The low-pressure wheel hub is named after the casting process. This process is suitable for mass production. Because of the high success rate of the finished product, most automobile manufacturers specify this process.
Wheel hub, English name: Car Rim, a cylindrical metal part used to support the tire with the shaft as the center in the automobile tire. In layman’s terms, it is the part where the axle is installed in the center of the wheel and is connected to the brake drum (brake disc) and the wheel disc. And important parts of the axle shaft.
When many car users upgrade their tires, they often ignore the importance they attach to the wheels. If you compare a car to a person, the tires are shoes and the wheels are feet. Wheel hubs are also called rims, and Guangdong, Hong Kong and Taiwan regions are called car bells. The most commonly used method to upgrade car wheels is to use aluminum alloy wheels, or to use larger wheels to improve car performance and appearance.
According to different manufacturing methods, wheels are mainly divided into two categories: Casting and Forged. Casting is divided into two types: Gravity Casting and Low Pressure Casting. Forged wheels can be divided into two types: one-piece forged wheels and multi-piece forged wheels.
- Gravity casting
Gravity casting is to pour the liquid alloy into the mold to cool and form. Due to the simple manufacturing process and the durable mold, it has become the lowest cost manufacturing method. But the quality is not very good, because each part of the wheel hub is not necessarily evenly distributed, the molecular pores inside the metal are larger, and the strength is also reduced a lot.
- Low pressure casting
Low-pressure casting is to press the liquid alloy into the mold with a smaller pressure, so that the distribution of molecules is even, there are fewer sand holes, and the shape can be more complicated and delicate. To ensure the density of the liquid metal, but also to ensure the strength of the metal after solidification. The low-pressure casting process is all completed by machinery, and the yield rate of casting molding is high, which is very suitable for mass production. At present, the cast aluminum alloy wheels designated by automobile manufacturers are all produced by this process.
Low-pressure hub
- One-piece forging
One-piece wheel hub means that the entire wheel hub is a whole. Forging can be divided into two processes, forming forging (die forging) and milling forging. Forming forging means that after forging, the shape of the wheel has been basically formed. Milling and forging means buying ready-made forged wheels. The blank is then milled through a CNC machining center to form the shape of the wheel. The one-piece wheel hub is light in weight and can be the lightest, with good dynamic balance, good reliability, and no hidden danger of air leakage, but the shape is relatively simple.
- Multi-piece forging
The multi-piece forged wheel is composed of two parts: the rim and the spoke. The rim part of the three-piece forged wheel hub consists of two parts: the front piece and the back piece, so the three-piece wheel hub is composed of three parts: the front piece, the rear piece and the spokes. The multi-piece rim part can be shared, so the shape can only be replaced by the middle plate, which can match the spokes and rims of different sizes, so there are more shapes. But the weight is heavier, the dynamic balance is not as good as one piece, and the assembly requirements are also higher.The copyright belongs to the author Website of China wheels www.jihoowheels.com .