High-precision automobile cover stamping die

Abstract

The utility model discloses a high-precision stamping die for an automobile cover, which belongs to the technical field of stamping dies for automobile covers and comprises a stamping seat and an electric push rod, the electric push rod is fixedly mounted at the top of the stamping seat, an upper die is arranged at the bottom of the electric push rod, and a lower die is fixedly mounted on one side of the stamping seat. And the stamping protection mechanism used for conducting protective connection on the electric push rod and the upper die is arranged on the outer side of the upper die. In this way, the stamping protection mechanism is arranged between the output end of the electric push rod and the upper die, and buffering and anti-impact protection of the connecting part are achieved. The protection assembly is of a multi-layer composite structure and can absorb impact loads and inertia force in the stamping process, relieve stress concentration, prolong the service life of the connector and improve the connection stability. And the disassembly assembly installed on the outer side can achieve rapid assembly and disassembly of the upper die, and the replacement efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive hood stamping die technology, specifically to a high-precision automotive hood stamping die. Background Technology

[0002] Stamping dies are special process equipment used in cold stamping to process metal or non-metal materials into parts or semi-finished products. They are commonly known as cold stamping dies. Stamping is a pressure processing method that uses dies mounted on a press to apply pressure to materials at room temperature, causing them to separate or undergo plastic deformation, thereby obtaining the desired parts.

[0003] As shown in the reference case "A High-Precision Automobile Engine Cover Stamping Die" (Announcement No. CN217252108U), by setting a fixing rod and a spring, and using the alternating installation of fixing plate one and fixing plate two, the upper die is fixed by the cooperation of the fixing rod and fixing hole. By utilizing the elasticity of spring one and the action of the sliding rod, when the upper die becomes loose, the sliding rod is moved to release the fixation of the upper die, thus facilitating timely replacement of the upper die.

[0004] While existing technologies have improved mold replacement efficiency, they have not fundamentally solved the problem of fatigue failure at mold connection points. During high-frequency stamping, the connection structure of the mold is subjected to impact loads and inertial transmission forces for extended periods. Without buffering and shock-absorbing structures, it is highly susceptible to loosening, wear, or even cracking at the interface, ultimately affecting the working accuracy and service life of the mold, and increasing maintenance frequency and repair costs.

[0005] Based on this, this utility model designs a high-precision automotive hood stamping die to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a high-precision automotive hood stamping die.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A high-precision automotive hood stamping die includes a stamping base and an electric push rod. The electric push rod is fixedly mounted on the top of the stamping base, and an upper die is provided at the bottom of the electric push rod. A lower die is fixedly mounted on one side of the stamping base. A stamping protection mechanism is provided on the outside of the upper die to protect the connection between the electric push rod and the upper die. The stamping protection mechanism includes a mounting frame fixedly mounted on the output end of the electric push rod. The mounting frame is located on the outside of the upper die, and a protective component is provided between the mounting frame and the upper die. A disassembly component is provided on the outside of the mounting frame.

[0009] Furthermore, the protective assembly includes two first metal support plates fixedly installed on the top wall of the mounting frame, and rubber connecting frames are fixedly installed at the bottom of the two first metal support plates, with the upper mold located at the bottom of the two rubber connecting frames.

[0010] Furthermore, a second metal support plate is fixedly installed at the bottom of the rubber connecting frame. Both the first and second metal support plates are T-shaped, and buffer pads are fixedly installed on both sides of the inner side of the mounting frame.

[0011] Furthermore, the rubber connecting frame is configured in an H-shape, with the adjacent sides of the first metal support plate and the second metal support plate extending into the interior of the rubber connecting frame.

[0012] Furthermore, two floating joints are fixedly installed at the bottom of each of the two second metal support plates, and the floating joints are in contact with the upper mold.

[0013] Furthermore, a mating joint is fixedly installed at the bottom of the floating joint, and multiple mating holes are opened at the top of the upper mold, with the multiple mating joints slidingly connected to the multiple mating holes respectively.

