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本文在分析叶轮型面几何特性的基础上，对半开式叶轮的几种加工方法进行了详细的分析，在此基础上提出了能加工出较高质量叶轮的一种理想的数控加工工艺。
Based on the analysis of geometrical characteristics of impeller profile, several machining methods of semi-open impeller are analyzed in detail. Based on the analysis, an ideal numerical control machining technology that can produce higher quality impeller is proposed.