Bending rivet die with riveting insert delayed release structure

Abstract

The invention discloses a bending riveting die with a riveting insert delayed release structure, which comprises an upper die assembly, a lower die assembly and the delayed release structure, the lower die assembly comprises a lower die holder, a riveting insert, a sliding piece and an elastic reset piece, a product bearing table is arranged on the lower die holder, the sliding piece is slidably mounted on the lower die holder, and the elastic reset piece is arranged on the lower die holder. The sliding piece is located on one side of the product bearing table, and the riveting insert is installed on the sliding piece through the elastic reset piece. The delayed release structure comprises a limiting piece and a triggering piece, the limiting piece is movably installed on the sliding piece, the limiting piece is used for forming detachable limiting with the riveting insert so as to prevent the riveting insert from resetting, the triggering piece is installed on the lower die base, and the sliding piece is used for driving the riveting insert to move in the direction away from the product bearing table, and the triggering piece makes contact with the limiting piece. And therefore, the limiting of the riveting insert by the limiting piece is relieved. Therefore, the bending and riveting die can be matched with integrated riveting and bending machining of a product with a bent claw provided with a rivet, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of hardware processing mold technology, and in particular to a bending riveting mold with a riveting insert delayed release structure. Background Technology

[0003] In the field of hardware processing, riveting dies are the core devices for realizing the integration of the "riveting-bending" process. They can complete the processing flow of "two punches + two dies" in the traditional process by using one set of dies and two stampings of one punch press, which greatly reduces equipment investment and process flow time, while avoiding positioning errors caused by secondary clamping.

[0004] However, different riveting products have different technical defects in their corresponding riveting dies. Taking a product where the riveting part is located in the bending part (the bent claw after the product is formed) as an example, after the product is riveted, the riveted part (the product after riveting) is usually lifted by the ejector rod. The sliding component of the lower die needs to be retracted to make room for bending. However, at this time, the riveting insert is lifted by the spring, causing the rivet to remain inserted in the hole of the riveting insert. This causes the sliding component of the lower die to be stuck by the rivet and unable to retract normally. As a result, the subsequent bending process cannot be carried out smoothly, and the traditional two-step processing method can only be used, which reduces production efficiency and increases production costs. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a riveting die with a riveting insert delayed release structure, so that the riveting die can be adapted to the integrated riveting and bending processing of products with rivets on the bending claw, thereby improving production efficiency and reducing production costs.

[0007] The objective of this invention is achieved through the following technical solution: A riveting die with a delayed release structure for a riveting insert includes: an upper die assembly, a lower die assembly, and a delayed release structure. The lower die assembly includes a lower die base, a riveting insert, a sliding member, and an elastic reset member. A product support platform is provided on the lower die base. The upper die assembly is used to perform riveting and bending operations on the product on the product support platform. The sliding member is slidably mounted on the lower die base and is located on one side of the product support platform. The riveting insert is mounted on the sliding member via the elastic reset member. The delayed release structure includes a limiting member and a trigger member. The limiting member is movably mounted on the sliding member and is used to form a detachable limiting with the riveting insert to prevent the riveting insert from resetting. The trigger member is mounted on the lower die base. When the sliding member drives the riveting insert to move away from the product support platform, the trigger member contacts the limiting member to release the limiting member's restriction on the riveting insert.

[0008] In one embodiment, the limiting member includes a limiting hook and an elastic member. The riveting insert is provided with a limiting platform. The limiting hook is located on one side of the riveting insert. One end of the elastic member is connected to the sliding member, and the other end of the elastic member is connected to the limiting hook. After the product is riveted, the holding part of the limiting hook abuts against the limiting platform to prevent the riveting insert from resetting.

[0009] In one embodiment, the limiting hook has an elongated structure, a head and a tail, the thickness of the tail gradually decreases from the area near the head to the end of the tail, and the thickness of the head gradually decreases from the area near the tail to the end of the head, one end of the holding part is disposed at the end of the head of the limiting hook, and the other end of the holding part extends toward the riveting insert, and one end of the elastic member is mounted on the head of the limiting hook.

