Machining method of thin-wall weak-rigidity long-span annular hollow structure part

The invention relates to the technical field of aerospace part machining, and discloses a machining method of a thin-wall weak-rigidity long-span annular hollow structure part, which comprises the following steps: S1, preparing a part blank; and S2, the part blank and the like are clamped through a front face heightening tool. Aiming at the clamping of a thin-wall weak-rigidity structure, the self-adaptive pressing tool is designed to realize the self-adaptive pressing of a part, so that the clamping force direction of the self-adaptive pressing tool is vertical to the larger-area surface in all contact surfaces of a main positioning element and the part, the part is ensured to have enough clamping rigidity, the machining vibration is prevented, and the machining precision is improved. Therefore, machining efficiency is improved, and part surface quality is guaranteed. Partition stable cutting machining is carried out on the part with a part reinforcing rib as a boundary, the principle followed by stable mach