A modular stamping die
By using a modular stamping die with a split design and guide groove structure, the deformation problem caused by stress concentration during high-frequency stamping is solved, thereby achieving die stability and cost reduction, and ensuring product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUZHOU HUILONG MECHANICAL MOULD CO LTD
- Filing Date
- 2025-04-21
- Publication Date
- 2026-05-26
AI Technical Summary
Existing stamping dies are prone to bending and deformation during high-frequency and long-term stamping processes, especially in parts of the die with uneven thickness. This leads to product dimensional errors and shortened die life. In particular, stress concentration at the protrusions of high-strength irregular dies can easily cause die deformation and product quality problems.
The design adopts a modular stamping die, with the lower die split into two independent blocks. Stress is dispersed through the support plate and guide groove structure, and guide plates and guide pillars are added to ensure accurate positioning. The support plate and the bottom frame are an integral structure, and the guide plates in the guide groove are replaceable, realizing stress release and flexible disassembly and replacement of the die.
It effectively alleviates mold deformation, extends mold life, reduces replacement costs, and ensures product dimensional accuracy and production efficiency.
Smart Images
Figure CN224272884U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stamping die technology, and in particular to a modular stamping die. Background Technology
[0002] Stamping dies are special process equipment used in cold stamping to process materials (metal or non-metal) into parts (or semi-finished products). They are called cold stamping dies or cold stamping molds.
[0003] Stamping is a pressure processing method that uses a die mounted on a press to apply pressure to a material at room temperature, causing it to separate or plastically deform, thereby obtaining the desired part.
[0004] This stamping method has a large impact force. Generally, the upper and lower dies are pressed and squeezed to shape the material. When stamping and shaping thick metal materials, the reverse impact force is also very large, which will have a significant impact on the upper and lower stamping dies. When stamping is carried out at high frequency for a long time, it will squeeze the dies.
[0005] When stamping dies are high-strength, irregularly shaped dies, the higher parts of these dies protrude from the top of the support platform without outer frame protection. This is especially true when there are many curved surfaces, which can lead to some parts of the die being thicker than others. Over a long period of high-frequency stamping, the stress in the middle of the protrusions of the die becomes more concentrated, making this part prone to bending deformation. In particular, the high protrusions on the front and back sides of the very center of the die are very easy to bend. Once the die is deformed, the shape of the stamped product will change, and dimensional errors will occur, which is not conducive to efficient production.
[0006] Based on this, this utility model designs a modular stamping die to solve the above problems. Utility Model Content
[0007] The purpose of this invention is to provide a modular stamping die that can convert the deformable lower stamping die into a split type, avoiding the entire lower stamping die being subjected to force, thereby concentrating the stress in the gaps and releasing the stress through the gaps. This can effectively alleviate the deformation of the die caused by stamping. At the same time, the split die and base frame assembly method allows for convenient disassembly and replacement of the die, thereby reducing the replacement cost of the die. Moreover, it can be replaced on one side, making it flexible in use and easy to assemble and disassemble.
[0008] This utility model is implemented as follows: a modular stamping die, comprising:
[0009] Base frame, guide groove, support plate and lower mold;
[0010] The bottom frame is a hollow square frame, and a square slot is opened in the center of the bottom frame, with the slot opening at the top of the bottom frame;
[0011] The support plate is a flat plate, which blocks the bottom of the slot, and the bottom of the support plate is flush with the bottom of the bottom frame;
[0012] There are two support plates, which are symmetrically arranged inside the slot. Each support plate is a U-shaped groove structure with an inward opening. The two support plates do not contact each other and are on the same plane. Each support plate and the bottom frame are an integral structure.
[0013] A guide groove is opened on each of the left and right outer walls of the bottom frame, and the guide groove vertically penetrates the upper and lower surfaces of the bottom frame;
[0014] The guide groove is an outer open U-shaped groove, the guide groove is a square groove, and guide plates are also installed on the three inner surfaces of the guide groove;
[0015] The lower die is the bottom die of a stamping die. The lower die consists of two separate block structures, which are respectively installed and locked on the support plates on both sides, and the two lower dies do not contact each other.