[0010] In one embodiment, the elastic element is a spring.

[0011] In one embodiment, the sliding member includes a sliding block and a sliding drive member. The sliding drive member is connected to the sliding block. The sliding block has an installation clearance cavity. The riveting insert, the elastic reset member, and the limiting member are respectively located in the installation clearance cavity. The sliding drive member is used to drive the sliding block to move towards or away from the product support platform.

[0012] In one embodiment, the trigger is a trigger post, which is mounted on the lower mold base. The bottom of the sliding block is also provided with a trigger avoidance channel, which is connected to the mounting avoidance cavity. When the sliding drive is used to drive the sliding block to move away from the product support platform, the trigger post contacts the limit hook through the trigger avoidance channel, so that the holding part of the limit hook is released from the limit plate of the riveting insert.

[0013] In one embodiment, the upper mold assembly includes an upper mold base and a riveting elbow, one end of which is mounted on the upper mold base, and the other end of which faces the lower mold assembly.

[0014] In one embodiment, the riveting insert has a riveting positioning hole. During riveting, the riveting hole on the product is aligned with the riveting positioning hole, and the rivet post on the product passes through the riveting hole and is located inside the riveting positioning hole.

[0015] In one embodiment, the product support platform is further provided with a top rod and a top rod reset component. The product support platform has a clearance hole, and the top rod and the top rod reset component are respectively housed in the clearance hole. One end of the top rod reset component is connected to the top rod, and the end of the top rod away from the top rod reset component abuts against the product.

[0016] In one embodiment, the push rod reset member is a spring.

[0017] Compared with the prior art, the present invention has at least the following advantages: The riveting mold of the present invention, featuring a delayed release structure for riveting inserts, achieves integrated riveting and bending processing of products with rivets in the bending claw by setting up a lower mold assembly, an upper mold assembly, and a delayed release structure. Specifically, a sliding member moves the riveting insert closer to or further away from the product support platform, and an elastic reset member provides reset power to the riveting insert. A limiting member in the delayed release structure temporarily locks and restricts the reset of the riveting insert, preventing the riveting insert from rising synchronously with the riveted part. After the sliding member retracts to allow bending space, the contact action between the trigger member and the limiting member releases the limiting member's locking of the riveting insert, allowing the riveting insert to reset under the action of the elastic reset member, ready for the next product riveting process. In this way, the riveting mold can be adapted to the integrated riveting and bending processing of products with rivets in the bending claw, improving production efficiency and reducing production costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below.

[0020] Figure 1 A schematic diagram of a bending and riveting die without a delayed release structure for the riveting insert. Figure 2 This is a schematic diagram of the structure of a bending riveting mold (starting riveting state) with a riveting insert delayed release structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a bent riveting mold (riveting completed state) with a riveting insert delayed release structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a bending riveting mold with a riveting insert delayed release structure (the limiting member and the trigger member are in contact) according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of a bending die (product in bending state) with a riveting insert delayed release structure according to an embodiment of the present invention; Figure 6 for Figure 2A structural diagram of the sliding component, elastic reset component, riveted insert, and delayed release structure in the diagram; Figure 7 for Figure 3 A structural diagram of the sliding component, elastic reset component, riveted insert, and delayed release structure in the diagram; Detailed Implementation

[0021] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings.

[0022] Please see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a bending and riveting die with a riveting insert 220 and a delayed release structure 300 includes: an upper die assembly 100, a lower die assembly 200, and a delayed release structure 300; the lower die assembly 200 includes a lower die base 210, a riveting insert 220, a sliding member 230, and an elastic reset member 240. A product support platform 211 is provided on the lower die base 210. The upper die assembly 100 is used to perform riveting and bending operations on the product 20 on the product support platform 211. The sliding member 230 is slidably mounted on the lower die base 210, and the sliding member 230 is located on one side of the product support platform 211. 220 is mounted on the sliding member 230 via the elastic reset member 240; the delayed release structure 300 includes a limiting member 310 and a trigger member 320. The limiting member 310 is movably mounted on the sliding member 230 and is used to form a detachable limit with the riveting insert 220 to prevent the riveting insert 220 from resetting. The trigger member 320 is mounted on the lower mold base 210. When the sliding member 230 drives the riveting insert 220 to move away from the product support platform 211, the trigger member 320 contacts the limiting member 310 to release the limiting member 310 from limiting the riveting insert 220.

