Machining method of marine controllable-pitch propeller blades on numerical control machine tool

Abstract

The invention relates to the technical field of propeller production, in particular to a machining method of marine controllable-pitch propeller blades on a numerical control machine tool. The paddle is placed on a rotary workbench of a machine tool; according to the section pitch angle and width of the blade, whether a machine ram exceeds the stroke or not when the blade is machined is judged; if yes, the blade of the controllable-pitch propeller rotates around the radiation reference line by a certain angle, so that the distance between the surface of the blade and the end face of the ram of the machine tool is relatively uniform, and the extension amount of the ram is minimized. Meanwhile, according to the rotating angle of the blade, the components of the rotating axis direction of the rotated blade in the axis direction and the horizontal direction of the main shaft of the machine tool are calculated, the calculation result is set in the machining offset of the machine tool, and blade machining is completed in the machining mode of the synthesized offset. The machining error caused by the fact that offset machining is only carried out in the axis direction of a machine tool spindle after the propeller blade rotates can be avoided, and finally machining of the controllable-pitch propeller blade is efficiently and accurately completed in a five-axis face milling mode.

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