A blank holder structure of a stamping die for a crash beam support
By using multiple concave arc-shaped pre-compression components and a micro-protrusion array in the stamping die of the anti-collision beam bracket, the problem of accurate pre-compression on complex-shaped brackets in traditional dies is solved, thereby improving the forming accuracy and quality of the stamped parts.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUANCHENG HONGRUI MACHINERY MFG
- Filing Date
- 2025-07-08
- Publication Date
- 2026-06-23
Smart Images
Figure CN224389774U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive parts stamping die technology, specifically, it relates to the pressing structure of a stamping die for a crash beam bracket. Background Technology
[0002] With the rapid development of the global automotive industry, consumers have increasingly stringent requirements for vehicle safety performance. As a key structural component in a vehicle's passive safety system, the manufacturing precision and strength of the crash beam bracket directly affect the vehicle's energy absorption effect and occupant protection in a collision. Crash beam brackets, such as... Figure 2 As shown, this is a key connecting component between the car's anti-collision beam and the front bulkhead of the vehicle body structure. It is typically stamped from high-strength steel sheet, possessing a specific shape and structure. In the event of a collision, it effectively transfers the impact energy absorbed by the anti-collision beam to the main structure, such as the longitudinal beams of the vehicle body, and helps disperse energy, reducing deformation of the passenger compartment and protecting the occupants. The stamping die for the anti-collision beam bracket is a specialized mold system used to stamp metal sheets into the complex three-dimensional shape required for the anti-collision beam bracket.
[0003] Metal materials undergo both elastic and plastic deformation during the stamping process. When the punch descends and breaks the material, the stamped portion is subjected to compression and stretching. Once the punch leaves, the elastic stress within the material is released, causing it to spring back upwards. The presence of a blank holder structure ensures the material remains tightly fitted within the stamping area, reducing upward twisting or tearing during the stamping process, resulting in a smoother, less burr-prone cross-section. This is crucial for improving the quality of the bracket and reducing subsequent finishing processes. Because automotive crash beam brackets have complex shapes, traditional blank holder structures are typically flat or simple curved surfaces. Therefore, it is difficult to precisely pre-press complex-shaped crash beam brackets locally. Ineffective local compression of complex shapes leads to irregular material flow, stretching, springback, or displacement during stamping, resulting in significant deviations between the final stamped part's dimensions and the design values, particularly for critical dimensions such as hole positions, edge contours, and bending angles. Utility Model Content
[0004] In view of this, the present invention provides a pressing structure for a stamping die of a crash beam bracket, which can solve the problem that traditional stamping dies for crash beam brackets cannot accurately perform local pre-pressing.
[0005] This utility model is implemented as follows:
[0006] This utility model provides a pressing structure for a stamping die of a crash beam bracket, including a pressing structure body, a pre-pressing component, a slide groove, a connecting plate, and a compression spring. The pressing structure body is fixedly connected to the lower bottom surface of the upper die base and moves with the moving direction of the upper die base. A slide groove is provided inside the pressing structure body, and the slide groove is distributed along the stamping direction. A compression spring is provided in the slide groove, and one end of the compression spring abuts against the inner wall of the end of the slide groove. One end of the connecting plate is fixedly connected to the other end of the compression spring and slidably connected to the slide groove. The other end of the connecting plate is fixedly connected to the pre-pressing component. Multiple pre-pressing components are provided, with one pre-pressing component corresponding to one connecting plate. The cross-section of the shape formed by the pre-pressing component and the connecting plate is T-shaped. The lower bottom surface of the pre-pressing component is a concave arc-shaped surface adapted to the profile of the crash beam bracket to achieve more precise local pre-pressing.
[0007] The technical advantages of the blanking structure of the stamping die for a crash beam bracket provided by this utility model are as follows: 1. Traditional blanking structures are usually planar or simple curved surfaces, making it difficult to accurately pre-press the complex-shaped crash beam bracket. By setting multiple concave arc-shaped pre-pressing parts that adapt to the profile of the crash beam bracket, local fitting pre-pressing can be performed according to the complex curved surface of the bracket, avoiding wrinkles or deformation of the material due to uneven force in the early stage of stamping.
[0008] 2. Precise local preloading can effectively suppress the springback and deformation of materials during subsequent stamping processes, and can significantly improve the forming accuracy and quality stability of the final product.
[0009] 3. The profile of the anti-collision beam support usually has complex curvature changes, which are difficult to fully accommodate with a single pre-stressing component. The design of multiple concave arc-shaped pre-stressing components allows the pressure structure to better "wrap" the complex profile of the pre-stressing support, which is especially beneficial for reducing stamping defects caused by the complex shape.
[0010] Based on the above technical solution, the blanking structure of the stamping die for the anti-collision beam bracket of this utility model can be further improved as follows:
[0011] The concave arc surface of the pre-stressed component extends along the stamping direction, and its curvature matches the surface curvature of the anti-collision beam bracket in that direction.