[0023] It should be noted that you should refer to [link / reference]. Figure 1 As shown, this is a bending riveting die without a delayed release structure for the riveting insert. For a product 20 with rivets 21 on its bending claw, using this type of bending riveting die has the following drawbacks: First, during riveting, the riveting insert 220 needs to cooperate with the positioning riveting of the product 20. That is, during riveting, the rivet 21 is located in the positioning hole of the riveting insert 220. After riveting, the product support platform 211 lifts the riveted part (product 20 and rivet 21), and the riveting insert 220 is also lifted by the return spring. The rivet 21 on the riveted part is always inside the riveting insert 220, which will prevent the sliding part 230 from retracting to make room for bending, making it impossible to achieve subsequent bending operations. As a result, the product 20 with rivets 21 on its bending claw can only be processed in a traditional two-step manner, which results in low production efficiency and increased production costs.

[0024] Based on this, the present invention proposes a bending riveting mold with a riveting insert delayed release structure. For details, please refer to [reference needed]. Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, before riveting begins, the delayed release structure 300 does not limit the riveting insert 220. That is, under the action of the elastic reset member 240, the riveting insert 220 is in an extended state relative to the top surface of the sliding member 230. The product 20 to be riveted is placed on the product support platform 211, and the rivet head of the rivet 21 is hung in the rivet hole of the product 20, while the rivet post of the rivet 21 is located inside the riveting insert 220. Please refer to [link to relevant documentation]. Figure 3 As shown, the upper mold assembly 100 moves towards the product support platform 211 and performs riveting operation on the rivets 21 of the product 20. At this time, the riveting insert 220 and the elastic reset member 240 are compressed and retracted, causing the riveting insert 220 to retract relative to the top surface of the sliding member 230, completing the riveting. Simultaneously, the riveting insert 220 is detachably limited by the limiting member 310 (detachable limiting means that the limiting effect of the limiting member 310 on the riveting insert 220 can be released). Therefore, after the lower mold assembly 200 resets, the riveting insert 220 will not reset directly, that is, the riveting insert 220 achieves delayed reset. Thus, when the product support platform 211 lifts the product 20, the riveting insert 220 will not rise with the product 20, thereby allowing the sliding member 230 to exit smoothly. Please refer to [link to relevant documentation]. Figure 4 As shown, the sliding member 230 drives the elastic reset member 240, the riveting insert 220, and the limiting member 310 to move away from the product support platform 211, creating a bending space. During the movement, the limiting member 310 contacts the trigger member 320, thereby releasing the limiting member 310 from restricting the riveting insert 220. That is, the riveting insert 220 is released and, under the elastic force of the elastic reset member 240, returns to its initial state (returns to the state where the top surface of the riveting insert 220 protrudes relative to the sliding member 230). Please refer to [link to relevant documentation]. Figure 5 As shown, after creating the bending space, the lower die assembly 200 continues to press down, bending the product 20 to form a bent claw. This enables integrated riveting and bending operations of the product 20 with the bent claw and rivet 21, improving production efficiency and reducing production costs.

[0025] Specifically, please refer to Figure 6 and Figure 7As shown, the limiting member 310 includes a limiting hook 311 and an elastic member 312. A limiting platform 221 is provided on the riveting insert 220. The limiting hook 311 is located on one side of the riveting insert 220. One end of the elastic member 312 is connected to the sliding member 230, and the other end of the elastic member 312 is connected to the limiting hook 311. After the product 20 is riveted, the holding part 311a of the limiting hook 311 abuts against the limiting platform 221 to prevent the riveting insert 220 from resetting.

