A continuous stamping die applied to large hardware

Abstract

The application relates to the technical field of hardware production, and discloses a continuous stamping die applied to large hardware, which comprises an upper die mechanism and a lower die mechanism. The upper die mechanism comprises a fixed part and a bending stamping part, one end of the bending stamping part is connected with the fixed part; the lower die mechanism comprises a material ejection part, the material ejection part is arranged opposite to the bending stamping part; the material ejection part comprises a material ejection body and a plurality of elastic pieces, the elastic pieces are connected to the lower end of the material ejection body; one side of the material ejection body close to the product bending part is provided with a bending groove, and the bending stamping part is arranged above the bending groove; wherein, when the product is ejected after being bent, the bending groove is used for ejecting the bottom end of the product bending part out of the lower die mechanism. The material ejection part with the bending groove is matched with the bending stamping part, the bottom end of the product bending part is contacted and ejected in a large area by the bending groove when the product is ejected, and the advantages of avoiding stress concentration to cause product deformation and appearance defects and improving the ejection stability are achieved.

Description

Technical Field

[0001] This application belongs to the field of hardware manufacturing technology, specifically relating to a continuous stamping die for large hardware parts. Background Technology

[0002] In the hardware mold manufacturing industry, as downstream industries continuously increase their demands for efficient and large-scale component production, efficient and continuous production models have become the core direction of industry development. Continuous dies, due to their multi-process integration characteristics, can integrate punching, bending, forming, and blanking processes into multiple stations on the same die, enabling continuous conveying and step-by-step processing of metal sheets. This eliminates the need for frequent die changes or manual intervention in intermediate processes, significantly improving production efficiency. Therefore, they are gradually replacing traditional engineering dies and becoming the mainstream choice for mass production of hardware parts.

[0003] In recent years, this substitution trend has further extended to the field of large-volume hardware products such as chassis, bottom shells, and top covers. These products were previously mostly produced using engineering molds, but engineering molds require multiple processing steps and rely on manual material handling and positioning, which is not only inefficient but also prone to positioning errors due to mold changes during multiple processes. In contrast, progressive dies complete all processes with a single set of molds, which reduces the number of molds and mold change costs, and ensures product dimensional consistency through precise material feeding, meeting the needs of large-scale production of large hardware products.

[0004] However, due to the structural characteristics of large hardware products, such as chassis, bottom shells, and top covers, these products generally have high bending heights to meet assembly and structural strength requirements. This results in a significant increase in the material removal resistance at the bending station during continuous stamping.

[0005] In existing progressive die stripping structures, such as Figure 1 Round ejector pins are the most widely used basic type. Their advantage lies in achieving stable ejection in low-resistance ejection scenarios for common small and medium-sized hardware parts, such as gaskets and small springs. Therefore, they have long been widely used in various general progressive dies. However, for large, high-bending products such as chassis and bottom shells, the ejection area of ​​a round ejector pin is only a circular cross-section, resulting in a small contact area with the product's bending area. In high-resistance ejection scenarios, this easily leads to localized stress concentration at the contact point. On the one hand, this leaves obvious ejection marks on the product surface, affecting appearance quality; on the other hand, excessive localized stress can cause plastic deformation in the bending area, resulting in defective products. More importantly, excessive bending height leads to frequent ejection difficulties, directly hindering the continuous conveying of sheet metal. Utility Model Content

[0006] To address the shortcomings of the prior art, this application provides a continuous stamping die for large hardware parts. Through the design of the ejector component, it has the advantages of avoiding deformation and appearance defects in the bending area of ​​the product and improving the stability of material removal.

[0007] The technical effects to be achieved in this application are realized through the following aspects: This application provides a progressive stamping die for large hardware parts, comprising: The upper die mechanism includes a fixing component and a bending stamping component, one end of which is connected to the fixing component. The lower die mechanism includes an ejector component, which is disposed opposite to the bending stamping part; the ejector component includes an ejector body and a plurality of elastic elements, which are connected to the lower end of the ejector body; the ejector body is provided with a bending groove on the side near the bending point of the product, and the bending stamping part is disposed above the bending groove; Specifically, when the product is ejected after bending, the bending groove is used to eject the bottom end of the product from the lower mold mechanism.