[0012] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by ensuring that the concave arc surface of the pre-stressed part extends along the stamping direction and its curvature precisely matches the curvature of the anti-collision beam bracket surface, the maximum area contact between the pre-stressed part and the workpiece in the critical direction is achieved. The precisely matched curvature allows the pre-stressed part to more tightly "hug" the material of the anti-collision beam bracket, thereby effectively suppressing the elastic rebound of the material in the early stage of stamping deformation.
[0013] Furthermore, a micro-protrusion array is provided on the concave arc surface of the pre-compressed part. The protrusion array is used to form a local high-pressure area during pre-compressing, thereby effectively suppressing the springback of the material and improving the forming accuracy.
[0014] The beneficial effects of adopting the above-mentioned improved scheme are as follows: Traditional preloading is usually applied uniformly, which has limited effect on some easily springback anti-collision beam support materials (such as high-strength steel). By setting a micro-protrusion array on the concave arc surface, local high-pressure points can be formed during preloading. These high-pressure points can more effectively apply plastic deformation to the material beyond the yield limit, thereby "locking" the material shape, greatly suppressing the elastic rebound of the material after unloading, and improving the forming accuracy.
[0015] Furthermore, the bottom surface of the preloaded component is a segmented concave arc shape to adapt to the complex surface changes in different areas of the anti-collision beam support.
[0016] The beneficial effects of adopting the above-mentioned improved scheme are as follows: Surface: Anti-collision beam supports often have highly complex geometric shapes, which may include various surface types such as straight segments, large-curvature arc segments, and small-curvature arc segments. Traditional single arc surfaces or integral arc surfaces are difficult to perfectly fit. Using segmented concave arc surfaces means that each "segment" can independently design its curvature and shape, thereby achieving the highest precision fitting and pre-compression for each area of the anti-collision beam support.
[0017] Furthermore, the connection between the preloaded component and the connecting plate is a gradual transition.
[0018] The beneficial effects of adopting the above-mentioned improvement scheme are: the gradual transition is used to reduce stress concentration at the connection, improve the fatigue life of the structure, and ensure the smooth transmission of preload.
[0019] Furthermore, the ratio of the width of the pre-stressing component to the width of the connecting plate is 1.618:1.
[0020] Furthermore, the distribution of the preloaded components conforms to the golden spiral.
[0021] The beneficial effects of adopting the above-mentioned improved scheme are as follows: This arrangement can better adapt to nonlinear or curved material flow paths, reduce local stress concentration, and provide a more uniform preload effect. It avoids stress peaks or troughs that may result from simple equidistant arrangements, making the preload stress more evenly distributed throughout the preload area. Through more precise preload control, it provides a more ideal initial state for the final forming stage, reducing deformation and defects in the final part.
[0022] Compared with the prior art, the beneficial effects of the blanking structure of the stamping die for the anti-collision beam bracket provided by this utility model are:
[0023] 1. Traditional pressing structures are usually flat or have simple curved surfaces, making it difficult to perform precise local pre-compression on complex-shaped anti-collision beam supports. By setting multiple concave arc-shaped pre-compression components that adapt to the shape of the anti-collision beam support, local pre-compression can be performed according to the complex curved surface of the support, avoiding wrinkles or deformation of the material due to uneven stress in the early stage of stamping.
[0024] 2. Precise local preloading can effectively suppress the springback and deformation of materials during subsequent stamping processes, and can significantly improve the forming accuracy and quality stability of the final product.
[0025] 3. The profile of the anti-collision beam support usually has complex curvature changes, which are difficult to fully accommodate with a single pre-stressing component. The design of multiple concave arc-shaped pre-stressing components allows the pressure structure to better "wrap" the complex profile of the pre-stressing support, which is especially beneficial for reducing stamping defects caused by the complex shape. Attached Figure Description
[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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.
[0027] Figure 1 This is a schematic diagram of the blanking structure of a stamping die for a crash beam bracket;
[0028] Figure 2 This is a schematic diagram of the anti-collision beam support;
[0029] The attached diagram lists the components represented by each number as follows:
[0030] 10. Pressing structure body; 20. Pre-pressing component; 30. Slide groove; 40. Connecting plate; 50. Compression spring. Detailed Implementation
[0031] 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.
[0032] like Figure 1The image shows an embodiment of the pressing structure of a stamping die for a crash beam bracket provided by this utility model. In this embodiment, it includes a pressing structure body 10, a pre-pressing component 20, a slide groove 30, a connecting plate 40, and a compression spring 50. The pressing structure body 10 is fixedly connected to the lower bottom surface of the upper die base and moves with the moving direction of the upper die base. A slide groove 30 is provided inside the pressing structure body 10, and the slide groove 30 is distributed along the stamping direction. A compression spring 50 is provided in the slide groove 30, and one end of the compression spring 50... The connecting plate 40 is fixedly connected to the other end of the compression spring 50 and slidably connected to the slide 30, and the other end of the connecting plate 40 is fixedly connected to the pre-compression member 20. Multiple pre-compression members 20 are provided, with one pre-compression member 20 corresponding to one connecting plate 40. The cross-section of the figure formed by the pre-compression member 20 and the connecting plate 40 is T-shaped. The bottom surface of the pre-compression member 20 is a concave arc-shaped surface that adapts to the profile of the anti-collision beam bracket to achieve more precise local pre-compression.