[0014] Furthermore, the disassembly assembly includes connecting blocks fixedly installed on both sides of the upper mold. The two connecting blocks are slidably connected to both sides of the mounting frame. Guide clamps are fixedly installed on both sides of the mounting frame. A connecting rod is provided inside the guide clamp. Both ends of the connecting rod pass through the adjacent connecting blocks. Two limiting rings are threadedly connected to the surface of the connecting rod, and the two limiting rings are located on the side of the two connecting blocks on the same side that are far apart from each other.

[0015] Furthermore, a contact pad is fixedly installed on the inner side of the guide clamp, and the contact pad is in contact with the surface of the connecting rod. Beneficial effects

[0016] A stamping protection mechanism is installed between the output end of the electric push rod and the upper die to provide buffering and impact protection for the connection. The protection component is a multi-layered composite structure that can absorb impact loads and inertial forces during stamping, reduce stress concentration, extend interface life, and improve connection stability. The disassembly component installed on the outside allows for quick loading and unloading of the upper die, improving replacement efficiency.

[0017] The contact pad maintains close contact with the surface of the connecting rod. After the connecting rod is inserted and assembled, the contact pad can form a flexible support area on its surface, which can provide effective lateral restraint and friction buffering during the operation of the connecting rod. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional view of the main structure of a high-precision automobile hood stamping die according to the present invention.

[0020] Figure 2 This is a schematic diagram of the stamping protection mechanism of a high-precision automobile hood stamping die according to the present invention.

[0021] Figure 3 This is a schematic diagram of the protective component structure of a high-precision automobile hood stamping die according to the present invention.

[0022] Figure 4 This is a schematic diagram of the disassembly assembly structure of a high-precision automotive hood stamping die body according to the present invention.

[0023] The labels in the diagram represent:

[0024] 100. Stamping base; 110. Electric push rod; 200. Upper die; 210. Lower die; 300. Stamping protection mechanism; 310. Mounting frame; 320. Protective component; 321. First metal support plate; 322. Rubber connecting frame; 323. Second metal support plate; 324. Floating joint; 325. Buffer pad; 326. Butt joint; 327. Butt hole; 330. Disassembly component; 331. Connecting block; 332. Guide clamp; 333. Connecting rod; 334. Limiting ring; 335. Contact pad. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] The present invention will be further described below with reference to the embodiments.

[0027] In some embodiments, please refer to the appendix to the instruction manual. Figure 1-4A high-precision automotive hood stamping die includes a stamping base 100 and an electric push rod 110. The electric push rod 110 is fixedly mounted on the top of the stamping base 100, and an upper die 200 is provided at the bottom of the electric push rod 110. A lower die 210 is fixedly mounted on one side of the stamping base 100. A stamping protection mechanism 300 is provided on the outside of the upper die 200 to protect the connection between the electric push rod 110 and the upper die 200. The stamping protection mechanism 300 includes a mounting frame 310 fixedly mounted on the output end of the electric push rod 110. The mounting frame 310 is located on the outside of the upper die 200, and a protective component 320 is provided between the mounting frame 310 and the upper die 200. A disassembly component 330 is provided on the outside of the mounting frame 310.

[0028] In one embodiment of this utility model, a stamping protection mechanism 300 is provided between the output end of the electric push rod 110 and the upper mold 200, which realizes structural buffering and impact protection of the connection part. The protection component 320 is a multi-layer composite structure, which can effectively absorb the impact load and inertial force transmitted to the upper mold 200 during the stamping process, reduce stress concentration, delay interface fatigue failure, and significantly improve the durability and stability of the mold connection part. The disassembly component 330 is located on the outside of the mounting frame 310, which can realize the quick loading and unloading operation of the upper mold 200.

