Body-in-white front anti-collision beam assembly, preparation method and vehicle
By designing the arc-shaped front anti-collision beam body and multi-layer energy-absorbing box structure, the shortcomings of the traditional front anti-collision beam assembly under the modern five-star standard are solved, uniform deformation and good compatibility under different collision conditions are achieved, and the collision safety of the entire vehicle is significantly improved.
Patent Information
- Application Number
- CN202510120583.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-25
- Publication Date
- 2025-03-25
AI Technical Summary
The traditional front anti-collision beam assembly structural design cannot meet the requirements of modern collision five-star standards, especially in the collision conditions of 50% overlapping moving progressive barriers on the front, the structural compatibility is poor and the collision force transmission is unbalanced, resulting in insufficient safety of the entire vehicle.
A white car body front anti-collision beam assembly is designed, including an arc-shaped front anti-collision beam body, a first energy-absorbing box group and a second energy-absorbing box group. The energy-absorbing box group is equipped with a U-shaped guide groove along the circumferential direction, and the structural strength is enhanced by reinforcement ribs to ensure that energy can be effectively absorbed and transmitted in different collision conditions.
In the 25% small bias collision situation on the front, the front-end structure can fully participate in the deformation energy absorption and increase the stress surface; in the 50% overlapping moving progressive barrier collision situation on the front, the barrier deformation is more uniform, the collision structure is better compatible, the collision force transmission is more balanced, and the collision safety of the whole vehicle is greatly improved.
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Figure CN119682684A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of vehicle manufacturing, and in particular to a body-in-white front anti-collision beam assembly, a preparation method and a vehicle. Background Art
[0002] The front anti-collision beam assembly is located at the front end of the passenger car body-in-white, including the anti-collision beam and the energy absorption box. It is one of the most important load-bearing and energy-absorbing assemblies when the vehicle is in a head-on collision. When the vehicle collides at medium and low speeds, the front anti-collision beam assembly can absorb most of the collision impact energy, thereby protecting the rear cooling system, engine hood, fenders and other components, effectively reducing damage to the passenger compartment and drivers and passengers. When the vehicle collides at medium and high speeds, the front anti-collision beam assembly can absorb part of the energy and transmit the collision force to subsequent longitudinal beams and other structures. The high strength of the front anti-collision beam can effectively achieve uniform transmission of the collision force, which has a vital impact on the collision deformation mode, collision force, acceleration and other key indicators of the entire front cabin. With consumers' attention to automobile safety and the increasingly stringent various collision evaluation procedures, the traditional front anti-collision beam assembly structural design scheme can no longer meet the high collision standards. Summary of the invention
[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.
[0004] To this end, in a first aspect of the present disclosure, a front anti-collision beam assembly of a vehicle body in white is provided, comprising a front anti-collision beam body, a first energy absorption box group and a second energy absorption box group, wherein the front anti-collision beam body is arranged in an arc shape, and the first energy absorption box group and the second energy absorption box group are arranged on both sides of the front anti-collision beam body, respectively.
[0005] The first energy absorption box group includes a first mounting plate and a plurality of first energy absorption boxes, wherein one end of the plurality of first energy absorption boxes is connected to the front anti-collision beam body, and the other opposite end is connected to the first mounting plate;
[0006] The second energy absorption box group includes a second mounting plate and a plurality of second energy absorption boxes, wherein two ends of the plurality of second energy absorption boxes are connected to the front anti-collision beam body, and the other two opposite ends are connected to the second mounting plate;
[0007] The plate surfaces of the first mounting plate and the second mounting plate are at the same level.
[0008] In a feasible implementation manner, the first energy absorbing box and the second energy absorbing box are provided with a plurality of U-shaped guide grooves along the circumferential direction.
[0009] In a feasible embodiment, the U-shaped guide groove includes a first guide groove, a second guide groove and a third guide groove, the first guide groove and the second guide groove are relatively arranged on both sides of the first energy absorption box and / or the second energy absorption box, and the third guide groove is arranged below the second guide groove.
[0010] In a feasible implementation manner, the third guide groove includes a first guide portion and a second guide portion, the first guide portion and the second guide portion are horizontally and spaced apart, a reinforcing rib is provided between the first guide portion and the second guide portion, and the reinforcing rib is provided along the extension direction of the energy absorption box.
