阅读说明：本技术 一种轻量化汽车防撞梁结构 (Lightweight car anticollision roof beam structure ) 是由 董含武 张娜 叶小舟 詹俊 王文均 王联 漆卫东 于 2021-07-08 设计创作，主要内容包括：本发明公开了一种轻量化汽车防撞梁结构,包括防撞梁本体、可与汽车固定的连接板、连接固定防撞梁本体与连接板的吸能盒,防撞梁本体、连接板以及吸能盒均由轻金属或轻金属合金制成。本发明的防撞梁整体材料采用镁合金,其比强度高、塑性良好、减震性强,并且其吸能效果较好,能有效防止或减少碰撞对车身及底盘零部件的损伤。(The invention discloses a lightweight automobile anti-collision beam structure which comprises an anti-collision beam body, a connecting plate capable of being fixed with an automobile and an energy absorption box for connecting and fixing the anti-collision beam body and the connecting plate, wherein the anti-collision beam body, the connecting plate and the energy absorption box are all made of light metal or light metal alloy. The anti-collision beam is made of magnesium alloy, has high specific strength, good plasticity, strong shock absorption and good energy absorption effect, and can effectively prevent or reduce the damage of collision to parts of a vehicle body and a chassis.)

1. The utility model provides a lightweight car anticollision roof beam structure, includes the crashproof roof beam body, can with the fixed connecting plate of car and be connected the energy-absorbing box of fixed crashproof roof beam body, connecting plate, its characterized in that, crashproof roof beam body, connecting plate and energy-absorbing box are made by light metal or light metal alloy.

2. The anti-collision beam structure of the light automobile as claimed in claim 1, wherein the energy-absorbing boxes comprise a left energy-absorbing box and a right energy-absorbing box, and the anti-collision beam body, the connecting plate, the left energy-absorbing box and the right energy-absorbing box are made of magnesium alloy materials.

3. The lightweight automobile anti-collision beam structure as claimed in claim 2, wherein the left energy absorption box and the right energy absorption box are made of an A-type magnesium alloy material, the anti-collision beam body is made of a B-type magnesium alloy material, and the connecting plate is made of a C-type magnesium alloy material.

4. The lightweight automobile impact beam structure of claim 3, wherein the strength of the B-type magnesium alloy is greater than the strength of the A-type magnesium alloy; the plasticity of the A-type magnesium alloy is greater than that of the B-type magnesium alloy.

5. The light-weight automobile anti-collision beam structure according to any one of claims 2 to 4, wherein the magnesium alloy material is magnesium-aluminum alloy or magnesium-zinc alloy or magnesium-manganese alloy or magnesium-tin alloy.

6. The lightweight automobile anti-collision beam structure according to any one of claims 2 to 4, characterized in that the magnesium alloy material is prepared by casting or extruding or rolling or forging.

7. The anti-collision beam structure of the light-weight automobile according to any one of claims 1 to 4, wherein the energy absorption box and the anti-collision beam body or the connecting plate are fixedly welded, and the welding mode comprises argon arc welding, laser welding and friction stir welding.

8. The vehicle impact beam structure according to any one of claims 1 to 4, wherein an axis of the crash box coincides with a vehicle advancing direction.

Technical Field

The invention relates to the technical field of light application of transportation tools, in particular to a light automobile anti-collision beam structure.

Background

The light weight of the transportation means is one of important measures for realizing energy conservation and emission reduction, is particularly urgent in the automobile industry, and has important significance for the sustainable development of the automobile industry.

At present, lightweight materials for automobiles are widely applied to automobiles, and the lightweight materials for automobiles mainly adopt lightweight materials and apply advanced process technology, so that the lightweight materials not only can save energy and reduce emission, but also can reduce the research and development cost of automobiles.

The anti-collision beam is used as an important component of an automobile protection device, all parts of the anti-collision beam are made of steel materials generally, so that the anti-collision beam is large in mass and general in anti-collision structure, and the structure, stress, design performance requirements and the like of different parts of the anti-collision beam are different.

Disclosure of Invention

Aiming at the problems in the related art, the invention provides a lightweight automobile anti-collision beam to overcome the technical problems in the prior related art.

Therefore, the invention adopts the following specific technical scheme:

the utility model provides a lightweight car anticollision roof beam structure, includes the crashproof roof beam body, can with the fixed connecting plate of car and be connected the energy-absorbing box of fixed crashproof roof beam body, connecting plate, crashproof roof beam body, connecting plate and energy-absorbing box are made by light metal or light metal alloy.

Preferably, the energy absorption boxes comprise a left energy absorption box and a right energy absorption box, and the anti-collision beam body, the connecting plate, the left energy absorption box and the right energy absorption box are made of magnesium alloy materials.

Preferably, the left energy absorption box and the right energy absorption box are made of A-type magnesium alloy materials, the anti-collision beam body is made of B-type magnesium alloy materials, and the connecting plate is made of C-type magnesium alloy materials.

Preferably, the strength of the B-type magnesium alloy is more than that of the A-type magnesium alloy; the plasticity of the A-type magnesium alloy is greater than that of the B-type magnesium alloy.

Preferably, the magnesium alloy material is magnesium-aluminum alloy or magnesium-zinc alloy or magnesium-manganese alloy or magnesium-tin alloy.

Preferably, the magnesium alloy material is prepared by casting or extruding or rolling or forging.

