Therefore, attractive designs are practically impossible. Manufacturers of forged wheels in the world is not so much. Basically they are released, Russian (VSMPO, smk () KrMZ, bkmpo, Slik) and several foreign companies. It is caused by the enormous costs of equipment manufacture multi-ton press, which in several stages attach casting the desired shape and properties. Some foreign disks receive bypass technology, although declare them as forged. Its essence – hardening of the drive by rolling the rim. Forged wheels is produced by hot pressing with subsequent heat treatment and machining. Production begins with the processing Pressure cast billets for mechanized vertical line of hydraulic presses.
The structure consists of several lines of vertical hydraulic presses 1.6 tonnes, 6 tonnes and 20,000 tonnes, which consistently changes the shape of the original piece. Then the cake mix is sent to thermal treatment, after which the billet is processed on high-precision machine tools with numerical control. Higher price forged wheels due to multiple stages of production and more waste of expensive alloy. Since logging 15-inch disc weighs 30-50 kg. and the output after forging the weight of the finished discs only 6 kg. Forging eliminates the probability of a hidden marriage of metal, which is characteristic for the casting – shells, then. Kovanye drives virtually no corrosion, so sometimes they do not even cover the protective layer of lacquer. Due to what is achieved so highly valued by all consumer properties of forged wheels? During plastic deformation of metal is hardened by grinding the crystal mesh and elimination of internal microdefects.
In view of this forged wheels is much stronger, than steel. In addition, the forging eliminates the appearance of the metal casting hidden cavities, voids and cracks. The walls of the forged wheels can be 20% thinner than the cast. As a result, forged wheels tend to be 15-20% lighter than cast, and by 40-50% fabricated steel. Lighter weight reduces the unsprung mass, much of which make up the wheel. Lung and, consequently, less inertia wheel tracks clearer relief road, sparing suspension, therefore, increases comfort and control. Also easy to stop the wheel quickly while braking and unwind during acceleration, that means improved dynamics and efficiency. Operating experience indicates that the forged successfully resist irregularities and potholes. Split-quality wheel is almost impossible. In the case of a small ‘jams’ it can be restored, although it must be remembered that any impact on the wrought product is still violates its structure. Further details can be found at Ford, an internet resource. Alloy wheels made of aluminum alloys prepared by casting under low pressure-regulated or casting with counterpressure. The main reason for their popularity – relative cheapness. Cost of CDs produced by casting technology, approximately 2-3 times smaller than the forged. And releasing them more than a dozen manufacturers. In rallistov athletes from the former ussr, as well as domestic market auto parts popular Russian-made forged wheels. They are produced on production lines, which produces wheels for military fighter jets and heavy transport aircraft. By t