A segmented vibration-reducing rough milling method for large impeller blades that can maintain machining rigidity

Abstract

The present invention relates to the technical field of integral impeller machining of aircraft engines, and in particular to a segmented vibration-damping rough milling method for large impeller blades capable of maintaining machining rigidity, comprising the following steps: one, selecting milling tool specifications according to the structural dimensions of the large impeller blades; two, selecting the machining depth and machining allowance of the segmented rough milling according to the rigidity of the process system; three, selecting non-uniform cutting step parameters for segmented rough milling of the blade cavity; four, calculating the segmented rough milling tool trajectory of the blade cavity using a non-uniform step method; five, calculating the unsteady cutting feed rate for segmented rough milling of the blade cavity; six, calculating the segmented rough milling tool trajectory of the blade side wall; and seven, performing machining according to a determined segmented rough milling sequence. The present invention adopts two tools of different specifications to respectively perform blade cavity rough milling and blade side wall rough milling, with the goal of controlling cutting vibration and maintaining machining rigidity, formulating a segmented rough milling strategy, and improving the machining efficiency and machining stability of large impeller blades.

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