How many manufacturing methods are there for wheel hubs?

[Lucy]

Wheel hubs have three manufacturing methods: gravity casting, forging, and low-pressure precision casting. Here are the detailed introductions: 1. Gravity casting method: The aluminum alloy solution is poured into the mold using gravity, and after forming, it is processed and polished by a lathe to complete production. The manufacturing process is relatively simple, does not require precise casting technology, has low cost and high production efficiency, but it is prone to bubbles (sand holes), uneven density, and insufficient surface smoothness. 2. Forging method: The entire aluminum ingot is directly extruded into shape on the mold by a thousand-ton press. The advantage is uniform density, smooth and fine surface of the finished product, thin and lightweight hub wall, and the highest material strength, which is more than 30% higher than casting methods. 3. Low-pressure precision casting method: Precision casting is performed under low pressure of 0.1Mpa. This casting method has good formability, clear contours, uniform density, and smooth surface. It can achieve high strength and lightweight while controlling costs, and the finished product rate is over 90%.