Forming method of large-curvature part product

A forming method of a large-curvature part product belongs to the technical field of part stamping forming and comprises the steps of a preparation stage, a blanking stage, a first-time pre-pressing forming stage, an edge cutting stage, a second-time pre-pressing forming stage, a solution treatment stage and a final pressing forming stage. According to the forming method of the large-curvature part product, a brand new stamping forming process of two-time pre-pressing forming and one-time final pressing forming is adopted, the U-shaped bottom end of the large-curvature part is in a protruding transition state during second-time pre-pressing forming, and the U-shaped bottom end of the large-curvature part is changed into a final state from the protruding transition state during final pressing forming; the deformation amount of the U-shaped bottom end of the large-curvature part is increased when the U-shaped bottom end of the large-curvature part is changed into the final shape, then the resilience amount of t