Forging forming process of high barrel-shaped aluminum alloy forged piece

The invention relates to a forging forming process of a high barrel-shaped aluminum alloy forged piece. A cross upsetting and rolling method is adopted in a forging process, so that on one hand, an aluminum alloy blank can be fully deformed, and a casting-state structure is enabled to be changed into a forged structure, on the other hand, by use of the cross upsetting and rolling method, the anisotropy of an aluminum alloy ring piece can be reduced and the radial elongation of the aluminum alloy ring piece can be improved. The feeding rate of a ring rolling machine during ring rolling is changed in a forging process, so that the aluminum alloy forged piece is prevented from being overheated on one hand, and the end surface of the aluminum alloy forged piece can be prevented from peeling and sinking; and besides, the aluminum alloy forged piece is subjected to heat treatment, so that the intensity of the forged piece can be improved, hardening constituents precipitated out from the aluminum alloy forged piece at the heat treatment temperature can be finely dispersed and distributed, the participating stress of the aluminum alloy forged piece can be reduced and the follow-up machining deformation can be prevented.