Cold forging process of automobile wheel hub

The automobile wheel hub is located at the bottom of the automobile tire and is firm at the bottom of the automobile rotary bearing and tire. It is used for automobile tight connection, emergency braking, braking and other functions. A wide range of processes can be forged and cast.

We all know that the so-called good cars are very expensive. In fact, good cars are expensive. Take a car hub for example. The manufacturing process of the hub on a good car is completely different from that of an ordinary car. Now the manufacturing processes of aluminum alloy wheels on automobiles are mainly divided into casting and forging. After you understand the differences between the two, you can understand why good models prefer forged wheels! Today, the mold manufacturer will talk to you about this problem.

1： What is the casting process of wheel hub

Let's start with the casting process. It may be known that the aluminum alloy wheels on most models are cast. However, there are three different manufacturing processes for casting wheels, namely gravity casting, low pressure casting and spinning casting.

Gravity casting is very simple. Pour liquid metal into the wheel hub mold for cooling and forming. This casting method is very efficient and low cost, but the quality is poor. Because the distribution of various parts of the wheel hub is not very uniform, and the density of molecules inside the metal is low, the strength of the wheel hub is not high, and it is easy to break after collision.

Low pressure casting can be said to be an upgrade on the basis of gravity casting. After the liquid metal is poured into the mold, the low pressure casting process will exert a constant pressure on it. In this way, the molecular density of the metal will be higher, and the wheel hub will have a higher strength after molding. In addition, the low pressure casting process is also very mature. Therefore, most of the wheel hubs on the vehicle models use the low pressure casting process.

The spinning casting is to conduct a secondary processing on the cast wheel hub, heating the wheel hub while rotating and stamping. In this way, the metal molecules in the wheel hub will be closer and the strength will be higher naturally.

2： Forging:

Automobile bearing parts are mainly used as raw materials. The materials at the bottom are fixed for extrusion, and then the other side is rotated for extrusion. The general tonnage is 500t-3000T, and the pressure is mostly 15000kn.