A hub is a cylindrical, axle-mounted metal part of a tire's inner rim that supports the tire. Also known as wheel rim, steel rim,Wheel, tire bell. Hub according to the diameter, width, molding way, different kinds of materials.

A hub is also called a rim. According to the characteristics and needs of different models, the wheel hub surface treatment process will also take different ways, can be roughly divided into baking paint and electroplating two. Ordinary models of the wheel in the appearance of less consideration, good heat dissipation is a basis

This requirement, the basic process of baking paint processing, that is, first spraying and then electric baking, the cost is relatively economic and the color is beautiful, protect

Holding time for a long time, even if the vehicle scrapped, the color of the hub is still the same. Many Volkswagen model wheel hub surface treatment process

Is the lacquer that bake. Some fashion-forward, dynamic colored wheels are also painted with paint. These wheels are affordable,

The specifications are complete. Electroplating wheel is divided into silver electroplating, water electroplating and pure electroplating and other types.

There are three manufacturing methods of aluminum alloy wheels: gravity casting, forging and low pressure precision casting.

1. Gravity casting method uses gravity to pour the aluminum alloy solution into the mold, after forming the lathe processing and grinding, you can

Complete production. The manufacturing process is simple, does not need precise casting process, low cost and high production efficiency, but easy to produce

Bubbles (trachoma), density is not uniform, the surface smoothness is not enough. Geely has quite a few models equipped with this approach

The production of wheels, mainly early production models, new models have been replaced with new wheels.

2. Forging method The whole aluminum ingot is directly extruded on the mold by a thousand ton press, which has the advantages of uniform density and surface

Smooth and meticulous, thin hub wall and light weight, high material strength, more than 30% higher than the casting method, but because of the need to be more precise

Good production equipment, and the yield is only 50 to 60 percent, high manufacturing costs.

3. Low pressure precision casting method in the low pressure of 0.1Mpa precision casting, this casting method of good formability, clear contour

Clear, uniform density, smooth surface, not only can achieve high strength, lightweight, and can control the cost, and the rate of finished products in 90%

The above is the mainstream manufacturing method of high quality aluminum alloy wheel.