Shock-resistant automobile A column welding part

Abstract

The utility model provides an anti-impact automobile A column welding part which comprises a welding part body, the welding part body comprises a sound insulation layer, a damping layer is fixed to the top of the sound insulation layer, a fireproof layer is fixed to the top of the damping layer, an electromagnetic shielding layer is arranged on the top of the fireproof layer, and a reinforcing rib layer is arranged on the top of the electromagnetic shielding layer. According to the shock-resistant automobile A column welding part, the electromagnetic shielding layer, the fireproof layer, the reinforcing rib layer and the honeycomb-shaped buffer layer are arranged, so that the shock-resistant automobile A column welding part is good in shock-resistant effect and higher in durability.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to an impact-resistant automotive A-pillar welded component. Background Technology

[0002] In the automotive industry, the A-pillar is a key load-bearing component of the vehicle body structure, and its impact resistance directly affects the safety of occupants.

[0003] Existing patent document CN220562808U discloses a durable A-pillar welded component. Its structure includes a welded component body and multiple functional layers. Specifically, the bottom of the welded component body is sequentially provided with a sound insulation layer, a waterproof layer, a thermal insulation layer, and a buffer layer, while the top is equipped with a corrosion-resistant layer. Simultaneously, the yield strength and tensile strength are improved through a combination of steel plate layers, titanium alloy layers, and magnesium alloy layers, and an impact buffer space is provided using a cavity structure. Although this technical solution optimizes the mechanical properties and functional integration of the A-pillar to some extent, it still has the following significant drawbacks, making it difficult to meet increasingly stringent safety and lightweight requirements.

[0004] When the aforementioned structure is in use, the internal cables and electronic components of the A-pillar are easily damaged in the event of a vehicle collision, electrical failure, or external fire, which can easily lead to the risk of fire spreading. In actual driving, when the vehicle uses the welded A-pillar component, it is easily affected by external electromagnetic interference, which can affect the stability of autonomous driving sensors, vehicle communication equipment, and other devices, posing a safety hazard. Furthermore, existing buffer layers mostly use foam materials or simple cavity structures, and their energy absorption efficiency is limited under complex collision conditions. Although the bending plate design can prevent the buffer layer from deforming, it is heavy and not adaptable to complex collision conditions such as oblique impacts. Its efficiency decreases significantly under repeated impacts, causing inconvenience in actual use.

[0005] Therefore, it is necessary to provide a new impact-resistant automotive A-pillar welded component to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides an impact-resistant automotive A-pillar welded component.

[0007] The impact-resistant automotive A-pillar welded component provided by this utility model includes: a welded component body, the welded component body including a sound insulation layer, a damping layer fixed on top of the sound insulation layer, a fireproof layer fixed on top of the damping layer, an electromagnetic shielding layer provided on top of the fireproof layer, a reinforcing rib layer provided on top of the electromagnetic shielding layer, and a honeycomb-shaped buffer layer fixed at the bottom of the reinforcing rib layer.

[0008] Preferably, a thermal insulation layer and a waterproof layer are fixed between the fireproof layer and the electromagnetic shielding layer from the inside out, with the thermal insulation layer fixed to the top of the fireproof layer and the waterproof layer fixed to the bottom of the electromagnetic shielding layer.

[0009] Preferably, a steel plate layer is fixed between the electromagnetic shielding layer and the buffer layer, and the two sides of the steel plate layer are fixedly connected to the top of the electromagnetic shielding layer and the bottom of the buffer layer, respectively.

[0010] Preferably, a second steel plate layer is fixed to the top of the reinforcing rib layer, and the surface of the second steel plate layer is coated with an anti-corrosion layer.

[0011] Preferably, the sound insulation layer includes two cotton boards and multiple soft cotton layers sandwiched between the two cotton boards.

[0012] Preferably, the reinforcing rib layer is made of steel, and the inclination angle of the reinforcing rib layer is 45°, and the thickness of the reinforcing rib layer is 1.2-2mm.

