A high-strength automotive sunroof sheet metal stamping part

Abstract

This utility model discloses a high-strength automotive sunroof sheet metal stamping part, relating to the field of automotive parts technology. It includes a base plate and a middle plate. The upper surface of the base plate is integrally stamped with the middle plate, and the upper surface of the middle plate is integrally stamped with the upper plate. Several mounting holes are stamped at the outer edges of the base plate, middle plate, and upper plate. This high-strength automotive sunroof sheet metal stamping part adopts an integrated stamping structure for the base plate, middle plate, and upper plate. Through a stepped strength distribution, combined with the hexagonal honeycomb reinforcing plate of the middle plate, it reduces material usage while improving bending stiffness and impact resistance. The honeycomb structure can evenly distribute the load, avoiding cracking or deformation caused by localized stress concentration. The isosceles trapezoidal cross-section reinforcing rib grid layout of the upper plate further enhances surface stiffness, effectively resisting wind pressure, falling rock impacts, and vibration fatigue during driving, extending the sunroof's service life and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically a high-strength automotive sunroof sheet metal stamping part. Background Technology

[0002] With the rapid development of the automotive industry, sunroofs have become a standard feature in many car models. They not only improve driving comfort but also enhance the vehicle's aesthetics and market competitiveness. As a key basic component of the sunroof structure, the performance of the sunroof sheet metal stamping parts directly affects the sunroof's service life, safety, and sealing effect.

[0003] However, existing high-strength automotive sunroof sheet metal stamping parts still have certain problems:

[0004] For example, an energy-saving automotive stamping part, as described in application number CN202121893368.7, includes a stamping part body. Mounting blocks are provided on both sides of the stamping part body, and slots are opened on both sides. A groove is opened on the side of the mounting block closest to the stamping part body. A limiting plate is provided in the groove. One end of the limiting plate extends to the outside of the groove, and the other end of the limiting plate is connected to the inner wall of one side of the groove by several compression springs. A rectangular hole is opened on the top inner wall of the groove. A push plate is fixedly connected to the top of the limiting plate. The top of the push plate passes through the rectangular hole and extends above the mounting block. Two support baffles are provided on the sides of the two push plates that are far apart.

[0005] Existing automotive sunroof sheet metal stamping parts mostly adopt a single-layer sheet metal structure. A single-layer sheet metal structure is difficult to balance lightweight and impact resistance, and is prone to cracking or springback due to stress concentration during the stamping process. At the same time, the sealing design is mostly a single-layer structure, which is sensitive to assembly tolerances and is prone to water leakage and air leakage due to uneven gaps.

[0006] Therefore, we propose a high-strength automotive sunroof sheet metal stamping part to solve the problems mentioned above. Utility Model Content

[0007] The purpose of this utility model is to provide a high-strength automotive sunroof sheet metal stamping part, in order to solve the problems mentioned in the background art, which mostly adopt a single-layer sheet metal structure for automotive sunroof sheet metal stamping parts. The single-layer sheet metal structure is difficult to balance lightweight and impact resistance, and is prone to cracking or springback due to stress concentration during the stamping process. At the same time, the sealing design is mostly a single-layer structure, which is sensitive to assembly tolerances and is prone to problems such as water seepage and air leakage due to uneven gaps.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a high-strength automotive sunroof sheet metal stamping part, comprising a base plate and a middle plate.

[0009] The upper surface of the base plate is integrally stamped with a middle plate, and the upper surface of the middle plate is integrally stamped with an upper plate. Several mounting holes are stamped on the outer edges of the base plate, the middle plate, and the upper plate, and the mounting holes are arranged in a rectangular pattern. An elastic positioning boss is provided around the mounting holes at the bottom of the base plate. A sealing groove is provided at the bottom edge of the base plate, and the center of the sealing groove is filled with a first sealing strip and a second sealing strip.

[0010] The above technical solution adopts an integrated stamping structure of base plate, middle plate and top plate. The overall strength is improved by stacking multiple plates. The mounting holes are arranged in a rectangular pattern to ensure installation stability. The elastic positioning boss assists in positioning and installation, improving assembly accuracy. The sealing groove at the bottom edge is filled with double sealing strips to enhance sealing performance and effectively prevent rainwater, dust and other substances from seeping into the vehicle, thereby improving the sealing reliability and service life of the sunroof.

[0011] Preferably, the middle layer plate includes a hollow cavity in its middle, and the middle part of the hollow cavity is integrally stamped with a plurality of reinforcing plates, and the reinforcing plates adopt a hexagonal honeycomb cell structure.

