抄録
This paper proposes a generation method of bars and holes having polygonal cross section shapes with filleted corners. The method is achieved by turning a couple of work piece and tool with a constant angular velocity ratio. When the work piece and tool mesh with each other, namely, a meshing point on which a common normal velocity can be determined, and a stagger angle between their axis of rotation exists, a relative sliding velocity align with the work piece's edge line can be generated. Since the above logic is same to that of gear meshing theory, a tool piece's outline shape which can mesh with the shape of a target work piece can be calculated as conjugate of it. In this paper, arbitrary polygonal target shape with fillets is described as repetition of unit shape, namely a ″tooth″, and a calculation scheme of conjugate tool shape with necessary definition of coordinate frames and variables is determined. Validity of this scheme is experimentally demonstrated at last.
