Forming mold for semi-spherical components and multi-pass forming method

The invention discloses a forming mold for semi-spherical components and a multi-pass forming method, belongs to the technical field of semi-sphere formation, and solves the problems of corrugation and cracking in deep drawing formation of high-height-diameter-ratio semi-spherical components, difficult control of deep drawing process parameters and weaker wall thickness uniformity in the prior art. The forming mold comprises a concave mold, a convex mold, a blank holder and a positioning plate; the concave mold and the convex mold are used for forming the semi-spherical components; the blank holder is arranged between the concave mold and the convex mold, and is matched with the concave mold to tightly press blanks to prevent corrugations of the blanks in the forming process; the blank holder is provided with a positioning plate; and the positioning plate is used for positioning an upper mold and a lower mold. The forming mold and the forming method are suitable for formation of high-height-diameter-ratio sem