Cold pressing method for reducing residual stress of ultra-large aluminum alloy integral frame die forging

The invention discloses a cold pressing method for reducing residual stress of an ultra-large aluminum alloy integral frame die forging, belongs to the field of die forging residual stress control, and aims to effectively reduce the residual stress. The inner side face and the outer side face of a forge piece high rib of the forge piece model are planes with pattern draft. The cavity top of the high rib cavity of the cold pressing die designed according to the forge piece model is a positive gap relative to the rib top of the forge piece high rib; the side surface of the cold-pressed high rib cavity is a negative gap relative to the side surface of the forge piece high rib; the cold pressing web cavity is a positive gap relative to the forge piece web; and the cavity top of the cold-pressure low rib cavity is a negative gap relative to the rib top of the forge piece low rib. Optimizing a cold pressing die; forge piece forging is carried out through the cold pressing die. The projection area of the pressure-be