A kind of forging forming method of aluminum alloy wheel with high aspect ratio

Abstract

The invention relates to a forging forming method of an aluminum alloy wheel with a large height-to-diameter ratio, which comprises two forging steps of preliminary forging and final forging, wherein: the preliminary forging step puts a cylindrical blank with a height-to-diameter ratio greater than 3 into a lower die for preliminary forging Inside the seat, the upper die seat for preliminary forging moves downwards. After the upper die seat for preliminary forging falls into the lower die seat for preliminary forging, the upper die seat for preliminary forging stops moving, and the inner hole of the upper die seat for preliminary forging wraps the upper part of the blank, and The forging head continues to move downward, exerting pressure on the upper end of the billet, and the lower part of the billet is gradually deformed by upsetting. After the preliminary forging head is pressurized, the preliminary forging blank is forged and formed; the final forging step puts the preliminary forging blank into the final forging lower die In the seat, the final forging upper die seat and the final forging upper die core move downward, applying pressure to the upper end of the preliminary forging blank, and the preliminary forging blank is further deformed. After the final forging upper die seat and the final forging upper die core are pressurized, the final forging Forged blanks are formed by forging. The advantages are: the forming method has a large forging ratio, the final forging blank has fine grains and compact structure, and improves the mechanical properties.

Description

technical field [0001] The invention belongs to the manufacture of aluminum alloy wheels in the field of nonferrous metal metallurgy, and relates to a forging forming method of aluminum alloy wheels with a large aspect ratio. Background technique [0002] The manufacturing processes of automobile aluminum alloy wheels include casting, forging and casting spinning. At present, China has become the world's largest aluminum alloy wheel manufacturing base. While meeting domestic demand, China also exports a large number of aluminum alloy wheels abroad. It is the world's largest exporter of aluminum alloy wheels. [0003] However, the manufacturing process level of aluminum alloy wheels is still relatively low. Although forged aluminum alloy wheels can be produced, the forging in the production process of aluminum alloy wheels is relatively small. Performance forged aluminum alloy wheels on demand. Especially in the production of forged aluminum alloy wheels, the height-to-diam...

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Problems solved by technology

[0003] However, the manufacturing process level of aluminum alloy wheels is still relatively low. Although forged aluminum alloy wheels can be produced, the forging in the production process of aluminum alloy wheels is relatively small. Demand for Performance Forged Aluminum Alloy Wheels

Especially in the production of forged aluminum alloy wheels, the height-to-diameter ratio of the billet during upsetting deformation is generally less than 2.5, because if the billet with a height-to-diameter ratio greater than 3 is subjected to upsetting processing, longitudinal bending is likely to occur during the deformation process and the deformation will be lost. Stablize

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