[0016] Furthermore, the thickness of the support plate is between 1 and 5 cm;
[0017] The support plate has multiple vertical mounting holes, and the lower mold is locked to the support plate by bolts and mounting holes.
[0018] Furthermore, the guide plate is a planar bearing, and the guide plate is bolted to the vertical sidewall of the guide groove.
[0019] Furthermore, four guide posts are vertically installed at the top of the bottom frame. The four guide posts are evenly distributed in a rectangle at the four corners of the bottom frame, and the guide posts are perpendicular to the top plane of the bottom frame.
[0020] The top and bottom surfaces of the base frame are parallel.
[0021] Furthermore, vertical clearance holes are provided at the four corners of the slot, and the clearance holes penetrate the slot from top to bottom.
[0022] Furthermore, the spacing width c between the two support plates is the same as the spacing width d between the left and right lower molds, and neither the spacing width d nor c exceeds one-third of the left and right width s of the slot.
[0023] The vertical depth of the slot is greater than three-quarters of the maximum height of the lower mold.
[0024] The beneficial effects of this utility model are: 1. The lower mold of this utility model is a split type with two parts on the left and right sides. Its structure is dispersed, which also prevents stress from being concentrated on the mold. It can avoid the thinner part of the groove of the lower mold from being subjected to huge impact. The stress is released through the gap of the lower mold. At the same time, it can protect the exposed part of the protruding lower mold. In addition, the split lower mold of this device can be easily replaced after deformation. Moreover, it can be replaced on one side, which saves more costs.
[0025] 2. This device adds a square frame slot inside the base frame to accurately position the lower mold and ensure accurate installation. It also adds a support plate, which is an integral structure with the base frame. This not only reinforces the base frame but also increases the structural strength and load-bearing capacity of the base frame and support plate. The bottom of the support plate is flush with the bottom of the base frame and is directly stamped on the bearing platform. This prevents the support plate itself from deforming and only serves a positioning function, thus providing more stable support for the stamping mold.
[0026] 3. This device also adds guide grooves and guide pillars, which play a dual guiding role, ensuring the precise matching position between the upper and lower stamping dies. The larger and more stable guide grooves ensure that the stamping back force will not cause the die to shift. Moreover, the guide plates inside the guide grooves are removable and replaceable. When high-frequency stamping wears out, high-precision new guide plates can be easily replaced to ensure stamping stability. Attached Figure Description
[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0029] Figure 2 This is a schematic diagram of the bottom frame structure of this utility model;
[0030] Figure 3 This is a top view of the bottom frame structure of this utility model;
[0031] Figure 4 This is a schematic diagram of the front cross-sectional structure of the bottom frame of this utility model.
[0032] The attached diagram lists the components represented by each number as follows:
[0033] 1-Bottom frame, 11-Card slot, 12-Allowing hole, 2-Guide slot, 21-Guide piece, 22-Guide post, 3-Support plate, 31-Mounting hole, 4-Lower mold. Detailed Implementation
[0034] Please see Figures 1 to 4As shown, this utility model provides a modular stamping die. To better understand the above technical solution, the following will describe the above technical solution in detail with reference to the accompanying drawings and specific embodiments.
[0035] In a specific embodiment of the technical solution of this utility model:
[0036] Includes a base frame 1, a guide groove 2, a support plate 3, and a lower mold 4;
[0037] The bottom frame 1 is a hollow square frame, and a square slot 11 is opened in the center of the bottom frame 1. The slot 11 is open at the top of the bottom frame 1.
[0038] The support plate 3 is a flat plate, which blocks the bottom of the slot 11. The bottom of the support plate 3 is flush with the bottom of the bottom frame 1. The thickness of the support plate 3 is between 1-5cm.
[0039] Multiple mounting holes 31 are vertically formed on the support plate 3, and the lower mold 4 is locked to the support plate 3 by bolts and mounting holes 31. The support plate 3 serves to support and position the mold, and to strengthen and reduce deformation, so that the support plate 3 can transfer the impact force to the platform at the bottom.