[0011] In a feasible implementation manner, a distance between one side of the first energy absorption box group and the second energy absorption box group close to the edge of the front bumper beam body and the edge of the front bumper beam body is less than or equal to 35 mm.
[0012] In a feasible embodiment, concave-convex reinforcing ribs are arranged on a surface of the front bumper beam body close to the front longitudinal beam, the concave-convex reinforcing ribs are arranged along the extension direction of the front bumper beam body, and the depth of the concave-convex reinforcing ribs is less than or equal to one quarter of the width of the front bumper beam body.
[0013] In a feasible implementation manner, the number of the concave-convex reinforcing ribs is set to two, and the two concave-convex reinforcing ribs are arranged at intervals in the width direction of the front anti-collision beam body.
[0014] In a feasible implementation manner, the number of the first energy absorption box and the second energy absorption box is set to two.
[0015] In a second aspect of the present disclosure, a method for preparing a front anti-collision beam assembly of a body-in-white is provided, comprising:
[0016] Determine the size of the front longitudinal beam of the body-in-white and the installation interface position with the front anti-collision beam assembly according to the overall size of the designed vehicle and the installation size of the power module;
[0017] The rear end dimensions of the first energy absorption box group and the second energy absorption box group are smaller than or equal to the cross-sectional dimensions of the front longitudinal beam, and the front end dimensions are smaller than or equal to the dimensions of the front anti-collision beam body. The stamping die of the parts is designed for springback compensation to control the dimensional accuracy of the parts.
[0018] Installing the first energy absorption box group and the second energy absorption box group on both sides of the front anti-collision beam body;
[0019] The front anti-collision beam body adopts a roll forming process to form a Japanese-shaped cross-section structure, and ensures that the maximum stress in the deformation area during the forming process is less than or equal to 0.89 times the tensile strength of the material, and the maximum strain is less than or equal to the 10% safety margin range of the material forming limit diagram;
[0020] After the front anti-collision beam body, the first energy absorption box group and the second energy absorption box group are installed, the performance of the assembly is analyzed by using a hammer head with R152.4mm to load the middle position of the front anti-collision beam body at a loading speed of 100mm / min until the performance meets the requirements.
[0021] In a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned body-in-white front anti-collision beam assembly.
[0022] Compared with the prior art, the present disclosure at least includes the following beneficial effects: the present disclosure sets a first energy absorption box group and a second energy absorption box group on the anti-collision beam body, the front anti-collision beam body is set to an arc shape, the first energy absorption box group and the second energy absorption box group are respectively set on both sides of the front anti-collision beam body, the first energy absorption box group includes a first mounting plate and a plurality of first energy absorption boxes, one end of the plurality of first energy absorption boxes is connected to the front anti-collision beam body, and the other opposite end is connected to the first mounting plate, so as to ensure that under the frontal 25% small offset collision condition, the front end structure can fully participate in the deformation energy absorption, and at the same time increase the front end force bearing surface of the front anti-collision beam, so as to ensure that the barrier deformation is more uniform in the frontal 50% overlapping moving progressive barrier collision condition, and the collision structure has better compatibility; the second energy absorption box group includes a second mounting plate and a plurality of second energy absorption boxes, two ends of the plurality of second energy absorption boxes are connected to the front anti-collision beam body, and the other two opposite ends are connected to the second mounting plate; the plate surfaces of the first mounting plate and the second mounting plate are at the same level, which can increase the contact area and transmit the collision force. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0026] Figure 1 This is one of the structural schematic diagrams of the front anti-collision beam body 1, the first energy absorption box group and the second energy absorption box group disclosed in the present invention;
[0027] Figure 2 This is the second structural schematic diagram of the front anti-collision beam body 1, the first energy absorption box group and the second energy absorption box group disclosed in the present invention;
[0028] Figure 3 It is a structural schematic diagram of the first energy absorption box group disclosed in the present invention;
[0029] Figure 4 It is a schematic structural diagram of the first energy absorption box disclosed in the present invention;
[0030] Figure 5 Schematic diagram of the cross-sectional structure of the front anti-collision beam body disclosed in the present invention
[0031] Figure 6 It is a structural schematic diagram of the installation of the first energy absorption box group and the front longitudinal beam disclosed in the present invention.
