The invention belongs to the field of aluminum
alloy processing, and particularly relates to a thin-wall deep-cavity multi-rib aluminum
alloy host shell production process which comprises the following steps: homogenizing a cast aluminum bar, and
cutting the homogenized cast aluminum bar into a blank; symmetrically-distributed axial grooves are machined in the periphery of the blank, and sawtooth-shaped sharp edges are formed; the finished blank is subjected to cold and hot pretreatment of first heating,
liquid nitrogen edge
cold treatment and reheating; feeding the pretreated blank into a special
forging and pressing die for
forging and pressing; and finally, a finished product is obtained through
quenching, aging, finish
machining and
anodic oxidation. According to the method, the blank is subjected to
surface finishing and special cold and hot pretreatment before
forging, so that the problems that the thin-wall deep-cavity multi-rib structure is uneven in side wall thickness and poor in perpendicularity during forging are effectively solved, the quality of an
anodic oxide film in a
corner angle area is remarkably improved, a film layer is prevented from losing
efficacy in advance, and the service life of the film layer is prolonged. And meanwhile, unique mould pressing
precipitation lines are formed on the surface of the product and can be used as anti-counterfeiting marks.