[0029] It should be noted that the existing stamping die structure typically includes a stamping base 100 fixed on the stamping equipment, an electric or hydraulic drive device, an upper die 200 and a lower die 210 for applying pressure, and is widely used in the sheet metal forming process of automobile hoods. The protective component 320 is located between the output end of the electric push rod 110 and the upper die 200, serving as a structural buffer layer to absorb impact force. It does not interfere with the axial movement and pressure transmission process of the electric push rod 110 and the die, nor does it affect the die's centering accuracy and rigidity transmission performance. The disassembly component 330 is located on the outside of the mounting frame 310, forming a quick-release connection structure with the upper die 200. Without affecting the die's movement path, it enables the upper die 200 to be quickly locked and released, does not affect the die's pressing action, does not change the die's force path, and does not interfere with the normal stamping process.

[0030] In some embodiments, such as Figure 2 , Figure 3 and Figure 4 As shown, in a preferred embodiment of the present invention, the protective component 320 includes two first metal support plates 321 fixedly installed on the top wall of the mounting frame 310. A rubber connecting frame 322 is fixedly installed at the bottom of each of the two first metal support plates 321, and the upper mold 200 is located at the bottom of the two rubber connecting frames 322.

[0031] In one embodiment of this utility model, the first metal support plate 321 and the rubber connecting frame 322 cooperate to allow the rubber connecting frame 322 to undergo limited elastic compression during axial force application when the electric push rod 110 presses down to drive the upper mold 200 for stamping. This absorbs impact energy and buffers load transmission. The first metal support plate 321 provides a rigid support surface, ensuring the uniformity of force distribution and guiding stability of the rubber connecting frame 322 during the pressing process.

[0032] A second metal support plate 323 is fixedly installed at the bottom of the rubber connecting frame 322. Both the first metal support plate 321 and the second metal support plate 323 are T-shaped. Buffer pads 325 are fixedly installed on both sides of the inside of the mounting frame 310.

[0033] In one embodiment of this utility model, a stable three-layer composite protective structure is formed by the first metal support plate 321, the rubber connecting frame 322, and the second metal support plate 323. When the electric push rod 110 drives the upper mold 200 to perform a stamping motion, the structure can achieve upper and lower clamping and covering at the moment of force, and generate elastic deformation through the middle rubber layer, which plays an effective role in impact absorption and load buffering. The rubber connecting frame 322, as the middle buffer core layer, works between the upper and lower metal plates and can repeatedly absorb impact energy during the stamping motion, reducing the instantaneous stress at the mold connection.

[0034] The rubber connecting frame 322 is configured in an H-shape, with the first metal support plate 321 and the second metal support plate 323 extending into the interior of the rubber connecting frame 322 on adjacent sides.

[0035] In one embodiment of this utility model, the rubber connecting frame 322 is configured as an H-shaped structure with symmetrical clamping channels at the top and bottom. The first metal support plate 321 and the second metal support plate 323 are respectively embedded in the upper and lower parts of the rubber connecting frame 322, so that the three form a stable nested composite connection relationship, preventing excessive expansion or instability when under pressure. On the other hand, it also enhances the overall compressive strength and shear resistance of the connection part.

[0036] It should be noted that the first metal support plate 321 and the second metal support plate 323 are made of high-strength structural steel, spring steel, or surface-treated alloy steel plate. These materials have good tensile strength, fatigue resistance, and impact toughness, and can provide stable structural support and rigid restraint under high-frequency stamping loads. The rubber connecting frame 322 is made of high-resilience rubber, nitrile rubber, or neoprene rubber. These rubbers have good elastic deformation capacity, energy absorption capacity, and high-frequency fatigue resistance, and can compress and absorb the impact load from the electric push rod 110 during the stamping process. It quickly recovers its shape after unloading, preventing the connecting parts from being fatigued by direct impact. The rubber material also has a certain damping performance, which can effectively suppress the high-frequency vibration generated during the stamping process and slow down the transmission of vibration to the mold structure or drive system. By clamping the rubber connecting frame 322 between the upper and lower metal support plates, a rigid-to-flexible-to-rigid composite structure is formed. It not only uses the metal plate to provide rigid support and structural constraints, but also uses the middle rubber layer to achieve elastic compression buffer in the vertical direction and deformation absorption and limiting in the horizontal direction, so as to achieve flexible coupling and impact isolation under high-frequency stamping conditions.