[0032] in, Figures 1 to 6 The correspondence between the reference numerals and the component names is as follows: 1-front anti-collision beam body; 2-first energy absorption box group; 21-first mounting plate; 22-first energy absorption box; 31-second mounting plate; 32-second energy absorption box; 4-guide groove; 41-first guide groove; 42-second guide groove; 43-third guide groove; 431-first guide portion; 432-second guide portion; 5-reinforcement rib; 6-concave and convex reinforcement rib. DETAILED DESCRIPTION
[0033] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.
[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.
[0035] As consumers pay more attention to automobile safety and various collision evaluation procedures become increasingly stringent, the traditional front anti-collision beam assembly structural design scheme can no longer meet the requirements of the collision five-star standard. The traditional front anti-collision beam design usually adopts a "C"-shaped cold / hot-formed stamping part, and a pair of high-strength steel energy absorption boxes are adapted to the left and right sides of the rear. The high-strength front anti-collision beam assembly can play a good role in the frontal 100% overlap rigid barrier collision test, but in the frontal 50% overlap moving progressive barrier collision condition, it is necessary to consider the impact of the test vehicle on the barrier reaction, which leads to poor compatibility of the test results and the test vehicle is more aggressive to other vehicles; at the same time, in the frontal 25% small offset collision test, due to the short lateral length of the front anti-collision beam, the energy absorption box on the rear side cannot directly participate in the collision energy absorption of this condition, resulting in poor performance in resisting collision, which directly affects the safety crashworthiness evaluation of the whole vehicle.
[0036] Therefore, there is an urgent need for a highly crash-resistant body-in-white front bumper beam assembly structure to improve the torsional and bending stiffness of the front bumper beam and effectively withstand the collision force of a 25% small offset frontal collision condition, so that the front-end structure can fully participate in deformation and energy absorption. At the same time, the widened front bumper beam can increase the force-bearing surface during a frontal collision, ensuring that the barrier deformation is more uniform in a 50% overlapping moving progressive barrier collision condition, and the collision structure has better compatibility. The entire assembly can make the transmission of collision force more balanced and greatly improve energy absorption, thereby improving the collision safety of the entire vehicle.
[0037] Based on this, an embodiment of the present disclosure provides a front bumper beam assembly of a body in white, wherein a first energy absorption box group and a second energy absorption box group are arranged on the bumper beam body, the front bumper beam body is arranged in an arc shape, the first energy absorption box group and the second energy absorption box group are respectively arranged on both sides of the front bumper beam body, the first energy absorption box group includes a first mounting plate and a plurality of first energy absorption boxes, one end of the plurality of first energy absorption boxes is connected to the front bumper beam body, and the other opposite end is connected to the first mounting plate, so as to ensure that under the frontal 25% small offset collision condition, the front end structure can fully participate in the deformation energy absorption, and at the same time increase the front end force bearing surface of the front bumper beam, so as to ensure that under the frontal 50% overlapping moving progressive barrier collision condition, the barrier deformation is more uniform and the collision structure has better compatibility; the second energy absorption box group includes a second mounting plate and a plurality of second energy absorption boxes, two ends of the plurality of second energy absorption boxes are connected to the front bumper beam body, and the other two opposite ends are connected to the second mounting plate; the plate surfaces of the first mounting plate and the second mounting plate are at the same level, so as to increase the contact area and transmit the collision force.
[0038] The front anti-collision beam assembly of the body in white is described in detail below through a specific embodiment:
[0039] Reference Figures 1 to 6As shown, in a first aspect of the present disclosure, a front bumper beam assembly of a vehicle body in white is provided, comprising a front bumper beam body 1, a first energy absorption box group 2 and a second energy absorption box group 3, the front bumper beam body 1 is arranged in an arc shape, the first energy absorption box group 2 and the second energy absorption box group 3 are respectively arranged on both sides of the front bumper beam body 1, the first energy absorption box group 2 comprises a first mounting plate 21 and a plurality of first energy absorption boxes 22, one end of the plurality of first energy absorption boxes 22 is connected to the front bumper beam body 1, and the other opposite end is connected to the first mounting plate 21;
[0040] The second energy absorption box group 3 includes a second mounting plate 31 and a plurality of second energy absorption boxes 32. Two ends of the plurality of second energy absorption boxes 32 are connected to the front anti-collision beam body 1, and the other two opposite ends are connected to the second mounting plate 31. The plate surfaces of the first mounting plate 21 and the second mounting plate 31 are at the same level.
