Machining error compensation for thin-walled curved surface parts based on NURBS Surface reconstruction

Thin-walled curved surface parts are weak in rigidity and difficult to machine, which makes them very prone to deformation during machining, affecting the machining accuracy of the workpiece. This study proposes a machining error compensation method based on Non-Uniform Rational B-Spline (NURBS) surface reconstruction. The control points of the design surface are adjusted according to the machining error of a series of discrete points on the thin-walled curved surface to get the machined surface. The machining error of the whole surface is obtained by calculating the deviation between the design surface and the reconstructed surface. The surface machining error compensation is realized by constructing the compensation surface by mirroring the coordinates of the compensation points. Finally, the effectiveness of this method is verified by simulation analysis.