[0008] In some implementations, the bending groove is an arc-shaped bending groove.

[0009] In some implementations, the top material component further includes a pressure receiving member connected above the top material body, and a downward pressing groove is formed between the edge of the pressure receiving member and the edge of the top material body.

[0010] In some implementations, the top material component further includes a bending insert, which is located on the side of the top material component near the bending groove.

[0011] In some implementations, the top material component further includes a pressure block insert, which is located on the side of the top material component away from the bending groove, and the top material body is located between the pressure block insert and the bending insert.

[0012] In some implementations, there are 2 to 5 elastic elements.

[0013] In some implementations, the lower end of the bent stamping part is provided with a stamping surface, which is inclined from the end away from the product bending point to the end near the product bending point toward the upper die mechanism.

[0014] In some implementations, the angle α between the stamping surface and the horizontal section is any value between 1° and 8°.

[0015] In some implementations, the upper die mechanism further includes a movable component and an elastic component, one end of the elastic component is connected to the fixed component, the other end of the elastic component is connected to the movable component, and the bending stamping part passes through the movable component; When the elastic component is in a free state, the bending stamping part is disposed within the movable component; When the elastic member is in a compressed state, the bent stamping part protrudes from the movable member.

[0016] In some implementations, the fixing component includes an upper support plate, an upper pad, an upper mold base, and an upper clamping plate connected sequentially from top to bottom, with the upper clamping plate positioned opposite to the movable component.

[0017] In summary, this application has at least the following advantages: The material provided in this application, by setting an ejector component with a bending groove to cooperate with the bending stamping part, utilizes the bending groove to make large-area contact with the bottom of the product bending point during ejection, which has the advantages of avoiding stress concentration that leads to product deformation and appearance defects, and improving the stability of material removal. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the existing technology.

[0019] Figure 2 This is a schematic diagram of the continuous stamping die in Embodiment 1 of this application.

[0020] Figure 3 This is a partially enlarged structural diagram of the continuous stamping die in Embodiment 2 of this application.

[0021] Figure 4 This is a schematic diagram of the upper mold mechanism in Embodiment 3 of this application.

[0022] Marked in the image: 1. Upper die mechanism; 11. Fixed component; 111. Upper support plate; 112. Upper pad block; 113. Upper die base; 114. Upper clamping plate; 12. Bending and stamping part; 121. Stamping surface; 13. Moving component; 2. Lower die mechanism; 21. Ejector component; 211. Ejector body; 212. Several elastic components; 213. Bending groove; 214. Pressure-bearing component; 215. Lower pressing movable groove; 22. Bending insert; 23. Pressure block insert; 3. Round ejector pin; 4. Product. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of this application, not all embodiments.

[0024] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0025] Example 1: Please see the appendix Figure 2 The continuous stamping die of this application for large hardware parts includes an upper die mechanism 1 and a lower die mechanism 2. The upper die mechanism 1 includes a fixed component 11 and a bending stamping component 12, one end of which is connected to the fixed component 11. The lower die mechanism 2 includes an ejector component 21, which is disposed opposite to the bending stamping component 12. The ejector component 21 includes an ejector body 211 and several elastic components 212, which are connected to the lower end of the ejector body 211. A bending groove 213 is provided on the side of the ejector body 211 near the bending point of the product 4, and the bending stamping component 12 is disposed above the bending groove 213. When the product 4 is ejected after bending, the bending groove 213 is used to eject the bottom end of the product 4 from the lower die mechanism 2.

[0026] The ejector body 211 is a rigid structure that supports the elastic element and provides the ejection contact surface. Its bending groove 213 area matches the shape of the bottom of the product's 4-bend to increase the contact area. The elastic element is a buffer component that provides the ejection restoring force; it can be implemented using a helical spring or a nitrogen spring. In this embodiment of the continuous stamping die, after the bending stamping part 12 moves downward to complete the bending and forming of product 4 during the stamping process, the ejector body 211 is ejected upward under the action of the elastic element. The bending groove 213 is completely in contact with the bottom of the bent product 4, distributing the ejection force evenly across the entire contact surface and avoiding local stress concentration. The vertically corresponding layout of the bending stamping part 12 and the bending groove 213 ensures that the ejection direction is consistent with the axis of the bending area, preventing secondary deformation caused by ejection deviation. During the ejection process, the elastic element absorbs part of the stripping resistance through compression deformation, reducing the instantaneous impact force between the ejector body 211 and product 4.