[0013] Preferably, the damping layer is rubber.

[0014] Preferably, the buffer layer is made of aluminum, and the honeycomb pore size of the buffer layer is 3-10mm.

[0015] Compared with related technologies, the impact-resistant automotive A-pillar welded component provided by this utility model has the following beneficial effects:

[0016] 1. By establishing an electromagnetic shielding layer and a fireproof layer, this utility model significantly reduces the risk of fire spread to the internal cables and electronic components of the A-pillar when an electrical fault occurs due to a vehicle collision or when an external fire source is attacked. The intensity of electromagnetic interference is further attenuated, enabling autonomous driving sensors, vehicle communication and other equipment to work stably in a strong electromagnetic environment.

[0017] 2. This utility model, by establishing a reinforcing rib layer and a honeycomb buffer layer, uses 45° oblique reinforcing ribs with a thickness of 1.2-2mm, which helps to disperse oblique impact force, reduce local stress concentration, and has good impact resistance. The honeycomb buffer layer, with its honeycomb structure, absorbs energy through cell wall buckling and shear deformation during compression. Its multi-cell topology disperses deformation to multiple cell walls, forming a gradient energy absorption mechanism, resulting in good energy absorption and strong buffering force. In contrast, multiple bending plates absorb energy through bending and stretching, and the deformation is concentrated in local areas, which easily leads to stress concentration and early failure. The use of the reinforcing rib layer and the honeycomb buffer layer solves the problem of insufficient adaptability to oblique impact, significant decrease under repeated impacts, and inconvenience caused by it in actual use. Attached Figure Description

[0018] Figure 1A schematic diagram of the overall structure of the impact-resistant automotive A-pillar welded component provided by this utility model;

[0019] Figure 2 A cross-sectional structural diagram of the impact-resistant automotive A-pillar welded component provided by this utility model;

[0020] Figure 3 This is a schematic diagram of the sound insulation layer.

[0021] Figure 4 A schematic diagram of the reinforcing rib layer;

[0022] Figure 5 This is a schematic diagram of the buffer layer structure.

[0023] The following labels are used in the diagram: 1. Welded component body; 11. Sound insulation layer; 111. Cotton board; 112. Soft cotton layer; 12. Damping layer; 2. Thermal insulation layer; 21. Fireproof layer; 3. Waterproof layer; 4. Steel plate layer one; 41. Electromagnetic shielding layer; 5. Buffer layer; 6. Reinforcing rib layer; 7. Steel plate layer two; 8. Corrosion-resistant layer. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please refer to the following: Figures 1 to 5 ,in, Figure 1 A schematic diagram of the overall structure of the impact-resistant automotive A-pillar welded component provided by this utility model; Figure 2 A cross-sectional structural diagram of the impact-resistant automotive A-pillar welded component provided by this utility model; Figure 3 This is a schematic diagram of the sound insulation layer. Figure 4 A schematic diagram of the reinforcing rib layer; Figure 5 This is a schematic diagram of the buffer layer structure.

[0026] In the specific implementation process, such as Figures 1 to 5 As shown, the assembly includes a welded body 1, which includes a sound insulation layer 11, a damping layer 12 fixed to the top of the sound insulation layer 11, a fireproof layer 21 fixed to the top of the damping layer 12, an electromagnetic shielding layer 41 on the top of the fireproof layer 21, a reinforcing rib layer 6 on the top of the electromagnetic shielding layer 41, and a honeycomb-shaped buffer layer 5 fixed to the bottom of the reinforcing rib layer 6.

[0027] A heat insulation layer 2 and a waterproof layer 3 are fixed between the fireproof layer 21 and the electromagnetic shielding layer 41 from the inside out. The waterproof layer 3 is preferably a waterproof membrane. The heat insulation layer 2 is fixed on the top of the fireproof layer 21 and the waterproof layer 3 is fixed on the bottom of the electromagnetic shielding layer 41.

