Integral forging forming method for large aluminum alloy thick-wall square ring forge piece

The invention discloses an integral forging forming method of a large aluminum alloy thick-wall square ring forge piece. An aluminum alloy cast ingot is placed in a heating furnace to be heated along with the furnace and then subjected to heat preservation; the upset aluminum alloy cast ingot is drawn out again in the length direction, rounded and then blanked; and 3, upsetting the blank, punching by adopting a punch, then transferring the blank to a ring rolling mill for chambering, putting a rectangular core shaft into the chambering ring blank in the step 3, and pressing and square-gauging by virtue of a concave anvil, so that the final forming of the square ring forge piece is realized. The method is easy to operate, the forge piece is fully compacted in the longitudinal direction, the transverse direction and the height direction through the upsetting, drawing-out and chambering processes, the structure performance of the forge piece is good, the allowance of the forge piece is small, and economic benefi