1. Built-door side impact protection beam
side door impact beam (lever), also known door beam (lever), which is English Side Impact Beam, Door Beam, etc., means plus the internal structure of the door beam (and see from the outside) to the side of the reinforcing structure of the vehicle, thereby increasing the resistance when a side impact collision to enhance the safety side. Based on the probability of side impact, consumers choose a car, be sure that the side-impact steel beams an important security configuration into account.
According to the survey, all the cars in the collision mode, the side impact accounted for about one-third. So, how to protect the safety of the driver’s side impact is very important. Door crash as an additional energy-absorbing protection, can reduce the force from outside the passenger may suffer. Proved door beam strikes a fixed object in the vehicle (for example trees) protective effect is obvious. According to the US National Highway Traffic Safety Administration NHTSA released, door beam in 2002 saved 994 accident victims.
The door beam shape: tubular and generally divided into two kinds of hat-shaped; ends (CJK vehicle used generally tubular door beam with a bracket for fixing the connection with the door impact beam , and usual Western car door impact beam hat-shaped (generally welded directly to the door); a tubular bumper beam main pipe, also rectangular tube quincunx tube, oval tube, of course, that many factors to consider , such as a door interior space; and a cap-shaped bumper beam mainly single cap shape (U-shape) and a shape of a cap-bis (m-shaped);
arrangement of the door beam: most common diagonal line arrangement, there are vertically arranged
door beam absorbing energy mainly related to the following factors:
1, structural design; this is the most important point, generally , the energy absorption effect of the impact beam is a hat-shaped tubular better than the impact beam; in addition, the double hat-shaped configuration generally better than a single cap structure; of course, the capHeight, shape and configuration of A / B / C pillar, rocker, etc. so critical matching;
2, strength of the material; People often think that the ordinary water inside the pipe or the like is, in fact, otherwise; the tensile strength of the pipe is generally used in the Japanese and Korean cars up 1400-1600MPA (currently some domestic brand car with the more common tube), more than four times the normal strength of the pipe, its energy absorption effect is common pipe 2 times more; the tensile strength of the common Western vehicle bumper beam of generally hat-shaped reached 1400MPA;
3, the thickness of the material; of course, the thicker the material, the better energy absorption (not consider a / B / C pillar, rocker matching), absorbing energy proportional to the thickness and materials.