[0041] The present invention provides a first energy absorption box group 2 and a second energy absorption box group 3 on the anti-collision beam body 1, and configures the front anti-collision beam body to be arc-shaped so as to better transmit the collision force, wherein the first energy absorption box group 2 and the second energy absorption box group 3 are respectively arranged on both sides of the front anti-collision beam body 1, specifically, the first energy absorption box group 2 includes a first mounting plate 21 and a plurality of first energy absorption boxes 22, one end of the plurality of first energy absorption boxes is connected to the front anti-collision beam body 1, and the other opposite end is connected to the first mounting plate 21, to ensure that under the frontal 25% small offset collision condition, the front end structure can fully participate in the deformation energy absorption, and at the same time increase the front end force bearing surface of the front anti-collision beam, to ensure that the barrier deformation is more uniform under the frontal 50% overlapping moving progressive barrier collision condition, and the collision structure has better compatibility; in this embodiment, the second energy absorption box group 3 of the present invention is consistent with the first energy absorption box group 2 in structural form, and the necessary first mounting plate and the second mounting plate are at the same level, which can increase the contact area and transmit the collision force. It should be noted that, if Figure 1 As shown, taking the first energy absorption box group 2 as an example, the number of the first energy absorption boxes 22 is set to two, and the two first energy absorption boxes 22 are arranged in parallel. Because of the arc shape of the anti-collision beam body 1, the arc design of the front anti-collision beam body needs to be considered. The lengths of the two first energy absorption boxes 22 are different, one of which is shorter than the other to adapt to the arc-shaped anti-collision beam body 1. It can be a rectangular chamfered cross-sectional structure, the front end cross-sectional size does not exceed the width size of the front anti-collision beam body 1, and the changing arc is consistent with the front anti-collision beam body. The rear end cross-sectional size does not exceed the size of the front longitudinal beam. The overall form is small at the front end and large at the rear end. The arc design of the front anti-collision beam body needs to be considered. The energy absorption box single box can be set as a two-piece structure, connected by spot welding process to improve strength, and the welding point spacing is 20-25mm. The spacing is less than 20mm, which increases the cost and welding difficulty; the spacing is greater than 25, which is easy to tear in the middle position and cannot play an effective connection role. Further, the number of energy absorption boxes in the first energy absorption box group 2 and the second energy absorption box group 3 is not limited to two, and can be set according to the actual length of the front anti-collision beam.
[0042] The anti-collision beam body 1 disclosed in the present invention adopts a roll forming process and has a Japanese-shaped cross-section structure. In order to play the role of low-speed load-bearing, high-speed load-bearing and energy absorption, the material strength level is required to be relatively high, and ultra-high strength steel plates are selected. The tensile strength level is ≥1200MPa, the ratio of yield strength to tensile strength is ≥0.7, and the thickness is controlled at 1.2-1.5mm. If the thickness is less than 1.2mm, the energy absorption is insufficient and the acceleration of the occupant position increases, and the safety evaluation cannot be met; if the thickness is greater than 1.5mm, the deformation energy required is too high, and the energy absorption requirements of medium and low speed wrinkle deformation cannot be achieved.
[0043] In some embodiments, the first energy absorbing box 22 and the second energy absorbing box 32 are provided with a plurality of U-shaped guide grooves 4 along the circumferential direction. The U-shaped guide grooves 4 are deformed by compression during the collision process to achieve energy absorption.
[0044] In some embodiments, the U-shaped guide groove 4 includes a first guide groove 41, a second guide groove 42 and a third guide groove 43. The first guide groove 41 and the second guide groove 42 are relatively arranged on both sides of the first energy absorption box 22 and / or the second energy absorption box 32, and the third guide groove 43 is arranged below the second guide groove 42.
[0045] In some embodiments, the third guide groove 43 includes a first guide portion 431 and a second guide portion 432, the first guide portion 431 and the second guide portion 432 are arranged horizontally and at intervals, and a reinforcing rib 5 is arranged between the first guide portion 431 and the second guide portion 432, and the reinforcing rib 5 is arranged along the extension direction of the energy absorption box. The wrinkle energy absorption is achieved through crushing deformation, and the reinforcing rib at the rear end of the energy absorption box can further resist the residual energy after secondary absorption and achieve smooth transmission; the lengthened front anti-collision beam body and the double energy absorption box structure can effectively participate in the 25% small offset frontal collision, realize energy absorption and transmission to the front longitudinal beam, and at the same time ensure that the barrier deformation is more uniform in the 50% overlapping moving progressive barrier collision condition, and the collision structure has better compatibility.