[0037] Two floating joints 324 are fixedly installed at the bottom of each of the two second metal support plates 323, and the floating joints 324 are in contact with the upper mold 200.

[0038] In one embodiment of this utility model, the floating joint 324 is used to contact the upper mold 200 and form a flexible connection fulcrum. During the stamping operation, the floating joint 324 can ensure load transmission while allowing the upper mold 200 to automatically adjust within a small angle range, effectively absorbing the connection stress caused by centering error, off-center load or structural deformation, thereby improving the stability and service life of the connection system.

[0039] It should be noted that the floating joint 324 adopts a spherical structure or a universal linkage structure. One end of it is fixedly connected to the second metal support plate 323 through threads or positioning pins, and the other end is in contact with the upper mold 200. The floating joint 324 has a certain self-aligning capability, which can automatically adapt to the slight changes in the mold posture during the up and down movement of the mold, maintain the uniform fit of the contact surface, and effectively prevent the mold from tilting, misaligning or being subjected to excessive local stress.

[0040] The bottom of the floating joint 324 is fixedly installed with a mating joint 326, and the top of the upper mold 200 is provided with multiple mating holes 327. The multiple mating joints 326 are slidably connected to the multiple mating holes 327 respectively.

[0041] In one embodiment of this utility model, by inserting the connector 326 into the mating hole 327, the upper mold 200 can be quickly positioned and reliably connected in the vertical direction, and the mold alignment can be completed without using threaded fasteners.

[0042] In some embodiments, such as Figure 2 and Figure 4 As shown, in a preferred embodiment of the present invention, the disassembly assembly 330 includes connecting blocks 331 fixedly installed on both sides of the upper mold 200. The two connecting blocks 331 are slidably connected to both sides of the mounting frame 310. Guide clamps 332 are fixedly installed on both sides of the mounting frame 310. A connecting rod 333 is provided inside the guide clamp 332. Both ends of the connecting rod 333 pass through the adjacent connecting blocks 331. Two limiting rings 334 are threadedly connected to the surface of the connecting rod 333, and the two limiting rings 334 are located on the side of the two connecting blocks 331 on the same side that are far apart from each other.

[0043] In one embodiment of this utility model, when installing the upper mold 200, the two connecting blocks 331 located on both sides are first moved to the corresponding positions of the mounting frame 310, so that they are aligned and connected with the guide plates 332 on both sides. Then, the connecting rod 333 passes through the guide plates 332 and the two adjacent connecting blocks 331 in sequence, thereby constructing a through-type locking connection structure on both sides. After installation, the connecting rod 333 is fixed by threads through the limiting rings 334 located at both ends of the surface of the connecting rod 333. The limiting rings 334 are respectively located on the side of the two connecting blocks 331 that are far apart from each other, and are used to limit the outer thrust of the connecting blocks 331 to prevent the connecting blocks 331 from axial displacement or loosening during operation, thus ensuring connection stability and safety of use.

[0044] A contact pad 335 is fixedly installed on the inner side of the guide plate 332, and the contact pad 335 is in contact with the surface of the connecting rod 333.

[0045] In one embodiment of this invention, the contact pad 335 maintains close contact with the surface of the connecting rod 333. After the connecting rod 333 is inserted and assembled, the contact pad 335 forms a flexible support area on its surface. This structure provides effective lateral restraint and friction buffering during the operation of the connecting rod 333, preventing the connecting rod 333 from experiencing minor swaying, slippage, or wear due to direct metal-to-metal contact under high-frequency stamping or vibration loads.

