3次元高精密形状創成のためのフェムト秒レーザー加工CAMシステムの開発

抄録

In femtosecond laser processing, it is difficult to accurately process a three-dimensional shape by 2.5-dimensional irradiation paths because a three-dimensional removal shape by ablation is not identified. Therefore, a femtosecond laser CAM system based on the identified three-dimensional removal shape is required to process a three-dimensional shape with curved surfaces and highly inclined surfaces. This paper proposes a novel method to generate femtosecond laser processing paths for processing the three-dimensional shape. In the method, a virtual tool shape of femtosecond laser processing is identified based on a removal shape formed by femtosecond laser irradiation. Femtosecond laser paths to process a required shape are generated based on the inverse offset method using the virtual tool. An unprocessed shape (undercut) by femtosecond laser processing was identified by a femtosecond laser processing simulation system and paths to process the unprocessed shape changed in the setting angle of a workpiece are additionally generated. The change in the setting angle of a workpiece is continued until there is no unprocessed shape. The effectiveness of the proposed method was then verified by experiments.