[0026] It should be noted that the limiting hook 311 is connected to the sliding member 230 through the elastic element 312, which makes the limiting hook 311 movable. After riveting is completed, the riveting insert 220 retracts under the downward pressure of the upper mold assembly 100. After the riveting insert 220 retracts, the retaining part 311a on the limiting hook 311 is locked onto the limiting platen 221 of the riveting insert 220, which is equivalent to hooking the riveting insert 220 through the limiting hook 311 and preventing riveting. The insert 220 is reset; then, as the sliding member 230 drives the riveting insert 220, the limiting hook 311, and other components to retract and create bending space, the limiting hook 311 contacts the trigger member 320. That is, the trigger member 320 causes the retaining part 311a on the limiting hook 311 to disengage from the limiting plate 221 on the riveting insert 220, achieving delayed release of the riveting insert 220. This allows the sliding member 230 to drive the riveting insert 220 to retract smoothly and create bending space. In this embodiment, the elastic member 312 is a spring. By utilizing the elastic deformation characteristics of the spring, a continuous pushing force is provided to the limiting hook 311, keeping the limiting hook 311 and the riveting insert 220 in an engaged state. When the trigger member 320 is activated, the spring acts, causing the limiting hook 311 to disengage from the limiting plate 221 on the riveting insert 220, completing the release of the riveting insert 220.

[0027] Furthermore, the limiting hook 311 has an elongated structure, with a head and a tail 311b. The thickness of the tail 311b gradually decreases from the area near the head to the end of the tail 311b, and the thickness of the head of the limiting hook 311 gradually decreases from the area near the tail 311b to the end of the head. One end of the holding part 311a is located at the end of the head of the limiting hook 311, and the other end of the holding part 311a extends toward the riveting insert 220. One end of the elastic member 312 is mounted on the head of the limiting hook 311.

[0028] It should be noted that the thickness of the tail 311b of the limiting hook 311 gradually decreases from the area near the head to the end of the tail 311b, and the thickness of the head of the limiting hook 311 gradually decreases from the area near the tail 311b to the end of the head. That is, both the head and tail 311b of the limiting hook 311 have gradually changing thicknesses, which is equivalent to making the longitudinal cross-section of the limiting hook 311 have a date-shaped structure, and the length of the tail 311b is greater than the length of the head. Simultaneously, the tail 31... The thickness of the end of 1b is less than the thickness of the end of the head; thus, the holding part 311a of the head is precisely adapted to the limiting plate 221 of the riveting insert 220, and the inclined structure formed by the tail 311b can easily generate a rotational torque when it comes into contact with the trigger 320, so as to achieve quick unlocking. That is, the limiting hook 311 rotates slightly and shakes, and the holding part 311a on it disengages from the limiting plate 221 of the riveting insert 220, so as to achieve delayed release of the riveting insert 220.

[0029] Further, please refer to Figure 6 and Figure 7 As shown, the sliding member 230 includes a sliding block 231 and a sliding drive member 232. The sliding drive member 232 is connected to the sliding block 231. The sliding block 231 has an installation clearance cavity. The riveting insert 220, the elastic reset member 240, and the limiting member 310 are respectively located in the installation clearance cavity. The sliding drive member 232 is used to drive the sliding block 231 to move closer to or away from the product carrier platform 211. The sliding block 231 is slidably mounted on the lower mold base 210. The sliding drive member 232 drives the sliding block 231 to move along a preset trajectory, so that the riveting insert 220 moves closer to or away from the product carrier platform 211. In this embodiment, the sliding drive member 232 is a drive cylinder. Further, in this embodiment, the lower mold base is also provided with a mounting plate 212. The mounting plate 212 is provided with a slide rail. The corresponding sliding block 231 has a slide groove. The slide groove cooperates with the slide rail to guide and limit the movement of the sliding block 231, ensuring the stability of the movement of the sliding block 231. Meanwhile, the trigger 320 is mounted on the mounting plate 212 so that the limiting member 310 can contact the trigger 320.

