Process characteristic measurement construction and processing method for large-scale complex-surface part

The invention discloses a process characteristic measurement construction and processing method for a large-scale complex-surface part. The method comprises the following steps: establishing a space rectangular coordinate system of the large-scale complex-surface part; constructing a part design model according to the established space rectangular coordinate system, and extracting process features; constructing a parameter equation of the extracted process features; carrying out clamping and profile measurement on the to-be-processed part blank to obtain an initial curved surface data packet and a clamping state process curved surface data packet; reconstructing the actual curved surface of the inner surface according to the initial curved surface data packet and the clamping state process curved surface data packet; extracting process characteristic coordinates according to the reconstructed inner surface curved surface; fitting and constructing a process curved surface according to the extracted process cha