1, Glossary
Significance vehicle front bumper beam is first subjected to the impact force means
2, the effect of the impact beam
everyone know of a triangle is the most stable structure, and the body frame is actually composed of many irregular triangle composed to withstand the impact from all sides, but it should be noted that, the car’s skeleton is not endurance are the same everywhere,
as it relates to the conductance of the crush and the like. We can see from the figure, the different colors representing different yield strength of the material, red for ultrahigh strength steel, the yield strength of the material, there is less yellow, pink and the yield strength of the lowest portion, which mainly plays absorbing crumple the role of energy.
Significance vehicle front bumper beam is first subjected to impact force means, in the passive safety body an important concept is that the force body force. It means a certain position of the automobile body by the impact, if only to make this part of the affordability of the case, then reach the protective effect will be poor. If at some point, when subjected to a force, to bear the entire force of the skeleton structure, it is possible to maximize the reduction of the intensity of a point is subjected to a force, especially on the front bumper beam where it plays a significant role.
We can see in this structure, both ends of the bumper beam is connected to the low-speed low yield strength of the crash box, and then connected to the vehicle body side member in the form of a bolt on. Low energy absorption cassette can effectively absorb the collision energy at the vehicle low-speed collision, the impact force is reduced as far as possible damage to the vehicle body side member, which can reduce maintenance costs, and the embodiment may be bolted to the impact beam easier replacement .
In a high-speed offset collision, the impact beam can be effectively impact force transmitted from the vehicle body left side (or right) to the right (or left), as far as possible the entire vehicle body to absorb the impact energy. In the low-speed collision occurred(Normally at 15km / h or less), the impact force of the impact beam to avoid damage to the vehicle body side member, reduce maintenance costs.
3, the structure of the standard impact beam
The figure is a comparison of standard impact beam structure, the low energy absorption cassette effectively absorb impact energy at a low speed by the collapse, the impact beam bolted to the vehicle body, to facilitate removal and replacement. Now many models are fitted with anti-collision beam with a layer of foam buffer, its main role in the event of a collision / h less than 4km, external plastic bumpers play a support role in mitigation of the impact force, reduce collision damage to the plastic bumper, lower maintenance costs.
4 summarizes
role
impact beam is mainly used to reduce maintenance costs during low-speed collisions, and can reduce the harm to members of a certain extent. Under the existing structure of the car, like a car crash beams of the same tire must have, any cancellation, shrink or Jane with only the manufacturer’s instructions for consumers is irresponsible.