[0046] In this embodiment of the invention, during use, the electric push rod 110 drives the mounting frame 310 to press down vertically, and the impact force is transmitted to the upper mold 200 through the protective component 320. The protective component 320 consists of a three-layer composite structure composed of a first metal support plate 321, a rubber connecting frame 322, and a second metal support plate 323. The rubber connecting frame 322 undergoes elastic deformation under pressure to absorb impact loads and achieve shock absorption. The upper and lower metal support plates provide guidance and support to ensure uniform load transmission. A floating joint 324 is provided below the second metal support plate 323, which can achieve automatic self-alignment during the mold pressing and docking process. The joint 326 slides to connect with the docking hole 327 on the top of the upper mold 200 to complete the rapid positioning and connection of the mold, avoid stress concentration, and improve assembly efficiency. After the mold is positioned, the operator connects the connecting block 331 and the guide clamp 332 through the connecting rod 333, and locks it on the outside using the limiting ring 334 to ensure reliable mold fixation. The contact pad 335 inside the guide plate 332 provides flexible support and vibration damping guidance for the connecting rod 333, effectively preventing loosening or wear caused by high-frequency impact, and improving connection stability and repeated service life.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-precision automotive hood stamping die, comprising a stamping base (100) and an electric push rod (110), characterized in that: An electric push rod (110) is fixedly installed on the top of the stamping base (100), an upper mold (200) is provided at the bottom of the electric push rod (110), and a lower mold (210) is fixedly installed on one side of the stamping base (100). A stamping protection mechanism (300) is provided on the outside of the upper die (200) for protecting the connection between the electric push rod (110) and the upper die (200). The stamping protection mechanism (300) includes a mounting frame (310) fixedly installed at the output end of the electric push rod (110). The mounting frame (310) is located outside the upper mold (200), and a protective component (320) is provided between the mounting frame (310) and the upper mold (200). A disassembly component (330) is provided outside the mounting frame (310).

2. The high-precision automotive hood stamping die according to claim 1, characterized in that, The protective component (320) includes two first metal support plates (321) fixedly installed on the top wall inside the mounting frame (310). A rubber connecting frame (322) is fixedly installed at the bottom of each of the two first metal support plates (321). The upper mold (200) is located at the bottom of the two rubber connecting frames (322).

3. The high-precision automotive hood stamping die according to claim 2, characterized in that, The bottom of the rubber connecting frame (322) is fixedly installed with a second metal support plate (323). The first metal support plate (321) and the second metal support plate (323) are both set in a T-shape. The inner sides of the mounting frame (310) are fixedly installed with buffer pads (325).

4. The high-precision automotive hood stamping die according to claim 2, characterized in that, The rubber connecting frame (322) is configured in an H-shape, with the first metal support plate (321) and the second metal support plate (323) extending into the interior of the rubber connecting frame (322) on adjacent sides.

5. The high-precision automotive hood stamping die according to claim 3, characterized in that, Two floating joints (324) are fixedly installed at the bottom of each of the two second metal support plates (323), and the floating joints (324) are in contact with the upper mold (200).

6. The high-precision automotive hood stamping die according to claim 5, characterized in that, The bottom of the floating joint (324) is fixedly installed with a mating joint (326), and the top of the upper mold (200) is provided with multiple mating holes (327). The multiple mating joints (326) are slidably connected to the multiple mating holes (327) respectively.

7. The high-precision automotive hood stamping die according to claim 1, characterized in that, The disassembly assembly (330) includes connecting blocks (331) fixedly installed on both sides of the upper mold (200). The two connecting blocks (331) are slidably connected to both sides of the mounting frame (310). Guide clamps (332) are fixedly installed on both sides of the mounting frame (310). A connecting rod (333) is provided inside the guide clamp (332). Both ends of the connecting rod (333) pass through the adjacent connecting blocks (331). Two limiting rings (334) are threadedly connected to the surface of the connecting rod (333), and the two limiting rings (334) are located on the side of the two connecting blocks (331) on the same side that are far apart from each other.

8. The high-precision automotive hood stamping die according to claim 7, characterized in that, A contact pad (335) is fixedly installed on the inner side of the guide clamp (332), and the contact pad (335) is in contact with the surface of the connecting rod (333).

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