[0040] The four corners of the locking groove 11 are also vertically provided with clearance holes 12, which run from top to bottom through the locking groove 11, so that the thickness of the locking groove 11 is completely covered by the clearance holes 12. Such clearance holes 21 facilitate the clearance of the four corners of the lower mold 4, avoiding the situation where it cannot be installed and locked. At the same time, when the lower mold 4 is impacted, the clearance holes 12 can also buffer the impact, making the bottom frame 1 less prone to impact deformation.
[0041] Meanwhile, the clearance hole 12 does not penetrate the bottom of the bottom frame 1, and the slot at the very end of the clearance hole 12 should be 0.5-1cm lower than the bottom surface of the locking slot 11.
[0042] There are two support plates 3, which are symmetrically arranged inside the slot 11. Each support plate 3 is a U-shaped groove structure with an inward opening. The two support plates 3 do not contact each other and are on the same plane. Each support plate 3 and the bottom frame 1 are integrally formed.
[0043] The spacing width c between the two support plates 3 is the same as the spacing width d between the two lower molds 4 on the left and right, and the spacing widths d and c do not exceed one-third of the width s of the slot 11 on the left and right.
[0044] The vertical depth of the slot 11 is greater than three-quarters of the maximum height of the lower mold 4.
[0045] A guide groove 2 is opened on each of the left and right outer walls of the bottom frame 1, and the guide groove 2 vertically penetrates the upper and lower surfaces of the bottom frame 1;
[0046] The guide groove 2 is an externally open U-shaped groove, and the guide groove 2 is a square groove. Guide plates 21 are installed on three sides inside the guide groove 2. The guide plates 21 are flat bearings, and are bolted to the vertical sidewalls of the guide groove 2. The guide plates 21 ensure more stable insertion of the guide rod of the upper mold. The guide rod is a matching device for the upper mold; a square vertical rod suffices. The guide rod needs to ensure accurate sliding with the guide groove 2. The flat bearing is wear-resistant, slides smoothly, facilitates guidance, and is easy to replace. Once worn, it can be replaced individually, resulting in low cost and flexibility. Four guide posts 22 are vertically installed at the top of the bottom frame 1. The four guide posts 22 are evenly distributed in a rectangular shape at the four corners of the bottom frame 1, and are perpendicular to the top plane of the bottom frame 1. Through the cooperation of the guide posts 22, the guide groove 2, and the guide rod of the upper mold, the guidance is more accurate. The upper mold is a conventional structure of a stamping die, a well-known technical structure in the art, and this device does not modify the upper mold.
[0047] The top and bottom surfaces of the base frame 1 are parallel, and the top plane of the base frame 1 is also parallel to the top plane of the support plate 3; this ensures accurate positioning of the impact surface and accurate dimensions of the impact-formed product.
[0048] The lower die 4 is the bottom die of the stamping die. The lower die 4 consists of two separate block structures. The two lower dies 4 are respectively installed and locked on the support plates 3 on both sides. The two lower dies 4 do not contact each other, and the tops of the two lower dies 4 protrude above the bottom frame 1.
[0049] It should be noted that a stamping die consists of two parts: a raised, solid metal block (usually the upper die) and a concave die. The upper die, in conjunction with the convex die, deforms the material by stamping, shaping the sheet metal into the specific shape of the product. This deformation is achieved through stamping with the complete upper die, which is typically a solid convex block. The lower die is concave. Since the convex block is a solid structure that cannot deform, the deformation usually occurs on the concave surface of the lower die. This can lead to dimensional abnormalities and quality issues in the product, requiring the entire die set to be replaced. Die costs are very high, and the cost of each die set must be factored into the product price. The cost of a die set that can produce 10,000 products can differ by a factor of 10 from that that can produce 1,000 products.
[0050] 1. This device utilizes a split lower mold 4 to change the stress distribution, making the lower mold less prone to deformation due to stress concentration, thus extending the mold's service life and effectively reducing production costs. This is especially true for high-strength irregular molds, where the lower mold 4 protrudes from the top. When connected as a whole, although the shape is precise, the weak middle part is very easy to deform. However, due to the limitation of installation space, high-strength molds cannot be too thick. Even with thicker molds, stress concentration can easily lead to deformation under heavy stamping. This device disperses this stress, effectively extending the service life of the lower mold 4.
