Advantages of Spinning Technology Applied to Automobile Wheel Hub Manufacturing

03/05/2023
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The process is forging-annealing-spinning-heat treatment-machining-surface treatment (spraying or electroplating) process, the key technology is metal spinning processing, which belongs to the fine and clean shape of materials, and the formed products have high precision. Compared with cast materials, the structure is denser and stronger high. It is mainly aimed at the wheels made of aluminum-magnesium alloy, which has become a strong competition point for steel wheels due to its beautiful appearance, light weight and high strength.

The traditional hub manufacturing process is casting (casting or vacuum casting) at a lower pressure (generally 20-60KPa) - heat treatment - mechanical processing - final surface treatment, this method is suitable for mass production, high productivity, high pass rate , The utilization rate of aluminum liquid is high, but the surface quality is not good, the cost is slightly high, and the technical difficulty is high. However, the wheel hub produced by forging-annealing-spinning-heat treatment-machining-surface treatment (spraying or electroplating) process method is greatly improved. It improves the manufacturing precision, has a denser metallographic structure and better mechanical properties, and is easy to meet the strength requirements such as the variable wall thickness of the wheel hub. It is also light in weight, smooth in surface and greatly reduced in machining allowance.

Wheel spinning can generally adopt three process methods: plate split spinning, prefabricated forging billet spinning, and seamless pipe reducing diameter spinning. The split spinning process is to use the splitting wheel to pass the disc-shaped slab through the layering process, so that the blank is split into two parts in the middle of the thickness direction, and then the forming wheel is used to gradually spin it into shape; the forging billet strong spinning process is The forging billet is subjected to several passes of strong rotation, so as to meet the size requirements of the rim profile.

Summary of advantages:

1) Save raw materials

2) Extend the service life of automobile and motorcycle tires

3) The quality of the inner and outer surfaces of the wheel is good, and the follow-up finishing process is disordered, which reduces the process

4) Realize the strength requirements such as variable wall thickness, and the strength performance is good

5) Beautiful appearance

6) Cost savings

7) Broad market prospects

8) It is an advanced special forming technology, and it is one of the few methods for forming large-size wheels at present, with large profit margins.