In the process of refitting the wheel hub, many car owners will have difficulties and will not know how to choose. The wheel hub can be roughly divided into forging and casting processes according to the manufacturing process. Forged wheels can be classified into single-piece and multi-piece (two-piece and three-piece) according to their structure. So what is the difference between forged single-piece and multi-piece? What does it mean to separate?
Single-piece forged wheel: As the name suggests, the wheel is a single body.
At present, there are two main processes for single-piece forged wheels:
Forming forging is also called die forging. After forging, the shape of the wheel hub has been basically formed. This process can greatly save processing time and cost. The disadvantage is that the mold is very expensive, which is not something that some domestic small workshops can afford. The famous wheel brand BBS Forged wheels are produced using this process.
Milling and forging, this is to buy ready-made forged wheel blanks (there is a manufacturer specializing in this) and then mill the shape of the wheel through a CNC machining center.
Because the threshold is lower than that of forging, and the forged wheels are becoming more and more streamlined among the car players, expensive brand forged wheels are not acceptable to everyone. Therefore, the forged wheel brands that have adopted the milling and forging process have sprung up in the past two years. Appeared, which also greatly lowered the entry barrier for forged wheels. Common molded single-piece forged wheel brands: BBS, HRE, OZ, RYS, ADVAN.
What is multi-piece forging?
Two-piece forging can be simply understood as consisting of two components, consisting of two parts: the hub and the spokes.Three-piece forging, composed of three components, the rim part of the three-piece wheel hub is composed of the front piece and the back piece. Therefore, the three-piece forged wheel consists of three parts: the front piece, the back piece and the spokes.
On the other side of the ocean, the United States is rich in three-piece forged wheels, such as ADV.1, Forgiato, Giovanna and so on. But to be honest, the three-piece forged wheels in the United States are still very cool.
There are currently two main ways to connect the spokes of the multi-piece forged wheel hub to the rim:
The connection of special bolts or nuts is as follows:
Welding, the special process of the well-known Japanese wheel brand WORK
As for the three-piece wheel hub, since the rim is composed of two parts, the front piece and the back piece, it must be sealed with glue after assembly to ensure airtightness. It is connected without welding or bolts.
A brief introduction to single-piece wheels and multi-piece wheels, so how to choose? It is necessary to analyze the advantages and disadvantages of these two types of wheels.
The advantage of single-piece wheels is that they are lighter than multi-piece wheels. Often the extremely lightweight wheels must be single-piece wheels. This is also what consumers value. Why buy forged wheels? Because it is lighter, and the single-piece wheel is better than the multi-piece forged wheel hub in terms of dynamic balance, and the reliability is also stronger. , No need to worry about the hidden danger of air leakage. The disadvantage is also very straightforward, that is, the single-piece forged wheel has a relatively simple style and a relatively simple shape.
A large part of the popularity of multi-piece wheels is that some people in the car-player group now have the appearance of walking, and those who play with appearances and postures all like wheels with many styles and patterns. And the rim part of the multi-piece forged wheel hub can be shared. To change the shape of the wheel hub, you only need to change the middle plate of a different style. Just like a pair of shoes, you don’t need to buy a new one, you only need to replace the upper, and the sole does not need to be replaced. This is the same reason. Through different sizes of rims and spokes, multi-piece forged wheels can be combined into a variety of different wheel specifications at will, adapting to the current needs of personalized modification. I think this is the biggest advantage of multi-piece wheels. The disadvantage is that the dynamic balance is not as good as the monolithic type, the weight is heavier than the monolithic type, and there is a problem of sealing.
