Automobile anti-collision beam and preparation method of automobile anti-collision beam

Abstract

The invention provides an automobile anti-collision beam and a preparation method of the automobile anti-collision beam. According to the automobile anti-collision beam and the preparation method of the automobile anti-collision beam, the requirements of collision energy absorption and bending stiffness of the automobile anti-collision beam are met, and the requirement of light weight is further met. The automobile anti-collision beam comprises an aluminum profile body and a carbon fiber reinforcing piece; the aluminum profile body is integrally of a long-strip shaped structure with a radian,an outline of a cross section of the aluminum profile body is of a sealed structure, and a plurality of first connecting holes are formed in the side surface, connected with the carbon fiber reinforcing piece, of the aluminum profile body; the carbon fiber reinforcing piece is integrally of a long-strip shaped structure consistent with the radian of the aluminum profile body, and the carbon fiberreinforcing piece is embedded in the aluminum profile body and a plurality of second connecting holes matched with the first connecting holes are formed in the one side surface, connected with the aluminum profile body, of the carbon fiber reinforcing piece; and the aluminum profile body is connected with the carbon fiber reinforcing piece through fastening pieces connecting a group of the first connecting holes and the second connecting holes simultaneously.

Description

technical field [0001] The invention relates to the technical field of automobile bodies, in particular to an automobile anti-collision beam and a preparation method thereof. Background technique [0002] Automobile crash safety is a matter of life and death for passengers. The front and rear anti-collision beams of automobiles are the safety structural parts that first contact the collision object, and their reliability largely determines the damage value caused by the collision. The design of automobile anti-collision beams is a multi-objective optimization subject. It must not only consider the collapse to absorb as much energy as possible, but also resist deformation and reduce the intrusion of collision objects, and also consider the demand for lightweight body. In an offset collision (ODB) or column collision, the anti-collision beam cannot be broken, and the force needs to be transmitted to both ends of the longitudinal beam more evenly. [0003] In the prior art, t...

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Problems solved by technology

[0003] In the prior art, the beam has the following characteristics: 1. If thermoforming materials are used, a closed cavity cannot be formed, the rigidity will not be too strong, and the energy absorption is small; 2. If high-strength rolled steel is used, although a closed cavity can be formed 3. If the aluminum alloy technology is used, although a closed cavity can be formed with better energy absorption, brittle fracture is prone to occur; 4. If the aluminum alloy and carbon fiber composite technology is used: such as Chinese patent application CN201711107568. 3 The proposed aluminum alloy is interlayer and covered with carbon fiber, which can greatly improve the performance, but firstly, it is difficult to stretch and bend, which is not good for the layout and collision effect; secondly, the carbon fiber is fully covered, which is difficult and expensive. high

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