Monday, August 29, 2011

Power bumpers: an elephant in a china shop

One of the stages in the preparation of an SUV to travel on the road - to set the reinforced bumpers. The choice of firms engaged in mass production and installation of such devices is extremely small. And among them is necessary to distinguish those who offer reinforced bumpers for intimidation, and those whose bumpers come to help in difficult situations. Power bumper can be installed only by a frame vehicle, the remaining bodies impact of it will be weaker. Bumper mounted on vehicle for mitigation of impacts or collisions. Conventional bumpers that are mounted on cars for a "civilian" trips in urban areas, the maximum absorb the impact force, thereby reducing damage to the car from a collision. Manufacturers did not intend that the bumper will keep beating on the branches, bushes, trees and even rocks, and therefore in such circumstances, the factory bumpers will not last long. Dzhipery found out - if so with civil bumper not really run away (that is, especially not go far over bumps and potholes), you can replace it reinforced. Especially, it is convenient to owners of cars frame, which can not use the jack rack, since there is no direct access to the frame - they can raise the car behind the bumper. But all is not rosy, the power of bumpers has its disadvantages, namely the serious consequences in case of collision with objects more durable than the trunks of young trees. Unfortunately, not all reinforced bumpers, due to its stiffness can absorb impact energy with a strong object. In the event of an accident with a vehicle bumper force can destroy a cancellation, in whom he hit, not to mention the pedestrians. A collision with a concrete pillar has a crushing force, dangerous for the engine mounting and the body, but most importantly - to sit in it people. This problem is usually solved by fasteners that are designed to destroy in the event of severe impact, but the precise calculations and measurements must be made at the highest level. Front and rear bumpers are made of heavy-duty single piece of bent. Welding in this case only hurts construction, as the seams can not boast of similar strength with a solid metal, as well as in places of welding is formed faster corrosion. Mainly on the power bumpers are special grounds for jack (Hi-Jack) and mounting the winch. Most often, the front bumper "concealed" in the front kenguryatnik to protect the radiator and headlights, as well as for fixing vetkootboynikov (strung on the side ropes to protect the windshield from the impact of branches). Rear bumpers are also equipped with platforms for the winch, and sometimes by special fixtures for the spare wheel (the gate). On the gate can be made compartments for the carriage of jacking, gas canisters, a box with tools and other necessary things, and sometimes it was converted into a small ladder to the roof. Point of attachment of bumpers are chosen so as to cause minimum changes in the body, that is, this work takes a little time. Bumpers are mounted to the frame (or to the side members, if not the frame). For each model produced separate power bumper taking into account peculiarities of its body - the location of lights, frame size ... But unfortunately, this involved only Western companies for domestic and Neave UAZ design and construction of reinforced bumpers come up garage Kulibina. Usually, their job is to find imported analog and adapting it to the car the customer. The difference lies not only in price (foreign manufacturers rate their products at times of a few hundred dollars), but also as a result - is still hard on the knee in the garage to calculate the power stroke in the event of an accident and its consequences for both cars and passengers or pedestrians . After all, the role of the bumper is to take the main force of the blow and his maturity and strength bumper passes this power through itself and vent it to the body or other vital organs of the car. Often, domestic firms or private owners do not force bumpers from a single sheet of iron, and pieces of channel bars by welding. Subsequently, the cheapest and easiest way implies into rust. In addition, mounting homemade bumper anyhow, "if only hung" has no relation to the calculation of the strength of this design and the destructive forces in the event of impact. Although there are cases of successful installation of the power components on the bumpers, it depends on a wizard that does the job. It is precisely those firms that in our country can be counted on the fingers (or well-trained craftsmen in the garage with lots of special equipment). In such cases, the bumpers are made by analogy with Western firms for a specific model, as well as taking into account the wishes of the owner of the car. The value of their work is much more expensive, but quality is higher. But they do not offend attention of domestic models.

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