[0046] In some embodiments, the distance between the first energy absorption box group 2 and the second energy absorption box group 3 close to the edge of the front bumper beam body 1 and the edge of the front bumper beam body 1 is less than or equal to 35 mm.
[0047] In some embodiments, a concave-convex reinforcing rib 6 is arranged on one surface of the front bumper beam body 1 close to the front longitudinal beam, the concave-convex reinforcing rib 6 is arranged along the extension direction of the front bumper beam body 1, and the depth of the concave-convex reinforcing rib 6 is less than or equal to one quarter of the width of the front bumper beam body 1.
[0048] In this embodiment, in order to improve the collision resistance and overall stiffness characteristics of the front anti-collision beam assembly, through-type concave-convex reinforcing ribs 6 are designed on the upper and lower rear walls of the cross-section of the "S"-shaped anti-collision beam body 1, and the depth does not exceed one-fourth of the width of the beam body. This design improves the complexity of the outer contour of the "S"-shaped cross-section, and the entire beam body has excellent bending and torsion resistance; the two sealing edges of the "S"-shaped cross-section are both laser welded. Furthermore, the number of concave-convex reinforcing ribs 6 is set to two, and the two concave-convex reinforcing ribs 6 are spaced apart in the width direction of the front anti-collision beam body 1 to better improve the strength of the anti-collision beam body 1.
[0049] In a second aspect of the present disclosure, a method for preparing a front anti-collision beam assembly of a body-in-white is provided, comprising:
[0050] Determine the size of the front longitudinal beam of the body-in-white and the installation interface position with the front anti-collision beam assembly according to the overall size of the designed vehicle and the installation size of the power module;
[0051] The rear end dimensions of the first energy absorption box group 2 and the second energy absorption box group 3 are smaller than or equal to the cross-sectional dimensions of the front longitudinal beam, and the front end dimensions are smaller than or equal to the dimensions of the front anti-collision beam body 1, and the stamping die of the parts is designed for springback compensation to control the dimensional accuracy of the parts;
[0052] The first energy absorption box group 2 and the second energy absorption box group 3 are installed on both sides of the front anti-collision beam body 1;
[0053] The front anti-collision beam body 1 adopts a roll forming process to form a Japanese-shaped cross-section structure, and ensures that the maximum stress in the deformation area during the forming process is less than or equal to 0.89 times the tensile strength of the material, and the maximum strain is less than or equal to the 10% safety margin range of the material forming limit diagram;
[0054] After the front anti-collision beam body 1 and the first energy absorption box group 2 and the second energy absorption box group 3 are installed, the performance of the assembly is analyzed by using a hammer head with R152.4mm to load the middle position of the front anti-collision beam body 1 at a loading speed of 100mm / min until the performance meets the requirements.
[0055] In the preparation method, firstly, the size of the front longitudinal beam of the body-in-white and the installation interface position with the front anti-collision beam assembly, i.e., the position and distance between the first mounting plate 21 and the second mounting plate 31, are determined according to the overall size of the designed vehicle and the installation size of the power module. At the same time, the maximum vertical height of the front anti-collision beam body 1 can be determined. At the same time, the lateral distance of the front anti-collision beam body 1 and the highest point position of the front end surface can be determined according to the size of the engine hood and the size of the fender.
