen that during the replacement of the punch 4, it is only necessary to disassemble the fastener, remove the inner ejector plate 5, and unscrew the connector to remove the insert 30 to complete the replacement of the punch 4 on the insert 30. The overall operation is convenient and ensures stamping accuracy.

[0043] The punching assembly 7 also includes a lower backing plate 71 and an outer ejector plate 72. The lower backing plate 71 is disposed on the lower die base 2, and fixed guide posts 73 are symmetrically installed on the periphery of the lower backing plate 71. The outer ejector plate 72 is sleeved on the fixed guide posts 73 and moves above the lower backing plate 71. The punching boss 70 is detachably connected to the middle position of the lower backing plate 71 and passes through the outer ejector plate 72.

[0044] like Figure 1 and Figure 4 As shown, before the mold closes, the upper surface of the outer ejector plate 72 and the upper surface of the punching boss 70 are flush. As the upper mold base 3 moves downwards closer to the lower mold base 2, the product cavity 310 is directly above the punching boss 70. During the continuous tightening of the upper and lower molds, the upper mold base 3 can apply a force to move the outer ejector plate 72 downwards. Figure 4 The outer strip plate 72 moves horizontally towards the lower pad 71 along the axis of the fixed guide post 73 (the stamping boss 70 remains stationary). This creates a height difference between the upper surfaces of the outer strip plate 72 and the stamping boss 70. The stamping boss 70 then stamps the strip 1 on the outer strip plate 72 into the required product shape. During this process, the fixed guide post 73 provides precise guidance for the outer strip plate 72, ensuring that it maintains the correct vertical movement throughout the stamping process and avoiding lateral displacement, thereby improving stamping accuracy.

[0045] More preferably, such as Figure 4As shown, this embodiment also provides a stripping spring 74 on the lower pad 71. The top of the stripping spring 74 moves against the bottom wall of the outer stripping plate 72. When the outer stripping plate 72 moves closer to the lower pad 71 along the axis of the fixed guide post 73, the stripping spring 74 is in a compressed state, so that the punching boss 70 can better punch the strip 1. At the same time, after the upper die holder 3 moves away from the lower die holder 2, the outer stripping plate 72 is reset to a position flush with the surface of the punching boss 70 by relying on the release spring, so as to provide stable support for the strip 1 before the stamping action.

[0046] The upper mold base 3 also includes an upper template 31, an upper clamping plate 32 and an upper pad 33 stacked in sequence. The inner ejector plate 5 is disposed in the upper template 31 and together with it forms a product cavity 310. The insert 30 is disposed in the upper clamping plate 32 and is movably connected to the upper pad 33.

[0047] like Figure 2 and Figure 3 As shown, in this embodiment, the upper template 31, upper clamping plate 32, and upper backing plate 33 are sequentially stacked within the upper mold base 3, ensuring a tight fit between each layer and a stable installation, thus enhancing the stability and reliability of the overall mold structure. Especially under high-intensity stamping conditions, this design effectively prevents deformation and ensures consistency in each stamping. Furthermore, the product cavity 310 formed by the inner ejector plate 5 and the upper template 31 ensures that the punch 4 can accurately enter the predetermined position during stamping, improving stamping accuracy. Simultaneously, the movable connection of the insert 30 within the upper clamping plate 32 allows it to achieve the aforementioned detachable and replaceable function as needed, facilitating adaptation to different product specifications.

[0048] The top of the stripper rod 6 is also formed with an anti-slip block 60. An elastic element is connected between the anti-slip block 60 and the upper mold base 3 so that the end of the stripper rod 6 away from the anti-slip block 60 can be moved into the product cavity 310.

[0049] Furthermore, such as Figure 3As shown, in this embodiment, the inner ejector plate 5 has a guide hole 52 for the ejector rod 6 to be inserted movably. It is worth noting that the outer diameter of the anti-slip block 60 is larger than the inner diameter of the guide hole 52. This effectively limits the depth to which the ejector rod 6 extends into the product cavity 310, preventing excessive distance from causing positional interference with the stamping boss 70 during stamping and affecting the overall quality of the product. Simultaneously, the presence of an elastic element (not shown) allows the ejector rod 6 to be squeezed and retracted into the inner ejector plate 5 (i.e., away from the product cavity 310) during product stamping. When the upper die holder 3 moves away from the lower die holder 2, the elastic element's elastic reset drives the ejector rod 6 to extend back into the product cavity 310, achieving the ejection function. This design greatly improves ejection efficiency, reduces the need for manual intervention, and enhances overall production efficiency. It should be noted that the elastic element in this embodiment can be replaced by other elastic components such as compression springs or return springs.

