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Why Are The Aluminum Wheels So Different?

Jan. 13, 2020

In the past, China adopted a relatively conservative attitude towards the car modification industry. In recent years, although the car modification industry has not formed a standard, the policy has relaxed its attitude towards car modification. It not only opened the restrictions on body color and front and rear surrounds, but also Aluminum Alloy Wheels styles can also be changed (requires original dimensions). For some car owners who pursue individuality, this is undoubtedly good news.


Aluminum Alloy Wheels


Aluminum Alloy Wheels


Because the unsprung mass is related to the response speed of the wheel, in the currently allowed modifications, upgrading the wheel hub will have a greater impact on the performance of the vehicle. And even for wheels of the same size, when different materials and processing techniques are used, their mechanical properties and weight will vary greatly. In terms of materials, aluminum alloy is naturally superior to steel. So do you know about the various processing technologies of aluminum alloy wheels?


Let the Aluminum Alloy Wheels Supplier tell you.


1. Gravity casting

Gravity casting is to make liquid aluminum fill the entire mold under the action of gravity. Although this production process is cheap and simple, it is difficult to ensure the consistency inside the rim, and it is easy to produce bubbles, and its strength and yield are relatively low. This technology has been slowly phased out.


2. Low pressure casting

Low pressure casting is a casting method that uses liquid pressure to press liquid metal into a mold and makes the casting crystallize and solidify under a certain pressure. This method allows the liquid metal to fill the mold quickly, because the air pressure is not too strong, so the metal density can be increased without involving air. Compared with gravity casting, the low-pressure cast wheel has a denser internal structure and higher strength. Low pressure casting has high production efficiency, high product qualification rate, good mechanical properties of castings, high utilization of aluminum liquid, and is suitable for large-scale supporting production. At present, most of the low-end and Low Pressure Aluminum Alloy Wheels use this process.


3. Spin Casting

Spin casting is based on gravity casting or low-pressure casting. The rim is gradually elongated and thinned by the rotation of the aluminum alloy itself and the extrusion and stretching of the rotary knife. After the rim is hot-spun, there are obvious fiber flow lines in the structure, which greatly improves the overall strength and corrosion resistance of the wheel. Because of the high strength of the material, the light weight of the product, and the small molecular gap of the material, it is a well-received process on the market.


4.Integrated forging

Forging is a processing method that uses a forging machine to apply pressure to a metal blank to cause it to plastically deform to obtain a forged piece with certain mechanical properties, a certain shape and size. After forging, the aluminum billet has a more dense internal structure. At the same time, the forging process can better heat-treat the metal and obtain better thermal properties.


5. Multi-piece forging

Integral forging requires cutting a lot of extra dimensions, and its processing time and price are relatively high. Multi-piece forged wheels are divided into two and three pieces. The former consists of spokes and rims, and the latter consists of front, rear and spokes. Due to the seam problem of the three-piece wheel hub, sealing is required after assembly to ensure air tightness.


6. Squeeze casting

The forging process is convenient for processing complex-shaped parts. This process involves pouring liquid metal into an open container, and then a high-pressure punch presses the liquid metal into a mold, which is filled, shaped, and cooled to crystallize. This processing method effectively guarantees the compactness of the interior of the wheel hub, and the mechanical properties are close to the one-piece forged wheel hub. At the same time, the remaining material that needs to be cut will not be too much.

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