[0033] In the above technical solution, the concave arc-shaped surface of the pre-stressing component 20 extends along the stamping direction, and its curvature matches the surface curvature of the anti-collision beam bracket in that direction.
[0034] Furthermore, in the above technical solution, a micro-protrusion array is provided on the concave arc-shaped surface of the pre-compression component 20. The protrusion array is used to form a local high-pressure area during pre-compression, thereby effectively suppressing the springback of the material and improving the forming accuracy.
[0035] Furthermore, in the above technical solution, the bottom surface of the pre-compression component 20 is a segmented concave arc surface, which adapts to the complex surface changes in different areas of the anti-collision beam support.
[0036] Furthermore, in the above technical solution, the connection between the pre-compression component 20 and the connecting plate 40 is a gradual transition.
[0037] Furthermore, in the above technical solution, the ratio of the width of the pre-compression component 20 to the width of the connecting plate 40 is 1.618:1.
[0038] Furthermore, in the above technical solution, the distribution of the pre-compression component 20 conforms to the golden spiral.
[0039] During operation, the upper die base moves during the stamping process, causing the pressure plate structure to move as well. The pre-pressing component on the pressure plate structure first contacts and pre-presses the corresponding position of the anti-collision beam bracket, plastically deforming the material to make it fit the die better. After pre-pressing, the pressure plate structure continues to move, compressing the compression spring 50 and causing the connecting plate 40 to slide in the slide groove 30. As the upper and lower die bases approach each other, the elastic potential energy of the spring increases, resulting in a stronger pressing force on the anti-collision beam bracket.
[0040] Specifically, the principle of this invention is as follows: a pressure structure is designed with multiple pre-compression components inside. The shape and position of these pre-compression components are precisely matched to the curved surface of the anti-collision beam bracket, thereby achieving local pre-compression of different areas. The key is that each pre-compression component acts independently on a specific area of the anti-collision beam bracket, unlike traditional planar pressure structures which act as a whole, allowing for more precise control of material deformation.
[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A pressing structure for a stamping die of a crash beam bracket, comprising a pressing structure body (10), a pre-pressing component (20), a slide groove (30), a connecting plate (40), and a compression spring (50), wherein the pressing structure body (10) is fixedly connected to the lower bottom surface of an upper die holder and moves with the moving direction of the upper die holder, the pressing structure body (10) is provided with a slide groove (30) inside, the slide groove (30) is distributed along the stamping direction, a compression spring (50) is provided in the slide groove (30), one end of the compression spring (50) abuts against the inner wall of the end of the slide groove (30), one end of the connecting plate (40) is fixedly connected to the other end of the compression spring (50) and slidably connected to the slide groove (30), and the other end of the connecting plate (40) is fixedly connected to the pre-pressing component (20), characterized in that, Multiple pre-compression components (20) are provided. One pre-compression component (20) corresponds to one connecting plate (40). The cross section of the graphic formed by the pre-compression component (20) and the connecting plate (40) is T-shaped. The bottom surface of the pre-compression component (20) is a concave arc-shaped surface that adapts to the profile of the anti-collision beam support, so as to achieve more precise local pre-compression.
2. The blanking structure of the stamping die for a crash beam bracket according to claim 1, characterized in that, The concave arc surface of the pre-stressed part (20) extends along the stamping direction, and its curvature matches the surface curvature of the anti-collision beam bracket in that direction.
3. The blanking structure of the stamping die for a crash beam bracket according to claim 2, characterized in that, The concave arc surface of the pre-pressed part (20) is provided with a micro-protrusion array. The protrusion array is used to form a local high pressure area during pre-pressing, thereby effectively suppressing the springback of the material and improving the forming accuracy.
4. The blanking structure of the stamping die for a crash beam bracket according to claim 3, characterized in that, The bottom surface of the pre-stressed component (20) is a segmented concave arc surface, which adapts to the complex surface changes in different areas of the anti-collision beam support.
5. The blanking structure of the stamping die for a crash beam bracket according to claim 4, characterized in that, The connection between the pre-compression component (20) and the connecting plate (40) is a gradual transition.
6. The blanking structure of the stamping die for a crash beam bracket according to claim 5, characterized in that, The ratio of the width of the pre-compression component (20) to the width of the connecting plate (40) is 1.618:
1.
7. The blanking structure of the stamping die for a crash beam bracket according to claim 6, characterized in that, The distribution of the pre-compression component (20) conforms to the golden spiral.