Manufacturing method of variable-thickness frame chord profile part

The invention discloses a manufacturing method of a variable-thickness frame chord profile part. The manufacturing method comprises the steps that S1, a profile to be machined is fixed to a three-coordinate numerical control machine tool; S2, the to-be-machined profile is subjected to numerical control high-speed milling to reach the thickness size and the boundary dimension of a part, and a profile part is obtained; S3, the profile part is annealed; S4, the profile part is subjected to stretch bending forming through a stretch bending machine; S5, the profile part is quenched; and S6, the profile part is subjected to roll bending forming, and the variable-thickness frame chord profile part is obtained. According to the manufacturing method, the profile to be machined is milled to the thickness size and the boundary dimension of the variable-thickness frame chord profile part, the thickness size of the part is guaranteed, and meanwhile, the thickness of the part in the forming process is reduced, so that spri