The invention discloses an online milling deformation measurement and
complementation machining method for a thin-walled part. The online milling deformation measurement and
complementation machining method for the thin-walled part comprises the steps that 1, a three-dimensional model of the thin-walled part is established, and a
numerical control code is obtained; 2,
measurement point locations are extracted from the three-dimensional model; 3, based on the model, a measurement path is planned; 4, rough
machining and semi-precise machining are conducted on a workpiece blank; 5, online measurement is conducted, and the coordinate values of all the planed
measurement point locations are obtained; 6, the obtained coordinate values of the planed
measurement point locations are compared with those of the corresponding point locations on the three-dimensional model of the thin-walled part, and the difference between the coordinates of each
point location of the actually machined workpiece and those of the corresponding
point location on the three-dimensional model is calculated; 7, according to the machining differences, a
complementation factor optimal machining path is generated according to the machining differences, precise machining is conducted according to the path, and then the final deformation deviation and the compensation values are obtained. By the adoption of the online milling deformation measurement and complementation machining method, semi-precise machining and precise machining are adopted, the identical machining parameters are adopted by the semi-precise machining and the precise machining, and the best precise machining
compensation effect of the thin-walled parts which are made of the same materials and have the same characteristics can be achieved to the greatest extent through only one group of tests.