In the process of daily use, the frequency of wheel hub abrasion and damage is still very high, and almost every car owner will have some degree of wheel hub abrasion after using the car for one to two years. The cost of replacing a new wheel hub is too high when the hub is slightly damaged. The wheel hub repair effect is obvious and the price is reasonable, making it a good choice. So what are the common types of wheel hub damage?

Generally speaking, there are three types of wheel hub damage

One surface damage

Mainly caused by surface wear and abrasion of the wheel hub.

II Wheel hub deformation

As the name suggests, it refers to the deformation, twisting, and loss of roundness of the wheel hub under external force.

III Fracture damage

When the wheel hub experiences a strong impact, it may break or break to varying degrees.

How to repair these three types of injuries?

One Surface damage repair

Wheel hub surface repair

The common damage to the wheel hub is mainly scratches and abrasions, and the repair only involves surface treatment, which basically does not affect the main load-bearing structure of the original wheel hub, and has little impact on the reliability and safety of the wheel hub.

The repair steps are as follows:

The first step is to polish:

After most of the wheel hubs are treated with dust-free sandblasting, they are then polished again with a relatively delicate water sandpaper for details. This part belongs to delicate work, patience is very important.

Step 2, apply putty:

After the wheel hub is polished flat, use alloy putty to fill in the scratches. This step is easy to understand, and it is the same as filling in with atomic ash for automotive sheet metal painting. The alloy atomic ash used on the wheel hub is harder and finer than the ordinary atomic ash used on car sheet metal.

Step 2 of repair: "Apply putty"

This is not our putty for repainting, but a specialized metal atomic putty, also known as sheet metal putty.

The names of products from different brands may vary slightly. There are many types of atomic ash, such as plastic atomic ash, fiberglass atomic ash, sheet metal atomic ash, and so on.

You can simply understand: this is various "soil filling" for different materials.

Step three, polishing:

After filling, use an angle grinder to polish the excess uneven parts.

Atomic ash needs to be used in conjunction with corresponding curing agents, and after smoothing, it needs to be relatively polished to make it completely flat for subsequent painting. Of course, if your dents are deep, you need to use aluminum welding to repair them. Atomic ash mainly targets most minor damages.

Step 4, Painting:

After the surface treatment is completed, it is time to spray paint.

Painting is also the most technically challenging step.

Step 5, Drawing:

If there is a metal wire drawing process on the surface of the wheel hub, conventional polishing will not work. It is necessary to use a wheel hub drawing machine for precision machining until all scratches disappear.

Step six, dry:

After the primer is completely dry, it needs to be sprayed with clear varnish (topcoat, gloss oil, gloss oil) for protection.

Finally, dry the oven at high temperature for 20 minutes

Step 7, Polishing:

The repair process of the wheel hub is basically over. In order to make the appearance of the wheel hub look more brand new and beautiful, the polishing machine is started to use two types of abrasives, coarse and fine, to perform the final polishing of the wheel hub.

II Deformation repair:

When a car wheel hub is hit or collided, it is easy to cause phenomena such as bending and deformation of the wheel rim, which belongs to serious damage.

The general process for repairing such damage is: deformation position detection heating correction completion. However, the material of the wheel hub is aluminum alloy, which has relatively poor resistance to metal fatigue. After being deformed by external forces, it is forcibly restored to its original state by external forces. Even if there are small cracks on the surface that cannot be observed by the naked eye, from a scientific perspective, the metal structure here is completely different from that of a normal wheel hub.

1. Deformation position detection: First, locate the deformation position of the wheel hub, install the wheel hub on the fixture, use a correction needle disk, and locate the deformation position for calibration.

2. Heating: Use a blowtorch to locally heat the deformed area. The small red dots on the wheel hub are infrared thermometers, and heating can be stopped once a certain temperature is reached.

3. Correction: After reaching a certain temperature, the wheel hub becomes soft, and a small hydraulic jack is used for repeated slight correction. Finally, meet reasonable standards.

3： Wheel hub fracture

This type of wheel hub damage is the most severe. Although wheel hub fracture can be repaired by welding, its safety performance is greatly reduced.

The normal manufacturing process for wheel hubs is casting. It is the gradual cooling or crystallization of metals in a molten state under pressure. And welding is a process of locally heating, melting, and then solidifying. And there must be weld stress around the weld seam. After a period of load operation, it is highly likely that fatigue cracks will occur in the high stress area of the hub, leading to serious consequences such as fracture. So, if the wheel hub breaks, it is not recommended to repair it and should be replaced directly. After all, the wheel hub is a safety component and has a significant impact on safe driving.