工具切れ刃位置性能を考慮した3+2軸NC加工法の研究

概要

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In this research, the tool attitude determination problem and tool path generation in 3+2 axis NC control machining of the complicated shape containing a curved surface are treated. A tool uses the ball end mill which machining performance differs with a cutting position of the edge. STL data was adopted as shape data. The machining performance in the good cutting position of the edge was examined using the tool attitude vector and the normal of the triangle which constitutes the shape. By doing so, the tool attitude estimation map was memorized a total machining area which can be cut by good cutting position of the edge, about every tool attitude. Optimal tool attitude was determined by selecting the attitude having the maximum rate on the map. Furthermore, a machining surface group is generated by extracting the triangle which adjoins out of the triangle able to be cut by good cutting position of the edge. The tool path about the machining surface group was generated by applying the thinning processing algorithm of image processing, and the validity was confirmed by machining experience.