Automobile hub isothermal forging and spinning forming process

Abstract

The invention relates to an automobile hub isothermal forging and spinning forming process which mainly overcomes casting defects of proneness to shrinkage and looseness, low mechanical property and the like of a traditional metal mold casting blank forming method and overcomes the shortcoming that an automobile hub is large in machining allowance, high in production cost and difficult in wide application. The technical scheme includes that the process includes: cutting an aluminum alloy rod to a blank; preheating the blank to the temperature of 460 DEG C to 500 DEG C and then keeping the temperature for 1 hour; forging and pressing the blank for 3-4 times under a forging press to manufacture a pre-forging blank; preheating a die; placing the pre-forging blank into the forging die (controlling the die temperature at 400-450 DEG C) under a 1500t forging press, and performing isothermal forging for 2-3 times again to enable an aluminum alloy hub to be formed primarily; and spinning for precise forming. By the forming process, product manufacturing precision and strength are enhanced, and the forming process belongs to precise forming and is capable of effectively saving production cost and improving mechanical property of the hub.

Description

technical field [0001] The invention belongs to the field of automobile manufacturing, and in particular relates to an isothermal forging and spinning forming process of an automobile wheel hub. Background technique [0002] As limited energy resources are decreasing year by year and energy prices are rising, in order to reduce fuel consumption, the lightweight design of automobiles has been highly valued. Aluminum alloy wheels are usually produced by casting or die-casting. Conventional casting methods, whether it is differential pressure casting, low-pressure casting or gravity casting, all cause the mold cavity to The gas cannot be exhausted, which leads to the lack of compact structure of the product blank, which is prone to loose, pinch and other casting defects. The manufacturing cost is high, and the consumption of energy and raw materials is large. The mechanical property of product and the surface quality of casting also can't be satisfactory. [0003] The use of ...

AI Technical Summary

Problems solved by technology

Aluminum alloy wheels are usually produced by casting or die-casting. Conventional casting methods, whether it is differential pressure casting, low-pressure casting or gravity casting, are due to the high-speed turbulent movement of the alloy liquid filling the mold. The gas cannot be exhausted, which leads to the lack of compact structure of the product blank, which is prone to loose, pinch and other casting defects. The manufacturing cost is high, and the consumption of energy and raw materials is large.