[0056] The rear end size of the first energy absorption box group 2 and the second energy absorption box group 3 is less than or equal to the cross-sectional size of the front longitudinal beam, and the front end size is less than or equal to the size of the front anti-collision beam body 1, and the part stamping die is designed for rebound compensation to control the dimensional accuracy of the parts; the material strength requirement should not be too high, the tensile strength level is ≤590MPa, and the thickness is controlled at 1.2-1.5mm; the single energy absorption box can adopt a two-piece structure, connected by spot welding process, and the welding point spacing is 20-25mm; the front end of the energy absorption box is arranged with a transverse guide groove, and the rear end is arranged with a longitudinal reinforcement rib; the draft radius is 4-5mm, the vertical draft angle is not less than 6°, the maximum material thinning rate is controlled at 10%-18%, and the part stamping die is designed for rebound compensation to ensure the dimensional accuracy of the parts, and the rebound amount is controlled at ±0.3-1.0mm;
[0057] The first energy absorption box group 2 and the second energy absorption box group 3 are installed on both sides of the front anti-collision beam body 1, and the distance between the energy absorption boxes at the edges of both sides and the edge line of the front anti-collision beam body 1 can be controlled within 35mm; in the welding method of the first energy absorption box group 2 and the second energy absorption box group 3 and the front anti-collision beam body 1, carbon dioxide gas shielded welding can be used for connection, which effectively increases the welding area;
[0058] For the specific height, width and material thickness of the cross section of the front bumper beam body 1 and the material thickness of the energy absorption box, the orthogonal test method is used for optimal design. The material is ultra-high strength steel plate with a tensile strength level of ≥1200MPa, a yield strength to tensile strength ratio of ≥0.7, and a thickness controlled at 1.2-1.4mm. The optimization target is that under the frontal 100% overlapping rigid barrier collision condition, the first energy absorption box group 2 and the second energy absorption box group 3 are close to the energy absorption box at the center axis of the front bumper beam body 1. The maximum acceleration at the center position is ≤30g (g is the acceleration of gravity). If it is greater than 30G, it will cause damage to the occupants and does not meet the requirements. The maximum crush displacement is ≤half of the length of the energy absorption box. If the crush is too large, it will cause damage to the front-end module. When the target values of multiple schemes are basically equal (the difference is controlled at ±3%), the design scheme with the smallest total mass is selected;
[0059] The front anti-collision beam body 1 adopts the roll forming process, with a spherical cross-section structure. Through-type concave-convex reinforcement ribs are designed on the upper and lower surfaces of the rear wall, and the depth does not exceed one-fourth of the width of the front anti-collision beam body 1; the two sealing edges of the spherical cross-section are laser welded, and the front anti-collision beam body 1 is in an arc shape in the horizontal direction, high in the middle and low at both ends, and the height difference is controlled at 100-150mm. If it is less than 100mm, it is easy to damage the front-end module during a collision; if it is greater than 150mm, it is not conducive to the front-end shape;
[0060] In order to meet the manufacturing requirements, the cross-sectional width of the front anti-collision beam body 1 shall not be less than 30mm; the roll forming process and roll pattern of the beam body shall be designed. According to the cross-sectional shape, size and material strength level, 28 to 35 passes shall be designed to ensure that the maximum stress in the deformation area during the forming process is ≤0.89 times the tensile strength of the material, the maximum strain does not exceed the 10% safety margin range of the material forming limit diagram, and the maximum material thinning rate is controlled at 11 to 17%; the springback of the parts is controlled at ±0.3 to 1.0mm; the radius of the large-size fillet is 5 to 10 times the thickness of the plate, and the radius of the small-size fillet is 4 to 6 times the thickness of the plate;
[0061] The strength requirements of the materials selected for the first mounting plate 21 and the second mounting plate 31 should not be too high, the tensile strength level is ≤590MPa, and the thickness is controlled within 2.0-3.0mm. If the thickness is less than 2mm, deformation is likely to occur, which is not conducive to wrinkle formation; if the thickness is greater than 3mm, it does not meet the lightweight requirements; a cold stamping forming process is adopted, and light holes with a diameter of not less than 15mm are opened around for bolt fixing; the forming safety margin of the forming limit diagram of the part is greater than 10%, and the thinning rate is controlled within 12%; the springback amount of the middle part of the part is controlled within ±0.5-1.0mm, and the springback amount of the four flange edges is controlled within ±0.5-1.0mm;
[0062] After the front bumper beam assembly is assembled, analyze the performance of the assembly; fix the first mounting plate 21 and the second mounting plate 31; use a hammer head with R152.4mm to load the middle position of the 101 front bumper beam body at a loading speed of 100mm / min until the sample breaks, and the peak load is not less than 3.5kN, otherwise, repeat the above-mentioned orthogonal test optimization design method until the performance meets the requirements;
[0063] After the final solution meets the performance requirements, the parameters of the solution are fixed and mass production is organized; after the welding process is completed, all parts and assemblies are subjected to electrophoretic anti-corrosion treatment; and they are installed to the corresponding position of the front end of the body in white through the mounting holes of the first mounting plate 21 and the second mounting plate 31, and the implementation is completed.