[0030] Further, please refer to Figure 6 and Figure 7 As shown, the trigger 320 is a trigger post, which is installed on the lower mold base 210. The bottom of the sliding block 231 is also provided with a trigger avoidance channel 231a, which is connected to the installation avoidance cavity. When the sliding drive 232 drives the sliding block 231 to move away from the product support platform 211, the trigger post contacts the limit hook 311 through the trigger avoidance channel 231a, so that the holding part 311a of the limit hook 311 is released from the limit hook platform 221 of the riveting insert 220.

[0031] It should be noted that when the sliding drive 232 drives the sliding block 231 to retract, the trigger post passes through the trigger avoidance channel 231a and contacts the tail 311b of the limit hook 311, pushing the limit hook 311 to rotate slightly. This causes the holding part 311a of the head of the limit hook 311 to move away from the limit table 221 of the riveting insert 220, releasing the locking and allowing the riveting insert 220 to be released and reset under the action of the reset member 240. Then, when entering the next riveting operation, the sliding drive 232 continues to drive the riveting insert 220 and the limit hook 311 to move closer to the product support table 211. At this time, the limit hook 311 disengages from the contact with the trigger post, and through the elastic member 312 connected to the limit hook 311, the limit hook 311 returns to its initial position.

[0032] It should also be noted that since the delayed release structure 300 in this invention adopts a purely mechanical structure (spring, limit hook 311 and trigger post), it can realize the delayed release of the riveting insert 220 through mechanical linkage, without the need for an additional power source, simplifying the control logic, simplifying the size of the mold, improving the timeliness and accuracy of the clamping limit and unlocking release actions, and also reducing costs.

[0033] In one implementation method, please refer to Figure 2 , Figure 3 and Figure 4 As shown, the upper mold assembly 100 includes an upper mold base 110 and a riveting elbow 120. One end of the riveting elbow 120 is mounted on the upper mold base 110, and the other end faces the lower mold assembly 200. The upper mold base 110 drives the riveting elbow 120 to move up and down. For the same product 20, during the first downward movement, the riveting elbow 120 presses the rivet 21 to complete the riveting; during the second downward movement, the forming surface of the riveting elbow 120 applies a bending force to the riveted part, thereby achieving integrated riveting and bending. In this embodiment, the upper mold base 110 includes an upper template 111 and an upper mold positioning boss 112. The upper mold positioning boss 112 is mounted on the upper mold base 110, and the riveting elbow 120 is mounted on one side of the upper mold positioning boss 112. During riveting or bending, the upper mold positioning boss 112, in conjunction with the product support platform, presses and positions the product 20, preventing the product 20 from shifting position during riveting or bending.

[0034] It should also be noted that when the product 20 has two sides for the curved claw and the riveting part, the corresponding sliding part 230, riveting insert 220, elastic reset part 240, delayed release structure 300 and riveting elbow 120 are all provided in two sets.

[0035] Further, please refer to Figure 1 , Figure 6 and Figure 7As shown, a riveting positioning hole 222 is provided on the riveting insert 220. During riveting, the riveting hole on the product 20 is aligned with the riveting positioning hole 222, and the rivet 21 on the product 20 passes through the riveting hole and is located inside the riveting positioning hole 222. By restricting the radial displacement of the rivet 21 through the riveting positioning hole 222, defects such as riveting eccentricity and deformation can be significantly reduced, the riveting strength and consistency can be improved, and the riveting quality can be enhanced.

[0036] In one embodiment, the product support platform 211 is further provided with a push rod 211a and a push rod reset member 211b. The product support platform 211 has a clearance hole, and the push rod 211a and the push rod reset member 211b are respectively housed in the clearance hole. One end of the push rod reset member 211b is connected to the push rod 211a, and the end of the push rod 211a away from the push rod reset member 211b abuts against the product 20. The push rod 211a of the product support platform 211 supports the product 20 under the action of the push rod reset member 211b. After riveting is completed, the push rod 211a is pushed upward by an external force (the return stroke of the upper mold assembly 100) to separate the riveted part from the rivet 21 and the riveting insert 220, so that the sliding member 230 can be smoothly retracted to make room for bending. In this embodiment, the ejector pin reset component 211b is a spring. The spring causes the ejector pin 211a to move downward during riveting or bending, and automatically resets and lifts the product 20 after riveting or bending is completed. This makes the ejector pin 211a react quickly without the need for a complex drive mechanism, thereby reducing mold costs.