[0027] By forming a surface contact ejection through the aforementioned bending groove 213, the contact area can be increased to several times that of the original structure, significantly reducing the stress per unit area. Furthermore, the bottom of the product 4 is ejected through the bending groove 213 for material removal, ensuring that the product 4 is completely ejected. At the same time, through elastic buffering and precise ejection path design, the smoothness of the material removal action during continuous stamping is ensured, avoiding production interruptions caused by poor material removal, ensuring a stable material removal trajectory, effectively guaranteeing the appearance quality of the product 4, and ensuring the continuity of the production of the product 4.

[0028] Example 2: The difference between this embodiment and Embodiment 1 is that, please refer to... Figure 3 In this embodiment, the bending groove 213 is an arc-shaped bending groove 213. The radius of curvature of the arc-shaped bending groove 213 can be matched according to the actual dimensions of the bending point of product 4, specifically using a circular arc or elliptical arc geometric contour. This design effectively avoids the bending path of product 4 during the bending process, ensuring the smoothness of the bending. Simultaneously, using the bending groove 213 to eject the bottom of the bending point of product 4 effectively ejects product 4, ensuring the smoothness of the unloading process and guaranteeing stable conveying of the sheet metal during continuous stamping.

[0029] In some embodiments, the ejector component 21 further includes a pressure receiving component 214, which is connected above the ejector body 211, and a downward pressing groove 215 is formed between the edge of the pressure receiving component 214 and the edge of the ejector body 211. Specifically, during the stamping process, the upper die component first presses down the pressure receiving component 214, causing the ejector body 211 to press down. When the bending stamping part 12 enters the downward pressing groove 215, the product 4 is bent. This arrangement ensures the smooth operation of the bending stamping part 12 in bending the product 4.

[0030] In some embodiments, the ejector component 21 further includes a bending insert 22, which is disposed on the side of the ejector component 21 near the bending groove 213. The bending insert 22 is an auxiliary structural component that directly contacts the bending area of ​​the product 4. Specifically, during ejection, the bending insert 22 and the bending groove 213 work together on the bending area of ​​the product 4. The block-like structure of the bending insert 22 covers the edge area of ​​the bending portion of the product 4, extending the ejection force from the bending groove 213 to the area covered by the bending insert 22, forming a surface-contact ejection mode. During stripping, the bending area of ​​the product 4 is simultaneously supported by the arcuate shape of the bending groove 213 and the lateral support of the bending insert 22, significantly increasing the contact area compared to traditional point-shaped ejector pins. The surface shape of the bending insert 22 matches the geometric features of the bending portion of the product 4, guiding the product 4 to detach from the lower die mechanism 2 in a predetermined direction during ejection, avoiding plastic deformation due to localized stress concentration.

[0031] The above-mentioned design effectively disperses the localized stress generated during the ejection process, preventing the formation of mold marks on the surface of product 4 and reducing the risk of plastic deformation caused by stress concentration. The block-shaped support structure of the bending insert 22 provides stable guidance for the ejection of the high-bending product 4, ensuring smooth ejection during continuous material conveying. In some embodiments, the top material component 21 further includes a pressure block insert 23, which is located on the side of the top material component 21 away from the bending groove 213, and the top material body 211 is located between the pressure block insert 23 and the bending insert 22.

[0032] Specifically, during the ejection process, when the elastic element drives the ejector body 211 upward, the pressure block insert 23 and the bending insert 22 apply opposing restraining forces to the ejector body 211 from both sides. The pressure block insert 23 counteracts the displacement tendency of the ejector body 211 in the direction away from the bending groove 213 through rigid contact, while the bending insert 22 restricts the offset of the ejector body 211 in the direction of the bending groove 213. The clamping action from both sides keeps the ejector body 211 in a linear motion trajectory in the vertical direction, avoiding tilting or lateral displacement due to unilateral force. The bidirectional restraint on the ejector body 211 ensures that when it ejects the product at the 4th bend, the reaction force is evenly distributed to the supporting structures on both sides, eliminating local stress concentration.