[0012] By adopting the above technical solution, the middle layer plate reduces the overall weight by opening hollow cavities, thus achieving lightweighting. At the same time, the reinforcing plate with hexagonal honeycomb cell structure forms a stable support frame in the hollow area. The mechanical properties of the honeycomb structure are used to disperse stress, improve bending stiffness and load-bearing capacity, and take into account both lightweight and high strength requirements. The regular arrangement of hexagonal cells can evenly distribute impact loads, avoid local stress concentration, and effectively suppress stamping deformation and fatigue damage during long-term use.

[0013] Preferably, the upper surface of the upper plate is integrally stamped with a first reinforcing rib and a second reinforcing rib, and the first reinforcing rib and the second reinforcing rib are arranged in a grid pattern with vertical and horizontal orientations, and the cross-section of the first reinforcing rib and the second reinforcing rib is an isosceles trapezoidal structure.

[0014] Using the above technical solution, the upper plate forms a rigid frame through the first and second reinforcing ribs arranged in a grid pattern. The isosceles trapezoidal cross section increases the structural moment of inertia, effectively dispersing the load borne by the skylight, suppressing local deformation, and improving impact and bending resistance. The inclined side of the trapezoidal ribs disperses stress concentration, while the grid layout optimizes the load transfer path. Under the premise of lightweighting, the overall rigidity of the skylight is significantly enhanced, ensuring structural stability during long-term use.

[0015] Preferably, the sealing groove adopts a double-layer stepped structure, and the thickness of the first sealing strip is slightly greater than the thickness of the second sealing strip.

[0016] Using the above technical solution, the sealing groove adopts a double-layer stepped structure to form a two-level sealing barrier. The first sealing strip serves as the main sealing layer, bearing the main pressure and compensating for larger gaps. The second sealing strip serves as an auxiliary layer, further filling the fine gaps to achieve graded sealing. The sealing redundancy is optimized by thickness difference. The thicker sealing strip deforms first to absorb tolerances, while the thinner sealing strip enhances local fit, effectively improving the waterproof and dustproof performance of the sunroof edge, while reducing the risk of sealing failure due to assembly errors.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The base plate, middle plate and top plate adopt an integrated stamping structure. Through the stepped strength distribution, combined with the hexagonal honeycomb reinforcement plate of the middle plate, the bending stiffness and impact resistance are improved while reducing the amount of material used. The honeycomb structure can evenly distribute the load and avoid cracking or deformation caused by local stress concentration. The isosceles trapezoidal cross-section reinforcement mesh layout of the top plate further enhances the surface stiffness, effectively resisting wind pressure, falling rock impact and vibration fatigue during driving, extending the service life of the sunroof and reducing maintenance costs.

[0019] 2. The double-layer stepped sealing groove and the double sealing strip with thickness difference design form a graded sealing system. The main sealing layer first absorbs assembly tolerances and compensates for large gaps, while the secondary sealing layer fills in the tiny gaps, raising the sunroof's waterproof and dustproof rating to IP67 standard. This effectively prevents rainwater leakage and dust intrusion. The flexible positioning boss and the rectangular mounting holes work together to achieve high-precision positioning of the sunroof and the vehicle body, reducing the risk of abnormal noise, loosening or sealing failure caused by assembly errors. At the same time, it improves assembly efficiency and adapts to the needs of automated production lines. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of this utility model from the front view;

[0021] Figure 2 This is a schematic diagram of the bottom structure of the main body of this utility model;

[0022] Figure 3 This is a schematic diagram of the stress dispersion structure of the middle layer plate of this utility model;

[0023] Figure 4 This is a schematic diagram of the edge sealing structure of the base plate of this utility model.

[0024] In the diagram: 1. Base plate; 2. Middle plate; 201. Hollow cavity; 202. Reinforcing plate; 3. Top plate; 301. First reinforcing rib; 302. Second reinforcing rib; 4. Mounting hole; 5. Elastic positioning boss; 6. Sealing groove; 7. First sealing strip; 8. Second sealing strip. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Please see Figures 1-4 This utility model provides a technical solution: a high-strength automotive sunroof sheet metal stamping part, including a base plate 1 and a middle plate 2. The upper surface of the base plate 1 is integrally stamped with the middle plate 2, and the upper surface of the middle plate 2 is integrally stamped with the upper plate 3. Several mounting holes 4 are stamped at the outer edges of the base plate 1, middle plate 2, and upper plate 3, and the mounting holes 4 are arranged in a rectangular pattern. Elastic positioning bosses 5 are provided around the mounting holes 4 at the bottom of the base plate 1. A sealing groove 6 is formed at the bottom edge of the base plate 1, and a first sealing strip 7 and a second sealing strip 8 are filled in the center of the sealing groove 6. The middle plate 2 includes a hollow cavity 201 in its center, and several reinforcing plates 202 are integrally stamped in the center of the hollow cavity 201, and the reinforcing plates 202 adopt a hexagonal honeycomb cell structure. The upper surface of the upper plate 3 is integrally stamped with a first reinforcing rib 301 and a second reinforcing rib 302, which are arranged in a grid pattern with vertical and horizontal orientations. The cross-sections of the first reinforcing rib 301 and the second reinforcing rib 302 are isosceles trapezoidal structures. The sealing groove 6 adopts a double-layer stepped structure, and the thickness of the first sealing strip 7 is slightly greater than the thickness of the second sealing strip 8.

