Compensation and correction method for molded surface of forming die of cap-shaped composite material part

The invention discloses a method for compensating and correcting a molded surface of a forming die of a cap-shaped composite part, which belongs to the technical field of manufacturing of composite parts and comprises the following steps of: performing data comparison and calculation on an actual measurement data set of an actual part and a target data set of a target part to obtain a rebound deformation angle; the molded surface of the forming mold is used as a research object, the intersection point of curvature extension lines of two line segments on the two sides of each fillet is used as a rotation point on each section, and reverse rotation compensation in the springback direction is carried out according to the springback deformation angle; the included angle A of the curvature extension lines of the two line segments on the two sides of the fillet subjected to reverse rotation compensation is subjected to rounding treatment, and all compensated sections are obtained; and connecting the compensated sec