[0028] A steel plate layer 4 is fixed between the electromagnetic shielding layer 41 and the buffer layer 5. The two sides of the steel plate layer 4 are fixedly connected to the top of the electromagnetic shielding layer 41 and the bottom of the buffer layer 5, respectively.

[0029] Among them, the insulation layer 2 is preferably polyurethane foam;

[0030] A steel plate layer 7 is fixed to the top of the reinforcing rib layer 6, and the surface of the steel plate layer 7 is coated with an anti-corrosion layer 8.

[0031] Among them, the anti-corrosion layer 8 is preferably a zinc-aluminum coating with a thickness of ≥20μm or an electrophoretic paint to prevent electrochemical corrosion;

[0032] Specifically, the sound insulation layer 11 and the damping layer 12 are bonded together, preferably by hot melt adhesive or water-based adhesive;

[0033] The damping layer 12 is bonded to the insulation layer 2, preferably by butyl rubber adhesive.

[0034] The insulation layer 2 and the waterproof layer 3 are preferably bonded together with polyurethane adhesive.

[0035] The waterproof layer 3 and the electromagnetic shielding layer 41 are joined by hot pressing technology, preferably with local welding assistance;

[0036] Electromagnetic shielding layer 41 is bonded to steel plate layer 4 with conductive adhesive;

[0037] The steel plate layer 4 and the buffer layer 5 are laser welded together.

[0038] The bonding method between buffer layer 5 and reinforcing rib layer 6;

[0039] The reinforcing rib layer 6 and the steel plate layer 7 are preferably laser-welded;

[0040] The steel plate layer 7 and the anti-corrosion layer 8 are fixed by electrophoretic coating / spraying.

[0041] Furthermore, by establishing an electromagnetic shielding layer 41 and a fireproof layer 21, the risk of fire spread to the internal cables and electronic components of the A-pillar is significantly reduced when an electrical fault occurs due to a vehicle collision or when an external fire source is attacked. The intensity of electromagnetic interference is further attenuated, enabling autonomous driving sensors, vehicle communication and other equipment to work stably in a strong electromagnetic environment.

[0042] By setting up a reinforcing rib layer 6 and a honeycomb buffer layer 5, the reinforcing rib layer 6 adopts a 45° oblique reinforcing rib with a thickness of 1.2-2mm, which helps to disperse the oblique impact force, reduce local stress concentration, and has a good impact resistance. The honeycomb buffer layer 5, with its honeycomb structure, absorbs energy through cell wall buckling and shear deformation during compression. Its multi-cell topology disperses the deformation to multiple cell walls, forming a gradient energy absorption mechanism, which has a good energy absorption effect and strong buffering force.

[0043] Furthermore, the reinforcing rib layer 6 is made of steel, and the inclination angle of the reinforcing rib layer 6 is 45°, and the thickness of the reinforcing rib layer 6 is 1.2-2mm;

[0044] The fireproof layer 21 is preferably aluminum hydroxide (ATH) or expanded graphite, which forms a heat-insulating carbon layer when exposed to fire. Flame-retardant fibers, such as aramid 1313, can also be embedded in the fireproof layer 21.

[0045] The electromagnetic shielding layer 41 is preferably a copper-nickel alloy foil or a conductive polymer, forming a Faraday cage effect. Studies have shown that it can shield electromagnetic interference from 10kHz to 3GHz. In this structure, the electromagnetic shielding layer 41 uses a 0.05mm thick copper-nickel alloy foil.

[0046] In addition, the reinforcing rib layer 6 is preferably made of high-strength steel, such as DP steel or hot-formed steel. In actual use, if side impact protection is the primary goal, 1.8mm thick DP800 steel is preferred; if both lightweight and performance need to be considered, 2.0mm thick 6061-T6 aluminum alloy can also be selected. Studies have shown that it can reduce weight by 15%-20% while increasing energy absorption efficiency by more than 30%.

[0047] refer to Figures 1 to 5 As shown, the sound insulation layer 11 includes two cotton boards 111 and multiple soft cotton layers 112, with the multiple soft cotton layers 112 sandwiched between the two cotton boards 111.