[0050] In a further preferred embodiment, the upper template 31 is detachably connected to a plurality of die cutters 311 extending into the product cavity 310. These die cutters 311 are primarily for forming recessed grooves on the product, thus preventing damage to product quality due to the need for secondary machining after stamping. It should be noted that these die cutters 311 can also be replaced by screws, bolts, or other connecting components to achieve quick disassembly and replacement during stamping operations.

[0051] More preferably, such as Figure 2 and Figure 4 As shown, in this embodiment, a fixed guide sleeve 34 is also installed in the upper template 31. During the process of the upper mold base 3 approaching the lower mold base 2, the fixed guide sleeve 34 is movably sleeved on the fixed guide post 73, thereby providing guidance and positioning for the stamping of the mold mechanism, ensuring that the product cavity 310 is accurately located directly above the stamping boss 70, thus ensuring the quality of the formed product.

[0052] More preferably, such as Figure 2 and Figure 4 As shown, in this embodiment, several first limiting posts 35 are installed on the upper mold base 3, and several second limiting posts 20 are installed on the lower mold base 2. When the upper mold base 3 and the lower mold base 2 perform the mold closing action, the first limiting posts 35 and the second limiting posts 20 correspond one-to-one and move against each other to ensure that the relative positions of the upper mold base 3 and the lower mold base 2 remain consistent during each stamping. This significantly improves the stamping accuracy and ensures that the size and shape of each product meet the design requirements.

[0053] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0055] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A mold structure with quick-change punch function, used for forming desired products on a strip material, characterized in that, include: A lower mold base and an upper mold base, wherein the upper mold base is movably disposed above the lower mold base; A plurality of punches are provided in the upper die base, and a plurality of inserts are provided in each insert. At least one punch is provided in each insert. The punches can move closer to the lower die base with the upper die base to punch through holes in the product on the strip. An inner stripper plate and a stripper rod are detachably connected inside the upper mold base. The inner stripper plate movably abuts against the insert and together with the upper mold base forms a product cavity. The punch passes through the inner stripper plate and extends into the product cavity. The stripper rod extends into the product cavity and can retract into the inner stripper plate. A stamping assembly is disposed on the lower die base. A stamping boss is fixedly disposed on the stamping assembly. The stamping boss can stamp the product on the strip when the upper die base extrudes the stamping assembly. When the upper mold base is pressed against the lower mold base, the stripper rod retracts to the inner stripper plate, so that the stamping boss can stamp the product into the product cavity; The stripper rod can extend into the product cavity when the upper die holder moves away from the lower die holder, so as to pre-leave the product on the punching boss.

2. The mold structure with quick punch change function according to claim 1, characterized in that, The inner ejector plate has several connecting holes through which fasteners can pass to detachably connect the inner ejector plate to the upper mold base.

3. The mold structure with quick punch change function according to claim 1, characterized in that, The insert has a locking hole, the inner ejector plate has a limiting hole, the punch is movably inserted into the limiting hole, and connected to the upper die base through the connector in the locking hole to limit the displacement of the punch.

4. A mold structure with quick-change punch function according to claim 2, characterized in that, The punching assembly also includes a lower pad and an outer ejector plate. The lower pad is disposed on the lower die base, and fixed guide posts are symmetrically installed on the periphery of the lower pad. The outer ejector plate is sleeved on the fixed guide posts and moves above the lower pad. The punching boss is detachably connected to the middle position of the lower pad and passes through the outer ejector plate.

5. A mold structure with quick-change punch function according to claim 4, characterized in that, The lower pad is also provided with a stripping spring, the top end of which moves against the bottom wall of the outer stripping plate so that the outer stripping plate can reciprocate along the axis of the fixed guide post.

6. A mold structure with quick punch change function according to claim 4, characterized in that, The upper mold base also includes an upper template, an upper clamping plate, and an upper pad that are stacked sequentially. The inner ejector plate is disposed within the upper template and together with it forms the product cavity. The insert is disposed within the upper clamping plate and is movably connected to the upper pad.

7. A mold structure with quick-change punch function according to claim 4, characterized in that, The top of the stripper rod is also formed with an anti-slip block, and an elastic element is connected between the anti-slip block and the upper mold base so that the end of the stripper rod away from the anti-slip block can be movably extended into the product cavity.

8. A mold structure with quick-change punch function according to claim 6, characterized in that, The upper template is detachably connected to a plurality of die cutters that extend into the product cavity, and the die cutters are used to form recessed grooves on the product.

9. A mold structure with quick-change punch function according to claim 6, characterized in that, A fixed guide sleeve is installed inside the upper template, and the fixed guide sleeve is movably sleeved on the fixed guide post.

10. A mold structure with quick-change punch function according to claim 1, characterized in that, The upper mold base is equipped with a plurality of first limiting posts, and the lower mold base is equipped with a plurality of second limiting posts. The first limiting posts and the second limiting posts are arranged in a one-to-one correspondence and move against each other.

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