This study focuses on algorithm for generation non-interference tool-path for manufacturing blades of integral impeller. The interference is classified into three kinds according to occurring area. The algorithm mentioned in the paper can be used to check not only interference between the cutter and the machined area of an integral impeller part, but also interference between the cutter and the tip area of blades, including the machining blade and the adjacent blade. The correction for tool-path is done to avoid the interference. Computer simulations of machining an integral impeller and correction for tool path are conducted to verify the efficiency of the algorithm.

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