The wheels of modern cars can be divided into aluminum alloy wheels, iron wheels and carbon fiber wheels according to their materials. At present, most models use aluminum alloy wheels, a few low-end models use iron wheels, and some super sports cars use carbon fiber wheels. . In fact, in the early cars, the wheels used were all iron wheels, but the iron wheels had a very big defect, that is, they were easy to deform and out of round.
The texture of iron is relatively soft, and it is easy to lose round when subjected to greater impact; but it is precisely because iron is relatively soft that it is easier to repair iron wheels after they are out of round. The deformation repair of the iron hub is usually hit with a big hammer and then adjusted on the balancer. This repair method is not only time-consuming and laborious, but also not easy to repair. Therefore, as the iron wheels are gradually replaced by aluminum alloy wheels, the technology of repairing the out-of-round iron wheels has also become a successor.
Aluminum alloy material is not only lighter than iron, but also harder than iron, so it can't be used as a wheel hub. But aluminum alloy is metal after all. High school physics knowledge tells us that metal is malleable, so aluminum alloy wheels will also be out of round. In addition to the high hardness of aluminum alloy, it is difficult to repair by hammering, so it can only be repaired by turning. Turning the wheel hub will make the wheel hub thinner, unable to withstand strong impact, and it is easy to break when encountering potholes, which poses a safety hazard.
There are relatively mature technologies for repairing out-of-round aluminum alloy tires in foreign countries. They use heating to re-place the wheels in the mold to restore them, but it is currently understood that China has not introduced such technologies. Therefore, whether it is an iron wheel or an aluminum alloy wheel, it is not recommended to repair it if it has been out of round, because there will still be safety hazards after the repair.