[0051] 2. This device has only two lower molds 4. Even if deformation occurs, only one mold needs to be replaced, which also achieves the purpose of reducing costs and increasing efficiency.
[0052] 3. The support plate 3 of this device is used to support the lower mold, which can accurately position and support the left and right molds, and bear the load together, so that the mold remains stable when subjected to impact.
[0053] 4. The cooperation between the guide groove 2 and the guide plate 21 of this device can ensure that the upper mold can be stably guided when the stamping machine is impacting and forming the mold. In addition, the guide column 22 is added for double positioning to ensure stable position and accurate shape and size of the stamped product.
[0054] In use, the upper mold of this utility model is a single piece of metal with a downward convex structure.
[0055] The upper die impacts the lower die 4 downwards, while the stamping material is on top of the lower die 4. The material is stamped and deformed by the upper and lower dies.
[0056] The stamped sheet metal product will deform towards the center, and the stress will be concentrated in the gap between the lower dies 4 on the left and right sides. This effectively prevents the lower dies 4 from bearing all the stamping pressure, thereby reducing the stamping pressure on the lower dies 4, extending the service life of the lower dies 4, and reducing the frequency of replacement.
[0057] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.
Claims
1. A modular stamping die characterized by, include: The base frame (1), guide groove (2), support plate (3), and lower mold (4) are all components of the mold. The bottom frame (1) is a hollow square frame, and a square slot (11) is opened at the center of the bottom frame (1). The slot (11) is open at the top of the bottom frame (1). The support plate (3) is a flat plate, the support plate (3) blocks the bottom of the slot (11), and the bottom of the support plate (3) is flush with the bottom of the bottom frame (1); The support plate (3) has two pieces, and the two support plates (3) are symmetrically arranged inside the slot (11). Each support plate (3) is a U-shaped groove structure with an inward opening. The two support plates (3) do not contact each other, and the two support plates (3) are on the same plane. Each support plate (3) and the bottom frame (1) are an integral structure. A guide groove (2) is opened on each of the left and right outer walls of the bottom frame (1), and the guide groove (2) vertically penetrates the upper and lower surfaces of the bottom frame (1); The guide groove (2) is an outer open U-shaped groove, the guide groove (2) is a square groove, and guide plates (21) are also installed on the three inner surfaces of the guide groove (2); The lower mold (4) is the bottom mold of the stamping die. The lower mold (4) consists of two separate block structures. The two lower molds (4) are respectively installed and locked on the support plates (3) on both sides. The two lower molds (4) do not contact each other.
2. A modular stamping die according to claim 1, wherein: The thickness of the support plate (3) is between 1 and 5 cm; The support plate (3) has multiple vertical mounting holes (31), and the lower mold (4) is locked to the support plate (3) by bolts and mounting holes (31).
3. A modular stamping die according to claim 1, wherein: The guide plate (21) is a plane bearing, and the guide plate (21) is locked to the vertical side wall of the guide groove (2) by bolts.
4. A modular stamping die according to claim 1, wherein: Four guide posts (22) are vertically installed at the top of the bottom frame (1). The four guide posts (22) are evenly distributed in a rectangle at the four corners of the bottom frame (1). The guide posts (22) are perpendicular to the top plane of the bottom frame (1). The top and bottom surfaces of the bottom frame (1) are parallel.
5. A modular stamping die according to claim 1, wherein: The four corners of the slot (11) are also provided with vertical clearance holes (12), which pass through the slot (11) from top to bottom.
6. A modular stamping die according to claim 1, wherein: The spacing width c between the two support plates (3) is the same as the spacing width d between the two lower molds (4) on the left and right, and the spacing widths d and c do not exceed one-third of the width s of the slot (11) on the left and right. The vertical depth of the slot (11) is greater than three-quarters of the maximum height of the lower mold (4).