Method for rolling and shaping aluminum alloy special-shaped ring forging

Abstract

The invention discloses a rolling and shaping method for an aluminum alloy heterotypic ring forging in order to obtain the alloy heterotypic ring forgings with excellent tissues and properties as well as realize accurate rolling. The method includes the following steps: alloy bar material is heated, carried out continuous upsetting and deformed by 50 to 55 percent, so as to be made into a solid cake and then is punched again to lead the alloy bar material to be made into a hollow round cake after the aperture dimension of the alloy bar material is 30 to 35 percent of the dimension of the outer diameter thereof; a rectangle pre-rolling blank is obtained after the hollow round cake is heated, rolled circularly and deformed by 40 to 45 percent; the pre-rolling blank is heated and arranged in a rolling die of a ring rolling machine and forms a heterotypic ring forging after being rolled and deformed by 50 to 55 percent in a section groove. When in expansion, the broadening speed of the pre-rolling blank along the radial direction is 2mm / s to 15mm / s with a radial rolling force of 20000kg to 120000kg. The method is mainly used for the shaping of the heterotypic ring forging of an aeroengine. The method can be adopted to obtain the heterotypic ring forging that is arranged in a flow line along the outline of a part.

Description

technical field [0001] The invention relates to a rolling forming method for a ring forging, in particular to a rolling forming method for an aluminum alloy special-shaped ring forging. Background technique [0002] Special-shaped ring forgings of aero-engines made of aluminum alloys (such as US 2014 and other material grades), such as ferrules and other parts, require forgings to have good performance and organizational stability due to long-term work in harsh environments. [0003] The Chinese invention patent specification CN 1586754A published on March 2, 2005 discloses a method for rolling and forming a ring with an outer stepped section. The longitudinal section of the ring is a non-rectangular outer stepped shape, that is, the ring It belongs to a special shape of special-shaped ring forgings. The method includes blanking, billet making, rolling and subsequent processing. The special-shaped ring rolled by this method is a pass directly formed by the main roll (ie the...

AI Technical Summary

Problems solved by technology

When using this process to roll special-shaped rings of different shapes, the roll type needs to be replaced again, and frequent change of roll type will increase manufacturing costs, prolong the production cycle, and is not conducive to equipment maintenance

[0004] The above ring forming method does not disclose the specific process steps of rolling aluminum alloy special-shaped ring forgings. When rolling aluminum alloy special-shaped ring forgings, from the alloy bar to the final rolling of the special-shaped ring forgings, the amount of deformation of the alloy has a significant impact on the ring. The structure and performance of forgings have a great influence, and the inaccurate selection of deformation amount will cause defects such as structure variation, coarse grains, crushing, cracking, and flashing of ring forgings, which will affect the delivery and use of forgings

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