[0027] The base plate 1, middle plate 2, and upper plate 3 are integrally stamped to form a stepped strength distribution. Rectangular mounting holes 4 along the outer edge, combined with elastic positioning bosses 5 at the bottom of the base plate 1, ensure assembly accuracy and anti-loosening capability. The hollow cavity 201 of the middle plate 2, reinforced by hexagonal honeycomb reinforcing plates 202, disperses stress while reducing weight, improves bending stiffness, avoids localized stress concentration, and effectively suppresses stamping deformation and fatigue damage during long-term use. The isosceles trapezoidal cross-section of the upper plate 3, with its first and second reinforcing ribs 301 and 302 arranged in a grid pattern, further enhances the surface impact resistance. The base plate... The bottom double-layer stepped sealing groove 6 is filled with a first sealing strip 7 and a second sealing strip 8 with a thickness difference design. The first sealing strip 7 serves as the main sealing layer, bearing the main pressure and compensating for larger gaps. The second sealing strip 8 serves as an auxiliary layer, further filling the fine gaps to achieve graded sealing. The thickness difference optimizes the sealing redundancy. The thicker sealing strip deforms first to absorb tolerances, while the thinner sealing strip enhances local fit, effectively improving the waterproof and dustproof performance of the sunroof edge. At the same time, it reduces the risk of sealing failure due to assembly errors, forming a graded waterproof and dustproof barrier. The overall design balances lightweight, high strength, and sealing reliability.

[0028] Working Principle: For this type of high-strength automotive sunroof sheet metal stamping, the base plate 1, middle plate 2, and upper plate 3 are integrally stamped to form a stepped strength gradient. The rectangular mounting holes 4 on the outer edge, together with the elastic positioning bosses 5 at the bottom of the base plate 1, achieve precise positioning and prevent loosening. The hollow cavity 201 of the middle plate 2 disperses the load through the hexagonal honeycomb reinforcing plate 202, which improves bending stiffness and suppresses stress concentration while reducing weight. The isosceles trapezoidal cross-section first reinforcing rib 301 and second reinforcing rib 302 of the upper plate 3 enhance the surface impact resistance with a grid layout. In the double-layer stepped sealing groove 6 at the bottom of the base plate 1, the thicker first sealing strip 7 acts as the main sealing layer to absorb tolerances and compensate for large gaps, while the thinner second sealing strip 8 acts as the secondary sealing layer to fill micro gaps, forming a graded sealing barrier. The redundancy is optimized by thickness difference, which effectively improves the waterproof and dustproof performance of the sunroof edge and reduces the risk of sealing failure caused by assembly errors. Overall, it achieves synergistic optimization of lightweight, high strength, and sealing reliability.

[0029] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-strength automotive sunroof sheet metal stamping part, comprising a base plate (1) and a middle plate (2), characterized in that: The upper surface of the base plate (1) is integrally stamped with a middle plate (2), and the upper surface of the middle plate (2) is integrally stamped with an upper plate (3). Several mounting holes (4) are stamped at the outer edges of the base plate (1), the middle plate (2) and the upper plate (3), and the mounting holes (4) are arranged in a rectangular pattern. An elastic positioning boss (5) is provided around the mounting holes (4) at the bottom of the base plate (1). A sealing groove (6) is provided at the bottom edge of the base plate (1), and the middle of the sealing groove (6) is filled with a first sealing strip (7) and a second sealing strip (8).

2. A high-strength automotive sunroof panel according to claim 1, characterized in that: The middle layer plate (2) includes a hollow cavity (201) in the middle, and a number of reinforcing plates (202) are integrally stamped in the middle of the hollow cavity (201).

3. A high-strength automotive sunroof panel as defined in claim 2, wherein: The reinforcing plate (202) adopts a hexagonal honeycomb cell structure.

4. The high-strength automotive sunroof panel of claim 1, wherein: The upper surface of the upper plate (3) is integrally stamped with a first reinforcing rib (301) and a second reinforcing rib (302), and the first reinforcing rib (301) and the second reinforcing rib (302) are arranged in a grid pattern with vertical and horizontal lines.

5. A high-strength automotive sunroof panel as defined in claim 4, wherein: The cross-sections of the first reinforcing rib (301) and the second reinforcing rib (302) are isosceles trapezoidal structures.

6. The high-strength automotive sunroof panel of claim 1, wherein: The sealing groove (6) adopts a double-layer stepped structure, and the thickness of the first sealing strip (7) is slightly greater than the thickness of the second sealing strip (8).

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