Global Business Group HIHO

Technolgy tendency of aluminum wheel hub

Design requirements for aluminum wheels

In order to meet the use function and the market demand, the aluminum wheel hub in the structure has the integral type and the multi piece combination type design; there are wide spokes, narrow spokes, multi spokes, less spokes in shape design; there are painting, bright surface covered with transparent lacquer, polishing coating, electroplating and other in appearance; the painting colors contain Sports silver, fine silver, bright smoke gray, black. And large scale, high strength, lightweight, flexible, beautiful are developing tendency in the future.

Shaping process of aluminum wheel hub

Inshaping technology, there are gravity casting, low pressure casting, squeeze casting, semi-solid casting, forging, spinning forming and combinations of these, etc. Extrusion casting and semi solid casting technology can improve the microstructure of materials and improve the mechanical properties of the products. It is especially suitable for the manufacture of large size and lightweight aluminum wheel hubs. The spinning forming technology is developed on the basis of the hot forging process. The aluminum wheel hub is formed by spinning process after forging. In recent days, a new concept of lightweight aluminum wheel hub - built air aluminum wheel hubs come out. It further reduces the weight of the wheel hub by 20% through the cavity technology.

Materials of aluminum wheel hubs

Aluminum wheel hubs use material including AlSi series alloy(AlSi₇Mg、AlSi₁₁、AlSi₁₁Mg、AlSi₁₂Mg ), 6061 wrought aluminum alloy. Among them, Sr modification uses the most( accounting for about 90％).

Development trend of aluminum wheel hub manufacturing technology

Aluminum wheel hub is developing to large diameter, lightweight, high strength and beauty etc. Besides, technology of aluminum wheel hub manufacture is mainly developing to be automatic, intelligent, material-saving, energy-saving and environmental. Specific measures are as follows: Liquid aluminum alloy straight conveyor production site, liquid aluminum refining, aluminum liquid thermal analysis, oblique inserting type low-pressure casting mold, automatic X-ray inspection, helium automatic test leakage, dry machining, high-speed electrostatic rotary cup of spray gun and chromium free treatment, powder coating and waterborne paint and other new techniques.