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Aiming at machining an integral impeller used by an aero-engine by NC-Electrochemical Machining (NC-ECM),we first describe the fitting of a distorted blade surface with a ruled surface. Then a four-axis NC-electrochemical machining process is analyzed and the movement of the impeller is studied by using an equivalent open-loop plane motion link,and every program segment’s feed displacement of three axes is calculated by analytical solution. Through comparing two results which are obtained,respectively,from analytical solution and experimental result,the comparative effectiveness has proved that the analytical solution is useful in calculating the feed displacement. The study is helpful for the programming of the machining process.
Aiming at machining an integral impeller used by an aero-engine by NC-Electrochemical Machining (NC-ECM), we first describe the fitting of a distorted blade surface with a ruled surface. and the movement of the impeller is studied by using an equivalent open-loop plane motion link, and every program segment of the feed displacement of three axes is calculated by analytical solution. respectively comparing two results which are obtained, respectively, from analytical solution and experimental result , the comparative effectiveness has proved that the analytical solution is useful in calculating the feed displacement. The study is helpful for the programming of the machining process.