[0033] Through the above technical solutions, this application effectively prevents the ejector body 211 from shifting laterally during the ejection process, avoiding deformation of the bending area of ​​the product 4 caused by the tilting of the ejector; the bidirectional clamping structure disperses the ejector reaction force, reducing mold defects caused by local stress concentration on the surface of the product 4; at the same time, it ensures the vertical movement of the ejector body 211, improves the stability of the unloading action, and ensures smooth conveying of the sheet metal during continuous stamping.

[0034] In some embodiments, 2-5 elastic elements are provided. Specifically, when two elastic elements are symmetrically arranged below the ejector body 211, a stable two-point support structure can be formed, keeping the ejector body 211 horizontal during ejection and preventing the product's four-bend area from shifting due to uneven force. When the number of elastic elements increases to five, a multi-point support array can be formed at the bottom of the ejector body 211, further expanding the distribution area of ​​the ejection force. This range of numbers, through the coordinated deformation of the elastic elements, disperses the ejection resistance originally concentrated on a single ejector pin to multiple support points, effectively reducing the stress intensity per unit area at the four-bend of the product, thereby avoiding surface indentation and plastic deformation. While ensuring the stability of mold operation, a uniform distribution of ejection force in the bending area is achieved.

[0035] In some embodiments, the lower end of the bent stamping part 12 is provided with a stamping surface 121, which is inclined from the end away from the bending point of the product 4 to the end near the bending point of the product 4 towards the upper die mechanism 1. Specifically, the inclined structure of the stamping surface 121 first contacts the far end of the workpiece in the initial contact stage, and as the stamping stroke advances, the contact area extends towards the root of the bend along the inclined direction. This dynamic contact process makes the stress intensity per unit area gradually decrease, effectively avoiding the stress peak caused by traditional point contact.

[0036] Through the above settings, a gradient release of stamping contact stress is achieved, eliminating local stress concentration during material removal in high-bending areas and preventing ejection marks on the surface of product 4. The design of the inclined structure of stamping surface 121 and the adaptability of the material springback characteristics ensures the smoothness of the demolding process for high-bending workpieces and effectively prevents the occurrence of plastic deformation defects in the bending area.

[0037] In some embodiments, the angle α between the stamping surface 121 and the horizontal section is any value between 1° and 8°. This solution limits the range of the inclination angle of the stamping surface 121, so that the material is gradually stressed during the bending process, which not only disperses the stress distribution, but also effectively ensures the bending quality, the stability of the continuous stamping process, and the product yield.

[0038] Example 3: The difference between this embodiment and Embodiment 1 is that, please refer to... Figure 4 The upper mold mechanism 1 in this embodiment also includes a movable component 13 and an elastic component. One end of the elastic component is connected to the fixed component 11, and the other end of the elastic component is connected to the movable component 13. The bending stamping component 12 passes through the movable component 13. When the elastic component is in a free state, the bending stamping component 12 is disposed inside the movable component 13. When the elastic component is in a compressed state, the bending stamping component 12 protrudes from the movable component 13.

[0039] In this embodiment, during the stamping process, when the elastic component is not compressed, the movable component 13 is in its initial position, and the bent stamping part 12 is completely housed inside the movable component 13, avoiding contact with the unstamped sheet metal. When the upper die mechanism 1 presses down, the elastic component abuts against the pressure-bearing component 214 and enters a compressed state. The movable component 13 drives the bent stamping part 12 to move downward, causing it to protrude from the movable component 13 and perform a bending action. After stamping is completed, the elastic component recovers its deformation, the movable component 13 springs back to its initial position, and the bent stamping part 12 retracts accordingly. By dynamically adjusting the protrusion of the stamping part, it is ensured that it quickly detaches from the product 4 after the bending action is completed, reducing stripping resistance. The buffering effect of the elastic component further suppresses vibration and impact during the stamping process, improving the stability of the die operation.