[0064] In a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned body-in-white front anti-collision beam assembly.
[0065] In the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.
[0066] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present disclosure.
[0067] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0068] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.
Claims
1. A front anti-collision beam assembly of a body-in-white, characterized in that: It includes a front anti-collision beam body, a first energy absorption box group and a second energy absorption box group, wherein the front anti-collision beam body is arranged in an arc shape, the first energy absorption box group and the second energy absorption box group are arranged on both sides of the front anti-collision beam body respectively, wherein: The first energy absorption box group includes a first mounting plate and a plurality of first energy absorption boxes, wherein one end of the plurality of first energy absorption boxes is connected to the front anti-collision beam body, and the other opposite end is connected to the first mounting plate; The second energy absorption box group includes a second mounting plate and a plurality of second energy absorption boxes, wherein two ends of the plurality of second energy absorption boxes are connected to the front anti-collision beam body, and the other two opposite ends are connected to the second mounting plate; The plate surfaces of the first mounting plate and the second mounting plate are at the same level.
2. The front anti-collision beam assembly of the body-in-white according to claim 1, characterized in that: The first energy absorbing box and the second energy absorbing box are provided with a plurality of U-shaped guide grooves along the circumferential direction.
3. The front anti-collision beam assembly of the body-in-white according to claim 2, characterized in that: The U-shaped guide groove includes a first guide groove, a second guide groove and a third guide groove. The first guide groove and the second guide groove are relatively arranged on both sides of the first energy absorption box and / or the second energy absorption box, and the third guide groove is arranged below the second guide groove.
4. The front anti-collision beam assembly of the body-in-white according to claim 3 is characterized in that: The third guide groove includes a first guide portion and a second guide portion, the first guide portion and the second guide portion are arranged horizontally and spaced apart, a reinforcing rib is arranged between the first guide portion and the second guide portion, and the reinforcing rib is arranged along the extension direction of the energy absorption box.
5. The front anti-collision beam assembly of the body-in-white according to claim 1, characterized in that: The distance between the side of the first energy absorption box group and the second energy absorption box group close to the edge of the front bumper beam body and the edge of the front bumper beam body is less than or equal to 35 mm.
6. The front anti-collision beam assembly of the body-in-white according to claim 1, characterized in that: Concave-convex reinforcing ribs are arranged on one surface of the front anti-collision beam body close to the front longitudinal beam. The concave-convex reinforcing ribs are arranged along the extension direction of the front anti-collision beam body, and the depth of the concave-convex reinforcing ribs is less than or equal to one quarter of the width of the front anti-collision beam body.
7. The front anti-collision beam assembly of the body-in-white according to claim 1, characterized in that: The number of the concave-convex reinforcing ribs is set to two, and the two concave-convex reinforcing ribs are arranged at intervals in the width direction of the front anti-collision beam body.
8. The front anti-collision beam assembly of the body-in-white according to claim 1, characterized in that: The number of the first energy absorbing box and the second energy absorbing box is set to two.
9. A method for preparing a front anti-collision beam assembly of a body-in-white, characterized in that: include: Determine the size of the front longitudinal beam of the body-in-white and the installation interface position with the front anti-collision beam assembly according to the overall size of the designed vehicle and the installation size of the power module; The rear end dimensions of the first energy absorption box group and the second energy absorption box group are smaller than or equal to the cross-sectional dimensions of the front longitudinal beam, and the front end dimensions are smaller than or equal to the dimensions of the front anti-collision beam body. The stamping die of the parts is designed for springback compensation to control the dimensional accuracy of the parts. Installing the first energy absorption box group and the second energy absorption box group on both sides of the front anti-collision beam body; The front anti-collision beam body adopts a roll forming process to form a Japanese-shaped cross-section structure, and ensures that the maximum stress in the deformation area during the forming process is less than or equal to 0.89 times the tensile strength of the material, and the maximum strain is less than or equal to the 10% safety margin range of the material forming limit diagram; After the front anti-collision beam body, the first energy absorption box group and the second energy absorption box group are installed, the performance of the assembly is analyzed by using a hammer head with R152.4mm to load the middle position of the front anti-collision beam body at a loading speed of 100mm / min until the performance meets the requirements.
10. A vehicle, characterized in that: A body-in-white front anti-collision beam assembly comprising any one of claims 1 to 8.