[0048] Specifically, the soft cotton layer 112 uses porous sound-absorbing materials, such as polyester fiber cotton, which converts sound energy into heat energy through the friction and viscosity of sound waves in the pores. It is particularly effective in absorbing mid-to-high frequency noise (500-4000Hz), similar to multiple layers of sponge. Sound waves need to penetrate the material multiple times, and the energy is attenuated layer by layer. In addition, the soft cotton layer 112 uses low-density sound-absorbing materials, and the cotton board 111 uses thin high-density materials, resulting in a significant reduction in overall weight compared to traditional sound insulation materials.

[0049] refer to Figures 1 to 5 As shown, the damping layer 12 is made of rubber;

[0050] Among them, high damping materials are used, preferably butyl rubber, to convert vibration energy into heat energy, and optimization is carried out for low frequency noise of 100-300Hz.

[0051] The material of buffer layer 5 is aluminum;

[0052] Specifically, the buffer layer 5 has hexagonal honeycomb-shaped pores with a wall thickness of 0.05-0.2mm and a pore diameter of 3-10mm, and is made by multi-layer stacking.

[0053] Furthermore, under axial compression, the honeycomb structure absorbs energy through plastic deformation, with a specific energy absorption capacity (SEA) of 15-30 kJ / kg. Moreover, its density is only 1 / 3 that of steel, resulting in significant weight reduction. In addition, during manufacturing, the pore size and wall thickness can be adjusted to match different collision conditions.

[0054] The circuits and controls involved in this utility model are all existing technologies and will not be described in detail here.

[0055] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An impact-resistant automotive A-pillar welded component, comprising a welded component body (1), characterized in that, The welded body (1) includes a sound insulation layer (11), a damping layer (12) is fixed on the top of the sound insulation layer (11), a fireproof layer (21) is fixed on the top of the damping layer (12), an electromagnetic shielding layer (41) is provided on the top of the fireproof layer (21), a reinforcing rib layer (6) is provided on the top of the electromagnetic shielding layer (41), and a honeycomb-shaped buffer layer (5) is fixed at the bottom of the reinforcing rib layer (6).

2. The impact-resistant automotive A-pillar welded component according to claim 1, characterized in that, A heat insulation layer (2) and a waterproof layer (3) are fixed between the fireproof layer (21) and the electromagnetic shielding layer (41) from the inside out. The heat insulation layer (2) is fixed to the top of the fireproof layer (21), and the waterproof layer (3) is fixed to the bottom of the electromagnetic shielding layer (41).

3. The impact-resistant automotive A-pillar welded component according to claim 2, characterized in that, A steel plate layer (4) is fixed between the electromagnetic shielding layer (41) and the buffer layer (5). The two sides of the steel plate layer (4) are fixedly connected to the top of the electromagnetic shielding layer (41) and the bottom of the buffer layer (5), respectively.

4. The impact-resistant automotive A-pillar welded component according to claim 3, characterized in that, The top of the reinforcing rib layer (6) is fixed with a steel plate layer (7), and the surface of the steel plate layer (7) is coated with an anti-corrosion layer (8).

5. The impact-resistant automotive A-pillar welded component according to claim 4, characterized in that, The sound insulation layer (11) includes two cotton boards (111) and multiple soft cotton layers (112), with the multiple soft cotton layers (112) sandwiched between the two cotton boards (111).

6. The impact-resistant automotive A-pillar welded component according to claim 5, characterized in that, The reinforcing rib layer (6) is made of steel, and the inclination angle of the reinforcing rib layer (6) is 45°, and the thickness of the reinforcing rib layer (6) is 1.2-2mm.

7. The impact-resistant automotive A-pillar welded component according to claim 1, characterized in that, The damping layer (12) is made of rubber.

8. The impact-resistant automotive A-pillar welded component according to claim 6, characterized in that, The buffer layer (5) is made of aluminum, and the honeycomb pore size of the buffer layer (5) is 3-10mm.

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