[0037] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A bending riveting die with a riveting insert delayed release structure, characterized in that, include: Upper mold component; The lower mold assembly includes a lower mold base, a riveting insert, a sliding member, and an elastic reset member. A product support platform is provided on the lower mold base. The upper mold assembly is used to perform riveting and bending operations on the product on the product support platform. The sliding member is slidably mounted on the lower mold base and is located on one side of the product support platform. The riveting insert is mounted on the sliding member through the elastic reset member. and A delayed release structure includes a limiting member and a trigger member. The limiting member is movably mounted on the sliding member and is used to form a detachable limiting with the riveting insert to prevent the riveting insert from resetting. The trigger member is mounted on the lower mold base. When the sliding member drives the riveting insert to move away from the product support platform, the trigger member contacts the limiting member to release the limiting member's restriction on the riveting insert.

2. The bending riveting die with a delayed release structure for riveting inserts according to claim 1, characterized in that, The limiting component includes a limiting hook and an elastic component. A limiting platform is provided on the riveting insert. The limiting hook is located on one side of the riveting insert. One end of the elastic component is connected to the sliding component, and the other end of the elastic component is connected to the limiting hook. After the product is riveted, the holding part of the limiting hook abuts against the limiting platform to prevent the riveting insert from resetting.

3. The bending and riveting die with a delayed release structure for riveting inserts according to claim 2, characterized in that, The limiting hook has an elongated structure, with a head and a tail. The thickness of the tail gradually decreases from the area near the head to the end of the tail, and the thickness of the head gradually decreases from the area near the tail to the end of the head. One end of the holding part is located at the end of the head of the limiting hook, and the other end of the holding part extends towards the riveting insert. One end of the elastic member is mounted on the head of the limiting hook.

4. The bending and riveting die with a delayed release structure for riveting inserts according to claim 2, characterized in that, The elastic element is a spring.

5. The bending and riveting die with a delayed release structure for riveting inserts according to claim 3, characterized in that, The sliding component includes a sliding block and a sliding drive component. The sliding drive component is connected to the sliding block. The sliding block has an installation clearance cavity. The riveting insert, the elastic reset component, and the limiting component are respectively located in the installation clearance cavity. The sliding drive component is used to drive the sliding block to move towards or away from the product support platform.

6. The bending riveting die with a riveting insert delayed release structure according to claim 5, characterized in that, The triggering element is a triggering post, which is installed on the lower mold base. The bottom of the sliding block is also provided with a triggering avoidance channel, which is connected to the mounting avoidance cavity. When the sliding drive is used to drive the sliding block to move away from the product support platform, the triggering post contacts the limiting hook through the triggering avoidance channel, so that the holding part of the limiting hook is released from the limiting platen of the riveting insert.

7. The bending and riveting die with a delayed release structure for riveting inserts according to any one of claims 1-6, characterized in that, The upper mold assembly includes an upper mold base and a riveting elbow. One end of the riveting elbow is mounted on the upper mold base, and the other end of the riveting elbow faces the lower mold assembly.

8. The bending riveting die with a delayed release structure for riveting inserts according to claim 7, characterized in that, The riveting insert has a riveting positioning hole. During riveting, the riveting hole on the product is aligned with the riveting positioning hole, and the rivet post on the product passes through the riveting hole and is located inside the riveting positioning hole.

9. The bending riveting die with a riveting insert delayed release structure according to claim 1, characterized in that, The product support platform is also provided with a top rod and a top rod reset component. The product support platform is provided with a clearance hole. The top rod and the top rod reset component are respectively housed in the clearance hole. One end of the top rod reset component is connected to the top rod, and the end of the top rod away from the top rod reset component abuts against the product.

10. The bending riveting die with a delayed release structure for riveting inserts according to claim 9, characterized in that, The push rod reset component is a spring.

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