Preferably, the energy absorption box and the anti-collision beam body or the connecting plate are fixedly welded, and the welding mode comprises argon arc welding, laser welding and friction stir welding.

Preferably, the axis of the crash box coincides with the direction of travel of the vehicle.

The invention has the beneficial effects that:

1. according to the lightweight automobile anti-collision beam structure, when the front collision and the front offset collision happen, the collision energy borne by the upper anti-collision beam body, the left energy absorption boxes and the right energy absorption boxes on the two sides of the cross beam and the lower connecting plate are different, so that the used materials are special-shaped magnesium alloy materials, the anti-collision beams are mainly connected through a welding process, the whole weight is light, the structure is stable, and the problems that the existing anti-collision beams are large in weight and general in anti-collision structure are effectively solved.

2. The automobile anti-collision beam is made of magnesium alloy, has high specific strength, good plasticity, strong shock absorption and good energy absorption effect, and can effectively prevent or reduce the damage of collision to automobile bodies and chassis parts.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 shows a structural schematic diagram of a lightweight automobile impact beam structure provided in an embodiment of the present application.

Detailed Description

For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the invention, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.

In the figure: 1. crashproof roof beam body, 2, connecting plate, 3, left energy-absorbing box, 4, right energy-absorbing box.

As shown in fig. 1, the embodiment discloses a lightweight automobile anti-collision beam structure, which comprises an anti-collision beam body, a connecting plate capable of being fixed with an automobile, and an energy absorption box connected with the anti-collision beam body and the connecting plate, wherein the anti-collision beam body, the connecting plate and the energy absorption box are all made of light metal or light metal alloy. The energy absorption box comprises a left energy absorption box and a right energy absorption box, and the anti-collision beam body, the connecting plate, the left energy absorption box and the right energy absorption box are made of magnesium alloy materials. The left energy absorption box and the right energy absorption box are made of A-type magnesium alloy materials, the anti-collision beam body is made of B-type magnesium alloy materials, and the connecting plate is made of C-type magnesium alloy materials. Compared with the strength, the B type magnesium alloy is larger than the A type magnesium alloy, compared with the plasticity, the A type magnesium alloy is larger than the B type magnesium alloy. The magnesium alloy material can be one or more of magnesium-aluminum alloy, magnesium-zinc alloy, magnesium-manganese alloy or magnesium-tin alloy. The preparation process of the magnesium alloy material is one or more of casting, extrusion, rolling or forging, and can be understood as extrusion or (and) forging after casting, so that the mechanical property of the magnesium alloy can be improved, particularly the strength and the plasticity of the material are improved, and the effect of the anti-collision beam is better. The energy absorption box and the anti-collision beam body or the connecting plate are fixedly welded, the welding mode comprises argon arc welding, laser welding, friction stir welding and the like, and the mode of heat input or mechanical energy conversion is adopted, so that after the materials are melted or softened, two ends of the materials which need to be connected together are combined together in a metallurgical combination mode after physical and/or chemical changes. The axis of the energy absorption box is consistent with the advancing direction of the automobile. The tensile strength of the B-type magnesium alloy is more than or equal to 280MPa, the elongation at break is more than or equal to 6 percent, the tensile strength of the A-type magnesium alloy is more than or equal to 240MPa, and the elongation at break is more than or equal to 7.5 percent. The tensile strength of the C-type magnesium alloy is more than or equal to 200MPa, and the elongation at break is more than or equal to 5%.

The upper anti-collision beam body can be made of a ZK61 magnesium alloy profile, and the main process for preparing the anti-collision beam body is extrusion; the tensile strength is about 310MPa, and the elongation at break is about 7.5%.

The left energy absorption box and the right energy absorption box on the two sides of the anti-collision beam body can be made of a section bar made of an AZ61 magnesium alloy material; the main process for preparing the composite material can be extrusion; the tensile strength is about 255MPa, and the elongation at break is about 8.5%.

The lower connecting plate can be made of AZ31 magnesium alloy material; the main process for preparing the composite material can be extrusion and rolling; the tensile strength is about 220MPa, and the elongation at break is about 5.5%.

The above alloy preparation process is mainly used for improving the alloy performance to achieve the required mechanical properties, and the improvement is not necessarily to improve the mechanical properties, but also to reduce some or all of the performance parameters to meet the required performance requirements.

The middle left and right energy absorption boxes are connected with the upper anti-collision beam body and the lower connecting plate in a laser welding mode, and the lower connecting plate is provided with a mounting hole. The magnesium alloy anti-collision beam is directly fixed on a vehicle through a connecting plate below the beam.

Generally speaking, an impact beam must have good strength, as well as some plasticity. The strength ensures the energy absorbing effect, and the plasticity ensures that the steel cannot be broken quickly. The plasticity requirements of the crash box are relatively high so that sufficient impact energy is absorbed. When in collision, the energy absorption box is firstly collapsed to absorb energy, and then the body is broken or damaged to absorb energy. The connecting plate mainly plays a role in connection and fixation, so that the strength requirement is not high, and the cost is first. The welding strength is not less than 90% of the lower strength alloy. The welding process requires that the weld penetration is realized, namely, the cross section of the energy absorption box, the body and the connecting plate are connected by welding at the joint which is visually seen in appearance, and the false welding does not occur.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.