[0040] In some embodiments, the fixing component 11 includes an upper support plate 111, an upper pad block 112, an upper mold base 113 and an upper clamping plate 114 connected sequentially from top to bottom, with the upper clamping plate 114 disposed opposite to the movable component 13.

[0041] Specifically, the upper support plate 111, upper pad 112, upper die base 113, and upper clamping plate 114 are bolted together to form a longitudinally stacked structure, with locating pins used between each layer for precise alignment. The upper support plate 111, as the basic support layer, is fixedly connected to the punch press slide block by high-strength bolts, evenly transmitting the punching force to the lower structure. The upper pad 112 is selected with different thicknesses according to the die closing height requirements, and the overall assembly height is adjusted by increasing or decreasing the number of pads. The upper die base 113 has guide post mounting holes inside, forming a sliding fit with the guide sleeve of the lower die mechanism 2, ensuring coaxiality when the upper and lower dies are closed. The bottom surface of the upper clamping plate 114 is machined with a flatness of 0.02 mm, forming a surface contact with the top surface of the moving part 13, guiding the moving part 13 to move vertically during the compression of the elastic part. Through the above arrangement, its layered fixing structure increases the overall rigidity of the upper die mechanism 1, reduces positional deviations caused by vibration, and thus ensures the quality of the product's 4-fold bending.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] In this application, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" a first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] Although the description of this application has been made in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A progressive stamping die for large hardware parts, characterized in that, include: The upper die mechanism (1) includes a fixing component (11) and a bending stamping component (12), one end of which is connected to the fixing component (11), and The lower die mechanism (2) includes an ejector component (21), which is disposed opposite to the bending stamping part (12); the ejector component (21) includes an ejector body (211) and a plurality of elastic members (212), which are connected to the lower end of the ejector body (211); the ejector body (211) has a bending groove (213) on the side near the bending point of the product (4), and the bending stamping part (12) is disposed above the bending groove (213); When the product (4) is ejected after bending, the bending groove (213) is used to eject the bottom end of the product (4) from the lower mold mechanism (2).

2. The continuous stamping die for large hardware parts according to claim 1, characterized in that, The bending groove (213) is an arc-shaped bending groove (213).

3. The continuous stamping die for large hardware parts according to claim 1, characterized in that, The top material component (21) also includes a pressure receiving component (214), which is connected above the top material body (211), and a downward pressing groove (215) is formed between the edge of the pressure receiving component (214) and the edge of the top material body (211).

4. The continuous stamping die for large hardware parts according to claim 1, characterized in that, The top material component (21) also includes a bending insert (22), which is located on the side of the top material component (21) near the bending groove (213).

5. The continuous stamping die for large hardware parts according to claim 4, characterized in that, The top material component (21) also includes a pressing block insert (23), which is located on the side of the top material component (21) away from the bending groove (213), and the top material body (211) is located between the pressing block insert (23) and the bending insert (22).

6. The continuous stamping die for large hardware parts according to claim 1, characterized in that, The elastic element is provided in 2-5 parts.

7. The continuous stamping die for large hardware parts according to claim 1, characterized in that, The lower end of the bent stamping part (12) is provided with a stamping surface (121), which is inclined from one end away from the bending point of the product (4) to the other end near the bending point of the product (4) toward the upper mold mechanism (1).

8. The continuous stamping die for large hardware parts according to claim 7, characterized in that, The angle α between the stamping surface (121) and the horizontal section is any value between 1° and 8°.

9. The continuous stamping die for large hardware parts according to claim 1, characterized in that, The upper die mechanism (1) also includes a movable part (13) and an elastic part. One end of the elastic part is connected to the fixed part (11), and the other end of the elastic part is connected to the movable part (13). The bending stamping part (12) passes through the movable part (13). When the elastic component is in a free state, the bending stamping part (12) is disposed inside the movable component (13); When the elastic member is in a compressed state, the bent stamping part (12) protrudes from the movable part (13).

10. The continuous stamping die for large hardware parts according to claim 9, characterized in that, The fixed component (11) includes an upper support plate (111), an upper pad block (112), an upper mold base (113), and an upper clamping plate (114) connected from top to bottom. The upper clamping plate (114) is arranged opposite to the movable component (13).

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